CN116850742A - CO based on solar energy coupling heat pump 2 Temperature swing adsorption system and method - Google Patents

CO based on solar energy coupling heat pump 2 Temperature swing adsorption system and method Download PDF

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Publication number
CN116850742A
CN116850742A CN202310715351.XA CN202310715351A CN116850742A CN 116850742 A CN116850742 A CN 116850742A CN 202310715351 A CN202310715351 A CN 202310715351A CN 116850742 A CN116850742 A CN 116850742A
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China
Prior art keywords
heat
module
solar
heat pump
water
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CN202310715351.XA
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Chinese (zh)
Inventor
杨凡
刁安娜
张斌
陈佳禾
周伟
赵程杰
张傲
迟志男
施逢委
张震
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711th Research Institute of CSIC
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711th Research Institute of CSIC
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Priority to CN202310715351.XA priority Critical patent/CN116850742A/en
Publication of CN116850742A publication Critical patent/CN116850742A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/02—Separation 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 adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation 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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0462—Temperature swing adsorption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G1/00—Steam superheating characterised by heating method
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00—Arrangements for storing heat collected by solar heat collectors
    • F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
    • B01D2259/40043—Purging
    • B01D2259/4005—Nature of purge gas
    • B01D2259/40052—Recycled product or process gas
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Abstract

The application discloses a CO based on a solar energy coupling heat pump 2 Temperature swing adsorption systems and methods. The temperature swing adsorption system comprises a trapping module, and comprises a plurality of adsorption towers which are arranged in parallel, wherein the adsorption towers are filled with amino modified adsorbent and are used for adsorbing CO in flue gas 2 The method comprises the steps of carrying out a first treatment on the surface of the The steam generation module is communicated with the adsorption tower and is used for generating overheatSteam to regenerate adsorbent and CO 2 Desorbing; the solar heat collection module is communicated with the steam generation module and is used for providing heat energy for generating superheated steam for the steam generation module through solar energy; the air source heat pump module is communicated with the steam generation module and is used for providing heat energy for generating superheated steam for the steam generation module through the hot air; the recovery module is respectively communicated with the adsorption tower and the air source heat pump module and is used for recovering CO 2 And condensed water and provides hot air to the air source heat pump module. The system and the method provided by the application have simple flow, and greatly reduce CO 2 Capturing energy consumption and can provide high purity CO 2 Product gas.

Description

CO based on solar energy coupling heat pump 2 Temperature swing adsorption system and method
Technical Field
The application relates to the technical field of carbon capture, in particular to a CO based on a solar coupling heat pump 2 Temperature swing adsorption systems and methods.
Background
CO 2 Is considered to be the main greenhouse gas responsible for global warming, and CO of coal-fired power plants 2 The emission amount accounts for 40% of the total emission amount, and the carbon capture is realized by CO 2 Important way of reducing emission, CO after combustion 2 Capturing CO in plant flue gas is the most popular way due to its low time and cost 2 Trapping is an important way to slow down the greenhouse effect. In conventional CO 2 In the trapping mode, the chemical absorption method is applied to CO after combustion 2 The primary methods of use of trapping, aqueous amine solutions (e.g., 20-30wt.% ethanolamine (MEA) and Diethanolamine (DEA)) and liquid ammonia are typical solutions for chemisorptionAnd (3) an agent. However, evaporation and degradation of the amine releases toxic contaminants and causes solvent loss, and moreover, at higher concentrations, MEA solutions are very corrosive to the equipment. In response to a series of problems in chemical absorption technology, adsorption technology, which refers to the CO extraction by weak van der waals forces (physical adsorption) or strong covalent bonding forces (chemical adsorption), has been the focus of attention 2 Molecules are selectively absorbed on the surface of another material, thereby realizing enrichment of CO 2 Is a method of (2). Such a material that selectively adsorbs a certain gas molecule is called an adsorbent. Adsorb CO 2 The adsorbent of (2) can be regenerated by different means according to the adsorption mechanism, and simultaneously release the adsorbed CO 2 And recycling is realized.
At present, a mature adsorbent regeneration technology utilizes steam extraction of a turbine of a power plant to heat a reboiler, so that the adsorbent is heated and regenerated. However, the regeneration temperature of the adsorbent is about 120 ℃, and the extraction temperature of the steam turbine can reach more than 200 ℃ and is not matched with the required regeneration temperature, so that serious energy waste is generated; in other existing processes, the adsorbent is regenerated by heating the adsorbent with high-temperature flue gas tail gas, but the process can lead to desorbed CO 2 And the gas is mixed with other gases in the tail gas of the flue gas, so that the separation difficulty is high and the recovery efficiency is low.
Therefore, a CO with simple flow, low energy consumption and high recycling efficiency is developed 2 Absorption system for CO in flue gas 2 Is of great significance to the trapping of (a).
Disclosure of Invention
The embodiment of the application provides a CO based on a solar energy coupling heat pump 2 Temperature swing adsorption system by setting CO 2 Subsystem such as trapping, steam generation and solar energy coupling heat pump, and the like, realizing CO 2 Is subjected to temperature swing adsorption; the embodiment of the application also provides a CO based on the solar energy coupling heat pump 2 The temperature swing adsorption method adopts the CO based on the solar energy coupling heat pump 2 The temperature swing adsorption system is used for adsorbing CO in power plant flue gas 2 Is used for providing heat to realize the system CO 2 Greatly reduces the energy consumption of capturing and can provide high-purity CO 2 Product gas.
The embodiment of the application provides a CO based on a solar energy coupling heat pump 2 Temperature swing adsorption system for capturing CO in flue gas 2 Comprising:
the trapping module comprises a plurality of adsorption towers which are arranged in parallel, and the adsorption towers are filled with an amino modified adsorbent and are used for adsorbing CO in flue gas 2 ；
A steam generation module communicated with the adsorption tower for generating superheated steam to regenerate the adsorbent and CO 2 Desorbing;
the solar heat collection module is communicated with the steam generation module and is used for providing heat energy for generating superheated steam for the steam generation module through solar energy;
the air source heat pump module is communicated with the steam generation module and is used for providing heat energy for generating superheated steam for the steam generation module through hot air;
the recovery module is respectively communicated with the adsorption tower and the air source heat pump module and is used for recovering CO 2 And condensed water and provides hot air to the air source heat pump module.
In some embodiments, the amine-modified adsorbent is an amine-modified mesoporous molecular sieve or an amine-modified silica.
In some embodiments, the bottom of the adsorption tower is provided with a first inlet and a second outlet, and the top of the adsorption tower is provided with a second inlet and a first outlet.
In some embodiments, the capture module further comprises a filter, an outlet of the filter being in communication with the first inlet of the adsorption column.
In some embodiments, the steam generation module comprises a heat exchange water tank, an evaporator, a first compressor, a condenser, a first expansion valve and a first gas-liquid separator, wherein the evaporator is filled with a first refrigerant, an inlet of the evaporator is communicated with an outlet of the heat exchange water tank, an outlet of the evaporator is sequentially communicated with the first compressor, the condenser and the first expansion valve, an inlet of the first gas-liquid separator is communicated with an outlet of the condenser, and an outlet of the first gas-liquid separator is communicated with a second inlet of the adsorption tower.
In some embodiments, the solar heat collection module comprises a solar heat collector, a first storage tank, a second storage tank and a first heat exchange coil, wherein the first storage tank and the second storage tank are arranged in parallel, one end of the first storage tank and one end of the second storage tank are communicated with the solar heat collector, the other end of the first storage tank and the second storage tank are communicated with the first heat exchange coil, and the first heat exchange coil is arranged in the heat exchange water tank.
In some embodiments, the solar collector, the first storage tank, and the second storage tank are filled with heat transfer oil.
In some embodiments, the air source heat pump module comprises a fan coil, a second compressor, a second expansion valve and a second heat exchange coil, wherein the fan coil is filled with a second refrigerant, an outlet of the fan coil is sequentially communicated with the second compressor, the second heat exchange coil and the second expansion valve, an outlet of the second expansion valve is communicated with an inlet of the fan coil, and the second heat exchange coil is arranged in the heat exchange water tank.
In some embodiments, the recovery module includes a heat exchanger and a second gas-liquid separator, an inlet of the heat exchanger is in communication with the adsorption column outlet, and an outlet of the heat exchanger is in communication with the second gas-liquid separator and an inlet of a fan coil, respectively.
In some embodiments, the CO 2 The temperature swing adsorption system further comprises:
a transfer pump for delivering the standing fluid to the components;
and the control valve is used for controlling the communication or blocking of the pipelines among the components.
Correspondingly, the embodiment of the application also provides a CO based on the solar energy coupling heat pump 2 The temperature swing adsorption method adopts any one of the CO based on the solar energy coupling heat pump 2 CO by temperature swing adsorption system 2 Adsorbing; the system comprises: the trapping module comprises a plurality of adsorption towers which are arranged in parallel and is used forAdsorption of CO in flue gas 2 The method comprises the steps of carrying out a first treatment on the surface of the A steam generation module for generating superheated steam to regenerate the adsorbent and CO 2 Desorbing; the solar heat collection module and the air source heat pump module are used for providing heat energy for generating superheated steam for the steam generation module; a recovery module for recovering CO 2 And condensed water and provides hot air for the air source heat pump module;
the CO 2 The temperature swing adsorption process comprises:
introducing flue gas into the adsorption tower, and adsorbing CO in the flue gas by using an amino modified adsorbent in the adsorption tower 2 And a small amount of water vapor, tail gas is discharged from the first outlet;
starting a solar heat collection module or an air source heat pump module, and heating water in a heat exchange water tank to a set temperature;
starting a steam generation module, conveying hot water in a heat exchange water tank to an evaporator, enabling a first refrigerant in the evaporator to absorb heat from the hot water, then evaporating the hot water into a first compressor, compressing the first refrigerant into a first compressed working medium, enabling the first compressed working medium to enter a condenser, introducing desalted water into the condenser, exchanging heat with the first compressed working medium, heating the desalted water into superheated steam, enabling the superheated steam to enter a first gas-liquid separator to obtain superheated steam and liquid water, enabling the superheated steam to enter a top inlet of an adsorption tower, and enabling the liquid water to return to the condenser for reheating;
The superheated steam is purged from the top of the adsorption tower to the bottom of the adsorption tower, so that the amino modified adsorbent is regenerated, and the adsorbed CO is released 2 And a small amount of water vapor is discharged from a second outlet at the bottom of the adsorption tower, enters a heat exchanger to exchange heat with the outside air, and then enters a second gas-liquid separator to obtain CO 2 Gas and condensed water, the CO 2 And the gas is transmitted to a subsequent working section, and the condensed water is transmitted to a desalted water pipe network for recycling.
In some embodiments, the temperature of the compressed steam and superheated steam is 110 to 130 ℃. For example, the temperatures of compressed steam and superheated steam (. Degree. C.) are: 110. 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, or any two. The superheated steam can realize the regeneration of the amino modified adsorbent in the temperature range, and meanwhile, the energy waste caused by overhigh temperature is avoided.
In some embodiments, the starting the solar heat collection module or the air source heat pump module, heating the water in the heat exchange water tank to a set temperature comprises:
if the effective sunlight time of the day is not less than 3 hours, the air source heat pump module can be kept off in the day, the solar heat collection module is started, and water in the heat exchange water tank is heated to the set temperature;
If the effective sunlight time of the day is less than 3 hours, the solar heat collection module is kept closed, the air source heat pump module is started, and the water in the heat exchange water tank is heated to the set temperature.
In some embodiments, the set temperature of the water in the heating heat exchange water tank is 60-80 ℃. For example, heating the water in the heat exchange water tank to a temperature (c): 60. 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, or a range of any or any two.
In some embodiments, the starting the solar collector module comprises:
starting a solar heat collector, and heating conduction oil in the solar heat collector to 80-160 ℃, for example, heating the conduction oil to the temperature (DEG C): 80. 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160 or a range of any two values, the heat conduction oil enters a first heat exchange coil in a heat exchange water tank through a first storage tank, and the heat conduction oil which exchanges heat with water in the heat exchange water tank enters a solar heat collector through a second storage tank for circulation.
In some embodiments, the starting air source heat pump module comprises:
And starting the fan coil, introducing hot air preheated by the heat exchanger into the fan coil, enabling a second refrigerant in the fan coil to absorb heat and evaporate and enter the compressor, compressing the second refrigerant into a second compressed working medium, and enabling the second compressed working medium to enter the heat exchange coil to exchange heat with water in the heat exchange water tank, wherein the refrigerant subjected to heat exchange returns to the fan coil through a second expansion valve to circulate.
In some embodiments, the first refrigerant may be refrigerant R245fa, the first refrigerant being compressed to a first compressed working fluid at a temperature of 120-140 ℃ and a pressure of 2.34MPa, e.g., a temperature (c): 120. 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, or any two.
In some embodiments, the second refrigerant may be refrigerant R22, the second refrigerant is compressed to a second compressed working fluid, the temperature is 80-90 ℃, the pressure is 3.65-4.5 MPa, for example, the temperature (c) is: 80. 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, or any combination of any two; the pressure (MPa) is in the range of any value or any two of 3.65, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5.
Compared with the prior art, the CO based on the solar coupling heat pump provided by the embodiment of the application 2 The temperature swing adsorption and method have the following beneficial effects:
(1) Existing temperature swing adsorption technology uses desorption of CO 2 The flue gas tail gas is used as a regeneration gas source of the adsorbent, and contains a large amount of nitrogen and a small amount of oxygen, argon and SO 2 NO and NO x Etc., after analysis with CO 2 Is difficult to separate, thus obtaining CO 2 The purity is very low and the adsorbent is difficult to recycle, and the application uses the superheated steam at 120 ℃ to regenerate the adsorbent so that the analyzed gas is CO 2 And water vapor, condensing the water vapor to obtain high-purity CO 2 The product gas has simple flow and is beneficial to carbon circulation.
(2) The steam consumed by the regeneration of the adsorbent comes from the steam generation module, the heat of the steam generation module comes from solar energy and a heat pump, the consumption of steam in a power plant is comprehensively replaced, the steam generation system can meet the operation requirements of daytime, nighttime and continuous overcast and rainy weather systems, the energy utilization rate is high, the temperature control is accurate, the energy waste is avoided, and the stable operation of the whole temperature swing adsorption system in different scenes can be ensured.
(3) The adsorbent used in the application is an amino modified adsorbent, when water exists, the adsorption performance of the traditional adsorbent can be greatly reduced, and even the adsorption performance of the traditional adsorbent is reduced to 0, and for the amino modified adsorbent, the water can promote CO 2 Therefore, the adsorbent is more suitable for the scene that the flue gas contains moisture in industrial production compared with the traditional adsorbent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a CO based on a solar energy coupled heat pump according to an embodiment of the present application 2 Schematic structural diagram of temperature swing adsorption system;
FIG. 2 is a schematic diagram of a trapping module according to an embodiment of the present application;
FIG. 3 is a schematic view of a steam generating module according to an embodiment of the present application;
fig. 4 is a schematic structural view of a solar heat collecting module according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a structure of an air source heat pump module according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a recycling module according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an adsorption tower according to an embodiment of the present application.
Reference numerals:
10-trapping module; 101-an adsorption tower; 102-a filter; a 20-steam generation module; 201-a heat exchange water tank; 202-an evaporator; 203-a first compressor; 204-a condenser; 205-a first expansion valve; 206-a first gas-liquid separator; 207-a first water pump; 208-a second water pump; 30-a solar heat collection module; 301-a solar collector; 302 a first reservoir; 303-a second tank; 304-a first heat exchange coil; 305-an oil pump; 40-air source heat pump module The method comprises the steps of carrying out a first treatment on the surface of the 401-fan coil; 402-a second compressor; 403-a second heat exchange coil; 404-a second expansion valve; 50-a recovery module; 501-a heat exchanger; 502-a second gas-liquid separator; 01-smoke; 02-ambient air; 03-desalted water; 04-smoke tail gas; 05-CO 2 The method comprises the steps of carrying out a first treatment on the surface of the 06-condensed water.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
The first embodiment of the application provides a CO based on a solar energy coupling heat pump 2 FIGS. 1-6 illustrate a CO based on a solar coupled heat pump according to an embodiment of the present application 2 As can be seen from fig. 1 to 6, the temperature swing adsorption system is schematically structured for CO according to the present embodiment 2 The temperature swing adsorption system includes a capture module 10, a steam generation module 20, a solar collector module 30, an air source heat pump module 40, and a recovery module 50.
Wherein the trapping module 10 comprises a plurality of adsorption towers 101 which are arranged in parallel, and the adsorption towers 101 are filled with amino modified adsorbent for adsorbing CO in the flue gas 2 ；
The steam generation module 20 is in communication with the adsorption tower 101 for generating superheated steam for adsorbent regeneration and CO 2 Desorbing;
the solar heat collecting module 30 is communicated with the steam generating module 20 and is used for providing heat energy for generating superheated steam for the steam generating module through solar energy;
the air source heat pump module 40 is communicated with the steam generation module 20 and is used for providing heat energy for generating superheated steam for the steam generation module through hot air;
the recovery module 50 is respectively communicated with the adsorption tower 101 and the air source heat pump module 40 for recovering CO 2 And condensed water, and provides hot air to the air source heat pump module 40.
The inlet flue gas 01 passes through the filter and then is introduced into the bottom of the adsorption tower 101, and after the flue gas is fully contacted with the adsorbent, CO in the flue gas 2 The residual clean flue gas tail gas 04 is discharged from a tower top pipeline after being trapped by the adsorbent; the adsorbent is regenerated after adsorption saturation, the superheated steam from the steam generation module passes through the adsorption tower from top to bottom, and the adsorbent releases the adsorbed CO 2 And water vapor, and condensing the outlet gas to obtain pure CO 2 Product gas 05.
Optionally, the amino modified adsorbent can be an amino modified mesoporous molecular sieve or amino modified silica, and aiming at the condition that the flue gas contains water, the water in the flue gas can not block the CO of the amino modified adsorbent 2 Can play a certain role in promotion.
Specifically, the bottom of the adsorption tower 101 is provided with a first inlet 1011 and a second outlet 1014, and the top of the adsorption tower 101 is provided with a second inlet 1012 and a first outlet 1013, as shown in fig. 7.
Specifically, the steam generating module includes a heat exchange water tank 201, an evaporator 202, a first compressor 203, a condenser 204, a first expansion valve 205 and a first gas-liquid separator 206, wherein the evaporator 202 is filled with a first refrigerant, an inlet of the evaporator 202 is communicated with an outlet of the heat exchange water tank 201, an outlet of the evaporator 202 is sequentially communicated with the first compressor 203, the condenser 204 and the first expansion valve 205, an inlet of the first gas-liquid separator 206 is communicated with an outlet of the condenser 204, and an outlet is communicated with an inlet at the top of the adsorption tower 101.
Specifically, the solar heat collection module comprises a solar heat collector 301, a first storage tank 302, a second storage tank 303 and a first heat exchange coil 304, and heat conduction oil is filled in the solar heat collector 301, the first storage tank 302 and the second storage tank 303; the first storage tank 302 and the second storage tank 303 are arranged in parallel, one end of the first storage tank 302 and one end of the second storage tank 303 are communicated with the solar heat collector 301, the other end of the first storage tank is communicated with the first heat exchange coil 304, and the first heat exchange coil 304 is arranged in the heat exchange water tank 201.
The solar heat collection module has the energy storage function besides heating the water in the heat exchange water tank 201, and the heat conduction oil in the first storage tank 302 can heat the heat exchange water tank at night. In addition, the heat conducting oil is used as a heat storage medium, so that the heat storage medium can be prevented from freezing in winter, and when the sunlight is sufficient in summer, the temperature can reach more than 100 ℃, vaporization can not be generated, and the running stability of the solar heat collection system is improved.
Specifically, the air source heat pump module includes a fan coil 401, a second compressor 402, a second expansion valve 404, and a second heat exchange coil 403, the fan coil 401 is filled with a first refrigerant, an outlet of the fan coil 401 is sequentially communicated with the second compressor 402, the second heat exchange coil 403, and the second expansion valve 404, an outlet of the second expansion valve 404 is communicated with an inlet of the fan coil 401, and the second heat exchange coil 403 is disposed in the heat exchange water tank 201.
Specifically, the recovery module includes a heat exchanger 501 and a gas-liquid separator 502, an inlet of the heat exchanger 501 is communicated with an outlet of the adsorption tower 101, and an outlet of the heat exchanger 501 is respectively communicated with an inlet of the second gas-liquid separator 502 and the fan coil 23.
In some embodiments, the capture module further comprises a filter 102, the outlet of the filter 102 is communicated with the bottom inlet of the adsorption tower 101, and the flue gas passes through the filter 102 and is filtered to remove solid particles, thereby helping to improve the adsorption of CO by the subsequent adsorbent 2 Is not limited to the above-described embodiments.
A second embodiment of the present application provides a CO based on a solar coupled heat pump 2 Temperature swing adsorption process employing a solar-coupled heat pump-based CO according to any of the first embodiments 2 The temperature swing adsorption system performs temperature swing adsorption. The temperature swing adsorption process comprises the steps of:
the flue gas 01 from the power plant is sent from the bottom of a group of adsorption towers 101 which are arranged in parallel after the dust removal of a filter 102, the adsorption towers are alternately and circularly operated by switching a plurality of groups of valves, and CO in the flue gas 2 And the residual flue gas after being adsorbed by the amino modified adsorbent is discharged from the top of the adsorption tower 101.
Under the condition of sufficient sunlight, namely when the effective sunlight time of the day is not less than 3 hours, starting a solar heat collection module, opening an oil pump 305 and a pipeline valve where the oil pump is positioned, so that heat conduction oil between the solar heat collector 301 and the first heat exchange coil 304 starts to circulate, and the heat conduction oil absorbs solar energy in the solar heat collector 301 to heat the heat conduction oil, and the heated heat conduction oil enters a first storage tank 302 to be stored for use at night; the heat conduction oil from the first storage tank 302 enters the first heat exchange coil 304 through the oil pump 305 to exchange heat with water in the heat exchange water tank 201, the temperature in the water tank after heat exchange can reach 60-80 ℃, and the heat conduction oil after water cooling returns to the solar heat collector 301 through the second storage tank 303 to be reheated.
At night, the solar heat collector 301 stops working, the valve is closed, heat transfer oil stored in the first storage tank 302 in daytime starts to exchange heat with the heat exchange water tank 201 through the oil pump 305, the storage capacity of the first storage tank 302 can meet the heat exchange requirement at night, and the cooled heat transfer oil returns to the second storage tank 303 to be stored for heating in daytime.
In continuous overcast and rainy weather, namely when the effective sunlight time of day is less than 3 hours, the heat of the solar heat collector 301 and the first storage tank 302 cannot meet the heat demand, when the temperature of the heat exchange water tank 201 cannot reach the set temperature of 60-80 ℃, the air source heat pump module is started, the external air 02 preheated by the heat exchanger 501 enters the fan coil 401, the second refrigerant in the fan coil 401 absorbs the heat of the external hot air and is evaporated, enters the second compressor 402 and is compressed into a second compressed working medium, and then the second compressed working medium is sent into the second heat exchange coil 403 to circularly exchange heat with the water in the heat exchange water tank 201 until the water temperature in the heat exchange water tank reaches the set temperature of 60-80 ℃. For example, heating the water in the heat exchange water tank to a temperature (c): 60. 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, or a range of any or any two.
The heat exchanged second refrigerant is returned to the fan coil 401 for circulation through the second expansion valve 404.
When the water in the heat exchange water tank 201 is heated to the specified temperature of 60-80 ℃, the high-temperature heat pump module is started, hot water in the heat exchange water tank 201 is pumped into the evaporator 202 of the high-temperature heat pump unit by the first water pump 207, the first refrigerant is evaporated after absorbing heat from the circulating water in the water tank in the evaporator 202, the evaporated first refrigerant enters the first compressor 203 to be compressed into a first compressed working medium, then enters the condenser 204 to exchange heat with desalted water 03 from the outside, the desalted water is heated into a superheated steam state, the steam is delivered to the adsorption tower 101 to regenerate the adsorbent after being subjected to gas-liquid separation in the first gas-liquid separator 206, and the liquid water in the first gas-liquid separator 206 is transported back to the condenser 204 to be heated.
After the adsorbent in the adsorption tower 101 is saturated, the adsorbent is desorbed by superheated steam from the steam generation module, and the superheated steam is purged from the top of the adsorption tower 101 to the bottom, so that the adsorbed CO 2 And water vapor are resolved, heat exchange is carried out between the heat exchanger 501 and the outside air, and gas-liquid separation is carried out in the gas-liquid separator 502 after the heat exchange, and CO 2 And the gas 05 is sent into a gas storage tank for subsequent compression working sections, and condensed water 06 returns to a desalted water pipe network for recycling.
In some embodiments, the first refrigerant may be refrigerant R245fa, the first refrigerant being compressed to a first compressed working fluid at a temperature of 120-140 ℃ and a pressure of 2.34MPa, e.g., a temperature (c) of: 120. 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, or any two.
In some embodiments, the second refrigerant may be refrigerant R22, the second refrigerant being compressed to a second compressed working fluid at a temperature of 80-90 ℃ and a pressure of 3.65-4.5 MPa, e.g., at a temperature (°c) of: 80. 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, or any combination of any two; the pressure (MPa) is in the range of any value or any two of 3.65, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5.
In some embodiments, the desalinated water is heated in condenser 204 to a superheated steam state of 110-130 ℃, e.g., the temperatures of compressed steam and superheated steam (c) are: 110. 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, or any two.
Embodiments of the application are further described below in conjunction with specific modes of operation.
Example 1:
the temperature of the flue gas of a certain power plant is 50 ℃, the pressure level is 0.12MPa, and the flow is 100000Nm 3 /hr, where CO 2 The content of (2) was 10%, the steam content was 2%, and the nitrogen content was 88%, under the condition of sufficient sunlight.
(1) The flue gas firstly enters the dust removal filter 102 to remove dust, then enters from the first inlet of one of the 2 parallel adsorption towers 101, and the CO in the flue gas 2 And a portion of the water vapor is absorbed by the amine-modified silica. At this time, the main component of the tail gas is nitrogen, which can be directly discharged.
(2) During daytime running, the solar heat collector is in a normal heating state, heat conduction oil reaches 120 ℃ after absorbing heat in the solar heat collector 301, the heat conduction oil is stored in the first storage tank 302, enters the first heat exchange coil 304 under the action of the oil pump 305 to be circularly exchanged with water in the heat exchange water tank 201, the cooled heat conduction oil returns to the second storage tank 303 to be stored, when the temperature of water in the water tank reaches 70 ℃, the evaporator 202 entering the steam generation module under the action of the first water pump 207 exchanges heat with refrigerant R245fa, the evaporated refrigerant R245fa is compressed by the first compressor 203 to become a high-temperature high-pressure working medium of 120 ℃ and 2.34MPa, desalted water supplied by the second water pump 208 is heated in the condenser 204 to become superheated water vapor of about 120 ℃, the superheated water vapor is sent into the adsorption tower 101 to be analyzed by the first gas-liquid separator 206, and the analyzed CO 2 And the water vapor enters a heat exchanger 501 along with the water vapor to be cooled to normal temperature, and then enters a second gas-liquid separator 502 to be subjected to gas-liquid separation, wherein the separated gas is pure CO 2 And sending out of the boundary region, and returning the condensed liquid to the desalted water main pipe.
(3) During night operation, the solar heat collector 301 stops working, the heat conduction oil stored in the first storage tank 302 starts to circulate, the circulation flow is the same as the step (2), and the storage amount of the heat conduction oil can meet the night analysis requirement of the adsorption tower.
(4) In continuous overcast and rainy weather, the solar heat collection system stops working, the air source heat pump system is started, the preheated air in the heat exchanger 501 is compressed by the second compressor 402 and then exchanges heat with the refrigerant R22 in the fan coil 401, the refrigerant R22 in the fan coil 401 absorbs heat and evaporates to enter the second compressor 402, the refrigerant is compressed into a high-temperature high-pressure working medium with the temperature of 80 ℃ and the pressure of 4.0MPa, the refrigerant is circularly exchanged with water in the heat exchange water tank 201 in the second heat exchange coil 403 until the water temperature in the water tank reaches 70 ℃, and the subsequent process is the same as the step (2).
(5) Collecting the pure CO separated in the step (2) 2 The detection purity of the gas is over 99 percent, and the system power consumption is 1250kW.
Example 2
The temperature of the flue gas of a certain power plant is 60 ℃, the pressure is 0.11MPa, and the flow is 120000Nm 3 /hr, where CO 2 The content of (2) was 10%, the steam content was 2%, and the nitrogen content was 88%.
(1) The flue gas firstly enters the dust removal filter 102 to remove dust, then enters from the first inlet of one of the 2 parallel adsorption towers 101, and the CO in the flue gas 2 And a portion of the water vapor is absorbed by the amine-modified silica. At this time, the main component of the tail gas is nitrogen, which can be directly discharged.
(2) During daytime running, the solar heat collector is in a normal heating state, heat conduction oil reaches 140 ℃ after absorbing heat in the solar heat collector 301, the heat conduction oil is stored in the first storage tank 302, enters the first heat exchange coil 304 under the action of the oil pump 305 to be circularly exchanged with water in the heat exchange water tank 201, the cooled heat conduction oil returns to the second storage tank 303 to be stored, when the temperature of water in the water tank reaches 80 ℃, the evaporator 202 entering the steam generation module under the action of the first water pump 207 exchanges heat with refrigerant R245fa, the evaporated refrigerant R245fa is compressed by the first compressor 203 to become a high-temperature high-pressure working medium of 130 ℃ and 3.0MPa, desalted water supplied by the second water pump 208 is heated in the condenser 204 to become superheated water vapor of about 130 ℃, the superheated water vapor is sent into the adsorption tower 101 to be analyzed by the first gas-liquid separator 206, and the analyzed CO 2 And the water vapor enters a heat exchanger 501 along with the water vapor to be cooled to normal temperature, and then enters a second gas-liquid separator 502 to be subjected to gas-liquid separation, wherein the separated gas is pure CO 2 Sending out the boundary region, condensing liquidReturning to the desalted water main pipe.
(3) During night operation, the solar heat collector 301 stops working, the heat conduction oil stored in the first storage tank 302 starts to circulate, the circulation flow is the same as the step (2), and the storage amount of the heat conduction oil can meet the night analysis requirement of the adsorption tower.
(4) In continuous overcast and rainy weather, the solar heat collection system stops working, the air source heat pump system is started, the preheated air in the heat exchanger 501 is compressed by the second compressor 402 and then exchanges heat with the refrigerant R22 in the fan coil 401, the refrigerant R22 in the fan coil 401 absorbs heat and evaporates to enter the second compressor 402, is compressed into a high-temperature high-pressure working medium with the temperature of 85 ℃ and the pressure of 4.5MPa, and exchanges heat with water in the heat exchange water tank 201 in the second heat exchange coil 403 in a circulating way until the water temperature in the water tank reaches 80 ℃, and the subsequent flow is the same as the step (2).
(5) Collecting the pure CO separated in the step (2) 2 The detection purity of the gas is over 99 percent, and the system power consumption is 1450kW.
Example 3
The temperature of the flue gas of a certain power plant is 60 ℃, the pressure is 0.11MPa, and the flow is 150000Nm 3 /hr, where CO 2 The content of (2) was 12%, the steam content was 3%, and the nitrogen content was 85%.
(1) The flue gas firstly enters the dust removal filter 102 to remove dust, then enters from the first inlet of one of the 2 parallel adsorption towers 101, and the CO in the flue gas 2 And a portion of the water vapor is absorbed by the amine-modified silica. At this time, the main component of the tail gas is nitrogen, which can be directly discharged.
(2) During daytime running, the solar heat collector is in a normal heating state, heat conduction oil reaches 80 ℃ after absorbing heat in the solar heat collector 301, the heat conduction oil is stored in the first storage tank 302, enters the first heat exchange coil 304 under the action of the oil pump 305 to be circularly exchanged with water in the heat exchange water tank 201, the cooled heat conduction oil returns to the second storage tank 303 to be stored, when the temperature of water in the water tank reaches 60 ℃, the evaporator 202 entering the steam generation module under the action of the first water pump 207 exchanges heat with refrigerant R245fa, and the evaporated refrigerant R245fa is compressed by the first compressor 203 to becomeThe high-temperature high-pressure working medium with the temperature of 120 ℃ and the pressure of 2.0MPa is obtained by heating desalted water supplied by a second water pump 208 into superheated steam with the temperature of about 110 ℃ in a condenser 204, and sending the superheated steam into an adsorption tower 101 for analysis through a first gas-liquid separator 206, and the analyzed CO 2 And the water vapor enters a heat exchanger 501 along with the water vapor to be cooled to normal temperature, and then enters a second gas-liquid separator 502 to be subjected to gas-liquid separation, wherein the separated gas is pure CO 2 And sending out of the boundary region, and returning the condensed liquid to the desalted water main pipe.
(3) During night operation, the solar heat collector 301 stops working, the heat conduction oil stored in the first storage tank 302 starts to circulate, the circulation flow is the same as the step (2), and the storage amount of the heat conduction oil can meet the night analysis requirement of the adsorption tower.
(4) In continuous overcast and rainy weather, the solar heat collection system stops working, the air source heat pump system is started, the preheated air in the heat exchanger 501 is compressed by the second compressor 402 and then exchanges heat with the refrigerant R22 in the fan coil 401, the refrigerant R22 in the fan coil 401 absorbs heat and evaporates to enter the second compressor 402, the refrigerant is compressed into a high-temperature high-pressure working medium with the temperature of 80 ℃ and the pressure of 3.65MPa, the refrigerant is circularly exchanged with water in the heat exchange water tank 201 in the second heat exchange coil 403 until the water temperature in the water tank reaches 60 ℃, and the subsequent process is the same as the step (2).
(5) Collecting the pure CO separated in the step (2) 2 The detection purity of the gas is more than 99%, and the system power consumption is 2050kW.
Example 4
The temperature of the flue gas of a certain power plant is 70 ℃, the pressure is 0.12MPa, and the flow is 180000Nm 3 /hr, where CO 2 The content of (2) was 10%, the steam content was 3%, and the nitrogen content was 87%.
(1) The flue gas firstly enters the dust removal filter 102 to remove dust, then enters from the first inlet of one of the 2 parallel adsorption towers 101, and the CO in the flue gas 2 And a portion of the water vapor is absorbed by the amine-modified silica. At this time, the main component of the tail gas is nitrogen, which can be directly discharged.
(2) During daytime running, the solar heat collector is in a normal heating state, and the heat conduction oil is in the solar heat collectorThe heat is absorbed in the heater 301 and then reaches 160 ℃, the heat is stored in the first storage tank 302, the heat is circularly exchanged with water in the heat exchange water tank 201 by entering the first heat exchange coil 304 under the action of the oil pump 305, the cooled heat conduction oil returns to the second storage tank 303 and is stored, when the temperature of the water in the water tank reaches 80 ℃, the heat is exchanged with the refrigerant R245fa by entering the evaporator 202 of the steam generation module under the action of the first water pump 207, the evaporated refrigerant R245fa becomes a high-temperature high-pressure working medium with the temperature of 140 ℃ and the pressure of 3.0MPa after being compressed by the first compressor 203, desalted water supplied by the second water pump 208 is heated into superheated water vapor with the temperature of about 130 ℃ in the condenser 204, the superheated water vapor is sent into the adsorption tower 101 for analysis by the first gas-liquid separator 206, and the analyzed CO is discharged 2 And the water vapor enters a heat exchanger 501 along with the water vapor to be cooled to normal temperature, and then enters a second gas-liquid separator 502 to be subjected to gas-liquid separation, wherein the separated gas is pure CO 2 And sending out of the boundary region, and returning the condensed liquid to the desalted water main pipe.
(3) During night operation, the solar heat collector 301 stops working, the heat conduction oil stored in the first storage tank 302 starts to circulate, the circulation flow is the same as the step (2), and the storage amount of the heat conduction oil can meet the night analysis requirement of the adsorption tower.
(4) In continuous overcast and rainy weather, the solar heat collection system stops working, the air source heat pump system is started, the preheated air in the heat exchanger 501 is compressed by the second compressor 402 and then exchanges heat with the refrigerant R22 in the fan coil 401, the refrigerant R22 in the fan coil 401 absorbs heat and evaporates to enter the second compressor 402, is compressed into a high-temperature high-pressure working medium with the temperature of 90 ℃ and the pressure of 4.5MPa, and exchanges heat with water in the heat exchange water tank 201 in the second heat exchange coil 403 in a circulating way until the water temperature in the water tank reaches 80 ℃, and the subsequent flow is the same as the step (2).
(5) Collecting the pure CO separated in the step (2) 2 The gas has the detection purity of more than 99 percent and the system power consumption of 2200kW.
Example 5
The temperature of the flue gas of a certain power plant is 75 ℃, the pressure level is 0.12MPa, and the flow is 200000Nm 3 /hr, where CO 2 The content of (2) was 12%, the steam content was 5%, and the nitrogen content was 83%.
(1) The flue gas firstly enters the dust removal filter 102 to remove dust, then enters from the first inlet of one of the 2 parallel adsorption towers 101, and the CO in the flue gas 2 And a portion of the water vapor is absorbed by the amine-modified silica. At this time, the main component of the tail gas is nitrogen, which can be directly discharged.
(2) During daytime running, the solar heat collector is in a normal heating state, heat conduction oil reaches 100 ℃ after absorbing heat in the solar heat collector 301, the heat conduction oil is stored in the first storage tank 302, enters the first heat exchange coil 304 under the action of the oil pump 305 to be circularly exchanged with water in the heat exchange water tank 201, the cooled heat conduction oil returns to the second storage tank 303 to be stored, when the temperature of water in the water tank reaches 75 ℃, the evaporator 202 entering the steam generation module under the action of the first water pump 207 exchanges heat with refrigerant R245fa, the evaporated refrigerant R245fa is compressed by the first compressor 203 to become a high-temperature high-pressure working medium with the temperature of 125 ℃ and the pressure of about 2.34MPa, desalted water supplied by the second water pump 208 is heated in the condenser 204 to become superheated steam with the temperature of about 125 ℃, and the superheated steam is sent into the adsorption tower 101 to be analyzed by the first gas-liquid separator 206, and the analyzed CO is sent out 2 And the water vapor enters a heat exchanger 501 along with the water vapor to be cooled to normal temperature, and then enters a second gas-liquid separator 502 to be subjected to gas-liquid separation, wherein the separated gas is pure CO 2 And sending out of the boundary region, and returning the condensed liquid to the desalted water main pipe.
(3) During night operation, the solar heat collector 301 stops working, the heat conduction oil stored in the first storage tank 302 starts to circulate, the circulation flow is the same as the step (2), and the storage amount of the heat conduction oil can meet the night analysis requirement of the adsorption tower.
(4) In continuous overcast and rainy weather, the solar heat collection system stops working, the air source heat pump system is started, the preheated air in the heat exchanger 501 is compressed by the second compressor 402 and then exchanges heat with the refrigerant R22 in the fan coil 401, the refrigerant R22 in the fan coil 401 absorbs heat and evaporates to enter the second compressor 402, is compressed into a high-temperature high-pressure working medium with the temperature of 85 ℃ and the pressure of 3.65MPa, and exchanges heat with water in the heat exchange water tank 201 in the second heat exchange coil 403 in a circulating way until the water temperature in the water tank reaches 75 ℃, and the subsequent process is the same as the step (2).
(5) Collecting the pure CO separated in the step (2) 2 The detection purity of the gas is over 99 percent, and the system power consumption is 2500kW.
It can be seen from examples 1 to 5 that the application provides a CO based on a solar energy coupling heat pump 2 The temperature swing adsorption system and the temperature swing adsorption method are suitable for a wider flue gas absorption scene, and can ensure the CO obtained by adsorption separation in a larger-scale capturing range 2 The purity of the gas is more than 99 percent; meanwhile, the system power consumption is greatly reduced, and the system is the existing CO 2 Trapping 1/5 of the system power consumption.
The embodiment of the application provides the CO based on the solar energy coupling heat pump 2 The temperature swing adsorption system and method are described in detail herein with specific examples for illustrating the principles and embodiments of the present application, the above examples being provided only to assist in understanding the technical solutions and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (17)

1. CO based on solar energy coupling heat pump 2 Temperature swing adsorption system for capturing CO in flue gas 2 Characterized by comprising:
the device comprises a trapping module (10), wherein the trapping module (10) comprises a plurality of adsorption towers (101) which are arranged in parallel, and the adsorption towers (101) are filled with an amino modified adsorbent and are used for adsorbing CO in flue gas 2 ；
A steam generation module (20), the steam generation module (20) is communicated with the adsorption tower (101) and is used for generating superheated steam to regenerate the adsorbent and CO 2 Desorbing;
a solar heat collection module (30), wherein the solar heat collection module (30) is communicated with the steam generation module (20) and is used for providing heat energy for generating superheated steam for the steam generation module (20) through solar energy;
an air source heat pump module (40), wherein the air source heat pump module (40) is communicated with the steam generation module (20) and is used for providing heat energy for generating superheated steam for the steam generation module (20) through hot air;
a recovery module (50), wherein the recovery module (50) is respectively communicated with the adsorption tower (101) and the air source heat pump module (40) and is used for recovering CO 2 And condensed water and provide hot air to the air source heat pump module (40).
2. CO based on solar energy coupled heat pump according to claim 1 2 The temperature swing adsorption system is characterized in that the amino modified adsorbent is an amino modified mesoporous molecular sieve or amino modified silica.
3. CO based on solar energy coupled heat pump according to claim 1 2 The temperature swing adsorption system is characterized in that a first inlet (1011) and a second outlet (1014) are formed in the bottom of the adsorption tower (101), and a second inlet (1012) and a first outlet (1013) are formed in the top of the adsorption tower (101).
4. A CO based on a solar energy coupled heat pump according to claim 3 2 Temperature swing adsorption system characterized in that the capture module (10) further comprises a filter (102), the outlet of the filter (102) being in communication with the first inlet (1011) of the adsorption column (101).
5. A CO based on a solar energy coupled heat pump according to claim 3 2 Temperature swing adsorption system, characterized in that the vapor generation module (20) comprises an evaporator (202); the evaporator (202) is filled with a first refrigerant, an inlet of the evaporator (202) is communicated with an outlet of the heat exchange water tank (201), and an outlet of the evaporator (202) is sequentially communicated with the first compressor (203), the condenser (204) and the first expansion valve (205); the outlet of the condenser (204) is communicated with the inlet of the first gas-liquid separator (206); the outlet of the first gas-liquid separator (206) is connected with the second adsorption tower (101)The inlet (1012) communicates.
6. A CO based on solar coupled heat pump according to claim 5 2 The temperature swing adsorption system is characterized in that the solar heat collection module (30) comprises a solar heat collector (301), the solar heat collector (301) is communicated with one ends of a first storage tank (302) and a second storage tank (303) which are arranged in parallel, the other ends of the first storage tank (302) and the second storage tank (303) are communicated with a first heat exchange coil (304), and the first heat exchange coil (304) is arranged in the heat exchange water tank (201).
7. A CO based on solar coupled heat pump according to claim 6 2 The temperature swing adsorption system is characterized in that the solar heat collector (301), the first storage tank (302) and the second storage tank (303) are filled with heat conduction oil.
8. A CO based on solar coupled heat pump according to claim 5 2 The temperature swing adsorption system is characterized in that the air source heat pump module (40) comprises a fan coil (401), a second refrigerant is filled in the fan coil (401), an outlet of the fan coil (401) is sequentially communicated with a second compressor (402), a second heat exchange coil (403) and a second expansion valve (404), and an outlet of the second expansion valve (404) is communicated with an inlet of the fan coil (401) to form a loop; the second heat exchange coil (403) is arranged in the heat exchange water tank (201).
9. A CO based on solar energy coupled heat pump according to claim 8 2 The temperature swing adsorption system is characterized in that the recovery module (50) comprises a heat exchanger (501) and a second gas-liquid separator (502), an inlet of the heat exchanger (501) is communicated with an outlet of the adsorption tower (101), and an outlet of the heat exchanger (501) is respectively communicated with an inlet of the second gas-liquid separator (502) and an inlet of a fan coil (401).
10. CO based on solar energy coupled heat pump according to claim 1 2 Temperature swing adsorptionThe system is characterized in that the CO 2 The temperature swing adsorption system further comprises:
a transfer pump for delivering the standing fluid to the components;
and the control valve is used for controlling the communication or blocking of the pipelines among the components.
11. CO based on solar energy coupling heat pump 2 Temperature swing adsorption process, characterized in that a CO based on a solar coupled heat pump according to any one of claims 1-10 is used 2 CO by temperature swing adsorption system 2 Adsorbing; the system comprises: the trapping module (10) comprises a plurality of adsorption towers (101) which are arranged in parallel and are used for adsorbing CO in the flue gas 2 The method comprises the steps of carrying out a first treatment on the surface of the A steam generation module (20) for generating superheated steam for regenerating the adsorbent and CO 2 Desorbing; a solar heat collection module (30) and an air source heat pump module (40) for providing thermal energy for generating superheated steam for the steam generation module (20); a recovery module (50) for recovering CO 2 And condensed water and provides hot air to the air source heat pump module (40);
the CO 2 The temperature swing adsorption process comprises:
introducing flue gas into an adsorption tower (101), and adsorbing CO in the flue gas by an amino modified adsorbent in the adsorption tower (101) 2 And steam, the tail gas is discharged from the first outlet (1013);
starting a solar heat collection module (30) or an air source heat pump module (40), and heating water in a heat exchange water tank (201) to a set temperature;
starting a steam generation module (20), conveying hot water in a heat exchange water tank (201) to an evaporator (202), enabling the first refrigerant to absorb heat from the hot water to evaporate, enabling the first refrigerant to enter a first compressor (203) to form a first compressed working medium, and enabling the first compressed working medium to enter a condenser (204); introducing desalted water into a condenser (204), performing heat exchange with the first compressed working medium, heating the desalted water into superheated steam, enabling the superheated steam to enter a first gas-liquid separator (206) to obtain superheated steam and liquid water, enabling the superheated steam to enter a top inlet of an adsorption tower (101), and enabling the liquid water to return to the condenser for reheating;
superheated steam is purged from the top of the adsorption tower (101) to the bottom of the adsorption tower, so that the amino modified adsorbent is regenerated, and adsorbed CO is released 2 And water vapor, which is discharged from the second outlet (1014), enters the heat exchanger (501) to exchange heat with the outside air and then enters the second gas-liquid separator (502) to obtain CO 2 And the condensed water is transmitted to a desalted water pipe network for recycling.
12. A CO based on solar coupled heat pump according to claim 11 2 The temperature swing adsorption method is characterized in that the temperature of the superheated steam is 110-130 ℃.
13. A CO based on solar coupled heat pump according to claim 11 2 The temperature swing adsorption method is characterized in that the starting the solar heat collection module (30) or the air source heat pump module (40), and heating the water in the heat exchange water tank (201) to a set temperature comprises the following steps:
if the effective sunlight time in the day is not less than 3 hours, the air source heat pump module (40) is kept closed, the solar heat collection module (30) is started, and water in the heat exchange water tank (201) is heated to a set temperature;
if the effective sunlight time of the day is less than 3 hours, the solar heat collection module (30) is kept closed, the air source heat pump module (30) is started, and the water in the heat exchange water tank (201) is heated to the set temperature.
14. A CO based on solar coupled heat pump according to claim 13 2 The temperature swing adsorption method is characterized in that the set temperature of water in the heating heat exchange water tank (201) is 60-80 ℃.
15. A CO based on solar coupled heat pump according to claim 13 2 A temperature swing adsorption process, wherein the starting solar thermal collection module (30) comprises:
starting the solar heat collector (101), heating conduction oil in the solar heat collector (101) to 80-160 ℃, enabling the conduction oil to enter a first heat exchange coil (304) in a heat exchange water tank (201) through a first storage tank (302), and enabling the conduction oil which completes heat exchange with water in the heat exchange water tank (201) to enter the solar heat collector (301) through a second storage tank (303) for circulation.
16. A CO based on solar coupled heat pump according to claim 13 2 A temperature swing adsorption method, characterized in that the start-up air source heat pump module (40) comprises:
and starting the fan coil (401), introducing hot air preheated by the heat exchanger (501) into the fan coil (401), enabling the second refrigerant to absorb heat and evaporate into the second compressor (402), compressing the second refrigerant into a second compressed working medium, enabling the second compressed working medium to enter the heat exchange coil (401) to exchange heat with water in the heat exchange water tank (201), and enabling the second compressed working medium to return to the fan coil (401) for circulation through the second expansion valve (404).
17. A CO based on a solar coupled heat pump according to claim 11 or 16 2 The temperature swing adsorption method is characterized in that the first refrigerant is refrigerant R245fa, the temperature of the first compressed working medium is 120-140 ℃, and the pressure is 2.0-3.0 MPa; and/or
The second refrigerant is refrigerant R22, the temperature of the second compressed working medium is 80-90 ℃, and the pressure is 3.65-4.5 MPa.
CN202310715351.XA 2023-06-15 2023-06-15 CO based on solar energy coupling heat pump 2 Temperature swing adsorption system and method Pending CN116850742A (en)

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