CN208711388U - The carbon dioxide recycle electricity generation system being pressurized using chemical absorbing - Google Patents
The carbon dioxide recycle electricity generation system being pressurized using chemical absorbing Download PDFInfo
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- CN208711388U CN208711388U CN201821107322.6U CN201821107322U CN208711388U CN 208711388 U CN208711388 U CN 208711388U CN 201821107322 U CN201821107322 U CN 201821107322U CN 208711388 U CN208711388 U CN 208711388U
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- carbon dioxide
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Abstract
The utility model provides a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing, system includes chemical absorbing equipment and carbon dioxide recycle equipment, the turbine exhaust of carbon dioxide recycle is absorbed by the solution in absorption tower, solution is input to regenerator by pump pressurization, high-pressure carbon dioxide is desorbed after solution heating in regenerator, high-pressure carbon dioxide is further pressurized to above-critical state, and is generated electricity by carbon dioxide cycle system.The utility model is easy, economically realizes the compression process of carbon dioxide gas, so that carbon dioxide recycle is sufficiently expanded pressure ratio, is conducive to improve the thermal efficiency using reheating, and cycle fluid flow is greatly decreased, heat exchange equipment scale down.
Description
Technical field
The utility model relates to a kind of carbon dioxide recycle electricity generation systems being pressurized using chemical absorbing, belong to new-generation
Technical field.
Background technique
Carbon dioxide has chemical property stabilization, high temperature corrosion compared with weak, easy acquisition, nontoxic, non-combustible, density is big, compression
The physical property features such as coefficient is low, specific heat is big, diffusion coefficient is high, critical pressure 7.38MPa are easy to reach in engineering, critical
Temperature is 31 DEG C, can be cooled to Near The Critical Point or liquid by the cold source in natural environment.Therefore, carbon dioxide is used as enclosed
The working medium of cycle generating system.When working medium reaches critical point or more in circulation, i.e. composition supercritical carbon dioxide recycles, and can get
The considerable thermal efficiency, and therefore become the research hotspot of current energy field.
It is limited by equipment working strength, working medium operation maximum pressure is in 30MPa grade in supercritical carbon dioxide circulation.It is logical
The low-pressure side often recycled only has 3~4 in 8MPa or so, the pressure ratio of circulation；Turbine acting section working medium is smaller than enthalpy drop, working medium flow
Greatly, and turbine classification reheating is relatively difficult, and turbine exhaust temperature is high, and regenerator heat exchange amount is very big.If further increasing pressure ratio,
Turbine exhaust pressure will be far below critical pressure, critical firstly the need of gaseous low pressure CO 2 to be compressed in compression process
Near pressure, this section of compression process wasted work is much larger than the process that high pressure is compressed to from critical pressure, at this point, under the thermal efficiency of circulation
Drop.
Therefore, how easier, economically realize carbon dioxide gas compression process, be that carbon dioxide recycle is sufficiently sharp
The critical issue for being improved the thermal efficiency with reheating, being reduced flow, reducing heat exchanger scale.
Utility model content
The technical problems to be solved in the utility model be it is how easier, economically realize carbon dioxide gas it is compressed
Journey.
In order to solve the above-mentioned technical problem, the technical solution of the utility model be to provide it is a kind of using chemical absorbing pressurization
Carbon dioxide recycle electricity generation system, it is characterised in that: including for using chemical solution as the absorption of absorbent absorbing carbon dioxide
Tower, absorption tower carbon dioxide inlet connect regenerator low temperature side outlet, absorption tower outlet connection rich solution pump inlet；Rich solution pump discharge
It is divided into two-way, is separately connected the side-entrance of poor rich liquid heat exchanger rich solution and regeneration gas rich solution heat exchanger rich solution side-entrance；Rich or poor liquid changes
Hot device rich solution side outlet and regeneration gas rich solution heat exchanger rich solution side outlet converge and connect regenerator import, the outlet of regenerator lean solution
The side-entrance of poor rich liquid heat exchanger lean solution is connected, poor rich liquid heat exchanger lean solution side outlet connects hydraulic turbine import, and hydraulic turbine goes out
Mouth connection absorption tower lean solution import；
Regenerator regeneration gas outlet connection regeneration gas rich solution heat exchanger regeneration gas side-entrance, the regeneration of regeneration gas rich solution heat exchanger
Gas side outlet connection regeneration gas co 2 heat exchanger low pressure side-entrance, the connection of regeneration gas co 2 heat exchanger low side outlets
Forecooler import, forecooler outlet connection stage compressor import, stage compressor outlet connects intercooler import, intermediate
Cooler outlet connects split-compressor import；Split-compressor outlet is divided into two-way, is separately connected reaction heat regenerator import
With regeneration gas co 2 heat exchanger high pressure side-entrance；React heat regenerator outlet and regeneration gas co 2 heat exchanger high-pressure side
Converge and connect regenerator high pressure side-entrance in outlet；
Regenerator high pressure side outlet connects the import of primary heater bringing-up section, primary heater bringing-up section outlet connection high pressure turbine
Import, high pressure turbine outlet connection primary heater reheating section import, primary heater reheating section outlet connection low pressure turbine import are low
Turbine outlet connection regenerator low pressure side-entrance is pressed, regenerator low side outlets connect absorption tower carbon dioxide inlet；Generator
It is sequentially connected with high pressure turbine, low pressure turbine.
Preferably, the chemical solution is the solution of potassium carbonate equipped with activating agent.
Preferably, the absorption tower connects reaction heat displacer, and the reaction heat in absorption tower is discharged by reaction heat displacer
And it is used.
Preferably, the regenerator connects regenerative heater, is provided needed for the reaction in regenerator as regenerative heater
Heat.
Preferably, the condensation-water drain of the regeneration gas rich solution heat exchanger connects regenerator import.
Preferably, the forecooler, intercooler condensation-water drain be all connected with absorption tower import.
Preferably, the primary heater can be designed to different structures to adapt to different heat resource forms, such as: optically focused
Type solar thermal collector, external-burning heating furnace or shell-and-tube heat exchanger.
Preferably, the stage compressor, split-compressor are using the intercooled compressor of classification；The high pressure is saturating
Flat, low pressure turbine is the turbine using classification reheating.
The use step of the above-mentioned carbon dioxide recycle electricity generation system using chemical absorbing pressurization are as follows: low pressure turbine discharge
Carbon dioxide enter absorption tower, carbon dioxide, which dissolves in the absorbent in absorption tower, forms mixed solution；The mixed solution
It is divided into two-way after rich solution pump is pressurized: the heat of the lean solution come out all the way through poor rich liquid heat exchanger absorption and regeneration tower, another way warp
The heat for the regeneration gas that regeneration gas rich solution heat exchanger absorption and regeneration tower comes out, then two-way remittance are combined into regenerator；
The lean solution of regenerator enters poor rich liquid heat exchanger release waste heat, then releases stress energy through hydraulic turbine, returns
Absorption tower；The regeneration gas of regenerator discharges waste heat through regeneration gas rich solution heat exchanger, then successively through regeneration air carbon dioxide heat exchange
Device, forecooler, then compressed through stage compressor, then cooling through intercooler, then compressed through split-compressor；
The carbon dioxide of split-compressor outlet divides two-way: entering reaction heat regenerator heating all the way, another way enters again
Angry co 2 heat exchanger heating, then two-way converges further heats up into regenerator, and it is further to enter back into primary heater
Heating, subsequently enters high pressure turbine；High pressure turbine exhaust enters primary heater reheating, enters back into low pressure turbine, high pressure turbine and
Low pressure turbine pushing generator produces electricl energy, and last low pressure turbine exhaust enters absorption tower after entering regenerator release waste heat, such as
This circulation.
Preferably, the pressure carbon dioxide into absorption tower is 0.1~0.5MPa；Absorbing reaction temperature in absorption tower is
100~150 DEG C；Pressure in regenerator is 6~8MPa；Desorption reaction temperature in regenerator is 200~250 DEG C.
Compared with prior art, the carbon dioxide recycle electricity generation system provided by the utility model using chemical absorbing pressurization has
It has the advantages that:
1, turbine exhaust pressure further decreases, to provide sufficient pressure differential range, for turbine multistage reheating for circulation
System obtains thermal efficiency promotion from reheating process and creates conditions, and the working medium flow of circulation reduces, the scale down of regenerator.
2, the solution of turbine exhaust absorbs pressurization power consumption very little, it is only necessary to and middle low-temperature heat quantity provides regenerative response heat,
The heat of absorbing reaction release still has higher grade to be suitble to multiple use.
3, the solution absorption supercharging equipment of turbine exhaust is simple, and cost is relatively low for equipment and solution, not complicated machinery, can
By property height.
Detailed description of the invention
Fig. 1 is the carbon dioxide recycle electricity generation system schematic diagram provided in this embodiment being pressurized using chemical absorbing；
Description of symbols:
The absorption tower 1-, 2- reaction heat displacer, 3- rich solution pump, 4- poor rich liquid heat exchanger, 5- regeneration gas rich solution heat exchanger, 6-
Regenerative heater, 7- regenerator, 8- hydraulic turbine, 9- react heat regenerator, 10- regeneration gas co 2 heat exchanger, 11- pre-cooling
Device, 12- stage compressor, 13- intercooler, 14- split-compressor, 15- regenerator, 16- primary heater, 17- high pressure are saturating
It is flat, 18- low pressure turbine, 19- generator.
Specific embodiment
The present invention will be further illustrated below in conjunction with specific embodiments.
Fig. 1 is the carbon dioxide recycle electricity generation system schematic diagram provided in this embodiment being pressurized using chemical absorbing, described
Using chemical absorbing pressurization carbon dioxide recycle electricity generation system include absorption tower 1, the absorbent that absorption tower 1 uses is carbonic acid
Potassium, 1 carbon dioxide inlet of absorption tower connect 15 low temperature side outlet of regenerator, the outlet of absorption tower 1 connection 3 import of rich solution pump, rich solution
3 outlet of pump is divided into two-way and is separately connected 5 rich solution side-entrance of 4 rich solution side-entrance of poor rich liquid heat exchanger and regeneration gas rich solution heat exchanger,
4 rich solution side outlet of poor rich liquid heat exchanger and 5 rich solution side outlet of regeneration gas rich solution heat exchanger converge and connect 7 import of regenerator, then
Raw 7 lean solution of tower outlet connection 4 lean solution side-entrance of poor rich liquid heat exchanger, 4 lean solution side outlet of poor rich liquid heat exchanger connect hydraulic turbine 8
Import, the outlet of hydraulic turbine 8 connection 1 lean solution import of absorption tower.7 regeneration gas of regenerator outlet connection regeneration gas rich solution heat exchanger 5
Regeneration gas side-entrance, 5 regeneration gas side outlet of regeneration gas rich solution heat exchanger connect 10 low-pressure side of regeneration gas co 2 heat exchanger into
Mouthful, 10 low side outlets of regeneration gas co 2 heat exchanger connect 11 import of forecooler, the outlet of forecooler 11 connection one stage of compression
12 import of machine, the outlet of stage compressor 12 connection 13 import of intercooler, the outlet of intercooler 13 connection split-compressor
14 imports, the outlet of split-compressor 14 are divided into two-way and are separately connected reaction 9 import of heat regenerator and regeneration air carbon dioxide heat exchange
10 high pressure side-entrance of device, the outlet of reaction heat regenerator 9 and 10 high pressure side outlet of regeneration gas co 2 heat exchanger converge and connect
15 high pressure side-entrance of regenerator, 15 high pressure side outlet of regenerator connect 16 bringing-up section import of primary heater, and primary heater 16 heats
Section outlet connection 17 import of high pressure turbine, the outlet of high pressure turbine 17 connection 16 reheating section import of primary heater, primary heater 16 is again
Hot arc outlet connection 18 import of low pressure turbine, the outlet of low pressure turbine 18 connection 15 low pressure side-entrance of regenerator, 15 low pressure of regenerator
Side outlet connects 1 carbon dioxide inlet of absorption tower.Generator 19, high pressure turbine 17, low pressure turbine 18 are sequentially connected, and three is same
Axis setting.
Absorption tower 1 connects reaction heat displacer 2, and the reaction heat in absorption tower 1 is mainly discharged by reaction heat displacer 2 and can
It is used.Regenerator 7 connects regenerative heater 6, heat needed for providing the reaction in regenerator 7 as regenerative heater 6.
The condensation-water drain of regeneration gas rich solution heat exchanger 5 connects 7 import of regenerator.Forecooler 11, intercooler 13
Condensation-water drain connects 1 import of absorption tower.
Lead between each equipment of carbon dioxide recycle electricity generation system provided in this embodiment using chemical absorbing pressurization
Piping connection controls needs according to system, can also arrange the equipment such as valve, instrument on pipeline.It may also include auxiliary in system
Facility, electrical system, control system etc..
The specific implementation step of carbon dioxide recycle electricity generation system provided in this embodiment using chemical absorbing pressurization is such as
Under:
The low pressure CO 2 that low pressure turbine 18 is vented enters absorption tower 1, and carbon dioxide dissolves in potassium carbonate absorbent solution,
Absorption process pressure is 0.2MPa, and 120 DEG C of temperature, reaction heat is mainly discharged and can be used by reaction heat displacer 2；Solution
It is pressurized to 7MPa through rich solution pump 3, is then divided into two-way: the heat of the lean solution come out all the way through 4 absorption and regeneration tower 7 of poor rich liquid heat exchanger
Amount, the heat for the regeneration gas that another way comes out through 5 absorption and regeneration tower 7 of regeneration gas rich solution heat exchanger, then two-way remittance are combined into
Regenerator 7,200 DEG C of the desorption temperature of regenerator 7 provide reaction institute's calorific requirement by regenerative heater 6；The lean solution of regenerator 7 is again
Waste heat is discharged into poor rich liquid heat exchanger 4, then releases stress energy through hydraulic turbine 8, is then return to absorption tower 1；Regenerator 7 is again
Anger discharges waste heat (condensing hot air furnace of generation enters regenerator 7) through regeneration gas rich solution heat exchanger 5, then again successively through regenerating
Air carbon dioxide heat exchanger 10, forecooler 11 are cooled to 25 DEG C, then compress through stage compressor 12, then cold through intercooler 13
But (condensing hot air furnace of generation enters absorption tower 1), then compressed through split-compressor 14, the titanium dioxide that split-compressor 14 exports
25MPa/25 DEG C of carbon power pressure contains minimal amount of water, then divides two-way: enters reaction heat regenerator 9 all the way and heats, another way
It is heated into regeneration gas co 2 heat exchanger 10, then two-way converges further heats up into regenerator 15, enters back into main add
Hot device 16 reaches a high temperature, such as: 600 DEG C, then working medium enters high pressure turbine 17, and the exhaust of high pressure turbine 17 enters primary heater 16
600 DEG C are reheated to, low pressure turbine 18 is entered back into, high pressure turbine 17 and 18 pushing generator 19 of low pressure turbine produce electricl energy, finally
The exhaust of low pressure turbine 18 enters after regenerator 15 discharges waste heat and enters absorption tower 1.
Estimate to obtain the generating efficiency of carbon dioxide cycle system by above-mentioned parameter up to 50% or more, further using anti-
The cogeneration for answering hot displacer 2 to be discharged, can be such that generating efficiency improves to 55% or more.
The utility model is easy, economically realizes the compression process of carbon dioxide gas, keeps carbon dioxide recycle abundant
Expand pressure ratio, is conducive to improve the thermal efficiency using reheating, and cycle fluid flow is greatly decreased, the contracting of heat exchange equipment scale
It is small.
The above, the only preferred embodiment of the utility model, it is in any form and substantive not to the utility model
On limitation, it is noted that for those skilled in the art, in the premise for not departing from the utility model method
Under, several improvement and supplement can be also made, these are improved and supplement also should be regarded as the protection scope of the utility model.It is all ripe
Professional and technical personnel is known, in the case where not departing from the spirit and scope of the utility model, when using disclosed above
Technology contents and the equivalent variations of a little variation, modification and evolution made, be the equivalent embodiment of the utility model；Together
When, all substantial technologicals according to the utility model to the variation, modification and evolution of any equivalent variations made by above-described embodiment,
In the range of still falling within the technical solution of the utility model.
Claims (10)
1. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing, it is characterised in that: including for chemical solution
Liquid is the absorption tower (1) of absorbent absorbing carbon dioxide, and (1) carbon dioxide inlet connection regenerator (15) low temperature side in absorption tower goes out
Mouthful, absorption tower (1) outlet connection rich solution pump (3) import；Rich solution pump (3) outlet is divided into two-way, is separately connected poor rich liquid heat exchanger
(4) rich solution side-entrance and regeneration gas rich solution heat exchanger (5) rich solution side-entrance；Poor rich liquid heat exchanger (4) rich solution side outlet and regeneration
Gas rich solution heat exchanger (5) rich solution side outlet converges and connects regenerator (7) import, and the outlet of regenerator (7) lean solution connects rich or poor liquid
Heat exchanger (4) lean solution side-entrance, poor rich liquid heat exchanger (4) lean solution side outlet connect hydraulic turbine (8) import, hydraulic turbine (8)
Outlet connection absorption tower (1) lean solution import；
Regenerator (7) regeneration gas outlet connection regeneration gas rich solution heat exchanger (5) regeneration gas side-entrance, regeneration gas rich solution heat exchanger
(5) regeneration gas side outlet connects regeneration gas co 2 heat exchanger (10) low pressure side-entrance, regeneration gas co 2 heat exchanger
(10) low side outlets connect forecooler (11) import, forecooler (11) outlet connection stage compressor (12) import, level-one pressure
Contracting machine (12) outlet connection intercooler (13) import, intercooler (13) outlet connection split-compressor (14) import；
Split-compressor (14) outlet is divided into two-way, is separately connected reaction heat regenerator (9) import and regeneration gas co 2 heat exchanger
(10) high pressure side-entrance；Reaction heat regenerator (9) outlet and regeneration gas co 2 heat exchanger (10) high pressure side outlet converge simultaneously
Connect regenerator (15) high pressure side-entrance；
Regenerator (15) high pressure side outlet connects primary heater (16) bringing-up section import, primary heater (16) bringing-up section outlet connection
High pressure turbine (17) import, high pressure turbine (17) outlet connection primary heater (16) reheating section import, primary heater (16) reheating
Section outlet connection low pressure turbine (18) import, low pressure turbine (18) outlet connection regenerator (15) low pressure side-entrance, regenerator
(15) low side outlets connect absorption tower (1) carbon dioxide inlet；Generator (19) and high pressure turbine (17), low pressure turbine (18)
It is sequentially connected.
2. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
The chemical solution is the solution of potassium carbonate equipped with activating agent.
3. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
It further include the reaction heat displacer (2) for absorption tower (1) interior reaction heat to be discharged, absorption tower (1) the connection reaction heat discharge
Device (2).
4. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
It further include the regenerative heater (6) for heat needed for providing the reaction in regenerator (7), regenerator (7) connection is again
Raw heater (6).
5. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
The condensation-water drain of the regeneration gas rich solution heat exchanger (5) connects regenerator (7) import.
6. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
The condensation-water drain of the forecooler (11) is all connected with absorption tower (1) import.
7. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
The condensation-water drain of the intercooler (13) is all connected with absorption tower (1) import.
8. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
The primary heater (16) is focus solar collector, external-burning heating furnace or shell-and-tube heat exchanger.
9. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, it is characterised in that:
The stage compressor (12), split-compressor (14) are using the intercooled compressor of classification.
10. a kind of carbon dioxide recycle electricity generation system being pressurized using chemical absorbing as described in claim 1, feature are existed
In: the high pressure turbine (17), low pressure turbine (18) they are the turbine using classification reheating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107322.6U CN208711388U (en) | 2018-07-12 | 2018-07-12 | The carbon dioxide recycle electricity generation system being pressurized using chemical absorbing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107322.6U CN208711388U (en) | 2018-07-12 | 2018-07-12 | The carbon dioxide recycle electricity generation system being pressurized using chemical absorbing |
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| CN208711388U true CN208711388U (en) | 2019-04-09 |
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| CN201821107322.6U Withdrawn - After Issue CN208711388U (en) | 2018-07-12 | 2018-07-12 | The carbon dioxide recycle electricity generation system being pressurized using chemical absorbing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108771950A (en) * | 2018-07-12 | 2018-11-09 | 上海发电设备成套设计研究院有限责任公司 | A kind of carbon dioxide recycle electricity generation system and method being pressurized using chemical absorbing |
-
2018
- 2018-07-12 CN CN201821107322.6U patent/CN208711388U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108771950A (en) * | 2018-07-12 | 2018-11-09 | 上海发电设备成套设计研究院有限责任公司 | A kind of carbon dioxide recycle electricity generation system and method being pressurized using chemical absorbing |
| CN108771950B (en) * | 2018-07-12 | 2023-10-17 | 上海发电设备成套设计研究院有限责任公司 | Carbon dioxide circulating power generation system and method adopting chemical absorption pressurization |
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