CN216498544U - Flue gas waste heat cascade utilization device with carbon dioxide capture function - Google Patents
Flue gas waste heat cascade utilization device with carbon dioxide capture function Download PDFInfo
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Abstract
The utility model belongs to the field of carbon dioxide capture, and particularly relates to a flue gas waste heat gradient utilization device with carbon dioxide capture. The utility model utilizes the characteristic that the absorption capacity of the ionic liquid to CO2 is reduced along with the increase of the temperature, absorbs CO2 at low temperature, releases CO2 at high temperature, and recycles the heat of the high-temperature CO 2-rich ionic liquid and the heat in the flue gas. Meanwhile, the flue gas is subjected to heat exchange and temperature reduction through the first heat exchanger and the fourth heat exchanger, so that the temperature of the flue gas entering the absorption tower is controlled, and the absorption capacity of CO2 is increased; the heat supply network backwater is subjected to heat exchange and temperature rise through the third heat exchanger, the second heat exchanger and the first heat exchanger in sequence, the heat utilization efficiency of the system is high, the heat supply network water can finally reach 100-130 ℃, and the heat supply network water value at the temperature is high.
Description
Technical Field
The utility model belongs to the field of flue gas recovery, and particularly relates to a flue gas waste heat gradient utilization device with carbon dioxide capture.
Background
As a key industry for carbon dioxide emission, the flue gas tail gas of each thermal power plant in the power industry contains a large amount of carbon dioxide, and is directly discharged to the atmosphere in the current process flow. With the establishment of the national carbon emission right trading market, the carbon emission is comprehensively and directly related to the economic benefit of enterprises, and the demand of capturing carbon dioxide gradually appears.
For a cogeneration unit, recovering the waste heat in the system is one of the best ways to increase the heating capacity without upsizing the unit. At present, the flue gas is generally discharged after being cooled to 50-60 ℃ by adopting a water spraying method in a power plant, and the heat in the flue gas is not recovered, so that the energy waste is caused.
In the prior art, the utilization of the waste heat of the flue gas is rough, the water temperature of a heat supply network is low, and the utilization value is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model provides a gradient utilization device for flue gas waste heat with carbon dioxide capture, which aims to solve the problems that in the prior art, the utilization of flue gas waste heat is rough and the temperature of heat supply network water is low.
In order to solve the problems in the prior art, the utility model provides the following scheme:
a gradient utilization device for flue gas waste heat with carbon dioxide capture comprises a first heat exchanger, a second heat exchanger, an absorption tower, a desorption tower, a third heat exchanger and a fourth heat exchanger;
the first heat exchanger is provided with a first heat exchanger flue gas heat exchange channel inlet, a first heat exchanger flue gas heat exchange channel outlet and a first heat exchanger hot water heat exchange channel inlet; the inlet of the first heat exchanger flue gas heat exchange channel is connected with the outlet of the first heat exchanger flue gas heat exchange channel;
the second heat exchanger is provided with a second heat exchanger ionic liquid heat exchange channel inlet and a second heat exchanger ionic liquid heat exchange channel outlet; an inlet of the ionic liquid heat exchange channel of the second heat exchanger is connected with an outlet of the ionic liquid heat exchange channel of the second heat exchanger;
the third heat exchanger is provided with a carbon dioxide heat exchange channel inlet of the third heat exchanger, a hot water heat exchange channel inlet of the third heat exchanger and a hot water heat exchange channel outlet of the third heat exchanger; the inlet of the hot water heat exchange channel of the third heat exchanger is connected with the outlet of the hot water heat exchange channel of the third heat exchanger;
the fourth heat exchanger is provided with a fourth heat exchanger ionic liquid heat exchange channel inlet, a fourth heat exchanger ionic liquid heat exchange channel outlet, a fourth heat exchanger hot water heat exchange channel inlet and a fourth heat exchanger hot water heat exchange channel outlet; an inlet of the ionic liquid heat exchange channel of the fourth heat exchanger is connected with an outlet of the ionic liquid heat exchange channel of the fourth heat exchanger, and an inlet of the hot water heat exchange channel of the fourth heat exchanger is connected with an outlet of the hot water heat exchange channel of the fourth heat exchanger;
the absorption tower is provided with an absorption tower flue gas inlet, an absorption tower ionic liquid inlet and an absorption tower ionic liquid outlet;
the desorption tower is provided with a desorption tower ionic liquid inlet, a desorption tower ionic liquid outlet and a desorption tower carbon dioxide outlet;
the inlet of the first heat exchanger flue gas heat exchange channel is connected with a flue gas inlet 0; the outlet of the first heat exchanger flue gas heat exchange channel is connected with the flue gas inlet of the absorption tower;
an inlet of the ionic liquid heat exchange channel of the second heat exchanger is connected with an ionic liquid outlet of the absorption tower, and an outlet of the ionic liquid heat exchange channel of the second heat exchanger is connected with an ionic liquid inlet of the desorption tower;
the inlet of the hot water heat exchange channel of the third heat exchanger is connected with a heat supply network water input pipe; an outlet of a hot water heat exchange channel of the third heat exchanger is connected with an inlet of a hot water heat exchange channel of the fourth heat exchanger, an outlet of the hot water heat exchange channel of the fourth heat exchanger is connected with an inlet of a hot water heat exchange channel of the first heat exchanger, and an outlet of the hot water heat exchange channel of the first heat exchanger is connected with a heat supply network water output pipe;
the outlet of the ion liquid heat exchange channel of the fourth heat exchanger is connected with the inlet of the ion liquid heat exchange channel of the absorption tower;
and a carbon dioxide outlet of the desorption tower is connected with an inlet of a carbon dioxide heat exchange channel of the third heat exchanger.
Preferably, the second heat exchanger is also provided with a second heat exchanger flue gas heat exchange channel inlet and a second heat exchanger flue gas heat exchange channel outlet, and the second heat exchanger flue gas heat exchange channel inlet is connected with the second heat exchanger flue gas heat exchange channel outlet;
the outlet of the first heat exchanger flue gas heat exchange channel is connected with the flue gas inlet of the absorption tower through the inlet of the second heat exchanger flue gas heat exchange channel and the outlet of the second heat exchanger flue gas heat exchange channel;
the inlet of the second heat exchanger flue gas heat exchange channel is connected with the outlet of the first heat exchanger flue gas heat exchange channel, and the outlet of the second heat exchanger flue gas heat exchange channel is connected with the flue gas inlet of the absorption tower.
Preferably, the flue gas inlet 0 is connected with the inlet of the flue gas heat exchange channel of the second heat exchanger, and the outlet of the flue gas heat exchange channel of the second heat exchanger is connected with the pipeline between the outlet of the flue gas heat exchange channel of the first heat exchanger and the flue gas inlet of the absorption tower.
Preferably, a first heat exchanger hot water heat exchange channel outlet is arranged on the first heat exchanger, the first heat exchanger hot water heat exchange channel outlet is connected with a first heat exchanger hot water heat exchange channel inlet, and the first heat exchanger hot water heat exchange channel outlet is connected with the heat supply network.
Preferably, the absorption tower is provided with an absorption tower flue gas outlet.
Preferably, the flue gas outlet of the absorption tower is arranged at the top of the absorption tower and is connected with a chimney.
Preferably, the ionic liquid outlet of the absorption tower is arranged at the bottom of the absorption tower; the ionic liquid outlet of the desorption tower is arranged at the bottom of the desorption tower; the carbon dioxide outlet of the desorption tower is arranged at the top of the desorption tower.
Preferably, the third heat exchanger is provided with a carbon dioxide heat exchange channel outlet of the third heat exchanger; and the outlet of the carbon dioxide heat exchange channel of the third heat exchanger is communicated with a carbon dioxide storage tank.
Preferably, the temperature of the heat supply network water after heat exchange and temperature rise through the first heat exchanger is higher than 100 ℃ and lower than 130 ℃.
The utility model has the advantages that:
the characteristics that the ionic liquid absorbs carbon dioxide at low temperature and releases carbon dioxide at high temperature are utilized, the heat of the high-temperature carbon dioxide-rich ionic liquid and the heat in the flue gas are recycled, meanwhile, the flue gas is subjected to heat exchange and cooling through the first heat exchanger and the fourth heat exchanger in sequence, the temperature of the flue gas entering the absorption tower is controlled, and the absorption capacity of the carbon dioxide is improved; the return water of the heat supply network is subjected to heat exchange and temperature rise through the third heat exchanger, the second heat exchanger and the first heat exchanger in sequence, so that the heat utilization efficiency is improved, the heat supply income is increased, and the economic benefit of a power plant is improved.
The return water of the heat supply network is used as a cold source, so that the consumption and consumption of conventional circulating cooling water are reduced, and a certain water-saving effect is achieved.
Can provide heat supply network water with the temperature up to 130 ℃, and the water value of the heat supply network is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic diagram of a flue gas waste heat cascade utilization device with carbon dioxide capture.
FIG. 2 is a schematic view of another connection mode of the flue gas waste heat cascade utilization device with carbon dioxide capture.
In the figure, 1 is a first heat exchanger, 10 is a flue gas inlet, 11 is a flue gas heat exchange channel inlet of the first heat exchanger, 12 is a flue gas heat exchange channel outlet of the first heat exchanger, 13 is a hot water heat exchange channel inlet of the first heat exchanger, and 14 is a hot water heat exchange channel outlet of the first heat exchanger;
2, a second heat exchanger, 21, 22, 23 and 24 are respectively a second heat exchanger flue gas inlet, a second heat exchanger flue gas outlet, a second heat exchanger ionic liquid inlet and a second heat exchanger ionic liquid outlet;
3, an absorption tower, 31, 32, 33 and 34 are respectively provided with an absorption tower flue gas inlet, an absorption tower flue gas outlet, an absorption tower ionic liquid inlet and an absorption tower ionic liquid outlet;
4 is a desorption tower, 41 is a desorption tower ionic liquid inlet, 42 is a desorption tower ionic liquid outlet, and 43 is a desorption tower carbon dioxide outlet;
5 is a third heat exchanger, 51 is a carbon dioxide heat exchange channel inlet of the third heat exchanger, 52 is a carbon dioxide heat exchange channel outlet of the third heat exchanger, 53 is a hot water heat exchange channel inlet of the third heat exchanger, and 54 is a hot water heat exchange channel outlet of the third heat exchanger;
and 6 is a fourth heat exchanger, 61 is an inlet of an ionic liquid heat exchange channel of the fourth heat exchanger, 62 is an outlet of the ionic liquid heat exchange channel of the fourth heat exchanger, 63 is an inlet of a hot water heat exchange channel of the fourth heat exchanger, and 64 is an outlet of the hot water heat exchange channel of the fourth heat exchanger.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the utility model. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model.
Example 1:
referring to fig. 1 and 2, the utility model provides a gradient utilization device for flue gas waste heat with carbon dioxide capture, which includes a flue gas inlet 10, a first heat exchanger 1, a second heat exchanger 2, an absorption tower 3, a desorption tower 4, a third heat exchanger 5 and a fourth heat exchanger 6;
wherein the first heat exchanger 1 is provided with a first heat exchanger flue gas heat exchange channel inlet 11, a first heat exchanger flue gas heat exchange channel outlet 12, a first heat exchanger hot water heat exchange channel inlet 13 and a first heat exchanger hot water heat exchange channel outlet 14; the inlet 11 of the first heat exchanger flue gas heat exchange channel is communicated with the outlet 12 of the first heat exchanger flue gas heat exchange channel, and the inlet 13 of the first heat exchanger hot water heat exchange channel is communicated with the outlet 14 of the first heat exchanger hot water heat exchange channel;
the second heat exchanger 2 is provided with a second heat exchanger flue gas heat exchange channel inlet 21, a second heat exchanger flue gas heat exchange channel outlet 22, a second heat exchanger ionic liquid heat exchange channel inlet 23 and a second heat exchanger ionic liquid heat exchange channel outlet 24; the inlet 21 of the flue gas heat exchange channel of the second heat exchanger is communicated with the outlet 22 of the flue gas heat exchange channel of the second heat exchanger, the inlet 23 of the ionic liquid heat exchange channel of the second heat exchanger is communicated with the outlet 24 of the ionic liquid heat exchange channel of the second heat exchanger
The absorption tower 3 is provided with an absorption tower flue gas inlet 31, an absorption tower flue gas outlet 32, an absorption tower ionic liquid inlet 33 and an absorption tower ionic liquid outlet 34; the flue gas outlet 32 of the absorption tower is connected with a chimney;
the desorption tower 4 is provided with a desorption tower ionic liquid inlet 41, a desorption tower ionic liquid outlet 42 and a desorption tower carbon dioxide outlet 43;
the third heat exchanger 5 is provided with a third heat exchanger carbon dioxide heat exchange channel inlet 51, a third heat exchanger carbon dioxide heat exchange channel outlet 52, a third heat exchanger hot water heat exchange channel inlet 53 and a third heat exchanger hot water heat exchange channel outlet 54; a third heat exchanger carbon dioxide heat exchange channel inlet 51 is communicated with a third heat exchanger carbon dioxide heat exchange channel outlet 52, and a third heat exchanger hot water heat exchange channel inlet 53 is communicated with a third heat exchanger hot water heat exchange channel outlet 54; and the outlet 52 of the carbon dioxide heat exchange channel of the third heat exchanger is connected with a carbon dioxide storage tank.
The fourth heat exchanger 6 is provided with a fourth heat exchanger ionic liquid heat exchange channel inlet 61, a fourth heat exchanger ionic liquid heat exchange channel outlet 62, a fourth heat exchanger hot water heat exchange channel inlet 63 and a fourth heat exchanger hot water heat exchange channel outlet 64. The fourth heat exchanger ionic liquid heat exchange channel inlet 61 is communicated with the fourth heat exchanger ionic liquid heat exchange channel outlet 62, and the fourth heat exchanger hot water heat exchange channel inlet 63 is communicated with the fourth heat exchanger hot water heat exchange channel outlet 64.
Referring to fig. 1, in one embodiment, the outlet 12 of the first heat exchanger flue gas heat exchange channel is connected to the inlet 21 of the second heat exchanger flue gas heat exchange channel, and the outlet 22 of the second heat exchanger flue gas heat exchange channel is connected to the inlet 31 of the absorption tower flue gas; the absorption tower ionic liquid outlet 34 is connected with the second heat exchanger ionic liquid heat exchange channel inlet 23, the second heat exchanger ionic liquid heat exchange channel outlet 24 is connected with the desorption tower ionic liquid inlet 41, the desorption tower ionic liquid outlet 42 is connected with the fourth heat exchanger ionic liquid heat exchange channel inlet 61, the desorption tower carbon dioxide outlet 43 is connected with the third heat exchanger carbon dioxide heat exchange channel inlet 51, the third heat exchanger hot water heat exchange channel outlet 54 is connected with the fourth heat exchanger hot water heat exchange channel inlet 63, the fourth heat exchanger ionic liquid heat exchange channel outlet 62 is connected with the absorption tower ionic liquid inlet 33, and the fourth heat exchanger hot water heat exchange channel outlet 64 is connected with the first heat exchanger hot water heat exchange channel inlet 13.
Referring to fig. 2, in another embodiment, the outlet of the first heat exchanger flue gas heat exchange channel is 12 tower flue gas inlet 31; the flue gas inlet 10 is connected with the flue gas heat exchange channel inlet 21 of the second heat exchanger, and the flue gas heat exchange channel outlet 22 of the second heat exchanger is connected with the flue gas inlet 31 of the absorption tower.
Example 2:
as shown in fig. 1, flue gas enters a first heat exchanger flue gas heat exchange channel inlet 11 on a first heat exchanger 1 through a flue gas inlet 10, is subjected to heat exchange and temperature reduction, flows to a second heat exchanger flue gas heat exchange channel inlet 21 on a second heat exchanger 2 through a first heat exchanger flue gas heat exchange channel outlet 12, flows to an absorption tower 3 through a second heat exchanger flue gas heat exchange channel outlet 22 on the second heat exchanger 2 after being subjected to temperature reduction again, carbon dioxide of the flue gas is absorbed by ionic liquid in the absorption tower 3, and the flue gas losing the carbon dioxide is discharged through an absorption tower second flue gas outlet 32 and enters a chimney.
The carbon dioxide-rich ionic liquid flows to the second heat exchanger 2 through the absorption tower ionic liquid outlet 34 and the second heat exchanger ionic liquid heat exchange channel inlet 23, the temperature of the carbon dioxide-rich ionic liquid is raised in the second heat exchanger 2, and the carbon dioxide-rich ionic liquid flows to the desorption tower 4 through the second heat exchanger ionic liquid heat exchange channel outlet 24 and the desorption tower ionic liquid inlet 41.
The heated carbon dioxide-rich ionic liquid is desorbed in the desorption tower 4, desorbed carbon dioxide flows to the third heat exchanger 5 through the desorption tower carbon dioxide outlet 43 and the third heat exchanger carbon dioxide heat exchange channel inlet 51, heat supply network water flows to the third heat exchanger 5 through the third heat exchanger hot water heat exchange channel inlet 53, heat exchange is carried out between the heat supply network water and the carbon dioxide in the third heat exchanger 5, the heat supply network water is heated and cooled, the cooled carbon dioxide is sent to the carbon dioxide storage tank through the third heat exchanger carbon dioxide heat exchange channel outlet 52, and the heated heat supply network water is sent to the fourth heat exchanger 6 through the third heat exchanger hot water heat exchange channel outlet 54 and the fourth heat exchanger hot water heat exchange channel inlet 63.
The carbon dioxide-poor ionic liquid desorbed from the desorption tower 4 is sent to the fourth heat exchanger 6 through the desorption tower ionic liquid outlet 42 and the fourth heat exchanger ionic liquid heat exchange channel inlet 61, the carbon dioxide-poor ionic liquid exchanges heat with heat supply network water in the fourth heat exchanger 6, the carbon dioxide-poor ionic liquid is sent to the absorption tower 4 through the fourth heat exchanger ionic liquid heat exchange channel outlet 62 and the absorption tower ionic liquid inlet 33 after being cooled, the heat supply network water is sent to the first heat exchanger 1 through the fourth heat exchanger hot water heat exchange channel outlet 64 and the first heat exchanger hot water heat exchange channel inlet 13 after being heated, the heat supply network water exchanges heat with flue gas in the first heat exchanger 1, and the heated heat supply network water returns to the heat supply network through the first heat exchanger hot water heat exchange channel outlet 14.
And heating the heat supply network water to 100-130 ℃ in the second heat exchanger.
Example 3:
as shown in fig. 2, the flue gas enters the first heat exchanger 1 through the flue gas inlet 10 and the flue gas inlet 11 of the first heat exchanger, enters the second heat exchanger 3 through the flue gas inlet 10 and the flue gas inlet 31 of the second heat exchanger, and a part of the flue gas exchanges heat with heat supply network water in the first heat exchanger 1 to be cooled and then enters the absorption tower 3 through the heat supply network water outlet 12 of the first heat exchanger and the flue gas inlet 31 of the absorption tower;
the other part of the flue gas enters the second heat exchanger 2, the heat in the flue gas is stored by the second heat exchanger 2, and the cooled flue gas enters the absorption tower 2 through a flue gas outlet 22 of the second heat exchanger and a flue gas inlet 31 of the absorption tower;
the flue gas contacts the ionic liquid in the absorption tower 3, the ionic liquid absorbs the carbon dioxide in the flue gas, and the flue gas with the absorbed carbon dioxide is discharged from a flue gas outlet 32 of the absorption tower and enters a chimney;
the carbon dioxide-rich ionic liquid enters the second heat exchanger 2 through the absorption tower ionic liquid outlet 34 and the second heat exchanger ionic liquid inlet 23, heat is absorbed in the second heat exchanger 2, the heated ionic liquid enters the desorption tower 4 through the second heat exchanger ionic liquid outlet 24 and the desorption tower ionic liquid inlet 41, desorption occurs in the desorption tower 4, desorbed carbon dioxide enters the third heat exchanger 5 through the desorption tower carbon dioxide outlet 43 and the third heat exchanger carbon dioxide inlet 51, and carbon dioxide-poor ionic liquid enters the fourth heat exchanger 6 through the desorption tower ionic liquid outlet 42 and the fourth heat exchanger ionic liquid inlet 63;
the heat supply network water enters a third heat exchanger 5 through a third heat exchanger heat supply network water inlet 53 of the third heat exchanger 53, heat exchange is carried out with carbon dioxide, the heat supply network water is heated and cooled, the cooled carbon dioxide is discharged through a third heat exchanger carbon dioxide outlet 52 and enters a carbon dioxide storage tank, the heated heat supply network water enters a fourth heat exchanger 6 through a third heat exchanger heat supply network water outlet 54 and a fourth heat exchanger heat supply network water inlet 61, the carbon dioxide-poor ionic liquid in the fourth heat exchanger 6 exchanges heat with the heat supply network water, the ionic liquid is cooled and enters an absorption tower 3 through a fourth heat exchanger ionic liquid outlet 64 and an absorption tower ionic liquid inlet 33, the heat supply network water is heated in the fourth heat exchanger 6 and enters a first heat exchanger 1 through a fourth heat exchanger heat supply network water outlet 62 and a first heat exchanger heat supply network water inlet 13, heat exchange is carried out with flue gas in the first heat exchanger 1, the flue gas is cooled, and the heat supply network water is heated;
after the temperature of the heat supply network water is raised in the first heat exchanger 1, the temperature is higher than 100 ℃ and lower than 130 ℃, and the heat supply network water is discharged through a heat supply network water outlet 13 of the first heat exchanger and enters a heat supply network.
The utility model utilizes the characteristic that the absorption capacity of the ionic liquid to the carbon dioxide is reduced along with the increase of the temperature, absorbs the carbon dioxide at low temperature, releases the carbon dioxide at high temperature, and recycles the heat of the high-temperature carbon dioxide-rich ionic liquid and the heat in the smoke. Meanwhile, the flue gas is subjected to heat exchange and cooling through the first heat exchanger 1 and the fourth heat exchanger 6 in sequence, so that the temperature of the flue gas entering the absorption tower 3 is controlled, and the absorption capacity of carbon dioxide is improved; the return water of the heat supply network is subjected to heat exchange and temperature rise through the third heat exchanger 5, the second heat exchanger 2 and the first heat exchanger 1 in sequence, the heat utilization efficiency of the system is high, the water of the heat supply network can finally reach 100-130 ℃, and the water value of the heat supply network at the temperature is high.
The return water of the heat supply network is used as a cold source, so that the consumption of circulating cooling water is reduced, and a certain water-saving effect is achieved. The temperature of the flue gas entering the absorption tower 3 is reduced and the absorption capacity of carbon dioxide is improved through the step temperature reduction of the flue gas and the step temperature rise of the return water of the heat supply network; meanwhile, the cascade utilization of the flue gas waste heat is realized, the method in the figure 2 combines the heat storage function of the heat exchanger, the heat utilization efficiency is improved, and the heat supply benefit is improved.
It will be appreciated by those skilled in the art that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the utility model are intended to be embraced therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the utility model without departing from the spirit and scope of the utility model, which is to be covered by the claims.
Claims (9)
1. The cascade utilization device for the flue gas waste heat with carbon dioxide capture is characterized by comprising a first heat exchanger (1), a second heat exchanger (2), an absorption tower (3), a desorption tower (4), a third heat exchanger (5) and a fourth heat exchanger (6);
the first heat exchanger (1) is provided with a first heat exchanger flue gas heat exchange channel inlet (11), a first heat exchanger flue gas heat exchange channel outlet (12) and a first heat exchanger hot water heat exchange channel inlet (13); the first heat exchanger flue gas heat exchange channel inlet (11) is communicated with the first heat exchanger flue gas heat exchange channel outlet (12);
the second heat exchanger (2) is provided with a second heat exchanger ionic liquid heat exchange channel inlet (23) and a second heat exchanger ionic liquid heat exchange channel outlet (24); an inlet (23) of the ionic liquid heat exchange channel of the second heat exchanger is communicated with an outlet (24) of the ionic liquid heat exchange channel of the second heat exchanger;
a third heat exchanger carbon dioxide heat exchange channel inlet (51), a third heat exchanger hot water heat exchange channel inlet (53) and a third heat exchanger hot water heat exchange channel outlet (54) are arranged on the third heat exchanger (5); the inlet (53) of the hot water heat exchange channel of the third heat exchanger is communicated with the outlet (54) of the hot water heat exchange channel of the third heat exchanger;
a fourth heat exchanger ionic liquid heat exchange channel inlet (61), a fourth heat exchanger ionic liquid heat exchange channel outlet (62), a fourth heat exchanger hot water heat exchange channel inlet (63) and a fourth heat exchanger hot water heat exchange channel outlet (64) are arranged on the fourth heat exchanger (6); an inlet (61) of the fourth heat exchanger ionic liquid heat exchange channel is communicated with an outlet (62) of the fourth heat exchanger ionic liquid heat exchange channel, and an inlet (63) of the fourth heat exchanger hot water heat exchange channel is communicated with an outlet (64) of the fourth heat exchanger hot water heat exchange channel;
the absorption tower (3) is provided with an absorption tower flue gas inlet (31), an absorption tower ionic liquid inlet (33) and an absorption tower ionic liquid outlet (34);
the desorption tower (4) is provided with a desorption tower ionic liquid inlet (41), a desorption tower ionic liquid outlet (42) and a desorption tower carbon dioxide outlet (43);
the first heat exchanger flue gas heat exchange channel inlet (11) is connected with the flue gas inlet (10); the outlet (12) of the first heat exchanger flue gas heat exchange channel is communicated with the flue gas inlet (31) of the absorption tower;
an inlet (23) of the ionic liquid heat exchange channel of the second heat exchanger is connected with an ionic liquid outlet (34) of the absorption tower, and an outlet (24) of the ionic liquid heat exchange channel of the second heat exchanger is connected with an ionic liquid inlet (41) of the desorption tower;
a hot water heat exchange channel inlet (53) of the third heat exchanger is connected with a heat supply network water input pipe; a third heat exchanger hot water heat exchange channel outlet (54) is connected with a fourth heat exchanger hot water heat exchange channel inlet (63), and a fourth heat exchanger hot water heat exchange channel outlet (64) is connected with a first heat exchanger hot water heat exchange channel inlet (13);
an ion liquid outlet (42) of the desorption tower is connected with an ion liquid heat exchange channel inlet (61) of the fourth heat exchanger, and an ion liquid heat exchange channel outlet (62) of the fourth heat exchanger is connected with an ion liquid inlet (33) of the absorption tower;
and a carbon dioxide outlet (43) of the desorption tower is connected with a carbon dioxide heat exchange channel inlet (51) of the third heat exchanger.
2. The cascade utilization device of the flue gas waste heat with carbon dioxide capture as claimed in claim 1, wherein the second heat exchanger (2) is further provided with a second heat exchanger flue gas heat exchange channel inlet (21) and a second heat exchanger flue gas heat exchange channel outlet (22), and the second heat exchanger flue gas heat exchange channel inlet (21) is communicated with the second heat exchanger flue gas heat exchange channel outlet (22);
the first heat exchanger flue gas heat exchange channel outlet (12) is communicated with the absorption tower flue gas inlet (31) through the second heat exchanger flue gas heat exchange channel inlet (21) and the second heat exchanger flue gas heat exchange channel outlet (22).
3. The cascade utilization device of the flue gas waste heat with carbon dioxide capture as claimed in claim 2, wherein the second heat exchanger (2) is further provided with a second heat exchanger flue gas heat exchange channel inlet (21) and a second heat exchanger flue gas heat exchange channel outlet (22), and the second heat exchanger flue gas heat exchange channel inlet (21) is communicated with the second heat exchanger flue gas heat exchange channel outlet (22);
the flue gas inlet (10) is also connected with a flue gas heat exchange channel inlet (21) of a second heat exchanger, and a flue gas heat exchange channel outlet (22) of the second heat exchanger is connected with a flue gas inlet (31) of the absorption tower.
4. The cascade utilization device of the flue gas waste heat with carbon dioxide capture as claimed in claim 1, wherein the first heat exchanger (1) is provided with a first heat exchanger hot water heat exchange channel outlet (14), the first heat exchanger hot water heat exchange channel outlet (14) is communicated with the first heat exchanger hot water heat exchange channel inlet (13), and the first heat exchanger hot water heat exchange channel outlet (14) is connected with a heat supply network.
5. The cascade utilization device of the flue gas waste heat with carbon dioxide capture as claimed in claim 1, wherein the absorption tower (3) is provided with an absorption tower flue gas outlet (32).
6. The cascade utilization device for the waste heat of flue gas with carbon dioxide capture as claimed in claim 5, wherein the flue gas outlet (32) of the absorption tower is arranged at the top of the absorption tower (3) and connected with a chimney.
7. The cascade utilization device of the flue gas waste heat with carbon dioxide capture as claimed in claim 1, wherein the absorption tower ionic liquid outlet (34) is arranged at the bottom of the absorption tower (3); the desorption tower ionic liquid outlet (42) is arranged at the bottom of the desorption tower (4); the carbon dioxide outlet (43) of the desorption tower is arranged at the top of the desorption tower (4).
8. The cascade utilization device of the flue gas waste heat with carbon dioxide capture as claimed in claim 1, wherein the third heat exchanger (5) is provided with a third heat exchanger carbon dioxide heat exchange channel outlet (52) communicated with a third heat exchanger carbon dioxide heat exchange channel inlet (51); an outlet (52) of the carbon dioxide heat exchange channel of the third heat exchanger is connected with a carbon dioxide storage tank.
9. The cascade utilization device of the flue gas waste heat with carbon dioxide capture as claimed in claim 1, wherein the temperature of the heat supply network water after heat exchange and temperature rise through the first heat exchanger (1) is greater than 100 ℃ and less than 130 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123236577.7U CN216498544U (en) | 2021-12-21 | 2021-12-21 | Flue gas waste heat cascade utilization device with carbon dioxide capture function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123236577.7U CN216498544U (en) | 2021-12-21 | 2021-12-21 | Flue gas waste heat cascade utilization device with carbon dioxide capture function |
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| Publication Number | Publication Date |
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| CN216498544U true CN216498544U (en) | 2022-05-13 |
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|---|---|---|---|
| CN202123236577.7U Active CN216498544U (en) | 2021-12-21 | 2021-12-21 | Flue gas waste heat cascade utilization device with carbon dioxide capture function |
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| CN (1) | CN216498544U (en) |
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2021
- 2021-12-21 CN CN202123236577.7U patent/CN216498544U/en active Active
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