CN214371300U - High-efficient carbon dioxide condensing equipment - Google Patents

High-efficient carbon dioxide condensing equipment Download PDF

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Publication number
CN214371300U
CN214371300U CN202120338262.4U CN202120338262U CN214371300U CN 214371300 U CN214371300 U CN 214371300U CN 202120338262 U CN202120338262 U CN 202120338262U CN 214371300 U CN214371300 U CN 214371300U
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China
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carbon dioxide
ammonia
cooling
outlet
cooling area
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CN202120338262.4U
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Inventor
韩晓琢
闫志贤
毛燕香
李剑川
李强
曹雁晋
常亮
闫曌
杨阳
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Tianji Group Applied Chemical Co ltd
Tianji Coal Chemical Industry Group Co Ltd
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Tianji Group Applied Chemical Co ltd
Tianji Coal Chemical Industry Group 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0027—Oxides of carbon, e.g. CO2
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0204—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0258—Construction and layout of liquefaction equipments, e.g. valves, machines vertical layout of the equipments within in the cold box
    • 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
    • F25J2210/90—Boil-off gas from storage
    • 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
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/80—Separating impurities from carbon dioxide, e.g. H2O or water-soluble contaminants
    • F25J2220/82—Separating low boiling, i.e. more volatile components, e.g. He, H2, CO, Air gases, CH4
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/90—Processes or apparatus involving steps for recycling of process streams the recycled stream being boil-off gas from storage
    • 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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The utility model discloses a high-efficient carbon dioxide condensing equipment. The method of the utility model comprises the following steps: the device comprises a refrigerating system and a condensing and liquefying system, wherein the refrigerating system comprises a screw refrigerating unit consisting of an ice maker, an ammonia condenser and a liquid nitrogen storage tank which are sequentially connected through a pipeline; the condensation liquefaction system comprises a carbon dioxide condenser, the carbon dioxide condenser comprises a condensation area, a cooling area and a pre-cooling area which are arranged from bottom to top, a carbon dioxide liquid phase outlet is arranged at the bottom of the condensation area, an ammonia vapor outlet is arranged at the upper side of the cooling area, a cooling ammonia inlet is arranged at the lower side of the cooling area, a non-condensable gas outlet is arranged at the top of the pre-cooling area, and a carbon dioxide gas phase inlet is arranged at one side of the pre-cooling area; the inlet of the ice maker is connected with the ammonia vapor outlet through a pipeline, and the outlet of the liquid nitrogen storage tank is connected with the cooling ammonia inlet through a pipeline to form closed circulation. The utility model discloses can retrieve carbon dioxide flash distillation vapour, can assist the methane carbon dioxide mixture separation after adopting coal bed gas with carbon dioxide.

Description

High-efficient carbon dioxide condensing equipment
Technical Field
The utility model belongs to the technical field of the carbon dioxide liquefaction purification, concretely relates to high-efficient carbon dioxide condensing equipment.
Background
The coal bed gas refers to CH accumulated in the coal bed4The main component is hydrocarbon gas which is adsorbed on the surface of coal matrix particles and partially dissociated in coal pores or dissolved in coal bed water. China has abundant coal bed gas resources and huge geological reserves, and the development and utilization of the coal bed gas resources can make up the defects of conventional oil gas resources to a certain extent.
The coal bed gas is a high-efficiency clean energy, and the development and utilization of the coal bed gas not only have important significance on global warming, can reduce the emission of greenhouse gas, protect the atmospheric environment, slow down the global warming trend and the pace of energy crisis, but also can reduce the disaster degree of mines and reduce the production cost. At present, natural gas exploration and development in China are still in a starting stage, wherein a gas injection exploitation technology is substantially developed to a certain extent, corresponding technology development enters an implementation and application stage, and a coal bed methane carbon dioxide separation technology and equipment matched with the technology are in a development and exploration stage.
The equipment for liquefying and purifying carbon dioxide is single in later development of the carbon dioxide liquefying and purifying technology in China, mainly takes high-yield large-scale equipment as main equipment, has independent equipment configuration functions, simple and extensive structure, large volume and higher operation capacity consumption, and cannot be matched with a coal bed methane carbon dioxide separating and liquefying device for use. Because the connection of the carbon dioxide production system and the storage system has a pressure difference, about 3-6% of liquid carbon dioxide enters a product storage tank through decompression and flash evaporation occurs to cause product loss. In the prior art, most of the carbon dioxide liquefying devices are additionally provided with a subcooler before products enter the storage tank, so that the saturation of the carbon dioxide in the liquid in the tank is reduced to achieve the purpose of reducing the quantity of the flash carbon dioxide, but the temperature of the carbon dioxide in the liquid in the tank is reduced, the amount of cold stored in the carbon dioxide is reduced, and the heat brought out by the flash evaporation of the carbon dioxide under reduced pressure is difficult to compensate, so that the effect is limited, and technical equipment adapted to the carbon dioxide is needed to solve the problem of flash evaporation loss of the carbon dioxide more effectively.
In order to solve the problems, the utility model provides a high-efficient carbon dioxide condensing equipment, adopt refrigerating system and condensation liquefaction system, refrigerating system is the ice maker, the screw rod refrigerating unit that condenser and liquid ammonia storage tank are constituteed, refrigerating system provides required cold volume for system carbon dioxide condensing process, condensing system is combination formula condenser, with the carbon dioxide precooling, the three process combination of cooling and condensation, combination formula condenser has that medium circulation process flow is short, system cold volume utilizes reasonable energy consumption low, the equipment layout compactness integrated level in the device is high, advantages such as equipment operation is simple trouble few, can retrieve the flash steam of carbon dioxide apparatus for producing, reduce product production consumption; the method can separate the methane and carbon dioxide mixture after the carbon dioxide helps to produce the coal bed gas, improves the quality and recovery rate of the coal bed gas, liquefies and recovers the carbon dioxide in the methane and carbon dioxide mixture, has the reinjection requirement and ensures that the product quality reaches the GB/T6052-2011 industrial carbon dioxide quality standard.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art, the utility model provides a high-efficiency carbon dioxide condensing device, adopt a refrigerating system and a condensation liquefaction system, the refrigerating system is a screw refrigerating unit consisting of an ice maker, a condenser and a liquid ammonia storage tank, the refrigerating system provides required cold energy for the carbon dioxide condensation process of the system, the condensing system is a combined condenser, the three processes of carbon dioxide precooling, cooling and condensing are combined, the combined condenser has the advantages of short medium circulation process flow, reasonable utilization of the cold energy of the system, low energy consumption, compact equipment arrangement and high integration level in the device, simple equipment operation, few faults and the like, the flash steam of the carbon dioxide production device can be recovered, and the product production consumption is reduced; the method can separate the methane and carbon dioxide mixture after the carbon dioxide helps to produce the coal bed gas, improves the quality and recovery rate of the coal bed gas, liquefies and recovers the carbon dioxide in the methane and carbon dioxide mixture, has the reinjection requirement and ensures that the product quality reaches the GB/T6052-2011 industrial carbon dioxide quality standard.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a high-efficiency carbon dioxide condensing device comprises a refrigerating system and a condensing and liquefying system, wherein the refrigerating system comprises a screw refrigerating unit consisting of an ice maker, an ammonia condenser and a liquid nitrogen storage tank which are sequentially connected through a pipeline, an ammonia evaporation pressure regulating valve is arranged at an inlet of the ice maker, and an ammonia liquid level regulating valve is arranged at an outlet of the liquid nitrogen storage tank; the condensation and liquefaction system comprises a carbon dioxide condenser, the carbon dioxide condenser comprises a condensation area, a cooling area and a pre-cooling area which are arranged from bottom to top, a carbon dioxide liquid phase outlet is arranged at the bottom of the condensation area, an ammonia vapor outlet is arranged at the upper side of the cooling area, a cooling ammonia inlet is arranged at the lower side of the cooling area, a non-condensable gas outlet is arranged at the top of the pre-cooling area, and a carbon dioxide gas phase inlet is arranged at one side of the pre-cooling area; the inlet of the ice maker is connected with the ammonia vapor outlet through a pipeline, and the outlet of the liquid nitrogen storage tank is connected with the cooling ammonia inlet through a pipeline to form closed circulation.
Preferably, the device adopts integrated sled dress design, and the equipment integral movement installation of being convenient for.
Wherein ammonia evaporation pressure governing valve is used for adjusting the pressure value of ammonia vapour, and ammonia liquid level regulating valve is used for adjusting the pressure value of liquid ammonia, and the pressure value is adjusted according to the carbon dioxide volume of waiting to cool off in the carbon dioxide condenser during practical application.
Specifically, when the device is applied to flash steam recovery of a carbon dioxide production device, after the flash steam comes to a liquid carbon dioxide storage tank of a production system, the carbon dioxide flash steam enters a carbon dioxide condenser from a carbon dioxide gas phase inlet through a pipeline, and is precooled, cooled and condensed under the action of a refrigeration system and then falls back to the carbon dioxide storage tank by utilizing a potential difference.
Specifically, when the device is applied to separation and liquefaction of coal bed methane and carbon dioxide, coal bed methane from a well site enters a carbon dioxide condenser from a carbon dioxide gas phase inlet after membrane separation, pressurization and dehydration, enters a carbon dioxide storage tank after precooling, cooling and condensation under the action of a refrigeration system, and a non-condensable methane component returns to the membrane separation device.
Specifically, the high-efficiency carbon dioxide condensation method comprises the following steps:
(I): carbon dioxide gas from the system enters a carbon dioxide condenser from a carbon dioxide gas phase inlet under the pressure of 1.8Mpa, and enters a cooling area after being pre-cooled in a pre-cooling area and non-condensable gas in the system through heat exchange; the non-condensable gas rises to the top along the tube wall of the carbon dioxide condenser, is subjected to heat exchange and then is discharged from a non-condensable gas outlet;
(II): liquid nitrogen enters a cooling area from a liquid ammonia storage tank through a pipeline from a cooling ammonia inlet, and after heat exchange is carried out between cooling ammonia and liquid carbon dioxide, the liquid carbon dioxide enters a condensation area, flows into the bottom along the pipe wall and is sent into the storage tank; the ammonia vapor is discharged from the ammonia vapor outlet and sent to an ice machine through a pipeline to be cooled, and then enters an ammonia condenser and a liquid ammonia storage tank to form a closed cycle.
During use, the pressure values of the ammonia vapor and the liquid ammonia are adjusted according to the amount of carbon dioxide to be cooled in the carbon dioxide condenser.
The utility model has the advantages that:
the utility model discloses a refrigerating system and condensation liquefaction system, refrigerating system is the screw rod refrigerating unit that ice maker, condenser and liquid ammonia storage tank are constituteed, refrigerating system provides required cold volume for system carbon dioxide condensation process, condensing system is the combination formula condenser, with the combination of carbon dioxide precooling, three processes of cooling and condensation, the combination formula condenser has that medium circulation process flow is short, the system cold volume utilizes reasonable energy consumption low, the compact integrated level of equipment layout is high in the device, advantages such as equipment operation is simple trouble few, can retrieve the flash distillation vapour of carbon dioxide apparatus for producing, reduce product production consumption; the utility model adopts the design of integral skid-mounted, and can be integrally moved, installed and applied; the utility model can be directly installed on a coal bed gas mining device to separate methane and carbon dioxide, liquefy and purify the carbon dioxide, and improve the quality and recovery rate of the coal bed gas; the device can also be directly matched with a liquid carbon dioxide production and storage device to recover the flash evaporation carbon dioxide, so that the consumption of carbon dioxide production is reduced and the recovery rate of the carbon dioxide is improved.
By adopting the scheme, the utility model can provide the required cooling capacity for recovering the flash steam, and ensure the recovery efficiency of the flash steam; the combined condenser adopted by the utility model has short medium circulation process, reasonable utilization of system cold energy and low energy consumption, compact equipment arrangement and high integration level in the device, simple equipment operation and few faults; the device of the utility model can be moved integrally and installed and applied; the utility model discloses can direct mount to coal bed gas exploitation device, carry out the separation of carbon dioxide and methane, also can directly produce and storage device is supporting with liquid carbon dioxide carries out the recovery of flash distillation carbon dioxide, reduces the consumption of carbon dioxide production and improves the rate of recovery of carbon dioxide.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic view of the flow structure of the apparatus according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of the flow structure of the apparatus according to embodiment 2 of the present invention.
Fig. 3 is a schematic view of the apparatus flow structure according to embodiment 3 of the present invention.
In the figure, 1-carbon dioxide condenser, 11-condensation zone, 12-cooling zone, 13-pre-cooling zone, 2-ammonia evaporation pressure regulating valve, 3-ice maker, 4-ammonia condenser, 5-liquid nitrogen storage tank, 6-ammonia liquid level regulating valve, 7-high efficiency carbon dioxide condensing device, 8-rectifying tower, 9-carbon dioxide storage tank, 14-membrane separator, 15-compressor, 16-dryer.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Example 1:
as shown in fig. 1, a high-efficiency carbon dioxide condensing device comprises a refrigerating system and a condensing and liquefying system, wherein the refrigerating system comprises a screw refrigerating unit consisting of an ice maker 3, an ammonia condenser 4 and a liquid nitrogen storage tank 5 which are sequentially connected through a pipeline, an inlet of the ice maker 3 is provided with an ammonia evaporation pressure regulating valve 2, and an outlet of the liquid nitrogen storage tank 5 is provided with an ammonia liquid level regulating valve 6; the condensation liquefaction system comprises a carbon dioxide condenser 1, the carbon dioxide condenser 1 comprises a condensation area 11, a cooling area 12 and a pre-cooling area 13 which are arranged from bottom to top, a carbon dioxide liquid phase outlet is arranged at the bottom of the condensation area 11, an ammonia vapor outlet is arranged at the upper side of the cooling area 12, a cooling ammonia inlet is arranged at the lower side of the cooling area 12, a non-condensable gas outlet is arranged at the top of the pre-cooling area 13, and a carbon dioxide gas phase inlet is arranged at one side of the pre-cooling area 13; an inlet of the ice maker 3 is connected with an ammonia vapor outlet through a pipeline, and an outlet of the liquid nitrogen storage tank 5 is connected with a cooling ammonia inlet through a pipeline to form closed circulation.
Preferably, the device adopts integrated sled dress design, and the equipment integral movement installation of being convenient for.
Wherein the ammonia evaporation pressure regulating valve 2 is used for regulating the pressure value of ammonia vapor, the ammonia liquid level regulating valve 6 is used for regulating the pressure value of liquid ammonia, and the pressure value is regulated according to the amount of carbon dioxide to be cooled in the carbon dioxide condenser 1 in practical application.
Specifically, the high-efficiency carbon dioxide condensation method comprises the following steps:
(I): carbon dioxide gas from the system enters a carbon dioxide condenser 1 from a carbon dioxide gas phase inlet of the device under the pressure of 1.8Mpa, and enters a cooling area 12 after being pre-cooled in a pre-cooling area 13 and non-condensable gas in the system through heat exchange; the non-condensable gas rises to the top along the tube wall of the carbon dioxide condenser 1, is subjected to heat exchange and then is discharged from a non-condensable gas outlet;
(II): liquid nitrogen enters a cooling area 12 from a liquid ammonia storage tank 5 through a pipeline from a cooling ammonia inlet, and after heat exchange is carried out between cooling ammonia and liquid carbon dioxide, the liquid carbon dioxide enters a condensation area 11, flows into the bottom along the pipe wall and is sent into the storage tank as a product; the ammonia vapor is discharged from the ammonia vapor outlet and sent to an ice machine through a pipeline to be cooled, and then enters an ammonia condenser and a liquid ammonia storage tank to form a closed cycle.
During use, the pressure values of the ammonia vapor and the liquid ammonia are adjusted according to the amount of carbon dioxide to be cooled in the carbon dioxide condenser.
Example 2:
as shown in fig. 2, the high efficiency carbon dioxide condensing unit 7 described in embodiment 1 directly matches with a liquid carbon dioxide production and storage device to recover carbon dioxide flash steam, wherein a liquid carbon dioxide outlet of the rectifying tower 8 is connected to a carbon dioxide inlet of the carbon dioxide storage tank 9, a carbon dioxide inlet of the carbon dioxide storage tank 9 is directly connected to a carbon dioxide liquid phase outlet of the high efficiency carbon dioxide condensing unit 7, and a carbon dioxide steam outlet on the upper side of the carbon dioxide storage tank 9 is connected to a carbon dioxide gas phase inlet of the high efficiency carbon dioxide condensing unit 1.
Specifically, liquid carbon dioxide processed by the rectifying tower 8 enters the carbon dioxide storage tank 9, carbon dioxide flash steam in the carbon dioxide storage tank 9 enters the high-efficiency carbon dioxide condensing device 7 from a carbon dioxide steam outlet for condensation and liquefaction, and the liquid carbon dioxide after high-efficiency condensation and liquefaction falls back to enter the carbon dioxide storage tank 9, so that recovery of the carbon dioxide flash steam is realized.
Example 3:
as shown in fig. 3, the high efficiency carbon dioxide condensing unit 7 described in embodiment 1 is directly installed in a matching manner with a coal bed methane mining device, wherein the membrane separator 14, the compressor 15 and the dryer 16 are sequentially connected through a pipeline, an outlet of the dryer 16 is connected with a carbon dioxide gas phase inlet of the high efficiency carbon dioxide condensing unit 7 through a pipeline, and a carbon dioxide liquid phase outlet of the high efficiency carbon dioxide condensing unit 7 is connected with a carbon dioxide product inlet of the carbon dioxide storage tank 9.
Specifically, the coal bed gas from the well site enters a high-efficiency carbon dioxide condensing device after membrane separation, pressurization compression and dehydration drying in sequence, the coal bed gas is liquefied through high-efficiency condensation, non-condensable gas methane enters a membrane separator through non-condensable gas outlet discharge, and the carbon dioxide liquefied through high-efficiency condensation falls back to a carbon dioxide storage tank for storage, so that the separation of methane and carbon dioxide is realized, and the carbon dioxide is liquefied and purified.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (2)

1. The utility model provides a high-efficient carbon dioxide condensing equipment which characterized in that: the system comprises a refrigeration system and a condensation liquefaction system, wherein the refrigeration system comprises a screw refrigerating unit consisting of an ice maker, an ammonia condenser and a liquid nitrogen storage tank which are sequentially connected through a pipeline, an ammonia evaporation pressure regulating valve is arranged at an inlet of the ice maker, and an ammonia liquid level regulating valve is arranged at an outlet of the liquid nitrogen storage tank; the condensation and liquefaction system comprises a carbon dioxide condenser, the carbon dioxide condenser comprises a condensation area, a cooling area and a pre-cooling area which are arranged from bottom to top, a carbon dioxide liquid phase outlet is arranged at the bottom of the condensation area, an ammonia vapor outlet is arranged at the upper side of the cooling area, a cooling ammonia inlet is arranged at the lower side of the cooling area, a non-condensable gas outlet is arranged at the top of the pre-cooling area, and a carbon dioxide gas phase inlet is arranged at one side of the pre-cooling area; the inlet of the ice maker is connected with the ammonia vapor outlet through a pipeline, and the outlet of the liquid nitrogen storage tank is connected with the cooling ammonia inlet through a pipeline to form closed circulation.
2. A high efficiency carbon dioxide condensing unit according to claim 1 characterized by: the device adopts an integrated skid-mounted design.
CN202120338262.4U 2021-02-06 2021-02-06 High-efficient carbon dioxide condensing equipment Active CN214371300U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112728871A (en) * 2021-02-06 2021-04-30 天脊煤化工集团股份有限公司 Efficient carbon dioxide condensing device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112728871A (en) * 2021-02-06 2021-04-30 天脊煤化工集团股份有限公司 Efficient carbon dioxide condensing device and method

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