WO2022249771A1 - ミスト排出装置及び吸収液吸収塔 - Google Patents
ミスト排出装置及び吸収液吸収塔 Download PDFInfo
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- WO2022249771A1 WO2022249771A1 PCT/JP2022/017206 JP2022017206W WO2022249771A1 WO 2022249771 A1 WO2022249771 A1 WO 2022249771A1 JP 2022017206 W JP2022017206 W JP 2022017206W WO 2022249771 A1 WO2022249771 A1 WO 2022249771A1
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- WIPO (PCT)
- Prior art keywords
- mist
- demister
- gas
- projecting portion
- discharging device
- Prior art date
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- 239000003595 mist Substances 0.000 title claims abstract description 94
- 238000010521 absorption reaction Methods 0.000 title claims description 57
- 238000007599 discharging Methods 0.000 claims abstract description 36
- 230000002745 absorbent Effects 0.000 claims description 32
- 239000002250 absorbent Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 230000005660 hydrophilic surface Effects 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 54
- 239000007788 liquid Substances 0.000 description 40
- 230000008929 regeneration Effects 0.000 description 34
- 238000011069 regeneration method Methods 0.000 description 34
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 18
- 238000011084 recovery Methods 0.000 description 18
- 238000005406 washing Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000010992 reflux Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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
- B01D53/185—Liquid distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/14—Packed scrubbers
-
- 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
-
- 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
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/04—Regenerating the washing fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Definitions
- This disclosure relates to a mist discharge device and an absorbent absorption tower.
- a moisture separator having a wire mesh layer is known (see Patent Document 1, for example).
- the wire mesh layer separates the droplets contained in the wet steam flowing through it from the wet steam by attaching the droplets to the wire mesh.
- the moisture separator is provided with a drain pan for receiving drain water, which is droplets separated in the wire mesh layer.
- the drain receiver extends along the wire mesh layer in a direction inclined with respect to the horizontal direction, receives drain water from the wire mesh layer, and guides the drain water to the outside of the wire mesh layer in the horizontal direction.
- the flow direction of the wet steam flowing through the wire mesh layer of the moisture separator of Patent Document 1 is horizontal, and the drain water flows vertically downward along the wire mesh layer. ing.
- the gas flowing through the demister that collects the mist flows from the lower side to the upper side in the vertical direction.
- the mist collected by the demister turns into drain water and accumulates inside the demister.
- the drain water will accumulate in the upper part of the demister, and in this case, mist may be scattered again from the accumulated drain water.
- an object of the present disclosure is to provide a mist discharge device and an absorption liquid absorption tower that can suppress re-scattering of mist.
- a mist discharge device of the present disclosure is a mist discharge device for discharging mist collected by a demister, wherein the demister is provided in a gas flow path through which gas flows from the lower side to the upper side in the vertical direction, The lower side serves as the inflow side of the gas, and the upper side serves as the outflow side of the gas, collects the mist contained in the gas, and protrudes downward from the inflow side of the demister. have a department.
- the absorbent absorption tower of the present disclosure includes an absorption tower main body to which a gas containing CO 2 is supplied, an absorbent supply section for supplying an absorbent to the absorption tower main body, and the absorbent supply to the absorption tower main body.
- a demister arranged downstream in the direction of flow of the gas from the absorption liquid supply position of the part and collecting the mist containing the absorption liquid containing CO 2 , and the mist discharging the mist collected by the demister and an ejection device.
- FIG. 1 is a schematic diagram of a CO 2 recovery device according to Embodiment 1.
- FIG. FIG. 2 is a diagram schematically showing a demister and a mist discharging device according to Embodiment 1.
- FIG. FIG. 3 is a perspective view showing a mist discharging device.
- FIG. 4 is a cross-sectional view schematically showing the mist discharging device.
- FIG. 5 is a diagram showing various dimensions in FIG.
- FIG. 6 is a graph showing the performance of each type of mist discharge device.
- FIG. 7 is a cross-sectional view schematically showing a mist discharging device according to Embodiment 2.
- FIG. FIG. 8 is a diagram schematically showing a mist discharging device according to Embodiment 3.
- FIG. 1 is a schematic diagram of a CO 2 recovery device according to Embodiment 1.
- FIG. FIG. 2 is a diagram schematically showing a demister and a mist discharging device according to Embodiment 1.
- FIG. 3 is a perspective view showing a mist discharging device.
- FIG. 4 is a cross-sectional view schematically showing the mist discharging device.
- FIG. 5 is a diagram showing various dimensions in FIG.
- FIG. 6 is a graph showing the performance of each type of mist discharge device.
- the CO 2 recovery apparatus of Embodiment 1 uses a CO 2 absorbent as an absorbent that absorbs carbon dioxide (CO 2 ), removes CO 2 from gas in a CO 2 absorption tower (absorption liquid absorption tower), The CO 2 absorbent is regenerated in the absorbent regeneration tower.
- CO 2 absorbent as an absorbent that absorbs carbon dioxide (CO 2 ), removes CO 2 from gas in a CO 2 absorption tower (absorption liquid absorption tower), The CO 2 absorbent is regenerated in the absorbent regeneration tower.
- a CO 2 recovery apparatus 10 As shown in FIG. 1, a CO 2 recovery apparatus 10 according to Embodiment 1 is introduced with an introduction gas (hereinafter referred to as "gas") 11 containing CO 2 , and the CO 2 in the gas and the CO 2 absorbent 12 are A CO 2 absorption tower (hereinafter referred to as “absorption tower") 13 equipped with a CO 2 absorption part (hereinafter referred to as “absorption part” ) 13A that removes CO 2 by contacting Absorption liquid regeneration tower (hereinafter referred to as "regeneration tower") 14 for regenerating the CO 2 absorption liquid from the rich solution 12A with the steam of the reboiler 61, and the rich solution 12A is extracted from the absorption tower 13 and sent to the regeneration tower 14 side.
- gas introduction gas
- the rich solution supply line 50 to be introduced and the lean solution 12B which is the CO 2 absorbing liquid in which the CO 2 regenerated in the regeneration tower 14 has been diffused, are withdrawn from the regeneration tower 14, introduced into the absorption tower 13, and the CO 2 and a lean solution supply line (absorbent supply unit) 53 that is reused as an absorbent.
- a rich solution 12A absorbing CO 2 and a lean solution 12B dissipating CO 2 are circulated and reused within the CO 2 recovery device. It should be noted that the description of the CO 2 recovery apparatus of this embodiment is only to describe the outline thereof, and some attached equipment is omitted from the description.
- the gas 11 containing CO 2 is supplied to the absorption tower 13 after being cooled by cooling water in the cooling section.
- the absorption tower 13 brings the gas 11 introduced through the gas introduction line 13c into countercurrent contact with the CO 2 absorbent 12 containing an amine-based CO 2 absorption component, and the CO 2 in the gas 11 is converted into CO 2 by a chemical reaction.
- Absorption liquid 12 is made to absorb.
- the CO 2 -removed flue gas 11A from which CO 2 has been removed is mist-collected by the demister 110, and then released from the top 13a to the outside of the system.
- the demister 110 will be described later.
- a water washing section 20 is provided between the CO 2 absorption section 13A and the demister 110 in the absorption tower 13 .
- the water washing section 20 includes a gas-liquid contact section 21 and washing liquid circulation means 22 .
- the gas-liquid contacting part 21 passes through the CO 2 absorbing part 13A and brings the gas 11 accompanied by the CO 2 absorbing liquid 12 that has absorbed CO 2 into gas-liquid contact with the washing water, thereby removing the CO 2 contained in the gas 11 .
- the absorbent 12 is collected with washing water.
- the cleaning liquid circulation means 22 includes a cleaning water receiving tray 23 , a circulation line 24 , a pump 25 , a cleaning water supply section 26 and a cooling section 27 .
- the cleaning water receiving tray 23 is arranged on the upstream side of the gas-liquid contact portion 21 in the gas flow, that is, below the gas-liquid contact portion 21 in the vertical direction. Washing water receiving tray 23 collects washing water that has passed through gas-liquid contact portion 21 and fallen.
- the circulation line 24 connects the wash water receiver 23 and the wash water supply unit 26 outside the absorber 13 .
- a pump 25 is installed in the circulation line 24 and conveys the washing water in a predetermined direction.
- the cleaning water supply part 26 is disposed downstream of the gas-liquid contact part 21 in the gas flow, that is, above the gas-liquid contact part 21 in the vertical direction.
- the washing water supply unit 26 supplies the washing liquid supplied through the circulation line 24 into the absorption tower 13 .
- the supplied cleaning liquid drops onto the gas-liquid contact portion 21 .
- the cleaning water supply unit 26 supplies the cleaning liquid, for example, by injecting the cleaning liquid onto a spray.
- the cooling unit 27 is installed in the circulation line 24 and cools the washing water.
- the water washing unit 20 collects the absorbing liquid contained in the gas 11 by supplying the washing liquid from above the gas-liquid contact part, recovering it from below and circulating it.
- the gas that has passed through the water washing section 20 is accompanied by part of the cleaning liquid containing the absorbing liquid. That is, the gas that has passed through the water washing section 20 is accompanied by mist containing the CO 2 absorbing liquid.
- a demister 110 collects the mist containing the CO2 absorbing liquid.
- the CO 2 recovery device 10 extracts the rich solution 12A that has absorbed CO 2 from the bottom portion 13b of the absorption tower 13 through the rich solution supply line 50 .
- the rich solution 12A is pressurized by the rich solution pump 51, and the rich/lean solution heat exchanger 52 is provided at the intersection of the rich solution supply line 50 and the lean solution supply line 53. After being heated by the lean solution 12B regenerated at , it is supplied to the regeneration tower 14 .
- the regeneration tower 14 discharges the rich solution 12A into the inside from the rich solution introduction part 14a near the top.
- the regeneration tower 14 releases most of the CO 2 within the regeneration tower 14 in an endothermic reaction between the rich solution 12A and steam from the reboiler 61 fed from the bottom.
- the CO 2 absorbent that has released some or most of the CO 2 in the regeneration tower 14 becomes a semi-lean solution.
- this semi-lean solution reaches the bottom 14b of the regeneration tower 14, it becomes a CO 2 absorbent (lean solution) 12B from which almost all of the CO 2 has been removed.
- a part of the lean solution 12B of the rich solution 12A is heated by a reboiler 61 supplied with saturated steam 62 to supply steam to the inside of the regeneration tower 14 .
- an accompanying gas 41 mainly composed of water vapor and CO 2 released from the rich solution 12A and the semi-lean solution in the tower was collected as a mist by the demister 110. After that, it is discharged from the column top 14c.
- An accompanying gas 41 is supplied to the regeneration tower condensation section 40 .
- the regeneration tower condensing section 40 condenses water vapor by cooling the accompanying gas with a cooler 42 , and separates the regeneration tower condensed water (hereinafter referred to as “condensed water”) 44 and CO 2 gas 45 with a gas-liquid separator 43 . do.
- the regeneration tower condensation section 40 injects the separated CO 2 gas 45 into an oil field using, for example, Enhanced Oil Recovery (EOR), or stores it in an aquifer.
- EOR Enhanced Oil Recovery
- the regenerated CO 2 absorbent (lean solution) 12B is extracted from the bottom 14b of the regeneration tower 14 through the lean solution supply line 53 and cooled by the rich solution 12A in the rich/lean solution heat exchanger 52. Then, the pressure is increased by the lean solution pump 54 , cooled by the lean solution cooler 55 , and supplied into the absorption tower 13 .
- a regeneration tower condensing section 40 for condensing moisture from the accompanying gas 41 discharged from the tower top 14 c of the regeneration tower 14 is provided outside the regeneration tower 14 .
- the regeneration tower condensation section 40 includes a discharge line 40a that discharges the accompanying gas 41 from the tower top portion 14c of the regeneration tower 14, a cooler 42 that is interposed in the discharge line 40a, and water vapor condensed by the cooler 42.
- the condensed water 44 separated and refluxed from the accompanying gas 41 by the gas-liquid separator 43 is introduced by the refluxed water circulation pump 46 from the condensed water introduction part 14d on the tower top part 14c side of the rich solution introduction part 14a of the regeneration tower 14. be done.
- the CO 2 recovery device 10 introduces the CO 2 -containing gas 11 into the absorption tower 13 and brings the CO 2 in the gas 11 into contact with the CO 2 absorbent 12 to remove CO 2 .
- the gas supplied to the absorption tower 13 and contacted with the CO 2 absorbent 12 passes through the demister 110 and is discharged out of the system.
- the CO 2 recovery device 10 also introduces the rich solution 12A that has absorbed CO 2 into the regeneration tower 14, and regenerates the CO 2 with reboiler steam.
- the accompanying gas 41 in the regeneration tower 14 passes through the demister 110 and is supplied to the regeneration tower condensation section 40 .
- the CO 2 recovery device 10 circulates and reuses the CO 2 absorbent 12 through the absorption tower 13 and the regeneration tower 14 through a circulation line.
- the CO 2 recovery device 10 condenses moisture from the accompanying gas 41 accompanying the separated CO 2 in the regeneration tower condensation section 40 .
- the CO 2 recovery device 10 cools the accompanying gas 41 and separates the condensed water 44 in which water vapor is condensed and the CO 2 gas 45 .
- the CO 2 recovery device 10 supplies the condensed water 44 to the regeneration tower 14 by refluxing it on the tower top portion 14c side of the rich solution introduction portion 14a into which the rich solution 12A is introduced.
- the demister 110 is installed in the absorption tower 13 .
- the absorption tower main body 112 is a gas channel of the absorption tower through which the exhaust gas 11A flows.
- the absorption tower main body 112 of Embodiment 1 has a cylindrical shape with a circular cross section.
- the shape of the absorption tower main body 112 is not limited to this, and for example, the cross section may be rectangular.
- the absorption tower main body 112 is provided extending in the vertical direction, and the exhaust gas 11A flows from the lower side to the upper side in the vertical direction.
- Demister 110 includes a laminate unit 120 for collecting mist containing CO2 absorbing liquid.
- the laminated unit 120 is composed of a plurality of layers, and each layer has a plurality of linear structures. As the exhaust gas 11A passes through each layer of the laminated unit 120, the mist contained in the exhaust gas 11A is collected. The drain water W contained inside the demister 110 is discharged by a mist discharging device 130 provided below the demister 110 .
- mist discharge device 130 Next, the mist discharge device 130 will be described. As shown in FIGS. 2 to 4, the mist discharge device 130 is provided below the demister 110, that is, in contact with the inflow side of the demister 110 into which the exhaust gas 11A flows. The mist discharging device 130 guides the drain water W accumulated inside the demister 110 downward in the vertical direction, thereby allowing the drain water W to fall under its own weight.
- the mist discharging device 130 has a plurality of protrusions 135 protruding downward from the inflow side of the demister 110 .
- the protruding portion 135 is a plate-like member extending downward, and has a plate surface including a vertical direction and a horizontal direction.
- the plurality of projecting portions 135 are arranged side by side at predetermined intervals in the horizontal direction. That is, the plurality of protruding portions 135, which are plate-like members, are provided so that the plate surfaces are parallel to each other. For this reason, the mist discharging device 130 has a slit-shaped drain port as shown in FIG.
- the projecting portion 135 has a rectangular cross-sectional shape taken along a plane perpendicular to the plate surface.
- the projecting portion 135 is provided in contact with the demister 110 .
- the projecting portion 135 guides the drain water W inside the demister 110 downward in the vertical direction.
- the projecting portion 135 may be configured to have hydrophilicity in order to promote the guidance of the drain water W.
- the protruding portion 135 may be formed including a hydrophilic material.
- the projecting portion 135 is formed using a material having a smaller contact angle than the demister 110, and examples of the material having a smaller contact angle include nylon, which is a thermoplastic resin that is easy to mold.
- the projecting portion 135 may have a surface layer formed by applying a hydrophilic surface treatment.
- the surface layer is, for example, a coating film formed by applying a vitreous coating with a small contact angle.
- the parameter of performance to be compared is the pressure loss in the absorption tower main body 112, and the ratio of the pressure loss of each type when the case without the mist discharge device 130 is set to 1 is used.
- the various dimensions of the mist discharging device 130 include the projection height (a) of the projection 135, the thickness (b) of the projection 135, and the interval (c) between the adjacent projections 135. be.
- the types of the mist discharging device 130 include "ID5", "ID7”, and “ID8".
- ID5 has a protrusion height (a) of 6 mm, a thickness (b) of 2 mm, and a spacing (c) of 2 mm.
- ID7 has a protrusion height (a) of 1 mm, a thickness (b) of 2 mm, and a spacing (c) of 4 mm.
- ID8 has a protrusion height (a) of 1 mm, a thickness (b) of 4 mm, and a spacing (c) of 4 mm.
- the distance (c) between the projections 135 in the mist discharging device 130 is wider than the mesh of the demister 110 .
- the horizontal axis is the type type, and the vertical axis is the pressure loss ratio (pressure loss ratio).
- ID4 is a case where the mist discharge device 130 is not provided, and the pressure loss ratio is 1.
- ID5 has a pressure loss ratio of less than 0.5.
- ID7 also has a pressure loss ratio of less than 0.5.
- ID8 also has a pressure loss ratio below 0.5.
- ID8 the type of demister 110 (mesh mesh) is different, but the pressure loss ratio is less than 0.5 in any type. Therefore, it was confirmed that the pressure loss of the absorption tower main body 112 can be reduced by providing the mist discharge device 130 . In other words, it was confirmed that by discharging the drain water W inside the demister 110 by the mist discharge device 130, clogging of the absorption tower main body 112 by the drain water W was suppressed, and an increase in pressure loss was suppressed.
- FIG. 7 is a cross-sectional view schematically showing a mist discharging device according to Embodiment 2.
- the shape of the projecting portion 151 is different from that of the first embodiment.
- the protruding portion 151 is formed such that the flow direction of the drain water W (the resulting mist) flowing along the protruding portion 151 is inclined with respect to the vertical direction.
- the protruding portion 151 has a tapered shape in which a cross-sectional shape taken along a plane orthogonal to the plate surface is tapered from the upper side to the lower side.
- the tapered shape may be, for example, a triangular shape or a trapezoidal shape, and is not particularly limited.
- FIG. 8 is a diagram schematically showing a mist discharging device according to Embodiment 3.
- FIG. 8 is a diagram schematically showing a mist discharging device according to Embodiment 3.
- the flow direction of the drain water W flowing along the projecting portion 161 is inclined with respect to the vertical direction.
- the protruding portion 161 is inclined with respect to the horizontal direction so as to form a one-sided flow from one end to the other end.
- the mist discharging device 160 is inclined with respect to the horizontal direction.
- the projecting portion 161 which is a plate-like member, is arranged so as to extend in an inclined direction by positioning one end in the horizontal direction upward and the other end in the horizontal direction downward. .
- the drain water W flowing along the projecting portion 161 flows in the direction in which the projecting portion 161 is inclined.
- the projecting portions 135, 151, and 161 are plate-shaped members, but may be rod-shaped members that extend downward, and have a shape that projects downward. If there is, it may have any shape as long as it does not block the absorption tower main body 112 .
- mist discharge devices 130, 150, 160 and the absorbent absorption tower 13 described in the embodiments are understood as follows, for example.
- the mist discharging devices 130, 150, and 160 are mist discharging devices for discharging the mist collected by the demister 110, and the demister 110 moves the gas from the lower side to the upper side in the vertical direction. is provided in the gas flow path (absorber tower main body 112) through which the is circulated, the lower side is the inflow side of the gas, and the upper side is the outflow side of the gas, and the mist contained in the gas is collected, Protrusions 135 , 151 , 161 protrude downward from the inflow side of the demister 110 .
- the mist collected by the demister 110 is discharged to the outside of the demister 110 along the projecting portion 135 . Therefore, the mist can be suitably discharged to the outside of the demister 110, so that the accumulation of the mist in the demister 110 can be suppressed, and the re-scattering of the mist from the accumulated drain water can be suppressed.
- the projecting portions 135, 151, 161 are plate-like members extending downward, and the plate-like members are arranged side by side at predetermined intervals in the horizontal direction.
- the protrusions 135, 151, 161 have a surface layer formed by applying a hydrophilic surface treatment.
- the discharge of mist can be favorably promoted.
- the projections 135, 151, 161 are formed containing a hydrophilic material.
- the discharge of mist can be favorably promoted.
- the projecting portions 151 and 161 are formed so that the flow direction of the mist flowing along the projecting portions 135, 151 and 161 is inclined with respect to the vertical direction.
- the projecting portion 151 has a tapered shape that tapers from the upper side to the lower side.
- the protruding portion 161 is inclined with respect to the horizontal direction so that it flows in one direction from one end to the other end.
- the mist can be easily made to flow in one direction.
- the absorbent absorption tower 13 includes an absorption tower main body 112 to which gas containing CO 2 is supplied, and an absorbent supply section (lean solution supply line) that supplies absorbent to the absorption tower main body 112 53), and a demister 110 arranged downstream in the direction of flow of the gas from the absorbent supply position of the absorbent supply unit of the absorber main body 112 and collecting the mist containing the absorbent containing CO2 . and the above-mentioned mist discharging devices 130, 150, 160 for discharging the mist collected by the demister 110.
- the absorption liquid absorption tower 13 can suppress the re-scattering of mist.
- CO 2 recovery device 11 Introduced gas (gas) 12 CO2 absorbing liquid 12A rich solution 12B lean solution 13A CO2 absorption part 13 CO2 absorption tower 14 absorption liquid regeneration tower 41 entrained gas 42 cooler 43 gas-liquid separator 44 regeneration tower condensed water 45 CO2 gas 46 reflux water circulation pump 50 rich solution supply line 51 rich solution pump 52 rich/lean solution heat exchanger 53 lean solution supply line 110 demister 112 absorption tower main body 130, 150, 160 mist discharge device 135, 151, 161 protruding part
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
図1は、実施形態1に係るCO2回収装置の概略図である。図2は、実施形態1に係るデミスタ及びミスト排出装置を模式的に示す図である。図3は、ミスト排出装置を示す斜視図である。図4は、ミスト排出装置を模式的に示す断面図である。図5は、図4における各種寸法を示す図である。図6は、ミスト排出装置のタイプ別の性能を示すグラフである。先ず、図1を参照して、CO2回収装置について説明する。
実施形態1のCO2回収装置は、二酸化炭素(CO2)を吸収する吸収剤としてCO2吸収剤を用いて、CO2吸収塔(吸収液吸収塔)において、ガスからCO2を除去し、CO2吸収液を吸収液再生塔で再生する。
次に、ミスト排出装置130について説明する。ミスト排出装置130は、図2から図4に示すように、デミスタ110の下方側に、すなわち、排ガス11Aが流入するデミスタ110の流入側に、接して設けられている。ミスト排出装置130は、デミスタ110の内部に溜まるドレン水Wを、鉛直方向の下方側に案内することで、ドレン水Wを自重落下させている。
次に、図7を参照して、実施形態2について説明する。なお、実施形態2では、重複した記載を避けるべく、実施形態1と異なる部分について説明し、実施形態1と同様の構成である部分については、同じ符号を付して説明する。図7は、実施形態2に係るミスト排出装置を模式的に示す断面図である。
実施形態2のミスト排出装置150は、突出部151の形状が、実施形態1と異なる形状となっている。突出部151は、突出部151を伝って流れるドレン水W(となったミスト)の流れ方向が、鉛直方向に対して傾斜するように形成されている。具体的に、突出部151は、板面に直交する面で切った断面形状が、上方側から下方側に向かって先細りとなるテーパ形状となっている。テーパ形状としては、例えば、三角形状であってもよいし、台形形状であってもよく、特に限定されない。
次に、図8を参照して、実施形態3について説明する。なお、実施形態3では、重複した記載を避けるべく、実施形態1及び2と異なる部分について説明し、実施形態1及び2と同様の構成である部分については、同じ符号を付して説明する。図8は、実施形態3に係るミスト排出装置を模式的に示す図である。
実施形態3のミスト排出装置160は、実施形態2と同様に、突出部161が、突出部161を伝って流れるドレン水W(となったミスト)の流れ方向が、鉛直方向に対して傾斜するように形成されている。具体的に、突出部161は、一方の端から他方の端へ向かって片流れとなるように、水平方向に対して傾斜して設けられている。つまり、ミスト排出装置160は、水平方向に対して傾斜して設けられている。具体的に、板状部材となる突出部161は、水平方向の一端を上方側に、水平方向の他端を下方側に位置させることで、傾斜する方向に延在するように配置されている。そして、突出部161を伝って流れるドレン水Wは、突出部161傾斜する方向へ向かって流れる。
11 導入ガス(ガス)
12 CO2吸収液
12A リッチ溶液
12B リーン溶液
13A CO2吸収部
13 CO2吸収塔
14 吸収液再生塔
41 同伴ガス
42 冷却器
43 気液分離器
44 再生塔凝縮水
45 CO2ガス
46 還流水循環ポンプ
50 リッチ溶液供給ライン
51 リッチ溶液ポンプ
52 リッチ・リーン溶液熱交換器
53 リーン溶液供給ライン
110 デミスタ
112 吸収塔本体
130,150,160 ミスト排出装置
135,151,161 突出部
Claims (8)
- デミスタにより捕集したミストを排出するミスト排出装置であって、
前記デミスタは、鉛直方向の下方側から上方側に向かってガスが流通するガス流路に設けられ、下方側が、前記ガスの流入側となり、上方側が、前記ガスの流出側となり、前記ガスに含まれる前記ミストを捕集しており、
前記デミスタの流入側から下方側へ向かって突出して設けられる突出部を備えるミスト排出装置。 - 前記突出部は、下方側へ向かって延在する板状部材であり、
前記板状部材は、水平方向において、所定間隔を空けて複数並べて設けられる請求項1に記載のミスト排出装置。 - 前記突出部は、親水性の表面処理が施されることで形成される表面層を有する請求項1または2に記載のミスト排出装置。
- 前記突出部は、親水性を有する材料を含んで形成される請求項1から3のいずれか1項に記載のミスト排出装置。
- 前記突出部は、前記突出部を伝って流れる前記ミストの流れ方向が、鉛直方向に対して傾斜するように形成される請求項1から4のいずれか1項に記載のミスト排出装置。
- 前記突出部は、上方側から下方側に向かって先細りとなるテーパ形状となっている請求項5に記載のミスト排出装置。
- 前記突出部は、一方の端から他方の端へ向かって片流れとなるように、水平方向に対して傾斜して設けられている請求項5に記載のミスト排出装置。
- CO2を含有するガスが供給される吸収塔本体と、
前記吸収塔本体に、吸収液を供給する吸収液供給部と、
前記吸収塔本体の前記吸収液供給部の吸収液供給位置よりも前記ガスの流れ方向下流側に配置され、CO2を含有する吸収液を含有するミストを捕集するデミスタと、
前記デミスタにより捕集したミストを排出する請求項1から7のいずれか1項に記載のミスト排出装置と、を備える吸収液吸収塔。
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