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HJ 2023-2012

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HJ 2023-2012English499 ASK Days<=4 Technical specifications of expanded granular sludge bed(EGSB)reactor for wastewater treatment Valid HJ 2023-2012
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Detail Information of HJ 2023-2012; HJ2023-2012
Description (Translated English): Technical specifications of expanded granular sludge bed(EGSB)reactor for wastewater treatment
Sector / Industry: Environmental Protection Industry Standard
Word Count Estimation: 19,185
Date of Issue: 12/24/2012
Date of Implementation: 3/1/2013
Quoted Standard: GB 3836; GB 12348; GB 12801; GB 50011; GB 50014; GB 50015; GB 50016; GB 50017; GB 50037; GB 50040; GB 50046; GB 50052; GB 50053; GB 50054; GB 50057; GB 50069; GB 50187; GB 50202; GB 50203; GB 50204; GB 50205; GB 50209; GB 50222; GB 50268; GB 50275; GB/T 1
Drafting Organization: China Environmental Protection Industry Association
Regulation (derived from): Ministry of Environmental Protection Notice 2012 No. 72
Summary: This standard specifies the process design of anaerobic expanded granular sludge bed reactor wastewater treatment engineering, testing and control, construction and acceptance, operation and maintenance of technical requirements. This standard applies to

HJ 2023-2012
Technical specifications of expanded granular sludge bed(EGSB)reactor for wastewater treatment
National Environmental Protection Standard of the People's Republic
Technical specification for wastewater treatment of anaerobic granular sludge expanded bed reactor
Technical specifications of expanded granular sludge bed(EGSB)
Reactor for wastewater treatment
Published on.2012-12-24
2013-3-1 implementation
Ministry of Environmental Protection released
Content
Foreword.ii
1 Scope..1
2 Normative references..1
3 Terms and definitions. 2
4 Design water quantity and design water quality 3
5 General requirements..4
6 Process Design..5
7 Detection and process control 11
8 Major auxiliary projects.12
9 Construction and acceptance..12
10 Operation and maintenance 15
Appendix A (Informative Appendix) Design Load Statistics for Actual Engineering EGSB Reactors.17
Foreword
Standardize anaerobics for the implementation of the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on Water Pollution Prevention
Construction and operation management of granular sludge expanded bed reactor wastewater treatment project, prevention and control of environmental pollution, protection of the environment and human health
Kang, the development of this standard.
This standard specifies the process design, testing and control, construction and acceptance, and operation of anaerobic granular sludge expanded bed reactor.
Technical requirements such as maintenance.
This standard is a guiding standard.
This standard is the first release.
This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection.
This standard is mainly drafted by. China Environmental Protection Industry Association, Tsinghua University, Beijing Municipal Academy of Environmental Sciences,
Shandong Shifang Environmental Energy Co., Ltd.
This standard was approved by the Ministry of Environmental Protection on December 24,.2012.
This standard has been implemented since March 1,.2013.
This standard is explained by the Ministry of Environmental Protection.
Technical specification for wastewater treatment of anaerobic granular sludge expanded bed reactor
1 Scope of application
This standard specifies the process design, detection and control, and construction of anaerobic granular sludge expanded bed reactor wastewater treatment project.
Technical requirements for acceptance, operation and maintenance.
This standard applies to the design, construction and operation of industrial organic wastewater engineering using anaerobic granular sludge expanded bed reactor.
Bank management can be used as the technical basis for environmental impact assessment, design, construction, acceptance and operation and management after completion.
The design, operation and the like of the internal circulation anaerobic reactor and the anaerobic fluidized bed reactor can be referred to this standard.
2 Normative references
The contents of this standard refer to the terms in the following documents. For undated references, the valid version applies to this
standard.
GB 3836 Electrical equipment for explosive gas atmosphere
GB 12348 Environmental noise emission standards for industrial enterprises
General rules for safety and health requirements of GB 12801 production process
GB 50011 seismic design code for buildings
GB 50014 Outdoor Drainage Design Code
GB 50015 Building Water Supply and Drainage Design Code
GB 50016 Building Design Fire Code
GB 50017 steel structure design specification
GB 50037 Building Ground Design Specification
GB 50040 power machine basic design specification
GB 50046 industrial building anti-corrosion design specification
GB 50052 design specification for power distribution system
GB 50053 10kV and below substation design specifications
GB 50054 Low Voltage Distribution Design Specification
GB 50057 lightning protection design code for buildings
GB 50069 Water supply and drainage engineering structure design specification
GB 50187 General Plan for Design of Industrial Enterprises
GB 50202 Code for construction quality acceptance of building foundation engineering
GB 50203 Masonry Construction Quality Acceptance Specification
GB 50204 Concrete Structure Engineering Construction Quality Acceptance Specification
GB 50205 Steel Structure Engineering Construction Quality Acceptance Specification
GB 50209 Construction Ground Engineering Construction Quality Acceptance Specification
GB 50222 Building interior decoration design fire protection specification
GB 50268 Water supply and drainage pipeline engineering construction and acceptance specifications
GB 50275 Compressor, fan, pump installation engineering construction and acceptance specifications
GB/T 18883 indoor air quality standard
GB J 19 Industrial enterprises heating, ventilation and air conditioning design specifications
GB J 22 Factory Mine Road Design Code
GB J 87 Industrial Enterprise Noise Control Design Specification
GBZ 1 industrial enterprise design hygiene standard
GBZ 2 workplace occupational exposure limit
CJJ 60 Urban Wastewater Treatment Plant Operation, Maintenance and Safety Technical Regulations
HGJ 212 metal welded structure wet gas cabinet construction and acceptance specification
HJ/T 91 Surface Water and Wastewater Monitoring Technical Specifications
JGJ 80 Safety Specifications for Construction Work Heights
NY/T 1220.1 Technical Specifications for Biogas Engineering Part 1. Process Design
NY/T 1220.2 Technical Specifications for Biogas Engineering Part 2. Gas Supply Design
Measures for Completion and Acceptance of Construction Projects (Engineering) (National Planning Commission (1990) No. 1215)
Measures for the Administration of Environmental Protection Acceptance for Completion of Construction Projects (Order of the State Environmental Protection Administration (2001) No. 13)
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1 anaerobic granular sludge expanded bed reactor expanded granular sludge blanket reactor (referred to as EGSB
reactor)
Refers to the combination of gas, liquid and solid three-phase separation zones in the bottom sludge zone and the middle and upper sections, through reflow and structural design.
The effluent reactor has a higher ascending flow rate in the reactor, and the granular sludge inside the reactor is in an expanded state of anaerobic reactor.
3.2 outer loop external the circle
Refers to a cycle that will be boosted by the power of the effluent from the top three-phase separator and mixed with the incoming water.
3.3 inner loop internal the circle
Refers to a cycle in which the effluent that has not passed through the top three-phase separator is boosted by power and mixed with the incoming water.
4 Design water quantity and design water quality
4.1 Design water quantity
4.1.1 The designed water volume shall be designed according to the actual wastewater flow measured at the total discharge of the plant or industrial park. Test method should be consistent
HJ/T 91 regulations.
4.1.2 The change of wastewater flow rate should be measured according to the characteristics of the process, and the flow coefficient of variation should be determined.
4.1.3 When the actual measurement data cannot be obtained, it can be determined by referring to the current national final water consumption conversion, or according to the same
The same scale is determined by the analogy of the existing plant drainage data.
4.1.4 Lifting pump house, grille well and grit chamber should be designed according to the highest daily maximum wastewater volume.
4.1.5 The design flow rate of the EGSB reactor and the water delivery facilities such as pumps and pipelines before and after the EGSB reactor should be at the highest level.
Mean time wastewater volume design.
4.2 Design water quality
4.2.1 The design water quality should be determined according to the actual measurement data of the industrial wastewater entering the wastewater treatment plant (station), and its determination method and
The data processing method shall comply with the provisions of HJ/T 91. When there is no actual measurement data, refer to the emission data analogy of similar factories.
determine.
4.2.2 The EGSB reactor water inlet shall meet the following conditions.
a) pH should be 6.0 ~ 8.0;
b) Normal temperature anaerobic temperature should be 20 °C ~ 25 °C, medium temperature anaerobic temperature should be 35 °C ~ 40 °C, high temperature anaerobic temperature
It should be 50 °C ~ 55 °C;
c) nutritional combination ratio COD. N. P should be 100 ~ 500. 5. 1;
d) the suspended matter content in the EGSB reactor inlet water should be less than.2000 mg/L;
e) the ammonia nitrogen concentration should be less than.2000 mg/L;
f) the sulfate concentration should be less than 1000 mg/L, the COD/SO42 - ratio should be greater than 10;
g) COD concentration should be greater than 1000 mg/L;
h) Strictly control the concentration of heavy metals, cyanides, phenols and other substances into the anaerobic reactor.
4.2.3 It is advisable to reduce the toxic substances in the influent (such as heavy metals, cyanides, phenols, etc.) by appropriately increasing the reflux ratio of the effluent.
The concentration that mitigates or eliminates its toxic effects.
4.2.4 If the water ingress requirements are not met, appropriate pretreatment measures should be used.
4.2.5 Pollutant removal rate
Refer to Table 1 for the removal of contaminants from the EGSB reactor.
Table 1 Removal rate of pollutants in EGSB reactor
Contaminant
Removal rate (%)
Chemical Oxygen Demand (COD) 5 Day Biochemical Oxygen Demand (BOD5) Suspended Matter (SS)
Easy degradation wastewater 70~90 60~80 30~50
Refractory wastewater 50~70 40~60 20~40
(Note. B/C>0.3 is easy to degrade wastewater; B/C<0.1 is difficult to degrade wastewater.)
5 General requirements
5.1 General provisions
5.1.1 EGSB reactor design should comply with the current national standards and technical specifications in addition to the implementation of this standard.
set.
5.1.2 Treatment of waste gas, waste water, solid waste and other pollutants generated during the construction and operation of wastewater treatment plants (station)
Regulation and discharge shall comply with the provisions of national environmental protection regulations and relevant standards, and shall not cause secondary pollution.
5.1.3 The design and construction of wastewater treatment plants (stations) shall adopt effective sound insulation, noise reduction, greening and other measures to reduce noise.
The noise and vibration control design shall comply with the provisions of GB J87 and GB 50040, and the environmental noise emission at the boundary shall comply with GB 12348.
It is stipulated that green belts should be built around the wastewater treatment plant (station) and have a certain protective distance.
The evaluation is determined.
5.1.4 The wastewater treatment plant (station) shall install an automatic pollutant monitoring system in accordance with national or local environmental protection management requirements.
5.1.5 Wastewater treatment plants (stations) shall set up standardized sewage outlets in accordance with relevant national and local regulations.
5.1.6 Occupational health and labor safety should be highly valued during the design, construction and operation of wastewater treatment plants (stations).
Execute the provisions of GBZ 1, GBZ 2 and GB 12801.
5.1.7 The EGSB reactor shall be equipped with safety measures such as protective railings and anti-skid ladders in accordance with relevant regulations, and shall be fireproof and explosion-proof.
And prevention work against heat stroke and anti-poisoning.
5.1.8 The EGSB reactor should be sealed to reduce the pollution of the odor to the surrounding environment. The odor concentration should be in accordance with GB/T 18883.
Provisions. The EGSB wastewater treatment plant (station) should be equipped with a centralized treatment facility for malodor, which can be chemical deodorization or biological deodorization.
5.2 Plant (station) site selection and general layout
5.2.1 The site and overall layout of the wastewater treatment plant (station) shall comply with the relevant provisions of GB 50014, and the general plan design shall comply with GB 50187.
Provisions.
5.2.2 The flood control standard of wastewater treatment plant (station) should not be lower than the urban flood control standard.
5.2.3 When the wastewater treatment plant (station) is constructed in phases, the overall layout and reserved space shall be carried out according to the scale of long-term treatment. Pipe network and
Underground structures should be built at one time.
5.2.4 All kinds of pipelines of wastewater treatment plant (station) should be arranged in an integrated manner to avoid mutual interference, easy to clear and maintain, and reasonably clothed
Set the override and vent line.
5.2.5 The vertical design of the treatment unit should make full use of the original terrain, as far as possible to achieve earthwork balance and reduce the number of wastewater upgrades.
number.
5.3 Project composition
5.3.1 Wastewater treatment plant (station) using EGSB reactor mainly consists of pretreatment, EGSB reactor, subsequent treatment, sludge
Storage, biogas purification and utilization system. Subsequent processing generally refers to aerobic treatment and this part is outside the scope of this specification.
5.3.2 EGSB wastewater treatment plant (station) auxiliary engineering includes. power supply and distribution, water supply and drainage, fire protection, HVAC, detection and control
Wait.
6 Process design
6.1 Process
The process flow that should be used in a wastewater treatment plant (station) using an EGSB reactor is shown in Figure 1.
Influent pretreatment discharge subsequent treatment
Biogas purification and utilization
EGSB
Sludge storage
Figure 1 process flow chart
6.2 Pretreatment
6.2.1 Pretreatment includes grid, grit chamber, sedimentation tank, conditioning tank and mixing heating tank or cooling measures.
Enter the EGSB reactor sink
Water grid
pH adjustment nutrient salt dosing
Legend. Optional process unit
Figure 2 Pretreatment process
6.2.2 Thick and fine grids should be provided as needed. The design of the grille shall comply with the provisions of GB 50014.
6.2.3 When dealing with more sand-containing wastewater such as slaughter and distiller's grains, a grit chamber should be provided. The design of the grit chamber should conform to GB 50014
Provisions.
6.2.4 When treating wastewater containing a large amount of suspended solids such as paper, starch, etc., a sedimentation tank shall be provided. The design of the sedimentation tank should be consistent
The provisions of GB 50014.
6.2.5 The adjustment tank should be set. The design of the conditioning tank should meet the following requirements.
a) The capacity of the adjustment tank should be determined according to the change curve of the wastewater flow; when there is no flow curve, the capacity of the adjustment tank should be
To meet the requirements of water quality and water equalization in the production drainage cycle, the residence time should be 6 h to 12 h; for batch production, wastewater
For intermittent discharge, the capacity of the adjustment tank should be set in 1~2 cycles;
b) the conditioning tank can also be used as a neutralization tank, and a nutrient salt replenishing device can also be provided therein;
c) The mixing facility should be set in the adjustment tank, and the power of the mixer should be 4 W/m3 pool capacity ~ 8 W/m3 pool capacity;
d) The slag removal device shall be installed at the outlet end of the adjustment tank, and the sand removal and sludge discharge device shall be installed at the bottom of the tank.
6.2.6 The pH adjustment and dosing device should be located in the dosing room and should be designed to meet the following requirements.
a) Adjust and control the pH in the EGSB reactor by adding alkaline or acidic materials. Alkaline substances can be used.
Na2CO3, NaHCO3, etc.; acidic substances may be selected from hydrochloric acid;
b) The chemical should have a certain storage capacity, the storage time of the acidic substance should be more than 7 days, and the storage time of the alkaline substance should be
15 d or more;
c) It is advisable to use a special solvent-dissolving tank and mixing equipment for the dissolution of the drug, and the metering pump should be used for automatic quantitative dosing;
d) The pH value should be adjusted in the adjustment tank by adding acidic or alkaline substances. The pH should be finely adjusted to adopt the pipeline mixer and
Add acid and alkali pump;
e) It is advisable to set up a drug dissolving and dosing device such as nutrient salt (nitrogen, phosphorus, etc.) in the dosing room.
6.2.7 If the temperature of the wastewater does not meet the design temperature requirements, a heating or cooling device shall be provided. The specific requirements are as follows.
a) heating method can use outside the pool heating and pool heating, the pool heating should use hot water circulation heating mode;
b) The heat exchanger selection shall be based on the characteristics of the wastewater, the temperature of the medium and the temperature of the outlet medium of the heat exchanger. Heat exchanger
The heat exchange area should be calculated according to the heat balance, and the calculation result should have a margin of 10% to 20%;
c) the heat demand of the heating device is calculated according to formula (1);
Dht QQQ = (1)
In the formula.
Qt--total heat demand, kJ/h;
Qh--heat required to heat the wastewater to the design temperature, kJ/h;
Qd - the amount of heat required to maintain the reactor temperature, kJ/h.
d) It is advisable to use cooling facilities such as cooling pools or cooling towers.
6.3 EGSB reactor
6.3.1 EGSB reactor composition
The EGSB reactor is mainly composed of water distribution device, three-phase separator, water collection device, circulation device, sludge device and gas.
The liquid separation device is composed.
The structure of the EGSB reactor is shown in Figure 3.
Three-phase separator
Three-phase separator (optional)
Sludge bed
Water
Biogas
Draining mud
Influent
Sludge bed
Gas-liquid separator
mixing
(optional)
Heating pool pressurization
Figure 3 Schematic diagram of EGSB reactor structure
6.3.2 EGSB reactor cell design
6.3.2.1 The volume of the EGSB reactor should be calculated by the volumetric load method and calculated according to formula (2).
SQV ×
×=
(2)
In the formula.
V--reactor effective volume, m3;
Q--EGSB reactor design flow, m3/d;
NV--volume load, kgCOD/(m3·d);
SO--Influent organic matter concentration, mgCOD/L.
6.3.2.2 The volumetric load of the reactor shall be determined by test or by reference to similar works. Refer to the appendix in the absence of relevant information.
The relevant content of A determines that the volumetric load of the EGSB reactor should be 10 kgCOD/(m3·d) to 30 kgCOD/(m3·d).
6.3.2.3 The number of EGSB reactors should not be less than two, and should be designed in parallel with flexible adjustment.
It also facilitates sludge cultivation and start-up.
6.3.2.4 The effective water depth of the EGSB reactor is preferably between 15 m and 24 m.
6.3.2.5 The rising flow rate of wastewater in the EGSB reactor is preferably between 3 m/h and 7 m/h.
6.3.2.6 The EGSB reactor should be cylindrical and the height to diameter ratio of the reactor should be between 3 and 8.
6.3.2.7 The building materials of the EGSB reactor shall meet the following requirements.
a) EGSB reactor should be made of stainless steel, carbon steel with anti-corrosion coating, or reinforced concrete structure;
b) Insulation materials for steel EGSB reactors are commonly used in polystyrene foam, polyurethane foam, glass wool
Cotton, foam concrete, expanded perlite, etc.
6.3.3 Water distribution device
6.3.3.1 The water distribution device should adopt a tube of porous cloth and multi-tube water distribution.
6.3.3.2 The flow rate of the water orifice of a tube of porous cloth shall be greater than 2 m/s, the diameter of the perforated pipe shall be greater than 100 mm, and the center distance of the water distribution pipe
The bottom of the reactor should be kept at a distance of 150 mm to 250 mm.
6.3.3.3 Multi-tube water supply The water distribution area for each water inlet is preferably 2 m2 to 4 m2.
6.3.4 Three-phase separator
6.3.4.1 It is advisable to use a one-piece or combined three-phase separator. The basic structure of the three-phase separator is shown in Figure 4.
Figure 4 Basic structure of the three-phase separator
6.3.4.2 Integral three-phase separator inclined plate angle range α is 55 ° ~ 60 °; split three-phase separator reflector and gap
The gap Z1 between the seams should be between 100 mm and.200 mm, and the spacing between the layers should be between 100 mm and.200 mm.
6.3.4.3 The EGSB reactor may be a single-stage three-phase separator or a two-stage three-phase separator.
6.3.4.4 When setting up a two-stage three-phase separator, the lower three-phase separator should be placed in the middle of the reactor, and the coverage area should be
50% to 70%, the upper three-phase separator should be placed in the upper part of the reactor.
6.3.4.5 The diameter of the outlet pipe shall be such as to extract biogas from the plenum.
6.3.4.6 When the wastewater contains protein, fat or a large amount of suspended solids, it is advisable to set the defoaming spray before the effluent collection device.
mouth.
6.3.4.7 Three-phase separators should be made of polypropylene (PP), carbon steel, stainless steel, etc.
Corrosion treatment.
6.3.5 effluent collection device
6.3.5.1 The effluent collection unit shall be located at the top of the EGSB reactor.
6.3.5.2 The cylindrical EGSB reactor effluent should be a radial multi-groove or polygonal trough effluent.
6.3.5.3 A triangular raft shall be added to the sump, the upper head of the raft shall be greater than 25 mm, and the water level shall be 1/2 of the triangular molar.
6.3.5.4 The outlet of the effluent should be less than 1.7 L/(s·m).
6.3.5.5 EGSB reactor inlet and outlet pipes should be made of polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PPR),
Stainless steel, high density polyethylene (HDPE) and other materials.
6.3.6 Circulation device
6.3.6.1 EGSB reactors are available in both external and internal circulation.
6.3.6.2 EGSB reactor external circulation and internal circulation are both achieved by pump pressure, and the reflux ratio is determined according to the rising flow rate.
The flow rate is calculated according to formula (3).
QQ back = ν (3)
In the formula.
Ν--reactor rise velocity, m/h;
Q--EGSB reactor inlet flow, m3/h;
Q back - EGSB reactor reflux flow, including internal reflux and external reflux, m3/h;
A--reactor surface area, m2.
6.3.6.3 The EGSB reactor external circulation water should be provided with a bypass pipe to the mixing heating pool.
6.3.6.4 EGSB reactor external circulation, internal circulation inlet point should be set on the raw water inlet pipe, together with the raw water
Enter the reactor.
6.3.7 Drainage device
6.3.7.1 The sludge yield of the EGSB reactor is 0.05 kg VSS/kg COD ~ 0.10 kg VSS/kg COD, and the sludge discharge frequency is appropriate.
Determined according to the sludge concentration distribution curve. Sampling ports should be set at different heights, and sludge distribution should be made according to the concentration of monitored sludge.
line.
6.3.7.2 The EGSB reactor should be gravity multi-point drainage, and the sludge discharge point should be located at the bottom of the sludge area.
6.3.7.3 The diameter of the drain pipe should be greater than 150 mm, and the bottom drain pipe can also serve as a vent pipe.
6.3.8 Gas-liquid separator
When setting up a two-stage three-phase separator, the top of the reactor should be equipped with a gas-liquid separator, and the gas-liquid separator and the three-phase separator pass.
The gas collecting pipes are connected.
6.4 Excess sludge
6.4.1 The EGSB reactor shall be provided with a sludge storage facility, which shall be used as inoculated sludge after standing drainage.
6.4.2 If storage is not considered, the sludge in the EGSB reactor should be combined with the excess sludge in the aerobic tank and dewatered together. Sludge
According to the provisions of GB 50014, the treated sludge should comply with the relevant national regulations.
6.5 Biogas purification and utilization
6.5.1 The biogas production of the EGSB reactor is calculated according to formula (4).
)( 0 η×−×= ea SSQQ (4)
In the formula.
Qa--biogas production, Nm3/d;
Q--influent flow, m3/d;
Η--biogas yield, Nm3/kgCOD, generally 0.45 Nm3/kgCOD~0.50 Nm3/kgCOD;
SO--influent organic matter concentration, mgCOD/L;
Se--the concentration of effluent organic matter, mgCOD/L.
6.5.2 Biogas purification mainly includes dehydration, desulfurization and biogas storage. The system composition is shown in Figure 5.
Use or burn biogas
Figure 5 Biogas purification system diagram
6.5.3 Biogas purification and utilization design shall comply with the relevant provisions of NY/T 1220.1, NY/T 1220.2 and GB 50016.
6.5.4 Biogas utilization should be dehydrated and desulfurized before entering the subsequent utilization device. Biogas dehydration, desulfurization design should be
Meet the relevant provisions of NY/T 1220.2.
6.5.5 Biogas storage can be used with low pressure wet gas storage cabinets, low pressure dry gas storage cabinets and high pressure gas storage cabinets. Gas storage cabinet and surrounding buildings
The object should have a certain safety fire distance. The volume of the gas storage tank should be determined according to the amount of biogas generated and the different utilization methods.
a) When biogas is used for civil anecdote, the volume of the gas storage tank is calculated according to 50%~60% of the daily gas production;
b) When biogas is used for boiler, power generation and part of civil use, the volume of the gas storage tank should be determined according to the biogas supply balance curve;
When there is no balance curve, the volume of the gas storage cabinet should not be less than 10% of the daily gas production.
6.5.6 A safety water seal or flame arrester should be installed on the output pipe of the biogas storage tank. Biogas utilization project should be equipped with internal combustion combustion
Do not discharge biogas at will.
6.5.7 If the natural gas standard is required after biogas purification, it should comply with relevant national standards.
6.5.8 The EGSB reactor with a daily biogas output of less than 1300 m3 should be used as a heat source for cooking, heating or anaerobic heat transfer.
EGSB reactors with a gas production of more than 1300 m3 should be used for power generation or as a heat source for cooking, heating or anaerobic heat transfer.
6.5.9 The boiler for biogas utilization should use a coal-fired gas dual-purpose boiler.
7 Detection and process control
7.1 Testing
7.1.1 The level gauge, liquid level switch and flow meter should be set in the adjustment tank. The large-scale wastewater treatment plant (station) should be added at the exit.
Learn the oxygen demand detector.
7.1.2 The temperature and pH value automatic detection device should be set at the outlet end of the adjustment tank. The detection value is used to control the temperature and the dosage of the medicament.
7.1.3 EGSB reactor should be equipped with online instruments such as pH meter, thermometer and sludge interface meter.
7.2 Process Control
7.2.1 Process control management system should have data collection, processing, control, management, storage of historical data for more than 1 year and safety
Full protection.
7.2.2 The degree of advancement of selected equipment should be determined in conjunction with project scale, operational management requirements, and project investment.
And maintain management level, select monitoring indicators and automation according to local conditions.
7.2.3 The EGSB reactor should share a set of PLC controllers with other reactors in the whole station. If necessary, it can be set in the EGSB reactor.
For field I/O modules, PLC controllers generally do not have an interface device.
7.2.4 When using complete sets of equipment, the control of the complete set of equipment should be in line with the control set by the EGSB wastewater treatment plant (station).
Hehe.
7.2.5 A separate control box should be installed near the key equipment, and there is a “manual/automatic” operation control switching function.
7.2.6 On-site inspection instruments shall have anti-corrosion, explosion-proof, anti-leakage, anti-fouling and self-cleaning functions.
8 main auxiliary projects
8.1 Electrical engineering design shall comply with the following requirements.
a) The electrical load of the process equipment shall be the secondary load; if it is unable to meet the dual power supply, a single power supply plus diesel shall be used.
Power supply mode of the generator set;
b) The voltage level of the high and low voltage electrical equipment shall be the same as the voltage level of the power supply system;
c) The main equipment of the central control room shall be equipped with an online uninterruptible power supply;
d) The grounding system should adopt a three-phase five-wire system;
e) The design of substation and low voltage distribution room shall comply with the provisions of GB 50053 and GB 50054;
f) The power supply and distribution system shall comply with the provisions of GB 50052;
g) The motor should give priority to the direct start mode. When it is calculated, it cannot meet the direct start voltage loss specified in the specification.
The buck start mode is considered when the condition is lost;
h) The metal casing of electrical equipment should be grounded or zero-protected, steel structure, exhaust pipe, exhaust pipe and iron bar, etc.
Metals should be connected equipotentially.
8.2 Anti-corrosion engineering design shall comply with the provisions of GB 50046.
8.3 The desulfurization dehydration zone is an explosion-proof zone. The electrical equipment and installation in this zone shall meet the explosion-proof requirements;
The lighting adopts explosion-proof lamps, and the test instruments installed in the room should reach the intrinsic safety explosion-proof level, and the self-control equipment reaches the explosion-proof level;
The pressurized equipment of the gas cabinet should meet the explosion-proof requirements, and the explosion-proof engineering design should meet the requirements of GB 50222 and GB 3836.
8.4 Seismic design shall comply with the provisions of GB 50011.
8.5 Steel structure shall comply with the provisions of GB 50017.
8.6 The structure of the structure shall comply with the provisions of GB 50069.
8.7 The design of the building shall comply with the provisions of GB 50037.
8.8 Fire and fire engineering design shall comply with the provisions of GB 50016.
8.9 Anaerobic reactor and biogas cabinet shall be designed according to the first-level lightning protection lightning protection device. The lightning protection design shall comply with the provisions of GB 50057.
8.10 The design of water supply engineering shall comply with the provisions of GB 50015.
8.11 Drainage engineering design shall comply with the provisions of GB 50014.
8.12 Heating and ventilation engineering design shall comply with the provisions of GB J19.
8.13 The engineering design of roads and greening in the plant area shall comply with the provisions of GB J22.
9 Construction and acceptance
9.1 General.
Related standard:   HJ 1009-2019  HJ 1015.1-2019
   
 
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