CN211025688U - Carbon dioxide capture system - Google Patents

Carbon dioxide capture system Download PDF

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Publication number
CN211025688U
CN211025688U CN201921301808.8U CN201921301808U CN211025688U CN 211025688 U CN211025688 U CN 211025688U CN 201921301808 U CN201921301808 U CN 201921301808U CN 211025688 U CN211025688 U CN 211025688U
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China
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shell
heat exchange
carbon dioxide
capture system
dioxide capture
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CN201921301808.8U
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胡小夫
汪洋
苏军划
王争荣
王凯亮
沈建永
李伟
王桦
张南极
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China Huadian Engineering Group Co Ltd
Huadian Environmental Protection Engineering and Technology Co Ltd
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China Huadian Engineering Group Co Ltd
Huadian Environmental Protection Engineering and Technology Co Ltd
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    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

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  • Treating Waste Gases (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The utility model provides a carbon dioxide entrapment system. The system is provided with a first shell and a second shell, wherein a first adsorbent layer is arranged in the first shell, a second adsorbent layer is arranged in the second shell, and more importantly, a heat-exchanging piece is also arranged. Through the arrangement, in the carbon dioxide trapping process, the first shell can be used for adsorption, the second shell can be used for desorption, or the first shell can be used for desorption, and the second shell can be used for adsorption, for example, when the first shell can be used for adsorption, and the second shell can be used for desorption, the first adsorbent layer in the first shell adsorbs carbon dioxide in flue gas, reaction heat released in the adsorption process and sensible heat in the flue gas are conducted to the second adsorbent layer in the second shell through the heat exchange piece, synchronous adsorption and desorption and full utilization of energy are realized, and the device has the advantages of low energy consumption, small occupied area, simplicity in operation and the like.

Description

Carbon dioxide capture system
Technical Field
The utility model belongs to the technical field of the carbon dioxide entrapment, concretely relates to carbon dioxide entrapment system.
Background
The medium-high temperature flue gas generated by the coal-fired power plant contains carbon dioxide which is a main source of greenhouse gases, so that the carbon dioxide in the flue gas is generally captured before the flue gas is discharged, and the content of the carbon dioxide is reduced.
At present, the common carbon dioxide separation methods mainly comprise an absorption method, a membrane separation method, a low-temperature distillation method, an adsorption method and the like, wherein the solid adsorption method is widely concerned as an environment-friendly carbon emission reduction process which does not corrode equipment and has low energy consumption. However, the traditional solid adsorption technology adopts an adsorption tower to adsorb carbon dioxide, and then desorbs the carbon dioxide through a desorption tower, and the technology has the defects of large floor area, large adsorption heat loss, complex operation, high energy consumption and the like.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in that there are area great, the absorption heat loss is big, the operation is complicated and the energy consumption shortcoming such as higher in current carbon dioxide entrapment system, and then provides a carbon dioxide entrapment system.
The carbon dioxide capture system provided by the utility model comprises a first shell and a second shell, wherein a first adsorbent layer is arranged in the first shell, a second adsorbent layer is arranged in the second shell,
also comprises the following steps of (1) preparing,
the heat exchange piece is arranged between the first shell and the second shell and provided with a first heat exchange surface and a second heat exchange surface which are oppositely arranged, the first heat exchange surface is in contact with an inner cavity of the first shell, and the second heat exchange surface is in contact with an inner cavity of the second shell.
Further, the first shell and the second shell are integrally formed into a total shell, and the heat exchange piece is arranged in the total shell so as to divide the total shell into the first shell and the second shell through the heat exchange piece.
Furthermore, the heat exchange piece is a heat exchange plate, one side of the heat exchange plate is a first heat exchange surface, and the other side of the heat exchange plate is a second heat exchange surface.
Further, the first heat exchange surface is a corrugated surface, and the second heat exchange surface is a corrugated surface.
Further, the air conditioner also comprises a first air inlet which is arranged at the air inlet end of the first shell; the first gas outlet is arranged at the gas outlet end of the first shell, and the first adsorbent layer is arranged in the shell between the gas inlet end and the gas outlet end of the first shell;
first CO2And the recycling port is arranged on the first shell and communicated with the inner cavity of the first shell.
Further, the first CO2The recycling port is arranged at the air outlet end of the first shell, and the first CO is2The recycling port is communicated with the first vacuumizing device.
Further, the air conditioner also comprises a second air inlet which is arranged at the air inlet ends of the two shells; the second air outlet is arranged at the air outlet end of the second shell, and the second adsorbent layer is arranged in the shell between the air inlet end and the air outlet end of the second shell;
second CO2And the recovery port is arranged on the second shell and communicated with the inner cavity of the second shell.
Further, the second CO2The recycling port is arranged at the air outlet end of the second shell, and the second CO is2The recycling port is communicated with the second vacuumizing device.
Further, the air inlet end of the first shell and the air inlet end of the second shell are arranged on the same side;
the air outlet end of the second shell and the air outlet end of the second shell are arranged on the same side.
Further, the first CO2The recovery port is close to the heat exchange member relative to the first air outlet, and the second CO is2The recovery port is close to the heat exchange member relative to the second air outlet,
the first shell and the second shell are both cylindrical shells.
The utility model discloses technical scheme has following advantage: through setting up first casing and second casing, set up first adsorbent layer in the first casing, set up the second adsorbent layer in the second casing, more importantly, still establish the replacement heat spare, this heat exchange spare set up in first casing with between the second casing, the heat exchange spare has relative first heat-transfer face and the second heat-transfer face that sets up, first heat-transfer face with the inner chamber contact of first casing, the second heat-transfer face with the inner chamber contact of second casing. Through the arrangement, in the carbon dioxide trapping process, the first shell can be used for adsorption, the second shell can be used for desorption, or the first shell can be used for desorption, and the second shell can be used for adsorption, for example, when the first shell can be used for adsorption, and the second shell can be used for desorption, the first adsorbent layer in the first shell adsorbs carbon dioxide in flue gas, reaction heat released in the adsorption process and sensible heat in the flue gas are conducted to the second adsorbent layer in the second shell through the heat exchange piece, synchronous adsorption and desorption and full utilization of energy are realized, and the device has the advantages of low energy consumption, small occupied area, simplicity in operation and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a carbon dioxide capture system according to the present invention;
FIG. 2 is a schematic view of another embodiment of the carbon dioxide capture system of the present invention;
reference numerals:
1-a first housing; 1 a-a first inlet port; 1 b-a first outlet port; 1 c-first CO2A recovery port; 2-a second housing; 2 a-a second inlet port; 2 b-a second outlet; 2 c-second CO2A recovery port; 3-heat exchange member; 4-a vacuum-pumping device; 5-CO2And (4) a collecting device.
Detailed Description
The technical solution of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 and 2, the carbon dioxide capturing system provided by the present invention comprises a first shell 1 and a second shell 2, wherein a first adsorbent layer is disposed in the first shell 1, and a second adsorbent layer is disposed in the second shell 2, specifically, the adsorbents in the first adsorbent layer and the second adsorbent layer can be an amine-supported mesoporous molecular sieve material, an amine-supported alumina material (for example, gamma-alumina is used as a carrier to support Polyethyleneimine (PEI), and the loading of PEI is 30%), an amine-supported metal-organic framework material, in an alternative embodiment, the first shell 1 and the second shell 2 are both cylindrical shells, specifically, as shown in fig. 1, a cubic shell, as a variable embodiment, as shown in fig. 2, a semi-cylindrical shell, and further comprising,
the heat exchange piece 3 is arranged between the first shell 1 and the second shell 2, the heat exchange piece 3 is provided with a first heat exchange surface and a second heat exchange surface which are oppositely arranged, the first heat exchange surface is in contact with an inner cavity of the first shell 1, and the second heat exchange surface is in contact with an inner cavity of the second shell 2.
In the carbon dioxide trapping system, by arranging the first casing 1 and the second casing 2, a first adsorbent layer is arranged in the first casing 1, a second adsorbent layer is arranged in the second casing 2, more importantly, a heat exchange member 3 is further arranged, the heat exchange member 3 is arranged between the first casing 1 and the second casing 2, the heat exchange member 3 is provided with a first heat exchange surface and a second heat exchange surface which are oppositely arranged, the first heat exchange surface is in contact with the inner cavity of the first casing 1, and the second heat exchange surface is in contact with the inner cavity of the second casing 2. Through the arrangement, in the carbon dioxide trapping process, the first shell 1 can be used for adsorption, the second shell 2 can be used for desorption, or the first shell 1 can be used for desorption, and the second shell 2 can be used for adsorption, for example, when the first shell 1 can be used for adsorption, and the second shell 2 can be used for desorption, the first adsorbent layer in the first shell 1 adsorbs carbon dioxide in flue gas, and reaction heat released in the adsorption process and sensible heat in the flue gas are conducted to the second adsorbent layer in the second shell 2 through the heat exchange piece, so that synchronous adsorption and desorption are realized, and the full utilization of energy is realized.
As shown in fig. 2, the first casing 1 and the second casing 2 are integrally formed into a total casing, and the heat exchange member 3 is disposed in the total casing to divide the total casing into the first casing and the second casing through the heat exchange member 3; by the arrangement, when the carbon dioxide capture system is prepared, the carbon dioxide capture system is simple to manufacture and convenient to operate, and the occupied area can be greatly saved; specifically, heat exchanger 3 is the heat transfer board, and one side of heat transfer board is first heat transfer face, and the opposite side is the second heat transfer face, utilizes the heat transfer board to keep apart the inner space of total casing, and is convenient simple, and the material that coefficient of heat conductivity is high can be selected to the material of heat transfer board, can select metal material such as copper, aluminium for example. More preferably, the first heat exchange surface is a corrugated surface, and the second heat exchange surface is a corrugated surface, so that the heat exchange area of the heat exchange part is larger, the heat is transferred more quickly and sufficiently, and the time required for desorption is shortened.
Further, the air conditioner also comprises a first air inlet 1a which is arranged at the air inlet end of the first shell 1; the first gas outlet 1b is arranged at the gas outlet end of the first shell 1, and the first adsorbent layer is arranged in the shell between the gas inlet end and the gas outlet end of the first shell 1; first CO2And the recovery port 1c is arranged on the first shell 1 and is communicated with the inner cavity of the first shell 1.
As an alternative embodiment, the first CO2A recycling port 1c is provided at the outlet end of the first casing 1, the first CO2The recovery port 1c is communicated with a first vacuumizing device; for collecting desorbed CO2The first vacuum extractor is also connected with CO2The collecting device 5 is communicated;
further, the air conditioner also comprises a second air inlet 2a which is arranged at the air inlet end of the two shells 2; the second air outlet 2b is arranged at the air outlet end of the second shell 2, and the second adsorbent layer is arranged in the shell between the air inlet end and the air outlet end of the second shell 2; second CO2And the recovery port 2c is arranged on the second shell 2 and is communicated with the inner cavity of the second shell 2.
As an alternative embodiment, the second CO2A recycling port 2c is provided at the outlet end of the second casing 2, the second CO2The recovery port 2c is communicated with a second vacuumizing device; is composed ofCollecting and desorbing CO2The second vacuum extractor is also connected with CO2The collecting device 5 is communicated; specifically, the first vacuumizing device and the second vacuumizing device are the same device and are both vacuumizing devices 4;
as an alternative embodiment, the air inlet end of the first shell 1 is arranged on the same side as the air inlet end of the second shell 2; the air outlet end of the second shell 2 and the air outlet end of the second shell 2 are arranged on the same side. Therefore, the synchronous proceeding of the adsorption process and the desorption process can be better ensured, and the heat from the adsorption process can be timely transferred to the desorption process.
As an alternative embodiment, as shown in FIG. 1, the first CO2A recovery port 1c is provided near the heat exchanging element 3 with respect to the first gas outlet 1b, and the second CO is supplied2The recovery port 2c is close to the heat exchange member 3 relative to the second air outlet 2b, and thus the heat quantity close to the heat exchange member 3 is higher, so that the desorbed carbon dioxide can be more quickly extracted, and the desorption speed is increased. Specifically, desorption and desorption can be performed on the adsorbent saturated in adsorption by heating, vacuumizing and the like.
The working principle of the carbon dioxide capture system is as follows: as shown in fig. 1:
(1) the first shell 1 is used as an adsorption tower for absorbing CO in the flue gas2Rich in CO2From the first inlet 1a and out of the first outlet 1b, the first CO2The recovery port 1c is closed; at this time, the second shell 2 is used as a desorption tower, the reaction heat released in the adsorption process of the first shell 1 and the sensible heat in the flue gas are transferred to the second shell 2 through the heat exchange piece 3 (specifically, the inner pipe wall), the second air inlet 2a and the second air outlet 2b are closed, and the second CO is pumped in a vacuum mode2CO which is saturated by adsorption in the second shell 2 is removed from the recovery port 2c2When the first shell 1 is saturated in adsorption, the second shell 2 also reaches desorption balance, and at the moment, the first shell 1 and the second shell 2 are exchanged;
(2) the desorbed second shell 2 is used as an adsorption tower for absorbing CO in the flue gas2The flue gas enters from the second gas inlet 2a and exits from the second gas outlet 2b, the second CO2The recovery port 2c is closed; at this time, the first shell 1 is used as a desorption tower for removing adsorbed and saturated CO by vacuumizing2The first inlet port 1a and the first outlet port 1b are closed, and the first CO is introduced2CO desorbed from the recovery port 1c2。
The more specific operating principle of the carbon dioxide capture system is as follows:
(1) respectively filling solid carbon dioxide adsorbents into a first shell and a second shell in a carbon dioxide capture system, wherein the solid carbon dioxide adsorbents adopt gamma-alumina as a carrier to load Polyethyleneimine (PEI), the loading amount of the PEI is 30%, and the filling amounts of the first shell and the second shell are respectively 200 g;
(2) simulating the flue gas of a power plant, wherein the temperature of the flue gas of the power plant is 80 ℃, and CO in the flue gas2The volume content is 15%, the simulated flue gas passes through the carbon dioxide capture system at the speed of 40m L/min, and the CO in the flue gas after passing through the adsorbent is detected by using a gas chromatograph2To determine the adsorption performance of the adsorbent;
(3) in the carbon dioxide capturing system, the first gas inlet, the first gas outlet and the second CO are opened2Recycling port, closing first CO2The first shell is taken as an adsorption tower for absorbing CO in the flue gas at the recycling port, the second air inlet and the second air outlet2Rich in CO2The flue gas enters from the first gas inlet and is discharged from the first gas outlet; the second shell is used as a desorption tower, the reaction heat released in the adsorption process of the first shell and the sensible heat in the flue gas are used for heating the second shell, and the adsorbed and saturated CO is removed in a vacuumizing mode2Second CO2CO desorbed from the recovery port2Detecting CO from the tail gas of the flue gas2When the content exceeds 5%, the adsorption-desorption process is finished;
(4) opening the first CO2The recycling port, the second air inlet and the second air outlet are closed, and the first air inlet, the first air outlet and the second CO are closed2A recycling port which takes the desorbed second shell as an adsorption tower for absorbing CO in the flue gas2At the moment, the first shell is used as a desorption tower for heating and removing adsorbed and saturated CO2The adsorption amount of the adsorbent regenerated in multiple cycles was measured, and the corresponding measurement results are shown in table 1 below:
TABLE 1 saturated adsorption capacity (mg/g) of adsorbent after several regenerations
For the first time For the second time The third time Fourth time Fifth time The sixth time
First shell 128 115 109 105 98 95
Second shell 126 117 106 102 102 97
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. A carbon dioxide capture system comprises a first shell and a second shell, wherein a first adsorbent layer is arranged in the first shell, a second adsorbent layer is arranged in the second shell,
it is characterized by also comprising the following steps of,
the heat exchange piece is arranged between the first shell and the second shell and provided with a first heat exchange surface and a second heat exchange surface which are oppositely arranged, the first heat exchange surface is in contact with an inner cavity of the first shell, and the second heat exchange surface is in contact with an inner cavity of the second shell.
2. The carbon dioxide capture system of claim 1, wherein the first housing is integrally formed with a second housing as a unitary housing, the heat exchanger being disposed within the unitary housing to divide the unitary housing into the first housing and the second housing by the heat exchanger.
3. The carbon dioxide capture system of claim 1 or 2, wherein the heat exchange member is a heat exchange plate having a first heat exchange surface on one side and a second heat exchange surface on the other side.
4. The carbon dioxide capture system of claim 3, wherein the first heat exchange surface is a corrugated surface and the second heat exchange surface is a corrugated surface.
5. The carbon dioxide capture system of claim 1, further comprising a first air inlet disposed at an air inlet end of the first housing; the first gas outlet is arranged at the gas outlet end of the first shell, and the first adsorbent layer is arranged in the shell between the gas inlet end and the gas outlet end of the first shell;
first CO2And the recycling port is arranged on the first shell and communicated with the inner cavity of the first shell.
6. The carbon dioxide capture system of claim 5, wherein the first CO is2The recycling port is arranged at the air outlet end of the first shell, and the first CO is2The recycling port is communicated with the first vacuumizing device.
7. The carbon dioxide capture system of claim 6, further comprising a second air inlet disposed at an air inlet end of the two housings; the second air outlet is arranged at the air outlet end of the second shell, and the second adsorbent layer is arranged in the shell between the air inlet end and the air outlet end of the second shell;
second CO2And the recovery port is arranged on the second shell and communicated with the inner cavity of the second shell.
8. The carbon dioxide capture system of claim 7, wherein the secondary CO is2The recycling port is arranged at the air outlet end of the second shell, and the second CO is2The recycling port is communicated with the second vacuumizing device.
9. The carbon dioxide capture system of claim 1 or 2, wherein the air inlet end of the first housing is disposed on the same side as the air inlet end of the second housing;
the air outlet end of the second shell and the air outlet end of the second shell are arranged on the same side.
10. The carbon dioxide capture system of claim 7, wherein the first CO is2The recovery port is close to the heat exchange member relative to the first air outlet, and the second CO is2The recovery port is close to the heat exchange member relative to the second air outlet,
the first shell and the second shell are both cylindrical shells.
CN201921301808.8U 2019-08-12 2019-08-12 Carbon dioxide capture system Active CN211025688U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110496493A (en) * 2019-08-12 2019-11-26 中国华电科工集团有限公司 A kind of carbon dioxide capture system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110496493A (en) * 2019-08-12 2019-11-26 中国华电科工集团有限公司 A kind of carbon dioxide capture system

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