Exhaust gas treatment device

Abstract

The present invention discloses an exhaust gas treatment device. The exhaust gas treatment device according to an embodiment of the present invention includes: a gas-liquid reactor, which makes a treatment liquid contact with an emission-restricted gas contained in the exhaust gas to absorb and remove the emission-restricted gas; a treatment liquid supply tank, which supplies the treatment liquid to the gas-liquid reactor; and a gas-liquid separation treatment liquid regeneration unit, which regenerates the waste treatment liquid that absorbs the emission-restricted gas into a treatment liquid that does not absorb the emission-restricted gas, and supplies the regenerated treatment liquid to the treatment liquid supply tank, the gas-liquid separation treatment liquid regeneration unit includes a gas-liquid separation membrane through which gas can pass but liquid cannot pass, the gas-liquid separation membrane separates a liquid flow channel through which the waste treatment liquid flows from a gas flow channel through which the emission-restricted gas flows, and the emission-restricted gas absorbed in the waste treatment liquid flows through the liquid flow channel and passes through the gas-liquid separation membrane, and moves to a gas flow channel formed with a low partial pressure of the emission-restricted gas to separate the emission-restricted gas and the treatment liquid.

Description

Technical Field

[0001] The invention relates to an exhaust gas treatment device for treating exhaust gas. Background Art

[0002] As the regulation of exhaust gas emitted by ships becomes increasingly stringent, it is necessary to remove not only sulfur oxides but also carbon dioxide from exhaust gas emitted by ships.

[0003] In order to treat the exhaust gas, an exhaust gas treatment device may be installed on the ship, and the exhaust gas treatment device may treat the exhaust gas by spraying a treatment liquid into the exhaust gas. In the exhaust gas treatment device, seawater may be used as the treatment liquid. If such seawater is used as the treatment liquid, sulfur oxides may be removed from the exhaust gas. However, since only a small amount of carbon dioxide can be removed, it is difficult to achieve carbon dioxide emission reduction performance that complies with the Energy Efficiency Design Index of the International Maritime Organization under the United Nations (UN). In addition, since a relatively large amount of seawater may be required to treat the exhaust gas, facilities for supplying and spraying a large amount of seawater may be required.

[0004] In addition, as the treatment liquid of the exhaust gas treatment device, an alkaline aqueous solution such as an aqueous sodium hydroxide solution can also be used. Although the exhaust gas can be treated with a small amount of alkaline aqueous solution, the cost may be very high. In order to reduce costs, in the exhaust gas treatment device, the waste treatment liquid that has treated the exhaust gas can be regenerated and reused. However, in conventional exhaust gas treatment devices, the regeneration rate of the waste treatment liquid may be low. Therefore, it is necessary to continuously supply the treatment agent to the regenerated treatment liquid, so the cost is not significantly reduced. In addition, the equipment for regenerating the waste treatment liquid may be a large-scale equipment suitable for some land, and it is difficult to apply it to ships with exhaust gas treatment devices. Summary of the invention

[0005] Technical issues

[0006] The present invention is made based on the recognition of at least one of the needs or problems arising in the prior art as described above.

[0007] One aspect of the present invention is to reduce the cost of treating exhaust gas in an exhaust gas treatment device.

[0008] Another aspect of the present invention is to increase the regeneration rate of spent process fluid that has been used to treat waste gas.

[0009] Another aspect of the present invention is to reduce the size of the exhaust treatment device.

[0010] Another aspect of the present invention is to separate the emission-restricted gas from the waste treatment liquid that absorbs the emission-restricted gas contained in the exhaust gas, and to treat the emission-restricted gas by dissolving the emission-restricted gas in an environmentally friendly ion state in seawater.

[0011] Technical Solution

[0012] An exhaust gas treatment device according to an embodiment for achieving at least one of the above-mentioned problems may include the following features.

[0013] According to one aspect of the present invention, the exhaust gas treatment device includes: a gas-liquid reactor, which brings the treatment liquid into contact with the emission-restricted gas contained in the exhaust gas to absorb and remove the emission-restricted gas; a treatment liquid supply tank, which supplies the treatment liquid to the gas-liquid reactor; and a gas-liquid separation treatment liquid regeneration unit, which regenerates the waste treatment liquid that has absorbed the emission-restricted gas into a treatment liquid that has not absorbed the emission-restricted gas, and supplies the regenerated treatment liquid to the treatment liquid supply tank, the gas-liquid separation treatment liquid regeneration unit includes a gas-liquid separation membrane through which gas can pass but liquid cannot pass, the gas-liquid separation membrane separates the liquid flow channel through which the waste treatment liquid flows from the gas flow channel through which the emission-restricted gas flows, the emission-restricted gas absorbed in the waste treatment liquid flows through the liquid flow channel and passes through the gas-liquid separation membrane, and moves to the gas flow channel where a low partial pressure of the emission-restricted gas is formed to separate the emission-restricted gas and the treatment liquid.

[0014] In this case, the waste process liquid discharge pipe connected to the gas-liquid reactor may be connected to one side of the liquid flow channel, and the other side of the liquid flow channel may be connected to the process liquid supply tank through the process liquid recovery pipe.

[0015] In addition, the waste process liquid discharge pipe may include a filtering treatment unit to filter pollutants other than the discharge restriction gas contained in the waste process liquid.

[0016] In addition, a gas recovery pipe provided with a vacuum pump may be connected to one side of the gas flow channel to form a low partial pressure of the emission restriction gas in the gas flow channel.

[0017] In addition, an intake pipe provided with a flow control valve may be connected to the other side of the gas flow passage to control the partial pressure of the emission restriction gas formed in the gas flow passage.

[0018] Furthermore, the gas-liquid separation membrane may be a hollow fiber membrane formed with the gas flow channel or the liquid flow channel.

[0019] In addition, the gas-liquid reactor may include: a housing connected to the exhaust gas discharge device; and a treatment liquid injection unit injecting the treatment liquid into the exhaust gas flowing through the housing.

[0020] In addition, the treatment liquid spraying unit may include: a treatment liquid flow pipe connected to the treatment liquid supply tank, passing through one surface of the shell, and disposed in the shell; and a treatment liquid nozzle disposed at a portion of the treatment liquid flow pipe disposed in the shell.

[0021] In addition, a heat exchanger may be connected to the process liquid supply tank to cool the process liquid stored in the process liquid supply tank.

[0022] In addition, the emission-restricted gas may be sulfur oxide or carbon dioxide, and the treatment liquid may be seawater or an alkaline aqueous solution.

[0023] According to another aspect of the present invention, the exhaust gas treatment device includes: a gas-liquid reactor, which contacts the exhaust gas and the treatment liquid to absorb and remove the emission restriction gas contained in the exhaust gas in the treatment liquid; a gas-liquid separation treatment liquid regeneration unit, which separates the emission restriction gas from the waste treatment liquid that absorbs the emission restriction gas and is discharged from the gas-liquid reactor to regenerate the waste treatment liquid into the treatment liquid; and a gas treatment unit, which treats the emission restriction gas separated from the gas-liquid separation treatment liquid regeneration unit, wherein the gas treatment unit dissolves the emission restriction gas in an environmentally friendly ionic state and treats it in seawater.

[0024] In this case, the gas processing unit may include a seawater flow pipe, in which seawater flows, and the seawater flow pipe is connected to a gas recovery pipe connected to the gas-liquid separation treatment liquid regeneration unit.

[0025] In addition, the portion where the seawater flow pipe is connected to the gas recovery pipe may be branched into a plurality of branch portions, and the gas recovery pipe may be branched and connected to the plurality of branch portions of the seawater flow pipe, respectively.

[0026] In addition, a pressure control valve may be provided in the seawater flow pipe to increase the pressure of the seawater flowing through the seawater flow pipe.

[0027] In addition, the gas processing unit may further include a micro bubble generator disposed in the seawater flow pipe to be connected to the gas recovery pipe.

[0028] Furthermore, a plurality of micropores may be formed in the microbubble generator.

[0029] In addition, the gas processing unit may further include a gas mixer provided in a portion of the seawater flow pipe adjacent to the microbubble generator in the flow direction of the seawater to mix the seawater and the discharge restricting gas.

[0030] In addition, in the gas-liquid separation treatment liquid regeneration unit, the gas-liquid separation membrane through which the emission-restricted gas can pass but the waste treatment liquid cannot pass can separate the liquid flow channel through which the waste treatment liquid flows from the gas flow channel through which the emission-restricted gas flows, and form a low partial pressure of the emission-restricted gas in the gas flow channel, so that the emission-restricted gas contained in the waste treatment liquid in the liquid flow channel moves to the gas flow channel through the gas-liquid separation membrane.

[0031] In addition, a treatment liquid supply tank which supplies the treatment liquid to the gas-liquid reactor and stores the treatment liquid regenerated in the gas-liquid separation treatment liquid regeneration unit may be further included.

[0032] Beneficial effects

[0033] As described above, according to the embodiments of the present invention, the waste process liquid can be regenerated by the gas-liquid separation process liquid regeneration unit which separates the emission-restricted gas from the waste process liquid that has treated the exhaust gas.

[0034] In addition, according to the embodiments of the present invention, the regeneration rate of the waste treatment liquid that has treated the waste gas can be improved.

[0035] Furthermore, according to the embodiments of the present invention, the cost for treating exhaust gas in the exhaust gas treatment device can be reduced.

[0036] In addition, according to the embodiment of the present invention, the size of the exhaust gas treatment device can be reduced.

[0037] Furthermore, according to the embodiments of the present invention, the emission restriction gas can be separated from the waste treatment liquid that absorbs the emission restriction gas contained in the exhaust gas, and the separated emission restriction gas can be processed by dissolving the emission restriction gas in the environmentally friendly ion state in seawater. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a view showing a first embodiment of an exhaust gas treatment device according to the present invention.

[0039] Figure 2 is a view showing another example of the gas-liquid separation treatment liquid regeneration unit according to the first embodiment of the exhaust gas treatment device of the present invention.

[0040] Figure 3 1 is a view showing an example of a gas processing unit of a first embodiment of the exhaust gas processing device according to the present invention.

[0041] Figure 4 is a view showing another example of the gas processing unit of the first embodiment of the exhaust gas processing device according to the present invention.

[0042] Figure 5is a view showing a second embodiment of the exhaust gas treatment device according to the present invention.

[0043] Figure 6 is a view showing a third embodiment of the exhaust gas treatment device according to the present invention.

[0044] Figure 7 1 is a view showing a fourth embodiment of the exhaust gas treatment device according to the present invention. DETAILED DESCRIPTION

[0045] In order to help understand the features of the present invention as described above, an exhaust gas treatment device for treating exhaust gas will be described in more detail below.

[0046] Below, the embodiment that is most suitable for helping to understand the technical features of the present invention will be described. The technical features of the present invention are not limited by the described embodiments, but only illustrate the implementation of the present invention through the embodiments described below. Therefore, through the embodiments described below, the present invention can be variously modified within the scope of the present invention, and these modifications are also within the scope of the present invention. In order to help understand the embodiments described below, in each embodiment in the accompanying drawings, the same or similar reference numerals are used for related components in components with the same function.

[0047] First embodiment of the exhaust gas treatment device

[0048] Below, refer to Figures 1 to 4 A first embodiment of the exhaust gas treatment device of the present invention will be described.

[0049] Figure 1 is a view showing a first embodiment of an exhaust gas treatment device according to the present invention, Figure 2 is a view showing another example of the gas-liquid separation treatment liquid regeneration unit according to the first embodiment of the exhaust gas treatment device of the present invention.

[0050] Figure 3 is a view showing an example of a gas processing unit of a first embodiment of an exhaust gas processing device according to the present invention, Figure 4 is a view showing another example of the gas processing unit of the first embodiment of the exhaust gas processing device according to the present invention.

[0051] The first embodiment of the exhaust gas treatment device according to the present invention may include a gas-liquid reactor 200 , a treatment liquid supply tank 300 , and a gas-liquid separation treatment liquid regeneration unit 400 .

[0052] Exhaust gas discharged from exhaust gas emission equipment (not shown) such as engines, boilers, etc. can be introduced into the gas-liquid reactor 200 and flow therein. In addition, the gas-liquid reactor 200 can contact the exhaust gas with the treatment liquid to absorb and remove the emission restriction gas contained in the exhaust gas through the treatment liquid. The emission restriction gas can be, for example, sulfur oxides or carbon dioxide. Any type of gas that is discharged into the atmosphere and should be restricted can be provided as an emission restriction gas, such as nitrogen oxides. The gas-liquid reactor 200 may include a housing 210 and a treatment liquid injection unit 220.

[0053] The housing 210 may be connected to an exhaust gas discharge device. The housing 210 may be provided with an inlet 211, an outlet 212, and an exhaust port 213. Figure 1 As shown, the inlet 211 may be provided on the lower side surface of the housing 210, the outlet 212 may be provided on the upper surface of the housing 210, and the discharge port 213 may be provided on the lower surface of the housing 210. The portion of the housing 210 provided with the inlet 211, the outlet 212 or the discharge port 213 is not particularly limited.

[0054] The inlet 211 may be connected to an exhaust gas discharge device. Thus, the exhaust gas discharged from the exhaust gas discharge device may be discharged by Figure 1 The inlet 211 shown is introduced into the housing 210 and can flow in the housing 210 .

[0055] like Figure 1 As shown, the treatment liquid can be sprayed into the housing 210 by the treatment liquid spraying unit 220. Therefore, the exhaust gas introduced into the housing 210 and flowing therein can contact with the treatment liquid. In this way, when the exhaust gas contacts the treatment liquid, the emission-restricted gas such as sulfur oxides or carbon dioxide contained in the exhaust gas can be absorbed by the treatment liquid and can be removed from the exhaust gas. The exhaust gas from which the emission-restricted gas has been removed can be discharged through the outlet 212. In addition, the waste treatment liquid can be discharged through the discharge port 213, and the waste treatment liquid can be the treatment liquid that absorbs the emission-restricted gas.

[0056] A packing 230 may be provided in the housing 210. The packing 230 may increase the contact area and contact time between the exhaust gas and the treatment liquid. Therefore, the treatment efficiency of the treatment liquid on the exhaust gas may be improved. The packing 230 may include a plurality of components having a plurality of holes formed therein. Instead of the packing 230, a structure that increases the contact area and contact time between the exhaust gas and the treatment liquid, such as the packing 230, may be provided in the housing 210.

[0057] The shell 210 may have a rectangular cross section. The shell 210 may be installed in a chimney (not shown) of, for example, a ship (not shown). The chimney of a ship may have a rectangular cross section. In addition, as described above, if the shell 210 has a rectangular cross section, when the shell 210 is installed in the chimney of a ship having a rectangular cross section, the dead zone, i.e., the space that cannot be used, can be minimized. When the shell 210 is installed in the chimney of a ship, the chimney may extend in a direction facing the bow or stern of the ship, for example. When the cross section of the shell 210 has a rectangular shape, when installed in the chimney of a ship having a rectangular cross section as described above, the dead zone can be minimized, so that the expansion area of ​​the chimney for installing the shell 210 can be minimized. Therefore, the shell 210 can be easily installed in the chimney of the ship, time, materials, etc. for installing the shell 210 in the chimney can be saved, and the space utilization rate of the ship can be improved.

[0058] The treatment liquid spraying unit 220 may spray the treatment liquid into the exhaust gas flowing in the housing 210. The treatment liquid spraying unit 220 may include a treatment liquid flow pipe 221 and a treatment liquid nozzle 222.

[0059] The process liquid flow pipe 221 may be connected to the process liquid supply tank 300. Figure 1 As shown, the treatment liquid flow pipe 221 can be connected to the treatment liquid supply tank 300 through the treatment liquid supply pipe LP. The treatment liquid supply pump PP can be provided in the treatment liquid supply pipe LP. In addition, when the treatment liquid supply pump PP is driven, the treatment liquid stored in the treatment liquid supply tank 300 can flow through the treatment liquid flow pipe 221.

[0060] The treatment liquid flow pipe 221 may pass through one surface of the housing 210 and may be disposed in the housing 210. In addition, the treatment liquid nozzle 222 may be disposed in a portion of the treatment liquid flow pipe 221 disposed in the housing 210. Figure 1 As shown, the treatment liquid flowing through the treatment liquid flow pipe 221 may be sprayed into the exhaust gas flowing in the housing 210 through the treatment liquid nozzle 222 .

[0061] The treatment liquid supply tank 300 can supply the treatment liquid to the gas-liquid reactor 200. The treatment liquid can be stored in the treatment liquid supply tank 300. The treatment liquid stored in the treatment liquid supply tank 300 can be, for example, seawater or an alkaline aqueous solution, such as a sodium hydroxide aqueous solution, etc. However, the treatment liquid stored in the treatment liquid supply tank 300 is not particularly limited, and the treatment liquid can be any known substance as long as it can be sprayed into the exhaust gas to contact with the exhaust gas and absorb the emission restriction gas contained in the exhaust gas, and can be regenerated by separating the emission restriction gas in the gas-liquid separation treatment liquid regeneration unit 400.

[0062] like Figure 1As shown, one side of the process liquid supply pipe LP may be connected to the process liquid supply tank 300, and the other side of the process liquid supply pipe LP may be connected to the process liquid flow pipe 221 of the process liquid spraying unit 220. In addition, when the process liquid supply pump PP of the process liquid supply pipe LP is driven, the process liquid in the process liquid supply tank 300 may be supplied to the process liquid spraying unit 220 through the process liquid supply pipe LP.

[0063] One side of the process liquid recovery pipe LR may be connected to the process liquid supply tank 300. The other side of the process liquid recovery pipe LR may be connected to the gas-liquid separation process liquid regeneration unit 400. Figure 1 As shown, the process liquid regenerated in the gas-liquid separation process liquid regeneration unit 400 may be supplied through the process liquid recovery pipe LR and stored in the process liquid supply tank 300 .

[0064] like Figure 1 As shown, the treatment agent supply tank 600 can be connected to the treatment liquid recovery pipe LR through the treatment agent supply pipe LT. Therefore, the treatment agent stored in the treatment agent supply tank 600, such as an alkaline agent such as sodium hydroxide, can be supplied to the regenerated treatment liquid flowing in the treatment liquid recovery pipe LR through the treatment agent supply pipe LT. Figure 5 As shown, the treating agent supply pipe LT may be connected to the treating liquid supply tank 300 without being connected to the treating liquid recovery pipe LR to supply the treating agent stored in the treating agent supply tank 600 to the treating liquid stored in the treating liquid supply tank 300 .

[0065] like Figure 1 As shown, the heat exchanger HE can be connected to the treatment liquid supply tank 300, and the heat exchanger HE can perform heat exchange with the treatment liquid stored in the treatment liquid supply tank 300 to cool the treatment liquid to a temperature that can relatively well absorb the emission restriction gas contained in the exhaust gas. The treatment liquid can absorb the emission restriction gas contained in the exhaust gas in the gas-liquid reactor 200 to become a waste treatment liquid, and its temperature can be increased due to the exhaust gas with a high temperature. In this way, when the waste treatment liquid having a temperature higher than the temperature of the treatment liquid before being sprayed into the gas-liquid reactor 200 is regenerated in the gas-liquid separation treatment liquid regeneration unit 400, the temperature of the regenerated treatment liquid will also be higher than the temperature of the treatment liquid before being sprayed into the gas-liquid reactor 200. When the treatment liquid heated in this way is supplied to the treatment liquid supply tank 300, the temperature of the treatment liquid stored in the treatment liquid supply tank 300 will increase, thereby reducing the absorption rate of the emission restriction gas of the treatment liquid. However, as described above, when the temperature of the process liquid stored in the process liquid supply tank 300 is cooled by the heat exchanger HE to a temperature capable of relatively well absorbing the emission restriction gas contained in the exhaust gas, the emission restriction gas absorption rate of the process liquid may not be reduced.

[0066] The gas-liquid separation treatment liquid regeneration unit 400 can separate the emission-limiting gas from the waste treatment liquid, can regenerate the waste treatment liquid into treatment liquid, and can supply the regenerated treatment liquid to the treatment liquid supply tank 300, the waste treatment liquid being the treatment liquid that has absorbed the emission-limiting gas and is discharged from the gas-liquid reactor 200. In this way, since the treatment liquid can be regenerated and reused, the cost required for treating the exhaust gas can be reduced.

[0067] like Figure 1 As shown, one side of the waste process liquid discharge pipe LD can be connected to the discharge port 213 of the gas-liquid reactor 200, and the other side of the waste process liquid discharge pipe LD can be connected to the gas-liquid separation process liquid regeneration unit 400. Therefore, the waste process liquid discharged through the discharge port 213 of the gas-liquid reactor 200 can flow to the gas-liquid separation process liquid regeneration unit 400 through the waste process liquid discharge pipe LD. In this case, Figure 4 As shown, a booster pump PB may be provided on the waste treatment liquid discharge pipe LD.

[0068] like Figure 1 As shown, a filtering treatment unit WTS may be provided on the waste treatment liquid discharge pipe LD, which filters and treats pollutants other than the emission restriction gas contained in the waste treatment liquid, and the pollutants other than the emission restriction gas contained in the waste treatment liquid may include particulate matter, oil, etc. The filtering treatment unit WTS may filter pollutants other than the emission restriction gas contained in the waste treatment liquid flowing to the gas-liquid separation treatment liquid regeneration unit 400 through the waste treatment liquid discharge pipe LD. For example, particulate matter, oil, etc. contained in the waste treatment liquid may be filtered by the filtering treatment unit WTS, thereby minimizing the amount of pollutants contained in the treatment liquid regenerated in the gas-liquid separation treatment liquid regeneration unit 400. Therefore, the performance of the gas-liquid separation membrane 420 included in the gas-liquid separation treatment liquid regeneration unit 400 may be protected. The filtering treatment unit WTS may filter particulate matter, oil, etc. from the waste treatment liquid using, for example, a filter (not shown), centrifugal force, etc. The structure of the filtering treatment unit WTS filtering particulate matter, oil, etc. from the waste treatment liquid is not particularly limited, and a known structure may be used.

[0069] like Figure 1 As shown, one side of the process liquid recovery pipe LR may be connected to the gas-liquid separation process liquid regeneration unit 400, and the other side of the process liquid recovery pipe LR may be connected to the process liquid supply tank 300. Therefore, the process liquid regenerated in the gas-liquid separation process liquid regeneration unit 400 may be supplied to the process liquid supply tank 300 through the process liquid recovery pipe LR, and may be reused as the process liquid.

[0070] The gas-liquid separation process liquid regeneration unit 400 may include a gas-liquid separation membrane 420 that allows gas to pass but does not allow liquid to pass, and the gas-liquid separation membrane 420 may separate a liquid flow channel 411 through which the waste process liquid flows from a gas flow channel 412 through which the emission-restricted gas flows. The emission-restricted gas may pass through the gas-liquid separation membrane 420 of the present invention, but the waste process liquid may not pass through the gas-liquid separation membrane 420.

[0071] In addition, a low partial pressure of the emission-limiting gas can be formed in the gas flow channel 412, so that the emission-limiting gas absorbed in the waste treatment liquid flows through the liquid flow channel 411 and passes through the gas-liquid separation membrane 420, and moves to the gas flow channel 412 where the low partial pressure of the emission-limiting gas is formed to separate the emission-limiting gas and the treatment liquid. The low partial pressure of the emission-limiting gas can refer to a state of low concentration of the emission-limiting gas. When carbon dioxide in the emission-limiting gas is described as an example, the concentration of carbon dioxide in the gas flow channel 412 may be low, and a low partial pressure of carbon dioxide can be formed. Since the lower the partial pressure, the lower the solubility of the gas in the liquid, the emission-limiting gas absorbed in the waste treatment liquid flows through the liquid flow channel 411 and passes through the gas-liquid separation membrane 420 to move to the gas flow channel 412 where the low partial pressure of the emission-limiting gas is formed. Negative pressure can be applied to generate a low partial pressure of the emission-limiting gas, or the emission-limiting gas can be diluted with purge air. In this way, the emission restricting gas absorbed in the waste processing liquid can flow through the liquid flow channel 411, can pass through the gas-liquid separation membrane 420, and can move to the gas flow channel formed with a low partial pressure of the emission restricting gas to easily separate the emission restricting gas from the waste processing liquid.

[0072] A gas-liquid separation membrane 420 through which gas can pass but liquid cannot pass can be used, and a low partial pressure of the emission-restricted gas can be formed in the gas flow channel 412 separated by the gas-liquid separation membrane 420 to separate the emission-restricted gas from the waste treatment liquid. Therefore, the waste treatment liquid can be regenerated into a treatment liquid that does not absorb the emission-restricted gas. When using this method, since the amount of treatment agent supplied to the regenerated treatment liquid can be reduced, the cost required for regenerating the waste treatment liquid can be reduced. Therefore, the cost required for treating the exhaust gas can be reduced. In addition, since the size of the gas-liquid separation treatment liquid regeneration unit 400 can be made relatively small, the size of the exhaust gas treatment device 100 can be reduced. Therefore, the exhaust gas treatment device 100 can be easily set up in places with limited installation space such as ships.

[0073] like Figure 1 As shown, the gas-liquid separation treatment liquid regeneration unit 400 may be configured to include a separation unit body 410 , and the inner space of the separation unit body 410 may be divided into a liquid flow channel 411 and a gas flow channel 412 by a gas-liquid separation membrane 420 .

[0074] like Figure 1 As shown, the waste process liquid discharge pipe LD connected to the discharge port 213 of the gas-liquid reactor 200 may be connected to one side of the liquid flow passage 411, and the other side of the liquid flow passage 411 may be connected to the process liquid supply tank 300 through the process liquid recovery pipe LR. Therefore, the waste process liquid discharged through the discharge port 213 of the gas-liquid reactor 200 may be introduced into the liquid flow passage 411 to flow through the liquid flow passage 411. While flowing through the liquid flow passage 411, the discharge restriction gas may be separated, and the regenerated process liquid may be introduced into the process liquid recovery pipe LR and flow to the process liquid supply tank 300 through the process liquid recovery pipe LR.

[0075] like Figure 1 As shown, a gas recovery pipe LG having a vacuum pump PV can be connected to one side of the gas flow channel 412, so that when the vacuum pump PV is driven, a low partial pressure of the emission-restricted gas can be formed in the gas flow channel 412. In addition, an intake pipe LA provided with a flow control valve VC can be connected to the other side of the gas flow channel 412. Thus, in a state where the vacuum pump PV is driven, the air flow rate flowing into the intake pipe LA can be controlled by operating the flow control valve VC, thereby adjusting the low partial pressure of the emission-restricted gas formed in the gas flow channel 412.

[0076] like Figure 1 As shown, the gas-liquid separation membrane 420 may be a hollow fiber membrane in which a gas flow channel 412 is formed, and thus, the internal space of the separation unit body 410 except the gas-liquid separation membrane 420 may form a liquid flow channel 411. Figure 2 As shown, the gas-liquid separation membrane 420 may be a hollow fiber membrane in which a liquid flow channel 411 is formed, in which case the internal space of the separation unit body 410 except the gas-liquid separation membrane 420 may be a gas flow channel 412. The gas-liquid separation membrane 420 is not particularly limited, and the gas-liquid separation membrane 420 may be any known gas-liquid separation membrane, such as a flat membrane, as long as the emission-restricted gas can pass through and the waste process liquid cannot pass through, and the internal space of the separation unit body 410 can be divided into the liquid flow channel 411 through which the waste process liquid flows and the gas flow channel 412 through which the emission-restricted gas flows.

[0077] When high-sulfur fuel is used in the exhaust gas emission equipment, the exhaust gas discharged from the exhaust gas emission equipment may contain a relatively large amount of sulfur oxides. In this way, when the exhaust gas containing a large amount of sulfur oxides flows into the shell 210 of the gas-liquid reactor 200, the treatment liquid sprayed into the exhaust gas by the treatment liquid spraying unit 220 can mainly remove the sulfur oxides contained in the exhaust gas from the exhaust gas. That is, the exhaust gas can be desulfurized by the treatment liquid in the gas-liquid reactor 200. As described above, the waste treatment liquid for removing sulfur oxides from the exhaust gas may include sulfur oxides, and the gas-liquid separation treatment liquid regeneration unit 400 can separate the emission-restricted gas from the waste treatment liquid, and the emission-restricted gas may be sulfur oxides such as sulfur dioxide.

[0078] When low-sulfur fuel is used in the exhaust gas emission equipment, the exhaust gas discharged from the exhaust gas emission equipment may contain a relatively small amount of sulfur oxides. Thus, when the exhaust gas containing a small amount of sulfur oxides flows into the housing 210 of the gas-liquid reactor 200, the treatment liquid sprayed into the exhaust gas by the treatment liquid spraying unit 220 can mainly remove carbon dioxide contained in the exhaust gas from the exhaust gas. As described above, the waste treatment liquid for removing carbon dioxide from the exhaust gas may include carbon dioxide, and the gas-liquid separation treatment liquid regeneration unit 400 can separate carbon dioxide from the waste treatment liquid.

[0079] The first embodiment of the exhaust gas treatment device 100 according to the present invention may further include a gas treatment unit 500. The gas treatment unit 500 may treat the emission-restricted gas separated from the waste treatment liquid in the gas-liquid separation treatment liquid regeneration unit 400.

[0080] In the gas processing unit 500, the emission-limited gas can be dissolved in seawater in an environmentally friendly ion state and processed. For example, in the gas processing unit 500, as the emission-limited gas, carbon dioxide can be dissolved in seawater in an environmentally friendly ionized state such as carbonic acid, bicarbonate, carbonate, etc. and processed, and sulfur oxides can be dissolved in seawater in an environmentally friendly ionized state such as sulfuric acid, sulfate, etc. and processed.

[0081] For this reason, Figure 3 As shown, the gas processing unit 500 may include a seawater flow pipe 510 for flowing seawater, the seawater flow pipe is connected to a gas recovery pipe LG connected to the gas-liquid separation treatment liquid regeneration unit 400, and the seawater flow pipe 510 may be, for example, a cooling water pipe, a ballast water pipe, a seawater suction box, etc. provided on a ship. The seawater flow pipe 510 is not particularly limited, and a known pipe may be used, as long as it is a pipe for flowing seawater.

[0082] like Figure 3As shown, the portion of the seawater flow pipe 510 connected to the gas recovery pipe LG may be branched into a plurality of branch portions, and further, the gas recovery pipe LG may be branched and respectively connected to the branch portions of the seawater flow pipe 510 .

[0083] As described above, when the seawater flow pipe 510 has a plurality of branch portions, the flow rate of the seawater can be reduced, and it can be ensured that the emission-restricted gas has enough time to dissolve in the seawater in an environmentally friendly ionic state, and the emission-restricted gas can be better dissolved in the seawater in an environmentally friendly ionic state. Figure 3 As shown, the pressure control device VCP may be provided in the seawater flow pipe 510. Therefore, the pressure of the seawater flowing through the seawater flow pipe 510 may be increased to easily dissolve the emission-restricted gas in the seawater in an environmentally friendly ion state.

[0084] like Figure 3 As shown, the gas processing unit 500 may further include a microbubble generator 520 disposed in the seawater flow pipe 510 to be connected to the gas recovery pipe LG. In the microbubble generator 520, the emission-restricted gas may be mixed as microbubbles with the seawater flowing through the seawater flow pipe 510. For example, a plurality of micropores 521 may be formed in the microbubble generator 520 so that the emission-restricted gas flowing through the gas recovery pipe LG is mixed as microbubbles with the seawater flowing through the seawater flow pipe 510 through the micropores 521. In this way, when the emission-restricted gas is mixed as microbubbles with the seawater flowing through the seawater flow pipe 510, the emission-restricted gas may be better dissolved in the seawater in an environmentally friendly ionic state.

[0085] The gas processing unit 500 may further include a gas mixer 530. Figure 3 As shown, the gas mixer 530 may be provided in a portion of the seawater flow pipe 510 adjacent to the microbubble generator 520 in the flow direction of the seawater. In addition, the bubbles of the emission-restricting gas generated in the microbubble generator 520 and supplied to the seawater flowing through the seawater flow pipe 510 may be mixed with the seawater. For example, the gas mixer 530 may be provided to rotate a mixing member 531 having a spiral shape and mix the emission-restricting gas bubbles of the seawater supplied to the seawater flow pipe 510 with the seawater. Therefore, the emission-restricting gas may be better dissolved in the seawater in an environmentally friendly ion state.

[0086] As mentioned above, Figure 3 As shown, the branched portions of the seawater flow pipe 510 can be merged again and connected to the ocean SEA. Therefore, seawater in which the emission-restricted gas is dissolved in an environmentally friendly ion state can be discharged into the ocean SEA. Figure 3As shown, the water quality measurement sensor SP may be provided in a portion of a seawater flow pipe 510 for discharging seawater in which the emission-restricted gas is dissolved in an environmentally friendly ion state into the sea.

[0087] In addition, the gas processing unit 500 may dissolve and process the emission-restricted gas in an environmentally friendly ion state in fresh water flowing through a fresh water flow pipe (not shown).

[0088] The gas processing unit 500 can store and process the emission-restricted gas separated from the waste process liquid in the gas-liquid separation process liquid regeneration unit 400. In some areas of the ocean SEA, a no-emission state in which no material is discharged from a ship or the like may be required. Therefore, in a ship operating in such an area, the gas processing unit 500 can store the emission-restricted gas separated from the waste process liquid in the gas-liquid separation process liquid regeneration unit 400. In this way, the emission-restricted gas stored in the gas processing unit 500 can be supplied to a use site.

[0089] like Figure 4 As shown, the gas processing unit 500 may include a gas storage tank 540, and a gas recovery pipe LG is connected to the gas storage tank to store the emission-restricted gas.

[0090] The emission restriction gas separated from the waste process liquid in the gas-liquid separation process liquid regeneration unit 400 may be stored in the gas storage tank 540 through the gas recovery pipe LG. In the gas storage tank 540, the emission restriction gas may be cooled and compressed to liquefy the emission restriction gas, thereby storing the emission restriction gas in a liquid state. In this way, the emission restriction gas stored in the gas storage tank 540 in a liquid state may be supplied to a use site.

[0091] Second embodiment of the exhaust gas treatment device

[0092] In the following, reference will be made to Figure 5 A second embodiment of the exhaust gas treatment device according to the present invention will be described.

[0093] Figure 5 is a view showing a second embodiment of the exhaust gas treatment device according to the present invention.

[0094] In this case, the second embodiment of the exhaust gas treatment device according to the present invention is the same as that described above with reference to Figures 1 to 4The first embodiment of the exhaust gas treatment device according to the present invention described may be different in that sulfur oxides contained in the exhaust gas from the gas-liquid reactor 200 can be absorbed and removed by the first treatment liquid, and carbon dioxide contained in the exhaust gas from which the sulfur oxides have been removed can be absorbed and removed by the second treatment liquid. To this end, a first removal region RR1, a second removal region RR2, and a connection region RC are provided in the gas-liquid reactor 200, in which the exhaust gas and the first treatment liquid are contacted to remove sulfur oxides; in the second removal region, the exhaust gas and the second treatment liquid are contacted to remove carbon dioxide; and the connection region RC connects the first removal region RR1 and the second removal region RR2.

[0095] Therefore, the following will mainly describe the differences, and the remaining configurations can be referred to. Figures 1 to 4 Described construction instead.

[0096] In the gas-liquid reactor 200 of the second embodiment of the exhaust gas treatment device 100 according to the present invention, sulfur oxides contained in the exhaust gas can be absorbed and removed by the first treatment liquid, and carbon dioxide contained in the exhaust gas from which the sulfur oxides have been removed can be absorbed and removed by the second treatment liquid.

[0097] When a treatment liquid (e.g., an alkaline aqueous solution) is sprayed into a waste gas containing sulfur oxides and carbon dioxide, the sulfur oxides can be removed from the waste gas first. Therefore, in order to remove carbon dioxide from the waste gas, the sulfur oxides contained in the waste gas should be removed first. As described above, when the first treatment liquid absorbs and removes the sulfur oxides contained in the waste gas, and the second treatment liquid absorbs and removes the carbon dioxide contained in the waste gas from which the sulfur oxides have been removed, all the sulfur oxides and carbon dioxide can be removed from the waste gas. In addition, even if the waste gas contains a small amount of sulfur oxides, since the sulfur oxides can be removed first, the removal rate of carbon dioxide can be further improved.

[0098] A first removal region RR1, a second removal region RR2, and a connection region RC may be provided in the gas-liquid reactor 200. In the first removal region RR1, the exhaust gas contacts the first treatment liquid to remove sulfur oxides; in the second removal region RR2, the exhaust gas contacts the second treatment liquid to remove carbon dioxide; and the connection region RC connects the first removal region RR1 and the second removal region RR2.

[0099] For this reason, Figure 5 As shown, the housing 210 of the gas-liquid reactor 200 may be divided into a first removal region RR1 , a second removal region RR2 , and a connection region RC by a plurality of partition walls WD.

[0100] In this case, a plurality of partition walls WD may be provided in the housing 210 such that the exhaust gas flows from bottom to top in the first and second removal regions RR1 and RR2 and such that the exhaust gas flows from top to bottom in the connection region RC.

[0101] For example, Figure 5 As shown, two partition walls WD may be respectively provided in the housing 210 so that the internal space of the housing 210 may be divided into the first removal area RR1, the second removal area RR2, and the connection area RC. For example, one partition wall WD may divide the internal space of the housing 210 into the first removal area RR1 and a part of the connection area RC, and the other partition wall WD may divide the internal space of the housing 210 into the second removal area RR2 and the remaining part of the connection area RC.

[0102] In addition, if Figure 5 As shown, the partition wall WD separating the first removal area RR1 and a portion of the connection area RC may have an upper end portion spaced apart from the upper end portion of the shell 210 by a predetermined distance in the internal space of the shell 210, and further, the partition wall WD separating the second removal area RR2 and the remaining portion of the connection area RC may have a lower end portion spaced apart from the lower end portion of the shell 210 by a predetermined distance in the internal space of the shell 210.

[0103] In addition, the inlet 211 connected to the exhaust gas discharge device can be connected to the first removal area RR1, and the outlet 212 can be connected to the second removal area RR2. In addition, the shell 210 can be respectively provided with a first discharge port 213' and a second discharge port 213", and the first discharge port 213' can be connected to the first removal area RR1, and the second discharge port 213" can be connected to the second removal area RR2.

[0104] Therefore, the exhaust gas can flow from bottom to top in both the first removal region RR1 and the second removal region RR2 to remove sulfur oxides or carbon dioxide, and the exhaust gas from which sulfur oxides have been removed in the first removal region RR1 can flow from top to bottom in the connecting region RC to be introduced into the second removal region RR2.

[0105] In addition, the gas-liquid separation treatment liquid regeneration unit 400 may include a pretreatment structure and a treatment liquid recovery structure connected to the gas-liquid separation treatment liquid regeneration unit 400 for regenerating the waste treatment liquid, and a structure connected to a gas recovery pipe for separating carbon dioxide.

[0106] like Figure 5 As shown, the gas-liquid reactor 200 according to the second embodiment of the exhaust gas treatment device 100 of the present invention may include a first treatment liquid injection unit 220' and a second treatment liquid injection unit 220".

[0107] The first treatment liquid spraying unit 220' may spray the first treatment liquid into the exhaust gas flowing through the first removal area RR1 of the housing 210. Figure 5 As shown, the first treatment liquid spraying unit 220' may include a first treatment liquid flow pipe 221' and a first treatment liquid nozzle 222'.

[0108] The first processing liquid flow pipe 221' may pass through one side of the housing 210 and may be disposed in the first removal area RR1. In addition, the first processing liquid nozzle 222' may be disposed in a portion of the first processing liquid flow pipe 221' disposed in the first removal area RR1.

[0109] The first treatment liquid spraying unit 220' may be provided as a plurality of first treatment liquid spraying units 220'. In this case, the plurality of first treatment liquid spraying units 220' may be arranged vertically at predetermined intervals. In addition, the first treatment liquid spraying unit 220' at the bottom may perform a pre-treatment of removing a portion of sulfur oxides from the exhaust gas while cooling the temperature of the exhaust gas by the first treatment liquid to promote the removal of sulfur oxides and carbon dioxide. In addition, the remaining portion of the first treatment liquid spraying unit 220' may perform a post-treatment to remove the remaining portion of sulfur oxides from the exhaust gas. For example, Figure 5 As shown, there may be two first treatment liquid spraying units 220'. The number of the first treatment liquid spraying units 220' is not particularly limited, and any number may be used.

[0110] The first treatment liquid may be seawater. In this case, Figure 5 As shown, the first treatment liquid supply pipe LP' connected to the sea SEA may be connected to the first treatment liquid flow pipe 221' of the first treatment liquid injection unit 220'. The first treatment liquid supply pump PP' may be provided in the first treatment liquid supply pipe LP'. In addition, the first waste treatment liquid discharge pipe LD' connected to the sea SEA may be connected to the first discharge port 213' connected to the first removal area RR1 of the housing 210.

[0111] Therefore, when the first treatment liquid supply pump PP' is driven, seawater may flow through the first treatment liquid flow pipe 221' of the first treatment liquid injection unit 220' as the first treatment liquid to be injected into the exhaust gas flowing through the first removal area RR1 of the housing 210 through the first treatment liquid nozzle 222'. In addition, the first waste treatment liquid may be the seawater injected into the first removal area RR1 of the housing 210 and the first waste treatment liquid absorbs sulfur oxides from the exhaust gas and may be discharged to the ocean SEA through the first waste treatment liquid discharge pipe LD'. A water treatment unit (not shown) may be provided in the first waste treatment liquid discharge pipe LD' to perform water treatment on the first waste treatment liquid and then discharge the water-treated first waste treatment liquid to the ocean SEA, the first waste treatment liquid may be the seawater that absorbs sulfur oxides from the exhaust gas.

[0112] The second treatment liquid spraying unit 220" may spray the second treatment liquid into the exhaust gas flowing through the second removal area RR2 of the housing 210. Figure 5 As shown, the second treatment liquid spraying unit 220" may include a second treatment liquid flow pipe 221" and a second treatment liquid nozzle 222".

[0113] The second processing liquid flow pipe 221 ″ may pass through the other surface of the housing 210 and may be disposed in the second removal region RR2. The second processing liquid nozzle 222 ″ may be disposed at a portion of the second processing liquid flow pipe 221 ″ disposed in the second removal region RR2.

[0114] In the treatment liquid supply tank 300 of the second embodiment of the exhaust gas treatment device 100 according to the present invention, the second treatment liquid can be supplied to the gas-liquid reactor 200. To this end, the second treatment liquid can be stored in the treatment liquid supply tank 300, and the second treatment liquid supply pipe LP" connected to the treatment liquid supply tank 300 can be connected to the second treatment liquid flow pipe 221" of the second treatment liquid injection unit 220".

[0115] The second treatment liquid supply pump PP" can be set in the second treatment liquid supply pipe LP". When the second treatment liquid supply pump PP" is driven, the second treatment liquid stored in the treatment liquid supply tank 300 can flow through the second treatment liquid flow pipe 221" of the second treatment liquid injection unit 220" to be injected into the exhaust gas flowing through the second removal area RR2 of the shell 210 through the second treatment liquid nozzle 22".

[0116] The second treatment liquid may be an alkaline aqueous solution, such as a sodium hydroxide aqueous solution.

[0117] The gas-liquid separation treatment liquid regeneration unit 400 according to the second embodiment of the waste gas treatment device 100 of the present invention can separate carbon dioxide from the second waste treatment liquid discharged from the gas-liquid reactor 200, can regenerate the second waste treatment liquid as a second treatment liquid, and can supply the regenerated second treatment liquid to the treatment liquid supply tank 300, and the second waste treatment liquid can be the second treatment liquid that absorbs carbon dioxide.

[0118] For this reason, carbon dioxide can pass through the gas-liquid separation membrane 420 of the gas-liquid separation treatment liquid regeneration unit 400, but the second waste treatment liquid cannot pass through the gas-liquid separation membrane 420. In addition, the second waste treatment liquid discharge pipe LD" connected to the gas-liquid reactor 200 can be connected to one side of the liquid flow channel 411 of the gas-liquid separation treatment liquid regeneration unit 400. For example, Figure 5 As shown, the second waste process liquid discharge pipe LD" can be connected to the second discharge port 213" connected to the second removal area RR2 of the gas-liquid reactor 200, and the second waste process liquid discharge pipe LD" can be connected to one side of the liquid flow channel 411 of the gas-liquid separation process liquid regeneration unit 400. In addition, the other side of the liquid flow channel 411 can be connected to the process liquid supply tank 300 through the process liquid recovery pipe LR.

[0119] Therefore, when the second waste treatment liquid discharged through the second discharge port 213″ of the gas-liquid reactor 200 flows through the liquid flow channel 411 of the gas-liquid separation treatment liquid regeneration unit 400 through the second waste treatment liquid discharge pipe LD″, carbon dioxide can be separated from the second waste treatment liquid, and the second waste treatment liquid can be regenerated into the second treatment liquid. The regenerated second treatment liquid can be supplied to the treatment liquid supply tank 300 through the treatment liquid recovery pipe LR.

[0120] In addition, carbon dioxide separated from the second waste treatment liquid flowing through the liquid flow channel 411 of the gas-liquid separation treatment liquid regeneration unit 400 and moved to the gas flow channel 412 can flow to the gas treatment unit 500 through the gas recovery pipe LG connected to the gas flow channel 412 and be treated thereby.

[0121] Third embodiment of the exhaust gas treatment device

[0122] In the following, reference will be made to Figure 6 A third embodiment of the exhaust gas treatment device according to the present invention is described.

[0123] Figure 6 is a view showing a third embodiment of the exhaust gas treatment device according to the present invention.

[0124] In this case, the third embodiment of the exhaust gas treatment device according to the present invention is the same as that described above with reference to Figure 5The second embodiment of the waste gas treatment device according to the present invention described may differ in the following aspects, namely: the treatment liquid supply tank 300 may supply the first treatment liquid and the second treatment liquid to the gas-liquid reactor 200, respectively, and may include a first gas-liquid separation treatment liquid regeneration unit 400' for regenerating the first waste treatment liquid as the first treatment liquid and a second gas-liquid separation treatment liquid regeneration unit 400" for regenerating the second waste treatment liquid as the second treatment liquid.

[0125] Therefore, the following will mainly describe the differences, and the remaining configurations can be referred to. Figures 1 to 5 Described construction instead.

[0126] The treatment liquid supply tank 300 of the third embodiment of the exhaust gas treatment device 100 according to the present invention can supply the first treatment liquid and the second treatment liquid to the gas-liquid reactor 200, respectively.

[0127] For this reason, Figure 6 As shown, the inner space of the process liquid supply tank 300 may be partitioned by a partition wall WD into a first storage area SS1 storing the first process liquid and a second storage area SS2 storing the second process liquid.

[0128] In addition, the first storage area SS1 can be connected to the first processing liquid injection unit 220' of the gas-liquid reactor 200 through the first processing liquid supply pipe LP', and the second storage area SS2 can be connected to the second processing liquid injection unit 220" of the gas-liquid reactor 200 through the second processing liquid supply pipe LP".

[0129] Therefore, when the first treatment liquid supply pump PP' provided in the first treatment liquid supply pipe LP' is driven, the first treatment liquid in the first storage area SS1 may be supplied to the first treatment liquid injection unit 220' through the first treatment liquid supply pipe LP'. The first treatment liquid supplied to the first treatment liquid injection unit 220' may be injected into the exhaust gas flowing through the first removal area RR1 of the gas-liquid reactor 200.

[0130] In addition, when the second treatment liquid supply pump PP" set in the second treatment liquid supply pipe LP" is driven, the second treatment liquid in the second storage area SS2 can be supplied to the second treatment liquid injection unit 220" through the second treatment liquid supply pipe LP". The second treatment liquid supplied to the second treatment liquid injection unit 220" can be injected into the exhaust gas of the second removal area RR2 flowing through the gas-liquid reactor 200.

[0131] The first treatment liquid spraying unit 220' may be provided as a plurality of first treatment liquid spraying units 220', and the filler 230 may be provided in a portion of the first removal region RR1 between the plurality of first treatment liquid spraying units 220'. Figure 6As shown, two first processing liquid spraying units 220 ′ may be vertically arranged at a predetermined interval, and a filler 230 may be provided in a portion of the first removal region RR1 between the two first processing liquid spraying units 220 ′.

[0132] The first gas-liquid separation treatment liquid regeneration unit 400' can separate sulfur oxides from the first waste treatment liquid, regenerate the first waste treatment liquid into the first treatment liquid, and supply the regenerated first treatment liquid to the treatment liquid supply tank 300. The first waste treatment liquid can be the first treatment liquid that absorbs sulfur oxides and is discharged from the gas-liquid reactor 200.

[0133] To this end, in the first gas-liquid separation process liquid regeneration unit 400', the first gas-liquid separation membrane 420' through which the sulfur oxides can pass but the first waste process liquid cannot pass can separate the first liquid flow channel 411' through which the first waste process liquid flows and the first gas flow channel 412' through which the sulfur oxides flow. In addition, a low partial pressure of the sulfur oxides can be formed in the first gas flow channel 412', so that the sulfur oxides contained in the first waste process liquid in the first liquid flow channel 411' can pass through the first gas-liquid separation membrane 420' and move to the first gas flow channel 412'.

[0134] The first gas-liquid separation treatment liquid regeneration unit 400' may also include a first separation unit body 410', the internal space of which is divided into a first liquid flow channel 411' and a first gas flow channel 412' by a first gas-liquid separation membrane 420'. In addition, a first waste treatment liquid discharge pipe LD' connected to the first discharge port 213' of the gas-liquid reactor 200 may be connected to one side of the first liquid flow channel 411', and the other side of the first liquid flow channel 411' may be connected to the first storage area SS1 of the treatment liquid supply tank 300 through a first treatment liquid recovery pipe LR'. A first gas recovery pipe LG' provided with a vacuum pump PV may be connected to one side of the first gas flow channel 412', so that a low partial pressure of sulfur oxides may be formed in the first gas flow channel 412'. In addition, a first air intake pipe LA' provided with a flow control valve VC may be connected to the other side of the first gas flow channel 412' to adjust the partial pressure of sulfur oxides formed in the first gas flow channel 412'. In addition, the first gas-liquid separation membrane 420 ′ may be a hollow fiber membrane in which the first gas flow channel 412 ′ or the first liquid flow channel 411 ′ may be formed.

[0135] The second gas-liquid separation treatment liquid regeneration unit 400" can separate carbon dioxide from the second waste treatment liquid to regenerate the second waste treatment liquid into a second treatment liquid, and can supply the regenerated second treatment liquid to the treatment liquid supply tank 300. The second waste treatment liquid can be the second treatment liquid that absorbs carbon dioxide and is discharged from the gas-liquid reactor 200.

[0136] To this end, in the second gas-liquid separation treatment liquid regeneration unit 400", the second gas-liquid separation membrane 420", through which carbon dioxide can pass but the second waste treatment liquid cannot pass, can separate the second liquid flow channel 411", through which the second waste treatment liquid flows, from the second gas flow channel 412", through which carbon dioxide flows. In addition, a low partial pressure of carbon dioxide can be formed in the second gas flow channel 412", so that the carbon dioxide contained in the second waste treatment liquid in the second liquid flow channel 411", can move to the second gas flow channel 412", through the second gas-liquid separation membrane 420".

[0137] The second gas-liquid separation treatment liquid regeneration unit 400" may also include a second separation unit body 410", whose internal space is divided into a second liquid flow channel 411" and a second gas flow channel 412" by a second gas-liquid separation membrane 420". In addition, a second waste treatment liquid discharge pipe LD" connected to the second discharge port 213" of the gas-liquid reactor 200 may be connected to one side of the second liquid flow channel 411", and the other side of the second liquid flow channel 411" may be connected to the second storage area SS2 of the treatment liquid supply tank 300 through a second treatment liquid recovery pipe LR". In addition, a second gas recovery pipe LG" provided with a vacuum pump PV may be connected to one side of the second gas flow channel 412", so that a low partial pressure of carbon dioxide may be formed in the second gas flow channel 412". In addition, a second air inlet pipe LA" provided with a flow control valve VC may be connected to the other side of the second gas flow channel 412" to adjust the partial pressure of carbon dioxide formed in the second gas flow channel 412". In addition, the second gas-liquid separation membrane 420 ″ may be a hollow fiber membrane in which the second gas flow channel 412 ″ or the second liquid flow channel 411 ″ may be formed.

[0138] The first treatment liquid and the second treatment liquid may be alkaline aqueous solutions, such as sodium hydroxide aqueous solutions, etc. In this case, an alkaline agent such as sodium hydroxide may be stored in the treatment agent supply tank 600, and the treatment agent supply tank 600 may be connected to the first storage area SS1 and the second storage area SS2 of the treatment liquid supply tank 300, respectively, so that the alkaline agents may be supplied as treatment agents, respectively.

[0139] The first process liquid and the second process liquid may be different.

[0140] In addition, each of the first gas recovery pipe LG” and the second gas recovery pipe LG” may be connected to the gas processing unit 500 .

[0141] Fourth embodiment of the exhaust gas treatment device

[0142] Below, we will refer to Figure 7 A fourth embodiment of the exhaust gas treatment device according to the present invention will be described.

[0143] Figure 7 1 is a view showing a fourth embodiment of the exhaust gas treatment device according to the present invention.

[0144] In this case, the fourth embodiment of the exhaust gas treatment device according to the present invention is the same as that described above with reference to Figure 5 and 6 The described second and third embodiments of the exhaust gas treatment device according to the present invention may differ in that the cross section of the housing 210 of the gas-liquid reactor 200 is circular or elliptical.

[0145] Therefore, the following will mainly describe the differences, and the remaining configurations can be referred to. Figures 1 to 6 Described construction instead.

[0146] In the fourth embodiment of the exhaust gas treatment device 100 according to the present invention, the cross section of the housing 210 of the gas-liquid reactor 200 may be circular or elliptical. Figure 7 As shown, the housing 210 may be a cylinder or an elliptical cylinder. The first removal area RR1 may be located at the outermost side in the radial direction inside the housing 210, the connection area RC may be located inside the first removal area RR1, and the second removal area RR2 may be located inside the connection area RC. To this end, the cross-sections of the first removal area RR1 and the connection area RC may be annular, and the cross-section of the second removal area RR2 may be circular or elliptical. Therefore, since the exhaust gas can flow smoothly instead of flowing in one direction, the treatment of the exhaust gas can be performed more smoothly.

[0147] A plurality of partition walls WD, which may be cylindrical or elliptical, may be provided in the housing 210 to partition the inner space of the housing 210 into a first removal area RR1, a connection area RC, and a second removal area RR2. Figure 7 As shown, two partition walls WD may be provided in the housing 210 , which may be cylindrical or elliptical cylindrical, to partition the inner space of the housing 210 into a first removal region RR1 , a connection region RC, and a second removal region RR2 .

[0148] A plurality of partition walls WD may be provided in the housing 210 to allow the exhaust gas to flow from bottom to top in the first and second removal regions RR1 and RR2 and to allow the exhaust gas to flow from top to bottom in the connection region RC.

[0149] In the gas-liquid reactor 200 having the above-mentioned configuration, the exhaust gas discharged from the exhaust gas discharge device can first be introduced into the first removal area RR1 formed in the radially outermost side of the shell 210 and connected to the inlet 211 through the inlet 211. While the exhaust gas introduced into the first removal area RR1 flows through the first removal area RR1, sulfur oxides can be removed by the first treatment liquid sprayed into the first removal area RR1. The exhaust gas from which the sulfur oxides have been removed can flow into the second removal area RR2 inside the connection area RC through the connection area RC inside the first removal area RR1. When the exhaust gas introduced into the second removal area RR2 flows through the second removal area RR2, carbon dioxide can be removed. The exhaust gas from which carbon dioxide has been removed can be discharged through the outlet 212 connected to the second removal area RR2.

[0150] As described above, when the exhaust gas treatment device according to the present invention is used, the exhaust treatment liquid can be regenerated by separating the emission-restricted gas from the exhaust treatment liquid that has treated the exhaust gas through the gas-liquid separation treatment liquid regeneration unit, the regeneration rate of the exhaust treatment liquid that has treated the exhaust gas can be improved, the cost of treating the exhaust gas in the exhaust gas treatment device can be reduced, the size of the exhaust gas treatment device can be reduced, and the emission-restricted gas can be separated from the exhaust treatment liquid that absorbs the emission-restricted gas contained in the exhaust gas, and the separated emission-restricted gas can be treated by dissolving the emission-restricted gas in seawater in an environmentally friendly ionic state.

[0151] The exhaust gas treatment device may not be limited to the configuration to which the above-described embodiments are applied, and the embodiments may be configured by selectively combining all or part of each embodiment, thereby achieving various modifications.

Claims

1. An exhaust gas treatment device, comprising: a gas-liquid reactor that brings a treatment liquid into contact with an emission-restricted gas contained in the exhaust gas to absorb and remove the emission-restricted gas; a process liquid supply tank for supplying the process liquid to the gas-liquid reactor; as well as a gas-liquid separation treatment liquid regeneration unit, which regenerates the waste treatment liquid that has absorbed the emission-restricted gas into a treatment liquid that has not absorbed the emission-restricted gas, and supplies the regenerated treatment liquid to the treatment liquid supply tank, The gas-liquid separation treatment liquid regeneration unit includes a gas-liquid separation membrane through which gas can pass but liquid cannot pass, and the gas-liquid separation membrane separates a liquid flow channel through which the waste treatment liquid flows and a gas flow channel through which the emission restriction gas flows, and The emission-restricting gas absorbed in the waste treatment liquid flows through the liquid flow channel and passes through the gas-liquid separation membrane, and moves to the gas flow channel where the emission-restricting gas has a low partial pressure, so as to separate the emission-restricting gas and the treatment liquid. An intake pipe provided with a flow control valve is connected to the other side of the gas flow passage to control a partial pressure of the emission restriction gas formed in the gas flow passage.

2. The exhaust gas treatment device according to claim 1, wherein: A waste treatment liquid discharge pipe connected to the gas-liquid reactor is connected to one side of the liquid flow channel, and the other side of the liquid flow channel is connected to the treatment liquid supply tank through a treatment liquid recovery pipe.

3. The exhaust gas treatment device according to claim 2, wherein: The waste process liquid discharge pipe includes a filter treatment unit that filters pollutants other than the discharge restriction gas contained in the waste process liquid.

4. The exhaust gas treatment device according to claim 1, wherein: A gas recovery pipe provided with a vacuum pump is connected to one side of the gas flow channel to form a low partial pressure of the emission restriction gas in the gas flow channel.

5. The exhaust gas treatment device according to claim 1, wherein: The gas-liquid separation membrane is a hollow fiber membrane in which the gas flow channel or the liquid flow channel is formed.

6. The exhaust gas treatment device according to claim 1, wherein: The gas-liquid reactor includes: a housing connected to an exhaust gas discharge device; and a treatment liquid injection unit that injects a treatment liquid into the exhaust gas flowing through the housing.

7. The exhaust gas treatment device according to claim 6, wherein: The treatment liquid spraying unit includes: a treatment liquid flow pipe connected to the treatment liquid supply tank, passing through one surface of the shell, and arranged in the shell; and a treatment liquid nozzle arranged at a portion of the treatment liquid flow pipe arranged in the shell.

8. The exhaust gas treatment device according to claim 1, wherein: A heat exchanger is connected to the process liquid supply tank to cool the process liquid stored in the process liquid supply tank.

9. The exhaust gas treatment device according to claim 1, wherein: The emission-restricted gas is sulfur oxide or carbon dioxide, and the treatment liquid is seawater or an alkaline aqueous solution.

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