Exhaust gas treatment equipment

Abstract

To enable power costs for a recovery pump or the like to be reduced, in recovering carbon dioxide.SOLUTION: An exhaust 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; and a control pump that controls pressure of the permeable components, on the basis of a temperature difference between a first temperature of a first heat medium and a second temperature of a second heat medium, where the first heat medium is exhaust gas. The control pump may reduce the pressure of the permeable components.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Patent Document 1 describes that "the membrane area of a necessary gas separation membrane is reduced and a high-purity low-permeability gas is obtained at a high recovery rate" (abstract). Patent Document 2 describes that "CO2 gas is efficiently separated in a gaseous state from the exhaust gas of an industrial process" (abstract). Patent Document 3 describes that "the present invention relates to an air purification system for purifying the air in a room." (paragraph 0001). Patent Document 4 describes that "it relates to a method for removing CO2 in combustion exhaust gas from a thermal power plant." (abstract). Patent Document 5 describes that "a carbon dioxide separation and recovery system and a separation and recovery method capable of suppressing the energy required for recovering carbon dioxide to a low level are provided." (abstract). [Prior Art Documents] [Patent Documents] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-128868 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-297655 [Patent Document 3] Japanese Patent No. 6877229 [Patent Document 4] Japanese Patent Application Laid-Open No. Hei 9-70521 [Patent Document 5] Japanese Patent Application Laid-Open No. 2021-159816

Summary of the Invention

Problems to be Solved by the Invention

[0003] In the recovery of carbon dioxide, it is preferable to be able to reduce the power cost of a recovery pump or the like.

Means for Solving the Problems

[0004] In a first aspect of the present invention, an exhaust gas treatment device is provided. The exhaust gas treatment device includes 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, and a control pump that controls the pressure of the permeable component based on the temperature difference between a first temperature of a first heat medium and a second temperature of a second heat medium. The first heat medium is exhaust gas.

[0005] The control pump may reduce the pressure of the permeate component.

[0006] The first heat transfer medium may be exhaust gas separated by the separation unit.

[0007] The first heat transfer medium may be an impermeable component.

[0008] At least a portion of the second heat transfer medium may be supplied to the control pump. At least a portion of the second heat transfer medium supplied to the control pump may be supplied to at least another portion of the second heat transfer medium.

[0009] The exhaust gas treatment device may further include a cooling device for cooling the first heat transfer medium.

[0010] The cooling device may cool the first heat transfer medium with the second heat transfer medium.

[0011] The second heat transfer medium may be the fuel of the exhaust gas source.

[0012] The exhaust gas treatment device may further include a vaporizer for vaporizing fuel. The fuel supplied to the control pump may be supplied to the fuel that is vaporized by the vaporizer.

[0013] The exhaust gas treatment device may further include a vaporizer for vaporizing fuel. The fuel supplied to the control pump may be supplied to the fuel vaporized by the vaporizer.

[0014] The exhaust gas treatment device may further include a gas-liquid separation device that separates the fuel supplied to the control pump into gas and liquid. The gaseous fuel separated by the gas-liquid separation device may be supplied to the fuel vaporized by the vaporizer. The liquid fuel separated by the gas-liquid separation device may be supplied to the fuel vaporized by the vaporizer.

[0015] The exhaust gas treatment device may further include a heating device that heats the fuel of the exhaust gas generation source with a second heat medium.

[0016] The exhaust gas treatment device may further include a vaporizer that vaporizes the fuel. The heating device may heat the fuel vaporized by the vaporizer with the second heat medium supplied to the control pump.

[0017] The exhaust gas treatment device may further include a circulation pump that supplies the second heat medium to at least one of the cooling device and the control pump and sucks the second heat medium supplied to at least one of the cooling device and the control pump.

[0018] The second heat medium may be seawater.

[0019] 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 may also be inventions.

Brief Description of the Drawings

[0020] [Figure 1] It is a diagram showing an example of an exhaust gas treatment device 100 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 an example of the details of the control pump 20. [Figure 5] It is a diagram showing another example of an exhaust gas treatment device 100 according to one embodiment of the present invention. [Figure 6]It is a diagram showing another example of the exhaust gas treatment device 100 according to one embodiment of the present invention. [Figure 7] It is a diagram showing another example of the exhaust gas treatment device 100 according to one embodiment of the present invention. [Figure 8] It is a diagram showing another example of the exhaust gas treatment device 100 according to one embodiment of the present invention. [Figure 9] It is a diagram showing another example of the exhaust gas treatment device 100 according to one embodiment of the present invention. [Figure 10] It is a diagram showing another example of the exhaust gas treatment device 100 according to one embodiment of the present invention. [[ID=!4]]

Embodiments for Carrying Out the Invention

[0021] 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 means of the invention.

[0022] FIG. 1 is a diagram showing an example of an exhaust gas treatment device 100 according to one embodiment of the present invention. The exhaust gas treatment device 100 includes a separation unit 10 and a control pump 20. The exhaust gas treatment device 100 may include a cooling device 30, a vaporization device 40, an exhaust gas generation source 90, an induction machine 91, a valve 92, a valve 93, and a fuel tank 94.

[0023] The exhaust gas generation source 90 discharges exhaust gas 99. The exhaust gas generation source 90 is, for example, an engine. The exhaust gas treatment device 100 may include a plurality of exhaust gas generation sources 90. In this example, the exhaust gas treatment device 100 includes two exhaust gas generation sources 90 (exhaust gas generation source 90-1 and exhaust gas generation source 90-2). In this example, the exhaust gas generation source 90-1 and the exhaust gas generation source 90-2 discharge exhaust gas 99-1 and exhaust gas 99-2, respectively.

[0024] When the exhaust gas treatment device 100 is installed on a ship, the exhaust gas source 90-1 may be the ship's main engine, and the exhaust gas source 90-2 may be the ship's auxiliary engine. The main engine is mainly operated when the ship is underway. The auxiliary engine is mainly operated when the ship is at anchor. The output of the main engine may be 10 times that of the auxiliary engine. The fuel tank 94 stores fuel 98 to operate the exhaust gas source 90.

[0025] The control pump 20 controls the pressure of the permeate component Tc based on the temperature difference between the first temperature of the first heat medium 31 and the second temperature of the second heat medium 32. The control pump 20 is, for example, a vacuum pump. The control pump 20 may be a vacuum pump that exhausts the target of exhaust by diffusing a vapor-like medium by heating and generating a jet flow by injection. The first heat medium 31 is exhaust gas 99. The second heat medium 32 may be fuel 98. In this example, the second heat medium 32 is fuel 98. The first temperature of the first heat medium 31 is set to first temperature T1. The second temperature of the second heat medium 32 is set to second temperature T2.

[0026] The separation unit 10 separates the exhaust gas 99 into a permeable component containing CO2 (carbon dioxide) and an impermeable component. The permeable component is denoted as permeable component Tc. The impermeable component is denoted as impermeable component Nc. The CO2 (carbon dioxide) concentration of impermeable component Nc is lower than that of permeable component Tc. Details of the separation unit 10 will be described later.

[0027] 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 separation material 14 is formed in a hollow fiber shape.

[0028] 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 99 that permeated through the separation material 14. The non-permeable component Nc is the component of the exhaust gas 99 that did not permeate through the separation material 14.

[0029] 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 99. 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.

[0030] 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.

[0031] Inorganic materials tend to have higher heat resistance than organic materials. Therefore, in terms of heat resistance to the heat of exhaust gas 99, 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.

[0032] Figure 4 shows an example of the details of the control pump 20. The control pump 20 in this example is an oil diffusion type vacuum pump. The control pump 20 in this example has oil 21, a heater 22, an intake port 23, an exhaust port 26, side walls 24, an oil storage section 25, and an internal space 27. The internal space 27 is the area enclosed by the side walls 24. In this example, the intake port 23 draws in the permeate component Tc, and the exhaust port 26 exhausts the permeate component Tc.

[0033] The heater 22 heats the oil 21, causing it to vaporize. The control pump 20 diffuses the vaporized oil 21 into the internal space 27, thereby exhausting the gas (in this example, the permeate component Tc). The control pump 20 cools the diffused vaporized oil 21, causing it to liquefy. In this example, the control pump 20 liquefies the vaporized oil 21 by directing it against the side wall 24.

[0034] The oil 21 may be heated by the first heat transfer medium 31. The oil 21 may be heated by the heater 22 and the first heat transfer medium 31. This tends to reduce the power consumption of the control pump 20 compared to when the oil 21 is not heated by the first heat transfer medium 31. The oil 21 may be cooled by the second heat transfer medium 32. The second heat transfer medium 32 may cool the vaporized oil 21 by cooling the side wall 24. This tends to reduce the power consumption of the control pump 20 compared to when the oil 21 is not cooled by the second heat transfer medium 32.

[0035] As described above, the first heat transfer medium 31 is exhaust gas 99. The temperature of the exhaust gas 99 is, for example, between 200°C and 400°C. Therefore, the first heat transfer medium 31 can heat the oil 21. The second heat transfer medium 32 is, as will be described later, for example, LNG (Liquefied Natural Gas). The boiling point of LNG is -161.5°C. Therefore, when the second heat transfer medium 32 is LNG, the second heat transfer medium 32 can cool the oil 21.

[0036] On ships, there may be limitations on the available power. When the exhaust gas treatment device 100 is installed on a ship, it is preferable that the power consumption of the exhaust gas treatment device 100 is small. In the exhaust gas treatment device 100, the control pump 20 controls the pressure of the permeate component Tc based on the temperature difference between the first temperature T1 of the first heat medium 31 and the second temperature T2 of the second heat medium 32. Therefore, the power consumption of the exhaust gas treatment device 100 tends to be smaller than when the pressure of the permeate component Tc is controlled without regard to the temperature difference between the first temperature T1 and the second temperature T2.

[0037] The control pump 20 may reduce the pressure of the permeate component Tc. The performance of the separation unit 10 (see Figure 1) in separating CO2 (carbon dioxide) is highly dependent on the ratio of the pressure of the exhaust gas 99 supplied to the separation unit 10 to the pressure of the permeate component Tc. Let the pressure of the exhaust gas 99 supplied to the separation unit 10 be pressure P1. Let the pressure of the permeate component Tc be pressure P2. The performance of the separation unit 10 (see Figure 1) in separating CO2 (carbon dioxide) tends to be higher as the ratio of pressure P2 to pressure P1 (i.e., P2 / P1) decreases.

[0038] In this example, the control pump 20 reduces the pressure of the permeate component Tc. This makes it easier to reduce the ratio of pressure P2 to pressure P1. As a result, the separation unit 10 (see Figure 1) can easily improve its performance in separating CO2 (carbon dioxide).

[0039] The first heat transfer medium 31 may be the exhaust gas 99 separated by the separation unit 10. The exhaust gas 99 separated by the separation unit 10 may refer to the exhaust gas 99 before separation by the separation unit 10 (see Figure 1). At least a portion of the first heat transfer medium 31 may be supplied to the control pump 20. In Figure 1, this supply path is indicated by a dashed arrow.

[0040] At least a portion of the first heat transfer medium 31 supplied to the control pump 20 may be supplied to at least another portion of the first heat transfer medium 31. In Figure 1, this supply path is indicated by a dashed arrow. In this example, at least another portion of the first heat transfer medium 31 is the exhaust gas 99 (first heat transfer medium 31) discharged from the exhaust gas source 90, excluding the first heat transfer medium 31 supplied to the control pump 20.

[0041] At least a portion of the second heat transfer medium 32 may be supplied to the control pump 20. In Figure 1, this supply path is indicated by a dashed-dotted arrow. At least a portion of the second heat transfer medium 32 supplied to the control pump 20 may be supplied to at least another portion of the second heat transfer medium 32. In Figure 1, this supply path is indicated by a dashed-dotted arrow. In this example, at least another portion of the second heat transfer medium 32 is the second heat transfer medium 32 remaining after deducting the portion supplied to the control pump 20 from the fuel 98 (second heat transfer medium 32) supplied from the fuel tank 94.

[0042] The exhaust gas treatment device 100 may control at least one of the timing at which the first heat medium 31 is supplied to the control pump 20 and the flow rate of the first heat medium 31 by controlling valve 92 (see Figure 1). The flow rate of the first heat medium 31 may be the mass or volume of the first heat medium 31 flowing per unit time. The exhaust gas treatment device 100 may control at least one of the timing at which the second heat medium 32 is supplied to the control pump 20 and the flow rate of the second heat medium 32 by controlling valve 93 (see Figure 1). The flow rate of the second heat medium 32 may be the mass or volume of the second heat medium 32 flowing per unit time.

[0043] The cooling device 30 (see Figure 1) may cool the first heat transfer medium 31. The cooling device 30 may cool the exhaust gas 99 (first heat transfer medium 31) supplied to the separation unit 10 (see Figure 1). The exhaust gas 99 supplied to the separation unit 10 may refer to the exhaust gas 99 before it is supplied to the separation unit 10. As described above, the heat resistance of organic materials tends to be lower than that of inorganic materials. For this reason, when the separation unit 10 (see Figure 1) has an organic separation material 14 (see Figures 2 and 3), it is preferable that the temperature of the exhaust gas 99 (first heat transfer medium 31) supplied to the separation unit 10 is lower than the temperature of the exhaust gas 99 immediately after it is discharged from the exhaust gas source 90.

[0044] In this example, the cooling device 30 (see Figure 1) cools the first heat transfer medium 31. Therefore, even if the separation unit 10 (see Figure 1) has an organic material separation material 14 (see Figures 2 and 3), the separation unit 10 can easily separate the exhaust gas 99 into a permeable component Tc and an impermeable component Nc.

[0045] The induction device 91 (see Figure 1) induces the exhaust gas 99 into the separation unit 10. The induction device 91 may be a so-called induction blower. The pressure of the exhaust gas 99 after induction by the induction device 91 tends to be higher than the pressure of the exhaust gas 99 before induction by the induction device 91. Therefore, the induction of the exhaust gas 99 by the induction device 91 tends to reduce the ratio of pressure P2 to pressure P1 mentioned above. For this reason, it is preferable that the exhaust gas 99 supplied to the separation unit 10 is the exhaust gas 99 that has been induced by the induction device 91.

[0046] The vaporizer 40 (see Figure 1) vaporizes the fuel 98 (see Figure 1). The fuel 98 is, for example, LNG. When the fuel 98 is LNG, the exhaust gas source 90 operates using the vaporized fuel 98. When the fuel 98 is LNG, liquid LNG may be stored in the fuel tank 94.

[0047] The fuel 98 (see Figure 1) supplied to the control pump 20 (see Figure 1) may be supplied to the fuel 98 that is vaporized by the vaporizer 40 (see Figure 1). The fuel 98 that is vaporized by the vaporizer 40 may refer to the fuel 98 before it is vaporized by the vaporizer 40.

[0048] The second heat transfer medium 32 (fuel 98 in this example) supplied to the control pump 20 can be heated by the oil 21 (see Figure 4). A portion of the liquid oil 21 can vaporize upon heating. In the example in Figure 1, the liquid oil 21 from the heated oil 21 is supplied to the fuel 98 which is vaporized by the vaporizer 40.

[0049] Figure 5 shows another example of an exhaust gas treatment device 100 according to one embodiment of the present invention. The exhaust gas treatment device 100 in this example differs from the exhaust gas treatment device 100 shown in Figure 1 in that it further comprises a gas-liquid separator 42. The gas-liquid separator 42 separates the fuel 98 supplied to the control pump 20 into gas and liquid.

[0050] The fuel 98 supplied to the control pump 20 may be supplied to the fuel 98 vaporized by the vaporizer 40. The fuel 98 vaporized by the vaporizer 40 may refer to the fuel 98 after it has been vaporized by the vaporizer 40.

[0051] The gaseous fuel 98 separated by the gas-liquid separator 42 may be supplied to the fuel 98 vaporized by the vaporizer 40. The liquid fuel 98 separated by the gas-liquid separator 42 may be supplied to the fuel 98 vaporized by the vaporizer 40.

[0052] Figure 6 shows another example of an exhaust gas treatment device 100 according to one embodiment of the present invention. The exhaust gas treatment device 100 in this example further includes an induction pump 89. In this example, the cooling device 30 cools the first heat medium 31 with a second heat medium 32. The exhaust gas treatment device 100 in this example differs from the exhaust gas treatment device 100 shown in Figure 5 in these respects.

[0053] The induction pump 89 guides the fuel 98 (second heat transfer medium 32) to the control pump 20 and the cooling device 30. A portion of the fuel 98 guided by the induction pump 89 may be supplied to the control pump 20. Another portion of the fuel 98 guided by the induction pump 89 may be supplied to the cooling device 30.

[0054] The cooling device 30 may be a heat exchanger. When the cooling device 30 is a heat exchanger, the cooling device 30 cools the first heat medium 31 (exhaust gas 99) by exchanging heat between the heat of the first heat medium 31 and the heat of the second heat medium 32. In this example, since the cooling device 30 cools the first heat medium 31 with the second heat medium 32, the exhaust gas treatment device 100 can effectively utilize the heat of the second heat medium 32. The fuel 98 (second heat medium 32) that has exchanged heat with the first heat medium 31, and the fuel 98 supplied to the control pump 20, may be supplied to the gas-liquid separator 42.

[0055] Figure 7 shows another example of an exhaust gas treatment device 100 according to one embodiment of the present invention. In this example, the fuel 98 (second heat transfer medium 32) induced by the induction pump 89 is supplied to the cooling device 30, and the fuel 98 (second heat transfer medium 32) that has undergone heat exchange with the first heat transfer medium 31 in the cooling device 30 is supplied to the control pump. That is, in this example, the fuel 98 (second heat transfer medium 32) induced by the induction pump 89 passes through the cooling device 30 and the control pump 20 in that order. This example differs from the example shown in Figure 6 in this respect.

[0056] In this example, all of the fuel 98 induced by the induction pump 89 is supplied to the cooling device 30, thus simplifying the fuel 98 supply path compared to the example shown in Figure 6. Alternatively, the fuel 98 (second heat transfer medium 32) induced by the induction pump 89 may be supplied to the control pump 20, and the fuel 98 supplied to the control pump 20 may be supplied to the cooling device 30. That is, the fuel 98 (second heat transfer medium 32) induced by the induction pump 89 may pass through the control pump 20 and the cooling device 30 in that order.

[0057] Figure 8 shows another example of an exhaust gas treatment device 100 according to one embodiment of the present invention. The exhaust gas treatment device 100 in this example further comprises a heating device 39 and a circulation pump 88, but does not include a gas-liquid separator 42. In this example, the second heat transfer medium 32 is not fuel 98. The exhaust gas treatment device 100 in this example differs from the exhaust gas treatment device 100 shown in Figure 6 in these respects.

[0058] The circulation pump 88 supplies the second heat transfer medium 32 to at least one of the cooling device 30 and the control pump 20. In this example, the circulation pump 88 supplies the second heat transfer medium 32 to both the cooling device 30 and the control pump 20. The circulation pump 88 sucks the second heat transfer medium 32 supplied to at least one of the cooling device 30 and the control pump 20. In this example, the circulation pump 88 sucks the second heat transfer medium 32 supplied to both the cooling device 30 and the control pump 20. In this example, the circulation pump 88 circulates the second heat transfer medium 32 between the heating device 39 and the cooling device 30, and also between the heating device 39 and the control pump 20.

[0059] The heating device 39 heats the fuel 98 with the second heat transfer medium 32. The heating device 39 may be a heat exchanger. If the heating device 39 is a heat exchanger, the heating device 39 exchanges heat between the heat of the second heat transfer medium 32 and the heat of the fuel 98.

[0060] The heating device 39 may heat the fuel 98 vaporized by the vaporizer 40 with the second heat transfer medium 32 supplied to the control pump 20. The fuel 98 vaporized by the vaporizer 40 may refer to the fuel 98 before it is vaporized by the vaporizer 40. The second heat transfer medium 32 supplied to the control pump 20 may refer to the second heat transfer medium 32 after it has been supplied to the control pump 20. If the control pump 20 is an oil diffusion type vacuum pump, the second heat transfer medium 32 supplied to the control pump 20 cools the oil 21 (see Figure 4). Therefore, the amount of heat in the second heat transfer medium 32 supplied to the control pump 20 tends to be greater than the amount of heat in the second heat transfer medium 32 before it is supplied to the control pump 20. Therefore, the second heat transfer medium 32 supplied to the control pump 20 can heat the fuel 98. Therefore, the vaporizer 40 can vaporize the fuel 98 more easily than if the heating device 39 did not heat the fuel 98.

[0061] Figure 9 shows another example of an exhaust gas treatment device 100 according to one embodiment of the present invention. In the exhaust gas treatment device 100 of this example, the first heat transfer medium 31 is an impermeable component Nc. This example differs from the exhaust gas treatment device 100 shown in Figure 1 in this respect. In this example, the impermeable component Nc is supplied to the control pump 20. The impermeable component Nc supplied to the control pump 20 may be supplied to the exhaust gas 99. The impermeable component Nc supplied to the control pump 20 may be supplied to the exhaust gas 99 supplied to the cooling device 30. In this example, since the impermeable component Nc is induced by the induction device 91, the pressure of the impermeable component Nc tends to be higher than the pressure of the exhaust gas 99 before it is introduced into the induction device 91. For this reason, it is easier to supply the impermeable component Nc to the control pump 20.

[0062] Figure 10 shows another example of an exhaust gas treatment device 100 according to one embodiment of the present invention. The exhaust gas treatment device 100 in this example further comprises a denitrification device 35, a dust removal device 36, and a desulfurization device 37. In this example, the second heat transfer medium 32 is seawater. This example differs from the exhaust gas treatment device 100 shown in Figure 1 in these respects.

[0063] When the exhaust gas treatment device 100 in this example is installed on a ship, the second heat transfer medium 32 may be seawater. The fuel 98 may be heavy oil. The fuel 98 may be C heavy oil.

[0064] If the fuel 98 is heavy oil, the exhaust gas 99 emitted from the exhaust gas source 90 may contain nitrogen oxides (NOx). The denitrification device 35 removes at least a portion of the nitrogen oxides (NOx) contained in the exhaust gas 99 from the exhaust gas 99.

[0065] When the fuel 98 is heavy oil, the exhaust gas 99 emitted from the exhaust gas source 90 may contain particulate matter (PM). The dust removal device 36 removes at least a portion of the particulate matter (PM) contained in the exhaust gas 99. The dust removal device 36 may be an electrostatic precipitator.

[0066] When the fuel 98 is heavy oil, the exhaust gas 99 emitted from the exhaust gas source 90 may contain sulfur oxides (SOx). The desulfurization unit 37 removes at least a portion of the sulfur oxides (SOx) contained in the exhaust gas 99 from the exhaust gas 99. The desulfurization unit 37 may be a so-called scrubber.

[0067] In this example, the induction pump 89 guides the second heat transfer medium 32 (seawater in this example) to the cooling device 30 and the control pump 20. A portion of the second heat transfer medium 32 guided by the induction pump may be supplied to the control pump 20. Another portion of the second heat transfer medium 32 guided by the induction pump may be supplied to the cooling device 30.

[0068] 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.

[0069] 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]

[0070] 10...Separation section, 12...Base material, 14...Separation material, 20...Control pump, 21...Oil, 22...Heater, 23...Air intake, 24...Side wall, 25...Oil storage section, 26...Exhaust port, 27...Internal space, 30...Cooling device, 31...First heat transfer fluid, 32...Second heat transfer fluid, 35...Denitrification device, 36...Dust removal Equipment, 37...Desulfurization equipment, 39...Heating equipment, 40...Vaporizer, 42...Gas-liquid separator, 88...Circulation pump, 89...Induction pump, 90...Exhaust gas source, 91...Induction pump, 92...Valve, 93...Valve, 94...Fuel tank, 98...Fuel, 99...Exhaust gas, 100...Exhaust gas treatment equipment

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 control pump, which is a vacuum pump, sucks in and exhausts the permeate component based on the temperature difference between the first temperature of the first heat transfer medium and the second temperature of the second heat transfer medium, thereby reducing the pressure of the permeate component. Equipped with, The control pump is a diffusion-type vacuum pump that heats the medium with the first heat transfer medium and cools the medium with the second heat transfer medium. The first heat transfer medium is the exhaust gas. Exhaust gas treatment device.

2. The exhaust gas treatment apparatus according to claim 1, wherein the first heat transfer medium is the exhaust gas separated by the separation unit.

3. The exhaust gas treatment apparatus according to claim 1, wherein the first heat transfer medium is the non-permeable component.

4. At least a portion of the second heat transfer medium is supplied to the control pump. At least a portion of the second heat transfer medium supplied to the control pump is supplied to at least another portion of the second heat transfer medium. The exhaust gas treatment apparatus according to any one of claims 1 to 3.

5. The exhaust gas treatment apparatus according to claim 4, further comprising a cooling device for cooling the first heat transfer medium.

6. The exhaust gas treatment apparatus according to claim 5, wherein the cooling device cools the first heat medium with the second heat medium.

7. The exhaust gas treatment apparatus according to claim 5 or 6, wherein the second heat transfer medium is the fuel for the exhaust gas source.

8. The device further comprises a vaporizer for vaporizing the aforementioned fuel, The fuel supplied to the control pump is supplied to the fuel that is vaporized by the vaporizer. The exhaust gas treatment apparatus according to claim 7.

9. The device further comprises a vaporizer for vaporizing the aforementioned fuel, The fuel supplied to the control pump is supplied to the fuel vaporized by the vaporizer. The exhaust gas treatment apparatus according to claim 7.

10. The system further comprises a gas-liquid separation device that separates the fuel supplied to the control pump into gas and liquid. The gaseous fuel separated by the gas-liquid separator is supplied to the fuel vaporized by the vaporizer. The liquid fuel separated by the gas-liquid separator is supplied to the fuel that is vaporized by the vaporizer. The exhaust gas treatment apparatus according to claim 8 or 9.

11. The exhaust gas treatment apparatus according to claim 5 or 6, further comprising a heating device for heating the fuel of the exhaust gas source with the second heat transfer medium.

12. The device further comprises a vaporizer for vaporizing the aforementioned fuel, The heating device heats the fuel vaporized by the vaporizer with the second heat transfer medium supplied to the control pump. The exhaust gas treatment apparatus according to claim 11.

13. The exhaust gas treatment apparatus according to any one of claims 5, 6, 11, and 12, further comprising a circulation pump that supplies the second heat medium to at least one of the cooling device and the control pump, and sucks the second heat medium supplied to at least one of the cooling device and the control pump.

14. The exhaust gas treatment apparatus according to claim 5 or 6, wherein the second heat transfer medium is seawater.

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