WO2015146834A1 - Co2回収装置及びco2回収方法 - Google Patents
Co2回収装置及びco2回収方法 Download PDFInfo
- Publication number
- WO2015146834A1 WO2015146834A1 PCT/JP2015/058498 JP2015058498W WO2015146834A1 WO 2015146834 A1 WO2015146834 A1 WO 2015146834A1 JP 2015058498 W JP2015058498 W JP 2015058498W WO 2015146834 A1 WO2015146834 A1 WO 2015146834A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- absorbing solution
- reservoir
- absorbing
- absorbent
- Prior art date
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
- B01D53/1412—Controlling the absorption process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/12—Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0005—Degasification of liquids with one or more auxiliary substances
- B01D19/001—Degasification of liquids with one or more auxiliary substances by bubbling steam through the liquid
- B01D19/0015—Degasification of liquids with one or more auxiliary substances by bubbling steam through the liquid in contact columns containing plates, grids or other filling elements
-
- 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
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
- B01D3/4283—Bottom stream
-
- 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
- B01D53/1456—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
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
-
- 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
-
- 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
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. 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 invention relates to a CO 2 recovery device and a CO 2 recovery method, and relates to a CO 2 recovery device and a CO 2 recovery method for recovering CO 2 in a gas to be treated using a CO 2 absorbent.
- the liquid level of the CO 2 absorbing liquid is set within a predetermined range using a liquid level gauge. Is controlling.
- the CO 2 absorption liquid regeneration tower of the conventional CO 2 recovery apparatus in order to send the CO 2 absorption liquid stably, it is necessary to secure a certain amount of CO 2 absorption liquid at the tower bottom.
- the stored CO 2 absorbent may be thermally degraded.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a CO 2 recovery apparatus and a CO 2 recovery method that can reduce the thermal degradation at the time of reproduction of the CO 2 absorbing solution.
- CO 2 recovery apparatus of the present invention absorption and CO 2 absorption tower for absorbing the CO 2 to the contained in the gas to be treated by contacting the gas to be treated and the CO 2 absorbing solution in the CO 2 absorbing solution, the CO 2 comprising to the CO 2 absorbing solution regeneration tower by releasing CO 2 to regenerate the CO 2 absorbing solution from the CO 2 absorbing solution by heating the CO 2 absorbing solution with the said CO 2 absorbing solution regeneration tower
- a liquid level measuring device that is disposed in the second reservoir and measures the liquid level of the CO 2 absorbing liquid that changes between the first reservoir and the second reservoir, and the liquid level the CO between the first reservoir on the basis of the measurement result of the measuring device and the second storage unit
- the relatively capacity than the first reservoir is provided with a smaller second reservoir, required for sending stably from the CO 2 absorbing solution regeneration tower to the CO 2 absorber
- the amount of the CO 2 absorbing liquid can be reduced.
- CO 2 recovery apparatus can reduce the residence time of the CO 2 absorbing solution in the CO 2 absorbing solution regeneration tower, it is possible to reduce the thermal deterioration during regeneration of the CO 2 absorbing liquid.
- the liquid level height the secured, entrainment can be prevented gas CO 2 absorbing solution regeneration tower with the liquid feed of CO 2 absorbing solution.
- an inner diameter d2 of the second storage unit is relatively smaller than an inner diameter d1 of the first storage unit.
- the ratio (d2: d1) of the inner diameter d2 of the second reservoir and the inner diameter d1 of the first reservoir is in the range of 1:10 to 1: 2. Is preferred.
- the second reservoir is a cylindrical member provided at the bottom of the CO 2 absorbing liquid regeneration tower.
- the liquid flow rate of the CO 2 absorbent to be fed from the second reservoir to the CO 2 absorption tower is 0.3 m / s or less.
- the liquid flow rate of CO 2 absorption liquid is an appropriate range, winding can be prevented gas CO 2 absorbing solution regeneration tower with the liquid feed of CO 2 absorbing solution.
- CO 2 recovery method of the present invention absorption and CO 2 absorption step of absorbing CO 2 to the contained in the gas to be treated by contacting the gas to be treated and the CO 2 absorbing solution in the CO 2 absorbing solution, the CO 2 wherein to the CO 2 absorbing solution regeneration step by releasing CO 2 to regenerate the CO 2 absorbing solution from the CO 2 absorbing solution the CO 2 absorbing solution by heating in a CO 2 absorbing solution regeneration tower, the said CO in 2 absorbing solution regeneration step, a first reservoir portion in which the CO 2 absorbing solution in the CO 2 absorbing solution regeneration tower is temporarily stored, and the second reservoir a relatively smaller capacity than the first storage part the liquid level of the CO 2 absorbing solution which changes measured between, controls the liquid level of the CO 2 absorbing solution with the first reservoir on the basis of the measured liquid level and the second reservoir It is characterized by doing.
- CO 2 recovery method since relatively capacity than the first reservoir is provided with a smaller second reservoir, required for sending stably from the CO 2 absorbing solution regeneration tower to the CO 2 absorber The amount of the CO 2 absorbing liquid can be reduced.
- CO 2 recovery method can reduce the residence time of the CO 2 absorbing solution in the CO 2 absorbing solution regeneration tower, it is possible to reduce the thermal deterioration during regeneration of the CO 2 absorbing liquid.
- the liquid level height the secured, entrainment can be prevented gas CO 2 absorbing solution regeneration tower with the liquid feed of CO 2 absorbing solution.
- an inner diameter d2 of the second reservoir is relatively smaller than an inner diameter d1 of the first reservoir.
- the ratio (d2: d1) between the inner diameter d2 of the second reservoir and the inner diameter d1 of the first reservoir is in the range of 1:10 to 1: 2. Is preferred.
- the second reservoir is preferably a cylindrical member provided at the bottom of the CO 2 absorbent regenerator.
- the liquid flow rate of the CO 2 absorbing liquid fed from the second reservoir to the CO 2 absorption tower is 0.3 m / s or less.
- the liquid flow rate of CO 2 absorption liquid is an appropriate range, winding can be prevented gas CO 2 absorbing solution regeneration tower with the liquid feed of CO 2 absorbing solution.
- FIG. 1 is a schematic view of a CO 2 recovery apparatus according to the first embodiment.
- FIG. 2 is a schematic enlarged view of the bottom of a general CO 2 absorbent regenerator tower.
- FIG. 3 is a schematic enlarged view of the bottom of a general CO 2 absorbent regenerator.
- FIG. 4 is a schematic enlarged view of the bottom of the CO 2 absorbent regeneration tower according to the present embodiment.
- FIG. 5 is a schematic enlarged view of the tower bottom of the CO 2 absorbent regeneration tower according to the present embodiment.
- FIG. 6 is a diagram showing another configuration example of the CO 2 absorbent regenerator according to the present embodiment.
- FIG. 7A is an explanatory diagram of the distributor according to the present embodiment.
- FIG. 7B is an explanatory diagram of the distributor according to the present embodiment.
- the present inventors have found that in the conventional CO 2 recovery apparatus, CO 2 depending on the residence time of the CO 2 absorbing solution in the CO 2 absorbing solution regeneration tower which heats the CO 2 absorbing solution reproducing the CO 2 absorbing solution We focused on the thermal degradation of the absorbent. And the present inventors provide a CO 2 absorption tower by providing the 2nd storage part with a capacity
- FIG. 1 is a schematic view of a CO 2 recovery apparatus according to an embodiment of the present invention.
- this CO 2 recovery apparatus 1 absorbs CO 2 in an exhaust gas (treated gas) 11A containing CO 2 discharged from industrial equipment such as a boiler and a gas turbine, and has a high concentration. It is a device that recovers as CO 2 gas.
- the CO 2 recovery apparatus 1 includes a cooling tower 12 that cools an exhaust gas 11A containing CO 2 discharged from an industrial facility such as a boiler or a gas turbine, and a cooled exhaust gas 11A that is provided at the rear stage of the cooling tower 12 and is cooled.
- a CO 2 absorption liquid 13 is circulated between a CO 2 absorption tower 14 and a CO 2 absorption liquid regeneration tower 15.
- CO 2 absorbing solution 13 (lean solution) is supplied to the CO 2 absorbing solution regeneration tower 15 as it absorbs CO 2 in the CO 2 absorber 14 the CO 2 absorbing liquid 13 (rich solution), also, the CO 2 absorbing liquid 13 (rich solution) is supplied to the CO 2 absorber 14 as the CO 2 absorbing liquid 13 is almost all CO 2 is removed reproduced (lean solution) in the CO 2 absorbing solution regeneration tower 15.
- the cooling tower 12 has a cooling unit 121 that cools the exhaust gas 11A.
- a circulation line L 1 is provided between the bottom of the cooling tower 12 and the top of the cooling unit 121.
- the circulation line L 1 a heat exchanger 122 for cooling the cooling water W 1
- a circulation pump 123 is provided for circulating the cooling water W 1 in the circulation line L within 1.
- the cooling unit 121 by countercurrent contact between the exhaust gas 11A and the cooling water W 1, the exhaust gas 11A is cooled.
- the heat exchanger 122 cools the cooling water W 1 which is heated by heat exchange with the exhaust gas 11A.
- the circulation pump 123 supplies the cooling water W 1 flowing down to the bottom of the cooling tower 12 via the heat exchanger 122 to the top of the cooling unit 121.
- the CO 2 absorption tower 14 is provided on the lower side of the CO 2 absorption tower 14, and is provided on the CO 2 absorption section 141 to which the exhaust gas 11 A cooled by the cooling tower 12 is supplied, and on the upper side of the CO 2 absorption tower 14.
- a water washing unit 142 The bottom of the washing section 142, the liquid reservoir 144 for storing the cleaning water W 2 for cleaning the exhaust gas 11B which CO 2 has been removed is provided. Between the liquid storage portion 144 and the upper portion of the washing section 142, the circulating circulating the supplied washing water W 2 including the CO 2 absorbing solution 13 recovered by the liquid reservoir 144 from the top side of the washing unit 142 line L 2 is provided.
- This circulation line L 2 a heat exchanger 21 for cooling the wash water W 2, circulating cleaning water W 2 including the CO 2 absorbing solution recovered in the liquid reservoir 144 through the heat exchanger 21 line L
- a circulation pump 22 that circulates in 2 is provided.
- the circulation line L 2 is provided with an extraction line L 3 for extracting a part of the cleaning water W 2 (cleaning water W 3 ) and supplying it to the CO 2 absorber 141.
- the extraction line L 3 is provided with an adjustment valve 23 that adjusts the supply amount of the cleaning water W 3 supplied to the CO 2 absorbent 13 (lean solution).
- the exhaust gas 11B from which CO 2 has been removed rises via the chimney tray 145. Then, the exhaust gas 11B is a flue gas 11C to the CO 2 absorbing liquid 13 to be entrained in the exhaust gas 11B and the gas-liquid contact with washing water W 2 supplied from the top side is recovered by circulating the washing water-washing section 142.
- the exhaust gas 11 ⁇ / b > C is captured by the mist eliminator 146, and is discharged from the top 14 a of the CO 2 absorption tower 14 to the outside.
- the CO 2 absorption liquid 13 (rich solution) that has absorbed CO 2 by the CO 2 absorption tower 14 is the CO 2 absorption liquid.
- a rich solution supply pipe 50 for supplying to the upper side of the regeneration tower 15 is provided.
- a rich / lean solution heat exchanger 52 that heats the CO 2 absorbing solution 13 (rich solution) that has absorbed the CO 2 absorbing solution 13 (lean solution) from which CO 2 has been removed by heating with steam. .
- CO 2 absorbing solution regeneration tower 15 is provided at the center portion of the CO 2 absorbing solution regeneration tower 15, a body portion (first capacitance section) 151 for CO 2 absorbing liquid 13 that CO 2 absorption is supplied, the main body portion 151
- the mirror surface portion 152 of the lower tower bottom portion 15 b and the boot portion (second capacity portion) 153 provided at the bottom portion of the mirror surface portion 152 are provided.
- the boot portion 153 is provided downward from the bottom of the mirror surface portion 152.
- the boot portion 153, the liquid level meter for measuring the liquid level of the CO 2 absorbing solution regeneration tower 15 from the CO 2 absorber 14 to supply CO 2 absorbing solution 13 (liquid level measuring device) 101 is provided.
- the liquid level measured by the liquid level meter 101 is transmitted to the control device 102.
- a circulation line L 4 for circulating the CO 2 absorbent 13 flowing down to the bottom of the tower is provided at the bottom of the boot portion 153 of the CO 2 absorbent regeneration tower 15.
- the circulation line L 4 is provided with a regenerative heater 31 that heats the CO 2 absorbent 13 with saturated steam S.
- This gas discharge line L 5 represents a capacitor 42 which condenses the moisture in the CO 2 gas 41, and the separation drum 43 to separate the CO 2 gas 41 and condensed water W 5 is provided.
- the CO 2 gas 44 from which the condensed water W 5 has been separated is discharged to the outside from the upper part of the separation drum 43.
- the condensed water line L 6 is provided with a condensed water circulation pump 45 that supplies the condensed water W 5 separated by the separation drum 43 to the upper part of the CO 2 absorbent regeneration tower 15.
- a lean solution supply pipe 53 is provided to be supplied to the upper part of the CO 2 absorber 141.
- the lean solution supply pipe 53 is a rich / lean for heating the CO 2 absorbing solution 13 (rich solution) that has absorbed CO 2 by the CO 2 absorbing solution 13 (lean solution) from which CO 2 has been removed by heating with steam.
- a cooling unit 55 is provided for cooling.
- the lean solution pump 54 can control the supply amount of the CO 2 absorbent 13 (lean solution) by the control device 102.
- FIGS. 2 and 3 are schematic enlarged views of the bottom 15b of a general CO 2 absorbent regenerator 15 and FIGS. 4 and 5 show the CO 2 absorbent regenerator 15 according to the present embodiment. It is a typical enlarged view of the tower bottom part 15b. 2 to 5, for convenience of explanation, devices such as a reboiler are omitted.
- a general CO 2 absorbent regenerator 15 includes a cylindrical main body 151 having a predetermined inner diameter d1, and a curved mirror surface 152 provided at the lower portion of the main body 151. Is provided. A chimney tray 154 provided with a plurality of through holes is provided on the upper portion of the main body 151. The steam 13S generated by heating the CO 2 absorbent 13 stored at the bottom of the CO 2 absorbent regeneration tower 15 through the chimney tray 154 is configured to rise. At the bottom of the mirror surface portion 152, the liquid feed tube 156 for feeding toward a CO 2 absorbing solution 13 in the CO 2 absorber 14 is provided.
- a liquid feeding pipe 158 for feeding the gas-liquid mixed CO 2 absorbent 13 that has been partially vaporized by being fed into the CO 2 absorbent regeneration tower 15 is provided.
- a dispersion device 159 for dispersing the gas-liquid mixed CO 2 absorbent 13 in the CO 2 absorbent regenerator 15 is connected to the liquid feeding pipe 158.
- the disperser 159 is a substantially cylindrical member having a notch 159a provided at the center, and disperses the CO 2 absorbent 13 mixed with gas and liquid from the notch 159a downward.
- the CO 2 absorbent 13 is temporarily stored in a predetermined range R1 from the bottom of the mirror surface 152 of the main body 151. CO 2 absorbing liquid 13 to be stored in this range, the CO 2 absorbing liquid that must be reserved for stably from the CO 2 absorbing solution regeneration tower 15 to the CO 2 absorption tower 14 to feed the CO 2 absorbing solution 13 13.
- the main body 151 is provided with a liquid level meter 101 for measuring the liquid level of the CO 2 absorbent 13 stored in the predetermined range R1.
- the liquid level measured by the liquid level gauge 101 is transmitted by the control device 102.
- the control device 102 adjusts the liquid feed amount of the lean solution pump 54 that feeds the CO 2 absorbent regeneration tower 15 to the CO 2 absorber 14 according to the liquid level measured by the level gauge 101.
- the level gauge 101 is installed at a predetermined height H from the upper end portion 152a of the mirror portion 152 in the general CO 2 absorbing liquid regeneration tower 15.
- the absorption liquid regeneration tower 15 can stably stabilize the CO 2 absorption tower 14. while maintaining the liquid volume CO 2 absorbing liquid 13 necessary for sending the CO 2 absorbing solution 13, at the same time, since the distance to the liquid supply pipe 156 is kept from the control liquid level, the liquid feed pipe 156 It is also possible to prevent gas entrainment.
- the control device 102 removes the CO 2 absorbing solution 13 from the lean solution pump 54. Stop feeding.
- the liquid level gauge 101 is thus installed and the liquid level in the predetermined range R2 is controlled, the CO 2 absorbent 13 is dispersed by the disperser 13 and supplied into the CO 2 absorbent regenerator 15. Entrainment of the generated foam can be prevented.
- the CO 2 absorbent regenerator 15 includes a cylindrical main body 151 (first reservoir) having a predetermined inner diameter d1 and a lower portion of the main body 151.
- a mirror surface portion 152 having a curved surface portion provided on the bottom surface and a boot portion (second storage portion) 153 as a cylindrical member are provided on the bottom portion of the mirror surface portion 152 downward from the bottom portion of the mirror surface portion 152.
- a liquid feeding tube 156 is provided at the bottom of the mirror surface portion 153 a of the boot portion 153.
- the CO 2 absorbent 13 is temporarily stored in the main body 151, the mirror surface 152, and the boot 153.
- the boot portion 153 has an inner diameter d2 that is relatively small with respect to the inner diameter d1 of the main body portion 151.
- the ratio (d2: d1) between the inner diameter d1 of the main body 151 and the inner diameter d2 of the boot portion 153 is, for example, 1: 5.
- the main body 151 temporarily stores the CO 2 absorbent 13 so as to have a predetermined height R1 from the bottom of the boot portion 153.
- the level gauge 101 is installed at a predetermined height H from the upper end 153b of the mirror part 153a at the lower end of the boot part 153, and measures the liquid level of the CO 2 absorbent 13 in the boot part 153.
- the liquid level in the boot unit 153 measured by the liquid level meter 101 is transmitted by the control device 102.
- the control device 102 controls the CO 2 absorbent 13 to be fed from the bottom 15b of the CO 2 absorbent regeneration tower 15 by the lean solution pump 54 in accordance with the liquid level in the boot part 153 measured by the liquid level gauge 101. Adjust the liquid volume.
- the boot portion 153 having a relatively smaller capacity than the main body portion 151 is provided at the lower portion of the mirror surface portion 152, so that the general CO 2 absorption shown in FIG. compared with liquid regeneration tower 15, it can be reduced liquid amount of the CO 2 absorbing solution regeneration tower 15 stable in the CO 2 absorber 14 it is necessary to ensure for feeding in CO 2 absorbing liquid 13 Become.
- the dead space of the CO 2 absorbing liquid 13 that occurs at the bottom of the CO 2 absorbing solution regeneration tower 15 can be reduced to a range of R5, heat the CO 2 absorbing liquid 13 It becomes possible to prevent deterioration.
- the boot portion 153 having a relatively smaller capacity than the main body 151 is provided, so that the lower portion of the CO 2 absorbent regeneration tower 15 is provided. Since a sufficient distance between the liquid level of the CO 2 absorbent 13 stored in the tank and the liquid feeding pipe 156 can be secured, it is possible to prevent entrainment of gas in the CO 2 absorbent regeneration tower 15.
- the ratio (d2: d1) between the inner diameter d2 of the boot portion 153 and the inner diameter d1 of the main body portion 151 is in the range of 1:10 to 1: 2. Is preferred. With this configuration, as described above, the CO 2 absorbent 13 required for controlling the liquid level of the CO 2 absorbent 13 can be efficiently reduced, and the liquid level of the CO 2 absorbent 13 can be easily controlled. .
- the ratio (d2: d1) between the inner diameter d2 of the boot portion 153 and the inner diameter d1 of the main body portion 151 is more preferably 1: 8 to 1: 3, and more preferably 1: 5, from the viewpoint of further improving the above-described effects. preferable.
- the liquid flow rate of the CO 2 absorbent 13 that is sent from the boot portion 153 to the CO 2 absorber 14 is preferably 0.3 m / s or less.
- liquid CO 2 absorbing solution regeneration tower 15 to the main body portion 151 from the relatively inner diameter d2 of the boot portion 153 provided with a small CO 2 absorbing liquid 13 of the liquid level CO 2 absorbing solution 13 required to control the even when reducing the amount, it is possible to prevent the entrainment of gas in the CO 2 absorbing solution regeneration tower 15 to the CO 2 absorbing solution 13 fed from the boot 153.
- the liquid flow rate of the CO 2 absorbent 13 fed from the boot portion 153 to the CO 2 absorber 14 is more preferably 0.25 m / s or less, and still more preferably 0.20 m / s or less.
- FIG. 6 is a diagram illustrating another configuration example of the CO 2 absorbent regenerator 15 according to the present embodiment.
- a tip 160 forms a curved surface 160 a (see FIGS. 7A and 7B) along the peripheral surface of the main body 151 near the upper wall surface of the main body 151, and openings 160 b are formed on both sides.
- a disperser 160 is provided.
- the disperser 160 disperses the gas-liquid mixed CO 2 absorbent 13 supplied from the liquid feeding pipe 158 to both sides along the peripheral surface of the main body 151 from the opening 160b (see FIG. 7A).
- the CO 2 absorbing liquid 13 so flows down along the peripheral surface of the main body portion 151, the bottom of the CO 2 absorbing solution 13 and the CO 2 absorbing solution regeneration tower 15 flowing down the CO 2 absorbing solution regeneration tower 15 and CO 2 absorbing solution 13 reservoir was it becomes possible to prevent the occurrence of bubbles upon contact, can be prevented further entrainment of bubbles into the liquid feed pipe 156.
- the present invention is not limited to this configuration.
- the CO 2 absorbing liquid 13 supplied from the liquid feeding pipe 158 is dispersed along the curved surface 160a at the tip of the disperser 160 and provided on both sides. Dispersed along the curved surfaces on both sides from the opening 160b.
- another disperser 161 may be provided on the opposing surface of the disperser 160 provided in the main body 151.
- the disperser 161 includes a curved surface 161a along the peripheral surface of the main body 151, and openings 161b provided on both sides.
- the disperser 160 connected to one liquid supply pipe 158a and the disperser 161 connected to the other liquid supply pipe 158b are each CO 2. Since the absorbing liquid 13 is dispersed, the CO 2 absorbing liquid 13 can be efficiently dispersed.
- Exhaust gas 11A containing CO 2 discharged from industrial facilities such as boilers and gas turbines are cooled by cooling water W 1 and countercurrent contact is introduced into the cooling tower 12.
- the cooled exhaust gas 11A is introduced into the CO 2 absorption tower 14 through the flue 16, and the flow rate of the exhaust gas 11A introduced into the CO 2 absorption tower 14 is measured.
- Exhaust gas 11A which is introduced into the CO 2 absorber 14 is a CO 2 absorbing section 141 are contacted CO 2 absorbing solution 13 and the counter stream comprising alkanolamine, CO 2 in the flue gas 11A is absorbed in the CO 2 absorbing solution 13
- the exhaust gas 11B from which CO 2 has been removed is obtained.
- the exhaust gas 11B from which the CO 2 has been removed rises via the chimney tray 145 and comes into gas-liquid contact with the cleaning water W 2 supplied from the top side of the water washing unit 142, and the CO 2 absorbing solution 13 accompanying the exhaust gas 11B.
- the exhaust gas 11C recovered by the circulation cleaning is obtained.
- the exhaust gas 11 ⁇ / b > C is captured by the mist eliminator 146, and is discharged from the top 14 a of the CO 2 absorption tower 14 to the outside.
- CO 2 absorption tower 14 CO 2 absorbing liquid 13 that has absorbed CO 2 in (rich solution) through a rich-solution supply pipe 50 in a rich-lean solution heat exchanger 52 with the CO 2 absorbing solution 13 (lean solution)
- the rich solvent pump 51 supplies the CO 2 absorbent regeneration tower 15 to the upper part.
- the CO 2 absorbent 13 supplied to the CO 2 absorbent regenerating tower 15 is removed to CO 2 and becomes a semi-lean solution while flowing down to the bottom of the tower via the CO 2 absorbent supply section 151.
- This semi-lean solution is circulated through the circulation line L 4 and heated by the saturated steam S in the regenerative heater 31 to become the CO 2 absorbent 13 (lean solution).
- the CO 2 absorbent 13 (lean solution) at the bottom 15b of the CO 2 absorbent regeneration tower 15 is exchanged with the CO 2 absorbent 13 (rich solution) by the rich / lean solution heat exchanger 52 via the lean solution supply pipe 53.
- the lean solution pump 54 supplies the upper part of the CO 2 absorber 141 of the CO 2 absorber 14.
- the control device 102 controls the liquid level so as to be within a predetermined range R4 between the upper portion 153c of the boot portion 153 and the main body 151 according to the liquid level measured by the flow meter 101.
- control device 102 is in the entire range R4 based on the relational expression between the liquid amount and the liquid level set in each of the range R41 of the main body 151, the range R42 of the mirror surface 152, and the range R3 of the boot portion. Control is performed so that the liquid amount and the liquid level are in a proportional relationship. Thereby, stable liquid level control becomes possible.
- the control unit 102 from the viewpoint of preventing entrainment of liquid delivery time of the gas in the CO 2 absorbing solution 13, it is preferable that the CO 2 absorbing liquid 13 in the boot portion 153 than 0.3 m / s.
- CO 2 recovering apparatus 1 can reduce the residence time of the CO 2 absorbing solution 13 in the CO 2 absorbing solution regeneration tower 15, it is possible to reduce the thermal deterioration at the time of reproduction of the CO 2 absorbing solution 13 .
- the boot portion 153 having a relatively smaller capacity than the main body portion 151 is provided below the main body portion 151, so that a high liquid level is ensured.
- the boot portion 153 may be a member having a relatively smaller capacity than the main body portion 151, and may be a polygonal columnar member such as a triangular prism or a quadrangular prism, for example.
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)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
R-NH2+H2O+CO2→R-NH3HCO3
11A,11B,11C 排ガス
12 冷却塔
121 冷却部
122 熱交換器
123 循環ポンプ
13 CO2吸収液
13S 蒸気
14 CO2吸収塔
14a 塔頂部
14b 塔底部
141 CO2吸収部
142 水洗部
144 液貯留部
145 チムニートレイ
146 ミストエリミネータ
15 CO2吸収液再生塔
15a 塔頂部
151 CO2吸収液供給部
152 鏡面部
153 ブーツ部
153a 鏡面部
153b 底部
153c 上部
154 チムニートレイ
155 スカート部
156,157,158 送液管
159,160 分散器
159a 切欠き部
160a 曲面
160b 開口部
16 煙道
21 熱交換器
22 循環ポンプ
23 調整弁
24 熱交換器
31 再生加熱器
32 調整弁
33 循環ポンプ
41,44 CO2ガス
42 コンデンサ
43 分離ドラム
45 凝縮水循環ポンプ
50 リッチ溶液供給管
51 リッチソルベントポンプ
52 リッチ・リーン溶液熱交換器
53 リーン溶液供給管
54 リーン溶液ポンプ
55 冷却部
101 流量計
102 制御装置
103 CO2濃度計
L1,L2,L4 循環ライン
L3 抜き出しライン
L5 ガス排出ライン
L6 凝縮水ライン
S 飽和水蒸気
W1 冷却水
W2,W3 洗浄水
W4 水蒸気凝縮水
W5 凝縮水
Claims (10)
- 被処理気体とCO2吸収液とを接触させて前記被処理気体に含まれるCO2を前記CO2吸収液に吸収させるCO2吸収塔と、
CO2を吸収した前記CO2吸収液を加熱して当該CO2吸収液からCO2を放出させて前記CO2吸収液を再生するCO2吸収液再生塔と、を具備し、
前記CO2吸収液再生塔は、前記CO2吸収液が一時的に貯留される第1貯留部と、前記第1貯留部の底部から下方に向けて設けられ、前記第1貯留部より相対的に容量が小さい第2貯留部と、前記第2貯留部に配設され、前記第1貯留部と前記第2貯留部との間で変化する前記CO2吸収液の液面レベルを測定する液面測定装置と、前記液面測定装置の測定結果に基づいて第1貯留部と前記第2貯留部との間で前記CO2吸収液の液面レベルを制御する制御装置と、を有することを特徴とする、CO2回収装置。 - 前記第2貯留部の内径d2が、前記第1貯留部の内径d1に対して相対的に小さい、請求項1に記載のCO2回収装置。
- 前記第2貯留部の内径d2と前記第1貯留部の内径d1との比率(d2:d1)が、1:10~1:2の範囲内である、請求項1又は請求項2に記載のCO2回収装置。
- 前記第2貯留部は、前記CO2吸収液再生塔の底部に設けられた円筒状部材である、請求項1から請求項3のいずれか1項に記載のCO2回収装置。
- 前記第2貯留部内から前記CO2吸収塔に送液する前記CO2吸収液の液流速が0.3m/s以下である、請求項1から請求項4のいずれか1項に記載のCO2回収装置。
- 被処理気体とCO2吸収液とを接触させて前記被処理気体に含まれるCO2を前記CO2吸収液に吸収させるCO2吸収工程と、
CO2を吸収した前記CO2吸収液をCO2吸収液再生塔で加熱して当該CO2吸収液からCO2を放出させて前記CO2吸収液を再生するCO2吸収液再生工程と、を含み、
前記CO2吸収液再生工程において、CO2吸収液再生塔の前記CO2吸収液が一時的に貯留される第1貯留部と、前記第1貯留部より相対的に容量が小さい第2貯留部との間で変化する前記CO2吸収液の液面レベルを測定し、測定した液面レベルに基づいて第1貯留部と前記第2貯留部との間で前記CO2吸収液の液面レベルを制御することを特徴とする、CO2回収方法。 - 前記第2貯留部の内径d2が、前記第1貯留部の内径d1に対して相対的に小さい、請求項6に記載のCO2回収方法。
- 前記第2貯留部の内径d2と前記第1貯留部の内径d1との比率(d2:d1)が、1:10~1:2の範囲内である、請求項6又は請求項7に記載のCO2回収方法。
- 前記第2貯留部は、前記CO2吸収液再生塔の底部に設けられた円筒状部材である、請求項6から請求項8のいずれか1項に記載のCO2回収方法。
- 前記第2貯留部内から前記CO2吸収塔に送液する前記CO2吸収液の液流速が0.3m/s以下である、請求項6から請求項9のいずれか1項に記載のCO2回収方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/128,056 US9993767B2 (en) | 2014-03-26 | 2015-03-20 | CO2 recovery device and CO2 recovery method |
CA2943180A CA2943180C (en) | 2014-03-26 | 2015-03-20 | Co2 recovery device and co2 recovery method |
EP15769414.2A EP3108954B1 (en) | 2014-03-26 | 2015-03-20 | Co2 recovery device and co2 recovery method |
AU2015235196A AU2015235196B2 (en) | 2014-03-26 | 2015-03-20 | CO2 recovery device and CO2 recovery method |
US15/978,755 US10213727B2 (en) | 2014-03-26 | 2018-05-14 | CO2 recovery device and CO2 recovery method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-063913 | 2014-03-26 | ||
JP2014063913A JP6361909B2 (ja) | 2014-03-26 | 2014-03-26 | Co2回収装置及びco2回収方法 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/128,056 A-371-Of-International US9993767B2 (en) | 2014-03-26 | 2015-03-20 | CO2 recovery device and CO2 recovery method |
US15/978,755 Division US10213727B2 (en) | 2014-03-26 | 2018-05-14 | CO2 recovery device and CO2 recovery method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015146834A1 true WO2015146834A1 (ja) | 2015-10-01 |
Family
ID=54195352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/058498 WO2015146834A1 (ja) | 2014-03-26 | 2015-03-20 | Co2回収装置及びco2回収方法 |
Country Status (6)
Country | Link |
---|---|
US (2) | US9993767B2 (ja) |
EP (1) | EP3108954B1 (ja) |
JP (1) | JP6361909B2 (ja) |
AU (1) | AU2015235196B2 (ja) |
CA (1) | CA2943180C (ja) |
WO (1) | WO2015146834A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6941063B2 (ja) * | 2018-01-10 | 2021-09-29 | 株式会社東芝 | 二酸化炭素回収システムおよびその運転方法 |
JP7394585B2 (ja) * | 2019-10-30 | 2023-12-08 | 三菱重工業株式会社 | 二酸化炭素回収システム |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS561923B1 (ja) * | 1969-09-09 | 1981-01-16 | ||
JPS6372302A (ja) * | 1986-09-12 | 1988-04-02 | Mitsubishi Oil Co Ltd | 蒸留塔又は水蒸気ストリツピング塔の突沸防止方法及びその装置 |
JPH04126514A (ja) * | 1990-09-19 | 1992-04-27 | Hitachi Ltd | 気体の分離濃縮方法 |
JPH11137960A (ja) * | 1997-11-11 | 1999-05-25 | Kansai Electric Power Co Inc:The | 二酸化炭素吸収液の制御方法及びその装置 |
JP2010201379A (ja) * | 2009-03-04 | 2010-09-16 | Toshiba Corp | 二酸化炭素回収システム |
JP2011240321A (ja) * | 2010-04-20 | 2011-12-01 | Babcock Hitachi Kk | 二酸化炭素除去装置を有する排ガス処理システム |
JP2012110805A (ja) * | 2010-11-22 | 2012-06-14 | Ihi Corp | 二酸化炭素の回収方法及び回収装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US382322A (en) | 1888-05-08 | paesons | ||
DE2043190C3 (de) | 1969-09-09 | 1979-02-15 | Benson, Field & Epes, Berwyn, Pa. (V.St.A.) | Verfahren zur Abtrennung von sauren Gasen aus heißen wasserdampfhaltigen Gasgemischen |
JP3212524B2 (ja) | 1996-12-16 | 2001-09-25 | 関西電力株式会社 | 排煙脱炭酸設備の制御方法 |
JP5351816B2 (ja) * | 2010-04-08 | 2013-11-27 | 三菱重工業株式会社 | 排ガス中の二酸化炭素回収装置及び方法 |
NO335542B1 (no) * | 2012-12-20 | 2014-12-29 | Aker Engineering & Technology | Forbedringer ved absorber for CO2 fangst |
-
2014
- 2014-03-26 JP JP2014063913A patent/JP6361909B2/ja active Active
-
2015
- 2015-03-20 CA CA2943180A patent/CA2943180C/en active Active
- 2015-03-20 AU AU2015235196A patent/AU2015235196B2/en active Active
- 2015-03-20 WO PCT/JP2015/058498 patent/WO2015146834A1/ja active Application Filing
- 2015-03-20 US US15/128,056 patent/US9993767B2/en active Active
- 2015-03-20 EP EP15769414.2A patent/EP3108954B1/en active Active
-
2018
- 2018-05-14 US US15/978,755 patent/US10213727B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS561923B1 (ja) * | 1969-09-09 | 1981-01-16 | ||
JPS6372302A (ja) * | 1986-09-12 | 1988-04-02 | Mitsubishi Oil Co Ltd | 蒸留塔又は水蒸気ストリツピング塔の突沸防止方法及びその装置 |
JPH04126514A (ja) * | 1990-09-19 | 1992-04-27 | Hitachi Ltd | 気体の分離濃縮方法 |
JPH11137960A (ja) * | 1997-11-11 | 1999-05-25 | Kansai Electric Power Co Inc:The | 二酸化炭素吸収液の制御方法及びその装置 |
JP2010201379A (ja) * | 2009-03-04 | 2010-09-16 | Toshiba Corp | 二酸化炭素回収システム |
JP2011240321A (ja) * | 2010-04-20 | 2011-12-01 | Babcock Hitachi Kk | 二酸化炭素除去装置を有する排ガス処理システム |
JP2012110805A (ja) * | 2010-11-22 | 2012-06-14 | Ihi Corp | 二酸化炭素の回収方法及び回収装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3108954A4 * |
Also Published As
Publication number | Publication date |
---|---|
CA2943180C (en) | 2018-10-23 |
EP3108954A1 (en) | 2016-12-28 |
US10213727B2 (en) | 2019-02-26 |
JP2015182065A (ja) | 2015-10-22 |
AU2015235196A8 (en) | 2016-10-13 |
US9993767B2 (en) | 2018-06-12 |
AU2015235196A1 (en) | 2016-10-06 |
JP6361909B2 (ja) | 2018-07-25 |
AU2015235196B2 (en) | 2017-09-21 |
US20180257021A1 (en) | 2018-09-13 |
EP3108954A4 (en) | 2017-03-01 |
CA2943180A1 (en) | 2015-10-01 |
EP3108954B1 (en) | 2018-05-16 |
US20170100693A1 (en) | 2017-04-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6284383B2 (ja) | Co2回収装置及びco2回収方法 | |
JP5693295B2 (ja) | Co2回収装置およびco2回収装置の運転制御方法 | |
WO2013039041A1 (ja) | Co2回収装置およびco2回収方法 | |
US11235277B2 (en) | Carbon dioxide capture system and method of operating carbon dioxide capture system | |
JP6016513B2 (ja) | Co2回収装置およびco2回収方法 | |
JP6200338B2 (ja) | Co2回収装置及びco2回収方法 | |
JP2023162258A (ja) | 二酸化炭素回収システムおよび二酸化炭素回収システムの運転方法 | |
JP2018001086A (ja) | 二酸化炭素回収システムおよび排ガス処理方法 | |
WO2013039040A1 (ja) | Co2回収装置およびco2回収方法 | |
JP6162051B2 (ja) | 気液接触装置及びそれを備えたco2回収装置 | |
JP6361909B2 (ja) | Co2回収装置及びco2回収方法 | |
JP6325376B2 (ja) | Co2回収装置及びco2回収方法 | |
JP6845744B2 (ja) | 二酸化炭素回収システムおよび二酸化炭素回収システムの運転方法 | |
WO2016006415A1 (ja) | Co2回収装置及びco2回収方法 | |
KR101550618B1 (ko) | 리보일링 장치 및 이를 구비한 재생탑 | |
JP2019131426A (ja) | 二酸化炭素回収システムおよび二酸化炭素回収システムの運転方法 | |
JP7524086B2 (ja) | 二酸化炭素回収システムおよび二酸化炭素回収システムの運転方法 | |
Miyamoto et al. | CO 2 recovery device and CO 2 recovery method | |
JP2024073211A (ja) | 二酸化炭素回収装置及び二酸化炭素回収装置の運転方法 | |
JP2018038979A (ja) | 二酸化炭素の分離回収装置、分離回収方法および液体捕捉装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15769414 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2943180 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15128056 Country of ref document: US |
|
REEP | Request for entry into the european phase |
Ref document number: 2015769414 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2015769414 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2015235196 Country of ref document: AU Date of ref document: 20150320 Kind code of ref document: A |