Gas treatment equipment

Abstract

To improve a recovery rate of carbon dioxide, in recovering carbon dioxide.SOLUTION: A gas treating apparatus comprises: a separating part that separates exhaust gas exhausted from an exhaust gas generation source into permeable components including carbon dioxide and into non-permeable components which are lower in a carbon dioxide level than the permeable components; a recovering device that recovers heat of the exhaust gas; and a pressure-raising mechanism that raises pressure of exhaust gas supplied from the recovering device and then supplied to the separating part, by the heat recovered by the recovering device. The recovering device may generate steam accompanying the recovery of the heat of exhaust gas, and the pressure-raising mechanism may raise the pressure of exhaust gas by the steam generated by the recovering device.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a gas treatment device.

Background Art

[0002] Patent Document 1 describes that "it generates power in a low-emission turbine system and captures and recovers carbon dioxide from emissions" (abstract). Patent Document 2 describes that "it provides a carbon dioxide recovery system that can efficiently recover carbon dioxide contained in the exhaust gas of an engine" (abstract). Patent Document 3 describes that "it efficiently produces a product gas containing carbon monoxide from a raw material gas containing carbon dioxide" (abstract). Patent Document 4 describes that "it hydrates and separates carbon dioxide contained in the gas to be treated" (abstract). [Prior Art Documents] [Patent Documents] [Patent Document 1] Japanese Patent Application Publication No. 2014-515800 [Patent Document 2] Japanese Unexamined Patent Application Publication No. 2019-217492 [Patent Document 3] Japanese Unexamined Patent Application Publication No. 2021-054707 [Patent Document 4] International Publication No. 2011 / 118405

Summary of the Invention

Problems to be Solved by the Invention

[0003] In the recovery of carbon dioxide, it is preferable to improve the recovery rate of carbon dioxide.

Means for Solving the Problems

[0004] A first embodiment of the present invention provides a gas treatment apparatus. The gas treatment apparatus comprises a separation unit that separates exhaust gas discharged from an exhaust gas source into a permeable component containing carbon dioxide and a non-permeable component having a lower carbon dioxide concentration than the permeable component; a recovery device that recovers heat from the exhaust gas; and a pressure boosting mechanism that increases the pressure of the exhaust gas supplied from the recovery device to the separation unit using the heat recovered by the recovery device.

[0005] The recovery device may generate steam as it recovers heat from the exhaust gas. The pressure boosting mechanism may use the steam generated by the recovery device to increase the pressure of the exhaust gas.

[0006] The pressure boosting mechanism may include a first pressure booster that increases the pressure of the exhaust gas supplied from the recovery device using steam.

[0007] The pressure boosting mechanism may include a second pressure booster that increases the pressure of the permeate component using steam.

[0008] The separation unit may include a first separation unit that separates the exhaust gas into a first permeable component containing carbon dioxide and a first non-permeable component having a lower carbon dioxide concentration than the first permeable component, and a second separation unit that separates the first permeable component into a second permeable component having a higher carbon dioxide concentration than the first permeable component and a second non-permeable component having a lower carbon dioxide concentration than the second permeable component. The permeable component may be the second permeable component. The non-permeable component may include the first non-permeable component and the second non-permeable component.

[0009] The gas treatment device may further include a condenser that produces condensed water by liquefying the steam. The recovery device may generate steam in which at least a portion of the condensed water has evaporated as heat is recovered from the exhaust gas. The pressurization mechanism may increase the pressure of the exhaust gas using the steam in which at least a portion of the condensed water has evaporated.

[0010] The gas treatment device may further include a sulfur oxide treatment device for treating sulfur oxides contained in the exhaust gas. The sulfur oxide treatment device may treat the exhaust gas supplied to the separation unit.

[0011] The gas treatment device may further include a liquid removal device. A liquid for treating the exhaust gas may be supplied to the sulfur oxide treatment device. The liquid removal device may remove at least a part of the liquid that has treated the exhaust gas.

[0012] The gas treatment device may further include at least one of a nitrogen oxide treatment device that treats nitrogen oxides contained in the exhaust gas and a dust removal device that removes particulate matter contained in the exhaust gas.

[0013] The gas treatment device may further include a cooling device that cools the exhaust gas supplied to the separation unit.

[0014] Note that the above summary of the invention does not list all the features of the present invention. Also, sub-combinations of these feature groups can also be inventions.

Brief Description of the Drawings

[0015] [Figure 1] It is a diagram showing an example of a gas treatment system 200 according to one embodiment of the present invention. [Figure 2] It is a perspective view showing an example of the details of the separation unit 10. [Figure 3] It is a diagram showing an example of a cross-section of the separation unit 10 shown in FIG. 2. [Figure 4] It is a diagram showing another example of a gas treatment system 200 according to one embodiment of the present invention. [Figure 5] It is a diagram showing another example of a gas treatment system 200 according to one embodiment of the present invention. [Figure 6] It is a diagram showing an example of a sulfur oxide treatment device 98 and a liquid removal device 99. [Figure 7] It is a view of the scrubber 70 in FIG. 6 as seen in the direction from the gas outlet 78 to the bottom surface 77. [Figure 8] It is a perspective view showing an example of the liquid removal device 99 in FIG. 6. [Figure 9] It is a diagram showing another example of a gas treatment system 200 according to one embodiment of the present invention.

Best Mode for Carrying Out the Invention

[0016] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential for the solution of the invention.

[0017] FIG. 1 is a diagram showing an example of a gas treatment system 200 according to an embodiment of the present invention. The gas treatment system 200 includes an exhaust gas generation source 90, a fuel tank 91, and a gas treatment device 100. The gas treatment device 100 includes a separation unit 10, a recovery device 20, and a pressure boosting mechanism 30. The pressure boosting mechanism 30 may have an expander 32 and a first pressure booster 34. In FIG. 1, the range of the gas treatment device 100 is indicated by a one-dot chain line, and the range of the first pressure booster 34 is indicated by a broken line.

[0018] The exhaust gas generation source 90 discharges exhaust gas 92. The exhaust gas generation source 90 is, for example, an engine. Fuel 93 is stored in the fuel tank 91. Fuel 93 is supplied to the exhaust gas generation source 90. When the gas treatment device 100 is mounted on a ship, the exhaust gas generation source 90 may be a main engine or an auxiliary engine. The main engine is mainly operated while the ship is sailing. The auxiliary engine is mainly operated for power generation of the ship. The auxiliary engine may also be operated while the ship is at anchor.

[0019] The exhaust gas 92 discharged by the exhaust gas generation source 90 and supplied to the recovery device 20 is referred to as exhaust gas 92-1. The recovery device 20 recovers the heat of the exhaust gas 92-1. The recovery device 20 is, for example, an exhaust gas economizer. The recovery device 20 may also be a heat exchanger.

[0020] The exhaust gas 92, from which heat has been recovered by the recovery device 20, is designated as exhaust gas 92-2. Exhaust gas 92-2 is supplied from the recovery device 20 to the booster mechanism 30. In this example, exhaust gas 92-2 is supplied to the first booster 34. The booster mechanism 30 increases the pressure of exhaust gas 92-2 using the heat recovered by the recovery device 20. The exhaust gas 92-2, which has been pressurized by the booster mechanism 30, is designated as exhaust gas 92-3. Exhaust gas 92-3 is supplied to the separation unit 10.

[0021] The recovery device 20 may generate steam 19 as it recovers heat from the exhaust gas 92. The booster mechanism 30 may increase the pressure of the exhaust gas 92-2 using the steam 19. In this example, the steam 19 is supplied to the expander 32. The expander 32 generates driving energy using the energy of the steam 19. The expander 32 may generate driving energy by recovering the energy of the steam 19. This driving energy may be rotational energy. The first booster 34 may be driven by the driving energy generated by the expander 32. In this example, the first booster 34 increases the pressure of the exhaust gas 92-2 using this driving energy. The first booster 34 may be a compressor that compresses the exhaust gas 92-2.

[0022] The separation unit 10 separates the exhaust gas 92-3 into a permeable component Tc and an impermeable component Nc. The permeable component is referred to as permeable component Tc. The impermeable component is referred to as impermeable component Nc. Permeable component Tc contains CO2 (carbon dioxide). The CO2 (carbon dioxide) concentration of impermeable component Nc is lower than the CO2 (carbon dioxide) concentration of permeable component Tc.

[0023] Figure 2 is a perspective view showing an example of the details of the separation unit 10. The separation unit 10 in this example includes a separation material 14. The separation material 14 may be an organic material or an inorganic material. If the separation material 14 is an organic material, it may be a polymer or a resin. The separation material 14 may be a hollow fiber porous material. If the separation material 14 is an inorganic material, it may be silicon oxide (SiO2) or an aluminosilicate (so-called zeolite). The separation unit 10 may be a separation membrane in which the inorganic separation material 14 is formed in a hollow fiber shape.

[0024] The permeable component Tc permeates through the separation material 14. The non-permeable component Nc does not permeate through the separation material 14. The permeable component Tc is the component of the exhaust gas 92 that permeates through the separation material 14. The non-permeable component Nc is the component of the exhaust gas 92 that does not permeate through the separation material 14.

[0025] Figure 3 shows an example of a cross-section of the separation unit 10 shown in Figure 2. Figure 3 is a part of the cross-section of the separation unit 10 in a direction intersecting the direction of travel of the exhaust gas 92. Figure 3 is a cross-sectional view including the outer surface of the cylindrical separation unit 10 shown in Figure 2. The separation unit 10 may include a base material 12.

[0026] If the separating material 14 is an organic material, the base material 12 may be an organic material. If the separating material 14 is an organic material, the base material 12 may be a polymer, a resin, or a porous material. If the separating material 14 is an inorganic material, the base material 12 may be an inorganic material. If the separating material 14 is an inorganic material, the base material 12 may be, for example, a ceramic. In the separating section 10 of this example, the separating material 14 is formed in a film-like manner on the upper surface of the base material 12.

[0027] Inorganic materials tend to have higher heat resistance than organic materials. Therefore, in terms of heat resistance to the heat of exhaust gas 92, it is preferable that the separation material 14 be an inorganic material. Inorganic materials tend to have higher cost resistance than organic materials. Therefore, in terms of cost, it is preferable that the separation material 14 be an organic material.

[0028] The CO2 (carbon dioxide) separation performance of the separation unit 10 is highly dependent on the ratio of the pressure of the exhaust gas 92-3 supplied to the separation unit 10 to the pressure of the permeate component Tc. Let the pressure of the exhaust gas 92-3 be pressure P1. Let the pressure of the permeate component Tc be pressure P2. The CO2 (carbon dioxide) separation performance of the separation unit 10 tends to be higher as the ratio of pressure P2 to pressure P1 (i.e., P2 / P1) decreases.

[0029] As described above, the pressure boosting mechanism 30 increases the pressure of the exhaust gas 92-2. This makes it easier to reduce the ratio of pressure P2 to pressure P1. As a result, the performance of the separation unit 10 (see Figure 1) in separating CO2 (carbon dioxide) is easily improved.

[0030] Figure 4 shows another example of a gas treatment system 200 according to one embodiment of the present invention. In the gas treatment device 100 of this example, the separation unit 10 has a first separation unit 60 and a second separation unit 62. In the gas treatment device 100 of this example, the pressure boosting mechanism 30 further has a second pressure booster 36. The gas treatment device 100 of this example further includes a suction device 80, a valve 81 and a condenser 110. The gas treatment system 200 of this example further includes a condensate pump 82. The gas treatment system 200 of this example differs from the gas treatment system 200 shown in Figure 1 in these respects.

[0031] The first separation unit 60 separates the exhaust gas 92-3 into a first permeable component and a first non-permeable component. The first permeable component is referred to as the first permeable component Tc1. The first non-permeable component is referred to as the first non-permeable component Nc1. The first permeable component Tc1 contains CO2 (carbon dioxide). The CO2 (carbon dioxide) concentration of the first non-permeable component Nc1 is lower than the CO2 (carbon dioxide) concentration of the first permeable component Tc1.

[0032] The second separation unit 62 separates the first permeable component Tc1 into a second permeable component and a second non-permeable component. The second permeable component is designated as the second permeable component Tc2. The second non-permeable component is designated as the second non-permeable component Nc2. The CO2 (carbon dioxide) concentration of the second permeable component Tc2 is higher than that of the first permeable component Tc1. The CO2 (carbon dioxide) concentration of the second non-permeable component Nc2 is lower than that of the second permeable component Tc2.

[0033] In this example, the permeable component Tc is the second permeable component Tc2. In this example, since the separation unit 10 has a first separation unit 60 and a second separation unit 62, the CO2 (carbon dioxide) concentration of the permeable component Tc tends to be higher than in the case where the first separation unit 60 and the second separation unit 62 are not present. In this example, the non-permeable component Nc includes the first non-permeable component Nc1 and the second non-permeable component Nc2.

[0034] The suction device 80 aspirates the first impermeable component Nc1 and the second impermeable component Nc2. The suction device 80 may be a suction blower or a suction pump. The valve 81 adjusts the amount of the first impermeable component Nc1 aspirated by the suction device 80.

[0035] The second booster 36 increases the pressure of the permeate component Tc using steam 19. In this example, the second booster 36 increases the pressure of the second permeate component Tc2. As described above, the expander 32 generates driving energy from steam 19. The second booster 36 may increase the pressure of the permeate component Tc using the driving energy (e.g., rotational energy) generated by the expander 32. The second booster 36 may be a compressor that compresses the permeate component Tc2.

[0036] The condenser 110 produces condensed water 17 by liquefying the steam 19. The condenser 110 may be a cooling device for cooling the steam 19. The condensed water pump 82 sucks in the condensed water 17. The condensed water pump 82 may supply the sucked-in condensed water 17 to the recovery device 20. The condensed water pump 82 may be a suction pump. The recovery device 20 may generate steam 19 in which at least a portion of the condensed water 17 has evaporated as it recovers heat from the exhaust gas 92. The pressurization mechanism 30 may increase the pressure of the exhaust gas 92-2 with the steam 19 in which at least a portion of the condensed water 17 has evaporated. Makeup water other than condensed water 17 may be supplied to the recovery device 20. The steam 19 may include steam in which at least a portion of the condensed water 17 has evaporated and steam in which the makeup water has evaporated. If it is difficult to drive the expander 32 with only the steam 19 obtained by evaporating at least a portion of the condensed water 17, it is preferable that the steam 19 supplied to the expander 32 includes steam obtained by evaporating at least a portion of the condensed water 17 and steam obtained by evaporating makeup water other than the condensed water 17.

[0037] Figure 5 shows another example of a gas treatment system 200 according to one embodiment of the present invention. The gas treatment apparatus 100 in this example further comprises a sulfur oxide treatment apparatus 98 and a liquid removal apparatus 99. The gas treatment apparatus 100 may further comprise at least one of a nitrogen oxide treatment apparatus 96 and a dust removal apparatus 97. The gas treatment apparatus in this example further comprises both the nitrogen oxide treatment apparatus 96 and the dust removal apparatus 97.

[0038] The nitrogen oxide treatment device 96 treats nitrogen oxides (NOx) contained in the exhaust gas 92. Treating nitrogen oxides (NOx) may mean removing nitrogen oxides (NOx). The nitrogen oxide treatment device 96 may be a denitrification device. Such a denitrification device is, for example, a selective catalytic reduction (SCR) device. Alternatively, instead of the gas treatment device 100 being equipped with a nitrogen oxide treatment device 96, the exhaust gas source 90 may have an exhaust gas recirculation (EGR) function.

[0039] If the exhaust gas 92 contains nitrogen oxides (NOx), the separation material 14 (see Figures 2 and 3) is prone to deterioration. Therefore, it is preferable that the nitrogen oxides (NOx) be treated.

[0040] The dust removal device 97 removes particulate matter (PM) contained in the exhaust gas 92. The dust removal device 97 may be an electrostatic precipitator (ESP), a diesel particulate filter (DPF), or an activated carbon filter.

[0041] If the exhaust gas 92 contains particulate matter (PM) and the separation material 14 contains organic material, the separation material 14 is susceptible to deterioration due to the particulate matter (PM). Therefore, if the separation material 14 contains organic material, it is preferable that the particulate matter (PM) contained in the exhaust gas 92 be removed.

[0042] The sulfur oxide treatment device 98 treats sulfur oxides (SOx) contained in the exhaust gas 92. In this example, the sulfur oxide treatment device 98 treats sulfur oxides (SOx) with liquid 76 (described later). Treating sulfur oxides (SOx) may mean removing sulfur oxides (SOx). If the gas treatment device 100 is installed on a ship, the sulfur oxide treatment device 98 may be a scrubber installed on the ship. The sulfur oxide treatment device 98 treats the exhaust gas 92 supplied to the separation unit 10.

[0043] If the exhaust gas 92 contains sulfur oxides (SOx), the separation material 14 is prone to deterioration. Therefore, it is preferable that the sulfur oxides (SOx) contained in the exhaust gas 92 be treated.

[0044] Figure 6 shows an example of a sulfur oxide treatment device 98 and a liquid removal device 99. In Figure 6, the nitrogen oxide treatment device 96 and dust removal device 97 shown in Figure 5 are omitted. When the gas treatment device 100 (see Figure 1) is installed on a ship, the ship may be equipped with a scrubber 70. In this example, the sulfur oxide treatment device 98 and the liquid removal device 99 are included in the scrubber 70. In Figure 6, the respective ranges of the sulfur oxide treatment device 98 and the liquid removal device 99 are indicated by double-headed arrows.

[0045] The scrubber 70 may have a reaction tower 71, a main pipe 72, branch pipes 73, and an outlet 74. The sulfur oxide treatment device 98 may be supplied with a liquid 76 for treating the exhaust gas 92-1. If the gas treatment device 100 (see Figure 1) is installed on a ship, the liquid 76 may be seawater. The liquid 76 may also be an alkaline aqueous solution such as sodium hydroxide (NaOH).

[0046] The liquid 76 supplied to the main pipe 72 may pass through the branch pipes 73 and then be ejected into the reaction tower 71 by the ejection nozzle 74. The ejected liquid 76 may be in the form of a mist. In this example, the mist-like liquid 76 treats the exhaust gas 92-1 inside the reaction tower 71. When we say that the liquid 76 treats the exhaust gas 92-1, we mean that the liquid 76 treats the sulfur oxides (SOx) contained in the exhaust gas 92-1.

[0047] If liquid 76 is an aqueous solution of sodium hydroxide (NaOH), the reaction between sulfur dioxide (SO2) contained in exhaust gas 92-1 and sodium hydroxide (NaOH) is shown by the following chemical formula 1. [Chemical formula 1] SO2 + Na + +OH - →Na+HSO3 -

[0048] Sulfur dioxide (SO2) is converted into bisulfite ions (HSO3) through a chemical reaction. - ) becomes liquid 76 through this chemical reaction, which produces bisulfite ions (HSO3). - It becomes a liquid containing bisulfite ions (HSO3).- The liquid containing ) is referred to as liquid 79. Liquid 79 is the liquid obtained by treating exhaust gas 92-1.

[0049] The reaction tower 71 may have an inner surface 75, a bottom surface 77, and a gas outlet 78. In this example, the exhaust gas 92-1 travels through the inside of the reaction tower 71 from the bottom surface 77 towards the gas outlet 78.

[0050] Figure 7 shows the scrubber 70 in Figure 6, viewed from the gas outlet 78 towards the bottom surface 77. The direction from the gas outlet 78 to the bottom surface 77 may be vertical. The bottom surface 77 may be a horizontal plane. In Figure 7, components other than the reaction tower 71 shown in Figure 6 are omitted.

[0051] The exhaust gas 92-1 may swirl inside the reaction tower 71. In this example, the exhaust gas 92-1 swirls clockwise inside the reaction tower 71. The scrubber 70 may be a cyclone-type scrubber. In a cyclone-type scrubber, the exhaust gas 92-1 swirls inside the reaction tower 71, moving from the bottom surface 77 (see Figure 6) towards the gas outlet 78 (see Figure 6). The swirling direction of the exhaust gas 92-1 is denoted as swirling direction F1.

[0052] If the liquid 76 ejected from the ejection port 74 is in the form of a mist, the liquid 79 after the chemical reaction may also be in the form of a mist. When the liquid 79 is in the form of a mist, it is easily carried along with the exhaust gas 92-2. For this reason, when the liquid 79 is in the form of a mist, it is easily introduced into the first separation unit 60 after being discharged from the gas outlet 78. The liquid 79 contains bisulfite ions (HSO3 - Since it contains ), if the liquid 79 is introduced into the first separation section 60, the separating material 14 (see Figures 2 and 3) is prone to deterioration. For this reason, it is preferable that the liquid 79 is not introduced into the first separation section 60.

[0053] Inorganic material separation material 14 (see Figures 2 and 3) is more susceptible to degradation by liquid 79 than organic material separation material 14. For this reason, in the gas processing apparatus 100 shown in Figures 1 and 4, it is preferable that the separation material 14 of the first separation unit 60 be an inorganic material. In the gas processing apparatus 100 shown in Figures 5 to 7, the separation material 14 of the first separation unit 60 may be an organic material or an inorganic material.

[0054] The CO2 (carbon dioxide) separation performance of organic material separation material 14 (see Figures 2 and 3) tends to be higher than that of inorganic material separation material 14. For this reason, in the gas treatment apparatus 100 shown in Figures 5 to 7, it is preferable that the separation material 14 of the first separation section 60 be an organic material. In the gas treatment apparatus 100 shown in Figures 1 and 4 to 7, the concentration of liquid 79 contained in the first permeate component Tc1 tends to be lower than the concentration of liquid 79 contained in the exhaust gas 92-3. For this reason, it is preferable that the separation material 14 of the second separation section 62 be an organic material.

[0055] Figure 8 is a perspective view showing an example of the liquid removal device 99 in Figure 6. The liquid removal device 99 removes at least a portion of the liquid 79. In this example, the liquid removal device 99 removes at least a portion of the liquid 79 contained in the exhaust gas 92-2.

[0056] The liquid removal device 99 in this example has a plurality of vanes 83. The liquid removal device 99 in this example uses the vanes 83 to swirl the exhaust gas 92-2 in a predetermined swirling direction. This swirling direction is called the swirling direction F2. When viewed from the gas outlet 78 (see Figure 6) to the bottom surface 77 (see Figure 6), the liquid removal device 99 in this example swirls the exhaust gas 92-2 in the swirling direction F2. The liquid removal device 99 in this example is a so-called swirler. It is preferable that the swirling direction F2 is the same as the swirling direction F1.

[0057] The liquid removal device 99 in this example increases the swirling speed of the exhaust gas 92-2. This makes it easier for the atomized liquid 79 carried in with the exhaust gas 92-2 to accumulate on the inner surface 75 of the reaction tower 71. The atomized liquid 79 accumulated on the inner surface 75 is prone to droplet formation. The dropletized liquid 79 is prone to falling to the bottom surface 77 of the reaction tower 71 (see Figure 6). As a result, at least a portion of the liquid 79 is removed from the exhaust gas 92-2. This makes it difficult for the liquid 79 to be discharged from the gas outlet 78. As a result, it is difficult for the liquid 79 to be introduced into the first separation section 60 (see Figures 2 and 3).

[0058] The liquid removal device 99 may be a demister in which multiple wires are formed in a mesh-like manner, or it may be a louver in which multiple vanes are spaced apart and arranged continuously. If the scrubber 70 is a cyclone-type scrubber, the liquid removal device 99 is preferably a swirler due to its affinity with the swirling direction F1 (see Figure 7) of the exhaust gas 92-1.

[0059] Figure 9 shows another example of a gas treatment system 200 according to one embodiment of the present invention. The gas treatment device 100 in this example differs from the gas treatment device 100 shown in Figure 4 in that it further comprises a cooling device 120. The cooling device 120 cools the exhaust gas 92 supplied to the separation unit 10. In this example, it cools the exhaust gas 92-3 that has been pressurized by the pressurization mechanism 30. The cooling device 120 may be a heat exchanger.

[0060] The exhaust gas 92-1 discharged from the exhaust gas source 90 is prone to becoming hot. The temperature of the exhaust gas 92-1 is, for example, between 300°C and 400°C. The temperature of the exhaust gas 92-3 pressurized by the pressurization mechanism 30 tends to be higher than the temperature of the exhaust gas 92-2 pressurized by the pressurization mechanism 30. If the exhaust gas 92-3 is not cooled, the separation material 14 (see Figures 2 and 3) is prone to deterioration. For this reason, it is preferable that the exhaust gas 92-3 supplied to the separation unit 10 be cooled. In the gas treatment system 200 of Figures 1 and 5, the gas treatment device 100 may also be equipped with a cooling device 120. In the gas treatment system 200 of Figures 1 and 5, the cooling device 120 cools the exhaust gas 92 supplied to the separation unit 10.

[0061] Although the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above embodiments. It will be clear from the claims that such modified or improved forms may also be included in the technical scope of the present invention.

[0062] It should be noted that the execution order of operations, procedures, steps, and stages in the apparatus, systems, programs, and methods shown in the claims, specifications, and drawings is not explicitly stated as "before," "prior to," etc., and that these can be implemented in any order unless the output of a previous process is used in a later process. Even if the operation flow in the claims, specifications, and drawings is described using phrases such as "first," "next," etc. for convenience, it does not mean that it is essential to perform the operations in that order. [Explanation of symbols]

[0063] 10...Separation section, 12...Base material, 14...Separating material, 17...Condensed water, 19...Steam, 20...Recovery device, 30...Pressure boosting mechanism, 32...Expansion unit, 34...First pressure booster, 36...Second pressure booster, 60...First separation section, 62...Second separation section, 70...Scrubber, 71...Reaction tower, 72...Main pipe, 73...Branch pipe, 74...Ejection section, 75...Inner surface, 76...Liquid, 77...Bottom surface, 78...Gas 79...Liquid, 80...Suction device, 81...Valve, 82...Condenser pump, 83...Impeller, 90...Exhaust gas source, 91...Fuel tank, 92...Exhaust gas, 93...Fuel, 96...Nitrogen oxide treatment device, 97...Dust removal device, 98...Sulfur oxide treatment device, 99...Liquid removal device, 100...Gas treatment device, 110...Condenser, 120...Cooling device, 200...Gas treatment system

Claims

1. A separation unit separates exhaust gas emitted from an exhaust gas source into a permeable component containing carbon dioxide and a non-permeable component with a lower carbon dioxide concentration than the permeable component, using a separation membrane. A recovery device for recovering heat from the exhaust gas, A pressure boosting mechanism that uses the heat recovered by the recovery device to increase the pressure of the exhaust gas supplied from the recovery device to the separation unit and the pressure of the permeate component, Equipped with, The recovery device generates steam in conjunction with the recovery of heat from the exhaust gas. The pressure-boosting mechanism increases the pressure of the exhaust gas and the pressure of the permeate components using the steam generated by the recovery device. Gas treatment device.

2. The gas treatment apparatus according to claim 1, wherein the pressure boosting mechanism has a first pressure booster that increases the pressure of the exhaust gas supplied from the recovery device using the steam.

3. The gas processing apparatus according to claim 1 or 2, wherein the pressure boosting mechanism has a second pressure booster that increases the pressure of the permeate component with the steam.

4. The separation unit includes a first separation unit that separates the exhaust gas into a first permeable component containing carbon dioxide and a first non-permeable component having a lower carbon dioxide concentration than the first permeable component, and a second separation unit that separates the first permeable component into a second permeable component having a higher carbon dioxide concentration than the first permeable component and a second non-permeable component having a lower carbon dioxide concentration than the second permeable component. The aforementioned permeating component is the second permeating component, The impermeable component includes the first impermeable component and the second impermeable component. The gas treatment apparatus according to claim 3.

5. The device further comprises a condensation apparatus that generates condensed water by liquefying the aforementioned steam, The recovery device generates steam from which at least a portion of the condensed water has evaporated as it recovers heat from the exhaust gas. The pressurizing mechanism increases the pressure of the exhaust gas and the pressure of the permeate components by using the steam, which is the result of the evaporation of at least a portion of the condensed water. A gas processing apparatus according to any one of claims 1 to 4.

6. The system further comprises a sulfur oxide treatment device for treating sulfur oxides contained in the exhaust gas, The sulfur oxide treatment apparatus processes the exhaust gas supplied to the separation unit. A gas processing apparatus according to any one of claims 1 to 5.

7. Further equipped with a liquid removal device, The sulfur oxide treatment apparatus is supplied with a liquid for treating the exhaust gas. The liquid removal device removes at least a portion of the liquid obtained by treating the exhaust gas. The gas treatment apparatus according to claim 6.

8. The gas treatment apparatus according to any one of claims 1 to 7, further comprising at least one of a nitrogen oxide treatment apparatus for treating nitrogen oxides contained in the exhaust gas and a dust removal apparatus for removing particulate matter contained in the exhaust gas.

9. The gas treatment apparatus according to any one of claims 1 to 8, further comprising a cooling device for cooling the exhaust gas supplied to the separation unit.

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