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HJ 2052-2016

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HJ 2052-2016English509 ASK Days<=4 Technical specifications of flue gas limestone/limegypsum desulfurization project for iron and steel industry sintering machine Valid HJ 2052-2016
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Detail Information of HJ 2052-2016; HJ2052-2016
Description (Translated English): (Iron and steel industry sintering flue gas desulfurization project technical specification of wet limestone/lime - gypsum)
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: Z25
Word Count Estimation: 22,217
Date of Issue: 2016-04-29
Date of Implementation: 2016-08-01
Regulation (derived from): Ministry of Environmental Protection Announcement No. 33 of 2016

HJ 2052-2016
(Iron and steel industry s boast gas desulfurization project technical specification of wet limestone/lime - gypsum)
National Environmental Protection Standard of the People 's Republic of China
Technical specification for flue gas desulfurization of sintering machine in iron and steel industry
Wet limestone/lime - gypsum method
Technical specifications of flue gas limestone/limegypsum desulfurization
Project for iron and steel industry s sintering machine
2016-4-29 released
2016-8-1 implementation
Ministry of Environmental Protection released
Directory
Preface
1 Scope of application
2 normative reference documents
3 Terms and definitions 3
Pollutants and Pollutants 4
5 General requirements .4
6 process design .6
7 Major process equipment and materials 11
8 detection and process control ..12
Major auxiliary works
10 Labor safety and occupational health
Construction and Acceptance
12 Operation and Maintenance
Appendix A (informative) Steel industry sintering machine flue gas wet limestone - gypsum desulfurization process flow chart 20
Appendix B (informative) Iron and steel industry sintering machine flue gas wet lime - gypsum desulfurization process flow chart .22
APPENDIX C (INFORMATION APPENDIX) Calculation of Representative Value of Building and Gravity Loads
Appendix D (informative) Thermometer for indoor heating in winter
Appendix E (informative) Air conditioning interior design parameter table
Preface
In order to implement the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution,
Standard steel industry sintering machine flue gas desulfurization project construction and operation and management, prevention and control of environmental pollution, environmental protection and
Human health, the development of this standard.
This standard specifies the steel industry sintering machine flue gas wet limestone/lime - gypsum desulfurization engineering design,
Construction, acceptance, operation and maintenance and other technical requirements.
This standard is a guiding standard.
This standard is the first release.
This standard is organized by the Ministry of Environmental Protection Science and Technology Standards Division.
The main drafting unit of this standard. China Environmental Protection Industry Association, China Environmental Science Research Institute, Yongqing
Environmental Protection Co., Ltd., Beijing Lideheng Environmental Protection Engineering Co., Ltd.
The environmental protection department of this standard approved on April 29,.2016.
This standard is implemented on August 1,.2016.
This standard is explained by the Ministry of Environmental Protection.
Technical specification for flue gas desulfurization of sintering machine in iron and steel industry
Wet limestone/lime - gypsum method
1 Scope of application
This standard specifies the steel industry sintering machine using wet limestone/lime - gypsum flue gas desulfurization project design,
Construction, acceptance, operation and maintenance and other technical requirements.
This standard applies to the iron and steel industry sintering machine area of 90 m2 and above flue gas desulfurization project, can be used as steel workers
Environmental impact assessment, environmental protection facilities design and construction, construction project environmental protection acceptance and construction
Operation and management of the technical basis.
2 normative reference documents
The contents of this standard refer to the terms of the following documents. For those who do not mind the date of the reference file, the valid version applies
In this standard.
GB 150 steel pressure vessel
Standard for Environmental Noise Discharge of Industrial Enterprises
Emission standard for water pollutants in iron and steel industry GB 13456
Rubber linings - Part 1. Equipment - Protective linings GB 18241.1
Rubber linings - Part 4. Flue gas desulfurization liners GB 18241.4
Standard for Pollution Control of Storage and Disposal Site for General Industrial Solid Waste
GB 28662 Steel Sintering, Pellet Industrial Air Pollutant Emission Standard
Specification for load of building structures GB 50009
Specification for Seismic Design of Buildings GB 50011
Code for design of outdoor drainage
Code for design of building water supply and drainage
Code for design of steel structure GB 50017
Code for design of heating, ventilation and air conditioning GB 50019
Standard for Building Lighting Design
GB 50040 Power Machine Foundation Design Code
Code for design of corrosion protection for industrial buildings GB 50046
Code for design of power distribution system for GB 50052
Code for design of substations up to and including 20 kV
Code for design of lightning protection for buildings GB 50057
Code for design of automatic fire alarm system GB 50116
Code for design of high - rise structures GB 50135
Code for design of building fire extinguisher GB 50140
Code for design of room for electronic information system GB 50174
Code for design of electrical engineering cables GB 50217
Code for fire protection in interior decoration design of buildings GB 50222
Code for classification of seismic fortification for construction engineering GB 50223
Code for fire protection design of iron and steel metallurgy enterprises GB/T
General rules for equipment and piping insulation
Guide for adiabatic design of equipment and pipelines GB/T 8175
GB/T 12801 General requirements for safety and hygiene of production processes
GB/T 20801 Pressure piping specification Industrial piping
GB/T 21833 Austenitic ferritic duplex stainless steel seamless steel pipe
Code for design of noise control for industrial enterprises GB/T
Code for design of mine and mine
GB Z1 industrial enterprises design health standards
GB Z2.1 Workplace Hazardous Factors Occupational Exposure Limits - Part 1. Chemical Hazardous Factors
Occupational exposure limits for workplace hazards Part 2. Physical factors
CJ343 sewage discharged into the town sewer water quality standards
Technical specification for DC system design of power engineering
Technical specification for design of flue gas pulverized coal pipeline in power plant of DL/T 5121
Technical specification for continuous monitoring of flue gas emissions from fixed pollution sources of HJ/T 75 (for trial implementation)
HJ/T 328 Environmental protection product technical requirements Pulse jet type bag filter
HJ/T 329 environmental protection products technical requirements rotary backflush bag filter
HG20538 lined with plastic (PP, PE, PVC) steel pipe and pipe fittings
HG21501 lined steel pipe and pipe fittings
Construction Technology of HG/T 2640 Glass Flake Lining
HG/T 21633 glass pipe and fittings
Specification for Construction and Acceptance of Chemical Equipment and Pipeline Anticorrosion Engineering
JB/T 10989 wet flue gas desulfurization device special equipment defogger
"Pressure vessel safety technical supervision procedures" (Quality Supervision Bureau of the National Development [1999] No. 154)
"Construction project (project) completion and acceptance method" (construction construction [1990] 1215)
3 terms and definitions
The following terms and definitions apply to this standard.
Sintering flue gas sintering flue gas
Refers to the iron containing raw materials, additives and fuel in the sintering process by the main exhaust fan out of the particulate matter, SO2, NOX,
Dioxins and other pollutants.
Desulfurization equipment desulphurization equipment
Refers to the use of physical or chemical methods to remove flue gas SO2 device.
3.3 absorbent
Refers to the desulfurization process used to remove SO2 and other acid gas reactants. Absorbents in this standard refer to limestone
(CaCO3) or quicklime (CaO).
3.4 absorber absorber
Refers to the removal of flue gas SO2 and other pollutants in the reaction device.
3.5 desulfurization waste water
Refers to the desulfurization process generated by heavy metals, soluble salts and other impurities in the acidic wastewater.
3.6 Desulfurization efficiency desulfurization efficiency
Refers to the amount of SO2 removed by the desulfurization unit and the percentage of SO2 contained in the flue gas before desulfurization, calculated according to formula (1)
Desulfurization efficiency
Q ×
QCQC - x
× 100% (1)
Where.
C1 - Desulfurization before flue gas SO2 concentration, mg/m3 (101325Pa, 0 ° C, dry basis);
Q1 - Desulfurization before flue gas flow, m3/h (101325Pa, 0 ° C, dry basis);
C2 - desulfurization flue gas SO2 concentration, mg/m3 (101325Pa, 0 ° C, dry basis);
Q2 - desulfurization flue gas flow, m3/h (101325Pa, 0 ° C, dry basis).
Booster up fan
Fans added to overcome the flue gas resistance of the desulfurization unit.
Oxidation fan
For the absorption of the slurry to provide oxidative air will absorb the generated calcium sulfite oxidation generated calcium sulfate fan.
3.9 empty tower speed empty bed velocity
The average velocity of the flue gas through the absorption tower, in m/s.
Pollutants and Pollutants
4.1 Flue gas at the inlet of desulphurization unit
4.1.1 new sintering machine desulfurization device inlet flue gas should be sintering machine design flow based on the case, according to the local gas
Pressure, temperature and other factors accounted for the standard flue gas flow.
4.1.2 The amount of flue gas at the inlet of the desulphurization unit of the sintering machine should be based on the measured amount of flue gas at full load and 10%
The margin.
4.2 Desulfurization unit inlet pollutant concentration
4.2.1 Sintering machine flue gas SO2 concentration should be based on measured data or material accounting data to determine.
4.2.2 Desulfurization device inlet flue gas SO2 production can be estimated according to formula (2).
Mso2 = 2 × K × (R × Sr F × Sf)/100 (2)
Where.
MS2 - SO2 production in inlet flue gas desulfurization unit, kg/h;
K-raw materials, fuel in the sintering process of sulfur conversion rate, generally take 0.8 ~ 0.85;
R - the amount of raw materials added during the sintering process, kg/h;
F - the amount of fuel added during sintering, kg/h;
Sr - average sulfur content of raw materials during sintering process,%;
SF - average sulfur content of the fuel during sintering.
4.2.3 The average sulfur content of raw materials and fuels should take full account of the source of raw materials and fuel trends.
5 General requirements
5.1 General provisions
5.1.1 sintering process should be consistent with national policies, regulations, standards and clean production requirements, from the production process source
Head to reduce pollution load, control the generation of pollutants and reduce emissions.
5.1.2 sintering flue gas desulfurization project should follow the "three simultaneous" system. Desulphurization technical solutions and equipment, material selection should be
According to the whole plant planning and the actual situation, after the technical and economic feasibility studies to determine the priority selection of energy saving, environmental protection, safety equipment.
5.1.3 SO2 concentration in the flue gas of the desulfurization unit shall meet the limits specified in GB 28662 and shall meet the environmental impact assessment
Price approval documents required.
5.1.4 desulfurization equipment should be installed according to the requirements of the local environmental protection departments continuous automatic monitoring system.
5.1.5 desulfurization wastewater should be given priority. Direct emissions should be achieved when GB 13456 and environmental impact assessment documents are approved
When it is discharged into other sewage treatment plants in the factory, it shall meet the requirements of the sewage treatment unit.
5.1.6 desulfurization gypsum disposal should give priority to comprehensive utilization. When there is no comprehensive utilization conditions, its disposal should be consistent
GB 18599 requirements.
5.1.7 desulfurization device design, construction, should take effective sound insulation, muffler, green and other vibration and noise reduction measures, noise
Sound and vibration control design should be consistent with GB/T 50087 and GB 50040 requirements, the factory boundary noise should meet GB 12348
The request.
5.2 Desulfurization device composition
5.2.1 Desulphurization devices are covered by all process systems from the main exhaust fan outlet flue to the discharge chimney,
Systems and auxiliary systems.
5.2.2 Process systems include flue gas systems, absorbent preparation and supply systems, absorption systems, oxidative air systems, off
Sulfur gypsum treatment system, accident evacuation system, desulfurization wastewater treatment system.
5.2.3 Common systems include compressed air systems, process water systems, etc.
5.2.4 Auxiliary systems include electrical systems, automatic control systems, building structures, heating and ventilation and air conditioning,
Water, fire and other systems.
5.3 Overall layout
5.3.1 General provisions
5.3.1.1 The overall layout of the desulfurization unit shall be based on the site geological, terrain, meteorological conditions, to meet the smooth process,
Material delivery short, easy construction and maintenance of maintenance principles, and in line with GB 50414, GB J22 requirements.
5.3.1.2 desulfurization equipment should be placed near the sintering flue gas discharge point.
5.3.1.3 Absorbent discharge and storage facilities should be close to the main transport corridor, to avoid the larger flow of people.
5.3.1.4 Absorbent preparation facilities, desulphurized gypsum treatment facilities should be located adjacent to the absorption tower.
5.3.1.5 desulfurization wastewater treatment facilities should be close to the layout of desulphurized gypsum treatment facilities, and is conducive to wastewater treatment standards
Reuse or discharge.
5.3.1.6 gypsum storage facilities should be close to the gypsum dewatering facilities, and a smooth transport channel.
5.3.1.7 Emission chimneys should avoid crowded places and parking lots when conditions permit.
5.3.1.8 The lower part of the absorption tower should be based on local weather conditions to determine whether the closed layout or take other insulation measures; winter
The temperature below 0 ℃ in the area, the accident slurry tank outside the layout should take insulation antifreeze measures.
5.3.1.9 For the coldest monthly average temperature below -10 ℃, all rotating equipment should be arranged indoors.
5.3.2 General chart transport
5.3.2.1 General drawings The transport design shall comply with the overall planning requirements of the sintering machine and shall be in accordance with the requirements of the production process and the use function.
Building cloth (structure) building.
5.3.2.2 Desulphurization plant area of the road design, should ensure that the desulfurization device material transport convenient, smooth fire channel,
Maintenance and easy maintenance, and meet the requirements of site drainage.
5.3.2.3 Limestone powder or lime powder transport vehicles should be selected from dump truck, limestone blocks or lime blocks and plaster
Do not choose to dump truck.
5.3.2.4 Vehicle loading and unloading gypsum vehicle parking lot The slope of the road section should be flat slope. Arrangement is difficult when max
Slope should not be more than 1.5%. Loading and unloading should be left enough to drive, turn the venue, and according to the requirements of driving the road hard
Treatment.
5.3.3 Pipeline layout
5.3.3.1 Pipeline layout should be short, straight, centralized, pipelines and buildings and roads should be arranged in parallel, dry pipe should be close to the main
To the user or branch more side of the layout.
5.3.3.2 In addition to rainwater sewer, domestic sewage sewer, desulfurization slurry overflow and runoff and other pooled trench, desulfurization equipment
The pipeline should be laid in an integrated overhead mode.
5.3.3.3 pipelines on the use of multi-storey layout, corrosive media containing the pipe should be placed in the lower, public
Engineering pipeline, cable bridge should be arranged in the upper.
5.3.3.4 cable laying should avoid contact with corrosive media, should be shelved or taken anti-corrosion measures buried laying.
6 process design
6.1 General requirements
6.1.1 The desulfurization unit shall be designed to match the flue gas change of the sintering machine.
6.1.2 New sintering machine of the main exhaust fan selection should be synchronized to consider the desulfurization device resistance.
6.1.3 Desulfurization efficiency of the desulphurization unit shall be determined according to GB 28662 and the environmental impact assessment
Value is determined, but the minimum shall not be less than 90%.
6.1.4 should consider the flue gas chloride, fluoride, soot and other pollutants on the desulfurization device.
6.2 Process flow
Wet limestone/lime - gypsum flue gas desulfurization of the typical process diagram shown in Figure 1, the detailed process flow chart
See Appendix A and Appendix B.
Export flue gas
Process water
Compressed air
Gypsum slurry
Sintering machine flue gas
Desulfurization wastewater
Oxidation wind
Absorbent
Accident slurry and empty the slurry
Figure 1 Schematic diagram of flue gas desulfurization process
Flue gas system
Absorption system
Accident evacuation system
Desulfurization gypsum treatment
system
Desulfurization wastewater
Processing system
Reuse or discharge
Absorbent preparation with
Supply system
plaster
Process water
system
Oxidizing air
system
Compressed air
system
6.3 Flue gas system
6.3.1 Desulphurization device Flue guard door should have good operation and sealing performance.
6.3.2 baffle door sealing air pressure should be higher than the flue gas pressure 500Pa, baffle door sealing air temperature should be greater than the flue gas dew point temperature,
Sealed air heater inlet air temperature should use the coldest month average temperature.
6.3.3 Locations close to the baffle doors shall be provided with platforms and escalators for maintenance and repair. The platform design load shall not be less than
4kN/m2.
6.3.4 flue gas flow rate design value should not be greater than 15m/s, flue strength design should meet the DL/T 5121 regulations.
6.3.5 absorption tower flue gas inlet flue should be set up flue gas emergency cooling facilities, and take reliable anti-corrosion measures, import smoke
Road anti-corrosion section from the absorption tower from the outer wall of the shortest distance of not less than 5m.
6.3.6 desulfurization booster fan should be located in the absorption tower before the entrance flue, a tower should be equipped with a booster fan.
New sintering machine should use the main exhaust fan and booster fan in one way set.
6.3.7 The air volume of the booster fan shall be the amount of flue gas under the maximum load condition of the sintering machine and shall not be less than the normal operation of the sintering machine
The maximum amount of flue gas at the highest exhaust gas temperature; the pressure rise of the booster fan shall be the desulfurization unit at the maximum load condition of the sintering machine
Consider 120% of the flue gas resistance of the desulfurization unit at a temperature margin of 10 ° C.
6.3.8 When the expansion joint is to be provided on the flue, the design pressure of the expansion joint shall be the positive pressure/negative pressure of the flue design
On the margin of at least 1000Pa. Expansion should be selected non-metallic materials and set up drainage facilities.
6.4 Absorbent preparation and supply system
6.4.1 Absorbents should be preferred limestone. Depending on the performance of the absorbent, the absorbent preparation process is selected as follows.
A) the choice of limestone powder as an absorbent, the limestone powder CaCO3 content should be ≥ 90%, fineness should be at least full
Foot 250 mesh 90% sieving rate; select lime powder as absorbent, lime powder CaO ≥ 80%, fineness should be at least full
Foot 180 mesh 90% sieving rate. The limestone/lime powder satisfying the above requirements is stirred with water to form a slurry.
B) the choice of particle size less than 20mm block limestone Preparation of absorbent, it is appropriate to use wet ball mill pulverized pulp
Liquid; when the use of dry grinding, the milling facilities should be in the desulfurization device area outside the separate construction. Wet or dry pulping, stone
Gray stone fineness are at least satisfied with 250 mesh 90% sieving rate; when the choice of particle size greater than 20mm block limestone,
Before the first line should be broken.
6.4.2 Two or more sets of absorbers should be used in combination with an absorbent preparation system.
6.4.3 The output of the absorbent preparation system shall be selected at 150% of the limestone/lime consumption in the design case.
6.4.4 Limestone/lime storage capacity should be determined according to local transport conditions, generally should not be less than the design conditions 3d stone
Limestone/lime consumption. When using limestone/lime powder, the bottom of the tank should be set up gas flow device.
6.4.5 When using wet ball mill pulping, limestone slurry tank capacity should meet the design conditions of 6 ~ 10h limestone slurry
Liquid consumption; limestone/lime slurry tank capacity should not be less than the design conditions
4h of limestone/lime slurry consumption.
6.4.6 Each ball mill shall be provided with a limestone slurry tank, and each limestone slurry circulation tank shall be provided with two stone
Limestone slurry circulation pump, one with a prepared. Limestone slurry circulation pump outlet pipe should be used to set the return.
6.4.7 slurry pipeline design should take full account of the working medium on the pipeline system corrosion and wear. Flow rate in the pipe medium
The choice of both to avoid slurry precipitation, but also to make the pipeline wear and pressure loss as small as possible.
6.4.8 slurry valve on the switch valve should use butterfly valve, regulating valve should adopt ceramic ball valve. The diameter of the valve should be with the pipeline
Consistent diameter.
6.4.9 Slurry piping should be equipped with evacuation and outage flushing facilities.
6.4.10 Absorbent preparation system should control secondary dust pollution. Limestone/lime unloading, storage system should use bag filter
Prevent dust pollution. The performance of the bag filter should meet the requirements of HJ/T 328, HJ/T 329.
6.5 Absorption system
6.5.1 The type of absorption tower should be selected according to local conditions, should adopt the spray absorption tower.
6.5.2 The air vapor in the absorption tower should be less than 3.6m/s.
6.5.3 in the spray absorption tower smoke inlet upper part of the slurry spray layer, spray layer should not be less than 3 layers, layer spacing is not
Should be less than 1.8m. The top layer of the spray layer should be arranged one-way nozzle, the remaining layers should be arranged two-way nozzle. Each spray layer
Should be equipped with a circulating pump, if necessary, consider standby.
6.5.4 When using limestone as the absorbent, the liquid to gas ratio should be not less than 10L/m3 (export wet flue gas), pH should be controlled at
5.2 ~ 5.8; when using lime as the absorbent, the liquid to gas ratio should not be less than 6L/m3 (export wet flue gas), pH should be controlled at
5.2 to 6.5.
6.5.5 slurry density should be controlled between 1080 ~ 1200 kg/m3, calcium and sulfur molar ratio should not be higher than 1.06.
6.5.6 Absorbent tower lining design should be considered adequate anti-wear, anti-corrosion thickness, in the bottom of the absorption tank,
In the upper part of the spray scouring area should be appropriate to increase the anti-slurry erosion wear thickness.
6.5.7 desulfurization equipment should be set up three demister, the first level should adopt the pipe defogger, the second and third level should adopt the house
A ridge defogger or a flat type defogger.
6.5.8 Under normal operating conditions, the droplet concentration in the flue gas from the defogger should not exceed 75 mg/m3. The defogger should
Set up automatic water rinse system.
6.5.9 When using the original chimney smoke, the effect of the wet flue gas produced by the desulfurization unit on the original chimney should be taken into account.
6.5.10 The use of absorption tower top row chimney, the top row of chimneys in the design, construction, transformation should be consistent with safety, the environment
Impact assessment and HJ/T 75 requirements. Flue gas flow in straight chimneys should not exceed 12m/s.
6.5.11 Determination of the height of the row chimney should take into account the SO2, NOX and particulate matter and other pollutants on the surrounding environment
Influence, but the minimum shall not be less than 70m. Chimney steel tower and cable design should be consistent with the relevant provisions of GB 50135.
6.5.12 Absorption tower should be set for operation, maintenance, maintenance, inspection sampling platform, escalator, platform design load should not
Less than 4kN/m², the platform width should be not less than 1.2m.
6.5.13 The slurry piping connected to the nozzle in the absorption tower shall be capable of overhauling and maintenance. The strength design shall be considered not less than
500N/m2 maintenance load.
6.5.14 defogger design should consider maintenance measures, defogger support beam design should be considered not less than 1kN/m2 inspection
Repair load.
6.5.15 Absorption tower slurry pool should be equipped with side-mounted stirrer or pulse suspension mixing facilities. When using a side stirrer
Mixing, the specific power is not less than 0.08kW/m3. When the pulse suspension mixing, the pulse suspension slurry volume should not
Less than 8.5m3/m2 · h.
6.6 Oxidizing air systems
6.6.1 Oxidation of air spray gun, oxygen and sulfur molar ratio should not be less than 2; Oxidation air distribution tube oxidation,
Oxygen and sulfur molar ratio should not be less than 2.8.
6.6.2 oxidation fan outlet pipe should be set to spray humidification cooling facilities, the air into the tower before the temperature should be lower than the absorption tower
Slurry bath slurry temperature.
6.6.3 When the calculated capacity of the oxidation fan is less than 6000m3/h, each absorption tower should be equipped with two full capacity oxidation fans,
One of the spare; such as the design into multiple units, it is appropriate to consider the use of the same type of oxidation fan, which should consider at least one prepared
use. When the oxidation fan calculation capacity is greater than 6000m3/h, it is appropriate to use each absorption tower with three 50% capacity of oxidation
Fan, one of which is spare.
6.7 Accident Emptying System
6.7.1 Desulphurization units shall be provided with an emergency slurry tank (tank). When multiple sets of desulfurization devices use the same desulfurization process,
Combined with an accident slurry pool (box).
6.7.2 Accumulation The capacity of the slurry tank (tank) shall meet the needs of the evacuation tank when the tank is discharged or discharged.
begging.
6.7.3 accident slurry pool (box) should be set up slurry return facilities, the output should be satisfied within 12h will be the accident slurry pool (box)
The stored slurry is all returned.
6.7.4 Accident slurry tank (tank) should take anti-corrosion measures and install anti-slurry deposition device.
6.8 Desulfurization gypsum treatment system
6.8.1 Desulphurized gypsum treatment system should be designed to create conditions for the comprehensive utilization of gypsum.
6.8.2 desulfurization gypsum treatment should be synchronized with cyclone and dehydrator two-stage dewatering facilities. Each absorption tower should be set up a slurry
Liquid cyclone. The secondary dehydration device should preferably use a vacuum belt dewatering machine.
6.8.3 vacuum belt machine dehydration system should be two or more sets of desulfurization device combination of a set of vacuum belt machine is generally not
Less than two. When there is only one sintering machine, you can set up a vacuum belt machine.
6.8.4 Vacuum belt conveyor dehydration system output should be designed under the conditions of desulphurization gypsum 150% of the choice, and not small
The output of desulfurized gypsum at the maximum inlet flue gas SO2 concentration at full load.
6.8.5 desulfurization gypsum after two dehydration after the water content shall not exceed 10%, desulfurization gypsum in the CaSO4 · 2H2O content
Not less than 90% (dry basis).
6.8.6 desulphurization station should be set up fully enclosed desulfurization gypsum library, its capacity should be not less than 3d desulfurization gypsum production, desulfurization
The height of the ointment should ensure that the gypsum transport vehicle is transported smoothly and should not be less than 4.5m.
6.8.7 Desulfurization gypsum treatment system to produce the filtrate should be recycled.
6.9 Process water system
6.9.1 desulfurization process water should be from the sintering machine near the water supply pipe network.
6.9.2 Desulphurization device should be set up a process water tank, the capacity of not less than 1h water consumption.
6.9.3 Each absorber should be equipped with a separate process water pump and defogger rinse pump, process water pump and defogger rinse pump
Should be considered spare.
6.10 Compressed air system
6.10.1 compressed air should be from the sintering machine with compressed air pipe network in the nearest proximity.
6.10.2 Each desulfurization unit should be equipped with a compressed air tank, the capacity of compressed air tank shall not be less than a single set of desulfurization device
15min The average amount of compressed air.
6.10.3 Compressed air tank should be designed according to the pressure vessel and meet the GB 150 and "pressure vessel safety technical supervision procedures"
Claim.
6.10.4 Compressed air piping design should meet GB/T 20801 requirements.
6.11 desulfurization wastewater treatment system
6.11.1 General provisions
6.11.1.1 Desulphurization wastewater is mainly a small amount of waste water produced by desulphurization gypsum treatment system, desulfurization unit should be set up desulfurization wastewater
Processing system, a number of sets of desulfurization device should be set up a desulfurization wastewater treatment system.
6.11.1.2 desulfurization wastewater treatment system processing capacity should be desulfurization wastewater design value of 125% selected.
6.11.1.3 The tank (tank) of the wastewater treatment system shall be provided with a means for preventing the deposition of solid particles, and the piping shall be provided with flushing
Net facilities.
6.11.1.4 desulfurization wastewater treatment system should be set up sludge dewatering equipment, dehydrated mud cake should be the local environmental protection administrative
The competent authorities require proper disposal.
6.11.2 Wastewater treatment process design
6.11.2.1 Wastewater treatment process design should include the removal of heavy metals, COD and sludge dewatering and other units.
6.11.2.2 Removal of heavy metal units set the neutral box, reaction box, flocculation tank of the hydraulic retention time should be no less than
30min, concentrated clarification tank (device) of the hydraulic retention time should be not less than 8h.
6.11.2.3 Removal of COD unit The hydraulic retention time of the buffer box should meet the COD degradation time requirement and set
PH meter.
6.11.2.4 sludge dewatering unit should choose the van or centrifugal dewatering machine, the total output should be the amount of daily sludge generated hours
Average design.
6.11.3 Dosing system design
6.11.3.1 desulfurization wastewater treatment should be based on the amount of water desulfurization wastewater, water quality, combined with material balance
Or actual production data.
6.11.3.2 The storage amount of the drug shall be determined according to the factors such as consumption of the drug, transportation distance, supply and transportation conditions.
According to the consumption of 15d ~ 30d design.
6.11.3.3 Dosing system should be set up various types of drug measurement facilities.
7 Major process equipment and materials
7.1 Major process equipment
7.1.1 360m2 and above sintering machine desulfurization booster fan should adopt adjustable blade axial fan or adjustable blade axial flow
Machine, 360m2 sintering machine below the desulfurization booster fan should adopt efficient centrifugal fan or adjustable blade axial fan. use
Centrifugal fan should be used when the inverter adjustment.
7.1.2 Oxidizing fans should use Roots, centrifugal or screw fans, and equipped with noise reduction facilities.
7.1.3 Flat disc eliminator performance should meet JB/T 10989 requirements.
7.1.4 slurry circulation pump should use large flow, low head, low speed centrifugal pump, its structure should be designed to facilitate the demolition
Unloading or repair.
7.2 Material selection
7.2.1 should be in line with the economy, applicable to meet the principles of desulfurization process, choose long life, the ability of polybasic acid, chloride ion,
The material of the solid particles in the slurry is abrasive.
7.2.2 absorber tower material should use carbon steel. The surface of carbon steel may be exposed to corrosive media should be based on different parts
Bit of the actual working conditions, lining corrosion resistance and wear resistance of non-metallic materials. For loose parts of the slurry, the lining should be
Set the amount of erosion.
7.2.3 For the specific parts of the contact with corrosive media, when the use of carbon steel lining non-metallic materials can not meet the actual use of
Time, should be based on the corrosive media and wear resistance, the use of high nickel-based alloy material.
7.2.4 absorption tower wall should use butyl rubber, glass scales as anti-corrosion wear-resistant lining. Lining material and construction should be
Meet GB 18241.1, GB 18241.4, HGJ229, HG/T 2640 requirements, when conditions permit, you can also use the high
Nickel-based alloy plate as anti-corrosion wear-resistant lining.
7.2.5 Absorption tower inlet (inlet flue gas condensate and slurry splash interface area) Flue, when made of carbon steel, the flue
The surface should be attached to the thickness of not less than 2mm high nickel-based alloy plate, and the projection projection length of not less than 1.5m.
7.2.6 absorption tower slurry circulation pump and discharge pump can be used all-alloy, steel lacquered rubber or engineering ceramic materials.
7.2.7 absorption tower stirrer should use anti-corrosion and anti-wear high nickel-based alloy material.
7.2.8 solid-liquid separation equipment and slurry contact with the components can be used alloy steel, butyl rubber, glass and other materials.
7.2.9 slurry pipeline should use lined rubber, lined with plastic pipe, duplex stainless steel pipe or glass pipe. Waste water and sludge
The pipe should be made of carbon steel lined with plastic pipe, duplex stainless steel pipe or lined pipe. among them.
A) When the lined pipe is selected, it shall meet the requirements of HG21501;
B) Selection of lined plastic pipe, should meet the requirements of HG20538;
C) When selecting fiberglass pipe, it shall meet HG/T 21633 requirements;
D) When selecting a duplex stainless steel pipe, it shall meet the requirements of GB/T 21833.
7.2.10 Absorbent tower demister should adopt polypropylene (PP) material.
7.2.11 slurry nozzle should adopt silicon carbide ceramic.
8 detection and process control
8.1 General provisions
8.1.1 Desulphurization device The level of automation control should be consistent with the level of automation control of the sintering machine.
8.1.2 desulfurization equipment should be centralized monitoring, the control room should be set to meet the requirements of GB 50174 should be able to finish in the control room
Into a desulfurization device to start, normal operating conditions monitoring and adjustment, shutdown and accident handling. Desulfurization device import and export of dioxygen
Sulfur concentration, import and export of flue gas humidity, import and export flue gas temperature, import and export flue gas flow, booster fan current, slurry
Circulating pump current, desulfurization tower slurry pH and other monitoring data should be access monitoring system.
8.1.3 desulfurization device should adopt DCS or PLC control system, its function includes data acquisition and processing (DAS), mold
(MCS), Sequential Control (SCS) and Interlock Protection, Desulphurization Unit Transformers and Desulphurization Power Systems
control. The controller should take redundancy.
8.1.4 Important process signals for control and protection, double or triple redundant settings shall be used. Baffle door on/off in place
Signal, desulfurization device original flue gas temperature, booster fan before the original smoke pressure, absorption tower level should be triple redundant settings; suction
The pH of the tower should be set with double redundancy.
8.1.5 desulfurization device can be set up separate industrial television monitoring system can also be unified into the sintering machine industrial television surveillance system
in. In all running high-voltage electrical equipment, ball mill, belt machine and other rotating equipment area should be set up TV monitoring points.
8.1.6 Desulfurization DCS or PLC control system should have historical data storage function, at least save more than one year desulfurization operation
Historical data, and can achieve access to the various parameters of the history curve in the same screen display, with the parameters of the range
Adjustable, adjustable time span and other functions.
8.2 Automatic control detection
8.2.1 Limestone/lime powder bin level measurement should adopt radar level meter or level switch.
8.2.2 slurry tank, tank level measurement should use ultrasonic level gauge or radar level gauge, level gauge should be equipped with anti-tank steam
Steam condensation measures. When measuring the level with a flange level transmitter, the Hastelloy (HC) diaphragm should be selected and
Equipped with a rinse device.
8.2.3 Liquid flow measurement Electromagnetic flowmeter, electromagnetic flowmeter for limestone or gypsum slurry flow measurement
Electrode should use HC material. Oxygen or compressed air flow measurement should use orifice flowmeter.
8.2.4 Flue gas temperature measurement should use armored wear-resistant thermal resistance.
8.3 Automatic control of the power supply
8.3.1 desulfurization device 220VAC automatic control power supply should be dual power supply, automatic switching, one of the way should be used to pay
Flow uninterruptible power supply (UPS).
8.3.2 electric actuators should adopt 380VAC or 220VAC power supply, power distribution cabinet (disk) should be set up two input power
Source, respectively, from the desulfurization power supply of different sections of the low voltage bus.
8.4 Communication systems
8.4.1 Desulphurization device The control system shall be provided with a hardwired and communication interface for signal exchange with the sintering machine control system.
When the sintering machine control system and desulfurization control system does not have the networking conditions, should be in the sintering control room does not have the operation
Authority of the desulfurization control system monitoring station.
8.4.2 When the sintering master has a three-level management information system (L3), the flue gas desulfurization and dispersion control system should be set accordingly
Of the communication interface.
Major auxiliary works
9.1 Electrical systems
9.1.1 Desulphurization unit The electrical system shall be controlled in the desulphurization control room and incorporated into the automatic control system.
9.1.2 desulfurization device high and low voltage voltage level should be consistent with the sintering machine main device.
9.1.3 Desulphurization equipment The neutral point grounding system should be consistent with the main unit of the sintering machine.
9.1.4 desulfurization device with high-voltage working power should be directly from the sintering machine high-pressure working bus on the lead; low-voltage working power should
Separate set of desulfurization low voltage transformer power supply, and in line with GB 50053 requirements.
9.1.5 desulfurization device with high-pressure load should be set up high-voltage busbar power supply, and set the distribution room for power distribution system should be set
GB 50052 requirements.
9.1.6 Desulphurization equipment The distribution room shall be arranged close to the power load center of the desulphurization unit, and an independent electric meter shall be provided.
9.1.7 Desulphurization device The cable design shall comply with the provisions of GB 50217.
9.1.8 The DC system should be set in accordance with DL/T 5044.
9.1.9 AC uninterruptible power supply (UPS) should adopt static inverter device; should be set separately UPS to the desulfurization device without power
Load powered.
9.2 Architecture and Structure
9.2.1 Desulphurization plant construction design should be based on process, use requirements, natural conditions, architectural terrain and other factors
The overall layout, and should be considered with the surrounding environment of the building to meet its functional requirements.
9.2.2 Desulphurization construction In addition to the provisions of this standard, it shall comply with the requirements of GB 50033, GB 50057,
GB 50222, GB Z1 and other requirements.
9.2.3 The anti-corrosion design of the building shall conform to the provisions of GB 50046.
9.2.4 The seismic fortification category of the building (structure) shall meet the requirements of GB 50223 and the seismic design shall meet the requirements of GB 50011
Claim. When calculating the seismic action, the representative value of the gravity load of the building (structure) should take the deadweight standard value and the variable load combination
The sum of the values of each variable load is given in Appendix C.
9.2.5 construction (structure) structure using steel structure, should meet the GB 50017 requirements.
9.2.6 Equipment load and pipe load acting on roof, floor (including) (including the weight of equipment and piping,
Equipment, pipes and containers filled with heavy) should be considered in full load, maintenance, construction and installation of the load should be considered live load,
The load should be in accordance with GB 50009.
9.3 Heating, ventilation and air conditioning
9.3.1 Desulphurization plant The building ventilation and air conditioning system shall be installed and constructed in accordance with GB 50019.
9.3.2 Desulphurization plant The heating of the building shall be the same as that of the sintering machine. When the factory has a centralized heating system
, The heating heat source should be concentrated by the sintering machine heating system. Desulphurization plant building winter heating indoor calculation temperature parameter
Test Appendix D.
9.3.3 Desulphurization device The building shall be made of non-dusty and corrosion-resistant radiator. When the radiator is installed,
Difficult, you can set the heater heating.
9.3.4 power distribution room, transformer room should not be set up water, steam heating, when the room temperature does not meet the requirements of equipment operation,
warm.
9.3.5 The heating facilities of the battery compartment shall be of the explosion type. The distance between the heating facility and the battery should be no less than
0.75m.
9.3.6 Desulphurization plant construction (structure) buildings should adopt natural ventilation, reasonable layout of the ventilation holes, to avoid air flow short circuit and down
Flow, reduce air dead ends.
9.3.7 The inlet of the ventilation system shall be located in a clean and dry place, and the cable sandwich shall not be used as a suction port for the ventilation system. in
Wind and sand larger areas, ventilation systems should take measures to prevent sand. Dust in a larger place, the ventilation system should take dust measures
Application On the coldest month average temperature below -10 ℃ in the region, the ventilation system into the exhaust vents should be considered frost measures.
9.3.8 desulphurization device Control room, electronic equipment, between the equipment, CEMS should be set up between the air conditioning device. air
Air conditioning interior design parameters Refer to Appendix E.
9.3.9 Transformer room, power distribution room, battery room should be set to remove the waste heat ventilation device. When the ventilation to remove the waste heat is not satisfied
When asked, should set the cooling facilities, and should set the accident ventilation.
9.3.10 Desulphurization device Where the motor power exceeds.200 kW, the ventilation device shall be provided to remove the waste heat. Ventilation device
Should use corrosion-resistant type.
9.4 Water supply and drainage
9.4.1 desulphurization device water supply and drainage design should meet the GB 50014, GB 50015 requirements.
9.4.2 In addition to meeting the requirements of GB 50015, the design of the production water supply system shall meet the following requirements.
A) should be preferred from the nearest sintering machine industrial water pipe lead to the process of water tank.
B) The amount of water in the process water supply system shall be calculated based on the amount of water used in the process system and the increase in the amount of incidental
After the calculation.
C) process of water chloride concentration should be less than 250mg/L; CODCr should be less than 280mg/L; BOD5 should be small
At 10mg/L; pH should not be less than 6.5, should not be greater than 9.5; suspended solids should be less than 100mg/L; rotating mechanical bearings
The hardness value in cooling water should be less than 250mg/L (in CaCO3).
9.4.3 In addition to meeting the requirements of GB 50015, the design of the domestic water supply system shall also meet the following requirements.
A) the new sintering machine desulfurization device life water supply system should be unified with the main plant design. Sintering machine has been built desulfurization
Reconstruction of the project life of water should be derived from the original life to the water pipe network.
B) desulfurization equipment staff living water should adopt 35L/(person/class), the hourly change coefficient can be 2.5
Select.
C) Under the premise of meeting the requirements and maintaining the normal operation of the water supply and drainage system, the domestic water supply system should be
Water - saving sanitary ware water supply accessories. Water supply parts should meet the requirements of product standards, and have a product certification.
9.4.4 In addition to meeting the requirements of GB 50015, the design of domestic sewage systems shall comply with the following provisions.
A) Determine whether the desulphurization unit is to set up the septic tank separately according to the location of the access pipe of the sewer network.
B) Domestic sewage should be connected to the main plant sewage pipe network.
C) Domestic sewage discharged into the urban sewage pipe network should be consistent with the provisions of CJ343.
9.4.5 In addition to meeting the requirements of GB 50014, the rainwater system design shall comply with the following requirements.
A) desulfurization device outdoor rain pipe should be connected to the sintering machine outdoor rain pipe network.
B) the use of external drainage system for roof rainwater; indoor drainage for areas where the coldest monthly average temperature is below -10 ° C
, If the drain through the electrical room, through the Department should take a fully enclosed type.
9.4.6 Design the life of desulphurization devices located in earthquakes, collapsible loess, slippery, permafrost and other special areas,
Fire water supply and drainage works, should implement the relevant special norms or regulations.
9.5 fire
9.5.1 The automatic fire alarm device shall be set up in the desulfurization unit and comply with the requirements of GB 50116. Automatic fire alarm equipment
Should be used in regional alarm system, and the fire alarm system should be linked with the main fire equipment.
9.5.2 desulfurization device should be set fire water supply system, should be from the sintering machine fire water supply system lead.
9.5.3 New sintering machine desulfurization device fire pipe network should be unified with the sintering machine design, outdoor fire hydrant should be with the sintering machine
Uniform arrangement; built sintering machine flue gas desulfurization renovation project in the outdoor fire hydrant should be set to meet the desulfurization device fire
Claim.
9.5.4 Desulphurization plant The fire hazard class and its fire rating and the design of the fire hydrant in the building
With the provisions of GB 50414.
9.5.5 fire extinguisher settings should also meet the provisions of GB 50414, GB 50140.
Labor safety......
Related standard:   HJ 2053-2018  HJ 2054-2018
   
 
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