CN218328920U - Oxygen recovery air separation plant - Google Patents
Oxygen recovery air separation plant Download PDFInfo
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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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- 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
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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
- F25J3/04006—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
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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
- F25J3/04151—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
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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
- F25J3/04406—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
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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
- 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]
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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
- 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]
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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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/50—Oxygen
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
Technical Field
The utility model relates to an oxygen recovery technical field especially relates to an oxygen recovery air separation plant.
Background
The lithium ion battery is a battery which is composed of a lithium alloy metal oxide as a positive electrode material, graphite as a negative electrode material and a non-aqueous electrolyte, has the characteristics of environmental protection, high performance, long operation time and the like, and becomes one of the key points of the development of the battery industry, wherein a large amount of pure oxygen is needed in the production process of the lithium battery positive electrode material, a large amount of oxygen-enriched smoke with high temperature and high humidity and approximate normal pressure is generated, and the oxygen-enriched smoke needs to be treated in order to recycle oxygen in the oxygen-enriched smoke.
Chinese patent publication No.: CN113587550A discloses "a recovery unit for empty unloading oxygen" includes air cleaner, air compressor machine, air cooler, molecular sieve, circulation booster compressor, expander, main heat exchanger, rectifying column, oxygen pipe network and oxygen storage tank, and wherein, air cleaner's input intercommunication air source, air cleaner's output communicate in the air compressor machine, the output of air compressor machine communicate in air cooler, air cooler's the other end with the molecular sieve is connected, and the gaseous input after the molecular sieve purification the circulation booster compressor, the output of circulation booster compressor communicate in the pressure boost end of expander, the expansion end of expander with the rectifying column intercommunication, rectifying column are used for to respectively carry oxygen and liquid oxygen in oxygen pipe network and the oxygen storage tank.
The existing method for recovering oxygen in oxygen-enriched flue gas is to add a set of oxygen purification and recovery device to purify, recover and recycle the oxygen-enriched flue gas, so that although the utilization rate of oxygen can be improved, the investment of equipment can be greatly increased, and the recovery efficiency of oxygen in the oxygen-enriched flue gas is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an oxygen recovery air separation plant that can not only purify the oxygen high efficiency in the oxygen boosting flue gas and retrieve and recycle, moreover ability greatly reduced equipment investment.
In order to achieve the above object, the present invention provides the following technical solutions: an oxygen recovery air separation plant, characterized by 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.
As a further description of the above technical solution:
the washing, dedusting, cooling and dehumidifying system comprises a flue gas washing tower and a second cooling water pump, and the recovered flue gas boosting system comprises a flue gas blower.
As a further description of the above technical solution:
the flue gas washing tower is provided with a flue gas inlet pipeline, a flue gas outflow pipeline and a cooling water pipeline, is connected with a flue gas blower through the flue gas outflow pipeline, and is connected with a second cooling water pump through the cooling water pipeline.
As a further description of the above technical solution:
the recovered flue gas purification and drying system comprises a third purifier, a fourth purifier and an electric heater, wherein the third purifier and the fourth purifier are connected with the electric heater through a regeneration gas pipeline.
As a further description of the above technical solution:
the air compression system comprises an air compressor and a supercharger, and the air precooling and purifying system comprises an air cooling tower, a first cooling water pump, a water chilling unit, a chilled water pump, a water cooling tower, a first purifier and a second purifier.
As a further description of the above technical solution:
the air compressor is connected with the air cooling tower through a pipeline, the air cooling tower is connected with the water chilling unit and the first cooling water pump through pipelines, the water chilling unit is connected with the water cooling tower through a pipeline, and the air cooling tower is connected with the first purifier and the second purifier through pipelines.
As a further description of the above technical solution:
the low-temperature rectification system comprises a booster expansion machine, a liquid oxygen pump, a main heat exchanger, a lower tower, a main condensation evaporator, an upper tower and a subcooler.
As a further description of the above technical solution:
the utility model discloses a pressure boost expansion machine, including booster expander, pressure boost expansion machine, main heat exchanger, condenser, main condensation evaporator, main heat exchanger, throttle valve, subcooler, main heat exchanger, subcooler, main heat exchanger, main condenser and main heat exchanger, booster expander pressure boost end is connected through pipeline and booster end aftercooler, booster end aftercooler passes through the pipeline and is connected with main heat exchanger, and another way is connected with main heat exchanger through the pipeline, main heat exchanger is connected to lower tower through the throttle valve, lower tower passes through the pipeline and is connected with the subcooler, the subcooler passes through the pipeline and is connected with last tower, be equipped with main condensation evaporator down between tower and the last tower, main condensation evaporator passes through the tube coupling liquid oxygen pump, the liquid oxygen pump passes through the pipeline and is connected with main heat exchanger.
In the technical scheme, the utility model provides a pair of oxygen recovery air separation plant has following beneficial effect:
this air separation plant adopts the modular system structure of integrated form, can effectively get rid of the metallic oxide dust in retrieving the flue gas, reaches the cooling simultaneously and falls wet, reduces the effect of the activeness of oxygen molecule, ensures the safe operation of low reaches equipment, not only can realize the high efficiency purification of oxygen in the oxygen boosting flue gas and retrieve and recycle, and greatly reduced equipment investment and operation energy consumption have improved the utilization ratio simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural diagram of an oxygen recovery air separation plant provided by an embodiment of the present invention.
Description of reference numerals:
1. a flue gas washing tower; 2. a second cooling water pump; 3. a flue gas blower; 4. a third purifier; 5. a fourth purifier; 6. an electric heater; 7. an air compressor; 8. an air cooling tower; 9. a water cooling tower; 10. a water chilling unit; 11. a chilled water pump; 12. a first cooling water pump; 13. a first purifier; 14. a second purifier; 15. a supercharger; 16. a booster expander; 17. a primary heat exchanger; 18. feeding the mixture into a tower; 19. a liquid oxygen pump; 20. descending the tower; 21. a subcooler; 22. a main condensing evaporator; 23. a charge end aftercooler.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the attached drawings.
As shown in fig. 1, an oxygen recovery air separation plant includes: 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 flue gas recovery boosting system, and guiding the oxygen-enriched flue gas into the flue gas recovery purifying and drying system to adsorb residual moisture to obtain dry and clean flue gas;
the washing, dedusting, cooling and dehumidifying system can effectively remove metal oxide dust in the recovered flue gas, and simultaneously achieves the purposes of cooling and dehumidifying, reducing the activity of oxygen molecules and ensuring the safe operation of downstream equipment;
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;
the air precooling and purifying system adopts a structured packing tower technology, is safe and reliable, has high oxygen extraction rate, can realize high-efficiency purification, recovery and reutilization of oxygen in oxygen-enriched flue gas, greatly reduces equipment investment, has various product structures, can produce oxygen, liquid oxygen, nitrogen and the like, can meet different customer requirements, adopts air and oxygen-enriched flue gas as raw material gas, and has wide application range on the quality of the oxygen-enriched flue gas.
Washing dust removal cooling system of falling wet-end loss package rubbing board is including flue gas washing tower 1 and second cooling water pump 2, retrieves the flue gas system of stepping up and includes flue gas air-blower 3, and flue gas washing tower 1 sets up flue gas inlet pipe way, flue gas outflow pipeline and cooling water pipeline, is connected with flue gas air-blower 3 through flue gas outflow pipeline, is connected with second cooling water pump 2 through cooling water pipeline.
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 a regenerated gas pipeline.
The air compression system comprises an air compressor 7 and a supercharger 15, 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, 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 a pipeline, wherein 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 a pipeline.
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 condensation evaporator 22, an upper tower 18 and a subcooler 21, wherein a boosting end of the booster expansion machine 16 is connected with one path behind a booster 15 through a pipeline, a boosting end of the booster expansion machine 16 is connected with a booster end aftercooler 23 through a pipeline, the booster end aftercooler 23 is connected with the main heat exchanger 17 through a pipeline, the main heat exchanger 17 is connected with the booster expansion machine 16 through a pipeline, the booster expansion machine 16 is connected with the lower tower 20 through a pipeline, the other path is connected with the main heat exchanger 17 through a pipeline, the main heat exchanger 17 is connected to the lower tower 20 through a throttle valve, the lower tower 20 is connected with the subcooler 21 through a pipeline, the subcooler 21 is connected with the upper tower 18 through a pipeline, the main condensation evaporator 22 is arranged between the lower tower 20 and the upper tower 18, the main condensation evaporator 22 is connected with the liquid oxygen pump 19 through a pipeline, and the liquid oxygen pump 19 is connected with the main heat exchanger 17 through a pipeline.
A use method of an oxygen recovery air separation unit comprises the following steps:
s01: after being pressurized to a certain pressure by an air compressor 7, raw material air enters an air cooling tower 8 to be directly contacted with cooling water from a circulating water system and chilled water further cooled by a water cooling tower 9 and a water chilling unit 10 to achieve graded cooling, and the cooled processing air enters a first purifier 13 to adsorb and remove residual moisture, carbon dioxide and hydrocarbons, so that dry and clean air is obtained;
s02: one part of the dry and clean air directly enters a main heat exchanger 17 to be cooled to the temperature close to the saturation temperature and enters a lower tower 20, the rest of the air is compressed by a supercharger 15 and then divided into two streams, one stream is directly sent to the main heat exchanger 17 to provide vaporization heat for liquid oxygen, the cooled liquid air enters the lower tower 20 through throttling, the other stream sequentially passes through a booster expander 16 and a booster end after-cooler 23 and then enters the main heat exchanger 17, is cooled to a certain temperature and then is pumped out to the booster expander 16, and then enters the lower tower 20 after being expanded;
air enters the bottom of the lower tower 20 as ascending steam, passes through each filler from bottom to top, contacts with liquid on the filler, performs heat and mass exchange, obtains high-purity nitrogen at the top, is condensed into liquid nitrogen in the main condensation evaporator 22, flows from top to bottom along the filler as reflux liquid, performs heat and mass exchange with the ascending steam, and obtains oxygen-enriched liquid air at the bottom of the lower tower 20;
s03: the normal-pressure oxygen-enriched flue gas enters a flue gas washing tower 1, is in direct contact with cooling water from a second cooling water pump 2, washes, removes dust, lowers the temperature and lowers the humidity of the oxygen-enriched flue gas, the washed, cooled and dehumidified flue gas is boosted by a flue gas blower 3 and then enters a third purifier 4, residual moisture is removed by adsorption, and the dried and clean flue gas directly enters a main heat exchanger 17 and is sent to an upper tower 18 after being cooled to a certain temperature;
s04: the top of the lower tower 20 obtains liquid nitrogen with higher purity, one part of the liquid nitrogen is used as reflux liquid for rectification of the lower tower 20, the rest of the liquid nitrogen passes through a subcooler 21 and then throttled to enter the upper tower 18 to provide reflux liquid for rectification of the upper tower 18, oxygen-enriched liquid at the bottom of the lower tower 20 passes through a chiller 21 and then throttled to enter the upper tower 18 to participate in rectification, a main condensing evaporator 22 obtains liquid oxygen with higher purity, a proper amount of the liquid oxygen is extracted and pressurized to a required pressure by a liquid oxygen pump 19 to be sent into a main heat exchanger 17 to exchange heat with high-pressure air, the liquid oxygen is gasified into a pressure oxygen product and sent to an oxygen product pipe network, and part of the liquid oxygen is subcooled by the chiller 21 to be sent to downstream as a liquid product.
Certain exemplary embodiments of the present invention have been described above by way of illustration only, and it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222516692.8U CN218328920U (en) | 2022-09-22 | 2022-09-22 | Oxygen recovery air separation plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222516692.8U CN218328920U (en) | 2022-09-22 | 2022-09-22 | Oxygen recovery air separation plant |
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| Publication Number | Publication Date |
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| CN218328920U true CN218328920U (en) | 2023-01-17 |
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| CN202222516692.8U Active CN218328920U (en) | 2022-09-22 | 2022-09-22 | Oxygen recovery air separation plant |
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| CN (1) | CN218328920U (en) |
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Address after: No. 280 Xingye Road, Leidian Town, Deqing County, Huzhou City, Zhejiang Province, 313200 Patentee after: Yingde Gas Engineering (Zhejiang) Co.,Ltd. Address before: 313200 Jingyi Road, Deqing Linhang Industrial Zone, LEIDIAN Town, Deqing County, Huzhou City, Zhejiang Province Patentee before: ZHEJIANG ZHIHAI CHEMICAL EQUIPMENT ENGINEERING Co.,Ltd. |
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