CN115138181A - Energy-saving and water-saving carbon capture device and method - Google Patents

Energy-saving and water-saving carbon capture device and method Download PDF

Info

Publication number
CN115138181A
CN115138181A CN202210609348.5A CN202210609348A CN115138181A CN 115138181 A CN115138181 A CN 115138181A CN 202210609348 A CN202210609348 A CN 202210609348A CN 115138181 A CN115138181 A CN 115138181A
Authority
CN
China
Prior art keywords
tower
mea
flue gas
outlet
saving
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.)
Pending
Application number
CN202210609348.5A
Other languages
Chinese (zh)
Inventor
徐世明
安航
刘家男
周贤
李应祥
彭烁
姚忠凯
蔡浩飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaneng Clean Energy Research Institute
Huaneng Yingkou Thermal Power Co Ltd
Original Assignee
Huaneng Clean Energy Research Institute
Huaneng Yingkou Thermal Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huaneng Clean Energy Research Institute, Huaneng Yingkou Thermal Power Co Ltd filed Critical Huaneng Clean Energy Research Institute
Priority to CN202210609348.5A priority Critical patent/CN115138181A/en
Publication of CN115138181A publication Critical patent/CN115138181A/en
Pending legal-status Critical Current

Links

Images

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
    • B01D53/14—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 by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/007—Energy recuperation; Heat pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/06—Flash distillation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
    • B01D5/009—Collecting, removing and/or treatment of the condensate
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1431—Pretreatment by other processes
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1475—Removing carbon dioxide
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • 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
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/204—Amines
    • B01D2252/20478—Alkanolamines
    • B01D2252/20484—Alkanolamines with one hydroxyl group
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides an energy-saving and water-saving carbon capture device and a method, which comprise a desulfurization unit, a first heat exchange unit, an absorption tower and a desorption tower, wherein the desulfurization unit is provided with a flue gas inlet and a flue gas outlet, and the flue gas outlet is connected with the flue gas inlet arranged on the absorption tower; an MEA lean solution inlet is formed in the absorption tower and connected with the desorption towerAn MEA barren solution outlet is formed; an MEA rich liquid outlet formed in the absorption tower is connected with an MEA rich liquid inlet formed in the desorption tower through a heat exchange unit; a steam outlet formed in the desulfurization unit is connected with the heat exchange unit; a carbon dioxide outlet is formed in the desorption tower; the invention can improve CO 2 The absorption rate is equivalent to the reduction of the trapping energy consumption; meanwhile, the whole water consumption of the system can be effectively reduced.

Description

Energy-saving and water-saving carbon capture device and method
Technical Field
The invention belongs to the field of environment, and particularly relates to an energy-saving and water-saving carbon capture device and method.
Background
Climate warming has attracted a close global attention, CO 2 Is one of the most prominent greenhouse gases in the atmosphere. As a key industry for carbon dioxide emission, the flue gas tail gas of each thermal power plant in the power industry contains a large amount of carbon dioxide, and the carbon dioxide is directly discharged to the atmosphere in the current process flow. Along with the establishment of the national carbon emission right trading market, the carbon emission is comprehensively and directly related to the economic benefits of enterprises, and CO is captured 2 The demand of (2) is gradually coming up.
The MEA monoethanolamine method is a common method for capturing CO2, and realizes regeneration circulation through the absorption and desorption of MEA, but a high-temperature heat source is required in the regeneration process, and a steam turbine of a power plant is generally adopted for steam extraction, so that the overall energy consumption of the technology is high. Meanwhile, the flue gas temperature at the outlet of the wet desulphurization tower of the coal-fired power plant is higher than the requirement of the MEA (membrane electrode assembly) process on the flue gas temperature, and the CO2 absorption rate is low.
For a cogeneration unit, recovering the waste heat in the system is one of the best ways to increase the heating capacity without enlarging the unit size. At present, the flue gas is generally discharged after being cooled to 50-60 ℃ by adopting a water spraying method in a power plant, and the heat in the flue gas is not recovered, so that the energy waste is caused.
CN 109454620A discloses a carbon capture and waste heat recovery coupling device, which utilizes an absorption tower and a desorption tower to capture and store CO2 in high-temperature flue gas discharged by industry and carries out certain waste heat recovery. But the flue gas temperature of the absorption tower in the scheme is higher, the CO2 absorption rate is low, and the water-saving effect is not achieved.
Disclosure of Invention
The invention aims to provide an energy-saving and water-saving carbon capture device and method, which solve the problems of high flue gas temperature and CO at the inlet of an absorption tower in the prior art 2 The absorption rate is low, and meanwhile, in the prior art, only energy conservation is considered, and water conservation of a system is not considered.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides an energy-saving and water-saving carbon capture device which comprises a desulfurization unit, a first heat exchange unit, an absorption tower and a desorption tower, wherein the desulfurization unit is provided with a flue gas inlet and a flue gas outlet, and the flue gas outlet is connected with the flue gas inlet arranged on the absorption tower;
an MEA lean solution inlet is formed in the absorption tower and connected with an MEA lean solution outlet formed in the desorption tower;
an MEA rich liquid outlet formed in the absorption tower is connected with an MEA rich liquid inlet formed in the desorption tower through a heat exchange unit;
a steam outlet formed in the desulfurization unit is connected with the heat exchange unit;
and a carbon dioxide outlet is formed in the desorption tower.
Preferably, the desulfurization unit comprises a desulfurization tower and a flash tank, wherein a flue gas inlet and a flue gas outlet are formed in the desulfurization tower, and the flue gas outlet is connected with a flue gas inlet formed in the absorption tower; a slurry outlet formed in the desulfurizing tower is connected with a slurry inlet formed in the flash tank; a slurry outlet arranged on the flash tank is connected with a slurry inlet on the desulfurizing tower; and a steam outlet formed in the flash tank is connected with the first heat exchange unit.
Preferably, a second heat exchange unit is arranged between the slurry outlet formed in the desulfurizing tower and the slurry inlet formed in the flash tank.
Preferably, the second heat exchange unit is a heat exchanger.
Preferably, the heat exchange unit comprises an absorption heat pump and a lean-rich liquid heat exchanger, wherein a steam outlet of the desulfurization unit is connected with a steam inlet on the absorption heat pump; a first condensate outlet formed in the absorption heat pump is connected with a condensate inlet formed in the desorption tower;
an MEA rich liquid outlet formed in the absorption tower is connected with an MEA rich liquid inlet formed in the desorption tower through a lean-rich liquid heat exchanger and an absorption heat pump in sequence;
an MEA barren solution outlet arranged on the desorption tower is connected with an MEA barren solution inlet arranged on the absorption tower through a barren-rich solution heat exchanger and a heat exchanger in sequence.
Preferably, the absorption heat pump is provided with a driving steam inlet and a second condensed water outlet, and the second condensed water outlet is connected with a water purifying tank.
An energy-saving and water-saving carbon capture method comprises the following steps:
the flue gas enters a desulfurization unit to carry out slurry flash evaporation to obtain flash evaporation steam, low-temperature desulfurization slurry and primary saturated wet flue gas;
the primary saturated wet flue gas enters an absorption tower to be in countercurrent contact with MEA lean solution, carbon dioxide in the low-temperature flue gas is absorbed, and the flue gas after the carbon dioxide is absorbed is discharged;
the MEA rich solution at the bottom of the absorption tower exchanges heat with the flash steam through the first heat exchange unit to become high-temperature rich solution, and the high-temperature rich solution enters the desorption tower to be desorbed.
Preferably, the flash steam generated by the desulfurization unit enters an absorption heat pump to provide heat for the MEA rich solution discharged from the bottom of the absorption tower, so that the MEA rich solution forms a high-temperature rich solution;
the high-temperature rich solution enters a desorption tower to desorb carbon dioxide; and forming an MEA barren solution, wherein the MEA barren solution is cooled through a barren-rich solution heat exchanger and a heat exchanger, and then enters the absorption tower for circulation.
Compared with the prior art, the invention has the beneficial effects that:
according to the energy-saving and water-saving carbon capture device and method provided by the invention, the temperature of the desulfurization slurry is reduced through flash evaporation of the desulfurization slurry, so that the temperature of the flue gas discharged by the desulfurization tower is reduced, and the CO in the flue gas in the absorption tower is effectively increased 2 The absorption rate of (c). The heat is extracted from the desulfurization slurry through the flash evaporation of the desulfurization slurry, the heat in the flue gas is actually utilized, and the part of heat is used for heating the MEA rich solution after being upgraded by the absorption heat pump, so that the consumption of the power plant steam in the MEA regeneration process can be effectively reduced, and the regeneration energy consumption is reduced. The low-temperature desulfurized slurry after flash evaporation is used as a cold source to further cool the MEA rich solution and improve CO 2 The absorption rate is equivalent to the reduction of the trapping energy consumption.
Furthermore, flash steam condensate is sent to the desorption tower to be used as water supplement, and the overall water consumption of the system is effectively reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
An energy-saving and water-saving carbon capture device is characterized by comprising a desulfurization unit, a first heat exchange unit, an absorption tower 2 and a desorption tower 3, wherein the desulfurization unit is provided with a flue gas inlet and a flue gas outlet, and the flue gas outlet is connected with the flue gas inlet arranged on the absorption tower 2;
an MEA lean solution inlet is formed in the absorption tower 2 and is connected with an MEA lean solution outlet formed in the desorption tower 3;
an MEA rich liquid outlet formed in the absorption tower 2 is connected with an MEA rich liquid inlet formed in the desorption tower 3 through a heat exchange unit;
a steam outlet formed in the desulfurization unit is connected with the heat exchange unit;
and a carbon dioxide outlet is formed in the desorption tower 3.
The invention provides an energy-saving and water-saving carbon capture method, which comprises the following steps:
enabling the flue gas 8 to enter a desulfurization unit for slurry flash evaporation to obtain flash evaporation steam, low-temperature desulfurization slurry and primary saturated wet flue gas;
the primary saturated wet flue gas enters an absorption tower 3 to be in countercurrent contact with MEA lean solution, carbon dioxide in the low-temperature flue gas is absorbed, and the flue gas after the carbon dioxide is absorbed is discharged;
the MEA rich solution at the bottom of the absorption tower 3 exchanges heat with the flash steam through the first heat exchange unit to become high-temperature rich solution, and the high-temperature rich solution enters the desorption tower 4 to be desorbed.
The flash steam generated by the desulfurization unit enters an absorption heat pump to provide heat for the MEA rich solution discharged from the bottom of the absorption tower 3, so that the MEA rich solution forms a high-temperature rich solution;
the high-temperature rich solution enters a desorption tower 4 to desorb carbon dioxide; and forming an MEA lean solution, wherein the MEA lean solution is cooled through a lean-rich solution heat exchanger 7 and a heat exchanger 6, and then enters the absorption tower 3 for circulation.
As shown in figure 1, the energy-saving and water-saving carbon capture device provided by the invention comprises a desulfurizing tower 1, an absorption tower 2, a desorption tower 3, a flash tank 4, an absorption heat pump 5, a heat exchanger 6, a lean-rich liquid heat exchanger 7, flue gas 8, high-temperature desulfurization slurry 9, saturated wet flue gas 10, low-temperature desulfurization slurry 11, flash steam 12, condensed water 13, driving steam 14, condensed water 15, MEA rich liquid 16, high-temperature rich liquid 18, MEA lean liquid 19, CO-rich liquid 19 2 Gas 20 and flue gas 21, wherein:
the desulfurizing tower 1 is provided with a flue gas inlet and a slurry outlet, and the slurry outlet is connected with a slurry inlet arranged on the flash tank 4.
And a steam outlet formed in the flash tank 4 is connected with a steam inlet formed in the absorption heat pump 5.
And a slurry outlet arranged on the flash tank 4 is connected with a slurry inlet arranged on the desulfurizing tower 1 through a heat exchanger 6.
The absorption heat pump 5 is provided with a driving steam inlet and a second condensate outlet, and the second condensate outlet is connected with the water purifying tank.
The absorption heat pump 5 is provided with a first condensate outlet which is connected with a condensate inlet on the desorption tower 3.
And a flue gas outlet formed in the desulfurizing tower 1 is connected with a flue gas inlet formed in the absorption tower 2.
An MEA lean solution outlet arranged on the desorption tower 3 is connected with an MEA lean solution inlet on the absorption tower 2 through a lean-rich solution heat exchanger 7 and a heat exchanger 6 in sequence.
An MEA rich liquid outlet formed in the absorption tower 2 is connected with an MEA rich liquid inlet formed in the desorption tower 3 through a lean-rich liquid heat exchanger 7 and an absorption heat pump 5 in sequence.
And a carbon dioxide outlet is formed in the desorption tower 3.
The working process of the invention is as follows:
the flue gas 8 enters the desulfurizing tower 1 to exchange heat with low-temperature desulfurizing slurry sprayed from the top of the tower and is purified, and the flue gas is cooled and humidified; the high-temperature desulfurization slurry 9 at the bottom of the desulfurization tower 1 enters a flash tank 4, flash evaporation is carried out in a vacuum environment, flash evaporation steam 12 and low-temperature desulfurization slurry 11 are generated, and heat is transferred from the desulfurization slurry to the flash evaporation steam.
The flash steam 12 enters an absorption heat pump 5, and is upgraded by using driving steam 14, and the MEA rich solution is heated.
The driving steam is condensed into condensed water 15 in the absorption heat pump 5 and returns to the clean water tank, and the flash steam 12 is condensed into condensed water 13 and enters the desorption tower 3.
The purified saturated wet flue gas 10 enters an absorption tower 2 to be in countercurrent contact with MEA barren solution sprayed from the top of the tower, and CO in the flue gas 2 Is absorbed, CO 2 The absorbed flue gas 21 is discharged from the top of the absorption tower.
The MEA rich solution 16 is discharged from the tower bottom of the absorption tower 2, enters the absorption heat pump 5 after being heated by the lean-rich solution heat exchanger 7, is further heated to be high-temperature rich solution 18, and then enters the desorption tower 3 for desorption.
The desorbed MEA lean solution 19 is cooled by the lean-rich solution heat exchanger 7, then is further subjected to heat exchange and cooling with low-temperature desulfurization slurry in the heat exchanger 6, and then enters the absorption tower 2 for circulation.
Desorbed CO-rich 2 The gas 20 is discharged from the top of the tower and is compressed and condensed to obtain high-purity CO 2 。
The invention has the following effects:
1. the temperature of the desulfurization slurry is reduced through flash evaporation of the desulfurization slurry, so that the temperature of the flue gas discharged by the desulfurization tower is reduced, and the absorption rate of CO2 in the flue gas in the absorption tower is effectively improved.
2. The heat is extracted from the desulfurization slurry through the flash evaporation of the desulfurization slurry, the heat in the flue gas is actually utilized, and the part of heat is used for heating the MEA rich solution after being upgraded by the absorption heat pump, so that the consumption of the power plant steam in the MEA regeneration process can be effectively reduced, and the regeneration energy consumption is reduced.
3. The low-temperature desulfurization slurry after flash evaporation is used as a cold source to further cool MEA rich solution and improve CO 2 The absorption rate is equivalent to the reduction of the trapping energy consumption.
4. The flash steam condensate is sent to the desorption tower to be used as water supplement, so that the integral water consumption of the system is effectively reduced.
The invention reduces the temperature of the desulfurization slurry through flash evaporation of the desulfurization slurry, thereby reducing the temperature of the flue gas discharged by the desulfurization tower and effectively improving the CO in the flue gas in the absorption tower 2 The absorption rate of (c). The heat is extracted from the desulfurization slurry through the flash evaporation of the desulfurization slurry, the heat in the flue gas is actually utilized, and the part of heat is used for heating the MEA rich solution after being upgraded by the absorption heat pump, so that the consumption of the power plant steam in the MEA regeneration process can be effectively reduced, and the regeneration energy consumption is reduced. The low-temperature desulfurized slurry after flash evaporation is used as a cold source to further cool the MEA rich solution and improve CO 2 The absorption rate is equivalent to the reduction of the trapping energy consumption. The flash steam condensate is sent to the desorption tower to be used as water supplement, and the integral water consumption of the system is effectively reduced.

Claims (8)

1. The energy-saving and water-saving carbon capture device is characterized by comprising a desulfurization unit, a first heat exchange unit, an absorption tower (2) and a desorption tower (3), wherein the desulfurization unit is provided with a flue gas inlet and a flue gas outlet, and the flue gas outlet is connected with the flue gas inlet formed in the absorption tower (2);
an MEA lean solution inlet is formed in the absorption tower (2) and is connected with an MEA lean solution outlet formed in the desorption tower (3);
an MEA rich liquid outlet formed in the absorption tower (2) is connected with an MEA rich liquid inlet formed in the desorption tower (3) through a heat exchange unit;
a steam outlet formed in the desulfurization unit is connected with the heat exchange unit;
and a carbon dioxide outlet is formed in the desorption tower (3).
2. The energy-saving and water-saving carbon capture device according to claim 1, wherein the desulfurization unit comprises a desulfurization tower (1) and a flash tank (4), wherein the desulfurization tower (1) is provided with a flue gas inlet and a flue gas outlet, and the flue gas outlet is connected with a flue gas inlet arranged on the absorption tower (2); a slurry outlet formed in the desulfurizing tower (1) is connected with a slurry inlet formed in the flash tank (4); a slurry outlet arranged on the flash tank (4) is connected with a slurry inlet on the desulfurizing tower (1); and a steam outlet formed in the flash tank (4) is connected with the first heat exchange unit.
3. The energy-saving and water-saving carbon capture device according to claim 2, wherein a second heat exchange unit is arranged between a slurry outlet formed in the desulfurizing tower (1) and a slurry inlet formed in the flash tank (4).
4. The energy and water saving carbon capture device according to claim 3, wherein the second heat exchange unit is a heat exchanger (6).
5. The energy-saving and water-saving carbon capture device according to claim 4, wherein the heat exchange unit comprises an absorption heat pump (5) and a lean-rich liquid heat exchanger (7), wherein a steam outlet of the desulfurization unit is connected with a steam inlet on the absorption heat pump (5); a first condensate outlet formed in the absorption heat pump (5) is connected with a condensate inlet formed in the desorption tower (3);
an MEA rich liquid outlet formed in the absorption tower (2) is connected with an MEA rich liquid inlet formed in the desorption tower (3) through a poor-rich liquid heat exchanger (7) and an absorption heat pump (5) in sequence;
an MEA barren solution outlet arranged on the desorption tower (3) is connected with an MEA barren solution inlet arranged on the absorption tower (2) through a barren-rich solution heat exchanger (7) and a heat exchanger (6) in sequence.
6. The energy-saving and water-saving carbon capture device according to claim 5, wherein the absorption heat pump (5) is provided with a driving steam inlet and a second condensed water outlet, and the second condensed water outlet is connected with a clean water tank.
7. An energy-saving and water-saving carbon capture method is characterized by comprising the following steps:
enabling the flue gas (8) to enter a desulfurization unit for slurry flash evaporation to obtain flash evaporation steam, low-temperature desulfurization slurry and primary saturated wet flue gas;
the primary saturated wet flue gas enters an absorption tower (3) to be in countercurrent contact with MEA lean solution, carbon dioxide in the low-temperature flue gas is absorbed, and the flue gas after the carbon dioxide is absorbed is discharged;
the MEA rich solution at the bottom of the absorption tower (3) exchanges heat with the flash steam through the first heat exchange unit to become high-temperature rich solution, and the high-temperature rich solution enters the desorption tower (4) to be desorbed.
8. The energy-saving and water-saving carbon capture method according to claim 7, characterized in that the flash steam generated by the desulfurization unit enters an absorption heat pump to provide heat for the MEA rich solution discharged from the bottom of the absorption tower (3), so that the MEA rich solution forms a high-temperature rich solution;
the high-temperature rich solution enters a desorption tower (4) to desorb carbon dioxide; and forming an MEA lean solution, wherein the MEA lean solution is cooled through a lean-rich solution heat exchanger (7) and a heat exchanger (6), and then enters the absorption tower (3) for circulation.
CN202210609348.5A 2022-05-31 2022-05-31 Energy-saving and water-saving carbon capture device and method Pending CN115138181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210609348.5A CN115138181A (en) 2022-05-31 2022-05-31 Energy-saving and water-saving carbon capture device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210609348.5A CN115138181A (en) 2022-05-31 2022-05-31 Energy-saving and water-saving carbon capture device and method

Publications (1)

Publication Number Publication Date
CN115138181A true CN115138181A (en) 2022-10-04

Family

ID=83406349

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210609348.5A Pending CN115138181A (en) 2022-05-31 2022-05-31 Energy-saving and water-saving carbon capture device and method

Country Status (1)

Country Link
CN (1) CN115138181A (en)

Similar Documents

Publication Publication Date Title
CN110152489B (en) Carbon dioxide capture system and method based on steam turbine exhaust waste heat recovery
CN214809675U (en) Coal-fired power generation system with coupling of partial oxygen-enriched combustion and post-combustion carbon capture
CN212166984U (en) CO2Trapping system
CN106582200B (en) Temperature swing adsorption power plant flue gas carbon capture system utilizing middle extraction
CN110711463A (en) Gas power plant CO based on solar energy and LNG cold energy2Trapping system
CN105749728B (en) Method and apparatus for capturing carbon dioxide
CN217795387U (en) Low-energy-consumption carbon trapping device
CN114713003A (en) Method for utilizing heat in power plant flue gas CO2 capturing process based on chemical absorption method
CN114832584A (en) CO based on two-phase absorbent rich liquid concentrated phase desorption 2 Trapping system and method
CN217410286U (en) Flue gas deep carbon capture device for recovering waste heat
CN107754568B (en) Low-energy-consumption device for capturing and recovering carbon dioxide by flue gas and gas recovery process
CN218544490U (en) Flue gas waste heat recovery device of coupling carbon entrapment
CN106693614B (en) Compact ammonia-method carbon capture system driven by ammonia-water second-class absorption heat pump
CN202393293U (en) Device for improving cooling effect of cooling tower by means of reducing air moisture
CN102519299B (en) System capable of improving cooling effect of cooling tower by means of reducing moisture content of air
CN217909691U (en) Energy-saving and water-saving carbon capture device
CN217220919U (en) CO 2 And N 2 Composite trapping and purifying system
CN216347344U (en) Device for realizing carbon capture and liquefaction by using ammonia crystallization method
CN115138181A (en) Energy-saving and water-saving carbon capture device and method
CN116078138A (en) Device and process for removing carbon dioxide in flue gas by using hot potash method
CN105561742B (en) A kind of solar energy and geothermal energy united auxiliary carbon dioxide trapping system
CN105251316B (en) The direct thermodynamic-driven of independent solar utilizes mixed working fluid removing CO2System
CN114272735A (en) Flue gas waste heat utilization and carbon capture integrated system
CN114963218A (en) Flue gas waste heat recovery device and method coupled with carbon capture
CN115463521A (en) Low-energy-consumption carbon capture device and method

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