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GB 50195-2013: Design code for producer gas station
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Design code for producer gas station
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Basic data | Standard ID | GB 50195-2013 (GB50195-2013) | | Description (Translated English) | Design code for producer gas station | | Sector / Industry | National Standard | | Classification of Chinese Standard | P47 | | Classification of International Standard | 91.140.40 | | Word Count Estimation | 93,997 | | Older Standard (superseded by this standard) | GB 50195-1994 | | Quoted Standard | GB 50006; GB 50009; GB 50016; GB 50030; GB 50034; GB 50052; GB 50057; GB 50058; GB 50187; GB 50493; GB 150; GB 6222; GBZ 1; GB/T 1576; GB/T 9143 | | Regulation (derived from) | Bulletin of the Ministry of Housing and Urban No. 1602 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This standard applies to industrial enterprises in the construction, expansion and renovation of the pressure fixed bed furnace gas station and gas pipeline design. This specification does not apply to water gas stations and water gas pipeline design. | GB 50195-2013: Design code for producer gas station---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General
1.0.1 This specification is formulated in order to make the design of producer gas station (hereinafter referred to as gas station) ensure safe production, save energy, protect the environment, improve working conditions, achieve advanced technology and economical rationality.
1.0.2 This specification is applicable to the design of gas stations and gas pipelines for newly-built, expanded and reconstructed atmospheric fixed-bed producers in industrial enterprises. This specification does not apply to the design of water gas station and its water gas pipeline.
1.0.3 The extension and reconstruction of the gas station shall make full use of the original equipment, pipelines, buildings and structures.
1.0.4 The environmental protection facilities of the gas station must be designed, constructed and put into operation at the same time as the main project.
1.0.5 The discharge of harmful substances and the control of noise in the gas station shall comply with the current relevant national standards.
1.0.6 The design of the gas station and its gas pipelines shall not only comply with this specification, but also comply with the current relevant national standards.
2 terms
2.0.1 producer gas station
It is a general term for the production and auxiliary production facilities set up to continuously produce industrial gas by using coal and coke as raw materials and saturated air as gasification agent by using atmospheric pressure fixed bed gasifier.
2.0.2 Overhead bridge for coal (slag) conveyor
Belt conveyor corridors for transporting coal, coke or ash.
2.0.3 crasher and screen room
A room containing crushing or screening equipment for coal or coke.
2.0.4 coal receiving hopper
Coal storage hoppers in coal yards or in front of mechanized coal handling equipment.
2.0.5 fine coal
Coal with a particle size of less than 6mm.
2.0.6 mechanized transport transport by conveyor
Belt conveyor, multi-bucket elevator, scraper machine and hydraulic ash removal and other transportation methods.
2.0.7 Semi-mechanized transport transport by simple machine
Monorail electric hoist, single bucket elevator, electric traction trolley, rail trolley and simple coal transportation machinery and other transportation methods.
2.0.8 magnetic separator
Magnetic separation equipment, suspended magnetic separators, electromagnetic belt wheels, etc. installed on the coal transportation system.
2.0.9 small type gas station
A gas station with a gas design output less than or equal to 6000m3/h.
2.0.10 medium type gas station
A gas station whose designed output of gas is greater than 6000m3/h and less than 50 000m3/h.
2.0.11 Large type gas station
A gas station with a gas design output greater than or equal to 50,000m3/h.
2.0.12 common passage
Indoor operation and inspection often come and go.
2.0.13 main passage main passage
Main roads for equipment installation and maintenance transportation.
2.0.14 two-stage gasifier two stage gasifier
The gas generator with retort section is called "two-stage furnace" for short.
2.0.15 Equipment for gas purification
The general term for standpipe, cyclone dust collector, electrical filter, scrubber, indirect cooler, drip eliminator, etc.
2.0.16 Electrostatic precipitator
The general term for wet electric precipitator, electric tar remover and electrostatic precipitator.
2.0.17 Water knockout
Equipment for removing water droplets from gas.
2.0.18 bell type valve
A device for releasing gas or flue gas at the outlet of the gas generator.
2.0.19 non-return valve
A device that prevents the gas in the gas generator from flowing back into the air pipe.
2.0.20 Anti-explosion valve
When the gas explodes, after the diaphragm in the valve ruptures and releases the pressure, the valve cover will automatically close due to the action of the heavy hammer, which can play a safety role.
2.0.21 Bursting disc
The pressure relief diaphragm installed at the end of the air pipe and gas pipe.
2.0.22 Natural suction device draft ventilation equipment
It is a device for natural ventilation when the gas furnace is pressurized.
2.0.23 Drain water sea equipment
Equipment for removing condensed water in gas pipelines.
2.0.24 disc valve diskvalve
Disc valve for shutting off hot gas.
2.0.25 gas pipe compensator flexible section of gas pipe
A device for temperature change compensation on gas pipelines.
2.0.26 blanking plate
It is a blocking plate used for temporary partition or extension between flanges of gas equipment or pipelines.
2.0.27 side shoring
Installed before and after the flanges of gas equipment or pipelines, it is used for loading and unloading blind plates and supports for blind plate gaskets.
2.0.28 revolving gate valve
A rotary gate valve on a gas pipeline.
3 coal selection
3.0.1 The selection of gasification coal should make rational use of energy and save energy, meet the user's requirements for gas quality, and coordinate with safety production, economic benefits and environmental protection.
3.0.2 The selected gasification coal type should have its origin, element composition analysis and other technical index data and the corresponding gasification coal type supply agreement.
3.0.3 The technical indicators of the coal used for the gasification of the one-stage coal gasifier shall comply with the relevant provisions of the current national standard "Technical Conditions for Coal Used in Atmospheric Pressure Fixed Bed Gasification" GB/T 9143.
3.0.4 The technical indicators of the coal used for the gasification of the two-stage coal gasifier shall comply with the relevant provisions of the current national standard "Technical Conditions for Coal Used in the Gasification of Atmospheric Pressure Fixed Beds" GB/T 9143, and shall also comply with Table 3.0.4 regulations.
Table 3.0.4 Technical indicators of coal used for gasification of two-stage coal gasifier
3.0.5 Before the preliminary design, the gasification test report of the coal used shall be obtained. The main gasification indicators of coal should be determined comprehensively according to the selected coal gasifier type, coal type, particle size and other factors. For the coal used for gasification, its average gasification intensity index should be used; for the coal not used for gasification, the gasification test report and the gasification of similar coal used for gasification in the coal gasifier should be used. The indicators are determined.
4 Design Yield and Quality
4.0.1 The designed output of the gas station shall be determined according to the sum of the maximum hourly gas consumption of each gas user's workshop and the simultaneous use coefficient between workshops. The maximum hourly gas consumption of a gas user's workshop shall be determined according to the sum of the maximum hourly gas consumption of each gas-using equipment and the simultaneous use coefficient of each equipment.
4.0.2 The simultaneous use coefficient between gas user workshops and the simultaneous use coefficient between various equipments shall be determined after accounting according to the actual working conditions of enterprises of the same type.
4.0.3 The low calorific value of the producer gas in the first stage should meet the following requirements.
1 Anthracite system or coke system should not be less than 5000kJ/m3;
2 The bituminous coal system should not be less than 5650kJ/m3.
4.0.4 The calorific value of gas at the low level of the two-stage producer gas should meet the following requirements.
1 The gas in the upper section should not be less than 6700kJ/m3;
2 The gas in the lower section should not exceed 5440kJ/m3.
4.0.5 The gas temperature of the cold gas station should not be higher than 35°C after the washing tower or indirect cooler, and should not be higher than 45°C in summer.
4.0.6 Before using the gas equipment, the gas temperature of the bituminous coal gasified in the hot gas station should not be lower than 350°C.
4.0.7 The dust and tar content in the gas at the outlet of the cold gas station shall be determined according to the requirements of the user. When there is no requirement from the user, the following provisions should be complied with.
1 The sum of dust and tar content in the gas of anthracite system or coke system should not be greater than 50mg/m3;
2 The sum of the dust and tar content in the gas of the bituminous coal system should not be greater than 100mg/m3;
3 The sum of the dust and tar content in the gas of the two-stage furnace system should not be greater than 50mg/m3.
4.0.8 The selection of producer gas desulfurization process should be based on the use of producer gas, the treatment capacity and the hydrogen sulfide content in the gas, combined with the local environmental protection requirements and the allowable emission of sulfur oxides produced after the gas combustion reaction Factors such as standards shall be determined after comparing technical and economical plans.
4.0.9 The capacity of producer gas desulfurization equipment shall be determined according to the amount of gas to be treated and its corresponding hydrogen sulfide content.
4.0.10 The number of producer gas desulfurization equipment should be set so that the hydrogen sulfide content in the gas meets the design requirements.
5 station layout
5.0.1 The layout of the gas station area shall comply with the relevant provisions of the current national standard "Code for General Layout Design of Industrial Enterprises" GB 50187, and shall meet the following requirements.
1 The gas station area shall be located on the windward side of the annual minimum frequency wind direction of the main buildings and structures in the plant area;
2 The gas station should be close to the place where the gas load is relatively concentrated;
3 It should be convenient for the transportation and storage of coal, ash, fine coal, tar, tar residue and the treatment of circulating water;
4.If there is a boiler room on the side, it shall be convenient to share the storage and transportation facilities of coal and ash with the boiler room and the utilization of fine coal;
5 The expansion site should be reserved in a reasonable plan;
6 Green spaces should be set up.
5.0.2 For the layout of the factory building in the gas station area, the fire separation distance shall comply with the relevant provisions of the current national standard "Code for Fire Protection Design of Buildings" GB 50016.
5.0.3 The front of the main building of the gas station should be perpendicular to the wind direction with the maximum frequency in summer; the outdoor gas purification equipment should be arranged on the downwind side of the main building of the gas station at the maximum frequency wind direction in summer.
5.0.4 The gas exhaust machine room and the air blower room should be arranged separately from the main workshop of the gas station. The gas exhaust machine room and the air blower room of the small gas station can be arranged adjacent to the main workshop of the gas station.
5.0.5 Buildings and structures such as circulating water system, tar system and coal yard should be arranged on the downwind side of the maximum frequency wind direction in summer, such as the main building of the gas station, the gas exhaust machine room, and the air blower room, and should prevent cooling The impact of the water mist emitted by the tower on the surrounding environment.
5.0.6 The fire lanes in the gas station area shall comply with the relevant provisions of the current national standard "Code for Fire Protection Design of Buildings" GB 50016.
6 Device Selection
6.0.1 The setting of the spare number of gas generators should meet the following requirements.
1 For every 5 or less working units of the gas generator, one shall be set up as a backup;
2 When the user has continuous high-load production throughout the year, it is advisable to set up another 1 spare for every 4 or less;
3 When the gas generator is overhauled, if the gas user allows to reduce or stop supplying gas, the equipment may not be used.
6.0.2 The type selection of gas generator equipment should be determined according to the type of coal. When the cold gas station gasifies non-caking bituminous coal, weakly caking bituminous coal and old lignite, a two-stage furnace should be used.
6.0.3 The standpipe, cyclone dust collector and air cooler shall be arranged one-to-one with the gas generator respectively.
6.0.4 The ash and tar residue at the bottom of the standpipe should be removed by hydraulic power.
6.0.5 The setting of the waste heat boiler shall meet the pressure drop requirements of the process system, and shall be determined after technical and economic comparison.
6.0.6 The waste heat boiler shall be a fire-tube boiler.
6.0.7 The gas generator water jacket or steam drum with a pressure greater than or equal to 0.1MPa shall comply with the relevant provisions of the current national standard "Steel Pressure Vessel" GB 150.
6.0.8 The selection of electrical filter type should be determined according to the properties of tar and impurities in the gas; when the fluidity is poor and cannot be removed by self-flow, the electrical filter with flushing device should be used.
6.0.9 The quantity and capacity of electrical filters should be determined according to the designed output of the gas station, and should not be less than 2, and should not be used for equipment. In the tubular electrical filter, the actual flow velocity of the gas should not be greater than 0.8m/s; when one of them is cleaned or overhauled, the actual flow velocity of the gas should not be greater than 1.2m/s.
6.0.10 When the washing tower is centrally installed or arranged one-to-one with the electric filter, no equipment can be used; but when one of the equipment is cleaned or overhauled and the gas output of the gas station remains unchanged, other operating equipment should be able to ensure normal operation, to meet the requirements of gas purification and cooling.
6.0.11 The air flow rate of the air blower shall be determined according to the designed air demand of the gas station. The air pressure should be determined according to the sum of the gas pressure at the furnace outlet, the pressure loss in the furnace, and the pressure loss of the air piping system when the gas generator reaches the design output.
6.0.12 The gas flow rate of the gas discharge machine shall be determined according to the designed output of the gas station; the gas pressure shall be determined according to the gas user's requirements for gas pressure and the sum of the pressure loss of the gas pipeline system.
6.0.13 The air blower and gas blower should be adjusted by frequency conversion.
6.0.14 When centrifugal gas exhauster and air blower are used, the following requirements shall be met;
1 When a single machine is working, its flow margin should not be less than 10% of the calculated flow rate; its pressure margin should not be less than 20% of the calculated pressure; when working in parallel, it should be appropriately increased;
2 The pressure should be corrected according to the density of the medium under the working conditions, and the flow rate should be corrected according to the temperature and humidity of the medium under the working conditions, and the atmospheric pressure of the area where the gas station is located;
3 The number of parallel working units of air blower and gas exhauster should not exceed 3, and another set should be set up as a backup; when low-load adjustment is required to confirm that the economy is reasonable, an additional set of equipment with a smaller capacity can be added.
6.0.15 The drip eliminator should be arranged one-to-one with the gas exhaust machine.
6.0.16 In the two-stage furnace cooling gas station, indirect cooling should be adopted after the gas electric filter in the upper stage and after the gas quenching tower in the lower stage.
6.0.17 When the two-stage furnace cooling gas station adopts the high-temperature incineration method to treat the gas condensate water, the operating temperature of the incinerator should be higher than 1100°C. After the incinerator, a waste heat boiler or other heat energy recovery device should be installed.
7 Safety of equipment
7.0.1 Gas purification equipment and gas waste heat boilers shall be equipped with drain pipes and purge pipe joints; the installation position shall be such that the medium in the equipment can be blown clean; Install a release pipe on the high equipment or on the gas pipeline between the equipment.
7.0.2 Sampling nozzles should be installed on the connecting pipes of equipment and gas pipeline discharge pipes.
7.0.3 The diameter of the discharge pipe on gas equipment with a volume greater than or equal to 1m3 should not be less than 100mm; the diameter of the discharge pipe on gas equipment with a volume less than 1m3 should not be less than 50mm.
7.0.4 A burst valve must be installed on the electric filter.
7.0.5 A burst valve should be installed on the washing tower.
7.0.6 The installation of blasting valves shall meet the following requirements.
1 It should be installed in the weak part of the equipment or the part that is easily directly impacted by the blasting air wave;
2 When the clearance height from the ground is less than 2m, protective measures shall be provided;
3.The pressure relief port of the blasting valve should not be directly facing the doors and windows of the building, the road in the station area and other places where people pass by.
7.0.7 The material for the membrane of the blasting valve should be annealed industrial pure aluminum plate.
7.0.8 Standpipes and cyclone dust collectors shall be equipped with pressure relief water seals.
7.0.9 The effective height of the gas equipment water seal should not be less than the specifications in Table 7.0.9.
Table 7.0.9 Effective height of gas equipment water seal
Note. P is the maximum working pressure.
7.0.10 The maximum working pressure of the equipment behind the gas discharger shall be the sum of the maximum working pressure before the gas discharger and the maximum pressure boost of the gas discharger.
7.0.11 The effective height of the release water seal in the bell valve should be 50mm higher than the water column height of the maximum working pressure at the outlet of the gasifier.
7.0.12 The water seal of the gas equipment shall take measures to maintain its fixed water level.
7.0.13 Between the gas generator, gas purification equipment, gas exhauster and the gas pipeline, a device that can cut off the gas should be installed; when a blind plate is installed, a supporting iron for easy loading and unloading of the blind plate should be installed.
7.0.14 When the blasting valves, manholes, valves, blind plates, etc. installed on gas equipment and pipelines are higher than 2m from the operation floor or the ground, an operation platform shall be provided.
8 Process layout
8.0.1 Gasifiers should be arranged in a single row.
8.0.2 The number of floors and the height of the main building shall be determined according to the type of gasifier, the storage capacity of coal hoppers, the method of coal transportation and ash discharge, and the needs of operation, installation and maintenance.
8.0.3 The clear distance between equipment and between equipment and walls in the main workshop should be determined according to the needs of equipment operation, maintenance and transportation; when used as a general passage, the clear distance should not be less than 1.5m.
8.0.4 When the main factory building is a closed building, the outer wall of the ground floor shall be equipped with door openings or reserved installation holes according to the largest piece of equipment; The maximum weight of the overhaul parts on the floor, set up lifting facilities and reserve a place for installing and dismantling equipment.
8.0.5 On the connecting pipe between the coal gasifier gasified with bituminous coal and the standpipe or cyclone dust collector, facilities for eliminating dust accumulation in the pipe shall be installed.
8.0.6 Except for the vertical pipe and cyclone dust collector which can be arranged indoors for gas purification equipment, other equipment should be arranged outdoors.
8.0.7 The gas exhausters and air blowers of large and medium-sized gas stations should be arranged in separate rooms; the gas exhausters and air blowers of small gas stations can be arranged in the same room.
8.0.8 The gas blower and air blower shall be arranged in a single row.
8.0.9 In the gas exhaust machine room and air blower room, the clear distance between equipment and between equipment and walls should be 0.8m ~ 1.2m; when used as the main channel, it should not be less than 2m; when used as a general When passing through, it should comply with the provisions of Article 8.0.3 of this code.
8.0.10 The number of floors and floor height of the gas discharge machine room shall be determined according to the requirements of the equipment structure type, drain arrangement and equipment hoisting. When a single-storey factory building is adopted, the height of the operation floor shall not be less than 3.5m; when a double-storey factory building is adopted, the height of the ground floor shall not be less than 3m.
8.0.11 For the operating floor of the gas exhaust machine room and the air blower room, door openings or installation holes shall be set up on the outer wall according to the largest part of the equipment, and lifting facilities for the heaviest parts shall be installed and installation and disassembly parts shall be reserved. venue.
8.0.12 The air suction port of the air blower shall be arranged outdoors, and protective nets and facilities for preventing rain, dust and reducing noise shall be provided.
9 air duct
9.0.1 At the inlet air pipe of the gas generator, a rising rod or indicator valve, a natural suction device and a check valve should be installed; at the end of the main air pipe, a bursting membrane and a release pipe should be installed, and the release pipe should be connected to the outdoor.
9.0.2 The saturated air pipeline shall be equipped with an insulation layer, and a drainage device shall be installed at its lowest point.
9.0.3 Air pipes should be laid overhead.
10 Auxiliary facilities
10.0.1 The gas station shall be equipped with a laboratory, and its testing equipment shall be able to meet the needs of frequent testing items.
10.0.2 The gas station shall have a machine repair room and an electric repair room, and its maintenance equipment shall be set according to the needs of regular maintenance and minor repair of the electromechanical equipment and pipelines in the station. A small gas station may not have a machine repair room and an electric repair room.
10.0.3 Large-scale gas stations should be equipped with instrument maintenance rooms.
10.0.4 Gas safety protection facilities shall comply with the relevant provisions of the current national standard "Gas Safety Regulations for Industrial Enterprises" GB 6222.
11 Storage and transportation of coal and ash
11.0.1 Coal, ash and fine coal in large and medium-sized gas stations should be loaded, unloaded and transported by mechanization, and small-scale gas stations should be loaded, unloaded and transported by mechanization or semi-mechanization.
11.0.2 The coal yard of the gas station shall be determined according to the distance of the coal source, the balance of supply and the mode of transportation, etc., and shall comply with the following regulations.
1 For train and ship transportation, the amount of coal stored in the coal yard should be 10d ~ 30d of coal in the gas station;
2 For vehicle transportation, the coal storage in the coal yard should be 5d to 10d coal in the gas station;
3 When the factory has a centralized coal yard, the amount of coal stored in the coal yard of the gas station should be 1d to 3d of the amount of coal entering the furnace at the gas station;
4 In addition to setting up the storage site for the furnace coal in the coal yard, a storage site for the fine coal should be reserved as needed.
11.0.3 Open-pit coal yards should be compacted and drainage facilities should be installed, and block stone or concrete floors should be laid; in areas with regular continuous rainfall and snowfall, rain and snow prevention facilities should be installed in coal yards, and the coverage area should be based on The local meteorological conditions and the amount of coal needed to meet the normal operation of the gas station are determined.
11.0.4 The design operation time of each shift of the coal handling system equipment should not be greater than 6h.
11.0.5 The effective storage volume of the coal storage hopper of the mechanical coal gasifier should be determined according to the working shift system of coal transportation. When the gas generator is in continuous operation, the effective storage volume of the coal storage bucket should be in accordance with Table 11.0.5 Provisions.
Table 11.0.5 Effective storage capacity of coal storage hopper of gas generator
11.0.6 When the diameter of the gas generator is greater than 2m, the diameter of the release pipe for discharging leaked gas in the coal storage hopper shall not be less than 300mm; when the diameter of the gas generator is equal to or less than 2m, the diameter of the release pipe of the coal storage hopper shall Less than 150mm. The setting of the discharge pipe should be easy to clean.
11.0.7 The inclination angle of the side wall of the coal storage hopper and chute of the gasifier should not be less than 55°.
11.0.8 The coal transportation system should be equipped with screening and magnetic separation and facilities. When the particle size of the coal supplied is larger than the design requirement, a crusher should be installed. Magnetic separation facilities should be located in front of the crusher.
11.0.9 The storage and transportation system of the gas station shall be equipped with coal metering facilities.
11.0.10 The total storage capacity of the final coal hopper should not be less than the daily final coal production of the gas station. The inclination angle of the side wall of the fine coal hopper and its chute should not be less than 60°. Antifreeze facilities should be provided for the final coal hopper in severe cold area.
11.0.11 The total storage volume of the ash hopper should not be less than the daily ash discharge volume of the gas station. The inclination angle of the side wall of the ash hopper and its chute should not be less than 60°. The ash hopper in the severe cold area should be equipped with antifreeze facilities.
11.0.12 The exposed rotating part of the equipment transmission device in the coal transportation and slag discharge system shall be equipped with a safety shield; when the belt conveyor installed in the coal trestle has no safety shield, a When crossing the bridge, railings should be set on the side where the operator walks.
11.0.13 The coal storage seam of the main workshop shall be equipped with facilities to prevent operators from falling into the coal storage hopper, and shall also be equipped with facilities to prevent the accumulated water on the floor from flowing into the coal storage hopper.
11.0.14 When the belt conveyor is used to feed coal, above the coal storage hopper of the gas generator, measures shall be taken to prevent the fine coal from concentrating into the last coal storage hopper.
11.0.15 The inclination angle of the belt conveyor shall meet the following requirements.
1 When transporting lump coal, it should not be greater than 18°;
2 When transporting fine coal and ash, the angle should not be greater than 20°.
11.0.16 The coal transport trestle should be semi-closed or closed.
11.0.17 The channel of the coal trestle should meet the following requirements.
1 The clear width of the running channel should not be greater than 1m, and the clear width of the maintenance channel...
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