CN210385368U - Carbon dioxide capture system based on power supply of coal-fired steam injection boiler system - Google Patents
Carbon dioxide capture system based on power supply of coal-fired steam injection boiler system Download PDFInfo
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- CN210385368U CN210385368U CN201920978025.7U CN201920978025U CN210385368U CN 210385368 U CN210385368 U CN 210385368U CN 201920978025 U CN201920978025 U CN 201920978025U CN 210385368 U CN210385368 U CN 210385368U
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Abstract
The utility model provides a carbon dioxide entrapment system based on coal-fired steam injection boiler system power supply, it includes absorption tower, rich liquid pump, poor rich liquid heat exchanger, desorber, poor liquid pump, poor liquid cooler, coal-fired steam injection boiler system, turbo generator, boiling ware. The desalted water absorbs heat and is heated up, and then enters a coal-fired steam-injection boiler system through a first outlet of a lean solution cooler; the demineralized water is changed into high-temperature high-pressure steam in a coal-fired steam injection boiler system, a part of the high-temperature high-pressure steam is introduced into a steam turbine generator, the high-temperature high-pressure steam is converted into electric energy and low-temperature low-pressure steam in the steam turbine generator, and the steam turbine generator is electrically connected with a rich liquid pump and a lean liquid pump so as to provide electric energy for the rich liquid pump and the lean liquid pump; and the low-temperature and low-pressure steam enters the boiler to perform third heat exchange with part of liquid at the bottom of the desorption tower. The electric energy generated by the turbonator can be used for supplying power to the pregnant solution pump and the barren solution pump, so that the electric energy additionally consumed by the pregnant solution pump and the barren solution pump is saved, and the capture cost is reduced.
Description
Technical Field
The utility model relates to a carbon dioxide entrapment field especially relates to a carbon dioxide entrapment system based on coal-fired steam injection boiler system power supply.
Background
CO in the atmosphere due to the massive combustion of fossil fuels2The content of (A) also continuously increases, and a large amount of CO2The greenhouse effect is more and more serious, and the negative impact on the global ecological balance and the development of the human society is not negligible.
CO2The emission reduction mainly has three modes, the first mode is to improve the energy efficiency, and the energy efficiency of equipment and process can be improved to effectively reduce CO2And (4) discharging. The second is to search alternative energy sources, and the discovery of new energy sources and the utilization of clean energy sources can reduce the use of fossil energy sources, thereby effectively reducing CO2And (4) discharging. The third is to CO2Trapping and sequestration (CCS) was performed. The former two modes are difficult to develop in a breakthrough manner in a short time, and the discharged CO is difficult to be treated2Capture and sequestration have become a reduction of atmospheric CO2The most direct and efficient way of discharging.
Currently, organic amines are used to capture CO2The technology is the most mature technology at present, and an organic amine method is used for capturing CO2The main disadvantage of the technology is that the regeneration energy consumption of the desorption tower is too high, in order to more effectively reduce CO2Emission, development of new CO2The trapping system, scholars at home and abroad, is continuously optimizing and developing the existing flow.
Whereas the coal-fired steam-injection boiler is flue gas CO2The 'blue sea' of the trapping technology has no demonstration engineering construction at present, and no specific technical achievement is published.
SUMMERY OF THE UTILITY MODEL
In view of the problems existing in the background art, the present invention is directed to a carbon dioxide capture system based on the power supply of a coal-fired steam injection boiler system, which uses the steam power generation technology for the regeneration of carbon dioxide and an absorbent, and simultaneously effectively utilizes the waste heat generated by the regeneration of carbon dioxide and the absorbent in a desorption tower to heat the make-up water injected into the coal-fired steam injection boiler system, thereby reducing the carbon dioxide capture cost and the boiler coal consumption.
In order to realize the above purpose, the utility model provides a carbon dioxide entrapment system based on coal-fired steam injection boiler system power supply, it includes absorption tower, rich liquid pump, poor rich liquid heat exchanger, desorber, poor liquid pump, lean liquid cooler, coal-fired steam injection boiler system, turbo generator, boiling ware.
The absorption tower comprises: the first inlet of the absorption tower is positioned at the lower part of the absorption tower and is used for flue gas to enter; the second inlet of the absorption tower is positioned at the upper part of the absorption tower; the first outlet of the absorption tower is positioned at the bottom of the absorption tower; and the second outlet of the absorption tower is positioned at the top of the absorption tower.
The lean-rich liquid heat exchanger comprises: a lean-rich liquor heat exchanger first inlet; a second inlet of the lean-rich liquor heat exchanger; a first outlet of the lean-rich liquid heat exchanger; and a second outlet of the lean-rich liquid heat exchanger.
One side of the rich liquid pump is communicated with a first outlet of the absorption tower, and the other side of the rich liquid pump is communicated with a first inlet of the lean-rich liquid heat exchanger.
The desorption tower comprises: the first inlet of the desorption tower is positioned at the upper part of the desorption tower and communicated with the first outlet of the lean-rich liquid heat exchanger; the second inlet of the desorption tower is positioned at the bottom of the desorption tower; the first outlet of the desorption tower is positioned at the bottom of the desorption tower; the second outlet of the desorption tower is positioned at the top of the desorption tower; and the third outlet of the desorption tower is positioned at the lower part of the desorption tower.
One side of the lean liquid pump is communicated with the first outlet of the desorption tower, and the other side of the lean liquid pump is communicated with the second inlet of the lean-rich liquid heat exchanger.
The lean liquid cooler includes: the first inlet of the lean solution cooler is communicated with the second outlet of the lean-rich solution heat exchanger; a lean liquor cooler second inlet for external demineralized water to enter; the first outlet of the barren liquor cooler is communicated with a coal-fired steam injection boiler system; and a second outlet of the lean liquid cooler is communicated with a second inlet of the absorption tower.
The steam turbine generator includes: the steam turbine generator steam inlet is communicated with the coal-fired steam injection boiler system; a steam outlet of the steam turbine generator; and the power generation interface of the turbonator is electrically connected with the rich liquid pump and the lean liquid pump respectively.
The boiler comprises: the first inlet of the boiler is communicated with the steam outlet of the steam turbine generator; the second inlet of the boiler is communicated with the third outlet of the desorption tower; the first outlet of the boiler is communicated with a coal-fired steam injection boiler system; and the second outlet of the boiler is communicated with the second inlet of the desorption tower.
The flue gas enters the absorption tower through the first inlet of the absorption tower and moves from bottom to top, the absorbent enters the absorption tower through the second inlet of the absorption tower and sprays downwards, the downwards-sprayed absorbent is in countercurrent contact with the flue gas, so that the absorbent absorbs carbon dioxide in the flue gas and changes into rich liquid, the rich liquid is settled downwards, and the flue gas without the carbon dioxide continues to move upwards and is discharged through the second outlet of the absorption tower; pumping the rich solution from a first outlet of the absorption tower and a first inlet of the lean-rich solution heat exchanger to the lean-rich solution heat exchanger through a rich solution pump for first heat exchange, and absorbing heat and raising the temperature of the rich solution;
the rich liquid which completes the first heat exchange enters a desorption tower through a first outlet of the lean-rich liquid heat exchanger and a first inlet of the desorption tower, the rich liquid is heated and desorbed in the desorption tower and is decomposed into lean liquid and carbon dioxide, the lean liquid is settled downwards in the desorption tower, and the carbon dioxide moves upwards and is discharged through a second outlet of the desorption tower;
the lean solution desorbed from the desorption tower is pumped into the lean-rich solution heat exchanger from a first outlet of the desorption tower and a second inlet of the lean-rich solution heat exchanger through a lean solution pump, and performs the first heat exchange with the rich solution entering from the first inlet of the lean-rich solution heat exchanger, so that the lean solution releases heat and is cooled;
the lean solution which completes the first heat exchange enters a lean solution cooler through a second outlet of the lean-rich solution heat exchanger and a first inlet of the lean solution cooler, the lean solution and desalted water entering through a second inlet of the lean solution cooler are subjected to second heat exchange, the lean solution releases heat again and is cooled, and the cooled lean solution enters an absorption tower through a second outlet of the lean solution cooler and a second inlet of the absorption tower to be used as the absorbent;
the desalted water entering through the second inlet of the lean solution cooler absorbs heat and is heated, and the desalted water after absorbing heat and heating enters the coal-fired steam injection boiler system through the first outlet of the lean solution cooler to be used as make-up water of the coal-fired steam injection boiler system;
the make-up water is changed into high-temperature high-pressure steam under the action of a coal-fired steam injection boiler system, a part of the high-temperature high-pressure steam is introduced into a turbonator, the high-temperature high-pressure steam is changed into electric energy and low-temperature low-pressure steam in the turbonator, and a turbonator power generation interface of the turbonator is electrically connected with a rich liquid pump and a lean liquid pump so as to provide electric energy for the rich liquid pump and the lean liquid pump;
the low-temperature and low-pressure steam enters the boiler through the steam outlet of the steam turbine generator and the first inlet of the boiler to carry out third heat exchange;
part of liquid at the bottom of the desorption tower enters the boiler through a third outlet of the desorption tower and a second inlet of the boiler, and carries out the third heat exchange with low-temperature and low-pressure steam entering the boiler through the first inlet of the boiler, wherein the part of liquid absorbs heat in the boiler to be heated up and is partially vaporized and enters the desorption tower through the second outlet of the boiler and the second inlet of the desorption tower so as to provide steam and heat for desorption of rich liquid in the desorption tower; the low-temperature low-pressure steam in the boiler releases heat and is cooled to become condensed water, and the condensed water enters the coal-fired steam injection boiler system through the first outlet of the boiler to be used as make-up water of the coal-fired steam injection boiler system.
In one embodiment, a coal-fired steam injection boiler system includes a boiler deaerator, a boiler drum, and a steam injection boiler body.
The boiler deaerator includes: the first inlet of the boiler deaerator is communicated with the first outlet of the lean liquid cooler; and an outlet of the boiler deaerator.
The boiler drum includes: the first inlet of the boiler drum is communicated with the outlet of the boiler deaerator; and (4) a boiler drum outlet.
The steam injection boiler body includes: the inlet of the steam injection boiler body is communicated with the outlet of the boiler drum; the first outlet of the steam injection boiler body is communicated with a steam inlet of the steam turbine generator; and a second outlet of the steam injection boiler body.
The desalted water entering through the second inlet of the lean liquid cooler absorbs heat and is heated after the second heat exchange, the desalted water absorbing heat and heating the desalted water enters the boiler deaerator through the first outlet of the lean liquid cooler and the first inlet of the boiler deaerator to be deaerated, and the deaerated desalted water enters the boiler steam drum through the outlet of the boiler deaerator and the first inlet of the boiler steam drum to be vaporized and changed into steam; steam enters the steam injection boiler body through the boiler steam drum outlet and the steam injection boiler body inlet, the steam is heated in the steam injection boiler body to become high-temperature high-pressure steam, and a part of the high-temperature high-pressure steam enters the steam turbine generator through the first steam injection boiler body outlet and the steam turbine generator steam inlet to provide steam for the steam turbine generator; the other part of the high-temperature and high-pressure steam flows to the outside through a second outlet of the steam injection boiler body.
In one embodiment, the boiler deaerator further comprises: and a second inlet of the boiler deaerator.
The carbon dioxide capture system based on power supply of the coal-fired steam injection boiler system further comprises a regeneration gas cooler, a compressor and a compressed gas cooler.
The regeneration gas cooler includes: the first inlet of the regeneration gas cooler is communicated with the second outlet of the desorption tower; a second inlet of the regeneration gas cooler for the entry of external desalted water; the first outlet of the regenerated gas cooler is communicated with the second inlet of the boiler deaerator; a second outlet of the regeneration gas cooler.
The compressor includes: the compressor inlet is communicated with the second outlet of the regeneration gas cooler; and (4) an outlet of the compressor.
The compressed gas cooler comprises: a first inlet of the compressed gas cooler, which is communicated with the outlet of the compressor; a second inlet of the compressed gas cooler for the entry of external demineralized water; a compressed gas cooler first outlet; and the second outlet of the compressed gas cooler is communicated with the second inlet of the boiler deaerator.
Wherein the carbon dioxide discharged from the second outlet of the desorption tower enters the regeneration gas cooler through the first inlet of the regeneration gas cooler and carries out fourth heat exchange with the desalted water entering through the second inlet of the regeneration gas cooler,
the carbon dioxide releases heat and cools, then enters a compressor through a second outlet of the regeneration gas cooler and a first inlet of the compressor, the carbon dioxide is compressed and pressurized by the compressor, the pressurized carbon dioxide enters the compression gas cooler through a second outlet of the compressor and a first inlet of the compression gas cooler to carry out fifth heat exchange, the carbon dioxide releases heat and cools again, and then is discharged through a first outlet of the compression gas cooler;
the desalted water entering through the second inlet of the regenerated gas cooler and the carbon dioxide entering through the first inlet of the regenerated gas cooler are subjected to fourth heat exchange, the desalted water absorbs heat and is heated, then enters the boiler deaerator through the first outlet of the regenerated gas cooler and the second inlet of the boiler deaerator to be deaerated, and the deaerated desalted water enters the boiler drum through the outlet of the boiler deaerator and the inlet of the boiler drum to be used as make-up water;
the desalted water entering through the second inlet of the compressed gas cooler and the carbon dioxide entering through the first inlet of the compressed gas cooler are subjected to fifth heat exchange, the desalted water absorbs heat and is heated up, then enters the boiler deaerator through the second outlet of the compressed gas cooler and the second inlet of the boiler deaerator to be deaerated, and the deaerated water enters the boiler steam drum through the outlet of the boiler deaerator and the inlet of the boiler steam drum to be used as make-up water.
In one embodiment, the turbine generator power generation interface of the turbine generator is also electrically connected to the compressor to supply power to the compressor.
In an embodiment, the boiler drum further comprises a boiler drum second inlet, the boiler drum second inlet being in communication with the boiler first outlet; wherein the condensed water discharged through the first outlet of the boiler enters the boiler drum through the second inlet of the boiler drum to be used as make-up water of the boiler drum.
In an embodiment, the carbon dioxide capture system of the coal fired boiler further comprises an induced draft fan. The draught fan includes: the inlet of the induced draft fan is used for external flue gas to enter; the outlet of the induced draft fan is communicated with the first inlet of the absorption tower; wherein, outside flue gas enters into the draught fan through the draught fan entry, then enters into the absorption tower through draught fan export, the first entry of absorption tower.
In one embodiment, the power generation interface of the steam turbine generator is also electrically connected with the induced draft fan to supply power to the induced draft fan.
In one embodiment, an inlet of the induced draft fan is communicated with the coal-fired steam injection boiler system, so that flue gas generated by the coal-fired steam injection boiler system enters the absorption tower through the induced draft fan to capture carbon dioxide.
The utility model has the advantages as follows:
according to the utility model discloses an in the carbon dioxide entrapment system based on coal-fired steam injection boiler system power supply, accomplish the barren liquor of first heat exchange and still have higher heat, accomplish the barren liquor of first heat exchange and carry out the second heat exchange with the demineralized water that flows in via barren liquor cooler second entry in the barren liquor cooler, the barren liquor continues to release heat and lowers the temperature, the demineralized water heat absorption intensifies, the demineralized water that the heat absorption intensifies flows into and uses as the make-up water in the coal-fired steam injection boiler system, the used heat of barren liquor has been retrieved effectively to this heat transfer process, and the demineralized water that the heat absorption intensifies has reduced the coal consumption of coal-fired steam injection boiler system in the heating make-up water process, and then reduced the cost of carbon dioxide entrapment system entrapment carbon dioxide based on coal-fired steam injection boiler; in addition, the coal-fired steam injection boiler system outputs high-temperature high-pressure steam to the steam turbine generator, the steam turbine generator converts the high-temperature high-pressure steam into electric energy and low-temperature low-pressure steam, the rich liquid pump and the lean liquid pump are electrically connected with a power generation interface of the steam turbine generator, and the electric energy generated by the steam turbine generator can be used for supplying power to the rich liquid pump and the lean liquid pump, so that the electric energy additionally consumed by the rich liquid pump and the lean liquid pump in the process of capturing carbon dioxide is saved; moreover, the generated low-temperature and low-pressure steam is directly introduced into the boiler and exchanges heat with the liquid entering from the second inlet of the boiler in the boiler, so that the low-temperature and low-pressure steam generated by the turbonator is effectively recycled, the energy consumption for additionally providing the steam for the boiler is avoided, and the trapping cost is saved; in addition, the low-temperature low-pressure steam is changed into condensed water after releasing heat and reducing the temperature in the boiler, the condensed water is directly injected into the coal-fired steam injection boiler system to be used as make-up water, the waste water is effectively recycled and utilized, meanwhile, the make-up water is required to be heated and converted into steam in the coal-fired steam injection boiler system, the condensed water has higher temperature compared with the ordinary boiler make-up water, the coal consumption in the process that the condensed water with higher temperature is converted into steam in the coal-fired steam injection boiler system is less than that of the ordinary make-up water, therefore, the recycling of the condensed water also reduces the energy consumption of the coal-fired steam injection boiler system, and the cost is saved.
Drawings
Fig. 1 is a schematic diagram of a carbon dioxide capture system based on power supply to a coal fired steam injection boiler system according to the present invention.
Wherein the reference numerals are as follows:
11 absorption tower 173 steam injection boiler body
11A1 absorption tower first inlet 173A steam injection boiler body inlet
11A2 second inlet 173B1 steam injection boiler body first outlet of absorption tower
11B1 absorption tower first outlet
11B2 second outlet 173B2 second outlet of steam-injection boiler body
12 rich liquid pump
13 poor rich liquor heat exchanger 18 steam turbine generator
13A1 lean-rich liquor heat exchanger first inlet 18A steam turbine generator steam inlet
13A2 lean-rich liquid heat exchanger second inlet 18B steam turbine generator steam outlet
13B1 lean and rich liquor heat exchanger first outlet 18C turbo generator power generation interface
14 Desorption column 19A1 boiler first inlet
14A1 Desorption column first inlet 19A2 boiler second inlet
14A2 Desorption column second inlet 19B1 boiler first outlet
14B1 Desorption column first outlet 19B2 boiler second outlet
14B2 desorber second outlet 20 regeneration gas cooler
14B3 desorber third outlet 20A1 regeneration gas cooler first inlet
15 lean liquid pump 20a2 regeneration gas cooler second inlet
16 lean liquid cooler 20B1 regeneration air cooler first outlet
16A1 lean liquid cooler first inlet 20B2 regeneration air cooler second outlet
16A2 lean liquid cooler second inlet 21 compressor
16B1 lean cooler first outlet 21A compressor inlet
16B2 lean cooler second outlet 21B compressor outlet
17 coal-fired steam injection boiler system 22 compressed gas cooler
171 boiler deaerator 22a1 compressed gas cooler first inlet
171A1 first boiler deaerator inlet 22A2 second compressed gas cooler inlet
171A2 boiler deaerator second inlet 22B1 compressed gas cooler first outlet
171B boiler deaerator outlet 22B2 compressed gas cooler second outlet
172 boiler drum 23 induced draft fan
172A1 boiler drum first inlet 23A induced draft fan inlet
Outlet of draught fan 23B at second inlet of boiler drum 172A2
172B boiler drum outlet
Detailed Description
Referring to fig. 1, the carbon dioxide capture system based on power supply of the coal-fired steam injection boiler system of the present invention includes an absorption tower 11, a rich solution pump 12, a lean and rich solution heat exchanger 13, a desorption tower 14, a lean solution pump 15, a lean solution cooler 16, a coal-fired steam injection boiler system 17, a turbo generator 18, and a boiler 19. The utility model discloses a carbon dioxide entrapment system based on coal-fired steam injection boiler system power supply still includes regeneration gas cooler 20, compressor 21, compressed gas cooler 22 and draught fan 23.
The absorption tower 11 includes: a first inlet 11a1 of the absorption tower, which is located at the lower part of the absorption tower 11 and is used for flue gas to enter; a second inlet 11a2 of the absorption column, which is located at the upper part of the absorption column 11; a first outlet 11B1 of the absorption column, which is located at the bottom of the absorption column 11; and a second outlet 11B2 of the absorption column, which is located at the top of the absorption column 11.
The lean-rich liquid heat exchanger 13 includes: lean-rich liquor heat exchanger first inlet 13a 1; lean-rich liquor heat exchanger second inlet 13a 2; lean-rich liquid heat exchanger first outlet 13B 1; lean-rich liquid heat exchanger second outlet 13B 2.
One side of the rich liquid pump 12 is communicated with the first outlet 11B1 of the absorption tower, and the other side is communicated with the first inlet 13a1 of the lean rich liquid heat exchanger.
The desorption tower 14 includes: a first inlet 14A1 of the desorption tower, which is positioned at the upper part of the desorption tower 14 and is communicated with a first outlet 13B1 of the lean-rich liquid heat exchanger; a desorber second inlet 14a2 located at the bottom of desorber 14; a desorber first outlet 14B1 located at the bottom of desorber 14; a desorber second outlet 14B2 located at the top of desorber 14; and a third outlet 14B3 of the desorber, which is located at the lower part of the desorber 14.
One side of the lean liquid pump 15 is communicated with the first outlet 14B1 of the desorption tower, and the other side is communicated with the second inlet 13A2 of the lean-rich liquid heat exchanger.
The lean liquid cooler 16 includes: a lean liquid cooler first inlet 16A1 communicating with a lean rich liquid heat exchanger second outlet 13B 2; a lean liquid cooler second inlet 16a2 for external demineralized water to enter; a lean liquor cooler first outlet 16B1, which is communicated with the coal-fired steam injection boiler system 17; the lean liquid cooler second outlet 16B2 is connected to the absorber second inlet 11a 2.
The turbo generator 18 includes: a steam turbine generator steam inlet 18A which is communicated with a coal-fired steam injection boiler system 17; a steam turbine generator steam outlet 18B; the turbine generator power generation interface 18C is electrically connected to the rich liquid pump 12 and the lean liquid pump 15, respectively (the dotted line in fig. 1 represents an electrical connection relationship).
The boiler 19 comprises: the boiler first inlet 19A1 is communicated with the steam outlet 18B of the turbonator; the boiler second inlet 19A2 is communicated with the desorption tower third outlet 14B 3; the first boiler outlet 19B1 is communicated with the coal-fired steam injection boiler system 17; the boiler second outlet 19B2 is connected to the desorber second inlet 14A 2.
The flue gas enters the absorption tower 11 through the first inlet 11a1 of the absorption tower and moves from bottom to top, the absorbent enters the absorption tower 11 through the second inlet 11a2 of the absorption tower and sprays downwards, the absorbent spraying downwards contacts with the flue gas in a countercurrent manner, so that the absorbent absorbs carbon dioxide in the flue gas to become rich liquid, the rich liquid settles downwards, and the flue gas without carbon dioxide continues to move upwards and is discharged through the second outlet 11B2 of the absorption tower;
the rich liquid is pumped into the lean-rich liquid heat exchanger 13 from the first outlet 11B1 of the absorption tower and the first inlet 13A1 of the lean-rich liquid heat exchanger through a rich liquid pump 12 to perform first heat exchange, and the rich liquid absorbs heat and is heated;
the rich liquid that completes the first heat exchange enters the desorption tower 14 through the lean rich liquid heat exchanger first outlet 13B1 and the desorption tower first inlet 14a1, the rich liquid is heated and desorbed in the desorption tower 14 and is decomposed into lean liquid and carbon dioxide, the lean liquid settles down in the desorption tower 14, and the carbon dioxide moves upward and is discharged through the desorption tower second outlet 14B 2;
the lean liquid desorbed from the desorption tower 14 is pumped into the lean-rich liquid heat exchanger 13 from the first desorption tower outlet 14B1 and the second lean-rich liquid heat exchanger inlet 13a2 through the lean liquid pump 15, and performs the aforementioned first heat exchange with the rich liquid entering through the first lean-rich liquid heat exchanger inlet 13a1, so that the lean liquid releases heat and is cooled;
the lean liquid which completes the first heat exchange enters the lean liquid cooler 16 through the lean-rich liquid heat exchanger second outlet 13B2 and the lean liquid cooler first inlet 16a1, and performs the second heat exchange with the desalted water entering through the lean liquid cooler second inlet 16a2, the lean liquid releases heat and is cooled down again, and the cooled lean liquid enters the absorption tower 11 through the lean liquid cooler second outlet 16B2 and the absorption tower second inlet 11a2 to be used as the absorbent;
the desalted water entering through the second inlet 16A2 of the lean liquid cooler absorbs heat and is heated, and the desalted water after absorbing heat and being heated enters the coal-fired steam injection boiler system 17 through the first outlet 16B1 of the lean liquid cooler to be used as make-up water of the coal-fired steam injection boiler system 17;
make-up water (demineralized water) is turned into high-temperature high-pressure steam under the influence of the steam-injection boiler system 17 of coal-fired, a part of high-temperature high-pressure steam is introduced into turbo generator 18, high-temperature high-pressure steam is turned into electric energy and low-temperature low-pressure steam in turbo generator 18, turbo generator electricity generation interface 18C of turbo generator 18 connects rich liquid pump 12 and barren liquid pump 15 electrically, in order to provide the electric energy to rich liquid pump 12 and barren liquid pump 15;
the low-temperature and low-pressure steam enters the boiler 19 through the steam outlet 18B of the turbonator and the first inlet 19A1 of the boiler to carry out third heat exchange;
part of the liquid at the bottom of the desorption tower 14 (which can be lean liquid with complete desorption or semi-lean liquid with incomplete desorption) enters the boiler 19 through the desorption tower third outlet 14B3 and the boiler second inlet 19A2, and is subjected to the third heat exchange with low-temperature low-pressure steam entering the boiler 19 through the boiler first inlet 19A1, wherein the part of the liquid absorbs heat to be heated in the boiler 19 to be partially vaporized and enters the desorption tower 14 through the boiler second outlet 19B2 and the desorption tower second inlet 14A2 so as to provide steam and heat for desorption of the rich liquid in the desorption tower 14; the low-temperature and low-pressure steam in the boiler 19 releases heat and lowers the temperature to become condensed water, and the condensed water enters the coal-fired steam injection boiler system 17 through the first outlet 19B1 of the boiler to be used as make-up water of the coal-fired steam injection boiler system 17.
It should be noted that the absorption of carbon dioxide needs to be performed at a lower temperature to ensure that the absorption amount of carbon dioxide in the absorption tower 11 is maximized, and the desorption of carbon dioxide needs to be performed at a higher temperature to sufficiently desorb carbon dioxide in the desorption tower 14.
In the carbon dioxide capture system based on the power supply of the coal-fired steam injection boiler system according to the present invention, the rich solution (which is cold rich solution) discharged through the first outlet 11B1 of the absorption tower flows into the lean rich solution heat exchanger 13, and performs the first heat exchange with the lean solution (hot lean solution) flowing out through the first outlet 14B1 of the desorption tower, and the rich solution absorbs heat to be heated and then flows into the desorption tower 14 for desorption, thereby effectively utilizing the waste heat of the hot lean solution; the barren solution which completes the first heat exchange still has higher heat, the barren solution which completes the first heat exchange is subjected to second heat exchange with the desalted water flowing in through the second inlet 13A2 of the barren solution cooler 13, the barren solution is continuously cooled, the desalted water absorbs heat and is heated up, the desalted water which absorbs heat and is heated up flows into the coal-fired steam injection boiler system 17 to be used as make-up water, the waste heat of the barren solution is effectively recovered in the heat exchange process, and the desalted water which absorbs heat and is heated up reduces the coal consumption of the coal-fired steam injection boiler system 17 in the process of heating the make-up water, so that the cost of carbon dioxide capture system for capturing carbon dioxide based on power supply of the coal-fired steam injection boiler system is; in addition, the coal-fired steam injection boiler system 17 outputs high-temperature high-pressure steam to the steam turbine generator 18, the steam turbine generator 18 converts the high-temperature high-pressure steam into electric energy and low-temperature low-pressure steam, the rich liquid pump 12 and the lean liquid pump 15 are electrically connected with the power generation interface 18C of the steam turbine generator, and the electric energy generated by the steam turbine generator 18 can be used for supplying power to the rich liquid pump 12 and the lean liquid pump 15, so that the electric energy additionally consumed by the rich liquid pump 12 and the lean liquid pump 15 in the process of capturing carbon dioxide is saved, and; moreover, the generated low-temperature and low-pressure steam is directly introduced into the boiler 19 and exchanges heat with the liquid entering through the second inlet 19a2 of the boiler in the boiler 19, and it should be noted that the low-temperature and low-pressure steam still has a very high temperature, and the low-temperature and low-pressure steam directly flows into the boiler 19 to be used as steam, so that the low-temperature and low-pressure steam generated by the steam turbine generator 18 is effectively recycled, energy consumption for additionally providing steam to the boiler 19 is avoided, and the capturing cost is saved; in addition, the low-temperature and low-pressure steam is changed into condensed water after releasing heat and reducing the temperature in the boiler 19, the condensed water is directly injected into the coal-fired steam injection boiler system 17 to be used as make-up water, waste water (condensed water) is effectively recycled and utilized, meanwhile, the make-up water is required to be heated and converted into steam in the coal-fired steam injection boiler system 17, the condensed water has higher temperature compared with the ordinary boiler make-up water, the coal consumption in the process that the condensed water with higher temperature is converted into steam in the coal-fired steam injection boiler system 17 is less than that of the ordinary make-up water, therefore, the recycling of the condensed water also reduces the energy consumption of the coal-fired steam injection boiler system 17, and the cost is saved.
The coal-fired steam injection boiler system 17 includes a boiler deaerator 171, a boiler drum 172, and a steam injection boiler body 173.
The boiler deaerator 171 includes: a first boiler deaerator inlet 171A1 communicating with the lean liquid cooler first outlet 16B 1; boiler deaerator outlet 171B.
The boiler drum 172 includes: a first boiler drum inlet 172A1 communicating with a boiler deaerator outlet 171B; boiler drum outlet 172B.
The steam injection boiler body 173 includes: an inlet 173A of the steam injection boiler body is communicated with an outlet 172B of the boiler drum; the first outlet 173B1 of the steam injection boiler body is communicated with the steam inlet 18A of the steam turbine generator; the steam injection boiler body second outlet 173B 2.
The desalted water entering through the second inlet 16a2 of the lean liquid cooler absorbs heat and heats up after the second heat exchange, the desalted water absorbing heat and heating up enters the boiler deaerator 171 for deaerating treatment through the first outlet 16B1 of the lean liquid cooler and the first inlet 171a1 of the boiler deaerator, and the deaerated desalted water enters the boiler drum 172 through the outlet 171B of the boiler deaerator and the first inlet 172a1 of the boiler drum and is vaporized into steam; steam enters the steam injection boiler body 173 through the boiler drum outlet 172B and the steam injection boiler body inlet 173A, the steam is heated in the steam injection boiler body 173 to become high-temperature high-pressure steam, and a part of the high-temperature high-pressure steam enters the steam turbine generator 18 through the steam injection boiler body first outlet 173B1 and the steam turbine generator steam inlet 18A to provide the steam for the steam turbine generator 18; another part of the high temperature and high pressure steam flows to the outside through the second outlet 173B2 of the steam injection boiler body. The deoxidized water is used to prevent oxygen corrosion of the boiler and to prolong the service life of the steam injection boiler 173. It should be noted that the high-temperature and high-pressure steam flowing into the outside refers to flowing into an oil and gas field for use.
As described above, the desalted water (cooling water) entering through the second inlet 16a2 of the lean water cooler cools the lean water entering through the first inlet 16a1 of the lean water cooler, and the desalted water absorbs heat and increases temperature, and the desalted water absorbing heat and increasing temperature flows into the coal-fired steam injection boiler system 17 to be used as the make-up water, so that the waste heat of the lean water is effectively recovered, the coal consumption of the coal-fired steam injection boiler system 17 for heating the make-up water to be converted into the steam process is reduced, the waste of the desalted water used as the coolant is avoided, and the collection cost is reduced.
The boiler deaerator 171 further includes: the boiler deaerator second inlet 171a 2.
The carbon dioxide capture system based on power supply of the coal-fired steam injection boiler system further comprises a regeneration gas cooler 20, a compressor 21, and a compressed gas cooler 22.
The regeneration gas cooler 20 includes: a first inlet 20A1 of the regeneration gas cooler, which is communicated with a second outlet 14B2 of the desorption tower; a second inlet 20A2 for the regeneration gas cooler for the external desalted water; the first outlet 20B1 of the regeneration gas cooler is communicated with the second inlet 171A2 of the boiler deaerator; a second outlet 20B2 of the regeneration gas cooler.
The compressor 21 includes: a compressor inlet 21A in communication with the second outlet 20B2 of the regeneration gas cooler; a compressor outlet 21B.
Wherein the carbon dioxide discharged through the second outlet 14B2 of the desorption tower enters the regeneration gas cooler 20 through the first inlet 20A1 of the regeneration gas cooler, and is subjected to a fourth heat exchange with the desalted water entering through the second inlet 20A2 of the regeneration gas cooler,
the carbon dioxide is subjected to heat release and temperature reduction and then enters the compressor 21 through the second outlet 20B2 of the regeneration gas cooler and the inlet 21A of the compressor, the carbon dioxide is compressed and pressurized by the compressor 21, the pressurized carbon dioxide is subjected to temperature and pressure rise and then enters the compressed gas cooler 22 through the outlet 21B of the compressor and the first inlet 22A1 of the compressed gas cooler for fifth heat exchange, the carbon dioxide is subjected to heat release and temperature reduction again and then is discharged through the first outlet 22B1 of the compressed gas cooler;
the desalted water entering through the second inlet 20a2 of the regeneration gas cooler and the carbon dioxide entering through the first inlet 20a1 of the regeneration gas cooler are subjected to the fourth heat exchange, the desalted water absorbs heat and is heated up, then enters the boiler deaerator 171 through the first outlet 20B1 of the regeneration gas cooler and the second inlet 171a2 of the boiler deaerator for deaerating, and the deaerated desalted water enters the boiler drum 172 through the outlet 171B of the boiler deaerator and the inlet of the boiler drum 172 to be used as make-up water;
the desalted water entering through the second inlet 22a2 of the compressed air cooler is subjected to the aforementioned fifth heat exchange with the carbon dioxide entering through the first inlet 22a1 of the compressed air cooler, the desalted water absorbs heat and is heated up, then enters the boiler deaerator 171 through the second outlet 22B2 of the compressed air cooler and the second inlet 171a2 of the boiler deaerator for deaerating, and the deaerated desalted water enters the boiler drum 172 through the outlet 171B of the boiler deaerator and the inlet of the boiler drum 172 to be used as make-up water.
In the carbon dioxide capture system based on power supply of the coal-fired steam injection boiler system, carbon dioxide discharged from the second outlet 14B2 of the desorption tower has high heat, the high-heat carbon dioxide is cooled by desalted water entering through the second inlet 20A2 of the regeneration gas cooler, then the desalted water absorbing heat and raising temperature enters the boiler system to be used as make-up water, and the desalted water absorbing heat and raising temperature has higher heat compared with the common make-up water of the coal-fired steam injection boiler system 17, so that the coal consumption required by the process of converting the desalted water into steam in the coal-fired steam injection boiler system 17 is greatly reduced, the coal consumption required by the coal-fired steam injection boiler system 17 for heating the make-up water is reduced, meanwhile, waste heat carried by the carbon dioxide is effectively recovered, and the energy loss is reduced; the carbon dioxide pressurized in the compressor 21 has high temperature and high pressure, the carbon dioxide with high temperature and high pressure is cooled again in the compressed gas cooler 22, the desalted water entering through the second inlet 22a2 of the compressed gas cooler absorbs heat and is heated, and then the desalted water absorbing heat and heating enters the coal-fired steam injection boiler system 17 to be used as make-up water. The carbon dioxide having completed the fourth heat exchange and the fifth heat exchange flows into the carbon dioxide transfer pipe of the outside to be further processed.
In one embodiment, the turbine generator power generation interface 18C of the turbine generator 18 is also electrically connected to the compressor 21 to provide power to the compressor 21. The turbo generator 18 supplies power to the compressor 21, so that the compressor 21 is prevented from needing extra electric energy to operate, the electric energy generated by the turbo generator 18 is effectively utilized, and the trapping cost is reduced.
In an embodiment, the boiler drum 172 further comprises a boiler drum second inlet 172a2, the boiler drum second inlet 172a2 being in communication with the boiler first outlet 19B 1; wherein the condensed water discharged via the boiler first outlet 19B1 enters the boiler drum 172 through the boiler drum second inlet 172a2 for use as make-up water for the boiler drum 172. The condensate is originally derived from high-temperature and high-pressure steam released by the coal-fired boiler 173, so that the condensate can be directly introduced into the boiler drum 172 without deoxidation treatment to be used as make-up water again, the condensate has heat and is directly introduced into the boiler drum 172, the coal consumption required by the conversion of the condensate into steam can be reduced, and meanwhile, the condensate is effectively recycled, and the loss is reduced.
Coal fired boiler's carbon dioxide capture system still includes draught fan 23, and draught fan 23 includes: an inlet 23A of the induced draft fan is used for external flue gas to enter; an outlet 23B of the induced draft fan is communicated with a first inlet 11A1 of the absorption tower; wherein, outside flue gas enters into draught fan 23 through draught fan entry 23A, then enters into absorption tower 11 through draught fan export 23B, the first entry 11A1 of absorption tower.
The turbine generator power generation interface 18C of the turbine generator 18 is also electrically connected to the induced draft fan 23 to supply power to the induced draft fan 23. The turbonator 18 supplies power to the induced draft fan 23, so that the induced draft fan 23 is prevented from needing extra electric energy to operate, the electric energy generated by the turbonator 18 is effectively utilized, and the trapping cost is reduced.
In one embodiment, the induced draft fan inlet 23A is connected to the coal-fired steam injection boiler system 17, so that the flue gas generated by the coal-fired steam injection boiler system 17 enters the absorption tower 11 through the induced draft fan 23 for capturing carbon dioxide. The design effectively treats the flue gas generated by the coal-fired steam injection boiler system, and reduces the emission of carbon dioxide.
Claims (8)
1. A carbon dioxide capture system based on power supply of a coal-fired steam injection boiler system is characterized by comprising an absorption tower (11), a rich liquor pump (12), a lean and rich liquor heat exchanger (13), a desorption tower (14), a lean liquor pump (15), a lean liquor cooler (16), a coal-fired steam injection boiler system (17), a turbine generator (18) and a boiler (19);
the absorption tower (11) comprises:
a first inlet (11A1) of the absorption tower, which is positioned at the lower part of the absorption tower (11) and is used for flue gas to enter;
a second inlet (11A2) of the absorption column, which is located at the upper part of the absorption column (11);
a first outlet (11B1) of the absorption column, which is positioned at the bottom of the absorption column (11);
a second outlet (11B2) of the absorption column, which is positioned at the top of the absorption column (11);
the lean-rich liquid heat exchanger (13) includes:
a lean-rich liquor heat exchanger first inlet (13a 1);
a lean-rich liquor heat exchanger second inlet (13a 2);
a lean-rich liquor heat exchanger first outlet (13B 1);
a lean-rich liquor heat exchanger second outlet (13B 2);
one side of the rich liquid pump (12) is communicated with a first outlet (11B1) of the absorption tower, and the other side is communicated with a first inlet (13A1) of the lean-rich liquid heat exchanger;
the desorption tower (14) comprises:
a first inlet (14A1) of the desorption tower, which is positioned at the upper part of the desorption tower (14) and is communicated with a first outlet (13B1) of the lean-rich liquid heat exchanger;
a desorber second inlet (14a2) located at the bottom of the desorber (14);
a desorber first outlet (14B1) located at the bottom of the desorber (14);
a desorber second outlet (14B2) located at a top of the desorber (14);
a third outlet (14B3) of the desorption tower, which is positioned at the lower part of the desorption tower (14);
one side of the lean liquid pump (15) is communicated with a first outlet (14B1) of the desorption tower, and the other side is communicated with a second inlet (13A2) of the lean-rich liquid heat exchanger;
the lean liquid cooler (16) includes:
a lean liquid cooler first inlet (16A1) in communication with a lean-rich liquid heat exchanger second outlet (13B 2);
a lean liquid cooler second inlet (16A2) for entry of external demineralized water;
a lean liquid cooler first outlet (16B1) in communication with the coal fired steam injection boiler system (17);
a lean liquid cooler second outlet (16B2) in communication with the absorber second inlet (11A 2);
a steam turbine generator (18) comprising:
a steam inlet (18A) of the steam turbine generator is communicated with the coal-fired steam injection boiler system (17);
a turbogenerator steam outlet (18B);
a power generation interface (18C) of the turbonator, which is electrically connected with the rich liquid pump (12) and the barren liquid pump (15) respectively;
boiler (19) comprising:
a boiler first inlet (19A1) communicated with a steam outlet (18B) of the turbonator;
a boiler second inlet (19A2) communicated with the desorption tower third outlet (14B 3);
a boiler first outlet (19B1) communicated with the coal-fired steam injection boiler system (17);
a boiler second outlet (19B2) in communication with the desorber second inlet (14A 2);
the flue gas enters the absorption tower (11) through the first inlet (11A1) of the absorption tower and moves from bottom to top, the absorbent enters the absorption tower (11) through the second inlet (11A2) of the absorption tower and sprays downwards, the absorbent spraying downwards contacts with the flue gas in a countercurrent mode, so that the absorbent absorbs carbon dioxide in the flue gas to become rich liquid, the rich liquid settles downwards, and the flue gas without the carbon dioxide continues to move upwards and is discharged through the second outlet (11B2) of the absorption tower;
the rich liquid is pumped into the lean-rich liquid heat exchanger (13) from a first outlet (11B1) of the absorption tower and a first inlet (13A1) of the lean-rich liquid heat exchanger through a rich liquid pump (12) to carry out first heat exchange, and the rich liquid absorbs heat and is heated;
the rich liquid which completes the first heat exchange enters a desorption tower (14) through a lean rich liquid heat exchanger first outlet (13B1) and a desorption tower first inlet (14A1), the rich liquid is heated and desorbed in the desorption tower (14) and is decomposed into lean liquid and carbon dioxide, the lean liquid is settled downwards in the desorption tower (14), and the carbon dioxide moves upwards and is discharged through a desorption tower second outlet (14B 2);
the lean solution desorbed from the desorption tower (14) is pumped into the lean-rich solution heat exchanger (13) from a first desorption tower outlet (14B1) and a second lean-rich solution heat exchanger inlet (13A2) through a lean solution pump (15), and the lean solution and the rich solution entering through the first lean-rich solution heat exchanger inlet (13A1) are subjected to the first heat exchange, so that the lean solution releases heat and is cooled;
the lean liquid which completes the first heat exchange enters a lean liquid cooler (16) through a second outlet (13B2) of the lean-rich liquid heat exchanger and a first inlet (16A1) of the lean liquid cooler, and carries out second heat exchange with desalted water entering through a second inlet (16A2) of the lean liquid cooler, the lean liquid releases heat again and is cooled, and the cooled lean liquid enters an absorption tower (11) through a second outlet (16B2) of the lean liquid cooler and a second inlet (11A2) of the absorption tower to be used as the absorbent;
the desalted water entering through the second inlet (16A2) of the lean liquid cooler absorbs heat and is heated, and the desalted water after absorbing heat and heating enters the coal-fired steam injection boiler system (17) through the first outlet (16B1) of the lean liquid cooler to be used as make-up water of the coal-fired steam injection boiler system (17);
make-up water is changed into high-temperature high-pressure steam under the action of the coal-fired steam injection boiler system (17), a part of high-temperature high-pressure steam is introduced into the turbonator (18), the high-temperature high-pressure steam is converted into electric energy and low-temperature low-pressure steam in the turbonator (18), and a turbonator power generation interface (18C) of the turbonator (18) is electrically connected with the pregnant solution pump (12) and the barren solution pump (15) so as to provide electric energy for the pregnant solution pump (12) and the barren solution pump (15);
the low-temperature and low-pressure steam enters the boiler (19) through the steam outlet (18B) of the turbonator and the first inlet (19A1) of the boiler to carry out third heat exchange;
part of the liquid at the bottom of the desorption tower (14) enters the boiler (19) through the desorption tower third outlet (14B3) and the boiler second inlet (19A2) and is subjected to the aforementioned third heat exchange with low-temperature low-pressure steam entering the boiler (19) through the boiler first inlet (19A1), the part of the liquid is heated up in the boiler (19) in an endothermic manner to be partially vaporized and enters the desorption tower (14) through the boiler second outlet (19B2) and the desorption tower second inlet (14A2) to provide steam and heat for desorption of the rich liquid in the desorption tower (14); the low-temperature low-pressure steam in the boiler (19) releases heat and is cooled to be condensed water, and the condensed water enters the coal-fired steam injection boiler system (17) through a first outlet (19B1) of the boiler to be used as make-up water of the coal-fired steam injection boiler system (17).
2. The coal-fired steam injection boiler system powered carbon dioxide capture system of claim 1,
the coal-fired steam-injection boiler system (17) comprises a boiler deaerator (171), a boiler steam drum (172) and a steam-injection boiler body (173);
the boiler deaerator (171) includes:
a first inlet (171A1) of the boiler deaerator, which is communicated with a first outlet (16B1) of the lean liquid cooler;
a boiler deaerator outlet (171B);
the boiler drum (172) comprises:
a first inlet (172A1) of the boiler drum, which is communicated with an outlet (171B) of the boiler deaerator;
a boiler drum outlet (172B);
the steam injection boiler body (173) includes:
the steam injection boiler body inlet (173A) is communicated with the boiler drum outlet (172B);
the steam injection boiler body first outlet (173B1) is communicated with the steam inlet (18A) of the steam turbine generator;
a steam injection boiler body second outlet (173B 2);
the desalted water entering through the second inlet (16A2) of the lean liquid cooler absorbs heat and is heated after the second heat exchange, the desalted water subjected to heat absorption and heating enters the boiler deaerator (171) through the first outlet (16B1) of the lean liquid cooler and the first inlet (171A1) of the boiler deaerator to be subjected to deaerating treatment, and the deaerated desalted water enters the boiler steam drum (172) through the outlet (171B) of the boiler deaerator and the first inlet (172A1) of the boiler steam drum to be vaporized into steam; steam enters a steam injection boiler body (173) through a boiler drum outlet (172B) and a steam injection boiler body inlet (173A), the steam is heated in the steam injection boiler body (173) to become high-temperature high-pressure steam, and a part of the high-temperature high-pressure steam enters a steam turbine generator (18) through a steam injection boiler body first outlet (173B1) and a steam turbine generator steam inlet (18A) to provide steam for the steam turbine generator (18); another part of the high temperature and high pressure steam flows to the outside through the second outlet (173B2) of the steam injection boiler body.
3. The coal-fired steam injection boiler system powered carbon dioxide capture system of claim 2,
the boiler deaerator (171) further comprises: a boiler deaerator second inlet (171A 2);
the carbon dioxide capture system based on power supply of the coal-fired steam injection boiler system further comprises a regeneration gas cooler (20), a compressor (21) and a compressed gas cooler (22);
the regeneration gas cooler (20) comprises:
a regeneration gas cooler first inlet (20A1) in communication with the desorber second outlet (14B 2);
a second inlet (20A2) of the regeneration gas cooler for the entry of external demineralized water;
a regeneration gas cooler first outlet (20B1) in communication with a boiler deaerator second inlet (171A 2);
a regeneration gas cooler second outlet (20B 2);
the compressor (21) comprises:
a compressor inlet (21A) in communication with the regeneration gas cooler second outlet (20B 2);
a compressor outlet (21B);
the compressed gas cooler (22) includes:
a compressor cooler first inlet (22A1) in communication with the compressor outlet (21B);
a second inlet (22A2) of the compressed gas cooler for the entry of external demineralized water;
a compressed gas cooler first outlet (22B 1);
a second outlet (22B2) of the compressed gas cooler, communicating with a second inlet (171A2) of the boiler deaerator;
wherein carbon dioxide discharged via the desorber second outlet (14B2) enters the regeneration gas cooler (20) via the regeneration gas cooler first inlet (20A1) for a fourth heat exchange with demineralized water entering via the regeneration gas cooler second inlet (20A2),
the carbon dioxide is subjected to heat release temperature reduction and then enters a compressor (21) through a second outlet (20B2) of the regeneration gas cooler and a compressor inlet (21A), the carbon dioxide is compressed and pressurized by the compressor (21), the pressurized carbon dioxide enters a compressed gas cooler (22) through a compressor outlet (21B) and a first inlet (22A1) of the compressed gas cooler for fifth heat exchange, the carbon dioxide is subjected to heat release temperature reduction again and then is discharged through a first outlet (22B1) of the compressed gas cooler;
the desalted water entering through the second inlet (20A2) of the regeneration gas cooler and the carbon dioxide entering through the first inlet (20A1) of the regeneration gas cooler are subjected to the fourth heat exchange, the desalted water absorbs heat and is heated, then enters the boiler deaerator (171) through the first outlet (20B1) of the regeneration gas cooler and the second inlet (171A2) of the boiler deaerator for deaerating, and the deaerated desalted water after deaerating enters the boiler steam drum (172) through the outlet (171B) of the boiler deaerator and the inlet of the boiler steam drum (172) to be used as make-up water;
the desalted water entering through the second inlet (22A2) of the compressed air cooler and the carbon dioxide entering through the first inlet (22A1) of the compressed air cooler are subjected to the fifth heat exchange, the desalted water absorbs heat and is heated, then enters the boiler deaerator (171) through the second outlet (22B2) of the compressed air cooler and the second inlet (171A2) of the boiler deaerator for deaerating, and the deaerated desalted water after deaerating enters the boiler drum (172) through the outlet (171B) of the boiler deaerator and the inlet of the boiler drum (172) to be used as make-up water.
4. The coal-fired steam injection boiler system powered carbon dioxide capture system of claim 3,
the turbine generator power generation interface (18C) of the turbine generator (18) is also electrically connected to the compressor (21) to supply power to the compressor (21).
5. The coal-fired steam injection boiler system powered carbon dioxide capture system of claim 2,
the boiler drum (172) further comprises a boiler drum second inlet (172A2), the boiler drum second inlet (172A2) being in communication with the boiler first outlet (19B 1);
wherein the condensed water discharged via the boiler first outlet (19B1) enters the boiler drum (172) through the boiler drum second inlet (172A2) for use as make-up water for the boiler drum (172).
6. The coal-fired steam injection boiler system powered carbon dioxide capture system of claim 1,
the carbon dioxide capture system of the coal-fired boiler also comprises an induced draft fan (23),
the induced draft fan (23) includes:
an inlet (23A) of the induced draft fan, which is used for external flue gas to enter;
an outlet (23B) of the induced draft fan is communicated with a first inlet (11A1) of the absorption tower;
the outside flue gas enters the induced draft fan (23) through an induced draft fan inlet (23A), and then enters the absorption tower (11) through an induced draft fan outlet (23B) and the first absorption tower inlet (11A 1).
7. The coal-fired steam injection boiler system powered carbon dioxide capture system of claim 6,
and a turbine generator power generation interface (18C) of the turbine generator (18) is also electrically connected with the induced draft fan (23) so as to supply power to the induced draft fan (23).
8. The carbon dioxide capture system based on power supply of the coal-fired steam injection boiler system according to claim 6, wherein an inlet (23A) of the induced draft fan is communicated with the coal-fired steam injection boiler system (17) so that flue gas generated by the coal-fired steam injection boiler system (17) enters the absorption tower (11) through the induced draft fan (23) to capture carbon dioxide.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124464A (en) * | 2019-06-26 | 2019-08-16 | 中石化石油工程技术服务有限公司 | Carbon dioxide capture system based on Steam-injection Boiler Burning Pulverized Coal system power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110124464A (en) * | 2019-06-26 | 2019-08-16 | 中石化石油工程技术服务有限公司 | Carbon dioxide capture system based on Steam-injection Boiler Burning Pulverized Coal system power supply |
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Address after: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC PETROLEUM ENGINEERING JIANGHAN Corp. Address before: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC ENERGY CONSERVATION AND ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co.,Ltd. |