CN115282741A - Integral skid-mounted membrane separation nitrogen production device - Google Patents

Integral skid-mounted membrane separation nitrogen production device Download PDF

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Publication number
CN115282741A
CN115282741A CN202210871930.9A CN202210871930A CN115282741A CN 115282741 A CN115282741 A CN 115282741A CN 202210871930 A CN202210871930 A CN 202210871930A CN 115282741 A CN115282741 A CN 115282741A
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nitrogen
membrane
skid
filter
gas
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CN202210871930.9A
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Inventor
梁运涛
王刚
邵旭东
冯文彬
李延富
何乃荣
耿世民
王启猛
陈为达
刘伟
杜晓林
王灵龙
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Shenyang Research Institute Co Ltd of CCTEG
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Shenyang Research Institute Co Ltd of CCTEG
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Priority to CN202210871930.9A priority Critical patent/CN115282741A/en
Publication of CN115282741A publication Critical patent/CN115282741A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/225Multiple stage diffusion
    • B01D53/227Multiple stage diffusion in parallel connexion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/228Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/04Purification or separation of nitrogen
    • C01B21/0405Purification or separation processes
    • C01B21/0433Physical processing only
    • C01B21/0438Physical processing only by making use of membranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D2053/221Devices
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0001Separation or purification processing
    • C01B2210/0009Physical processing
    • C01B2210/001Physical processing by making use of membranes

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention belongs to the technical field of underground coal mine fire prevention and extinguishing equipment, and particularly provides an integral skid-mounted membrane separation nitrogen making device. The skid-mounted membrane separation nitrogen production device mainly comprises a skid-mounted body, a gas source system, a nitrogen production system, a purification system, a heat dissipation system, a control system, a sewage discharge system and an illumination system; the skid-mounted body comprises a frame structure, a bottom plate, a top plate, side plates, an air suction opening, an air exhaust cover and a cooling system assembling frame. The integral skid-mounted membrane separation nitrogen making device integrates multiple sets of originally relatively independent equipment into one skid-mounted body, so that the carrying efficiency of the nitrogen making device is greatly improved; during the transportation process, the disassembly and assembly of equipment are avoided, the overall transportation efficiency and the deployment efficiency of the nitrogen making device are further improved, and meanwhile, the faults possibly caused by frequent disassembly and assembly of the device are avoided; when the equipment runs, one or more air compressors can be selectively started according to the actual nitrogen production quantity requirement, so that the energy consumption of the equipment is reduced.

Description

Integral skid-mounted membrane separation nitrogen making device
Technical Field
The invention belongs to the technical field of underground coal mine fire prevention and extinguishing equipment, and particularly provides an integral skid-mounted membrane separation nitrogen production device.
Background
The nitrogen generator is a device which takes air as a raw material and separates oxygen and nitrogen in the air by a physical method to obtain nitrogen. Nitrogen generators used in industry are classified into a cryogenic air separation method, a molecular sieve air separation method (PSA), and a membrane air separation method according to the separation method.
The membrane air separation nitrogen production device generally comprises an air source system (air compressor), a purification system, a nitrogen production system, a control system and the like. The whole device needs to be assembled on site in the application process, and the air compressor, the purification system, the membrane separation system, the finished product nitrogen pipeline and the like are connected by pipelines. When a part of areas are in danger, the danger cannot be controlled only by the nitrogen generator resident in the areas, and nitrogen generation equipment needs to be allocated and distributed from other areas. Each system component of current membrane separation nitrogen generator is independent separately, when actually transferring membrane separation nitrogen generator and carrying out transregional support fire prevention and extinguishing work, equipment field assembly work can consume a large amount of time, and this often can lead to missing the best opportunity of putting out a fire. Therefore, an integral membrane separation nitrogen-making device which is convenient to transport and can be used immediately after being plugged is urgently needed.
Disclosure of Invention
In order to solve the problems, the invention provides an integral skid-mounted membrane separation nitrogen production device.
In order to realize the purpose, the invention adopts the technical scheme that: an integral skid-mounted membrane separation nitrogen production device comprises a skid-mounted body, a gas source system, a nitrogen production system, a purification system, a heat dissipation system, a control system, a blowdown system and a lighting system, wherein the gas source system, the nitrogen production system, the purification system, the heat dissipation system, the control system and the lighting system are all assembled in the skid-mounted body, the gas source system, the heat dissipation system, the purification system and the nitrogen production system are sequentially connected through pipelines, and the gas source system, the heat dissipation system, the purification system, the nitrogen production system and the blowdown system are respectively and electrically connected with the control system;
the sled dress body includes frame construction, the bottom plate, the roof, the curb plate, the inlet scoop, the air exit, the lid of airing exhaust, cooling system assembly frame, frame construction is fixed to be assembled on the bottom plate, roof and curb plate embedded assembly respectively in frame construction's top and lateral part, the inlet scoop, air exit and cooling system assembly frame all set up on the curb plate, the lid lock of airing exhaust is in the outside of air exit, air supply system, nitrogen system, clean system, control system, the equal fixed mounting of exhaust system is on the surface of bottom plate, cooling system, lighting system assembles in the bottom plate, the roof, on the curb plate.
Further, the air source system comprises a first air compressor, a second air compressor, oil-gas separators, water separators and a control cabinet, wherein the oil-gas separators are assembled at the output ends of the first air compressor and the second air compressor, the output ends of the two oil-gas separators are connected with the input end of the heat dissipation system, the water separators are assembled at the output end of the heat dissipation system, the control cabinet is respectively electrically connected with the first air compressor and the second air compressor, and the first air compressor, the second air compressor, the oil-gas separators, the water separators and the control cabinet are fixedly installed on the surface of the bottom plate through supports.
Further, the nitrogen making system comprises a gas collecting pipe before the membrane, a hollow fiber membrane, a gas collecting pipe after the membrane, a nitrogen injecting pipe after the membrane, a pneumatic three-way valve and an output pipe opening, the output end of the purifying system is connected with the input end of the gas collecting pipe before the membrane, the gas collecting pipe before the membrane and the gas collecting pipe after the membrane are respectively connected with the two ends of the hollow fiber membrane, the nitrogen injecting pipe after the membrane is connected to the output end of the gas collecting pipe after the membrane, the pneumatic three-way valve is assembled at the tail end of the nitrogen injecting pipe after the membrane, the output pipe opening is connected with the output end of the pneumatic three-way valve, and the gas collecting pipe before the membrane, the hollow fiber membrane, the gas collecting pipe after the membrane and the nitrogen injecting pipe after the membrane are fixedly installed on the surface of the bottom plate through a support.
Further, the purification system comprises a gas-liquid separator, a filter, a freezing dryer, a precision filter, an activated carbon filter, an electric heater and a dust removal filter, wherein the output end of the gas source system is connected with the input end of the gas-liquid separator, the filter, the freezing dryer, the precision filter, the activated carbon filter, the electric heater and the dust removal filter are sequentially connected through pipelines, and the gas-liquid separator, the filter, the freezing dryer, the precision filter, the activated carbon filter, the electric heater and the dust removal filter are fixedly installed on the surface of the base plate through supports.
Furthermore, the heat dissipation system comprises cooler supports, cooling fans, an after cooler, an oil cooler and an exhaust fan, the two cooler supports are fixedly mounted on the side wall of the skid-mounted body, the two exhaust fans are respectively and fixedly mounted on the inner sides of the two air outlets, the after cooler and the oil cooler are spliced in parallel to form heat dissipation fins, the two heat dissipation fins are connected into the air source system in parallel, the two heat dissipation fins are respectively and fixedly mounted on the outer sides of the two cooler supports in an embedded mode, and the two groups of cooling fans are respectively and fixedly mounted on the inner sides of the two cooler supports.
Further, the control system comprises an electric control box, an inlet temperature sensor, a central temperature sensor, an outlet temperature sensor, a pre-membrane temperature sensor, a post-membrane pressure sensor, a nitrogen purity sensor and a nitrogen flow sensor, the electric control box is fixedly installed on the surface of the bottom plate, the air source system, the nitrogen production system, the purification system, the heat dissipation system, the inlet temperature sensor, the central temperature sensor, the outlet temperature sensor, the pre-membrane temperature sensor, the post-membrane pressure sensor, the nitrogen purity sensor and the nitrogen flow sensor are all electrically connected with the electric control box, the inlet temperature sensor, the central temperature sensor and the outlet temperature sensor are assembled in the purification system, the pre-membrane temperature sensor, the post-membrane pressure sensor and the nitrogen flow sensor are assembled in the nitrogen production system, the nitrogen purity sensor is assembled in the electric control box, and the nitrogen purity sensor is connected into the nitrogen production system through a hose.
Further, the blowdown system comprises a gas-liquid separator blowdown valve, a filter blowdown valve, a freezing type dryer blowdown valve, a precision filter blowdown valve, an active carbon filter blowdown valve, a dust removal filter blowdown valve and a centralized blowdown pipe, wherein the gas-liquid separator blowdown valve, the filter blowdown valve, the freezing type dryer blowdown valve, the precision filter blowdown valve, the active carbon filter blowdown valve and the dust removal filter blowdown valve are respectively arranged at the bottoms of the gas-liquid separator, the filter, the freezing type dryer, the precision filter, the active carbon filter and the dust removal filter, the centralized blowdown pipe is laid on the surface of the bottom plate, the gas-liquid separator blowdown valve, the filter blowdown valve, the freezing type dryer blowdown valve, the precision filter blowdown valve, the active carbon filter blowdown valve and the dust removal filter blowdown valve are respectively connected with the centralized blowdown pipe, and the tail end of the centralized blowdown pipe extends to the outside of the skid-mounted body.
Further, lighting system includes LED lamp area, LED controller, and LED lamp area lays on the inner wall of sled installation body, and LED controller fixed mounting is in sled installation body's outside, LED lamp area and LED controller electric connection.
Further, two pressure reducing valves are assembled on a pipeline of the nitrogen production system, the nitrogen purity sensor is connected with a hand-pulling valve through a hose, and the two pressure reducing valves are connected with the hand-pulling valve through hoses.
Furthermore, the bottom plate and the top plate are both made of integrally formed plates, the side plates are made of sandwich plates, each sandwich plate comprises a hollow plate and sandwich filler, and the sandwich filler is filled in an inner cavity of the hollow plate;
the curb plate includes fixed curb plate, regional curb plate of air supply, the regional curb plate of system nitrogen, door plant, and fixed curb plate fixed mounting is in one side of frame construction, and regional curb plate of air supply, the regional curb plate fixed mounting of system nitrogen in frame construction's opposite side, and the door plant articulates in frame construction's both ends, and air exit, cooling system assembly frame all set up in fixed curb plate surface.
The beneficial effects of the invention are as follows:
1. the integral skid-mounted membrane separation nitrogen making device integrates multiple sets of originally relatively independent equipment into one skid-mounted body, so that the skid-mounted nitrogen making device can be integrally transported through vehicles or rail transport equipment, and the transporting efficiency of the nitrogen making device is greatly improved;
2. during the transportation process, the disassembly and assembly of equipment are avoided, the overall transportation efficiency and the deployment efficiency of the nitrogen making device are further improved, and meanwhile, the faults possibly caused by frequent disassembly and assembly of the device are avoided;
3. the skid-mounted body can have a good protection effect on the nitrogen making device, and the overall reliability and safety of the device are improved;
4. when the integral skid-mounted membrane separation nitrogen making device runs, one or more air compressors can be selectively started according to the actual nitrogen making quantity requirement; when the nitrogen production quantity demand is less and the air intake demand can be met only by one air compressor, only one air compressor can be started to achieve the effect of reducing the energy consumption of equipment;
5. the integral skid-mounted membrane separation nitrogen production device adopts a plate type centralized heat exchange method of airflow unidirectional circulation, and solves the problems of internal heat dissipation, low heat dissipation efficiency and the like which possibly occur when a conventional air compressor is placed in a skid-mounted device;
6. cooling blower, exhaust fan carry out the regional heat dissipation work with nitrogen making region of air supply respectively, and independent inlet scoop has all been established in two regions, and the air current circulation route in two regions is parallel to each other, avoids the heat crisscross problem to appear among the heat transfer process, under the unchangeable prerequisite of fan power, relies on the overall arrangement further to improve heat exchange efficiency.
Drawings
FIG. 1 is a schematic external view of the present invention;
FIG. 2 is a schematic view of the skid-mounted body and the heat dissipation system of the present invention;
FIG. 3 is a schematic structural view of the inner skid assembly of the present invention;
FIG. 4 is a schematic view of the blowdown system, control system and piping of the present invention;
FIG. 5 is a schematic view of the structure of the side panel of the present invention;
FIG. 6 is a functional block diagram of the present invention;
FIG. 7 is a flow chart of the nitrogen generation process and the operation of the control system of the present invention.
The reference numerals include: 1-a skid-mounted body; 101-a frame structure; 102-a backplane; 103-a top plate; 104-side plate; 1041-fixed side plate; 1042-gas source area side plate; 1043-making nitrogen zone side plate; 1044-door panels; 105-an air suction opening; 106-air outlet; 107-exhaust cover; 108-heat dissipation system assembly frame; 109-hollow core slab; 110-interlayer filler; 2-a gas source system; 201-a first air compressor; 202-a second air compressor; 203-an oil-gas separator; 204-water separator; 205-a control cabinet; 3-a nitrogen production system; 301-membrane front header; 302-hollow fiber membranes; 303-a post-membrane collector; 304-a nitrogen injection tube behind the membrane; 305-a pneumatic three-way valve; 306-an output spout; 4-a purification system; 401-gas-liquid separator; 402-a filter; 403-freeze dryer; 404-a precision filter; 405-an activated carbon filter; 406-an electric heater; 407-a dust removal filter; 5-sealing the tank by inert gas nitrogen; 6-a heat dissipation system; 601-a cooler mount; 602-a cooling fan; 603-aftercooler; 604-an oil cooler; 605-exhaust fan; 7-a control system; 701-an electric control box; 702-an inlet temperature sensor; 703-a central temperature sensor; 704-an outlet temperature sensor; 705-temperature sensor before membrane; 706-pressure sensor behind membrane; 707-nitrogen purity sensor; 708-nitrogen flow sensor; 8-a blowdown system; 801-gas-liquid separator blowdown valve; 802-filter drain valve; 803-freeze dryer blowoff valve; 804-precision filter blowoff valve; 805-activated carbon filter blowoff valves; 806-dust filter blowoff valve; 807-centralized sewage draining pipe; 9-a lighting system; 901-an LED light strip; 902-an LED controller; 10-a pressure reducing valve; 11-hand pulling valve.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
Referring to fig. 1-7, an integral skid-mounted membrane separation nitrogen production device comprises a skid-mounted body 1, an air source system 2, a nitrogen production system 3, a purification system 4, a heat dissipation system 6, a control system 7, a sewage discharge system 8 and a lighting system 9, wherein the air source system 2, the nitrogen production system 3, the purification system 4, the heat dissipation system 6, the control system 7 and the lighting system 9 are all assembled in the skid-mounted body 1, the air source system 2, the heat dissipation system 6, the purification system 4 and the nitrogen production system 3 are sequentially connected through pipelines, and the air source system 2, the heat dissipation system 6, the purification system 4, the nitrogen production system 3 and the sewage discharge system 8 are respectively and electrically connected with the control system 7;
the skid-mounted body 1 comprises a frame structure 101, a bottom plate 102, a top plate 103, side plates 104, an air suction opening 105, an air exhaust opening 106, an air exhaust cover 107 and a heat dissipation system assembly frame 108, the frame structure 101 is fixedly assembled on the bottom plate 102, the top plate 103 and the side plates 104 are respectively assembled on the top and the side portions of the frame structure 101 in an embedded mode, the air suction opening 105, the air exhaust opening 106 and the heat dissipation system assembly frame 108 are all arranged on the side plates 104, the air exhaust cover 107 is buckled on the outer sides of the air exhaust opening 106, an air source system 2, a nitrogen making system 3, a purification system 4, a control system 7 and a pollution discharge system 8 are all fixedly installed on the surface of the bottom plate 102, the heat dissipation system 6, and an illumination system 9 is assembled on the bottom plate 102, the top plate 103 and the side plates 104.
The internal layout of the skid-mounted body 1 adopts a space isolation type design, and the internal space of the skid-mounted body is transversely divided into two parts, namely a gas source area and a nitrogen making area. Air supply system 2 arranges in the air supply region, and nitrogen system 3, clean system 4, control system 7 arrange in nitrogen system region, have both guaranteed air supply system 2 and nitrogen system 3 relative independence, have compromise the overall rationality again.
Preferably, the air suction opening 105 and the air exhaust cover 107 are designed by 180-degree adjustable shutters, so that the air suction speed can be conveniently adjusted by workers according to requirements.
Be equipped with inert gas nitrogen seal jar 5 in the sled installation body 1, inert gas nitrogen seal jar 5 is linked together with the pipeline of air supply system 2, nitrogen system 3, clean system 4, cooling system 6, and when equipment stopped operating, inert gas nitrogen seal jar 5 can regard as the nitrogen gas air supply, fills nitrogen gas in to each pipeline, avoids the pipeline oxidation.
The air source system 2 comprises a first air compressor 201, a second air compressor 202, an oil-gas separator 203, a water separator 204 and a control cabinet 205, the output ends of the first air compressor 201 and the second air compressor 202 are respectively provided with the oil-gas separator 203, the output ends of the two oil-gas separators 203 are respectively connected with the input end of the heat dissipation system 6, the water separator 204 is arranged at the output end of the heat dissipation system 6, the control cabinet 205 is respectively electrically connected with the first air compressor 201 and the second air compressor 202, and the first air compressor 201, the second air compressor 202, the oil-gas separator 203, the water separator 204 and the control cabinet 205 are fixedly arranged on the surface of the bottom plate 102 through a support.
Preferably, the water separator 204 employs a cyclone separator.
The air source system 2 is limited by the shape and the size of the skid-mounted body 1, and a single high-power air compressor cannot be arranged in the skid-mounted body. This design adopts two power total sum unchangeable miniwatt air compressor (miniwatt air compressor's quantity has and not only has two, and concrete quantity can make the adjustment according to power and space demand), implements subtend parallel assembly overall arrangement (air compressor's motor element width is less than compressor main part) to two air compressor, guarantees under the unchangeable prerequisite of total output, lets the equipment overall arrangement more nimble to in accord with the sled dress requirement of this design. The two sets of air compressors share one set of water separator 204 and the control cabinet 205, so that space is saved, and one or more air compressors can be selectively started according to the actual nitrogen production requirement; when the demand of nitrogen production is less and the air inlet demand can be achieved only by one air compressor, only one air compressor can be started, and the effect of reducing the energy consumption of equipment is achieved.
The purification system 4 comprises a gas-liquid separator 401, a filter 402, a freeze dryer 403, a precision filter 404, an activated carbon filter 405, an electric heater 406 and a dust removal filter 407, wherein the output end of the gas source system 2 is connected with the input end of the gas-liquid separator 401, the filter 402, the freeze dryer 403, the precision filter 404, the activated carbon filter 405, the electric heater 406 and the dust removal filter 407 are sequentially connected through a pipeline, and the gas-liquid separator 401, the filter 402, the freeze dryer 403, the precision filter 404, the activated carbon filter 405, the electric heater 406 and the dust removal filter 407 are all fixedly mounted on the surface of the base plate 102 through a bracket.
Preferably, the activated carbon filter 405 employs a high-efficiency activated carbon fiber filter instead of a conventional activated carbon degreaser. The traditional activated carbon degreaser is huge in size, complex in operation of replacing activated carbon and has the risk of membrane group pollution caused by activated carbon pulverization. The activated carbon fiber filter has smaller relative volume, can completely meet the space requirement of installation in the pry, is simpler and more convenient to replace the filter element, and cannot cause pollution to the membrane group.
The compressed air output by the air source system 2 is treated by the purification system 4, various impurities such as water and oil are filtered, the compressed air is heated to 50 ℃ by the electric heater 406, and the compressed air is finally subjected to dust removal treatment by the dust removal filter 407 and then output to the nitrogen making system 3.
The nitrogen making system 3 comprises a pre-membrane gas collecting pipe 301, a hollow fiber membrane 302, a post-membrane gas collecting pipe 303, a post-membrane nitrogen injection pipe 304, a pneumatic three-way valve 305 and an output pipe port 306, wherein the output end of a dust removal filter 407 is connected with the input end of the pre-membrane gas collecting pipe 301, the pre-membrane gas collecting pipe 301 and the post-membrane gas collecting pipe 303 are respectively connected to two ends of the hollow fiber membrane 302, the post-membrane nitrogen injection pipe 304 is connected to the output end of the post-membrane gas collecting pipe 303, the pneumatic three-way valve 305 is assembled at the tail end of the post-membrane nitrogen injection pipe 304, the output pipe port 306 is connected with the output end of the pneumatic three-way valve 305, and the pre-membrane gas collecting pipe 301, the hollow fiber membrane 302, the post-membrane gas collecting pipe 303 and the post-membrane nitrogen injection pipe 304 are fixedly installed on the surface of the base plate 102 through supports.
Preferably, the hollow fiber membrane 302 partial modules are in a vertical arrangement. Through steel frame construction, arrange the vertical array of a plurality of hollow fiber membrane 302 subassemblies, when improving the spatial layout controllability, reach effective utilization space, avoid the equipment appearance to mismatch the extravagant problem in space that leads to. A plurality of hollow fiber membranes 302 are simultaneously interposed in parallel relationship between the pre-membrane gas header 301 and the post-membrane gas header 303.
The nitrogen making system 3 inputs the clean compressed air purified by the purification system 4. The compressed air is divided by the pre-membrane gas collecting pipe 301 and input into each membrane group of the hollow fiber membrane 302 assembly for oxygen-nitrogen separation, the separated high-purity nitrogen is converged by the post-membrane gas collecting pipe 303 and is conveyed to the pneumatic three-way valve 305 by the post-membrane nitrogen injection pipe 304, and finally is connected with an external nitrogen injection pipeline by the output pipe port 306 at the tail end of the pneumatic three-way valve 305.
The heat dissipation system 6 comprises cooler supports 601, cooling fans 602, an after cooler 603, an oil cooler 604 and an exhaust fan 605, wherein the two cooler supports 601 are respectively and fixedly installed at the inner sides of the two heat dissipation system assembly frames 108, the two exhaust fans 605 are respectively and fixedly installed at the inner sides of the two air outlets 106, the after cooler 603 and the oil cooler 604 are spliced in parallel to form heat dissipation fins, the input ends of the two heat dissipation fins are respectively connected with the output ends of the two oil-gas separators 203, the output ends of the two heat dissipation fins are both connected with the input end of the water separator 204, the two heat dissipation fins are respectively and fixedly installed at the outer sides of the two cooler supports 601 in an embedded manner, and the two groups of cooling fans 602 are respectively and fixedly installed at the inner sides of the two cooler supports 601.
The heat dissipation fins formed by splicing the rear cooler 603 and the oil cooler 604 are flat plates, a compressed air source output by the air compressor is cooled through plate-type centralized heat exchange, the cooling fan 602 blows air to the heat dissipation fins from inside to outside, and airflow in the skid-mounted body 1 is guided outwards to form negative pressure while the heat of the heat dissipation fins is blown outwards in a directional mode; when the outer door panel 1044 of the skid-mounted body 1 is completely closed, cool air is sucked from the louvered exhaust inlets 105 at the side plates 1043 of the nitrogen making area and is exhausted from the two sides of the radiating fins and the assembly gaps under the drainage action of the cooling fan 602, so that a good airflow circulation is formed, and the heat of the radiating fins is ensured not to be diffused into the skid-mounted body 1;
the cooling fan 602 and the exhaust fan 605 respectively perform heat dissipation work in an air source region and a nitrogen making region, independent air suction ports 105 are arranged in the two regions, and airflow circulation paths of the two regions are parallel to each other, so that the problem of heat intersection in the heat exchange process is avoided.
The control system 7 comprises an electric control box 701, an inlet temperature sensor 702, a central temperature sensor 703, an outlet temperature sensor 704, a pre-film temperature sensor 705, a post-film pressure sensor 706, a nitrogen purity sensor 707 and a nitrogen flow sensor 708, wherein the electric control box 701 is fixedly installed on the surface of the base plate 102, the gas source system 2, the nitrogen generation system 3, the purification system 4, the heat dissipation system 6, the inlet temperature sensor 702, the central temperature sensor 703, the outlet temperature sensor 704, the pre-film temperature sensor 705, the post-film pressure sensor 706, the nitrogen purity sensor 707 and the nitrogen flow sensor 708 are electrically connected with the electric control box 701, the inlet temperature sensor 702 and the outlet temperature sensor 704 are respectively installed at the input end and the output end of the electric heater 406, the central temperature sensor 703 is installed inside the electric heater 406, the pre-film temperature sensor 705 and the post-film pressure sensor 706 are respectively installed at the pre-film gas collecting pipe 301 and the post-film gas collecting pipe 303, the nitrogen injection flow sensor 708 is installed at the middle part of the post-film nitrogen injection pipe 304, the nitrogen sensor 707 is installed inside the electric control box 701, the input end of the pre-film pipe 301 and the nitrogen injection pipe are connected with the nitrogen flow sensor 707 through a hose.
The central temperature sensor 703, the outlet temperature sensor 704 and the temperature sensor 705 before the membrane are used for collecting the central temperature of the electric heater 406, the outlet temperature of the electric heater 406 and the temperature parameters at the inlet of the membrane group, the temperature parameters are calculated by a PID algorithm, and the output power of the electric heater 406 is adjusted by a cycle wave controller and a solid state relay in real time according to a feedback calculation structure, so that the temperature of the compressed air input at the input end of the nitrogen making system 3 is kept constant at about 50 ℃;
the method comprises the steps that nitrogen purity data are collected through a nitrogen purity sensor 707, a PLC (programmable logic controller) controls a pneumatic three-way valve 305 to finish nitrogen injection or evacuation operation according to a set nitrogen purity parameter value in a system and the collected nitrogen purity data as judgment conditions (when the nitrogen purity is more than or equal to a set value, the PLC controls an electromagnetic valve to conduct a control gas circuit of the pneumatic three-way valve and drives the pneumatic three-way valve to be switched to a nitrogen injection pipeline conduction state, when the purity is less than the set value, the electromagnetic valve is not electrified, the pneumatic three-way valve is in an evacuation state at the moment), and meanwhile, the nitrogen purity parameter is displayed on a human-computer interface of an electric control box 701;
the pressure and flow parameters are collected by the pressure sensor 706 and the nitrogen flow sensor 708 after the membrane and are displayed on the human-computer interface of the electric control box 701 in a centralized manner. The collection requirements of the industry on various parameters are met, so that the user can conveniently count the data such as nitrogen injection amount, nitrogen injection time and the like. When the equipment needs to be overhauled, the reason of the equipment fault can be preliminarily judged according to the recently acquired pressure and flow parameters;
the blowdown system 8 comprises a gas-liquid separator blowdown valve 801, a filter blowdown valve 802, a freeze-dryer blowdown valve 803, a precision filter blowdown valve 804, an activated carbon filter blowdown valve 805, a dust removal filter blowdown valve 806 and a centralized blowdown pipe 807, wherein the gas-liquid separator blowdown valve 801, the filter blowdown valve 802, the freeze-dryer blowdown valve 803, the precision filter blowdown valve 804, the activated carbon filter blowdown valve 805 and the dust removal filter blowdown valve 806 are respectively arranged at the bottoms of the gas-liquid separator 401, the filter 402, the freeze-dryer 403, the precision filter 404, the activated carbon filter 405 and the dust removal filter 407, the centralized blowdown pipe 807 is laid on the surface of the bottom plate 102, the gas-liquid separator blowdown valve 801, the filter blowdown valve 802, the freeze-dryer blowdown valve 803, the precision filter blowdown valve 804, the activated carbon filter 805 and the dust removal filter 806 are respectively connected with the centralized blowdown pipe 807, and the tail end of the centralized blowdown pipe 807 extends to the outside of the skid-mounted body 1.
Preferably, each blowoff valve adopts an electromagnetic valve, each electromagnetic valve is electrically connected with the electric control box 701, and the PLC regularly opens each blowoff valve to perform blowoff according to time parameters set in the system.
The lighting system 9 comprises an LED lamp strip 901 and an LED controller 902, the LED lamp strip 901 is laid on the inner wall of the skid-mounted body 1, the LED controller 902 is fixedly mounted on the outer portion of the skid-mounted body 1, and the LED lamp strip 901 is electrically connected with the LED controller 902.
Preferably, the LED controller 902 is electrically connected to the electric control box 701, and the LED strip 901 can be controlled by a PLC controller according to system requirements, or manually controlled by the LED controller 902.
The front end of the membrane front gas collecting pipe 301 and the rear end of the membrane rear gas collecting pipe 303 are both provided with a pressure reducing valve 10, the nitrogen purity sensor 707 is connected with a hand-pulling valve 11 through a hose, and the two pressure reducing valves 10 are both connected with the hand-pulling valve 11 through hoses.
Preferably, the hand-pulled valve 11 is a two-position three-way hand-pulled valve. Two sampling points are arranged at the front end of the front membrane gas collecting pipe 301 and the rear end of the rear membrane gas collecting pipe 303, and the sampling points are connected with a hand-pulled valve 11 of a two-position three-way valve through a pressure reducing valve 10. Under the normal operation state of the equipment, a loop conducted by the gas path of the membrane gas collecting pipe 303, the hand-operated valve 11 and the nitrogen purity sensor 707 is opened, and the nitrogen purity after the membrane is continuously detected; however, under special conditions such as the maintenance state of the equipment, the hand-operated valve 11 is manually controlled to be switched to the gas path of the membrane front gas collecting pipe 301, the hand-operated valve 11 and the nitrogen purity sensor 707, and the fed back membrane front gas sample purity parameters can be used as equipment troubleshooting data.
The bottom plate 102 and the top plate 103 are both made of integrally formed plates, the side plates 104 are made of sandwich plates, each sandwich plate comprises a hollow plate 109 and sandwich filler 110, and the sandwich filler 110 is filled in an inner cavity of the hollow plate 109;
the side plates 104 include a fixed side plate 1041, an air source region side plate 1042, a nitrogen making region side plate 1043, and a door plate 1044, the fixed side plate 1041 is fixedly installed at one side of the frame structure 101, the air source region side plate 1042 and the nitrogen making region side plate 1043 are fixedly installed at the other side of the frame structure 101, the door plate 1044 is hinged at two ends of the frame structure 101, and the air outlets 106 and the cooling system assembling frame 108 are both arranged on the surface of the fixed side plate 1041.
The components of each system are fixed on the surface of the bottom plate 102 in a welding mode, and the pipeline is connected with an external flange;
preferably, the frame structure 101, the bottom plate 102 and the top plate 103 are made of steel plates with surfaces subjected to electroplating treatment, wherein the frame structure 101 is formed by pressure welding a plurality of groups of structural steel, and the processing technologies of the bottom plate 102 and the top plate 103 are integrally formed, so that the main body frame of the skid-mounted body 1 can bear full-flow equipment components and can bear external impact with certain strength;
preferably, the interlayer filler 110 needs to have good flame retardant effect, sound insulation effect and the characteristic of light self-weight of the material, and the interlayer filler 110 in the scheme adopts flame retardant soundproof cotton, and other materials with the above characteristics can be selected as the interlayer filler 110. The sandwich filler 110 is packaged in the pry body, so that the purpose of reducing the noise of equipment is achieved. Comprehensively considering: the upper space and the lower space of the underground environment are small, and the diffusion direction of sound is mainly in the horizontal direction; the bottom plate 102 and the top plate 103 need to play a role in bearing and strengthening the structural strength of the main frame of the prying body 1, and are not suitable for selecting factors such as manufacturing hollow clamping plates, and only the side plate 104 is manufactured by selecting sound-insulation flame-retardant clamping plates.
The integral skid-mounted membrane separation nitrogen production device adopts a 380V three-phase four-wire system power supply scheme.
The integral skid-mounted membrane separation nitrogen production device uses a plurality of low-power air compressors to replace a single high-power air compressor; the components of the original planar spatial layout are changed into a three-dimensional layout design; the method comprises the following steps of performing modular layout on a plurality of scattered units of nitrogen making machine equipment, unifying the maximum width and the maximum height of a three-dimensional space occupied by each module, forming a module embedding relation between each component and a pipeline, and enabling the space formed by splicing the components to be in a regular rectangle; the components are integrally fixed into the skid-mounted body 1 matched with the rectangular space occupied by the components, so that the full-flow skid-mounting of the nitrogen making device is realized, the skid-mounted nitrogen making device is convenient to integrally carry through vehicles or rail transport equipment, and the carrying efficiency of the nitrogen making device is greatly improved; during the transportation process, the disassembly and assembly of equipment are avoided, the overall transportation efficiency and the deployment efficiency of the nitrogen making device are further improved, and meanwhile, the faults possibly caused by frequent disassembly and assembly of the device are avoided; the skid-mounted body 1 can play a good protection effect on the nitrogen making device, and the overall reliability of the device is improved; one or more air compressors can be selectively started according to the actual nitrogen production requirement; when the demand of nitrogen production is less and the air intake demand can be achieved only by one air compressor, only one air compressor can be started to achieve the effect of reducing the energy consumption of equipment; the plate type centralized heat exchange method adopting airflow unidirectional circulation solves the problems of internal heat dissipation, low heat dissipation efficiency and the like of the conventional air compressor which is arranged in the skid-mounted device 1; cooling blower, exhaust fan carry out the regional heat dissipation work with nitrogen making region of air supply respectively, and independent inlet scoop has all been established in two regions, and the air current circulation route in two regions is parallel to each other, avoids the heat crisscross problem to appear among the heat transfer process, under the unchangeable prerequisite of fan power, relies on the overall arrangement further to improve heat exchange efficiency.
The foregoing is only a preferred embodiment of the present invention, and many variations in the detailed description and the application range can be made by those skilled in the art without departing from the spirit of the present invention, and all changes that fall within the protective scope of the invention are therefore considered to be within the scope of the invention.

Claims (10)

1. The utility model provides an integral sled dress formula membrane separation nitrogen generator which characterized in that: the skid-mounted nitrogen generating and purifying device comprises a skid-mounted body, a gas source system, a nitrogen generating system, a purifying system, a heat radiating system, a control system, a sewage discharging system and a lighting system, wherein the gas source system, the nitrogen generating system, the purifying system, the heat radiating system, the control system and the lighting system are all assembled in the skid-mounted body;
the sled dress body includes frame construction, the bottom plate, the roof, the curb plate, the inlet scoop, the air exit, the lid of airing exhaust, cooling system assembly frame, frame construction fixed assembly is on the bottom plate, roof and curb plate embedded assembly are respectively in frame construction's top and lateral part, the inlet scoop, air exit and cooling system assembly frame all set up on the curb plate, the lid of airing exhaust lock in the outside of air exit, air supply system, nitrogen system, clean system, control system, the equal fixed mounting of drainage in the surface of bottom plate, cooling system, lighting system assembles in the bottom plate, the roof, on the curb plate.
2. An integrated skid-mounted membrane separation nitrogen plant as set forth in claim 1, wherein: the air source system comprises a first air compressor, a second air compressor, an oil-gas separator, a water separator and a control cabinet, wherein the output ends of the first air compressor and the second air compressor are respectively provided with the oil-gas separator, the output ends of the two oil-gas separators are respectively connected with the input end of the heat dissipation system, the water separator is arranged at the output end of the heat dissipation system, the control cabinet is respectively electrically connected with the first air compressor and the second air compressor, and the first air compressor, the second air compressor, the oil-gas separator, the water separator and the control cabinet are fixedly arranged on the surface of the bottom plate through a support.
3. An integral skid-mounted membrane separation nitrogen plant as claimed in claim 1, wherein: the nitrogen making system comprises a gas collecting pipe before the membrane, a hollow fiber membrane, a gas collecting pipe after the membrane, a nitrogen injecting pipe after the membrane, a pneumatic three-way valve and an output pipe opening, wherein the output end of the purifying system is connected with the input end of the gas collecting pipe before the membrane, the gas collecting pipe before the membrane and the gas collecting pipe after the membrane are respectively connected with the two ends of the hollow fiber membrane, the nitrogen injecting pipe after the membrane is connected to the output end of the gas collecting pipe after the membrane, the pneumatic three-way valve is assembled at the tail end of the nitrogen injecting pipe after the membrane, the output pipe opening is connected with the output end of the pneumatic three-way valve, and the gas collecting pipe before the membrane, the hollow fiber membrane, the gas collecting pipe after the membrane and the nitrogen injecting pipe after the membrane are fixedly installed on the surface of the bottom plate through a support.
4. An integral skid-mounted membrane separation nitrogen plant as claimed in claim 1, wherein: the purification system comprises a gas-liquid separator, a filter, a freezing dryer, a precision filter, an activated carbon filter, an electric heater and a dust removal filter, wherein the output end of the gas source system is connected with the input end of the gas-liquid separator, the filter, the freezing dryer, the precision filter, the activated carbon filter, the electric heater and the dust removal filter are sequentially connected through pipelines, and the gas-liquid separator, the filter, the freezing dryer, the precision filter, the activated carbon filter, the electric heater and the dust removal filter are fixedly installed on the surface of the bottom plate through supports.
5. An integrated skid-mounted membrane separation nitrogen plant as set forth in claim 1, wherein: the heat dissipation system comprises cooler supports, cooling fans, an aftercooler, an oil cooler and exhaust fans, wherein the two cooler supports are fixedly mounted on the side wall of the skid-mounted body, the two exhaust fans are respectively and fixedly mounted on the inner sides of the two air outlets, the aftercooler and the oil cooler are spliced in parallel to form heat dissipation fins, the two heat dissipation fins are connected into the air source system in parallel, the two heat dissipation fins are respectively and fixedly mounted on the outer sides of the two cooler supports in an embedded mode, and the two groups of cooling fans are respectively and fixedly mounted on the inner sides of the two cooler supports.
6. An integral skid-mounted membrane separation nitrogen plant as claimed in claim 1, wherein: the control system comprises an electric control box, an inlet temperature sensor, a central temperature sensor, an outlet temperature sensor, a pre-membrane temperature sensor, a post-membrane pressure sensor, a nitrogen purity sensor and a nitrogen flow sensor, wherein the electric control box is fixedly installed on the surface of the bottom plate, an air source system, a nitrogen making system, a purification system, a heat dissipation system, the inlet temperature sensor, the central temperature sensor, the outlet temperature sensor, the pre-membrane temperature sensor, the post-membrane pressure sensor, the nitrogen purity sensor and the nitrogen flow sensor are all electrically connected with the electric control box, the inlet temperature sensor, the central temperature sensor and the outlet temperature sensor are assembled in the purification system, the pre-membrane temperature sensor, the post-membrane pressure sensor and the nitrogen flow sensor are assembled in the nitrogen making system, the nitrogen purity sensor is assembled in the electric control box, and the nitrogen purity sensor is connected into the nitrogen making system through a hose.
7. An integrated skid-mounted membrane separation nitrogen plant as set forth in claim 4, wherein: the blowdown system comprises a gas-liquid separator blowdown valve, a filter blowdown valve, a freezing dryer blowdown valve, a precision filter blowdown valve, an active carbon filter blowdown valve, a dust removal filter blowdown valve, a centralized blowdown pipe, the gas-liquid separator blowdown valve, the filter blowdown valve, the freezing dryer blowdown valve, the precision filter blowdown valve, the active carbon filter blowdown valve, the dust removal filter blowdown valve is arranged on the gas-liquid separator respectively, the filter, the freezing dryer, the precision filter, the active carbon filter and the bottom of the dust removal filter, the centralized blowdown pipe is laid on the surface of the bottom plate, the gas-liquid separator blowdown valve, the filter blowdown valve, the freezing dryer blowdown valve, the precision filter blowdown valve, the active carbon filter blowdown valve and the dust removal filter blowdown valve are connected with the centralized blowdown pipe respectively, and the tail end of the centralized blowdown pipe extends to the outside of the skid-mounted body.
8. An integral skid-mounted membrane separation nitrogen plant as claimed in claim 1, wherein: the lighting system comprises an LED lamp strip and an LED controller, the LED lamp strip is laid on the inner wall of the skid-mounted body, the LED controller is fixedly mounted outside the skid-mounted body, and the LED lamp strip is electrically connected with the LED controller.
9. An integrated skid-mounted membrane separation nitrogen plant as set forth in claim 6, wherein: two pressure reducing valves are assembled on a pipeline of the nitrogen production system, the nitrogen purity sensor is connected with a hand-pulling valve through a hose, and the two pressure reducing valves are connected with the hand-pulling valve through hoses.
10. An integrated skid-mounted membrane separation nitrogen plant as set forth in claim 1, wherein: the bottom plate and the top plate are both made of integrally formed plates, the side plates are made of sandwich plates, each sandwich plate comprises a hollow plate and sandwich filler, and the sandwich filler is filled in an inner cavity of the hollow plate;
the side plate comprises a fixed side plate, an air source area side plate, a nitrogen making area side plate and a door plate, the fixed side plate is fixedly installed on one side of the frame structure, the air source area side plate and the nitrogen making area side plate are fixedly installed on the other side of the frame structure, the door plate is hinged to two ends of the frame structure, and the air outlet and the cooling system assembling frame are both arranged on the surface of the fixed side plate.
CN202210871930.9A 2022-07-19 2022-07-19 Integral skid-mounted membrane separation nitrogen production device Pending CN115282741A (en)

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