CN216245125U - Air separation adjusting system - Google Patents

Air separation adjusting system Download PDF

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Publication number
CN216245125U
CN216245125U CN202122559784.XU CN202122559784U CN216245125U CN 216245125 U CN216245125 U CN 216245125U CN 202122559784 U CN202122559784 U CN 202122559784U CN 216245125 U CN216245125 U CN 216245125U
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China
Prior art keywords
liquid
air
oxygen
cold box
air separation
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CN202122559784.XU
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Chinese (zh)
Inventor
贾振宇
江蓉
韩涛
倪宏伟
廖海燕
赖勇杰
张金生
曹峻
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Sichuan Air Separation Plant Group Co ltd
Guoneng Guohua Beijing Electric Power Research Institute Co ltd
Original Assignee
Sichuan Air Separation Plant Group Co ltd
Guoneng Guohua Beijing Electric Power Research Institute 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
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low 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
    • F25J3/04406—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
    • F25J3/04472—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
    • F25J3/04496—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
    • F25J3/04503—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
    • F25J3/04509—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems within the cold part of the air fractionation, i.e. exchanging "cold" within the fractionation and/or 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
    • F25J3/04472—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
    • F25J3/04496—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
    • F25J3/04503—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
    • F25J3/04509—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems within the cold part of the air fractionation, i.e. exchanging "cold" within the fractionation and/or main heat exchange line
    • F25J3/04515—Simultaneously changing air feed and products output
    • 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
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04533—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the direct combustion of fuels in a power plant, so-called "oxyfuel combustion"
    • 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
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
    • 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
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • F25J3/04957—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipments upstream of the fractionation unit (s), i.e. at the "front-end"
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/24—Multiple compressors or compressor stages in parallel
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/40—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being air

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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)
  • Combustion & Propulsion (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The application discloses an air separation regulating system, which is used for providing gaseous oxygen for a generator set, and comprises an air separation cold box and a liquid oxygen storage tank, wherein the generator set and the liquid oxygen storage tank are respectively connected with the air separation cold box through pipelines, the air separation cold box can separate the obtained air to generate the gaseous oxygen and the liquid oxygen, the gaseous oxygen in the air separation cold box can be conveyed to the generator set, the liquid oxygen can circulate between the air separation cold box and the liquid oxygen storage tank, the gaseous oxygen and the liquid oxygen can be mutually converted in the air separation cold box, under the condition that the load of the generator set is increased, the liquid oxygen in the liquid oxygen storage tank can be conveyed to the air separation cold box to increase the oxygen content of the air separation cold box, under the condition that the load of the generator set is reduced, the liquid oxygen in the air separation cold box can be conveyed to the liquid oxygen storage tank to reduce the oxygen content of the cold box, so that the air separation regulating system can quickly respond to the load change of a coal-fired power plant, so as to meet the requirements of oxygen-enriched combustion.

Description

Air separation adjusting system
Technical Field
The application relates to the technical field of air separation, in particular to an air separation regulating system.
Background
The oxygen-enriched combustion is performed by using oxygen-containing gas with the oxygen content (20.947%) higher than that of air, and is an efficient energy-saving combustion technology. It is applied in the fields of glass industry, metallurgical industry and heat energy engineering. Taking a coal-fired power plant as an example, the coal-fired power plant generates oxygen through an air separation plant to realize oxygen-enriched combustion, and the oxygen supply amount of the air separation plant needs to be adjusted along with the load change of a generator set.
However, the coal-fired power plant is affected by the power grid dispatching requirement, the load change range and the change rate of the coal-fired power plant are large, the dynamic adjustment capability of the oxygen generating device in the related technology is poor, the quick response to the load change of the coal-fired power plant cannot be realized, and the oxygen generation amount of the oxygen generating device cannot be accurately adjusted along with the load change of the generator set.
SUMMERY OF THE UTILITY MODEL
The application discloses air separation governing system to solve the problem that the load change of coal fired power plant can't be responded to fast of correlation technique.
In order to solve the above problems, the following technical solutions are adopted in the present application:
the utility model provides an empty governing system that divides for provide gaseous oxygen to generating set, including empty cold box and liquid oxygen basin of dividing, the empty cold box of dividing of generating set and liquid oxygen basin difference tube coupling, empty cold box of dividing can separate the air that obtains, in order to generate gaseous oxygen, liquid oxygen, gaseous oxygen in the empty cold box of dividing can carry to generating set, liquid oxygen can circulate between empty cold box of dividing and liquid oxygen basin, gaseous oxygen and liquid oxygen can be in empty cold box of dividing each other changes, under the condition of generating set load increase, liquid oxygen in the liquid oxygen basin of dividing can carry to empty cold box of dividing, under the condition that generating set load reduces, the liquid oxygen of empty cold box of dividing can carry to the liquid oxygen basin.
Further, the air separation conditioning system further comprises a liquid nitrogen storage tank, the air separation cold box can separate the obtained air to generate liquid nitrogen and gaseous nitrogen, the liquid nitrogen can circulate between the air separation cold box and the liquid nitrogen storage tank, the liquid nitrogen and the gaseous nitrogen can be mutually converted in the air separation cold box, the liquid nitrogen in the air separation cold box can be conveyed to the liquid nitrogen storage tank under the condition that the load of the generator set is increased, and the liquid nitrogen in the liquid nitrogen storage tank can be conveyed to the air separation cold box under the condition that the load of the generator set is reduced.
Further, empty governing system that divides still includes the liquid air storage tank, and liquid nitrogen, liquid oxygen all can circulate between empty cold box and the liquid air storage tank of dividing, and under the circumstances of generating set load increase, liquid nitrogen and liquid oxygen in the liquid air storage tank all can be carried to empty cold box of dividing, and under the circumstances of generating set load reduction, liquid nitrogen and liquid oxygen in the empty cold box of dividing all can be carried to the liquid air storage tank.
Furthermore, a first liquid oxygen pipeline and a second liquid oxygen pipeline are arranged between the air separation cold box and the liquid oxygen storage tank, the first liquid oxygen pipeline is provided with a first liquid oxygen control valve, the second liquid oxygen pipeline is provided with a second liquid oxygen control valve and a liquid oxygen control pump, when the load of the generator set is increased, the first liquid oxygen control valve is closed, the second liquid oxygen control valve and the liquid oxygen control pump are opened, and liquid oxygen in the liquid oxygen storage tank can be conveyed to the air separation cold box through the second liquid oxygen pipeline; under the condition of reducing the load of the generator set, the first liquid oxygen control valve is opened, the second liquid oxygen control valve and the liquid oxygen control pump are closed, and liquid oxygen in the air separation cold box can be conveyed to the liquid oxygen storage tank through the first liquid oxygen pipeline.
Further, be equipped with first liquid nitrogen pipeline and second liquid nitrogen pipeline between empty cold box and the liquid nitrogen basin, first liquid nitrogen pipeline is equipped with first liquid nitrogen control valve, second liquid nitrogen pipeline is equipped with second liquid nitrogen control valve and liquid nitrogen control pump, under the circumstances of generating set load increase, first liquid nitrogen control valve is opened, second liquid nitrogen control valve and liquid nitrogen control pump are closed, empty liquid nitrogen in the cold box that divides can carry to the liquid nitrogen basin through first liquid nitrogen pipeline, under the circumstances that generating set load reduces, first liquid nitrogen control valve closes, second liquid nitrogen control valve and liquid nitrogen control pump open, liquid nitrogen in the liquid nitrogen reservoir can carry to empty cold box that divides through second liquid nitrogen pipeline.
Furthermore, a first liquid air pipeline and a second liquid air pipeline are arranged between the air separation cold box and the liquid air storage tank, the first liquid air pipeline is provided with a first liquid air control valve, the second liquid air pipeline is provided with a second liquid air control valve and a liquid air control pump, the first liquid air control valve is closed, the second liquid air control valve and the liquid air control pump are opened under the condition that the load of the generator set is increased, and liquid oxygen and liquid nitrogen in the liquid air storage tank can be conveyed to the air separation cold box through the second liquid air pipeline; under the condition that the load of the generator set is reduced, the first liquid air control valve is opened, the second liquid air control valve and the liquid air control pump are closed, and liquid oxygen and liquid nitrogen in the air separation cold box can be conveyed to the liquid oxygen storage tank through the first liquid air pipeline.
Further, empty cold box that divides is equipped with the rectifying column, the rectifying column is including the last tower that sets gradually, condensation evaporator and lower tower, go up the tower, condensation evaporator and lower tower communicate in proper order, the air that empty cold box acquireed will get into in the rectifying column and be rectified treatment, so that the last tower acquires gaseous oxygen, and lower tower bottom acquires liquid oxygen and liquid nitrogen, gaseous oxygen accessible condensation evaporator in the last tower and the liquid oxygen interconversion in the lower tower, gaseous nitrogen accessible condensation evaporator in the last tower and the liquid nitrogen interconversion in the lower tower, the rectifying column links to each other with liquid oxygen storage tank, liquid nitrogen storage tank and liquid air storage tank pipeline respectively.
Further, the number of the rectifying towers is two.
Furthermore, the air separation adjusting system also comprises an air compressor unit, the air compressor unit is connected with the air separation cold box pipeline, and the air compressor unit can compress air and then input the air into the air separation cold box.
Furthermore, the air separation regulating system also comprises an air pre-cooling purification module, the air pre-cooling purification module comprises an air pre-cooling unit and an air purification unit, the air compressor unit, the air pre-cooling unit, the air purification unit and the air separation cold box are sequentially connected through pipelines, and air enters the air separation cold box after being sequentially subjected to compression treatment of the air compressor unit, pre-cooling treatment of the air pre-cooling unit and purification treatment of the air purification unit.
The technical scheme adopted by the application can achieve the following beneficial effects:
this application is through optimizing air separation governing system, specifically including empty cold box and liquid oxygen basin of dividing for setting up, wherein generating set and liquid oxygen basin respectively the empty cold box of dividing of tube coupling, empty cold box of dividing can separate the air that obtains to generate gaseous oxygen, liquid oxygen, gaseous oxygen in the empty cold box of dividing can carry to generating set, liquid oxygen can be in empty cold box of dividing and circulate between the liquid oxygen basin, gaseous oxygen and liquid oxygen can be in empty cold box of dividing each other the change.
Therefore, under the condition that the load of the generator set is increased, the liquid oxygen in the liquid oxygen storage tank can be conveyed to the air separation cold box to increase the oxygen content of the air separation cold box, and further increase the oxygen supply amount to the generator set; and under the condition that the load of the generator set is reduced, the liquid oxygen in the air separation cold box can be conveyed to the liquid oxygen storage tank so as to reduce the oxygen content of the air separation cold box and further reduce the oxygen supply amount to the generator set.
Therefore, the air separation adjusting system can quickly respond to the load change of the coal-fired power plant in such a way so as to meet the requirement of oxygen-enriched combustion.
Drawings
Fig. 1 is a diagram of an air separation conditioning system disclosed in the present application.
Description of reference numerals:
100-a generator set,
200-air separation cold box, 210-rectifying tower, 211-upper tower, 212-condensation evaporator, 213-lower tower,
300-liquid oxygen storage tank, 400-liquid nitrogen storage tank, 500-liquid air storage tank,
310-a first liquid oxygen pipeline, 311-a first liquid oxygen control valve, 320-a second liquid oxygen pipeline, 321-a second liquid oxygen control valve, 322-a liquid oxygen control pump, 323-a liquid oxygen reflux control valve,
410-a first liquid nitrogen pipeline, 411-a first liquid nitrogen control valve, 420-a second liquid nitrogen pipeline, 421-a second liquid nitrogen control valve, 422-a liquid nitrogen control pump, 423-a liquid nitrogen reflux control valve,
510-a first liquid-air pipeline, 511-a first liquid-air control valve, 520-a second liquid-air pipeline, 521-a second liquid-air control valve, 522-a liquid-air control pump, 523-a liquid-air backflow control valve,
600-air compressor set, 610-air compressor,
700-air pre-cooling purification module, 710-air pre-cooling unit, 720-air purification unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.
The application discloses an air separation conditioning system for providing oxygen to a generator set 100 to enable oxy-fuel combustion of the generator set 100, the generator set 100 typically being a coal-fired generator set. The generated energy of the generator set 100 needs to be adjusted at any time along with the change of the power grid dispatching load, so that the oxygen supply amount of the air separation regulating system needs to be timely responded and adjusted, and the problem in the related art is that the oxygen supply amount of the air separation regulating system cannot timely respond to the change of the power grid dispatching load, so that the adjustment is delayed.
Referring to fig. 1, the air separation conditioning system may include an air separation cold box 200 and a liquid oxygen storage tank 300, and the generator set 100 and the liquid oxygen storage tank 300 are respectively connected to the air separation cold box 200, for example, they are connected by a pipeline.
The air separation cold box 200 is a set of efficient, heat-insulating and cold-insulating low-temperature heat exchange equipment, and is often used in a cryogenic separation process to realize gas-liquid separation of mixed gas, and specifically, the air separation cold box 200 can separate obtained air to generate gaseous oxygen and liquid oxygen, wherein the gaseous oxygen refers to oxygen in a gas form so as to be distinguished from the liquid oxygen. Gaseous oxygen in the air separation cold box 200 may be delivered to the genset 100 to meet the oxycombustion requirements of the genset 100. Liquid oxygen may be circulated between the air separation cold box 200 and the liquid oxygen storage tank 300, and gaseous oxygen and liquid oxygen may be converted to each other in the air separation cold box 200 to maintain the cold balance of the air separation cold box 200.
Under the condition that the load of the generator set 100 is increased, the demand of the gaseous oxygen of the generator set 100 is increased, and at the moment, the liquid oxygen in the liquid oxygen storage tank 300 can be conveyed to the air separation cold box 200 to increase the oxygen content in the air separation cold box 200, so that the oxygen supply amount of the air separation cold box 200 to the generator set 100 is increased.
Under the condition that the load of the generator set 100 is reduced, the requirement of the gas oxygen of the generator set 100 is reduced, and at the moment, the liquid oxygen in the air separation cold box 200 can be conveyed to the liquid oxygen storage tank 300 so as to reduce the oxygen content in the air separation cold box 200 and further reduce the oxygen supply amount of the air separation cold box 200 to the generator set 100.
It can be seen that the temporary storage of liquid oxygen by the liquid oxygen storage tank 300 can timely adjust the oxygen content in the air separation cold box 200, so that the air separation cold box 200 can timely adjust the oxygen supply amount, and further the air separation adjusting system can quickly respond to the load change of the generator set 100, thereby avoiding response lag.
Further, since the cold in the air separation cold box 200 needs to be kept in balance, the adjustment of the amount of supplied oxygen is accompanied by the adjustment of the cold. Therefore, the air separation adjusting system can be arranged to further comprise a liquid nitrogen storage tank 400.
The air separation cold box 200 can also separate the captured air to produce liquid nitrogen and gaseous nitrogen, where gaseous nitrogen refers to nitrogen in gaseous form to distinguish it from liquid nitrogen. Liquid nitrogen can circulate between the air separation cold box 200 and the liquid nitrogen storage tank 400, and the liquid nitrogen and the gaseous nitrogen can be mutually converted in the air separation cold box 200, so that the cold energy of the air separation cold box 200 can be kept in balance.
Specifically, in the case of an increased load on the generator set 100, the empty cold box 200 will receive liquid oxygen from the liquid oxygen storage tank 300, and thus the empty cold box 200 will also increase, so that it is necessary to transfer liquid nitrogen in the empty cold box 200 to the liquid nitrogen storage tank 400 in order to maintain the cold balance in the empty cold box 200 in this way.
Similarly, in the event of a reduced load on the generator set 100, the air separation cold box 200 will deliver liquid oxygen to the liquid oxygen storage tank 300, at which time the liquid nitrogen in the liquid nitrogen storage tank 400 can be delivered to the air separation cold box 200 to maintain the cold balance in the air separation cold box 200.
Further, the air separation conditioning system also includes a liquid air storage tank 500, and the liquid air storage tank 500 functions similarly to the liquid oxygen storage tank 300 and can condition the oxygen content in the air separation cold box 200, except that the liquid air storage tank 500 is used for storing liquid nitrogen and liquid oxygen, and both the liquid nitrogen and the liquid oxygen can be circulated in the air separation cold box 200 and between the liquid air storage tank 500.
In the event of an increased load on genset 100, both liquid nitrogen and liquid oxygen from liquid air tank 500 may be delivered to air separation cold box 200 to increase the oxygen content of air separation cold box 200 and thereby increase the oxygen supply to genset 100.
In the event of a reduced load on genset 100, both liquid nitrogen and liquid oxygen in air separation cold box 200 may be delivered to liquid air storage tank 500 to reduce the oxygen content of air separation cold box 200 and thereby reduce the oxygen supply to genset 100.
In an alternative embodiment, a first liquid oxygen line 310 and a second liquid oxygen line 320 may be provided between the air separation cold box 200 and the liquid oxygen storage tank 300. The first liquid oxygen pipeline 310 is provided with a first liquid oxygen control valve 311, and the second liquid oxygen pipeline 320 is provided with a second liquid oxygen control valve 321 and a liquid oxygen control pump 322.
Under the condition that the load of the generator set 100 is increased, the first liquid oxygen control valve 311 is closed, the second liquid oxygen control valve 321 and the liquid oxygen control pump 322 are opened, the liquid oxygen control pump 322 can provide power for liquid oxygen to circulate, and liquid oxygen in the liquid oxygen storage tank 300 can be conveyed to the air separation cold box 200 through the second liquid oxygen pipeline 320, so that the air separation cold box 200 can increase the oxygen supply amount.
When the load of the generator set 100 is reduced, the first liquid oxygen control valve 311 is opened, the second liquid oxygen control valve 321 and the liquid oxygen control pump 322 are closed, and the liquid oxygen in the air separation cold box 200 is conveyed to the liquid oxygen storage tank 300 through the first liquid oxygen pipeline 310 by utilizing the pressure difference between the air separation cold box 200 and the liquid oxygen storage tank 300. By the method, the control on the input and output of liquid oxygen can be further improved, the adjusting capacity of the air separation cold box 200 on the oxygen supply amount is further improved, and the response capacity of the air separation cold box 200 on the load change of the generator set 100 is further improved.
Similarly, a first liquid nitrogen pipeline 410 and a second liquid nitrogen pipeline 420 can be arranged between the air separation cold box 200 and the liquid nitrogen storage tank 400, the first liquid nitrogen pipeline 410 is provided with a first liquid nitrogen control valve 411, and the second liquid nitrogen pipeline 420 is provided with a second liquid nitrogen control valve 421 and a liquid nitrogen control pump 422.
In case of increasing the load of the generator set 100, the first liquid nitrogen control valve 411 is opened, the second liquid nitrogen control valve 421 and the liquid nitrogen control pump 422 are closed, and the liquid nitrogen in the air separation cold box 200 can be conveyed to the liquid nitrogen storage tank 400 through the first liquid nitrogen pipeline 410 to maintain the balance of cold.
In the event of a reduced load on genset 100, first liquid nitrogen control valve 411 is closed, second liquid nitrogen control valve 421 and liquid nitrogen control pump 422 are opened, and liquid nitrogen in liquid nitrogen storage tank 400 can be delivered to air separation cold box 200 via second liquid nitrogen line 420. So as to further improve the control of the input and output of the liquid nitrogen and better maintain the cold balance of the air separation cold box 200.
Similarly, a first liquid-air pipeline 510 and a second liquid-air pipeline 520 may be disposed between the air separation cooling tank 200 and the liquid-air storage tank 500, the first liquid-air pipeline 510 is provided with a first liquid-air control valve 511, the second liquid-air pipeline 520 is provided with a second liquid-air control valve 521 and a liquid-air control pump 522,
in the event of an increase in the load on the generator set 100, the first pneumatic control valve 511 is closed, the second pneumatic control valve 521 and the pneumatic control pump 522 are opened, and liquid oxygen and liquid nitrogen in the pneumatic tank 500 may be delivered to the air separation cold box 200 via the second pneumatic line 520 to increase the oxygen supply.
In the event of a reduction in the load on the generator set 100, the first pneumatic control valve 511 is opened, the second pneumatic control valve 521 and the pneumatic control pump 522 are closed, and liquid oxygen and liquid nitrogen in the air separation cold box 200 can be delivered to the liquid oxygen tank 300 via the first pneumatic line 510 to reduce the oxygen supply.
Further, the second liquid oxygen pipeline 320 may be provided with a liquid oxygen reflux control valve 323, and the liquid oxygen reflux control valve 323 is connected in parallel with the second liquid oxygen control valve 321. The air separation cold box 200, the second liquid oxygen control valve 321, the liquid oxygen control pump 322 and the liquid oxygen storage tank 300 are sequentially connected through pipelines, and the liquid oxygen reflux control valve 323 is respectively connected with the liquid oxygen control pump 322 and the liquid oxygen storage tank 300 through pipelines. When the second liquid oxygen control valve 321 and the liquid oxygen control pump 322 are opened, the liquid oxygen reflux control valve 323 is also opened, and a part of the liquid oxygen in the liquid oxygen storage tank 300 is refluxed to the liquid oxygen storage tank 300 through the liquid oxygen control pump 322 and the liquid oxygen reflux control valve 323 in sequence.
Further, the second liquid nitrogen pipeline 420 may be provided with a liquid nitrogen reflux control valve 423, and the liquid nitrogen reflux control valve 423 is connected in parallel with the second liquid nitrogen control valve 421. The air separation cold box 200, the second liquid nitrogen control valve 421, the liquid nitrogen control pump 422 and the liquid nitrogen storage tank 400 are sequentially connected through pipelines, and the liquid nitrogen reflux control valve 423 is respectively connected with the liquid nitrogen control pump 422 and the liquid nitrogen storage tank 400 through pipelines. Under the condition that the second liquid nitrogen control valve 421 and the liquid nitrogen control pump 422 are opened, the liquid nitrogen backflow control valve 423 is also opened, and part of liquid nitrogen in the liquid nitrogen storage tank 400 flows back to the liquid nitrogen storage tank 400 through the liquid nitrogen control pump 422 and the liquid nitrogen backflow control valve 423 in sequence.
Further, the second liquid-air pipeline 520 may be provided with a liquid-air backflow control valve 523, and the liquid-air backflow control valve 523 is connected in parallel with the second liquid-air control valve 521. The air separation cooling box 200, the second liquid air control valve 521, the liquid air control pump 522 and the liquid air storage tank 500 are sequentially connected through pipelines, and the liquid air reflux control valve 523 is respectively connected with the liquid air control pump 522 and the liquid air storage tank 500 through pipelines. When the second liquid air control valve 521 and the liquid air control pump 522 are opened, the liquid air reflux control valve 523 is also opened, and part of the liquid nitrogen and the liquid oxygen in the liquid air tank 500 are refluxed to the liquid air tank 500 through the liquid air control pump 522 and the liquid air reflux control valve 523 in sequence.
Further, a rectifying tower 210 is arranged in the air separation cold box 200, and the rectifying tower 210 is a tower type vapor-liquid contact device for rectifying. The light component (low-boiling substance) in the liquid phase is transferred into the gas phase, and the heavy component (high-boiling substance) in the gas phase is transferred into the liquid phase by utilizing the property that each component in the mixture has different volatility, namely, the vapor pressure of each component at the same temperature is different, so that the aim of separation is fulfilled.
Specifically, the rectifying column 210 includes an upper column 211, a condensing evaporator 212, and a lower column 213 that are sequentially provided, and the upper column 211, the condensing evaporator 212, and the lower column 213 are sequentially communicated. The air obtained in the air separation cold box 200 enters the rectifying tower 210 and is rectified by the rectifying tower 210, so that the upper tower 211 obtains gaseous oxygen and the lower tower 213 obtains liquid oxygen and liquid nitrogen. Specifically, gaseous nitrogen is produced at the top of lower column 213 and liquid oxygen and liquid nitrogen are taken at the bottom of lower column 213. Wherein the gaseous oxygen in the upper column 211 can be interconverted with the liquid oxygen in the lower column 213 via the condensing evaporator 212.
The rectifying tower 210 is respectively connected with the liquid oxygen storage tank 300, the liquid nitrogen storage tank 400 and the liquid air storage tank 500 through pipelines. Specifically, the liquid oxygen tank 300 is connected to the lower column 213 and the upper column 211, the liquid nitrogen tank 400 is connected to the lower column 213 and the upper column 211, and the liquid air tank 500 is connected to the lower column 213 and the upper column 211.
Thus, in the event of an increased load on the power generation unit 100, the liquid oxygen in the liquid oxygen storage tank 300 and/or the liquid nitrogen storage tank 500 will pass into the air separation cold box 200 and flow from the upper column 211 into the lower column 213, while the liquid nitrogen in the rectification column 210 will pass into the liquid nitrogen storage tank 400.
In the event of a reduced load on the power plant 100, the liquid oxygen in the air separation cold box 200 will be transferred to the liquid oxygen storage tank 300 and/or the liquid air storage tank 500, while the liquid oxygen in the liquid nitrogen storage tank 400 will be passed into the air separation cold box 200 and from the upper column 211 to the lower column 213.
Further, the rectifying tower 210 may be provided with two rectifying towers, one of which is used as a main rectifying tower and the other is used as an auxiliary rectifying tower, so as to better circulate the liquid oxygen and the liquid nitrogen.
In a more specific embodiment, the air separation conditioning system may further include an air compressor unit 600, the air compressor unit 600 is connected to the air separation cold box 200 through a pipeline, and the air compressor unit 600 may compress the air and then input the compressed air into the air separation cold box 200, so as to facilitate the air separation cold box 200 to more effectively obtain air.
More specifically, the air compressor assembly 600 may include a plurality of parallel air compressors 610, for example, three air compressors 610 connected in parallel, and each air compressor 610 may compress air.
Further, the air separation conditioning system further comprises an air pre-cooling purification module 700, the air pre-cooling purification module 700 comprises an air pre-cooling unit 710 and an air purification unit 720, and the air compressor unit 600, the air pre-cooling unit 710, the air purification unit 720 and the air separation cold box 200 are sequentially connected through a pipeline.
The air pre-cooling unit 710 can pre-cool air, and can better ensure the cooling capacity of the air separation cooling box 200, and the air purification unit 720 can purify air to filter out impurity gases. Specifically, the air enters the air separation cold box 200 after being sequentially subjected to compression treatment by the air compressor unit 600, precooling treatment by the air precooling unit 710 and purification treatment by the air purification unit 720, so as to improve the overall quality of the air obtained by the air separation cold box 200.
In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. An air separation conditioning system for providing gaseous oxygen to a power generating unit (100), characterized by: comprises an air separation cold box (200) and a liquid oxygen storage tank (300), wherein the generator set (100) and the liquid oxygen storage tank (300) are respectively communicated with the air separation cold box (200),
the air separation cold box (200) can separate the obtained air to generate gaseous oxygen and liquid oxygen, the gaseous oxygen in the air separation cold box (200) can be conveyed to the generator set (100), the liquid oxygen can circulate between the air separation cold box (200) and the liquid oxygen storage tank (300), and the gaseous oxygen and the liquid oxygen can be mutually converted in the air separation cold box (200),
in case of an increased load on the generator set (100), the liquid oxygen in the liquid oxygen tank (300) may be transferred to the air separation cold box (200),
the liquid oxygen in the air separation cold box (200) may be transferred to the liquid oxygen storage tank (300) in case of a reduced load of the generator set (100).
2. A space division conditioning system according to claim 1, characterized in that: the air separation regulating system also comprises a liquid nitrogen storage tank (400),
the air separation cold box (200) is operable to separate the captured air to produce liquid nitrogen and gaseous nitrogen, the liquid nitrogen being communicable between the air separation cold box (200) and the liquid nitrogen storage tank (400), the liquid nitrogen and the gaseous nitrogen being convertible between each other in the air separation cold box (200),
the liquid nitrogen in the air separation cold box (200) can be delivered to the liquid nitrogen storage tank (400) under the condition that the load of the generator set (100) is increased,
the liquid nitrogen in the liquid nitrogen storage tank (400) may be delivered to the air separation cold box (200) with a reduced load on the generator set (100).
3. A space division conditioning system according to claim 2, characterized in that: the air separation regulating system also comprises a liquid air storage tank (500),
both the liquid nitrogen and the liquid oxygen can circulate between the air separation cold box (200) and the liquid air storage tank (500),
in the event of an increase in the load on the generator set (100), both the liquid nitrogen and the liquid oxygen in the liquid air tank (500) can be delivered to the air separation cold box (200),
in the event of a reduction in the load on the generator set (100), both the liquid nitrogen and the liquid oxygen in the air separation cold box (200) can be delivered to the liquid sump (500).
4. A space division conditioning system according to claim 1, characterized in that:
a first liquid oxygen pipeline (310) and a second liquid oxygen pipeline (320) are arranged between the air separation cold box (200) and the liquid oxygen storage tank (300), the first liquid oxygen pipeline (310) is provided with a first liquid oxygen control valve (311), the second liquid oxygen pipeline (320) is provided with a second liquid oxygen control valve (321) and a liquid oxygen control pump (322),
in case of load increase of the generator set (100), the first liquid oxygen control valve (311) is closed, the second liquid oxygen control valve (321) and the liquid oxygen control pump (322) are opened, and the liquid oxygen in the liquid oxygen storage tank (300) can be conveyed to the air separation cold box (200) through the second liquid oxygen pipeline (320);
in the case of a reduction in the load of the generator set (100), the first liquid oxygen control valve (311) is opened, the second liquid oxygen control valve (321) and the liquid oxygen control pump (322) are closed, and the liquid oxygen in the air separation cold box (200) can be transferred to the liquid oxygen storage tank (300) through the first liquid oxygen pipeline (310).
5. A space division conditioning system according to claim 2, characterized in that:
a first liquid nitrogen pipeline (410) and a second liquid nitrogen pipeline (420) are arranged between the air separation cold box (200) and the liquid nitrogen storage tank (400), the first liquid nitrogen pipeline (410) is provided with a first liquid nitrogen control valve (411), the second liquid nitrogen pipeline (420) is provided with a second liquid nitrogen control valve (421) and a liquid nitrogen control pump (422),
in case of load increase of the generator set (100), the first liquid nitrogen control valve (411) is opened, the second liquid nitrogen control valve (421) and the liquid nitrogen control pump (422) are closed, the liquid nitrogen in the air separation cold box (200) can be conveyed to the liquid nitrogen storage tank (400) through the first liquid nitrogen pipeline (410),
in case of a reduced load of the generator set (100), the first liquid nitrogen control valve (411) is closed, the second liquid nitrogen control valve (421) and the liquid nitrogen control pump (422) are opened, and the liquid nitrogen in the liquid nitrogen storage tank (400) can be delivered to the air separation cold box (200) through the second liquid nitrogen pipeline (420).
6. A space division conditioning system according to claim 3, characterized in that:
a first liquid-air pipeline (510) and a second liquid-air pipeline (520) are arranged between the air separation cold box (200) and the liquid-air storage tank (500), the first liquid-air pipeline (510) is provided with a first liquid-air control valve (511), the second liquid-air pipeline (520) is provided with a second liquid-air control valve (521) and a liquid-air control pump (522),
in case of an increase in the load of the generator set (100), the first liquid-air control valve (511) is closed, the second liquid-air control valve (521) and the liquid-air control pump (522) are opened, and both the liquid oxygen and the liquid nitrogen in the liquid-air tank (500) can be delivered to the air-air cooling box (200) through the second liquid-air pipeline (520);
in case of a load reduction of the generator set (100), the first liquid air control valve (511) is opened, the second liquid air control valve (521) and the liquid air control pump (522) are closed, and both the liquid oxygen and the liquid nitrogen in the air separation cold box (200) can be conveyed to the liquid oxygen storage tank (300) through the first liquid air pipeline (510).
7. A space division conditioning system according to claim 3, characterized in that: a rectifying tower (210) is arranged in the air separation cold box (200), the rectifying tower (210) comprises an upper tower (211), a condensation evaporator (212) and a lower tower (213) which are arranged in sequence, the upper tower (211), the condensation evaporator (212) and the lower tower (213) are communicated in sequence,
the air obtained in the air separation cold box (200) enters the rectifying tower (210) to be rectified so that the upper tower (211) obtains gaseous oxygen and the bottom of the lower tower (213) obtains liquid oxygen and liquid nitrogen,
the gaseous oxygen in the upper column (211) can be interconverted with the liquid oxygen in the lower column (213) by means of the condenser-evaporator (212), the gaseous nitrogen in the upper column (211) can be interconverted with the liquid nitrogen in the lower column (213) by means of the condenser-evaporator (212),
the rectifying tower (210) is respectively connected with the liquid oxygen storage tank (300), the liquid nitrogen storage tank (400) and the liquid air storage tank (500) through pipelines.
8. A space division conditioning system according to claim 7, wherein: the number of the rectifying towers (210) is two.
9. A space division conditioning system according to claim 1, characterized in that: the air separation adjusting system further comprises an air compressor unit (600), the air compressor unit (600) is connected with the air separation cold box (200) through a pipeline, and the air compressor unit (600) can compress air and then input the air separation cold box (200).
10. A space division conditioning system according to claim 9, characterized in that: the air separation regulating system also comprises an air pre-cooling purification module (700), the air pre-cooling purification module (700) comprises an air pre-cooling unit (710) and an air purification unit (720), the air compressor unit (600), the air pre-cooling unit (710), the air purification unit (720) and the air separation cold box (200) are sequentially connected through pipelines,
and the air enters the air separation cold box (200) after being sequentially subjected to compression treatment of the air compressor unit (600), precooling treatment of the air precooling unit (710) and purification treatment of the air purification unit (720).
CN202122559784.XU 2021-10-22 2021-10-22 Air separation adjusting system Active CN216245125U (en)

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