WO2022095500A1 - Biogas dual-membrane storage system for waste incineration power plant - Google Patents

Biogas dual-membrane storage system for waste incineration power plant Download PDF

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WO2022095500A1
WO2022095500A1 PCT/CN2021/106133 CN2021106133W WO2022095500A1 WO 2022095500 A1 WO2022095500 A1 WO 2022095500A1 CN 2021106133 W CN2021106133 W CN 2021106133W WO 2022095500 A1 WO2022095500 A1 WO 2022095500A1
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Prior art keywords
membrane
pressure regulating
biogas
gas
regulating chamber
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PCT/CN2021/106133
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French (fr)
Chinese (zh)
Inventor
丁鹏
刘万鹏
周钟银
袁洪涛
李聪
张泽驰
Original Assignee
深圳市深能环保东部有限公司
深圳市能源环保有限公司
深圳市深能环保城市环境服务有限公司
潮州深能环保有限公司
桂林市深能环保有限公司
武汉深能环保新沟垃圾发电有限公司
单县深能环保有限公司
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Publication of WO2022095500A1 publication Critical patent/WO2022095500A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17B—GAS-HOLDERS OF VARIABLE CAPACITY
    • F17B1/00—Gas-holders of variable capacity
    • F17B1/02—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17B—GAS-HOLDERS OF VARIABLE CAPACITY
    • F17B1/00—Gas-holders of variable capacity
    • F17B1/02—Details
    • F17B1/12—Gas admission or discharge arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17B—GAS-HOLDERS OF VARIABLE CAPACITY
    • F17B1/00—Gas-holders of variable capacity
    • F17B1/02—Details
    • F17B1/14—Safety devices, e.g. prevention of excess pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/306—Organic sulfur compounds, e.g. mercaptans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/406—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/20—Capture or disposal of greenhouse gases of methane

Definitions

  • the invention relates to a biogas storage system of a waste incineration plant, in particular to a biogas double-membrane storage system of a waste incineration power plant.
  • biogas Due to its flammable, explosive, and corrosive characteristics, biogas has high requirements for gas storage devices. In addition to anti-ultraviolet and anti-microbial functions, the double-membrane storage system can also effectively resist the corrosiveness of biogas gas. It has the characteristics of safety and durability, low cost and high utilization rate, and has been widely used in China. At present, the biogas produced by the anaerobic digestion of leachate in the waste incineration power plant is burned into the furnace to realize the effective utilization of resources. During the use of the double-membrane storage system, the odor generated by the surrounding environment due to the escape of biogas has seriously affected the environmental sanitation of the waste incineration plant, which makes people resist the impression of the incineration plant.
  • the biogas double-membrane storage system includes an explosion-proof fan, a check valve, a safety valve, a bottom membrane, an outer membrane, an inner membrane, an air intake pipe and a bottom plate, the bottom membrane is attached and fixed on the bottom plate, and the A closed gas storage space is formed between the bottom membrane and the inner membrane, a pressure regulating chamber is formed between the inner membrane and the outer membrane, and the biogas generated by the biogas digester enters the gas storage space through the intake pipe . Due to the particularity of the membrane material, it is inevitable that biogas will escape from the storage space through the membrane material to the surge chamber and then from the outer membrane to the atmosphere. serious.
  • the gas in the surge chamber When the gas inside the surge chamber is overpressured, the gas in the surge chamber is discharged through the safety valve to ensure that the system maintains a constant pressure state and the system is in a safe state.
  • the gas in the surge chamber is directly discharged into the atmosphere through a safety valve, which seriously affects the sanitation of the surrounding environment.
  • the present invention proposes a biogas double-membrane storage system for a waste incineration power plant. Due to the addition of a pressure regulating and exhausting device, when the gas pressure in the pressure regulating chamber is overpressured, the The pressure regulator is turned on, and the gas in the surge chamber enters the alkali scrubbing tower and the deodorizing spray tower in turn through the pipeline, and is discharged after treatment.
  • the biogas is discharged protectively through the pressure regulating and exhausting device, and will not be directly discharged into the atmosphere, which not only avoids the generation of peculiar smell, but also greatly improves the safety, effectively solving the existing technical problems.
  • a biogas double-membrane storage system for a waste incineration power plant includes an explosion-proof fan, a check valve, a safety valve, a bottom membrane, an outer membrane, an inner membrane, an air intake pipe and a bottom plate.
  • the bottom film is attached and fixed on the bottom plate, a closed air storage space is formed between the bottom film and the inner film, a pressure regulating chamber is formed between the inner film and the outer film, and the biogas tank generates
  • the biogas enters the gas storage space through the air inlet pipe, and is characterized in that a pressure regulating and exhausting device is added.
  • the pressure regulating and exhausting device sequentially includes a pressure regulator, an alkali washing tower, a deodorant A spray tower, a first connecting pipe connecting the pressure regulator and the pressure regulating chamber, and a second connecting pipe connecting the alkali washing tower and the deodorizing spray tower, and the pressure regulating device is connected to the The pressure regulating chamber is connected.
  • the pressure regulator is opened, and the gas in the pressure regulating chamber is discharged into the alkali scrubbing tower through the first connecting pipe, and then discharged through the second connecting pipe.
  • Deodorizing spray tower When the gas in the pressure regulating chamber is overpressured, the pressure regulator is opened, and the gas in the pressure regulating chamber is discharged into the alkali scrubbing tower through the first connecting pipe, and then discharged through the second connecting pipe.
  • the joints between the outer membrane, the bottom membrane and the bottom plate are sealed by water sealing, and the joints between the inner membrane, the bottom membrane and the bottom plate are sealed by water sealing .
  • the present invention proposes a biogas double-membrane storage system for a waste incineration power plant. Due to the addition of a pressure regulating and exhausting device, when the gas pressure in the pressure regulating chamber is overpressured, the pressure regulator of the pressure regulating and exhausting device is opened. , The gas from the surge chamber enters the alkali scrubbing tower and the deodorizing spray tower in turn through the pipeline, and is discharged after treatment. The biogas is discharged through the pressure regulating exhaust device for protection, and will not be directly discharged into the atmosphere, which not only avoids the generation of peculiar smell, but also greatly improves the safety.
  • FIG. 1 is a schematic structural diagram of an embodiment of the prior art.
  • FIG. 2 is a schematic structural diagram of an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of an embodiment of the prior art.
  • a biogas dual-membrane storage system for a waste incineration power plant includes an explosion-proof fan 1, a check valve 2, a safety valve 3, a bottom membrane 4, an outer membrane 5, an inner membrane 6, and an air intake pipe 7. and the bottom plate 8, the bottom film 4 is attached and fixed on the bottom plate 8, a closed air storage space 6.1 is formed between the bottom film 4 and the inner film 6, and the inner film 6 and the outer A pressure regulating chamber 5.1 is formed between the membranes 5, and the biogas generated by the biogas digester enters the gas storage space 6.1 through the air intake pipe 7.
  • FIG. 2 is a schematic structural diagram of an embodiment of the present invention.
  • a biogas double-membrane storage system for a waste incineration power plant includes an explosion-proof fan 1, a check valve 2, a safety valve 3, a bottom membrane 4, an outer membrane 5, an inner membrane 6, an air intake pipe 7 and Bottom plate 8, the bottom film 4 is attached and fixed on the bottom plate 8, a closed air storage space 6.1 is formed between the bottom film 4 and the inner film 6, the inner film 6 and the outer film A pressure regulating chamber 5.1 is formed between 5, and the biogas generated by the biogas digester enters the gas storage space 6.1 through the intake pipe 7.
  • the pressure regulating and exhausting device includes a pressure regulator 9, an alkali washing tower 10, a deodorization device in sequence.
  • the pressure regulator 9 When the pressure regulating chamber 5.1 is overpressured, the pressure regulator 9 is opened, and the gas in the pressure regulating chamber 5.1 is discharged into the alkali scrubbing tower through the first connecting pipe 9.1 10, and then discharged into the deodorizing spray tower 11 through the second connecting pipeline 10.1.
  • the safety valve 3 only plays a double protection role.
  • the present invention suggests that the gas pressure in the surge chamber 5.1 can be controlled within the range of 1000-2000 Kpa.
  • the present invention suggests that sodium hydroxide and sodium hypochlorite are used as the circulating liquid in the inner tower of the alkali washing tower 10, and the pH of the circulating liquid is controlled to be 12-14.
  • the purification efficiency can reach more than 95%.
  • the circulating liquid of the deodorizing spray tower 11 adopts an aromatic deodorant, which can efficiently remove the residual part in the gas after the alkali washing, and the discharged gas has an aromatic effect and has the effect of beautifying the environment.
  • the explosion-proof fan 1 can be controlled by frequency conversion. By adjusting the frequency of explosion-proof fan 1, the ventilation air volume in the surge chamber can be changed, so that the gas flow in the surge chamber has fluidity, and the safety performance of the double-membrane storage system is improved.
  • the pressure regulator 9 of the pressure regulating and exhausting device is opened, and the gas in the pressure regulating chamber 5.1 enters the alkali scrubbing tower 10 through the pipeline in turn, removes the The smelly spray tower 11 is discharged after treatment.
  • the biogas is discharged through the pressure regulating exhaust device for protection, and will not be directly discharged into the atmosphere, which not only avoids the generation of peculiar smell, but also greatly improves the safety.
  • FIG. 3 is a schematic structural diagram of another embodiment of the present invention.
  • the figure shows that, in this example, the joints between the outer membrane 5, the bottom membrane 4 and the bottom plate 8 are sealed by water seals 12.21, 12.22, the inner membrane 6, the bottom membrane 4 and the bottom plate 8 are sealed The joints between are sealed by water seals 12.11, 12.12. Water sealing can further improve the sealing effect.
  • the present invention suggests that the height of the water seal can reach 200mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
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  • Treating Waste Gases (AREA)

Abstract

A biogas dual-membrane storage system for a waste incineration power plant. The system comprises an explosion-proof fan (1), a check valve (2), a safety valve (3), a bottom membrane (4), an outer membrane (5), an inner membrane (6), a gas intake pipe (7) and a bottom plate (8), wherein the bottom membrane (4) is attached and fixed to the bottom plate (8), a closed gas storage space (6.1) is formed between the bottom membrane (4) and the inner membrane (6), a pressure regulating chamber (5.1) is formed between the inner membrane (6) and the outer membrane (5), and biogas generated by a biogas digester enters the gas storage space (6.1) by means of the gas intake pipe (7). Since a pressure regulating exhaust device is additionally arranged, when the pressure intensity of gas in the pressure regulating chamber (5.1) experiences overpressure, a pressure regulator (9) of the pressure regulating exhaust device is opened, and gas in the pressure regulating chamber (5.1) sequentially enters an alkali washing tower (10) and a deodorizing spray tower (11) by means of a pipeline for treatment, and then is discharged and is not directly discharged into the atmosphere, such that peculiar smell is prevented from being generated in the surrounding environment, system safety is further ensured, and the problems in the prior art are effectively solved.

Description

一种垃圾焚烧发电厂沼气双膜储存系统A biogas double-membrane storage system for waste incineration power plants 技术领域technical field
本发明涉及一种垃圾焚烧厂沼气储存系统，尤其涉及一种垃圾焚烧发电厂沼气双膜储存系统。The invention relates to a biogas storage system of a waste incineration plant, in particular to a biogas double-membrane storage system of a waste incineration power plant.
背景技术Background technique
沼气由于其易燃易爆、腐蚀性强等特点，对贮气储气装置有很高的要求。双膜储存系统除了具有抗紫外线、抗微生物功能，还能有效抵制沼气气体的腐蚀性，具有安全耐用、造价低及利用率高的特点，在国内得到了得到了越来越广泛的应用。目前垃圾焚烧发电厂对渗滤液厌氧消化产生的沼气进行入炉燃烧，实现资源的有效利用。在双膜储存系统的使用过程中，由于沼气的逸散使周围环境产生的气味严重影响了垃圾焚烧厂的环境卫生，使人们对焚烧厂的印象产生了抵触情绪。Due to its flammable, explosive, and corrosive characteristics, biogas has high requirements for gas storage devices. In addition to anti-ultraviolet and anti-microbial functions, the double-membrane storage system can also effectively resist the corrosiveness of biogas gas. It has the characteristics of safety and durability, low cost and high utilization rate, and has been widely used in China. At present, the biogas produced by the anaerobic digestion of leachate in the waste incineration power plant is burned into the furnace to realize the effective utilization of resources. During the use of the double-membrane storage system, the odor generated by the surrounding environment due to the escape of biogas has seriously affected the environmental sanitation of the waste incineration plant, which makes people resist the impression of the incineration plant.
现有技术中，沼气双膜储存系统包括防爆风机、逆止阀、安全阀、底膜、外膜、内膜，进气管及底板，所述底膜贴合固定在所述底板上，所述底膜与所述内膜之间构成一个密闭的储气空间，所述内膜与所述外膜之间构成一个调压室，沼气池产生的沼气经所述进气管进入所述储气空间。由于膜材质的特殊性，不可避免会出现沼气从储存空间透过膜材逸散至调压室进而从外膜逸散到大气，这种现象随着调压室气体压强的上升而越来越严重。当调压室内部的气体超压时，调压室内气体通过安全阀排出，确保系统保持恒压状态，使系统处于安全状态。现有技术中，当调压室内部的气体超压时，调压室内气体通过安全阀直接排向大气中，严重影响周围环境卫生。In the prior art, the biogas double-membrane storage system includes an explosion-proof fan, a check valve, a safety valve, a bottom membrane, an outer membrane, an inner membrane, an air intake pipe and a bottom plate, the bottom membrane is attached and fixed on the bottom plate, and the A closed gas storage space is formed between the bottom membrane and the inner membrane, a pressure regulating chamber is formed between the inner membrane and the outer membrane, and the biogas generated by the biogas digester enters the gas storage space through the intake pipe . Due to the particularity of the membrane material, it is inevitable that biogas will escape from the storage space through the membrane material to the surge chamber and then from the outer membrane to the atmosphere. serious. When the gas inside the surge chamber is overpressured, the gas in the surge chamber is discharged through the safety valve to ensure that the system maintains a constant pressure state and the system is in a safe state. In the prior art, when the gas inside the surge chamber is overpressured, the gas in the surge chamber is directly discharged into the atmosphere through a safety valve, which seriously affects the sanitation of the surrounding environment.
发明内容SUMMARY OF THE INVENTION
为了克服现有技术中存在的问题，本发明提出一种垃圾焚烧发电厂沼气双膜储存系统，由于增设调压排气装置，当调压室的气体压强超压时，调压排气装置的压力调节器打开，调压室的气体经管道依次进入碱洗涤塔、除臭喷淋塔，经过处理后排放，优于国家恶臭污染物排放一级标准，感官无异味，确保环境卫生。沼气经调压排气装置进行保护性排放，不会直接排入大气，不仅避免产生异味，而且安全性也大大提高，有效地解决现有技术问题。In order to overcome the problems existing in the prior art, the present invention proposes a biogas double-membrane storage system for a waste incineration power plant. Due to the addition of a pressure regulating and exhausting device, when the gas pressure in the pressure regulating chamber is overpressured, the The pressure regulator is turned on, and the gas in the surge chamber enters the alkali scrubbing tower and the deodorizing spray tower in turn through the pipeline, and is discharged after treatment. The biogas is discharged protectively through the pressure regulating and exhausting device, and will not be directly discharged into the atmosphere, which not only avoids the generation of peculiar smell, but also greatly improves the safety, effectively solving the existing technical problems.
本发明解决技术问题采用的技术方案是，一种垃圾焚烧发电厂沼气双膜储存系统，包括防爆风机、逆止阀、安全阀、底膜、外膜、内膜、进气管及底板，所述底膜贴合固定在所述底板上，所述底膜与所述内膜之间构成一个密闭的储气空间，所述内膜与所述外膜之间构成一个调压室，沼气池产生的沼气经所述进气管进入所述储气空间，其特征是，还增设一个调压排气装置，依据气体流动方向所述调压排气装置依次包括压力调节器、碱洗涤塔、除臭喷淋塔，以及连接压力调节器与所述调压室的第一连接管道和连接碱洗涤塔与除臭喷淋塔的第二连接管道，调压装置经所述第一连接管道与所述调压室连接，所述调压室的气体超压时，所述压力调节器打开，所述调压室的气体经第一连接管道排入碱洗涤塔，然后再经第二连接管道排入除臭喷淋塔。The technical solution adopted by the present invention to solve the technical problem is that a biogas double-membrane storage system for a waste incineration power plant includes an explosion-proof fan, a check valve, a safety valve, a bottom membrane, an outer membrane, an inner membrane, an air intake pipe and a bottom plate. The bottom film is attached and fixed on the bottom plate, a closed air storage space is formed between the bottom film and the inner film, a pressure regulating chamber is formed between the inner film and the outer film, and the biogas tank generates The biogas enters the gas storage space through the air inlet pipe, and is characterized in that a pressure regulating and exhausting device is added. According to the gas flow direction, the pressure regulating and exhausting device sequentially includes a pressure regulator, an alkali washing tower, a deodorant A spray tower, a first connecting pipe connecting the pressure regulator and the pressure regulating chamber, and a second connecting pipe connecting the alkali washing tower and the deodorizing spray tower, and the pressure regulating device is connected to the The pressure regulating chamber is connected. When the gas in the pressure regulating chamber is overpressured, the pressure regulator is opened, and the gas in the pressure regulating chamber is discharged into the alkali scrubbing tower through the first connecting pipe, and then discharged through the second connecting pipe. Deodorizing spray tower.
优选的，所述外膜、所述底膜与所述底板之间的接合处通过水密封进行密封，所述内膜、所述底膜与 所述底板之间的接合处通过水密封进行密封。Preferably, the joints between the outer membrane, the bottom membrane and the bottom plate are sealed by water sealing, and the joints between the inner membrane, the bottom membrane and the bottom plate are sealed by water sealing .
本发明的效果是：本发明提出一种垃圾焚烧发电厂沼气双膜储存系统，由于增设调压排气装置，当调压室的气体压强超压时，调压排气装置的压力调节器打开，调压室的气体经管道依次进入碱洗涤塔、除臭喷淋塔，经过处理后排放，排放优于国家恶臭污染物排放一级标准，感官无异味，确保环境卫生。沼气经调压排气装置进行保护性排放，不会直接排入大气，不仅避免产生异味，而且安全性也大大提高。The effects of the present invention are: the present invention proposes a biogas double-membrane storage system for a waste incineration power plant. Due to the addition of a pressure regulating and exhausting device, when the gas pressure in the pressure regulating chamber is overpressured, the pressure regulator of the pressure regulating and exhausting device is opened. , The gas from the surge chamber enters the alkali scrubbing tower and the deodorizing spray tower in turn through the pipeline, and is discharged after treatment. The biogas is discharged through the pressure regulating exhaust device for protection, and will not be directly discharged into the atmosphere, which not only avoids the generation of peculiar smell, but also greatly improves the safety.
附图说明Description of drawings
图1为现有技术一个实施例的结构示意图。FIG. 1 is a schematic structural diagram of an embodiment of the prior art.
图2为本发明一个实施例的结构示意图。FIG. 2 is a schematic structural diagram of an embodiment of the present invention.
图3为本发明另一个实施例的结构示意图。FIG. 3 is a schematic structural diagram of another embodiment of the present invention.
图中：In the picture:
1.防爆风机，1. Explosion-proof fan,
2.逆止阀，2. Check valve,
3.安全阀，3. Safety valve,
4.底膜，4. Bottom film,
5.外膜，5. adventitia,
5.1调压室，5.1 surge chamber,
6.内膜，6. Intima,
6.1储气空间，6.1 Air storage space,
7.进气管，7. Intake pipe,
8.底板，8. Bottom plate,
9.压力调节器，9. Pressure regulator,
9.1第一连接管道、10.1第二连接管道，9.1 The first connecting pipe, 10.1 The second connecting pipe,
10.碱洗涤塔，10. Alkali scrubber,
11.除臭喷淋塔。11. Deodorizing spray tower.
具体实施方式Detailed ways
图1为现有技术一个实施例的结构示意图。图中显示，现有技术中，一种垃圾焚烧发电厂沼气双膜储存系统，包括防爆风机1、逆止阀2、安全阀3、底膜4、外膜5、内膜6、进气管7及底板8，所述底膜4贴合固定在所述底板8上，所述底膜4与所述内膜6之间构成一个密闭的储气空间6.1，所述内膜6与所述外膜5之间构成一个调压室5.1，沼气池产生的沼气经所述进气管7进入所述储气空间6.1。由于膜材质的特殊性，不可避免会出现沼气透过膜材发生逸散至调压室和外膜逸散到大气的现象。在现有技术中，当系统超压时，调压室内气体会通过安全阀3直接排向大气中，以确保系统处于恒压状态。但由于调压室 内气体是通过安全阀直接排向大气中，严重影响周围环境卫生，并且造成潜在的安全隐患。FIG. 1 is a schematic structural diagram of an embodiment of the prior art. The figure shows that in the prior art, a biogas dual-membrane storage system for a waste incineration power plant includes an explosion-proof fan 1, a check valve 2, a safety valve 3, a bottom membrane 4, an outer membrane 5, an inner membrane 6, and an air intake pipe 7. and the bottom plate 8, the bottom film 4 is attached and fixed on the bottom plate 8, a closed air storage space 6.1 is formed between the bottom film 4 and the inner film 6, and the inner film 6 and the outer A pressure regulating chamber 5.1 is formed between the membranes 5, and the biogas generated by the biogas digester enters the gas storage space 6.1 through the air intake pipe 7. Due to the particularity of the membrane material, it is inevitable that biogas will escape to the surge chamber through the membrane material and escape to the atmosphere through the outer membrane. In the prior art, when the system is overpressured, the gas in the surge chamber will be directly discharged into the atmosphere through the safety valve 3 to ensure that the system is in a state of constant pressure. However, because the gas in the surge chamber is directly discharged into the atmosphere through the safety valve, it will seriously affect the surrounding environment and cause potential safety hazards.
图2为本发明一个实施例的结构示意图。图中显示，本例中，一种垃圾焚烧发电厂沼气双膜储存系统，包括防爆风机1、逆止阀2、安全阀3、底膜4、外膜5、内膜6，进气管7及底板8，所述底膜4贴合固定在所述底板8上，所述底膜4与所述内膜6之间构成一个密闭的储气空间6.1，所述内膜6与所述外膜5之间构成一个调压室5.1，沼气池产生的沼气经所述进气管7进入所述储气空间6.1。FIG. 2 is a schematic structural diagram of an embodiment of the present invention. The figure shows that, in this example, a biogas double-membrane storage system for a waste incineration power plant includes an explosion-proof fan 1, a check valve 2, a safety valve 3, a bottom membrane 4, an outer membrane 5, an inner membrane 6, an air intake pipe 7 and Bottom plate 8, the bottom film 4 is attached and fixed on the bottom plate 8, a closed air storage space 6.1 is formed between the bottom film 4 and the inner film 6, the inner film 6 and the outer film A pressure regulating chamber 5.1 is formed between 5, and the biogas generated by the biogas digester enters the gas storage space 6.1 through the intake pipe 7.
与现有技术不同的是，图中显示，本例中，还增设一个调压排气装置，依据气体流动方向所述调压排气装置依次包括压力调节器9、碱洗涤塔10、除臭喷淋塔11，以及连接压力调节器9与所述调压室5.1的第一连接管道9.1和连接碱洗涤塔10与除臭喷淋塔11的第二连接管道10.1，调压装置经所述第一连接管道9.1与所述调压室5.1连接，所述调压室5.1的超压时，压力调节器9打开，所述调压室5.1的气体经第一连接管道9.1排入碱洗涤塔10，然后再经第二连接管道10.1排入除臭喷淋塔11。安全阀3仅起双重保护作用。Different from the prior art, as shown in the figure, in this example, a pressure regulating and exhausting device is also added. According to the gas flow direction, the pressure regulating and exhausting device includes a pressure regulator 9, an alkali washing tower 10, a deodorization device in sequence. The spray tower 11, as well as the first connecting pipe 9.1 connecting the pressure regulator 9 and the pressure regulating chamber 5.1 and the second connecting pipe 10.1 connecting the alkali scrubbing tower 10 and the deodorizing spray tower 11, the pressure regulating device passes through the The first connecting pipe 9.1 is connected to the pressure regulating chamber 5.1. When the pressure regulating chamber 5.1 is overpressured, the pressure regulator 9 is opened, and the gas in the pressure regulating chamber 5.1 is discharged into the alkali scrubbing tower through the first connecting pipe 9.1 10, and then discharged into the deodorizing spray tower 11 through the second connecting pipeline 10.1. The safety valve 3 only plays a double protection role.
本发明提示，调压室5.1的气体压强可以控制在1000-2000Kpa范围内。The present invention suggests that the gas pressure in the surge chamber 5.1 can be controlled within the range of 1000-2000 Kpa.
本发明提示，碱洗涤塔10内塔循环液采用氢氧化钠和次氯酸钠，控制循环液PH＝12～14，调压室内气体进入后，通过碱液洗涤，可高效去除挥发性有机物(VOC)、硫化氢、氨气、硫醇类以及其它恶臭气体，净化效率最高可达95％以上。除臭喷淋塔11循环液采用芳香除臭剂，可高效去除碱液洗涤后气体中的残留部分，排放出的气体带有芳香效果，具有美化环境的功效。The present invention suggests that sodium hydroxide and sodium hypochlorite are used as the circulating liquid in the inner tower of the alkali washing tower 10, and the pH of the circulating liquid is controlled to be 12-14. For hydrogen sulfide, ammonia, mercaptans and other odorous gases, the purification efficiency can reach more than 95%. The circulating liquid of the deodorizing spray tower 11 adopts an aromatic deodorant, which can efficiently remove the residual part in the gas after the alkali washing, and the discharged gas has an aromatic effect and has the effect of beautifying the environment.
本例中，防爆风机1可以采用变频控制。通过调整防爆风机1频率来改变调压室内换气风量，使调压室内气体流动具有流动性，提高双膜储存系统的安全性能。In this example, the explosion-proof fan 1 can be controlled by frequency conversion. By adjusting the frequency of explosion-proof fan 1, the ventilation air volume in the surge chamber can be changed, so that the gas flow in the surge chamber has fluidity, and the safety performance of the double-membrane storage system is improved.
本例中，由于增设调压排气装置，当调压室气体压强超压时，调压排气装置的压力调节器9打开，调压室5.1的气体经管道依次进入碱洗涤塔10、除臭喷淋塔11，经过处理后排放。沼气经调压排气装置进行保护性排放，不会直接排入大气，不仅避免产生异味，而且安全性也大大提高。In this example, due to the addition of a pressure regulating and exhausting device, when the gas pressure in the pressure regulating chamber is overpressured, the pressure regulator 9 of the pressure regulating and exhausting device is opened, and the gas in the pressure regulating chamber 5.1 enters the alkali scrubbing tower 10 through the pipeline in turn, removes the The smelly spray tower 11 is discharged after treatment. The biogas is discharged through the pressure regulating exhaust device for protection, and will not be directly discharged into the atmosphere, which not only avoids the generation of peculiar smell, but also greatly improves the safety.
图3为本发明另一个实施例的结构示意图。图中显示，本例中，所述外膜5、所述底膜4与底板8之间的接合处通过水密封12.21、12.22进行密封，所述内膜6、所述底膜4与底板8之间的接合处通过水密封12.11、12.12进行密封。水密封可以进一步提高密封效果。本发明提示，水密封的高度可以达到200mm。FIG. 3 is a schematic structural diagram of another embodiment of the present invention. The figure shows that, in this example, the joints between the outer membrane 5, the bottom membrane 4 and the bottom plate 8 are sealed by water seals 12.21, 12.22, the inner membrane 6, the bottom membrane 4 and the bottom plate 8 are sealed The joints between are sealed by water seals 12.11, 12.12. Water sealing can further improve the sealing effect. The present invention suggests that the height of the water seal can reach 200mm.

Claims (2)

  1. 一种垃圾焚烧发电厂沼气双膜储存系统，包括防爆风机、逆止阀、安全阀、底膜、外膜、内膜、进气管及底板，所述底膜贴合固定在所述底板上，所述底膜与所述内膜之间构成一个密闭的储气空间，所述内膜与所述外膜之间构成一个调压室，沼气池产生的沼气经所述进气管进入所述储气空间，其特征是，还增设一个调压排气装置，依据气体流动方向所述调压排气装置依次包括压力调节器、碱洗涤塔、除臭喷淋塔，以及连接压力调节器与所述调压室的第一连接管道和连接碱洗涤塔与除臭喷淋塔的第二连接管道，调压装置经所述第一连接管道与所述调压室连接，所述调压室的气体超压时，所述压力调节器打开，所述调压室的气体经第一连接管道排入碱洗涤塔，然后再经第二连接管道排入除臭喷淋塔。A biogas double-membrane storage system for a waste incineration power plant, comprising an explosion-proof fan, a check valve, a safety valve, a bottom membrane, an outer membrane, an inner membrane, an air intake pipe and a bottom plate, the bottom membrane is attached and fixed on the bottom plate, A closed gas storage space is formed between the bottom membrane and the inner membrane, a pressure regulating chamber is formed between the inner membrane and the outer membrane, and the biogas generated by the biogas digester enters the storage space through the intake pipe. The gas space is characterized in that a pressure regulating and exhausting device is also added. According to the gas flow direction, the pressure regulating and exhausting device sequentially includes a pressure regulator, an alkali scrubbing tower, a deodorizing spray tower, and a connection between the pressure regulator and the The first connecting pipe of the pressure regulating chamber and the second connecting pipe connecting the alkali washing tower and the deodorizing spray tower, the pressure regulating device is connected to the pressure regulating chamber through the first connecting pipe, and the When the gas is overpressured, the pressure regulator is opened, and the gas in the pressure regulating chamber is discharged into the alkali scrubbing tower through the first connecting pipe, and then discharged into the deodorizing spray tower through the second connecting pipe.
  2. 根据权利要求1所述的一种垃圾焚烧发电厂沼气双膜储存系统，其特征是，所述外膜、所述底膜与所述底板之间的接合处通过水密封进行密封，所述内膜、所述底膜与所述底板之间的接合处通过水密封进行密封。The biogas dual-membrane storage system for a waste incineration power plant according to claim 1, wherein the joints between the outer membrane, the bottom membrane and the bottom plate are sealed by water sealing, and the inner membrane is sealed by water sealing. The junction between the membrane, the base membrane and the base plate is sealed by a water seal.
PCT/CN2021/106133 2020-11-06 2021-07-14 Biogas dual-membrane storage system for waste incineration power plant WO2022095500A1 (en)

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