CN110152489A - The carbon dioxide capture system and method recycled based on steam turbine exhaust heat - Google Patents
The carbon dioxide capture system and method recycled based on steam turbine exhaust heat Download PDFInfo
- Publication number
- CN110152489A CN110152489A CN201910443539.7A CN201910443539A CN110152489A CN 110152489 A CN110152489 A CN 110152489A CN 201910443539 A CN201910443539 A CN 201910443539A CN 110152489 A CN110152489 A CN 110152489A
- Authority
- CN
- China
- Prior art keywords
- heat
- heat exchanger
- lean
- entrance
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/343—Heat recovery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/80—Organic bases or salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses the carbon dioxide capture systems and method that are recycled based on steam turbine exhaust heat；Heat pump of recovering residual heat subsystem based on the carbon dioxide capture system that steam turbine exhaust heat recycles, including collecting carbonic anhydride subsystem and based on turbine discharge；It is characterized by: the collecting carbonic anhydride subsystem includes air-introduced machine, absorption tower, rich solution pump, lean/rich liquid heat exchanger, rich solution heat exchanger, desorber, reboiler, lean pump, lean solution cooler, tower overhead gas heat exchanger and gas-liquid separator；The heat pump of recovering residual heat subsystem based on turbine discharge includes condenser, tower overhead gas heat exchanger, compressor, reboiler, rich solution heat exchanger and throttle valve；In the collecting carbonic anhydride subsystem, the absorption tower has bottom gas inlet, contains CO for what is introduced through air-introduced machine2Flue gas enters, and bottom liquid outlet is connected with rich solution pump intake；Present invention low concentration CO suitable for the flue gas of the generations such as coal-burning power plant2Trapping.
Description
Technical field
The present invention relates to carbon dioxide capture system and methods, and in particular to one kind is based on steam turbine exhaust heat recycling benefit
Carbon dioxide capture system and method.
Background technique
To meet the energy demand that society continues to develop, the burning of the fossil fuels such as great Liang Mei, natural gas results in CO2Gas
A large amount of discharges of body, bring serious greenhouse effects and climate change, cause the extensive concern of the whole mankind.Therefore it efficiently passes through
The collecting carbonic anhydride technology of Ji is very necessary.
Currently, using alkaline alcamines aqueous solution as the carbon dioxide post-combustion capture technique of chemical absorbent more at
It is ripe, start relevant demonstration project in power industry.However, realizing regeneration and the carbon dioxide of absorbent in the technique
Desorption, need to extract high-quality steam heat supply from the mesolow cylinder of boiler circuit steam turbine, energy consumption is high, also results in steam benefit
It is reduced with rate decline, power plant efficiency.According to statistics, the application of carbon dioxide capture system will make power plant's net efficiency reduce 9.5-
12.5%.Secondly as the substantive characteristics of the boiler circuit of coal fired power plant electrification technique, it is big that steam condenses releasing in condenser
The amount latent heat of vaporization is taken away by recirculated cooling water, this partial heat is often wasted since quality is lower, is discharged into ambient enviroment.
Meanwhile still thering is many places hot-fluid energy to be not implemented in carbon capture system and sufficiently recycling, thereby result in the significant wastage of thermal energy.
Therefore it studies in a kind of recovered steam system and carbon capture process flow low-quality heat and makes full use of and be of great significance.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of dioxy recycled based on steam turbine exhaust heat
Change carbon capture system and method.
In order to solve the above-mentioned technical problem, the technical scheme is that it is a kind of based on steam turbine exhaust heat recycling benefit
Carbon dioxide capture system, the heat pump subsystem including collecting carbonic anhydride subsystem and based on steam turbine exhaust heat recycling
System；It is characterized by:
The collecting carbonic anhydride subsystem includes air-introduced machine, absorption tower, rich solution pump, lean/rich liquid heat exchanger, rich solution heat exchange
Device, desorber, reboiler, lean pump, lean solution cooler, tower overhead gas heat exchanger and gas-liquid separator.
It is described based on steam turbine exhaust heat recycling heat pump subsystem include condenser, tower overhead gas heat exchanger, compressor,
Reboiler, rich solution heat exchanger and throttle valve.
In the collecting carbonic anhydride subsystem, the absorption tower has bottom gas inlet, for introducing through air-introduced machine
Contain CO2Flue gas enters, and bottom liquid outlet is connected with rich solution pump intake, and overhead-liquid entrance exports phase with lean solution cooler
Even, top gas outlet to subsequent compression system；Lean/rich liquid heat exchanger first entrance and first outlet respectively with rich solution pump
Outlet is connected with rich solution heat exchanger first entrance, and lean/rich liquid heat exchanger second entrance is connected with lean solution pump discharge；Lean/rich liquid changes
The second outlet of hot device is connected with lean solution cooler entrance；At the top of desorber respectively with rich solution heat exchanger first outlet, tower overhead gas
The first entrance of heat exchanger is connected, and desorption tower bottom first outlet is connected with lean solution pump intake；Desorb tower bottom second outlet with
The first entrance of reboiler is connected, and desorber bottom inlet is connected with reboiler first outlet；Tower overhead gas heat exchanger first outlet
It is connected with gas-liquid separator entrance, gas-liquid separator outlet at bottom is connected to the entrance of lean solution cooler；At the top of gas-liquid separator
Outlet connection CO2Compressibility.
In the heat pump of recovering residual heat subsystem based on turbine discharge, the low pressure (LP) cylinder of steam turbine is exported through blow-off line
It is connected to the steam discharge entrance of condenser, the condensation water out of condenser is connect with through hot well, and the condensed water of condenser is received by hot well
Collection, and power is provided by condensate pump, boiler is sent into after the heating of multi-stage boilers feed-water heater；The heat pump fluid of condenser
Outlet is connected with tower overhead gas heat exchanger second entrance, and tower overhead gas heat exchanger second outlet is connected with suction port of compressor, and compressor goes out
Mouth is connected with reboiler second entrance, and reboiler second outlet is connect with rich solution heat exchanger second entrance, rich solution heat exchanger second
Outlet is connected with throttling valve inlet, and throttling valve outlet is connected with the heat pump fluid entrance of condenser, forms closed loop.
Second technical solution of the invention is a kind of collecting carbonic anhydride recycled based on steam turbine exhaust heat
Method, spy are being: including the following steps:
External purified processing contains CO2Flue gas enters absorption by absorb the bottom of the tower gas access after air-introduced machine pressurizes
Tower, with the lean solution counter current contacting entered from absorption tower overhead-liquid entrance, the carbon dioxide that lean solution absorbs in flue gas becomes rich solution,
Flue gas after processed is sent to subsequent delivery pipeline by top gas outlet；Rich solution is flowed out by absorb the bottom of the tower liquid outlet,
It boosts through rich solution pump and enters lean/rich liquid heat exchanger and high temperature CO2Absorbent exchanges heat, and the high temperature recycled from lean pump is poor
The heat of liquid and heat up, heat up into working medium heat exchange in rich solution heat exchanger and heat pump of recovering residual heat subsystem, then from desorption
Top of tower enters desorber；Desorber carries out CO to rich solution2Desorption, makes rich solution become semi lean solution, and semi lean solution enters reboiler,
Continue CO under the heating of heat pump fluid2Desorption, makes semi lean solution become lean solution, lean solution and the CO desorbed2Gas is from reboiler
Desorption tower bottom is flowed back to as the heat source desorbed in desorber；Lean solution enters lean/rich liquid heat exchanger under the conveying of lean pump again,
After exchanging heat in lean/rich liquid heat exchanger with the rich solution entered through rich solution pump boosting, absorption tower is entered by lean solution cooler；Desorption
The CO desorbed in tower2Gas is output to tower overhead gas heat exchanger；CO2Gas is sent after being cooled in tower overhead gas heat exchanger to gas-liquid
Separator, the CO isolated2Gas is sent into CO2Compressibility, the liquid isolated is imported to be come poor from lean/rich liquid heat exchanger
In liquid, enter in absorption tower through lean solution cooler.
The low-pressure liquid heat pump fluid of supercooled state enters in condenser, is changed with the steam discharge from turbine low pressure cylinder
Heat, steam discharge condensation heat become condensed water, collect through hot well, condensate pump is delivered to boiler feedwater heating system；Heat pump fluid
It is vaporizated into moist steam state after heat absorption, subsequently enters the CO of tower overhead gas heat exchanger with the output at the top of desorber2Gas converting heat, into one
Moist steam state working medium after step heating enters compressor boosting, heating is high temperature and pressure steam state working medium, the high temperature and pressure steam state work
Matter heat release in reboiler is condensed into high-pressure liquid working medium；The high-pressure liquid working medium further heat exchange cooling in rich solution heat exchanger
Afterwards, the liquid phase working fluid for becoming low-pressure low-temperature enters condenser through throttle valve.
It is of the present invention based on steam turbine exhaust heat recycle carbon dioxide capture system and method it is beneficial
Effect is: the present invention using heat pump of recovering residual heat subsystem promoted thermal energy quality after for CO in reboiler2Absorbent regeneration uses,
High-quality steam heat supply is extracted so as to avoid from steam turbine mesolow cylinder, improves steam utilization and generating efficiency, simultaneously
The cooling water usage amount for cooling down finished product gas is reduced, efficiency utilization rate is high, is widely portable to the generations such as coal-burning power plant
Low concentration CO in flue gas2Trapping.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the carbon dioxide capture system recycled the present invention is based on steam turbine exhaust heat.
Fig. 2 is the structural schematic diagram of condenser 2.
Wherein: 1-- steam turbine, 2-- condenser, 3-- hot well, 4-- condensate pump 4,5-- air-introduced machine, the absorption tower 6--, 7--
Rich solution pump, the lean/rich liquid heat exchanger of 8--, 9-- rich solution heat exchanger, 10-- desorber, 11-- reboiler, 12-- lean pump, 13-- are poor
Liquid cooler, 14-- tower overhead gas heat exchanger, 15-- gas-liquid separator, 16-- compressor, 17-- throttle valve, 18-boiler feedwaters add
Hot device, 19-CO2Compressibility, 21-- condenser shell, 22-- heat pump fluid heat-exchanging tube bundle, 23-- recirculated water heat-exchanging tube bundle,
24-- steam discharge entrance, 25-- condense water out；26-- heat pump fluid entrance, 27-- recycle water inlet, and 28-- heat pump fluid exports,
29-- circulating water outlet.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1, referring to Fig. 1, a kind of carbon dioxide capture system recycled based on steam turbine exhaust heat, including
Collecting carbonic anhydride subsystem and the heat pump subsystem recycled based on steam turbine exhaust heat；
The collecting carbonic anhydride subsystem includes air-introduced machine 5, absorption tower 6, rich solution pump 7, lean/rich liquid heat exchanger 8, rich solution
Heat exchanger 9, desorber 10, reboiler 11, lean pump 12, lean solution cooler 13, tower overhead gas heat exchanger 14 and gas-liquid separator 15.
The heat pump subsystem based on steam turbine exhaust heat recycling includes condenser 2, tower overhead gas heat exchanger 14, compression
Machine 16, reboiler 11, rich solution heat exchanger 9 and throttle valve 17.
In the collecting carbonic anhydride subsystem, the absorption tower 6 has bottom gas inlet, for drawing through air-introduced machine 5
What is entered contains CO2Flue gas enters, and bottom liquid outlet is connected with 7 entrance of rich solution pump, and overhead-liquid entrance goes out with lean solution cooler 13
Mouth is connected, top gas outlet to subsequent compression system；Lean/rich 8 first entrance of liquid heat exchanger and first outlet respectively with
The outlet of rich solution pump 7 is connected with 9 first entrance of rich solution heat exchanger, and lean/rich 8 second entrance of liquid heat exchanger exports phase with lean pump 12
Even；The second outlet of lean/rich liquid heat exchanger 8 is connected with 13 entrance of lean solution cooler；10 top of desorber exchanges heat with rich solution respectively
9 first outlet of device, the first entrance of tower overhead gas heat exchanger 14 are connected, 10 bottom first outlet of desorber and 12 entrance phase of lean pump
Even；10 bottom second outlet of desorber is connected with the first entrance of reboiler 11,10 bottom inlet of desorber and reboiler 11 the
One outlet is connected；14 first outlet of tower overhead gas heat exchanger is connected with 15 entrance of gas-liquid separator, 15 outlet at bottom of gas-liquid separator
It is connected to the entrance of lean solution cooler 13；15 top exit of gas-liquid separator connects CO2Compressibility 19.
In the heat pump subsystem based on steam turbine exhaust heat recycling, the low pressure (LP) cylinder of steam turbine 1 is exported through gland steam exhauster
Road is connected to the steam discharge entrance 24 of condenser 2, and the condensation water out 25 of condenser 2 is connect with through hot well 3, the condensation of condenser 2
Water is collected by hot well 3, and provides power by condensate pump 4, is sent into boiler after the heating of multi-stage boilers feed-water heater 18；It is solidifying
The heat pump fluid outlet 28 of vapour device 2 is connected with 14 second entrance of tower overhead gas heat exchanger, 14 second outlet of tower overhead gas heat exchanger and pressure
16 entrance of contracting machine is connected, and the outlet of compressor 16 is connected with 11 second entrance of reboiler, and 11 second outlet of reboiler and rich solution exchange heat
The connection of 9 second entrance of device, 9 second outlet of rich solution heat exchanger are connected with 17 entrance of throttle valve, the outlet of throttle valve 17 and condenser
Heat pump fluid entrance 26 is connected, and forms closed loop.
In a particular embodiment, as shown in Figure 2.The condenser includes condenser shell 21, the top of condenser shell 21
Steam discharge entrance 24, bottom setting condensation water out 25 is arranged in portion；Heat pump fluid entrance is respectively set in the side of condenser shell 21
26, water inlet 2, heat pump fluid outlet 28 and circulating water outlet 29 are recycled；21 inside of condenser shell is respectively arranged heat pump above and below
Working medium heat-exchanging tube 22 and recirculated water heat-exchanging tube bundle 23；The both ends of heat pump fluid heat-exchanging tube bundle 22 respectively with heat pump fluid entrance 26
It is connected to heat pump fluid outlet 28, the both ends of recirculated water heat-exchanging tube bundle 23 connect with circulation water inlet 27 and circulating water outlet 29 respectively
It is logical.
Heat pump fluid heat-exchanging tube bundle 22 has the adjustable function of heat exchange area in the condenser, can be caught according to carbon dioxide
Institute's calorific requirement is adjusted under collecting system actual condition, recycles enough heats and uses for reboiler.
The lean solution cooler 13 is cooled down by cooling water；The compressor 16, lean pump 11, rich solution pump 7 and air-introduced machine 5
By being driven by electricity；The heat pump fluid can be the organic working medium for being suitable for high temperature refrigerant, such as R1234ze (Z), R245fa.
The lean solution is the CO after desorption2Common alcamines absorbent and Chinese patent can be used in absorbent
Anhydrous carbon-dioxide absorbent of amine modified porous silica microballoon emulsion form etc. involved in CN2018092807, desorption temperature
Degree is between 80 DEG C -120 DEG C.The rich solution, which refers to, absorbs CO2CO afterwards2Absorbent.The semi lean solution refers to the portion of desorbing
Divide CO2Rich solution.
The rich solution heat exchanger 9 is not limited to heating sub-thread rich solution system, may include the richness for heating two strands or two strands or more
Liquid separate system.
The also settable heat pump fluid flow regulator of pipeline between the throttle valve 17 and condenser 2.
Embodiment 2, a kind of collecting carbonic anhydride method recycled based on steam turbine exhaust heat, including walk as follows
Rapid: external purified processing contains CO2Flue gas enters absorption tower 6 by 6 bottom gas inlet of absorption tower after the pressurization of air-introduced machine 5,
With the lean solution counter current contacting entered from absorption tower overhead-liquid entrance, the carbon dioxide that lean solution absorbs in flue gas becomes rich solution, quilt
Treated flue gas is sent to subsequent delivery pipeline by top gas outlet；Rich solution is flowed out by absorb the bottom of the tower liquid outlet, warp
The boosting of rich solution pump 7 enters lean/rich liquid heat exchanger 8 and high temperature CO2Absorbent exchanges heat, and recycles the high temperature from lean pump 12
The heat of lean solution and heat up, heat up into working medium heat exchange in rich solution heat exchanger 9 and heat pump of recovering residual heat subsystem, then from solution
It inhales and enters desorber 10 at the top of tower 10；Desorber 10 carries out CO to rich solution2Desorption, makes rich solution become semi lean solution, and semi lean solution enters
Reboiler 11 continues CO under the heating of heat pump fluid2Desorption, makes semi lean solution become lean solution, lean solution and the CO desorbed2
Gas flows back to 10 bottom of desorber as the heat source desorbed in desorber from reboiler 11；Lean solution is again under the conveying of lean pump 12
Into lean/rich liquid heat exchanger 8, after exchanging heat in lean/rich liquid heat exchanger 8 with the rich solution entered through the boosting of rich solution pump 7, pass through lean solution
Cooler 13 enters absorption tower 6；The CO desorbed in desorber 102Gas is output to tower overhead gas heat exchanger 14；CO2Gas is in tower
The CO isolated to gas-liquid separator 15 is sent after being cooled in top gas heat exchanger 142Gas is sent into CO2Compressibility 19, is isolated
Liquid import from lean/rich liquid heat exchanger 8 and come lean solution in, through lean solution cooler 13 enter absorption tower 6 in.
The low-pressure liquid heat pump fluid of supercooled state enters in condenser 2, carries out with the steam discharge from 1 low pressure (LP) cylinder of steam turbine
Heat exchange, steam discharge condensation heat become condensed water, collect through hot well 3, condensate pump 4 is delivered to boiler feedwater heating system 18；Heat
35 DEG C or so moist steam states are vaporizated into after pump work substance heat absorption, tower overhead gas heat exchanger 14 is subsequently entered and is exported at the top of desorber 10
CO2Gas converting heat, the moist steam state working medium after further heating up enter compressor 16 boost and heat up for 110 DEG C -130 DEG C,
The high temperature and pressure steam state working medium of pressure 9--14bar.Consider that heat exchanger end is poor, the temperature of the high temperature and pressure steam state working medium should be higher than that
10 DEG C or so of 11 required temperature of reboiler, high temperature and pressure steam state working medium heat release in reboiler 11 are condensed into high-pressure liquid work
Matter；The high-pressure liquid working medium is further exchanged heat in rich solution heat exchanger 9 after cooling, becomes pressure 0.8bar or so, temperature 10
DEG C or so low-pressure low-temperature liquid phase working fluid, through throttle valve 17 enter condenser 2.
In a particular embodiment, the condenser includes condenser shell 21, and steam discharge is arranged in the top of condenser shell 21
Entrance 24, bottom setting condensation water out 25；Heat pump fluid entrance 26 is respectively set in the side of condenser shell 21, recirculated water enters
Mouth 27, heat pump fluid outlet 28 and circulating water outlet 29；21 inside of condenser shell is respectively arranged heat pump fluid heat exchanger tube above and below
Beam 22 and recirculated water heat-exchanging tube bundle 23；The both ends of heat pump fluid heat-exchanging tube bundle 22 respectively with heat pump fluid entrance 26 and heat pump fluid
28 connection of outlet, the both ends of recirculated water heat-exchanging tube bundle 23 are connected to circulation water inlet 27 and circulating water outlet 29 respectively；Such as Fig. 2 institute
Show.Turbine discharge, which enters after condenser 2, first to exchange heat with the heat pump fluid in the heat pump fluid heat-exchanging tube bundle 22 of upper layer setting, then
The recirculated water being arranged in the recirculated water heat-exchanging tube bundle 23 being arranged with lower layer exchanges heat.It therefore will significantly when carbon capture system operates normally
The quantity of circulating water for reducing supply condenser, to reduce recirculated water pump work.When carbon dioxide capture system be in it is out of service or
When being overhauled, the steam turbine exhaust heat recycling heat pump subsystem is also out of service, and the quantity of circulating water for supplying condenser is extensive
Setting value when the multiple recycling heat pump subsystem to no steam turbine exhaust heat, turbine discharge only exchange heat with recirculated water, from
And guarantee the stable operation of boiler circuit.
Condenser circulating water entrance 27 connects the circulating water outlet of cooling tower, c ondenser circulating water outlet by water circulating pump
29 are connected with the circulation water inlet of cooling tower.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to the foregoing embodiments
Invention is explained in detail, for those skilled in the art still can be to skill documented by foregoing embodiments
Art scheme is modified or equivalent replacement of some of the technical features.All within the spirits and principles of the present invention,
Any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of carbon dioxide capture system recycled based on steam turbine exhaust heat, including collecting carbonic anhydride subsystem
With the heat pump of recovering residual heat subsystem based on turbine discharge；It is characterized by:
The collecting carbonic anhydride subsystem include air-introduced machine (5), absorption tower (6), rich solution pump (7), lean/rich liquid heat exchanger (8),
Rich solution heat exchanger (9), desorber (10), reboiler (11), lean pump (12), lean solution cooler (13), tower overhead gas heat exchanger
(14) and gas-liquid separator (15)；
The heat pump of recovering residual heat subsystem based on turbine discharge includes condenser (2), tower overhead gas heat exchanger (14), compression
Machine (16), reboiler (11), rich solution heat exchanger (9) and throttle valve (17)；
In the collecting carbonic anhydride subsystem, the absorption tower (6) have bottom gas inlet, for drawing through air-introduced machine (5)
What is entered contains CO2Flue gas enters, and bottom liquid outlet is connected with rich solution pump (7) entrance, overhead-liquid entrance and lean solution cooler
(13) outlet is connected, top gas outlet to subsequent compression system；Lean/rich liquid heat exchanger (8) first entrance and first goes out
Mouth respectively with rich solution pump (7) outlet and rich solution heat exchanger (9) first entrance be connected, lean/rich liquid heat exchanger (8) second entrance with it is poor
Liquid pump (12) outlet is connected；The second outlet of lean/rich liquid heat exchanger (8) is connected with lean solution cooler (13) entrance；Desorber
(10) top is connected with rich solution heat exchanger (9) first outlet, the first entrance of tower overhead gas heat exchanger (14) respectively, desorber (10)
Bottom first outlet is connected with lean pump (12) entrance；The first entrance of desorber (10) bottom second outlet and reboiler (11)
It is connected, desorber (10) bottom inlet is connected with reboiler (11) first outlet；Tower overhead gas heat exchanger (14) first outlet and gas
Liquid/gas separator (15) entrance is connected, and gas-liquid separator (15) outlet at bottom is connected to the entrance of lean solution cooler (13)；Gas-liquid point
CO is connected from device (15) top exit2Compressibility (19)；
In the heat pump of recovering residual heat subsystem based on turbine discharge, the heat pump fluid outlet (28) of condenser (2) and tower
Top gas heat exchanger (14) second entrance is connected, and tower overhead gas heat exchanger (14) second outlet is connected with compressor (16) entrance, compression
Machine (16) outlet is connected with reboiler (11) second entrance, reboiler (11) second outlet and rich solution heat exchanger (9) second entrance
Connection, rich solution heat exchanger (9) second outlet are connected with throttle valve (17) entrance, the heat pump work of throttle valve (17) outlet and condenser
Matter entrance (26) is connected, and forms closed loop.
2. the carbon dioxide capture system according to claim 1 recycled based on steam turbine exhaust heat, feature
Be: the condenser includes condenser shell (21), and steam discharge entrance (24) are arranged in the top of condenser shell (21), and bottom is set
Set condensation water out (25)；The side of condenser shell (21) be respectively set heat pump fluid entrance (26), circulation water inlet (27),
Heat pump fluid exports (28) and circulating water outlet (29)；Condenser shell (21) is internal to be respectively arranged heat pump fluid heat exchange above and below
Restrain (22) and recirculated water heat-exchanging tube bundle (23)；The both ends of heat pump fluid heat-exchanging tube bundle (22) respectively with heat pump fluid entrance (26)
It is connected to heat pump fluid outlet (28), the both ends of recirculated water heat-exchanging tube bundle (23) go out with circulation water inlet (27) and recirculated water respectively
Mouth (29) connection.
3. a kind of collecting carbonic anhydride method recycled based on steam turbine exhaust heat, it is characterised in that: this method includes
Following steps:
External purified processing contains CO2Flue gas enters absorption by absorption tower (6) bottom gas inlet after air-introduced machine (5) pressurize
Tower (6), with the lean solution counter current contacting entered from absorption tower overhead-liquid entrance, the carbon dioxide that lean solution absorbs in flue gas becomes rich
Liquid, it is processed after flue gas by top gas outlet be sent to subsequent delivery pipeline；Rich solution is by absorb the bottom of the tower liquid outlet stream
Out, it boosts through rich solution pump (7) and enters lean/rich liquid heat exchanger (8) and high temperature CO2Absorbent exchanges heat, and recycles by lean pump
(12) and come high-temperature barren liquor heat and heat up, changed into rich solution heat exchanger (9) and working medium in heat pump of recovering residual heat subsystem
Heat and heat up, then into desorber (10) at the top of the desorber (10)；Desorber (10) carries out CO to rich solution2Desorption, makes richness
Liquid becomes semi lean solution, and semi lean solution enters reboiler (11), continues CO under the heating of heat pump fluid2Desorption, makes semi lean solution
Become lean solution, lean solution and the CO desorbed2Gas flows back to desorber (10) bottom as desorption in desorber from reboiler (11)
Heat source；Lean solution again under the conveying of lean pump (12) enter lean/rich liquid heat exchanger (8), in lean/rich liquid heat exchanger (8) with
After the rich solution heat exchange entered through rich solution pump (7) boosting, enter absorption tower (6) by lean solution cooler (13)；In desorber (10)
The CO desorbed2Gas is output to tower overhead gas heat exchanger (14)；CO2Gas in tower overhead gas heat exchanger (14) be cooled after send to
Gas-liquid separator (15), the CO isolated2Gas is sent into CO2Compressibility (19), the liquid remittance isolated are changed from lean/rich liquid
Hot device (8) and come lean solution in, through lean solution cooler (13) enter absorption tower (6) in；
The low-pressure liquid heat pump fluid of supercooled state enters in condenser (2), carries out with the steam discharge from steam turbine (1) low pressure (LP) cylinder
Heat exchange is vaporizated into moist steam state after heat pump fluid heat absorption, subsequently enters tower overhead gas heat exchanger (14) and at the top of desorber (10)
The CO of output2Gas converting heat, the moist steam state working medium after further heating up enters compressor (16) boosting, heating is high temperature and pressure
Steam state working medium, the high temperature and pressure steam state working medium are condensed into 0 liquid refrigerant of high pressure through reboiler (11) interior heat release；The high-pressure liquid work
Matter is further exchanged heat in rich solution heat exchanger (9) after cooling, becomes the liquid phase working fluid of low-pressure low-temperature, is entered through throttle valve (17) solidifying
Vapour device (2).
4. the collecting carbonic anhydride method according to claim 3 recycled based on steam turbine exhaust heat, feature
It is:
The condenser includes condenser shell (21), and steam discharge entrance (24) are arranged in the top of condenser shell (21), and bottom is set
Set condensation water out (25)；The side of condenser shell (21) be respectively set heat pump fluid entrance (26), circulation water inlet (27),
Heat pump fluid exports (28), circulating water outlet (29)；Condenser shell (21) is internal to be respectively arranged heat pump fluid heat exchanger tube above and below
Beam (22) and recirculated water heat-exchanging tube bundle (23)；The both ends of heat pump fluid heat-exchanging tube bundle (22) respectively with heat pump fluid entrance (26) and
Heat pump fluid exports (28) connection, the both ends of recirculated water heat-exchanging tube bundle (23) respectively with circulation water inlet (27) and circulating water outlet
(29) it is connected to；Turbine discharge enters the heat pump work in the heat pump fluid heat-exchanging tube bundle (22) being first arranged with upper layer after condenser 2
Matter heat exchange, then exchange heat with the recirculated water for the interior setting of recirculated water heat-exchanging tube bundle (23) that lower layer is arranged；Work as carbon dioxide capture system
In out of service or when being overhauled, the steam turbine exhaust heat recycling heat pump subsystem is also out of service, supplies condensing
The quantity of circulating water of device restores setting value when recycling heat pump subsystem to no steam turbine exhaust heat, turbine discharge and circulation
Water exchanges heat, to guarantee the stable operation of boiler circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443539.7A CN110152489B (en) | 2019-05-27 | 2019-05-27 | Carbon dioxide capture system and method based on steam turbine exhaust waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443539.7A CN110152489B (en) | 2019-05-27 | 2019-05-27 | Carbon dioxide capture system and method based on steam turbine exhaust waste heat recovery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110152489A true CN110152489A (en) | 2019-08-23 |
| CN110152489B CN110152489B (en) | 2020-09-04 |
Family
ID=67632714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910443539.7A Active CN110152489B (en) | 2019-05-27 | 2019-05-27 | Carbon dioxide capture system and method based on steam turbine exhaust waste heat recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110152489B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203073A (en) * | 2020-01-07 | 2020-05-29 | 浙江大学 | Flue gas CO2Desorption device of trapping system |
| CN112126477A (en) * | 2020-09-17 | 2020-12-25 | 安徽工业大学 | Carbon dioxide capture system and method based on blast furnace slag washing water waste heat recycling |
| CN112576325A (en) * | 2020-12-11 | 2021-03-30 | 安徽金禾实业股份有限公司 | Formaldehyde preparation technology waste heat utilization power generation facility |
| CN113877371A (en) * | 2021-11-10 | 2022-01-04 | 中国石油大学(北京) | Catalytic cracking regeneration method with zero emission of carbon dioxide |
| CN114011209A (en) * | 2021-11-05 | 2022-02-08 | 中国船舶重工集团公司第七一一研究所 | Flue gas carbon dioxide trapping and compressing process and system based on screw heat pump technology optimization |
| CN114247272A (en) * | 2021-12-28 | 2022-03-29 | 北京华源泰盟节能设备有限公司 | Energy-saving system based on carbon dioxide capture technology |
| CN114768488A (en) * | 2022-05-17 | 2022-07-22 | 山东大学 | Coal-fired unit flue gas carbon dioxide entrapment system |
| CN114788992A (en) * | 2022-03-09 | 2022-07-26 | 国家电投集团远达环保股份有限公司 | Carbon capture system and power plant boiler steam turbine system coupled with carbon capture system |
| CN114797385A (en) * | 2022-05-25 | 2022-07-29 | 光大环境科技（中国）有限公司 | Deacidifying and carbon capturing integrated system and using method thereof |
| CN115138190A (en) * | 2022-07-14 | 2022-10-04 | 南方电网电力科技股份有限公司 | System for absorbing carbon dioxide by deep utilization of flue gas waste heat through chemical absorption method |
| GB2625300A (en) * | 2022-12-13 | 2024-06-19 | Rolls Royce Plc | Improvements to energy performance in CO² capture |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6235091B1 (en) * | 1996-04-30 | 2001-05-22 | Dwain F. Spencer | Systems for selectively separating CO2 from a multi-component gaseous stream |
| CN103272467A (en) * | 2013-05-31 | 2013-09-04 | 华北电力大学 | Improved heat integration coal-fired power plant decarbonization system and method |
| CN106039960A (en) * | 2016-06-13 | 2016-10-26 | 大连理工大学 | Carbon dioxide capturing and liquefying process stepwise utilizing smoke waste heat |
| CN106247683A (en) * | 2016-10-20 | 2016-12-21 | 广东电网有限责任公司电力科学研究院 | A kind of CO2seizure system and technique |
-
2019
- 2019-05-27 CN CN201910443539.7A patent/CN110152489B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6235091B1 (en) * | 1996-04-30 | 2001-05-22 | Dwain F. Spencer | Systems for selectively separating CO2 from a multi-component gaseous stream |
| CN103272467A (en) * | 2013-05-31 | 2013-09-04 | 华北电力大学 | Improved heat integration coal-fired power plant decarbonization system and method |
| CN106039960A (en) * | 2016-06-13 | 2016-10-26 | 大连理工大学 | Carbon dioxide capturing and liquefying process stepwise utilizing smoke waste heat |
| CN106247683A (en) * | 2016-10-20 | 2016-12-21 | 广东电网有限责任公司电力科学研究院 | A kind of CO2seizure system and technique |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203073A (en) * | 2020-01-07 | 2020-05-29 | 浙江大学 | Flue gas CO2Desorption device of trapping system |
| CN112126477A (en) * | 2020-09-17 | 2020-12-25 | 安徽工业大学 | Carbon dioxide capture system and method based on blast furnace slag washing water waste heat recycling |
| CN112576325A (en) * | 2020-12-11 | 2021-03-30 | 安徽金禾实业股份有限公司 | Formaldehyde preparation technology waste heat utilization power generation facility |
| CN114011209A (en) * | 2021-11-05 | 2022-02-08 | 中国船舶重工集团公司第七一一研究所 | Flue gas carbon dioxide trapping and compressing process and system based on screw heat pump technology optimization |
| CN113877371A (en) * | 2021-11-10 | 2022-01-04 | 中国石油大学(北京) | Catalytic cracking regeneration method with zero emission of carbon dioxide |
| CN113877371B (en) * | 2021-11-10 | 2023-04-25 | 中国石油大学(北京) | Catalytic cracking regeneration method for zero emission of carbon dioxide |
| CN114247272B (en) * | 2021-12-28 | 2023-01-31 | 北京华源泰盟节能设备有限公司 | Energy-saving system based on carbon dioxide capture technology |
| CN114247272A (en) * | 2021-12-28 | 2022-03-29 | 北京华源泰盟节能设备有限公司 | Energy-saving system based on carbon dioxide capture technology |
| CN114788992A (en) * | 2022-03-09 | 2022-07-26 | 国家电投集团远达环保股份有限公司 | Carbon capture system and power plant boiler steam turbine system coupled with carbon capture system |
| CN114768488A (en) * | 2022-05-17 | 2022-07-22 | 山东大学 | Coal-fired unit flue gas carbon dioxide entrapment system |
| CN114768488B (en) * | 2022-05-17 | 2024-04-26 | 山东大学 | Coal-fired unit flue gas carbon dioxide entrapment system |
| CN114797385A (en) * | 2022-05-25 | 2022-07-29 | 光大环境科技（中国）有限公司 | Deacidifying and carbon capturing integrated system and using method thereof |
| CN115138190A (en) * | 2022-07-14 | 2022-10-04 | 南方电网电力科技股份有限公司 | System for absorbing carbon dioxide by deep utilization of flue gas waste heat through chemical absorption method |
| GB2625300A (en) * | 2022-12-13 | 2024-06-19 | Rolls Royce Plc | Improvements to energy performance in CO² capture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110152489B (en) | 2020-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110152489A (en) | The carbon dioxide capture system and method recycled based on steam turbine exhaust heat | |
| RU2456060C2 (en) | Absorbent recovery by compressed top flow bled for heating purposes | |
| RU2454269C2 (en) | Recovery of absorber by spent solution subjected to instantaneous evaporation, and heat integration | |
| CA2698906C (en) | Improved method for regeneration of absorbent | |
| CN114768488B (en) | Coal-fired unit flue gas carbon dioxide entrapment system | |
| AU2011322820B2 (en) | Heat integration in CO2 capture | |
| CN108136321A (en) | For CO2The method and apparatus of trapping | |
| CN108413637B (en) | A kind of recycling of industrial smoke waste heat and dehumidification system | |
| CN106955569B (en) | A kind of hydrate continuously traps CO in cement kiln flue gas2Method | |
| CN105909330A (en) | Flue gas waste heat recovery and flue gas processing system based on organic Rankine cycle | |
| Guo et al. | A new heat supply strategy for CO2 capture process based on the heat recovery from turbine exhaust steam in a coal-fired power plant | |
| CN114738071B (en) | Double-pressure circulation system for carbon recovery | |
| CN105749728B (en) | Method and apparatus for capturing carbon dioxide | |
| CN102052101B (en) | System for improving performance of an IGCC power plant | |
| CN101485952A (en) | System with transcritical carbon dioxide heat pump for providing heat to CCS | |
| CN205556107U (en) | Cascade utilization system of supplementary carbon dioxide entrapment of low temperature geothermal energy in utilization | |
| CN204582900U (en) | A kind of decarbonization system utilizing solar energy to assist reboiler to heat | |
| CN105258141B (en) | The indirect thermodynamic-driven removing CO of independent solar phase transformation step accumulation of heat2System | |
| CN109958485A (en) | A kind of NGCC decarburization integrated system based on second-kind absorption-type heat pump | |
| CN221156044U (en) | Carbon trapping system based on waste heat recovery of high back pressure combined cycle unit | |
| CN217233613U (en) | Double-pressure carbon recycling and circulating system | |
| CN117771922B (en) | Full flue gas carbon dioxide entrapment system | |
| CN218452040U (en) | Utilize supplementary carbon entrapment of geothermol power to carry pressure equipment to put | |
| CN114686281B (en) | Low-carbon heat recovery trapping device | |
| RU2575519C2 (en) | Heat integration at co2 capture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |