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Technical specifications of flue gas limestone/limegypsum desulfurization project for iron and steel industry sintering machine
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HJ 2052-2016
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Standards related to: HJ 2052-2016
| Standard ID | HJ 2052-2016 (HJ2052-2016) | | Description (Translated English) | Technical specifications of flue gas limestone/limegypsum desulfurization project for iron and steel industry sintering machine | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z25 | | Word Count Estimation | 22,222 | | 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 w......
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