CN117138538A - High-temperature high-pressure gas dehumidifying device - Google Patents

High-temperature high-pressure gas dehumidifying device Download PDF

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Publication number
CN117138538A
CN117138538A CN202311320189.8A CN202311320189A CN117138538A CN 117138538 A CN117138538 A CN 117138538A CN 202311320189 A CN202311320189 A CN 202311320189A CN 117138538 A CN117138538 A CN 117138538A
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CN
China
Prior art keywords
air passage
heat exchanger
heat exchange
inlet
temperature
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Pending
Application number
CN202311320189.8A
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Chinese (zh)
Inventor
谢润之
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Hefei Swan Refrigeration Technology Co Ltd
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Hefei Swan Refrigeration Technology Co Ltd
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Application filed by Hefei Swan Refrigeration Technology Co Ltd filed Critical Hefei Swan Refrigeration Technology Co Ltd
Priority to CN202311320189.8A priority Critical patent/CN117138538A/en
Publication of CN117138538A publication Critical patent/CN117138538A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26Drying gases or vapours
    • B01D53/265Drying gases or vapours by refrigeration (condensation)
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B1/00Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/02Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001Recuperative heat exchangers
    • F28D21/0014Recuperative heat exchangers the heat being recuperated from waste air or from vapors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/80Water
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Gases (AREA)

Abstract

The invention discloses a high-temperature high-pressure gas dehumidifying device, which comprises a pre-cooling heat exchanger, a condensate heat exchanger, a vortex tube, a water vapor separator and an energy recoverer, wherein an outlet of a main air passage of the pre-cooling heat exchanger is divided into two pipelines, one pipeline of an outlet of the main air passage of the pre-cooling heat exchanger is connected with an inlet of the main air passage of the condensate heat exchanger, the other pipeline of the outlet of the main air passage of the pre-cooling heat exchanger is connected with an inlet of the vortex tube, and a cold end outlet of the vortex tube is connected with an inlet of a heat exchange air passage in the condensate heat exchanger; the outlet of the heat exchange air passage in the condensate heat exchanger is connected with the first heat exchange air passage in the energy recoverer, and the hot end outlet of the vortex tube is connected with the second heat exchange air passage in the energy recoverer. The mechanical movable part does not need to input extra power and only operates by means of a high-pressure air source.

Description

High-temperature high-pressure gas dehumidifying device
Technical Field
The invention relates to the field of air dehumidifying devices, in particular to a high-temperature high-pressure air dehumidifying device.
Background
At present, a plurality of special devices need to use a high-temperature high-pressure air source, and moisture in the high-temperature high-pressure air is generally dissociated in the high-temperature air in a gaseous form, and in the use process of the air source, the moisture is often converted into a liquid state due to the change of temperature and pressure, so that the device has faults or service life is reduced, and therefore, the moisture in the high-temperature high-pressure air needs to be removed urgently.
At present, air is pressurized or cooled through external equipment, and gaseous moisture is condensed into liquid and then removed through a water-vapor separation device. In so doing, there are mainly the following disadvantages:
(1) additional power is required to drive the external equipment to work.
(2) The external device is an electromechanical equipment system and is complex, so that the reliability of the whole equipment is reduced.
Disclosure of Invention
The invention provides a high-temperature high-pressure gas dehumidifying device, which aims to solve the problems that the dehumidifying device in the prior art needs extra power for driving and has low reliability.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a high temperature high pressure gas dehydrating unit, includes precooling heat exchanger (1), congeals water heat exchanger (3), vortex tube (4), water vapor separator (5), energy recuperation ware (6), wherein:
the pre-cooling heat exchanger (1) is provided with a main air passage, an inlet of the main air passage of the pre-cooling heat exchanger (1) is connected with an external high-temperature high-pressure high-humidity air source through a pipeline, and an outlet of the main air passage of the pre-cooling heat exchanger (1) is divided into two pipelines;
the condensation heat exchanger (3) is provided with a main air passage and a heat exchange air passage, and one pipeline of the outlet of the main air passage of the precooling heat exchanger (1) is connected with the inlet of the main air passage of the condensation heat exchanger (3);
the vortex tube (4) is used for dividing the introduced gas into low-temperature gas flow and high-temperature gas flow, the vortex tube (4) is provided with an inlet for introducing the gas, a cold end outlet for outputting the low-temperature gas flow and a hot end outlet for outputting the high-temperature gas flow, one pipeline of the main air passage outlet of the pre-cooling heat exchanger (1) is connected with the inlet of the vortex tube (4), and the cold end outlet of the vortex tube (4) is connected with the inlet of the heat exchange air passage in the condensate heat exchanger (3) through a pipeline;
the water-vapor separator (5) is used for separating water in the gas, the water-vapor separator (5) is provided with an inlet for introducing the gas, a liquid phase output port for outputting the water and a gas phase output port for outputting the gas, and the outlet of the main air passage of the condensate heat exchanger (3) is connected with the inlet of the water-vapor separator (5) through a pipeline;
the energy recoverer (6) is provided with a main air passage, a first heat exchange air passage and a second heat exchange air passage, a gas phase output port of the water-vapor separator (5) is connected with an inlet of the main air passage in the energy recoverer (6) through a pipeline, an outlet of the main air passage in the energy recoverer (6) outputs high-pressure dry air outwards, an outlet of the heat exchange air passage in the condensate heat exchanger (3) is connected with an inlet of the first heat exchange air passage in the energy recoverer (6) through a pipeline, and a hot end outlet of the vortex tube (4) is connected with an inlet of the second heat exchange air passage in the energy recoverer (6) through a pipeline.
Furthermore, the precooling heat exchanger (1) is provided with a heat exchange channel A, and a liquid phase output port of the water-vapor separator (5) is connected with an inlet of the heat exchange channel A in the precooling heat exchanger (1) through a pipeline.
Furthermore, the precooling heat exchanger (1) is provided with a heat exchange channel B, and an outlet of the first heat exchange air passage in the energy recoverer (6) is connected with an inlet of the heat exchange channel B in the precooling heat exchanger (1) through a pipeline.
Furthermore, the precooling heat exchanger (1) is provided with a heat exchange channel C, and an outlet of the second heat exchange air passage in the energy recoverer (6) is connected with an inlet of the heat exchange channel C in the precooling heat exchanger (1) through a pipeline.
In the invention, the high-temperature high-pressure high-humidity gas output by the high-temperature high-humidity gas source firstly enters the main air passage of the pre-cooling heat exchanger and is respectively output to the main air passage of the condensation heat exchanger and the vortex tube by the main air passage of the pre-cooling heat exchanger. The high-temperature high-pressure high-humidity gas in the vortex tube is divided into low-temperature gas flow and high-temperature gas flow, wherein the low-temperature gas flow is input into a heat exchange air passage of the condensate heat exchanger, water in the high-temperature high-pressure high-humidity gas entering a main air passage of the condensate heat exchanger is condensed through heat exchange of the low-temperature gas flow, and after the gas with condensed water output by the main air passage of the condensate heat exchanger enters a water-vapor separator for separation, the dry high-temperature high-pressure gas is output to a main air passage of the energy recoverer by the water-vapor separator.
Meanwhile, an outlet of the heat exchange air passage of the condensate heat exchanger is connected with the first heat exchange air passage of the energy recoverer, so that low-temperature air flow absorbs heat in the heat exchange air passage of the condensate heat exchanger to form high-temperature air, and the high-temperature air enters the first heat exchange air passage of the energy recoverer again and is used for further heating dry high-temperature and high-pressure air in the main air passage of the energy recoverer.
And similarly, the high-temperature air flow output by the vortex tube enters a second heat exchange air passage of the energy recoverer and is used for further heating the dry high-temperature high-pressure air in the main air passage of the energy recoverer.
The low-temperature water output by the water-vapor separator and the low-temperature gas with the heat output by the first heat exchange air passage and the second heat exchange air passage of the energy recoverer taken away are respectively sent into different heat exchange passages of the pre-cooling heat exchanger and are used for primarily cooling the high-temperature high-pressure high-humidity gas entering the main air passage of the pre-cooling heat exchanger.
Compared with the prior art, the invention has the advantages that:
1. the invention adopts the combination of precooling and condensate heat recovery technologies, and has no mechanical movable parts.
2. The invention adopts a novel condensation structure, expands the working condition range and improves the application range of the product.
3. The invention does not need to input extra power and only operates by means of the high-pressure air source.
3. The novel process is simple, the noise is low, and the novel process can be popularized to the field of dehumidifiers.
4. The technology of each component device is mature and easy to realize.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1, the embodiment discloses a high-temperature and high-pressure gas dehumidifying device, which comprises a precooling heat exchanger 1, a three-way pipe 2, a condensate heat exchanger 3, a vortex pipe 4, a water-vapor separator 5 and an energy recoverer 6.
The precooling heat exchanger 1 is provided with a main air passage 1.1, a heat exchange passage A1.2, a heat exchange passage B1.3 and a heat exchange passage C1.4, and the medium passing through the main air passage 1.1 can respectively form heat exchange with the medium passing through the heat exchange passage A1.2, the heat exchange passage B1.3 and the heat exchange passage C1.4. The inlet of the main air passage 1.1 in the precooling heat exchanger 1 is connected with an external high-temperature high-pressure high-humidity source through a pipeline so as to introduce high-temperature high-pressure high-humidity gas. The outlet of the main air passage 1.1 in the precooling heat exchanger 1 is connected with the first pipe orifice of the three-way pipe 2 through a pipeline.
The vortex tube 4 is provided with an inlet, a cold end outlet and a hot end outlet, the vortex tube 4 divides the gas introduced into the vortex tube 4 into low-temperature gas flow and high-temperature gas flow, wherein the low-temperature gas flow is output outwards through the cold end outlet of the vortex tube 4, and the high-temperature gas flow is output outwards through the hot end outlet of the vortex tube 4. The second pipe orifice of the three-way pipe 2 is connected with the inlet of the vortex pipe 4 through a pipeline.
The condensate heat exchanger 3 is provided with a main air passage 3.1 and a heat exchange air passage 3.2, and the medium passing through the main air passage 3.1 can form heat exchange with the medium passing through the heat exchange air passage 3.2. The third pipe orifice of the three-way pipe 2 is connected with the inlet of the main air passage 3.1 of the condensate heat exchanger 3 through a pipeline.
Therefore, the high-temperature high-pressure high-humidity gas output by the main air passage 1.1 in the pre-cooling heat exchanger 1 is divided into two paths by the three-way pipe 2, one path of gas enters the vortex tube 4 to form low-temperature gas flow and high-temperature gas flow, and the other path of gas enters the main air passage 3.1 of the condensate heat exchanger 3.
The cold end outlet of the vortex tube 4 is connected with the inlet of the heat exchange air passage 3.2 in the condensate heat exchanger 3 through a pipeline, so that low-temperature airflow flowing out of the cold end outlet of the vortex tube 4 enters the heat exchange air passage 3.2 in the condensate heat exchanger 3 and forms heat exchange with high-temperature high-pressure high-humidity gas in the main air passage 3.1 in the condensate heat exchanger 3, and moisture in the high-temperature high-pressure high-humidity gas in the main air passage 3.1 in the condensate heat exchanger 3 is condensed.
The water-vapor separator 5 is used for separating water in the gas introduced into the water-vapor separator 5, and the water-vapor separator 5 is provided with an inlet, a gas-phase output port and a liquid-phase output port. The outlet of the main air passage 3.1 in the condensate heat exchanger 3 is connected with the inlet of the water-vapor separator 5 through a pipeline, so that the gas with condensate output by the main air passage 3.1 in the condensate heat exchanger 3 enters the water-vapor separator 5, the water in the gas is separated, the separated water is output outwards through the liquid phase output port of the water-vapor separator 5, and the dry high-temperature high-pressure gas is output outwards through the gas phase output port of the water-vapor separator 5.
The energy recoverer 6 is provided with a main air passage 6.1, a first heat exchange air passage 6.2 and a second heat exchange air passage 6.3, and the medium passing through the main air passage 6.1 can respectively form heat exchange with the medium passing through the first heat exchange air passage 6.2 and the second heat exchange air passage 6.3. The gas phase output port of the water-gas separator 5 is connected with the inlet of the main air passage 6.1 in the energy recoverer 6 through a pipeline, and therefore, the dry high-temperature and high-pressure gas output by the water-gas separator 5 enters the main air passage 6.1 of the energy recoverer 6. The outlet of the heat exchange air passage 3.2 in the condensate heat exchanger 3 is connected with the inlet of the first heat exchange air passage 6.2 in the energy recoverer 6 through a pipeline, so that the low-temperature air flow output by the vortex tube 4 absorbs the heat of the high-temperature high-pressure high-humidity gas in the main air passage 3.1 of the condensate heat exchanger 3 to form high-temperature air flow, and the high-temperature air flow enters the first heat exchange air passage 6.2 in the energy recoverer 6 and further heats the high-temperature high-pressure gas dried in the main air passage 6.1 of the energy recoverer 6. The hot end outlet of the vortex tube 4 is connected with the inlet of the second heat exchange air passage 6.3 in the energy recoverer 6 through a pipeline, so that high-temperature air flow directly discharged by the vortex tube 4 enters the second heat exchange air passage 6.3 in the energy recoverer 6 and further heats the high-temperature and high-pressure air dried in the main air passage 6.1 of the energy recoverer 6. In this way, the high temperature and high pressure gas dried in the main gas duct 6.1 of the energy recoverer 6 can be further heated to maintain the temperature of the gas. The outlet of the main air passage 6.1 of the energy recoverer 6 is connected with the equipment which needs high-temperature high-pressure dry air outside through a pipeline, and the main air passage 6.1 of the energy recoverer 6 outputs dry high-temperature high-pressure gas outwards.
The outlet of the second heat exchange air passage 6.3 in the energy recoverer 6 is connected with the inlet of the heat exchange channel A1.2 in the pre-cooling heat exchanger 1 through a pipeline, the outlet of the first heat exchange air passage 6.2 in the energy recoverer 6 is connected with the inlet of the heat exchange channel B1.3 in the pre-cooling heat exchanger 1 through a pipeline, and the liquid phase output port of the water-vapor separator 5 is connected with the inlet of the heat exchange channel C1.4 in the pre-cooling heat exchanger 1 through a pipeline. The high-temperature air flows in the first heat exchange air passage 6.2 and the second heat exchange air passage 6.3 in the energy recoverer 6 lose heat and then become low-temperature air flows, the low-temperature air flows respectively enter corresponding heat exchange air passages in the pre-cooling heat exchanger 1, and meanwhile, low-temperature liquid output by the water-gas separator 5 enters corresponding heat exchange air passages in the pre-cooling heat exchanger 1, so that the water and the low-temperature air flows in the heat exchange air passages in the pre-cooling heat exchanger 1 carry out preliminary cooling on the high-temperature high-pressure high-humidity air entering the main air passage 1.1 of the pre-cooling heat exchanger 1. The outlets of the heat exchange channel A1.2, the heat exchange channel B1.3 and the heat exchange channel C1.4 in the precooling heat exchanger 1 are respectively communicated with the atmosphere.
In this embodiment, a part of high-temperature high-pressure air is utilized to obtain a low-temperature air flow through the vortex tube 4, then the low-temperature air is subjected to heat exchange with the high-temperature high-pressure high-humidity gas in the condensate heat exchanger 3, so that moisture in the high-temperature high-pressure high-humidity gas is condensed and then is separated out through the water-vapor separator 5 to be sent into the energy recoverer 6, and the high-temperature air flow output by the vortex tube 4 and the air flow with heat absorption capacity output by the heat exchange air passage of the condensate heat exchanger 3 are utilized in the energy recoverer 6 to heat the gas separated out of the water-vapor separator 5, so that the temperature of the gas can be kept, and finally, the dried high-temperature high-pressure gas is conveyed outwards by the energy recoverer 6.
In the pre-cooling heat exchanger 1, the air with lower temperature generated by the energy recoverer 6 and the liquid water with lower temperature generated by the water-vapor separator 5 can be used for carrying out the first cooling on the high-temperature high-pressure high-humidity gas entering the main air passage 1.1 of the pre-cooling heat exchanger 1, so that the temperature of the high-pressure air can be effectively reduced below the dew point temperature in the condensation heat exchanger 3.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, and the examples described herein are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. The individual technical features described in the above-described embodiments may be combined in any suitable manner without contradiction, and such combination should also be regarded as the disclosure of the present disclosure as long as it does not deviate from the idea of the present invention. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
The present invention is not limited to the specific details of the above embodiments, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the protection scope of the present invention without departing from the scope of the technical concept of the present invention, and the technical content of the present invention is fully described in the claims.

Claims (4)

1. The utility model provides a high temperature high pressure gas dehydrating unit which characterized in that, includes precooling heat exchanger (1), congeals water heat exchanger (3), vortex tube (4), water vapor separator (5), energy recuperation ware (6), wherein:
the pre-cooling heat exchanger (1) is provided with a main air passage, an inlet of the main air passage of the pre-cooling heat exchanger (1) is connected with an external high-temperature high-pressure high-humidity air source through a pipeline, and an outlet of the main air passage of the pre-cooling heat exchanger (1) is divided into two pipelines;
the condensation heat exchanger (3) is provided with a main air passage and a heat exchange air passage, and one pipeline of the outlet of the main air passage of the precooling heat exchanger (1) is connected with the inlet of the main air passage of the condensation heat exchanger (3);
the vortex tube (4) is used for dividing the introduced gas into low-temperature gas flow and high-temperature gas flow, the vortex tube (4) is provided with an inlet for introducing the gas, a cold end outlet for outputting the low-temperature gas flow and a hot end outlet for outputting the high-temperature gas flow, one pipeline of the main air passage outlet of the pre-cooling heat exchanger (1) is connected with the inlet of the vortex tube (4), and the cold end outlet of the vortex tube (4) is connected with the inlet of the heat exchange air passage in the condensate heat exchanger (3) through a pipeline;
the water-vapor separator (5) is used for separating water in the gas, the water-vapor separator (5) is provided with an inlet for introducing the gas, a liquid phase output port for outputting the water and a gas phase output port for outputting the gas, and the outlet of the main air passage of the condensate heat exchanger (3) is connected with the inlet of the water-vapor separator (5) through a pipeline;
the energy recoverer (6) is provided with a main air passage, a first heat exchange air passage and a second heat exchange air passage, a gas phase output port of the water-vapor separator (5) is connected with an inlet of the main air passage in the energy recoverer (6) through a pipeline, an outlet of the main air passage in the energy recoverer (6) outputs high-pressure dry air outwards, an outlet of the heat exchange air passage in the condensate heat exchanger (3) is connected with an inlet of the first heat exchange air passage in the energy recoverer (6) through a pipeline, and a hot end outlet of the vortex tube (4) is connected with an inlet of the second heat exchange air passage in the energy recoverer (6) through a pipeline.
2. The high-temperature high-pressure gas dehumidifying device according to claim 1, wherein the pre-cooling heat exchanger (1) is provided with a heat exchange channel A, and the liquid phase output port of the water-vapor separator (5) is connected with the inlet of the heat exchange channel A in the pre-cooling heat exchanger (1) through a pipeline.
3. The high-temperature and high-pressure gas dehumidifying device according to claim 1, wherein the pre-cooling heat exchanger (1) is provided with a heat exchange channel B, and an outlet of the first heat exchange air passage in the energy recoverer (6) is connected with an inlet of the heat exchange channel B in the pre-cooling heat exchanger (1) through a pipeline.
4. The high-temperature and high-pressure gas dehumidifying device according to claim 1, wherein the pre-cooling heat exchanger (1) is provided with a heat exchange channel C, and an outlet of the second heat exchange air channel in the energy recoverer (6) is connected with an inlet of the heat exchange channel C in the pre-cooling heat exchanger (1) through a pipeline.
CN202311320189.8A 2023-10-12 2023-10-12 High-temperature high-pressure gas dehumidifying device Pending CN117138538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311320189.8A CN117138538A (en) 2023-10-12 2023-10-12 High-temperature high-pressure gas dehumidifying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311320189.8A CN117138538A (en) 2023-10-12 2023-10-12 High-temperature high-pressure gas dehumidifying device

Publications (1)

Publication Number Publication Date
CN117138538A true CN117138538A (en) 2023-12-01

Family

ID=88900958

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311320189.8A Pending CN117138538A (en) 2023-10-12 2023-10-12 High-temperature high-pressure gas dehumidifying device

Country Status (1)

Country Link
CN (1) CN117138538A (en)

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