CN218328920U - An oxygen recovery air separation unit - Google Patents

An oxygen recovery air separation unit Download PDF

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CN218328920U
CN218328920U CN202222516692.8U CN202222516692U CN218328920U CN 218328920 U CN218328920 U CN 218328920U CN 202222516692 U CN202222516692 U CN 202222516692U CN 218328920 U CN218328920 U CN 218328920U
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flue gas
air
oxygen
cooling
pipeline
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郝少华
宋鑫
梁泰航
刘金伟
倪家炜
陈晋
王伟
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Yingde Gas Engineering Zhejiang Co ltd
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Zhejiang Zhihai Chemical Equipment Engineering Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
    • F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
    • F25J3/04733—Producing pure argon, e.g. recovered from a crude argon column using a hybrid system, e.g. using adsorption, permeation or catalytic reaction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/50—Oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/70—Flue or combustion exhaust gas

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The utility model discloses an air separation plant is retrieved to oxygen, a serial communication port, include: a washing, dedusting, cooling and dehumidifying system, a recovered flue gas boosting system, a recovered flue gas purifying and drying system, an air compression system, an air precooling and purifying system and a cryogenic rectification system; the washing, dedusting, cooling and dehumidifying system is used for guiding the oxygen-enriched flue gas into the flue gas recovery, purification and drying system to adsorb residual moisture after washing, dedusting, cooling and dehumidifying, so as to obtain dry and clean flue gas, and the air precooling and purification system is used for precooling, cooling and purifying raw material air and guiding the raw material air into the cryogenic rectification system to separate and purify oxygen in the flue gas through cryogenic rectification. The utility model discloses in, this air separation plant adopts the modular system structure of integrated form, can effectively get rid of the metallic oxide dust in the recovery flue gas, reaches the cooling simultaneously and falls wet, reduces the effect of oxygen molecule's activeness, not only can realize the oxygen high efficiency purification in the oxygen boosting flue gas and retrieve recycling, simultaneously greatly reduced equipment investment and operation energy consumption.

Description

一种氧气回收空分装置An oxygen recovery air separation unit

技术领域technical field

本实用新型涉及氧气回收技术领域，尤其涉及一种氧气回收空分装置。The utility model relates to the technical field of oxygen recovery, in particular to an air separation device for oxygen recovery.

背景技术Background technique

锂离子电池是指由锂合金金属氧化物为正极材料，石墨为负极材料，以及非水电解质构成的电池，其具有环保、高性能、运行时间久等特点，已经成为电池行业发展的重点之一，其中，在锂电池正极材料的生产过程中需要用到大量的纯氧，同时产生大量高温高湿、近似常压的富氧烟气，为了实现对富氧烟气内氧气的回收利用，需要对富氧烟气进行处理。Lithium-ion battery refers to a battery composed of lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolyte. It has the characteristics of environmental protection, high performance, and long running time, and has become one of the key points in the development of the battery industry. , among them, a large amount of pure oxygen is required in the production process of lithium battery cathode materials, and a large amount of high-temperature, high-humidity, and approximately normal-pressure oxygen-enriched flue gas is generated at the same time. In order to realize the recovery and utilization of oxygen in the oxygen-enriched flue gas, it is necessary Treat oxygen-enriched flue gas.

中国专利公告号：CN113587550A公开了《一种用于空分放空氧气的回收装置》，包括空气过滤器、空压机、空气冷却器、分子筛、循环增压机、膨胀机、主换热器、精馏塔、氧气管网以及氧贮槽，其中，空气过滤器的输入端连通空气源，空气过滤器的输出端连通于所述空压机，空压机的输出端连通于所述空气冷却器，空气冷却器的另一端和所述分子筛连接，经分子筛纯化后的气体输入所述循环增压机，所述循环增压机的输出端连通于所述膨胀机的增压端，所述膨胀机的膨胀端与所述精馏塔连通，精馏塔用于向所述氧气管网以及氧贮槽内分别输送氧气和液氧。Chinese patent announcement number: CN113587550A discloses "A recovery device for air separation and venting oxygen", including air filter, air compressor, air cooler, molecular sieve, circulating booster, expander, main heat exchanger, Rectification tower, oxygen pipe network and oxygen storage tank, wherein, the input end of air filter communicates with air source, the output end of air filter communicates with described air compressor, the output end of air compressor communicates with described air cooling The other end of the air cooler is connected to the molecular sieve, and the gas purified by the molecular sieve is input into the circulating supercharger, and the output end of the circulating supercharger is connected to the supercharging end of the expander. The expansion end of the expander communicates with the rectification tower, and the rectification tower is used to transport oxygen and liquid oxygen to the oxygen pipe network and the oxygen storage tank respectively.

现有的对富氧烟气中氧气回收的方式通常是增设一套氧气提纯回收装置，将富氧烟气提纯回收再利用，这样的做法虽然能提高氧气的利用率，但会大大增加设备的投资，并且富氧烟气内的氧气的回收效率低下。The existing way of recovering oxygen from oxygen-enriched flue gas is usually to add a set of oxygen purification and recovery device to purify and recycle oxygen-enriched flue gas. Although this method can improve the utilization rate of oxygen, it will greatly increase the cost of equipment. investment, and the recovery of oxygen in the oxygen-enriched flue gas is inefficient.

实用新型内容Utility model content

本实用新型的目的是提供不仅能对富氧烟气中的氧气高效率提纯回收再利用，而且能大大降低设备投资的一种氧气回收空分装置。The purpose of the utility model is to provide an oxygen recovery air separation device which can not only purify and recycle the oxygen in the oxygen-enriched flue gas with high efficiency, but also can greatly reduce the equipment investment.

为了实现上述目的，本实用新型提供如下技术方案：一种氧气回收空分装置，其特征在于，包括：洗涤除尘降温降湿系统、回收烟气升压系统、回收烟气纯化干燥系统、空气压缩系统、空气预冷及纯化系统和低温精馏系统；In order to achieve the above purpose, the utility model provides the following technical solutions: an oxygen recovery air separation plant, which is characterized in that it includes: washing and dust removal temperature and humidity reduction system, recovery flue gas boosting system, recovery flue gas purification and drying system, air compression system, air precooling and purification system and cryogenic rectification system;

所述洗涤除尘降温降湿系统用于将富氧烟气洗涤降尘降温降湿后，通过回收烟气升压系统升压后，导入回收烟气纯化干燥系统吸附残留水分，获得干燥洁净的烟气；The washing, dust removal, temperature and humidity reduction system is used to wash and reduce the temperature and humidity of the oxygen-enriched flue gas, and after the pressure is boosted by the recovery flue gas booster system, it is introduced into the recovery flue gas purification and drying system to absorb residual moisture to obtain dry and clean flue gas ;

所述空气压缩系统用于将原料空气压缩，通过空气预冷及纯化系统将原料空气预冷冷却并纯化后，导入低温精馏系统低温精馏得到氧气。The air compression system is used to compress the raw material air. After the raw material air is precooled and purified by the air precooling and purification system, it is introduced into the low temperature rectification system to obtain oxygen by low temperature rectification.

作为上述技术方案的进一步描述：As a further description of the above technical solution:

所述洗涤除尘降温降湿系统包括烟气洗涤塔和第二冷却水泵，所述回收烟气升压系统包括烟气鼓风机。The scrubbing, dust removal, temperature and humidity reduction system includes a flue gas washing tower and a second cooling water pump, and the recovered flue gas boosting system includes a flue gas blower.

作为上述技术方案的进一步描述：As a further description of the above technical solution:

所述烟气洗涤塔设置烟气进气管路、烟气流出管路及冷却水管路，通过烟气流出管路与烟气鼓风机连接，通过冷却水管路与第二冷却水泵连接。The flue gas washing tower is provided with a flue gas inlet pipeline, a flue gas outlet pipeline and a cooling water pipeline, which are connected to the flue gas blower through the flue gas outlet pipeline, and connected to the second cooling water pump through the cooling water pipeline.

作为上述技术方案的进一步描述：As a further description of the above technical solution:

所述回收烟气纯化干燥系统包括第三纯化器、第四纯化器和电加热器，第三纯化器和第四纯化器通过再生气管路与电加热器连接。The recovered flue gas purification and drying system includes a third purifier, a fourth purifier and an electric heater, and the third purifier and the fourth purifier are connected to the electric heater through a regeneration gas pipeline.

作为上述技术方案的进一步描述：As a further description of the above technical solution:

所述空气压缩系统包括空气压缩机和增压机，所述空气预冷及纯化系统包括空气冷却塔、第一冷却水泵、冷水机组、冷冻水泵、水冷塔、第一纯化器和第二纯化器。The air compression system includes an air compressor and a supercharger, and the air precooling and purification system includes an air cooling tower, a first cooling water pump, a water chiller, a chilled water pump, a water cooling tower, a first purifier and a second purifier .

作为上述技术方案的进一步描述：As a further description of the above technical solution:

所述空气压缩机通过管路与空气冷却塔连接，所述空气冷却塔通过管路与冷水机组、第一冷却水泵连接，其中，冷水机组通过管路与水冷塔连接，所述空气冷却塔通过管路与第一纯化器和第二纯化器连接。The air compressor is connected to the air cooling tower through a pipeline, and the air cooling tower is connected to the chiller and the first cooling water pump through the pipeline, wherein the chiller is connected to the water cooling tower through the pipeline, and the air cooling tower is connected to the water cooling tower through the pipeline. The pipeline is connected with the first purifier and the second purifier.

作为上述技术方案的进一步描述：As a further description of the above technical solution:

所述低温精馏系统包括增压膨胀机、液氧泵、主换热器、下塔、主冷凝蒸发器、上塔和过冷器。The cryogenic rectification system includes a booster expander, a liquid oxygen pump, a main heat exchanger, a lower column, a main condensation evaporator, an upper column and a subcooler.

作为上述技术方案的进一步描述：As a further description of the above technical solution:

所述增压膨胀机增压端通过管路与增压机的后方一路连接，所述增压膨胀机增压端通过管路与增压端后冷却器连接，所述增压端后冷却器通过管路与主换热器连接，所述主换热器通过管路与增压膨胀机连接，所述增压膨胀机通过管路与下塔连接，另一路通过管路与主换热器连接，所述主换热器通过节流阀连接至下塔，所述下塔通过管路与过冷器连接，所述过冷器通过管路与上塔连接，所述下塔与上塔之间设有主冷凝蒸发器，所述主冷凝蒸发器通过管路连接液氧泵，所述液氧泵通过管路与主换热器连接。The booster end of the booster expander is connected to the rear of the booster through a pipeline, the booster end of the booster expander is connected to the aftercooler at the booster end through a pipeline, and the aftercooler at the booster end It is connected to the main heat exchanger through pipelines, the main heat exchanger is connected to the booster expander through pipelines, the booster expander is connected to the lower tower through pipelines, and the other way is connected to the main heat exchanger through pipelines connected, the main heat exchanger is connected to the lower tower through a throttle valve, the lower tower is connected to the subcooler through pipelines, the subcooler is connected to the upper tower through pipelines, and the lower tower is connected to the upper tower A main condensing evaporator is arranged between them, and the main condensing evaporator is connected to a liquid oxygen pump through a pipeline, and the liquid oxygen pump is connected to the main heat exchanger through a pipeline.

在上述技术方案中，本实用新型提供的一种氧气回收空分装置，具有以下有益效果：In the above technical solution, the utility model provides an oxygen recovery air separation unit, which has the following beneficial effects:

该空分装置采用集成式的模块系统结构，可有效去除回收烟气中的金属氧化物粉尘，同时达到降温降湿，降低氧分子的活跃度的效果，确保下游设备的安全运行，不但能实现对富氧烟气中的氧气高效率提纯回收再利用，同时大大降低设备投资和运行能耗，提高了利用率。The air separation unit adopts an integrated modular system structure, which can effectively remove the metal oxide dust in the recovered flue gas, and at the same time achieve the effect of reducing temperature and humidity, reducing the activity of oxygen molecules, and ensuring the safe operation of downstream equipment. The oxygen in the oxygen-enriched flue gas is purified, recovered and reused with high efficiency, while greatly reducing equipment investment and operating energy consumption, and improving the utilization rate.

附图说明Description of drawings

为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型中记载的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. For some embodiments described, those skilled in the art can also obtain other drawings according to these drawings.

图1为本实用新型实施例提供的一种氧气回收空分装置的结构示意图。Fig. 1 is a schematic structural diagram of an oxygen recovery air separation plant provided by an embodiment of the present invention.

附图标记说明：Explanation of reference signs:

1、烟气洗涤塔；2、第二冷却水泵；3、烟气鼓风机；4、第三纯化器；5、第四纯化器；6、电加热器；7、空气压缩机；8、空气冷却塔；9、水冷塔；10、冷水机组；11、冷冻水泵；12、第一冷却水泵；13、第一纯化器；14、第二纯化器；15、增压机；16、增压膨胀机；17、主换热器；18、上塔；19、液氧泵；20、下塔；21、过冷器；22、主冷凝蒸发器；23、增压端后冷却器。1. Flue gas scrubber; 2. Second cooling water pump; 3. Flue gas blower; 4. Third purifier; 5. Fourth purifier; 6. Electric heater; 7. Air compressor; 8. Air cooling Tower; 9. Water cooling tower; 10. Chiller; 11. Chilled water pump; 12. First cooling water pump; 13. First purifier; 14. Second purifier; 15. Booster; 16. Booster expander 17. Main heat exchanger; 18. Upper tower; 19. Liquid oxygen pump; 20. Lower tower; 21. Subcooler; 22. Main condensing evaporator;

具体实施方式detailed description

为了使本领域的技术人员更好地理解本实用新型的技术方案，下面将结合附图对本实用新型作进一步的详细介绍。In order to make those skilled in the art better understand the technical solution of the utility model, the utility model will be further introduced in detail below in conjunction with the accompanying drawings.

如图1所示，一种氧气回收空分装置，包括：洗涤除尘降温降湿系统、回收烟气升压系统、回收烟气纯化干燥系统、空气压缩系统、空气预冷及纯化系统和低温精馏系统；As shown in Figure 1, an air separation plant for oxygen recovery includes: a washing and dust removal cooling and dehumidification system, a recovery flue gas boosting system, a recovery flue gas purification and drying system, an air compression system, an air precooling and purification system, and a low-temperature purification system. distillation system;

洗涤除尘降温降湿系统用于将富氧烟气洗涤降尘降温降湿后，通过回收烟气升压系统升压后，导入回收烟气纯化干燥系统吸附残留水分，获得干燥洁净的烟气；The washing, dust removal, temperature and humidity reduction system is used to wash the oxygen-enriched flue gas to reduce dust, reduce temperature and humidity, and after boosting the pressure through the recovered flue gas booster system, it is introduced into the recovered flue gas purification and drying system to absorb residual moisture to obtain dry and clean flue gas;

洗涤除尘降温降湿系统可有效去除回收烟气中的金属氧化物粉尘，同时达到降温降湿，降低氧分子的活跃度，确保下游设备的安全运行；The scrubbing, dust removal, temperature and humidity reduction system can effectively remove the metal oxide dust in the recovered flue gas, and at the same time achieve cooling and humidity reduction, reduce the activity of oxygen molecules, and ensure the safe operation of downstream equipment;

空气压缩系统用于将原料空气压缩，通过空气预冷及纯化系统将原料空气预冷冷却并纯化后，导入低温精馏系统低温精馏得到氧气；The air compression system is used to compress the raw material air. After the raw material air is precooled and purified by the air precooling and purification system, it is introduced into the low temperature rectification system to obtain oxygen by low temperature rectification;

空气预冷及纯化系统采用规整填料塔技术，安全可靠，氧提取率高，不但能实现对富氧烟气中的氧气高效率提纯回收再利用，同时大大降低设备投资，同时产品结构多样，可产氧气、液氧、氮气等，可满足不同的客户需求，原料气为空气和富氧烟气，且对富氧烟气的品质适用范围广。The air pre-cooling and purification system adopts structured packing tower technology, which is safe and reliable, and has a high oxygen extraction rate. It can not only realize high-efficiency purification, recovery and reuse of oxygen in oxygen-enriched flue gas, but also greatly reduce equipment investment. At the same time, the product structure is diverse. Oxygen, liquid oxygen, nitrogen, etc. can be produced to meet different customer needs. The raw material gas is air and oxygen-enriched flue gas, and the quality of oxygen-enriched flue gas is applicable to a wide range.

洗涤除尘降温降湿系统包括烟气洗涤塔1和第二冷却水泵2，回收烟气升压系统包括烟气鼓风机3，烟气洗涤塔1设置烟气进气管路、烟气流出管路及冷却水管路，通过烟气流出管路与烟气鼓风机3连接，通过冷却水管路与第二冷却水泵2连接。The scrubbing, dedusting, cooling and dehumidifying system includes a flue gas scrubber 1 and a second cooling water pump 2. The flue gas recovery system includes a flue gas blower 3. The flue gas scrubbing tower 1 is equipped with a flue gas inlet pipeline, a flue gas outflow pipeline and cooling The water pipeline is connected to the flue gas blower 3 through the flue gas outflow pipeline, and connected to the second cooling water pump 2 through the cooling water pipeline.

回收烟气纯化干燥系统包括第三纯化器4、第四纯化器5和电加热器6，第三纯化器4和第四纯化器5通过再生气管路与电加热器6连接。The recovered flue gas purification and drying system includes a third purifier 4, a fourth purifier 5 and an electric heater 6, and the third purifier 4 and the fourth purifier 5 are connected to the electric heater 6 through a regeneration gas pipeline.

空气压缩系统包括空气压缩机7和增压机15，空气预冷及纯化系统包括空气冷却塔8、第一冷却水泵12、冷水机组10、冷冻水泵11、水冷塔9、第一纯化器13和第二纯化器14，空气压缩机7通过管路与空气冷却塔8连接，空气冷却塔8通过管路与冷水机组10、第一冷却水泵12连接，其中，冷水机组10通过管路与水冷塔9连接，空气冷却塔8通过管路与第一纯化器13和第二纯化器连接14。The air compression system includes an air compressor 7 and a booster 15, and the air precooling and purification system includes an air cooling tower 8, a first cooling water pump 12, a water chiller 10, a chilled water pump 11, a water cooling tower 9, a first purifier 13 and The second purifier 14, the air compressor 7 is connected with the air cooling tower 8 through the pipeline, and the air cooling tower 8 is connected with the chiller 10 and the first cooling water pump 12 through the pipeline, wherein the chiller 10 is connected with the water cooling tower through the pipeline 9, the air cooling tower 8 is connected with the first purifier 13 and the second purifier 14 through pipelines.

低温精馏系统包括增压膨胀机16、液氧泵19、主换热器17、下塔20、主冷凝蒸发器22、上塔18和过冷器21，增压膨胀机16增压端通过管路与增压机15的后方一路连接，增压膨胀机16增压端通过管路与增压端后冷却器23连接，增压端后冷却器23通过管路与主换热器17连接，主换热器17通过管路与增压膨胀机16连接，增压膨胀机16通过管路与下塔20连接，另一路通过管路与主换热器17连接，主换热器17通过节流阀连接至下塔20，下塔20通过管路与过冷器21连接，过冷器21通过管路与上塔18连接，下塔20与上塔18之间设有主冷凝蒸发器22，主冷凝蒸发器22通过管路连接液氧泵19，液氧泵19通过管路与主换热器17连接。The cryogenic rectification system includes a booster expander 16, a liquid oxygen pump 19, a main heat exchanger 17, a lower tower 20, a main condensation evaporator 22, an upper tower 18 and a subcooler 21, and the booster end of the booster expander 16 passes through The pipeline is connected to the rear of the booster 15, the booster end of the booster expander 16 is connected to the aftercooler 23 at the booster end through a pipeline, and the aftercooler 23 at the booster end is connected to the main heat exchanger 17 through a pipeline , the main heat exchanger 17 is connected to the booster expander 16 through a pipeline, the booster expander 16 is connected to the lower tower 20 through a pipeline, and the other way is connected to the main heat exchanger 17 through a pipeline, and the main heat exchanger 17 passes through The throttle valve is connected to the lower tower 20, and the lower tower 20 is connected to the subcooler 21 through pipelines, and the subcooler 21 is connected to the upper tower 18 through pipelines, and a main condensation evaporator is arranged between the lower tower 20 and the upper tower 18 22. The main condensing evaporator 22 is connected to the liquid oxygen pump 19 through a pipeline, and the liquid oxygen pump 19 is connected to the main heat exchanger 17 through a pipeline.

一种氧气回收空分装置的使用方法，包括以下步骤：A method for using an oxygen recovery air separation unit, comprising the following steps:

S01：原料空气经空气压缩机7加压到一定压力后，进入空气冷却塔8与来自循环水系统的冷却水和经水冷塔9、冷水机组10进一步冷却的冷冻水直接接触，达到分级冷却，冷却后的加工空气进入第一纯化器13，吸附除去残余的水份、二氧化碳和碳氢化合物，获得干燥洁净的空气；S01: After the raw air is pressurized to a certain pressure by the air compressor 7, it enters the air cooling tower 8 and directly contacts the cooling water from the circulating water system and the chilled water further cooled by the water cooling tower 9 and the chiller 10 to achieve graded cooling. The cooled processed air enters the first purifier 13, absorbs and removes residual moisture, carbon dioxide and hydrocarbons, and obtains dry and clean air;

S02：干燥洁净的空气一部分直接进入主换热器17冷却至接近饱和温度进入下塔20，其余空气经过增压机15压缩后分为两股，一股直接送入主换热器17，为液氧提供汽化热，冷却成液空经节流就进入下塔20，另一股依次经增压膨胀机16、增压端后冷却器23后进入主换热器17，冷却至一定温度后抽出至增压膨胀机16，膨胀后进入下塔20；S02: A part of the dry and clean air directly enters the main heat exchanger 17 to be cooled to a temperature close to saturation and enters the lower tower 20, and the rest of the air is divided into two streams after being compressed by the supercharger 15, and one stream is directly sent to the main heat exchanger 17 for The liquid oxygen provides the heat of vaporization, and after being cooled into liquid air, it enters the lower tower 20 after throttling, and the other stream enters the main heat exchanger 17 after passing through the booster expander 16 and the aftercooler 23 at the booster end in turn, and after cooling to a certain temperature Extracted to booster expander 16, enters lower tower 20 after expansion;

空气进入下塔20的底部，做为上升蒸汽，自下而上穿过每一块填料，与填料上的液体接触，进行热质交换，在顶部得到高纯度的氮气，该氮气在主冷凝蒸发器22内被冷凝成为液氮，做为回流液，沿填料自上而下流动，与上升蒸汽进行热质交换，在下塔20底部得到富氧液态空气；Air enters the bottom of the lower tower 20 as rising steam, passes through each piece of packing from bottom to top, contacts with the liquid on the packing, performs heat and mass exchange, and obtains high-purity nitrogen at the top, and the nitrogen is in the main condensation evaporator 22 is condensed into liquid nitrogen, used as reflux liquid, flows from top to bottom along the filler, exchanges heat and mass with rising steam, and obtains oxygen-enriched liquid air at the bottom of lower tower 20;

S03：常压富氧烟气进入烟气洗涤塔1，与来自第二冷却水泵2的冷却水直接接触，对富氧烟气洗涤除尘降温降湿，洗涤降温降湿后的烟气经烟气鼓风机3升压后，进入第三纯化器4，吸附除去残余的水分，干燥洁净的烟气直接进入主换热器17冷却至一定温度后送至上塔18；S03: Atmospheric pressure oxygen-enriched flue gas enters the flue gas scrubber 1, and directly contacts with the cooling water from the second cooling water pump 2 to wash and remove dust and reduce temperature and humidity of the oxygen-enriched flue gas. After the blower 3 boosts the pressure, it enters the third purifier 4, absorbs and removes residual moisture, and the dry and clean flue gas directly enters the main heat exchanger 17 and is cooled to a certain temperature before being sent to the upper tower 18;

S04：下塔20顶部获得纯度较高的液氮，一部分做为下塔20精馏提供回流液，剩余液氮经过冷器21后，节流进入上塔18，为上塔18精馏提供回流液，下塔20底部的富氧液体经过冷器21后，节流进入上塔18参与精馏，主冷凝蒸发器22获得纯度较高的液氧，抽取适量经液氧泵19增压至所需压力送入主换热器17与高压空气换热，气化成压力氧气产品，送至氧气产品管网，部分液氧经过冷器21过冷后做为液体产品送往下游。S04: Liquid nitrogen with high purity is obtained from the top of the lower tower 20, part of which is used as a reflux liquid for the rectification of the lower tower 20, and the remaining liquid nitrogen is throttled into the upper tower 18 after passing through the cooler 21 to provide reflux for the rectification of the upper tower 18 After the oxygen-enriched liquid at the bottom of the lower tower 20 passes through the cooler 21, it is throttled and enters the upper tower 18 to participate in rectification. The main condensing evaporator 22 obtains liquid oxygen with higher purity. The required pressure is sent to the main heat exchanger 17 to exchange heat with the high-pressure air, gasified into a pressure oxygen product, and sent to the oxygen product pipeline network, and part of the liquid oxygen is supercooled by the cooler 21 and sent downstream as a liquid product.

以上只通过说明的方式描述了本实用新型的某些示范性实施例，毋庸置疑，对于本领域的普通技术人员，在不偏离本实用新型的精神和范围的情况下，可以用各种不同的方式对所描述的实施例进行修正。因此，上述附图和描述在本质上是说明性的，不应理解为对本实用新型权利要求保护范围的限制。Some exemplary embodiments of the present utility model have been described above only by way of illustration. Undoubtedly, for those skilled in the art, without departing from the spirit and scope of the present utility model, various Modifications are made to the described embodiments. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims (8)

1. An oxygen recovery air separation plant, comprising: a washing, dedusting, cooling and dehumidifying system, a recovered flue gas boosting system, a recovered flue gas purifying and drying system, an air compression system, an air precooling and purifying system and a cryogenic rectification system;
the washing, dedusting, cooling and dehumidifying system is used for washing, dedusting, cooling and dehumidifying the oxygen-enriched flue gas, boosting the pressure of the oxygen-enriched flue gas through the recovered flue gas boosting system, and introducing the oxygen-enriched flue gas into the recovered flue gas purifying and drying system to adsorb residual moisture to obtain dry and clean flue gas;
the air compression system is used for compressing raw material air, precooling, cooling and purifying the raw material air through the air precooling and purifying system, and then introducing the raw material air into the cryogenic rectification system for cryogenic rectification to obtain oxygen.
2. An oxygen recovery air separation plant as claimed in claim 1, wherein: the washing, dedusting, cooling and dehumidifying system comprises a flue gas washing tower (1) and a second cooling water pump (2), and the recycling flue gas boosting system comprises a flue gas blower (3).
3. An oxygen recovery air separation plant as claimed in claim 2, wherein: the flue gas washing tower (1) is provided with a flue gas inlet pipeline, a flue gas outflow pipeline and a cooling water pipeline, is connected with the flue gas blower (3) through the flue gas outflow pipeline, and is connected with the second cooling water pump (2) through the cooling water pipeline.
4. An oxygen recovery air separation plant as claimed in claim 1, wherein: the recovered flue gas purification and drying system comprises a third purifier (4), a fourth purifier (5) and an electric heater (6), wherein the third purifier (4) and the fourth purifier (5) are connected with the electric heater (6) through regenerated gas pipelines.
5. An oxygen recovery air separation plant as claimed in claim 1, wherein: the air compression system comprises an air compressor (7) and a supercharger (15), and the air pre-cooling and purifying system comprises an air cooling tower (8), a first cooling water pump (12), a water chilling unit (10), a freezing water pump (11), a water cooling tower (9), a first purifier (13) and a second purifier (14).
6. An oxygen recovery air separation plant according to claim 5 wherein: the air cooling system is characterized in that the air compressor (7) is connected with the air cooling tower (8) through a pipeline, the air cooling tower (8) is connected with the water chilling unit (10) and the first cooling water pump (12) through pipelines, the water chilling unit (10) is connected with the water cooling tower (9) through a pipeline, and the air cooling tower (8) is connected with the first purifier (13) and the second purifier (14) through pipelines.
7. An oxygen recovery air separation plant as claimed in claim 1, wherein: the cryogenic rectification system comprises a booster expansion machine (16), a liquid oxygen pump (19), a main heat exchanger (17), a lower tower (20), a main condensing evaporator (22), an upper tower (18) and a subcooler (21).
8. An oxygen recovery air separation plant as claimed in claim 7 wherein: the utility model discloses a booster expansion machine, including booster expansion machine (16), booster expansion machine (16) pressure boost end, main heat exchanger (17), booster expansion machine (16) pressure boost end is connected with booster expansion machine (15) through pipeline and after cooler (23), booster expansion machine (23) is connected with main heat exchanger (17) through the pipeline, main heat exchanger (17) are connected with booster expansion machine (16) through the pipeline, booster expansion machine (16) are connected with lower tower (20) through the pipeline, and another way is connected with main heat exchanger (17) through the pipeline, main heat exchanger (17) are connected to lower tower (20) through the choke valve, lower tower (20) is connected with subcooler (21) through the pipeline, subcooler (21) are connected with upper tower (18) through the pipeline, be equipped with main condensation evaporator (22) down between tower (20) and upper tower (18), main condensation evaporator (22) are connected liquid oxygen pump (19) through the pipeline, liquid oxygen pump (19) are connected with main heat exchanger (17) through the pipeline.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115406182A (en) * 2022-09-22 2022-11-29 浙江智海化工设备工程有限公司 Oxygen recovery air separation plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115406182A (en) * 2022-09-22 2022-11-29 浙江智海化工设备工程有限公司 Oxygen recovery air separation plant
CN115406182B (en) * 2022-09-22 2025-11-14 盈德气体工程(浙江)有限公司 An oxygen recovery air separation device

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