WO2020075543A1 - リクレーミング装置及び方法並びにco2回収装置並びに方法 - Google Patents
リクレーミング装置及び方法並びにco2回収装置並びに方法 Download PDFInfo
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- WO2020075543A1 WO2020075543A1 PCT/JP2019/038321 JP2019038321W WO2020075543A1 WO 2020075543 A1 WO2020075543 A1 WO 2020075543A1 JP 2019038321 W JP2019038321 W JP 2019038321W WO 2020075543 A1 WO2020075543 A1 WO 2020075543A1
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- Prior art keywords
- waste liquid
- line
- container
- cooler
- cleaning
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000011084 recovery Methods 0.000 title claims description 32
- 239000007788 liquid Substances 0.000 claims abstract description 440
- 239000002699 waste material Substances 0.000 claims abstract description 330
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 197
- 238000004140 cleaning Methods 0.000 claims abstract description 120
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims description 73
- 230000002745 absorbent Effects 0.000 claims description 48
- 239000002250 absorbent Substances 0.000 claims description 48
- 230000008929 regeneration Effects 0.000 claims description 36
- 238000011069 regeneration method Methods 0.000 claims description 36
- 238000010992 reflux Methods 0.000 claims description 24
- 238000011144 upstream manufacturing Methods 0.000 claims description 22
- 238000005406 washing Methods 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 12
- 230000001172 regenerating effect Effects 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 46
- 238000010438 heat treatment Methods 0.000 description 23
- 239000000243 solution Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000014509 gene expression Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
Images
Classifications
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- 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
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/0069—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with degasification or deaeration
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- 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
- B01D53/1418—Recovery of products
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- 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
- B01D53/1468—Removing hydrogen sulfide
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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- B01D—SEPARATION
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/50—Carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
- B08B2209/027—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces
- B08B2209/032—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces by the mechanical action of a moving fluid
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- the present disclosure relates to a reclaiming apparatus and method and a CO 2 recovery apparatus and method.
- a chemical absorption method may be adopted as a method for recovering CO 2 contained in exhaust gas from a power generation facility or the like.
- the chemical absorption method the exhaust gas containing CO 2, by contacting the absorption liquid containing absorbent, by absorbing the CO 2 in the flue gas in the absorption liquid, the removal of CO 2 from the exhaust gas.
- the absorption liquid that has absorbed CO 2 is heated by steam or the like to release the absorbed CO 2 and be regenerated, and then reused as the absorption liquid.
- contaminants from the exhaust gas, deteriorated absorbent, and the like accumulate in the absorbent. Therefore, reclaiming is performed to remove deteriorated substances and the like accumulated in the absorbing solution from the absorbing solution.
- Patent Document 1 As a method of the above-mentioned reclaiming, for example, in Patent Document 1, an absorbing solution and water having absorbed CO 2 in exhaust gas is supplied into a reclaimer (container), and the liquid (absorbing solution and water) in the container is heated. It describes that the evaporated absorption liquid is recovered and returned to the regeneration tower, and the deteriorated substances contained in the absorption liquid are concentrated and separated from the absorption liquid. Further, in Patent Document 1, when a high temperature concentrated waste containing a deteriorated product separated from an absorption liquid by a reclaimer is discharged to the outside of the system, the discharged concentrated waste is cooled in a short time. It is described that the waste is actively cooled by passing it through a cooler.
- waste liquid cooler cooler
- the waste liquid cooler is cleaned by mechanical cleaning every time the waste liquid cooler is operated for a certain period of time.
- mechanical cleaning it takes time to clean the waste liquid cooler after the reclaimer waste liquid is discharged from the system through the waste liquid cooler. Tend to adhere, which may reduce the cooling performance of the waste liquid cooler.
- At least one embodiment of the present invention aims to provide a reclaiming apparatus and method, and a CO 2 recovery apparatus and method capable of efficiently cleaning a waste liquid cooler.
- the reclaiming device is A container for reclaiming the absorbing liquid, A waste liquid line configured to flow waste liquid from the container; A waste liquid cooler provided in the waste liquid line for cooling the waste liquid from the container, A wash water supply line for supplying wash water for washing the waste liquid cooler to the waste liquid cooler; Is provided.
- the wash water can be supplied to the waste liquid cooler via the wash water supply line, so that the waste liquid cooler can be immediately washed after the waste liquid is discharged from the container. Therefore, the waste liquid cooler can be efficiently washed, and thereby, the waste liquid cooler can be effectively prevented from being contaminated.
- the wash water supply line is connected to the waste liquid line,
- the wash water is configured to be supplied to the waste liquid cooler via the waste liquid line.
- the cleaning liquid can be supplied to the waste liquid cooler from the cleaning liquid supply line connected to the waste liquid line, the structure of the cleaning liquid supply system can be simplified. Further, according to the above configuration (2), it is possible to clean a part of the waste liquid line.
- a line configured to be able to supply the cleaning water after cleaning the waste liquid cooler to the container is provided.
- the cleaning water after cleaning the waste liquid cooler can be supplied to the container, the cleaning water supplied to the drainage cooler can be used for the reclaiming process.
- the amount of water used in the entire reclaiming device can be reduced, and the reclaiming process can be performed more efficiently.
- the wash water supply line is connected to the waste liquid line on the upstream side of the waste liquid cooler, The reclaiming device, A recycling line for supplying the cleaning water in the waste liquid line downstream of the waste liquid cooler to the container is further provided.
- the cleaning water after cleaning the waste liquid cooler is supplied to the container by a simple configuration in which a recycling line is provided between the waste liquid cooler downstream of the waste liquid cooler and the container.
- the wash water supply line is connected to the waste liquid line on the downstream side of the waste liquid cooler,
- the cleaning water after cleaning the waste liquid cooler is configured to be supplied from the waste liquid cooler to the container via the waste liquid line on the upstream side of the waste liquid cooler.
- the waste liquid line further comprises a waste liquid pump for pumping the waste liquid from the container.
- a temperature sensor configured to measure the temperature of the waste liquid line on the downstream side of the waste liquid cooler;
- a control unit configured to adjust the discharge amount of the waste liquid through the waste liquid line based on the measurement result of the temperature sensor, Is further provided.
- the discharge amount of the waste liquid through the waste liquid line is adjusted based on the measurement result of the temperature of the waste liquid line on the downstream side of the waste liquid cooler. Can be properly maintained. Thereby, for example, it is possible to suppress the attachment of dirt to the waste liquid cooler due to excessive cooling of the waste liquid.
- the CO 2 recovery device is An absorption tower configured to absorb CO 2 in the exhaust gas with an absorption liquid containing an absorbent; A regeneration tower for regenerating the absorption liquid from the absorption tower, The reclaiming device according to any one of (1) to (7) above, At least a part of the absorption liquid stored in the regeneration tower is configured to be supplied to the container.
- the wash water can be supplied to the waste liquid cooler via the wash water supply line, so that the waste liquid cooler can be immediately washed after the waste liquid is discharged from the container. Therefore, the waste liquid cooler can be efficiently washed, and thereby, the waste liquid cooler can be effectively prevented from being contaminated.
- the CO 2 recovery device is Further comprising a reflux water drum for separating the CO 2 -containing gas discharged from the regeneration tower into CO 2 gas and condensed water, At least a part of the condensed water stored in the reflux water drum is configured to be supplied to the waste liquid cooler as the cleaning water.
- the condensed water separated by the reflux water drum of the CO 2 recovery device is effectively used as cleaning water for cleaning the waste liquid cooler to efficiently clean the waste liquid cooler.
- the reclaiming method comprises: A step of reclaiming the absorbent in the container, After the reclaiming process, discharging the waste liquid from the container through a waste liquid line, Cooling the waste liquid with a waste liquid cooler provided in the waste liquid line, Washing the waste liquid cooler by supplying wash water to the waste liquid cooler through a wash water supply line after cooling the waste liquid; Is provided.
- the wash water is supplied to the waste liquid cooler through the wash water supply line, so that the waste liquid cooler can be immediately washed after the waste liquid is discharged from the container. Therefore, the waste liquid cooler can be efficiently washed, and thereby, the waste liquid cooler can be effectively prevented from being contaminated.
- the wash water supply line is connected to the waste liquid line, In the cleaning step, the cleaning water is supplied to the waste liquid cooler via the waste liquid line.
- the cleaning liquid is supplied from the cleaning liquid supply line connected to the waste liquid line to the waste liquid cooler, so that the structure of the cleaning liquid supply system can be simplified. Further, according to the above method (11), it is possible to clean a part of the waste liquid line.
- the method of (10) or (11) above comprises The method further comprises the step of supplying the cleaning water after cleaning the waste liquid cooler to the container.
- the cleaning water after cleaning the waste liquid cooler is supplied to the container, the cleaning water supplied to the container can be used for the reclaiming process. In this way, by effectively using the wash water after washing the waste liquid cooler, the amount of water used in the entire reclaiming device can be reduced, and the reclaiming process can be performed more efficiently.
- the wash water is supplied to the waste liquid cooler from the wash water supply line connected to the waste liquid line on the upstream side of the waste liquid cooler
- the cleaning water in the waste liquid line on the downstream side of the waste liquid cooler is transferred to the container via a recycling line provided between the waste liquid line and the container. Supply to.
- the cleaning water after cleaning the waste liquid cooler is supplied to the container with a simple configuration in which a recycling line is provided between the waste liquid cooler downstream of the waste liquid cooler and the container.
- the washing water is supplied to the waste liquid cooler from the washing water supply line connected to the waste liquid line on the downstream side of the waste liquid cooler
- the cleaning water is supplied from the waste liquid cooler to the container via the waste liquid line on the upstream side of the waste liquid cooler.
- the CO 2 recovery method is In the absorption tower, a step of absorbing CO 2 in the exhaust gas with an absorbent containing an absorbent, Leading the absorption liquid from the absorption tower to a regeneration tower, and regenerating the absorption liquid in the regeneration tower, Performing the reclaiming method according to any one of (10) to (14), Supplying at least a part of the absorption liquid stored in the regeneration tower to the container, Is provided.
- the wash water can be supplied to the waste liquid cooler through the wash water supply line, it is possible to immediately wash the waste liquid cooler after discharging the waste liquid from the container. Therefore, the waste liquid cooler can be efficiently washed, and thereby, the waste liquid cooler can be effectively prevented from being contaminated.
- a reclaiming device and method and a CO 2 recovery device and method capable of efficiently cleaning a waste liquid cooler.
- absorbent may be H 2 S absorber which absorbs H 2 S
- the absorption liquid may be a H 2 S absorbent including H 2 S absorber.
- the CO 2 absorbent and the CO 2 absorbent may be simply referred to as the absorbent and the absorbent, respectively.
- FIG. 1 is a schematic diagram of an example of a CO 2 recovery device to which a reclaiming device according to an embodiment is applied.
- the CO 2 recovery device shown in FIG. 1 is a device for recovering CO 2 from exhaust gas discharged from power generation equipment, factories and the like.
- a CO 2 recovery device 1 includes an absorption tower 2 for absorbing CO 2 in exhaust gas from a power generation facility and the like, and a regeneration for regenerating the absorption liquid that has absorbed CO 2.
- a tower 4, a reflux water drum 6 configured to separate the gas discharged from the regeneration tower 4 into CO 2 gas and condensed water, and reflux the condensed water to the regeneration tower 4, and to reclaim the absorbing liquid.
- the reclaiming device 10 is provided.
- Exhaust gas containing CO 2 is supplied to the absorption tower 2 through the exhaust gas introduction line 12.
- a pretreatment device for pretreatment (desulfurization, cooling, etc.) of the exhaust gas may be provided on the upstream side of the absorption tower 2, and the exhaust gas after such pretreatment is absorbed. It may be supplied to the tower 2.
- Absorption tower 2 for example, has an absorption portion 14 composed of a filling layer, the absorber 14, the CO 2 absorbing solution containing CO 2 absorbent are supplied from above.
- the exhaust gas flowing into the absorption tower 2 through the exhaust gas introduction line 12 flows upward in the absorption tower 2 from the tower bottom side of the absorption tower 2 and flows into the absorption section 14. Then, in the absorption part 14, the exhaust gas and the CO 2 absorption liquid supplied from above the absorption part 14 come into counterflow contact with each other, whereby the CO 2 in the exhaust gas is absorbed by the CO 2 absorption liquid. ing.
- the CO 2 absorbent may be an aqueous solution of CO 2 absorbent.
- the type of CO 2 absorbent is not particularly limited, and may be, for example, an alkanolamine represented by monoethanolamine or diethanolamine, or a base other than amine such as sodium hydroxide, potassium hydroxide and calcium hydroxide. It may be a sexual substance.
- the exhaust gas from which the CO 2 gas has been removed by contact with the CO 2 absorbing liquid in the absorption section 14 is exhausted to the outside from the tower top 16 of the absorption tower 2.
- the CO 2 absorbing liquid that has absorbed CO 2 in the exhaust gas in the absorption section 14 descends to the tower bottom of the absorption tower 2 and is stored in the tower bottom.
- the CO 2 absorbent stored in the bottom of the absorption tower 2 is a rich absorbent 18 having a higher CO 2 concentration than the CO 2 absorbent stored in the bottom of the regeneration tower 4, which will be described later.
- the rich absorption liquid 18 is supplied from the absorption tower 2 to the regeneration tower 4 via the rich liquid line 20 by a pump (not shown) provided in the rich liquid line 20.
- the rich liquid line 20 is provided with a heat exchanger 22 for exchanging heat between the rich absorbing liquid flowing through the rich liquid line 20 and the lean absorbing liquid flowing through a lean liquid line 36 described later. It may be provided. By heating the rich absorbent by heat exchange with the lean absorbent having a relatively high temperature, regeneration of the absorbent in the regeneration tower 4 described later can be promoted.
- Regenerator 4 is provided with a release unit 24 to release CO 2 gas from the rich absorbing liquid, a cleaning unit 26 for cleaning the CO 2 gas emitted by the emitting unit 24 at reflux water, the.
- the discharge part 24 has a filling material, and the rich absorbing liquid from the rich liquid line 20 is supplied from above.
- the rich absorbing solution releases CO 2 gas by being heated by steam described later in the releasing section 24, and becomes a lean absorbing solution having a relatively low CO 2 content rate.
- the lean absorbent which has released the CO 2 gas in the release section 24, descends from the regeneration tower 4 and is stored in the bottom of the regeneration tower 4.
- the lean absorption liquid 28 is guided to the regenerative heater (reboiler) 32 provided on the reboiler line 30 via the reboiler line 30.
- the regeneration heater 32 at least a part of the lean absorption liquid 28 undergoes heat exchange with a heating medium (such as water vapor) to become saturated vapor, and is introduced to the bottom of the regeneration tower 4.
- the saturated vapor thus generated by the regenerative heater 32 rises in the regenerator 4 toward the discharge section 24 and is used as a heating source for heating the rich absorption liquid in the discharge section 24.
- the lean absorbent stored in the bottom of the regeneration tower 4 (including the lean absorbent not undergoing phase change in the regenerator 32) is withdrawn from the bottom of the regeneration tower 4 and provided in the lean liquid line 36. It is supplied to the absorption part 14 of the absorption tower 2 through the lean liquid line 36 by the feeding pump (not shown) and is reused as the above-mentioned CO 2 absorbing liquid. Note that the lean liquid line 36 may be provided with a cooler 38 for cooling the lean absorbent.
- the CO 2 gas released from the rich absorbing solution in the release section 24 rises to the cleaning section 26 provided above the release section 24 in the regeneration tower 4.
- the cleaning unit 26 may be one that promotes gas-liquid contact between the CO 2 gas and the first cleaning liquid, and may include, for example, one or more trays or packing layers.
- the CO 2 gas that has passed through the cleaning unit 26 is discharged from the top of the regeneration tower 4 and guided to the CO 2 gas line 40.
- a condenser 42 is provided on the CO 2 gas line 40, the CO 2 gas is cooled in the condenser 42, and vapor in the CO 2 gas is condensed.
- the CO 2 gas that has passed through the condenser 42 is guided to the reflux water drum 6 provided on the outlet side of the CO 2 gas line 40.
- the reflux water drum 6 is configured to separate the gas released from the regeneration tower 4 (CO 2 -containing gas) into CO 2 gas and condensed water.
- the condensed water 44 separated by the reflux water drum 6 is stored at the tower bottom of the reflux water drum 6.
- the condensed water 44 is supplied as a cleaning liquid to the cleaning unit 26 of the regeneration tower 4 via the reflux water line 46. Further, the condensed water 44 is supplied to the reclaiming device 10 via a water supply line 58.
- the CO 2 gas separated by the reflux water drum 6 is discharged from the reflux water drum 6 via a recovery line 48 connected to the tower top of the reflux water drum 6, and, for example, a compressor (provided in the recovery line 48 ( After being compressed (not shown), it is taken out of the system as product CO 2 .
- the reclaiming device 10 is repeatedly reused in the CO 2 recovery device 1 to remove the non-volatile components from the CO 2 absorbing liquid in which the non-volatile components such as the contaminants from the exhaust gas and the deterioration products of the absorbing liquid are accumulated. At the same time, the CO 2 absorbent is recovered and returned to the CO 2 recovery device 1.
- FIGS. 2 to 5 are schematic views of the reclaiming apparatus 10 according to the embodiment, respectively.
- a reclaiming apparatus 10 includes a container 50 for storing an absorbing liquid and water (a container for performing a reclaiming process), and an absorbing liquid supply for supplying the absorbing liquid to the container 50.
- an absorbent liquid supply line 54 is provided with an absorbent liquid valve 56 for adjusting the supply amount of the absorbent liquid to the container 50, and a water supply line 58 adjusts the water supply amount to the container 50.
- a water valve 60 is provided for this purpose.
- the heating unit 52 may be configured to heat the liquid in the container by heat exchange between the liquid in the container and the heating medium.
- the heating unit 52 includes a U-shaped steam pipe provided inside the container 50.
- the heating unit 52 the liquid in the container is heated by heat exchange with a heating medium. It may be like this.
- the heating medium supplied to the heating unit 52 may be, for example, steam or oil.
- the heating unit 52 may be configured to heat the liquid in the container 50 with electric power.
- the heating unit 52 may be provided outside the container 50.
- the heating unit 52 heats the mixture of the absorption liquid and water before being supplied to the container 50, on the downstream side of the confluence of the absorption liquid supply line 54 and the water supply line 58. May be configured to do so.
- the absorbent liquid supply line 54 may be configured to guide the lean absorbent liquid from the lean liquid line 36.
- the lean absorption liquid is guided to the absorption liquid supply line 54 from the lean liquid line 36 on the upstream side of the heat exchanger 22, but in other embodiments, the heat The lean absorption liquid may be introduced to the absorption liquid supply line 54 from the lean liquid line 36 on the downstream side of the exchanger 22.
- a part of the condensed water 44 stored in the reflux water drum 6 may be guided to the water supply line 58.
- the water supplied to the container 50 is not limited to the condensed water from the reflux water drum 6. Instead of the condensed water from the reflux water drum 6, or in addition to the condensed water, water from another supply source may be supplied to the container 50.
- the outlet of the steam discharge line 62 may be connected to the regeneration tower 4 as shown in FIG. 1, for example. That is, the steam discharged from the container 50 may be guided to the regeneration tower 4.
- a reclaiming apparatus 10 includes a container 50 described above, a waste liquid recovery tank 78 for storing the waste liquid from the container 50, the container 50 and the waste liquid recovery tank.
- the waste liquid line 68 is provided between the waste liquid line 68 and the waste liquid cooler 72.
- the waste liquid cooler 72 is configured to cool the waste liquid from the container 50.
- the waste liquid cooler 72 is configured to supply a cooling medium, for example, and may be configured to cool the waste liquid by heat exchange with the cooling medium.
- the outline of the procedure for reclaiming the absorbing liquid using the above-mentioned reclaiming device 10 is as follows.
- the absorbing liquid valve 56 and the water valve 60 are opened, the absorbing liquid and water are supplied into the container 50, and the liquid in the container is heated by the heating unit 52, so that the volatile components (water and absorbent ) Is evaporated and the non-volatile components (degradation products of the absorption liquid, etc.) are concentrated in the liquid in the container 50 to separate the absorbent in the liquid from the non-volatile components (absorption liquid regeneration step).
- the vapor containing the absorbent generated by heating is discharged from the container 50 through the vapor discharge line 62 and returned to the regeneration tower 4 of the CO 2 recovery device 1. Absorbent returned to the regenerator 4 it is again used in the CO 2 recovering apparatus 1 as an absorption liquid to absorb CO 2.
- the absorption liquid valve 56 is closed to supply the absorption liquid to the container 50. Stop.
- the water valve 60 is closed to stop the supply of water to the container 50 and the heating of the liquid by the heating unit 52.
- the residue in the container 50 is discharged as waste liquid to the outside of the container 50 through the waste liquid line 68 (discharging step). More specifically, the waste liquid valve 70 provided in the waste liquid line 68 is opened. Further, in the embodiment shown in FIGS. 2 to 4, the valve 92 is opened to start the waste liquid pump 74 provided in the waste liquid line 68. As a result, the waste liquid containing the reclaiming residue remaining in the container 50 after the absorption liquid recovery step is discharged from the container 50 and transferred to the waste liquid recovery tank 78 via the waste liquid line 68. The waste liquid discharged from the container 50 is cooled by the waste liquid cooler 72 provided in the waste liquid line 68, and then transferred to the waste liquid recovery tank 78.
- the reclaiming device 10 further includes a wash water supply line 82 for supplying wash water to the waste liquid cooler 72.
- the wash water supply line 82 is connected to the waste line 68.
- the cleaning water from the cleaning water supply line 82 is supplied to the waste liquid cooler 72 via the waste liquid line 68.
- the wash water supply line 82 is provided with a wash water valve 84 capable of switching the supply state of the wash water to the waste liquid cooler 72.
- desalination makeup water may be introduced to the cleaning water supply line 82 as cleaning water.
- the condensed water 44 stored in the reflux water drum 6 of the CO 2 recovery device 1 may be used.
- one of the condensed water from the reflux water drum 6 is supplied via a branch line 81 branched from a water supply line 58 for supplying water for reclaiming to the container 50. Part is supplied to the cleaning water supply line 82.
- the cleaning water after cleaning the waste liquid cooler 72 is configured to be supplied to the container 50.
- the wash water supply line 82 is connected to the waste liquid line 68 on the upstream side of the waste liquid cooler 72. Further, a recycle line 88 for supplying the washing water in the waste liquid line 68 downstream of the waste liquid cooler 72 to the container is provided.
- the upstream side and the downstream side of the waste liquid line 68 are the container 50 side and the waste liquid recovery tank 78 side of the waste liquid line 68 connecting the container 50 and the waste liquid recovery tank 78, respectively.
- the recycle line 88 is provided so as to connect the portion of the waste liquid line 68 downstream of the waste liquid cooler 72 and upstream of the waste liquid pump 74 to the container 50.
- the recycle line 88 is provided so as to connect the portion of the waste liquid line 68 on the downstream side of the waste liquid cooler 72 and the waste liquid pump 74 to the container 50.
- the recycle line 88 is provided with a valve 90 for switching the supply state of the wash water from the recycle line 88 to the container 50.
- the wash water is guided to the waste liquid cooler 72 via the waste liquid line 68a on the upstream side of the waste liquid cooler 72. Further, the cleaning water after cleaning the waste liquid cooler 72 is supplied to the container 50 via the waste liquid line 68 b and the recycling line 88 on the downstream side of the waste liquid cooler 72.
- the wash water supply line 82 is connected to the waste liquid line 68 on the downstream side of the waste liquid cooler 72. Then, the cleaning water after cleaning the waste liquid cooler 72 is supplied from the waste liquid cooler 72 to the container 50 via the waste liquid line 68a on the upstream side of the waste liquid cooler 72.
- the wash water is guided to the waste liquid cooler 72 via the waste liquid line 68b on the downstream side of the waste liquid cooler 72. Further, the cleaning water after cleaning the waste liquid cooler 72 is supplied to the container 50 via the waste liquid line 68a on the upstream side of the waste liquid cooler 72.
- the cleaning water supplied to the container 50 can be used as part of the water heated together with the absorbing liquid in the container 50 when the next reclaiming is performed.
- the waste liquid line 68 is provided with a waste liquid pump 74 for pumping the waste liquid from the container 50 toward the waste liquid recovery tank 78.
- a waste liquid pump 74 for pumping the waste liquid from the container 50 toward the waste liquid recovery tank 78.
- the waste liquid from the container 50 may be stored in the waste liquid recovery tank 78 after passing through the waste liquid cooler 72 while descending the waste liquid line 68 by its own weight. .
- the reclaiming device 10 is configured to adjust the discharge amount of the waste liquid through the waste liquid line 68 based on the temperature of the waste liquid line 68 downstream of the waste liquid cooler 72.
- the control unit (not shown) may be provided.
- the above-mentioned temperature may be acquired by the temperature sensor 76 provided in the waste liquid line 68 on the downstream side of the waste liquid cooler 72.
- the discharge amount of the waste liquid via the waste liquid line 68 may be adjusted, for example, by adjusting the output of the waste liquid pump 74 or by adjusting the opening degree of the valve 92.
- the discharge amount of the waste liquid via the waste liquid line 68 is adjusted, so that the temperature of the waste liquid at the time of discharging the waste liquid can be appropriately maintained. Thereby, for example, it is possible to suppress the attachment of dirt to the waste liquid cooler 72 due to excessive cooling of the waste liquid.
- the waste liquid is discharged from the container 50 in the discharging process described above, and when the container 50 becomes empty, the waste liquid pump 74 is stopped and the waste liquid valve 70 and the valve 92 are closed.
- the wash water valve 84 is opened to supply the wash water to the waste liquid cooler 72 through the waste liquid line 68a on the upstream side of the waste liquid cooler 72.
- the valve 90 provided in the recycle line 88 is opened, and the cleaning water after cleaning the waste liquid cooler 72 is supplied to the container 50 through the recycle line 88.
- the cleaning water valve 84 and the valve 90 are closed to stop the cleaning of the waste liquid cooler 72 and the supply of the cleaning water to the container 50. With the above procedure, the cleaning of the waste liquid cooler 72 is completed, so that the next reclaiming can be prepared.
- the waste liquid pump 74 is stopped and the valve 92 is closed, and then the cleaning water valve 84. Is opened, and washing water is supplied to the waste liquid cooler 72 through the waste liquid line 68a on the upstream side of the waste liquid cooler 72.
- the waste liquid pump 74 is operated to supply the cleaning water after cleaning the waste liquid cooler 72 to the container 50 via the recycle line 88.
- the waste liquid pump 74 When the container 50 is filled with the cleaning water, the waste liquid pump 74 is stopped and the cleaning water valve 84, the waste liquid valve 70 and the valve 90 are closed to stop the cleaning of the waste liquid cooler 72 and the supply of the cleaning water to the container 50. . With the above procedure, the cleaning of the waste liquid cooler 72 is completed, so that the next reclaiming can be prepared.
- the liquid level in the container 50 may be acquired by a liquid level meter 94 provided in the container.
- the waste liquid pump 74 is stopped and the valve 92 is closed, and then the washing water valve is closed.
- 84 is opened to supply the wash water to the waste liquid cooler 72 through the waste liquid cooler 72 downstream of the waste liquid cooler 72, and the wash water after washing the waste liquid cooler 72 is supplied upstream of the waste liquid cooler 72. It is supplied to the container 50 through the waste liquid line 68a.
- the cleaning water valve 84 and the waste liquid valve 70 are closed to stop the cleaning of the waste liquid cooler 72 and the supply of the cleaning water to the container 50. With the above procedure, the cleaning of the waste liquid cooler 72 is completed, so that the next reclaiming can be prepared.
- the waste liquid is discharged from the container 50 in the discharging process described above, and when the container 50 becomes empty, the waste liquid valve 70 is closed. Then, the wash water valve 84 is opened to supply the wash water to the waste liquid cooler 72 via the waste liquid line 68b on the downstream side of the waste liquid cooler 72, and the wash water after cleaning the waste liquid cooler 72 is supplied to the waste liquid cooler 72. It is supplied to the container 50 via the waste liquid line 68a on the upstream side. When the container 50 is filled with the cleaning water, the cleaning water valve 84 and the waste liquid valve 70 are closed to stop the cleaning of the waste liquid cooler 72 and the supply of the cleaning water to the container 50. With the above procedure, the cleaning of the waste liquid cooler 72 is completed, so that the next reclaiming can be prepared.
- the opening / closing operation of various valves such as the cleaning water valve 84, the waste liquid valve 70, the valve 90 or the valve 92 may be controlled using a control device (not shown).
- the control device may control the opening / closing of each valve based on the liquid level in the container 50.
- the cleaning water can be supplied to the waste liquid cooler 72 via the cleaning water supply line 82, and therefore, immediately after the waste liquid is discharged from the container 50.
- the waste liquid cooler 72 can be washed. Therefore, the waste liquid cooler 72 can be efficiently washed, and thus, the waste liquid cooler 72 can be effectively prevented from being contaminated.
- the cleaning water supplied to the container 50 can be used for the reclaiming process.
- the amount of water used in the entire reclaiming device 10 can be reduced, and the reclaiming process can be performed more efficiently.
- the present invention is not limited to the above-described embodiment, and includes a form in which the above-described embodiment is modified and a form in which these forms are appropriately combined.
- expressions representing shapes such as a square shape and a cylindrical shape not only represent shapes such as a square shape and a cylindrical shape in a strictly geometrical sense, but also to the extent that the same effect can be obtained. , And a shape including an uneven portion and a chamfered portion. Further, in this specification, the expressions “comprising”, “including”, or “having” one element are not exclusive expressions excluding the existence of other elements.
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Abstract
Description
化学吸収法では、CO2を含む排ガスと、吸収剤を含む吸収液とを接触させて、排ガス中のCO2を吸収液に吸収させることで、排ガスからCO2を除去する。CO2を吸収した吸収液は、蒸気等により加熱されることで、吸収したCO2を放出して再生された後、吸収液として再利用される。このようにして吸収液を繰り返し再利用すると、排ガスからの混入物や吸収液劣化物等が吸収液中に蓄積する。そこで、吸収液中に蓄積した劣化物等を該吸収液から除去するリクレーミングが行われる。
また、特許文献1には、リクレーマにて吸収液から分離された劣化物を含む高温の濃縮廃棄物を系外に排出する際、排出される濃縮廃棄物を短時間で冷却するため、該濃縮廃棄物を冷却器に通して積極的に冷却することが記載されている。
しかしながら、このように機械洗浄を行う場合、リクレーマ廃液が廃液クーラを通って系外に排出されてから、廃液クーラの洗浄を行うまでに時間を要することから、廃液クーラの伝熱管等に廃液汚れが付着しやすく、これにより廃液クーラの冷却性能が低下する場合があった。
吸収液のリクレーミング処理をするための容器と、
前記容器からの廃液を流すように構成された廃液ラインと、
前記廃液ラインに設けられ、前記容器からの廃液を冷却するための廃液クーラと、
前記廃液クーラを洗浄するための洗浄水を前記廃液クーラに供給するための洗浄水供給ラインと、
を備える。
前記洗浄水供給ラインは前記廃液ラインに接続され、
前記洗浄水は前記廃液ラインを介して前記廃液クーラに供給されるように構成される。
前記リクレーミング装置は、
前記廃液クーラを洗浄後の前記洗浄水を、前記容器に供給可能に構成されたラインを備える。
前記洗浄水供給ラインは、前記廃液クーラよりも上流側において前記廃液ラインに接続され、
前記リクレーミング装置は、
前記廃液クーラよりも下流側の前記廃液ラインの前記洗浄水を前記容器に供給するためのリサイクルラインをさらに備える。
前記洗浄水供給ラインは、前記廃液クーラよりも下流側において前記廃液ラインに接続され、
前記リクレーミング装置は、
前記廃液クーラを洗浄後の洗浄水を、前記廃液クーラよりも上流側の前記廃液ラインを介して前記廃液クーラから前記容器に供給するように構成される。
前記リクレーミング装置は、
前記廃液ラインに設けられ、前記容器からの廃液を圧送するための廃液ポンプをさらに備える。
前記リクレーミング装置は、
前記廃液クーラよりも下流側において前記廃液ラインの温度を計測するように構成された温度センサと、
前記温度センサの計測結果に基づいて、前記廃液ラインを介した前記廃液の排出量を調節するように構成された制御部と、
をさらに備える。
吸収剤を含有する吸収液に排ガス中のCO2を吸収させるように構成された吸収塔と、
前記吸収塔からの前記吸収液を再生するための再生塔と、
上記(1)乃至(7)の何れかに記載のリクレーミング装置と、を備え、
前記再生塔に貯留された前記吸収液の少なくとも一部が前記容器に供給されるように構成される。
前記CO2回収装置は、
前記再生塔から放出されるCO2含有ガスをCO2ガスと凝縮水とに分離するための還流水ドラムをさらに備え、
前記還流水ドラムに貯留された凝縮水の少なくとも一部が、前記洗浄水として前記廃液クーラに供給されるように構成される。
容器内の吸収液をリクレーミング処理するステップと、
前記リクレーミング処理後、前記容器からの廃液を廃液ラインを介して排出するステップと、
前記廃液ラインに設けられた廃液クーラで前記廃液を冷却するステップと、
前記廃液の冷却後、洗浄水供給ラインを介して前記廃液クーラに洗浄水を供給して前記廃液クーラを洗浄するステップと、
を備える。
前記洗浄水供給ラインは前記廃液ラインに接続され、
前記洗浄するステップでは、前記廃液ラインを介して前記洗浄水を前記廃液クーラに供給する。
前記廃液クーラを洗浄後の前記洗浄水を、前記容器に供給するステップをさらに備える。
前記洗浄するステップでは、前記廃液クーラよりも上流側において前記廃液ラインに接続された前記洗浄水供給ラインから、前記廃液クーラに前記洗浄水を供給し、
前記洗浄水を前記容器に供給するステップでは、前記廃液クーラよりも下流側の前記廃液ラインの前記洗浄水を、該廃液ラインと前記容器との間に設けられたリサイクルラインを介して、前記容器に供給する。
前記洗浄するステップでは、前記廃液クーラよりも下流側において前記廃液ラインに接続された前記洗浄水供給ラインから、前記廃液クーラに前記洗浄水を供給し、
前記洗浄水を前記容器に供給するステップでは、前記廃液クーラよりも上流側の前記廃液ラインを介して前記廃液クーラから前記容器に供給する。
吸収塔において、吸収剤を含有する吸収液に排ガス中のCO2を吸収させるステップと、
前記吸収塔からの前記吸収液を再生塔に導き、該再生塔において前記吸収液を再生するステップと、
上記(10)乃至(14)の何れかに記載のリクレーミング方法を行うステップと、
前記再生塔に貯留された前記吸収液の少なくとも一部を前記容器に供給するステップと、
を備える。
排ガス導入ライン12を介して吸収塔2に流入した排ガスは、吸収塔2の塔底部側から吸収塔2内を上方に流れていき、吸収部14へと流れ込む。そして、吸収部14において、排ガスと、該吸収部14の上方から供給されるCO2吸収液とが対向流接触することにより、排ガス中のCO2がCO2吸収液に吸収されるようになっている。
CO2吸収剤の種類は特に限定されないが、例えば、モノエタノールアミン、ジエタノールアミンに代表されるアルカノールアミンであってもよく、あるいは、水酸化ナトリウム、水酸化カリウム及水酸化カルシウム等のアミン以外の塩基性物質であってもよい。
一方、吸収部14において排ガス中のCO2を吸収したCO2吸収液は、吸収塔2の塔底部に下降し、該塔底部に貯留される。この吸収塔2の塔底部に貯留されたCO2吸収液は、後述する再生塔4の塔底部に貯留されるCO2吸収液に比べてCO2濃度が高いリッチ吸収液18である。このリッチ吸収液18は、リッチ液ライン20に設けられたポンプ(不図示)により、該リッチ液ライン20を介して、吸収塔2から再生塔4に供給されるようになっている。
洗浄部26は、CO2ガスと第1洗浄液との気液接触を促進させるものであればよく、例えば、1段以上のトレイ又は充填層を含んでいてもよい。
例えば図1に示すように、加熱部52は、容器50の内部に設けられたU字形の蒸気管を含み、該加熱部52では、加熱媒体との熱交換により容器内の液体が加熱されるようになっていてもよい。加熱部52に供給される加熱媒体は、例えば、水蒸気や油であってもよい。
廃液クーラ72は、容器50からの廃液を冷却するように構成されている。廃液クーラ72は、例えば、冷却媒体が供給されるようになっており、該冷却媒体との熱交換により、廃液を冷却するように構成されていてもよい。
また、容器50から排出された廃液は、廃液ライン68に設けられた廃液クーラ72で冷却されてから、廃液回収タンク78に移送されるようになっている。
洗浄水供給ライン82には、洗浄水の廃液クーラ72への供給状態を切替え可能な洗浄水バルブ84が設けられている。
なお、本明細書において、廃液ライン68の上流側及び下流側とは、それぞれ、容器50と廃液回収タンク78を結ぶ廃液ライン68の容器50側及び廃液回収タンク78側のことである。
図3に示す実施形態では、リサイクルライン88は、廃液ライン68のうち廃液クーラ72及び廃液ポンプ74の下流側の部位と、容器50とを接続するように設けられている。
廃液ライン68を介した廃液の排出量は、例えば、廃液ポンプ74の出力の調節により、又は、バルブ92の開度調節により調節するようにしてもよい。
以上の手順により、廃液クーラ72の洗浄が完了するので、次回のリクレーミングの準備をすることが可能な状態となる。
以上の手順により、廃液クーラ72の洗浄が完了するので、次回のリクレーミングの準備をすることが可能な状態となる。
なお、容器50内の液面レベルは、容器に設けた液面レベル計94で取得するようにしてもよい。
以上の手順により、廃液クーラ72の洗浄が完了するので、次回のリクレーミングの準備をすることが可能な状態となる。
以上の手順により、廃液クーラ72の洗浄が完了するので、次回のリクレーミングの準備をすることが可能な状態となる。
例えば、「同一」、「等しい」及び「均質」等の物事が等しい状態であることを表す表現は、厳密に等しい状態を表すのみならず、公差、若しくは、同じ機能が得られる程度の差が存在している状態も表すものとする。
また、本明細書において、四角形状や円筒形状等の形状を表す表現は、幾何学的に厳密な意味での四角形状や円筒形状等の形状を表すのみならず、同じ効果が得られる範囲で、凹凸部や面取り部等を含む形状も表すものとする。
また、本明細書において、一の構成要素を「備える」、「含む」、又は、「有する」という表現は、他の構成要素の存在を除外する排他的な表現ではない。
4 再生塔
6 還流水ドラム
10 リクレーミング装置
12 排ガス導入ライン
14 吸収部
16 塔頂部
18 リッチ吸収液
20 リッチ液ライン
22 熱交換器
24 放出部
26 洗浄部
28 リーン吸収液
30 リボイラライン
32 再生加熱器
36 リーン液ライン
38 冷却器
40 CO2ガスライン
42 コンデンサ
44 凝縮水
46 還流水ライン
48 回収ライン
50 容器
52 加熱部
54 吸収液供給ライン
56 吸収液バルブ
58 水供給ライン
60 水バルブ
62 蒸気排出ライン
68 廃液ライン
70 廃液バルブ
72 廃液クーラ
74 廃液ポンプ
76 温度センサ
78 廃液回収タンク
81 分岐ライン
82 洗浄水供給ライン
84 洗浄水バルブ
88 リサイクルライン
90 バルブ
92 バルブ
94 液面レベル計
Claims (15)
- 吸収液のリクレーミング処理をするための容器と、
前記容器からの廃液を流すように構成された廃液ラインと、
前記廃液ラインに設けられ、前記容器からの廃液を冷却するための廃液クーラと、
前記廃液クーラを洗浄するための洗浄水を前記廃液クーラに供給するための洗浄水供給ラインと、
を備えることを特徴とするリクレーミング装置。 - 前記洗浄水供給ラインは前記廃液ラインに接続され、
前記洗浄水は前記廃液ラインを介して前記廃液クーラに供給されるように構成された
ことを特徴とする請求項1に記載のリクレーミング装置。 - 前記廃液クーラを洗浄後の前記洗浄水を、前記容器に供給可能に構成されたラインを備えた
ことを特徴とする請求項1又は2に記載のリクレーミング装置。 - 前記洗浄水供給ラインは、前記廃液クーラよりも上流側において前記廃液ラインに接続され、
前記廃液クーラよりも下流側の前記廃液ラインの前記洗浄水を前記容器に供給するためのリサイクルラインをさらに備える
ことを特徴とする請求項3に記載のリクレーミング装置。 - 前記洗浄水供給ラインは、前記廃液クーラよりも下流側において前記廃液ラインに接続され、
前記廃液クーラを洗浄後の洗浄水を、前記廃液クーラよりも上流側の前記廃液ラインを介して前記廃液クーラから前記容器に供給するように構成された
ことを特徴とする請求項3に記載のリクレーミング装置。 - 前記廃液ラインに設けられ、前記容器からの廃液を圧送するための廃液ポンプをさらに備える
ことを特徴とする請求項1乃至5の何れか一項に記載のリクレーミング装置。 - 前記廃液クーラよりも下流側において前記廃液ラインの温度を計測するように構成された温度センサと、
前記温度センサの計測結果に基づいて、前記廃液ラインを介した前記廃液の排出量を調節するように構成された制御部と、
をさらに備えることを特徴とする請求項1乃至6の何れか一項に記載のリクレーミング装置。 - 吸収剤を含有する吸収液に排ガス中のCO2を吸収させるように構成された吸収塔と、
前記吸収塔からの前記吸収液を再生するための再生塔と、
請求項1乃至7の何れか一項に記載のリクレーミング装置と、を備え、
前記再生塔に貯留された前記吸収液の少なくとも一部が前記容器に供給されるように構成された
ことを特徴とするCO2回収装置。 - 前記再生塔から放出されるCO2含有ガスをCO2ガスと凝縮水とに分離するための還流水ドラムをさらに備え、
前記還流水ドラムに貯留された凝縮水の少なくとも一部が、前記洗浄水として前記廃液クーラに供給されるように構成された
ことを特徴とする請求項8に記載のCO2回収装置。 - 容器内の吸収液をリクレーミング処理するステップと、
前記リクレーミング処理後、前記容器からの廃液を廃液ラインを介して排出するステップと、
前記廃液ラインに設けられた廃液クーラで前記廃液を冷却するステップと、
前記廃液の冷却後、洗浄水供給ラインを介して前記廃液クーラに洗浄水を供給して前記廃液クーラを洗浄するステップと、
を備えることを特徴とするリクレーミング方法。 - 前記洗浄水供給ラインは前記廃液ラインに接続され、
前記洗浄するステップでは、前記廃液ラインを介して前記洗浄水を前記廃液クーラに供給する
ことを特徴とする請求項10に記載のリクレーミング方法。 - 前記廃液クーラを洗浄後の前記洗浄水を、前記容器に供給するステップをさらに備える
ことを特徴とする請求項10又は11に記載のリクレーミング方法。 - 前記洗浄するステップでは、前記廃液クーラよりも上流側において前記廃液ラインに接続された前記洗浄水供給ラインから、前記廃液クーラに前記洗浄水を供給し、
前記洗浄水を前記容器に供給するステップでは、前記廃液クーラよりも下流側の前記廃液ラインの前記洗浄水を、該廃液ラインと前記容器との間に設けられたリサイクルラインを介して、前記容器に供給する
ことを特徴とする請求項12に記載のリクレーミング方法。 - 前記洗浄するステップでは、前記廃液クーラよりも下流側において前記廃液ラインに接続された前記洗浄水供給ラインから、前記廃液クーラに前記洗浄水を供給し、
前記洗浄水を前記容器に供給するステップでは、前記廃液クーラよりも上流側の前記廃液ラインを介して前記廃液クーラから前記容器に供給する
ことを特徴とする請求項12に記載のリクレーミング方法。 - 吸収塔において、吸収剤を含有する吸収液に排ガス中のCO2を吸収させるステップと、
前記吸収塔からの前記吸収液を再生塔に導き、該再生塔において前記吸収液を再生するステップと、
請求項10乃至14の何れか一項に記載のリクレーミング方法を行うステップと、
前記再生塔に貯留された前記吸収液の少なくとも一部を前記容器に供給するステップと、
を備えたことを特徴とするCO2回収方法。
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