Gas condensation device with backflow separator

Abstract

Gas condensation device (200) comprising: a housing (202); a condenser (210) mounted in an upper portion of the housing (202) and configured to condense regeneration gas, thereby forming condensate; and a return flow device (220) mounted in the housing (202) below the condenser (210) and configured to temporarily store the condensate and release evaporative gas evaporated from the condensate back into the condenser (210), wherein the gas condensation device (200) separates target gas from the condensate, wherein the return flow device (220) comprises: a condensate chamber (250) formed on the lower portion of the housing (202) and configured to temporarily store the condensate; and a backflow separator (230) arranged in the housing (202) between the condenser (210) and the condensate chamber (250), wherein the backflow separator (230) is designed to supply the condensate leaving the condenser (210) to the condensate chamber (250) and to release the evaporation gas evaporated from the condensate to an exterior space of the condensate chamber (250), wherein the backflow separator (230) is configured to separate an outlet through which the evaporation gas is discharged from the condensate chamber (250) from an inlet through which the condensate leaving the condenser (210) enters the condensate chamber (250), wherein the backflow separator (230) comprises: a mounting plate (232) mounted transversely across the housing (202) between the condenser (210) and the condensate chamber (250) and having at least one gas flow opening (236) formed thereon; a body (234) having a hollow column shape mounted on an upper surface of the mounting plate (232) and having an upper end blocked by a roof (240); at least one gas bypass port (238) formed on a side surface of the body (234) and enabling fluid communication between an interior of the body (234) and an exterior of the body (234); and a liquid supply tube (242) extending from the mounting plate (232) into the condensate chamber (250) and configured to supply the condensate to the condensate chamber (250), and wherein the at least one gas flow opening (236) enables fluid communication between an interior space of the housing (202) below the mounting plate (232) and the interior space of the body (234).

Description

Technical field

[0001] The present disclosure relates to a gas condensation device with a backflow separator applicable to gas-liquid separation processes. More specifically, the present disclosure relates to a gas condensation device with a backflow separator that can reduce installation space and heat loss by assembling a condenser and a backflow device in one housing. background

[0002] Recently, a technology has been developed to prevent the release of carbon dioxide into the atmosphere due to the increasing severity of global warming and air pollution. In particular, a method for efficiently capturing carbon dioxide emitted from thermoelectric power plants or boilers has been increasingly developed.

[0003] Among various gas capture methods, chemical absorption using an absorbent liquid is widely accepted as the most suitable for capturing carbon dioxide in large quantities. According to a gas capture plant using the chemical absorption method, carbon dioxide emitted from thermoelectric power plants or boilers is absorbed into the absorbent liquid in an absorption column, and the saturated absorbent liquid containing carbon dioxide is heated in a regeneration tower to separate the regeneration gas containing the carbon dioxide from the absorbent liquid.

[0004] According to a conventional gas collection device, carbon dioxide and the absorbent liquid come into contact with each other in a rectifier mounted in the absorption column. At this time, a device for collecting the absorbent liquid is mounted in a filler at a middle portion of the rectifier, or a separator plate for uniformly separating gas is mounted in an upper portion of the absorption column to prevent channeling from occurring when the absorbent liquid passes through the filler in the rectifier. That is, channeling of gas and liquid is prevented by changing a structure of an upper portion of the absorption column. However, it is very difficult to control abnormal phenomena due to the high linear velocity of the gas in a lower portion of the absorption column and absorption liquid droplets.

[0005] Additionally, an evaporator for heating the absorbent liquid is mounted on the regeneration tower as an energy source for regeneration. The evaporator heats the absorbent liquid to a temperature at which regeneration is possible, thereby separating the gas contained in the absorbent liquid. The gas separated from the absorbent liquid moves to an upper section of the regeneration tower, where usable material is collected in a condenser, and the material-removing gas is discharged from the regeneration tower.

[0006] Conventionally, a boiler evaporator or thermosiphon evaporator is used.

[0007] The boiler evaporator includes first and second parts separated by a wall. A heater or heat exchanger is disposed in the first part, and an absorbent liquid outlet is formed in the second part. When the absorbent liquid containing the gas is supplied to an upper portion of the evaporator, a filling level of the absorbent liquid in the evaporator rises. At this time, the absorbent liquid is heated by the heater or heat exchanger, and the gas is separated from the absorbent liquid and moves upward. Because the absorbent liquid is continuously supplied, the absorbent liquid from which the gas is removed or which contains less gas overcomes the wall and moves into the second part. Thereafter, the absorbent liquid is discharged from the evaporator through the absorbent liquid outlet.In the boiler evaporator, splashes occur due to the liquid wave generated by a liquid drop and the heating of the mixed liquid. Therefore, it is very difficult to precisely control the fill level of the absorbent liquid.

[0008] The thermosiphon evaporator includes a heater or a heat exchanger, and an absorbent liquid outlet is formed at a bottom surface of the evaporator. When the absorbent liquid containing the gas is supplied to an upper portion of the evaporator, the absorbent liquid in the evaporator is heated by the heater or the heat exchanger, and the gas is separated from the absorbent liquid and moves upward. At this time, the absorbent liquid from which the gas has been removed or which contains less gas moves toward the bottom surface of the evaporator and is discharged from the evaporator through the absorbent liquid outlet. According to the thermosiphon evaporator, it is difficult to control a filling level of the absorbent liquid due to boiling. In addition, since there is no wall in the evaporator, the mixed liquid remains in the evaporator for a very short period of time.Therefore, less energy is supplied to the mixed liquid and gas separation efficiency for regeneration is very low.

[0009] In addition, the feed path of the mixed liquid and the discharge path of the gas separated from the mixed liquid are the same in the boiler evaporator and the thermosiphon evaporator. Therefore, when bubbles occur due to heating, the mixed liquid cannot reach the heater or heat exchanger due to the bubbles. If this condition persists, the filling level of the mixed liquid in the regeneration tower will be raised too high, causing the absorption column and regeneration tower to malfunction.

[0010] Furthermore, a gas collection plant using the chemical absorption method includes a condenser for condensing the regeneration gas and generating a condensate, and a backflow device for discharging gas evaporated from the condensate to an outside thereof to collect the gas and return the condensate to the regeneration tower.

[0011] In a conventional gas collection system, the condenser and the recirculation device are arranged separately to control the condensate filling level in the recirculation device. As a result, the volume of the gas collection system becomes large, and a large space is required to install the gas collection system. In addition, since the recirculation device and the condenser are separated, a large amount of heat loss occurs between the recirculation device and the condenser.

[0012] From US 2007 / 0 180 855 A1 a gas condensation device is known which is equipped with a condenser and a separate backflow device with a backflow separator.

[0013] US 2003 / 0 032 844 A1 discloses a process for producing methanol which, among other things, uses a gas collection plant with an absorption column.

[0014] KR 10 2014 074 013 A and KR 10 2010 113 438 A represent the general state of the art.

[0015] The above information disclosed in this Background section is provided only to enhance the understanding of the background of the invention and may therefore contain information that is not part of the prior art known to one of ordinary skill in the art in this country. Description of the invention

[0016] The invention is defined in the independent claims. Advantageous further developments emerge from the subclaims. The present disclosure was made in an effort to provide a gas condensing device that has the advantages of reducing mounting space and heat loss of liquid moving between a condenser and a recirculation device by mounting a condenser and a recirculation device in one housing.

[0017] An embodiment of the present invention provides a gas condensing device with further advantages of facilitating recondensation of evaporative gas by separating a path through which condensate is supplied to a condensate chamber of a housing from a path through which evaporative gas is discharged from the condensate chamber, and preventing flow interference between the condensate and the evaporative gas.

[0018] A gas condensing apparatus according to an exemplary embodiment of the present invention can condense regeneration gas and separate target gas from the condensate.

[0019] The gas condensation device comprises: a housing; a condenser mounted in an upper portion of the housing and configured to condense the regeneration gas; and a backflow device mounted in the housing below the condenser and configured to temporarily store the condensate and discharge evaporation gas evaporated from the condensate back to the condenser:

[0020] In embodiments of the invention, the backflow device comprises: a condensate chamber formed in the lower portion of the housing and configured to temporarily store the condensate; and a backflow separator arranged in the housing between the condenser and the condensate chamber, wherein the backflow separator is configured to supply the condensate leaving the condenser to the condensate chamber and discharge the evaporation gas evaporated from the condensate to an exterior of the condensate chamber.

[0021] In embodiments according to the invention, the backflow separator is designed to separate an outlet through which the evaporation gas is discharged from the condensate chamber from an inlet through which the condensate leaving the condenser enters the condensate chamber.

[0022] In embodiments of the invention, the backflow separator comprises: a third mounting plate arranged across the housing between the condenser and the condensate chamber and provided with at least one third gas flow opening formed thereon; a third body having a hollow column shape, mounted on an upper surface of the third mounting plate and having an upper end blocked by a third roof; at least one third gas bypass port formed on a side surface of the third body and enabling fluid communication between an interior of the third body and an exterior of the third body;and a second liquid supply tube extending from the third mounting plate into the condensate chamber and configured to supply the condensate to the condensate chamber, wherein the at least one third gas flow opening enables fluid communication between an interior space of the housing below the third mounting plate and the interior space of the third body.;

[0023] In certain embodiments, the third gas bypass port may be formed at a fixed height from the third mounting plate.

[0024] In certain embodiments, a target gas outlet configured to discharge the target gas separated from the regeneration gas into the exterior of the gas condensing device may be formed on the housing above the third mounting plate.

[0025] In certain embodiments, a condensate outlet for supplying the condensate to a regeneration tower may be formed at a lower portion of the housing and a regeneration gas inlet for receiving the regeneration gas from the regeneration tower may be formed at an upper portion of the housing,

[0026] In embodiments according to the invention, the backflow device includes a backflow separator configured to separate a flow path of the condensate from a flow path of the evaporation gas.

[0027] In certain embodiments, the evaporation gas may be discharged from the condensate chamber through the at least one third gas flow opening and the third gas bypass port.

[0028] In certain embodiments, the at least one third gas flow opening may be positioned at the interior of the third body and the second liquid supply tube may be positioned at the exterior of the third body.

[0029] In certain embodiments, an end of the second liquid supply tube may extend close to a lower end of the housing.

[0030] According to an exemplary, unclaimed embodiment, a gas collection plant comprises an absorption column, a regeneration tower and a gas condensation device.

[0031] According to an exemplary embodiment of the present invention, a mounting space and heat loss of liquid moving between a condenser and a recirculation device can be reduced by mounting the condenser and the recirculation device in a housing.

[0032] Additionally, in certain embodiments, evaporative gas can be easily recondensed by separating a path through which condensate is supplied to a condensate chamber of a housing from a path through which evaporative gas is discharged from the condensate chamber and preventing flow interference between the condensate and the evaporative gas. Short character description Fig. 1 is a schematic drawing of a gas collection plant according to an exemplary, unclaimed embodiment. Fig. 2 is a schematic drawing of an absorption separator according to an exemplary embodiment of the present invention. Fig. 3 is a schematic drawing of an evaporator device according to an exemplary embodiment of the present invention. Fig. 4 is a schematic drawing of a regeneration separator according to an exemplary embodiment of the present invention. Fig. 5 is a schematic drawing of a gas condenser according to an exemplary embodiment of the present invention. Detailed description

[0033] "Rich absorbent liquid" in this specification and claims means absorbent liquid containing a large amount of gas to be removed or absorbent liquid after absorbing the gas and before regenerating the gas.

[0034] "Lean absorbent liquid" in this specification and claims means absorbent liquid from which gas has been separated or which contains a minimal amount or less of an object gas.

[0035] In this description and the claims, “regeneration” means a separation of gas from an absorbent liquid.

[0036] In this description and the claims, "regeneration gas" means gas that has been separated from absorbent liquid. "Object gas" in this description and the claims means gas to be regenerated, i.e., gas prior to regeneration.

[0037] “Target gas” in this specification and claims means gas that will be separated from the object gas and collected.

[0038] In this specification and claims, “treated gas” means gas remaining after the object gas has been dissolved in the absorbent liquid.

[0039] “Evaporation gas” in this description and claims means gas that has evaporated from the condensate.

[0040] In this description and the claims, an "upper side", "upper portion" or "upper end" includes "one side", "one end portion", "one side portion" or "one end" and a "lower side", "lower portion" or "lower end" includes the "other side", "other end portion", "other side portion" or "other end".

[0041] In addition, exemplary embodiments of the present invention can be applied to chemical absorption methods for separating gas by heating absorbent liquid after the gas is absorbed in the absorbent liquid, and chemical absorption methods for capturing carbon dioxide.

[0042] Exemplary embodiments of the present invention will hereinafter be described in detail with reference to the accompanying drawings.

[0043] Fig. 1 is a schematic drawing of a gas collection plant according to an exemplary, unclaimed embodiment. Fig. 2 is a schematic drawing of an absorption separator according to an exemplary embodiment of the present invention. Fig. 3 is a schematic drawing of an evaporator device according to an exemplary embodiment of the present invention. Fig. 4 is a schematic drawing of a regeneration separator according to an exemplary embodiment of the present invention. And Fig. 5 is a schematic diagram of a gas condensing apparatus according to an exemplary embodiment of the present invention.

[0044] As in Fig. 1, a gas collection plant 1 according to an exemplary, unclaimed embodiment comprises an absorption column 10, a regeneration tower 100 and a gas condenser 200.

[0045] The absorption column 10 is designed to dissolve object gas requiring regeneration in lean absorbent liquid to produce rich absorbent liquid, and includes an absorption column housing 2.

[0046] In certain embodiments, a space is formed in the absorption column housing 2, and a lean absorbent liquid supply 12, a plate 14, an absorption column rectifier 20, and an absorption separator 30 are arranged sequentially from an upper portion to a lower portion in the space. An absorbent liquid chamber 9 is formed at a lower portion of the absorption column housing 2, that is, below the absorption separator 30.

[0047] In certain embodiments, the lean absorbent liquid supply 12 is located at an upper portion in the absorption column housing 2 and is connected to a regeneration tower 100 through a lean absorbent liquid line 60. The lean absorbent liquid supply 12 is configured to supply the lean absorbent liquid received from the regeneration tower 100 to the absorption column housing 2 through the lean absorbent liquid line 60. The lean absorbent liquid supplied to the absorption column housing 2 flows downward by gravity toward the lower portion of the absorption column housing 2.

[0048] In certain embodiments, the plate 14 is mounted in the absorption column housing 2 below the lean absorbent liquid supply 12. The plate 14 is mounted across the absorption column housing 2, and at least one through-hole 16 is formed on the plate 14. The lean absorbent liquid falling to the lower portion of the absorption column housing 2 is evenly dispersed in the absorption column housing 2 by the plate 14 and the through-hole 16.

[0049] In certain embodiments, the absorption column equalizer 20 is arranged in the absorption column casing 2 below the plate 14. The absorption column equalizer 20 can be manufactured by twisting a thin and long wire into an irregular shape, but a method of manufacturing the absorption column equalizer 20 is not limited to this. On the contrary, a foamed plastic with high porosity can be used as the absorption column equalizer 20. The absorption column equalizer 20 equalizes the lean absorbent liquid to smooth its flow. In addition, the lean absorbent liquid and the object gas passing through the absorption column equalizer 20 meet with each other, and the object gas is dissolved in the lean absorbent liquid, thereby producing the rich absorbent liquid.

[0050] In certain embodiments, the absorption separator 30 is arranged in the absorption column housing 2 between the absorption column equalizer 20 and the absorption liquid chamber 9. The absorption separator 30 separates an inlet through which the rich absorbent liquid is supplied to the absorbent liquid chamber 9 from an outlet through which the object gas flows from the absorbent liquid chamber. For these purposes, the absorption separator 30 comprises, in certain embodiments, as in Fig. 2, a first mounting plate 34, a first body 32 and a first gas bypass port 38.

[0051] In certain embodiments, the first mounting plate 34 is disposed across the absorption column housing 2 below the absorption column equalizer 20. At least one first gas flow opening 36 and one first liquid feed tube 40 are formed on the first mounting plate 34.

[0052] In certain embodiments, the first body 32 is mounted on an upper surface of the first mounting plate 34 and extends upward. An upper surface of the first body 32 is blocked by a first roof 39 so that the dripping rich absorbent liquid does not enter an interior space of the first body 32 but collects on the first mounting plate 34. The rich absorbent liquid collected on the first mounting plate 34 is supplied to the absorbent liquid chamber 9 through the first liquid supply pipe 40. At this time, the first liquid supply pipe 40 extends toward the lower end of the absorbent liquid chamber 9 and close to a bottom of the absorption column housing 2.Therefore, the rich absorbent liquid is supplied below a surface of the rich absorbent liquid temporarily stored in the absorbent liquid chamber 9, thereby preventing the occurrence of large waves on the surface of the rich absorbent liquid temporarily stored in the absorbent liquid chamber 9 and facilitating filling level control of the rich absorbent liquid.

[0053] Additionally, in certain embodiments, the first body 32 encloses the at least one first gas flow opening 36 to prevent the rich absorbent liquid from being supplied directly through the first body 32 to the surface of the rich absorbent liquid temporarily stored in the absorbent liquid chamber 9.

[0054] In certain embodiments, the at least one first gas bypass port 38 is formed on one side of the first body 32, and an interior of the first body 32 is in fluid communication with an exterior of the first body 32. The at least one first gas bypass port 38 is formed at a predetermined height from the first mounting plate 34 such that the rich absorbent liquid collecting on the first mounting plate 34 is prevented from entering the interior of the first body 32 through the first gas bypass port 38.

[0055] In certain embodiments, the treated gas outlet 4, an object gas inlet 6 and an absorption column outlet 8 are further formed on the absorption column housing 2.

[0056] In certain embodiments, the treated gas outlet 4 is configured to discharge treated gas remaining after being dissolved in the absorbent liquid into the exterior of the absorption column 10 and is formed at the upper portion of the absorption column casing 2.

[0057] In certain embodiments, the object gas inlet 6 is configured to supply the object gas requiring regeneration to the absorption column 10 and is formed at the lower portion of the absorption column housing 2, that is, at the absorbent liquid chamber 9. Therefore, the object gas supplied to the absorbent liquid chamber 9 is dissolved in the absorbent liquid when passing through the absorption separator 30 and the absorption column rectifier 20, and the treated gas is discharged into the exterior of the absorption column 10 through the treated gas outlet 4 at the upper portion of the absorption column housing 2.

[0058] In certain embodiments, the absorption column outlet 8 is formed at a lower end portion of the absorption column casing 2. Therefore, the rich absorbent liquid temporarily stored in the absorbent liquid chamber 9 is supplied to the regeneration tower 100 through the absorption column outlet 8. For this purpose, the absorption column outlet 8 is connected to the regeneration tower 100 through a rich absorbent liquid line 50.

[0059] In certain embodiments, first and second pumps 52 and 62 are mounted on the rich absorbent liquid line 50 and the lean absorbent liquid line 60 to pump the rich absorbent liquid and the lean absorbent liquid, respectively. Additionally, at least one heat exchanger 70 and 80 is mounted on the rich absorbent liquid line 50 and the lean absorbent liquid line 60 to exchange heat between the lean absorbent liquid and the rich absorbent liquid.

[0060] In certain embodiments, the lean absorbent liquid is supplied to the upper portion of the absorption column 10 through the lean absorbent liquid supply 12, and the object gas is supplied to the absorbent liquid chamber 9 through the object gas inlet 6. The lean absorbent liquid flows downward toward the lower portion of the absorption column 10 by gravity. The object gas flows out of the absorbent liquid chamber 9 through the first gas flow port 36 and the first gas bypass port 38 of the absorption separator 30 and moves upward toward the upper portion of the absorption column 10. The lean absorbent liquid and the object gas meet at the absorption column equalizer 20, and the object gas is dissolved in the lean absorbent liquid to produce the rich absorbent liquid.

[0061] In certain embodiments, the rich absorbent liquid flows to the lower portion of the absorption column 10 and accumulates on the first mounting plate 34. Thereafter, the rich absorbent liquid is supplied to the lower portion of the absorbent liquid chamber 9 through the first liquid supply pipe 40. Therefore, no large wave is generated on the surface of the rich absorbent liquid stored in the absorbent liquid chamber 9, and filling level control of the rich absorbent liquid can be simplified.In addition, since a path through which the rich absorbent liquid is supplied to the absorbent liquid chamber 9 and a path through which the object gas flows out of the absorbent liquid chamber 9 are separated, a volatile component is prevented from being removed from the rich absorbent liquid due to the high linear velocity of the object gas, and a composition of the absorbent liquid is changed. As a result, deterioration in efficiency due to a change in the composition of the absorbent liquid can be prevented.

[0062] In certain embodiments, the treated gas remaining after being dissolved in the absorbent liquid moves upward toward the upper portion of the absorption column 10 and is discharged through the treated gas outlet 4 into the exterior of the absorption column 10.

[0063] As in Fig. 1, the regeneration tower 100 according to the exemplary embodiment includes a regeneration tower housing 102.

[0064] In certain embodiments, a space is formed in the regeneration tower housing 102, and a first rich absorbent liquid supply 112, a first regeneration tower equalizer 120, a second rich absorbent liquid supply 132, and a second regeneration tower equalizer 140 are sequentially arranged in the space. Additionally, a regeneration gas outlet 104 is formed at an upper end of the regeneration tower housing 102, and a rich absorbent liquid inlet 106 is formed at a lower end of the regeneration tower housing 102.

[0065] In certain embodiments, the first rich absorbent liquid supply 112 is disposed at an upper portion of the regeneration tower housing 102 and receives the rich absorbent liquid from the absorbent liquid chamber 9 through the rich absorbent liquid conduit 50 or receives condensate from the gas condensing device 200 or a heat exchanger (not shown) through a condensate conduit 109. The first rich absorbent liquid supply 112 supplies the rich absorbent liquid received through the rich absorbent liquid conduit 50 and / or the condensate received through the condensate conduit 109 to the regeneration tower housing 102. The rich absorbent liquid and / or condensate supplied to the first rich absorbent liquid supply 112 flows downward by gravity toward a lower portion of the regeneration tower housing 102.

[0066] In certain embodiments, a plate 114 is mounted in the regeneration tower housing 102 below the first rich absorbent liquid supply 112. The plate 114 is mounted across the regeneration tower housing 102, and at least one through-hole 116 is formed on the plate 114. The rich absorbent liquid and / or condensate falling toward the lower portion of the regeneration tower housing 102 is evenly dispersed in the regeneration tower housing 102 through the plate 114 and the through-hole 116.

[0067] In certain embodiments, the first regeneration tower equalizer 120 is disposed in the regeneration tower casing 102 below the plate 114. The first regeneration tower equalizer 120 may be manufactured by twisting a thin and long wire into an irregular shape, but a method of manufacturing the first regeneration tower equalizer 120 is not limited to this. On the other hand, a plastic foam having high porosity may be used as the first regeneration tower equalizer 120. The first regeneration tower equalizer 120 equalizes the rich absorbent liquid and / or condensate to smooth their flow.

[0068] In certain embodiments, the second rich absorbent liquid supply 132 is disposed in the regeneration tower housing 102 below the first regeneration tower equalizer 120 and receives the rich absorbent liquid from the absorbent liquid chamber 9 through the rich absorbent liquid conduit 50. The second rich absorbent liquid supply 132 supplies the rich absorbent liquid received through the rich absorbent liquid conduit 50 to the regeneration tower housing 102. The rich absorbent liquid supplied from the second rich absorbent liquid supply 132 flows downward by gravity toward the lower portion of the regeneration tower housing 102.

[0069] In certain embodiments, the rich absorbent liquid supplied to the second rich absorbent liquid supply 132 may be the same as or different from that supplied to the first rich absorbent liquid supply 112.

[0070] In certain embodiments, the plate 134 is mounted in the regeneration tower housing 102 below the second rich absorbent liquid supply 132. The plate 134 is mounted across the regeneration tower housing 102, and at least one through-hole 136 is formed on the plate 134. The rich absorbent liquid and / or condensate falling downward toward the lower portion of the regeneration tower housing 102 is evenly dispersed within the regeneration tower housing 102 by the plate and the through-hole 136.

[0071] In certain embodiments, the second regeneration tower equalizer 140 is disposed in the regeneration tower casing 102 below the plate 134. The second regeneration tower equalizer 140 may be manufactured by twisting a thin and long wire into an irregular shape, but a method for manufacturing the second regeneration tower equalizer 140 is not limited to this. On the contrary, a plastic foam with a high porosity may be used as the second regeneration tower equalizer 140. The second regeneration tower equalizer 140 equalizes the rich absorbent liquid and / or condensate supplied from the first rich absorbent liquid supply 112 to smooth its flow, and equalizes the rich absorbent liquid supplied from the second rich absorbent liquid supply 132 to smooth its flow.

[0072] In certain embodiments, the regeneration tower 100 further comprises an evaporator device. The evaporator device, as shown in Fig. 1, is arranged below the second regeneration tower equalizer 140 and includes a rich absorbent liquid tank 160, an evaporator 170, a regeneration separator 150, and a lean absorbent liquid tank 180. The evaporator device regenerates gas contained in the rich absorbent liquid supplied from the second regeneration tower equalizer 140.

[0073] In certain embodiments, the rich absorbent liquid tank 160 is as shown in Fig. 3, is fluidly connected to the regeneration tower housing 102 through a rich absorbent liquid connecting line 152 such that the rich absorbent liquid and / or condensate passing through the second regeneration tower equalizer 140 is supplied to the rich absorbent liquid tank 160 through the rich absorbent liquid connecting line 152. A rich absorbent liquid outlet 162 is formed at the lower portion of the rich absorbent liquid tank 160.

[0074] In certain embodiments, the evaporator 170 is mounted in the regeneration tower housing 102 below the second regeneration tower equalizer 140 and positioned above a bottom of the regeneration tower housing 102 by a predetermined distance. The evaporator 170 boils the rich absorbent liquid to separate regeneration gas from the rich absorbent liquid. The evaporator 170 includes a rich absorbent liquid inlet 106, a first operating fluid inlet 172, a first circulation line 176, a second circulation line 178, and a first operating fluid outlet 174.

[0075] In certain embodiments, the rich absorbent liquid inlet 106 is formed at a lower portion of the regeneration tower housing 102 and is in fluid communication with the rich absorbent liquid outlet 162 to receive the rich absorbent liquid from the rich absorbent liquid tank 160. Therefore, the rich absorbent liquid tank 160 supplies the rich absorbent liquid to the regeneration tower housing 102. As the rich absorbent liquid is supplied to the regeneration tower housing 102, a fill level of the rich absorbent liquid in the regeneration tower housing 102 increases, and the rich absorbent liquid is supplied to the evaporator 170.

[0076] In certain embodiments, the first operating fluid inlet 172 is formed at a position corresponding to the evaporator 170 of the regeneration tower housing 102 and supplies operating fluid to the evaporator 170. The operating fluid may be, but need not be limited to, water vapor generated in power plants or boiler equipment.

[0077] In certain embodiments, the first circulation line 176 is formed in the evaporator 170, and the operating fluid flows through the first operating fluid inlet 172 into the first circulation line 176. The first circulation line 176 is not in fluid communication with the interior of the regeneration tower housing 102.

[0078] In certain embodiments, the second circulation line 178 is formed in the evaporator 170 and is located near the first circulation line 176. Typically, a portion of the evaporator 170 other than the first circulation line 176 becomes the second circulation line 178. The second circulation line 178 is in fluid communication with the interior of the regeneration tower housing 102, so that the rich absorbent liquid is present in the second circulation line 178 as the fill level of the rich absorbent liquid supplied to the regeneration tower housing 102 increases. At this time, the rich absorbent liquid in the second circulation line 178 exchanges heat with the operating fluid flowing through the first circulation line 176. Therefore, the regeneration gas is separated from the rich absorbent liquid and thereby the lean absorbent liquid is arranged at an upper portion of the evaporator 170.In addition, the regeneration gas separated from the rich absorbent liquid moves upward in the regeneration tower housing 102.

[0079] In certain embodiments, the first operating fluid outlet 174 is formed at a position corresponding to the evaporator 170 of the regeneration tower housing 102, and the operating fluid circulating through the first circulation line 176 is discharged into the exterior of the regeneration tower housing 102 through the first operating fluid outlet 174.

[0080] For example, but not limited to, evaporator 170 is a heat exchanger that heats the rich absorbent liquid by exchanging heat with the operating fluid. Evaporator 170 may be an electrical wire that receives current and generates heat.

[0081] In certain embodiments, the regeneration separator 150 is mounted in the regeneration tower housing 102 between the second regeneration tower equalizer and the evaporator 170 and separates a feed path of the rich absorbent liquid into the evaporator 170 from an exhaust path of the regeneration gas generated in the evaporator 170. For these purposes, the regeneration separator 150, as shown in Fig. 4, a second mounting plate 190, a second body 192 and a second gas bypass port 196.

[0082] In certain embodiments, the second mounting plate 190 is disposed across the regeneration tower housing 102 below a connecting portion of the rich absorbent liquid connecting line 152 and the regeneration tower housing 102. At least one second gas flow opening 194 is formed on the second mounting plate 190.

[0083] In certain embodiments, the second body 192 is mounted to an upper surface of the second mounting plate 190 and extends upward. An upper surface of the second body 192 is blocked by a second roof 198 such that the dripping rich absorbent liquid and / or condensate do not enter an interior of the second body 192 and collect on the second mounting plate 190. The rich absorbent liquid that collects on the second mounting plate 190 moves through the rich absorbent liquid connection line 152 to the rich absorbent liquid tank 160. Additionally, the second body 192 encloses the at least one second gas flow opening 194 to prevent the rich absorbent liquid that collects on the second mounting plate 190 from being directly fed to the evaporator 170.

[0084] In certain embodiments, the at least one second gas bypass port 196 is formed on a side surface of the second body 192 and is in fluid communication with an interior of the second body 192 and an exterior of the second body 192. The at least one second gas bypass port 196 is formed at a predetermined height from the second mounting plate 190 such that the rich absorbent liquid collecting on the second mounting plate 190 is prevented from entering the interior of the second body 192 through the second gas bypass port 196. That is, a vertical position of the rich absorbent liquid connection line 152 is lower than that of the at least one second gas bypass port 196.

[0085] In certain embodiments, the lean absorbent liquid tank 180 is as shown in Fig. 3, the lean absorbent liquid connecting line 154 is in fluid communication with the regeneration tower housing 102, so that the lean absorbent liquid from which the regeneration gas is separated in the evaporator 170 flows through the lean absorbent liquid connecting line 154 into the lean absorbent liquid tank 180. A connecting portion of the lean absorbent liquid connecting line 154 and the regeneration tower housing 102 is positioned between the second mounting plate 190 and the evaporator 170. Therefore, the rich absorbent liquid regenerated in the evaporator 170 is supplied not to the regeneration separator 150 but to the lean absorbent liquid tank 180.

[0086] In certain embodiments, a lean absorbent liquid outlet 182 is formed at a lower end of the lean absorbent liquid tank 180 and connected to the lean absorbent liquid supply 12 through the lean absorbent liquid line 60. Therefore, the lean absorbent liquid in the lean absorbent liquid tank 180 is returned to the lean absorbent liquid supply 12 through the lean absorbent liquid line 60. Additionally, a support plate 184 is mounted in the lean absorbent liquid tank 180, and a level sensor and a pressure sensor may be mounted on the support plate 184. The fill level sensor detects a fill level of the lean absorbent liquid in the lean absorbent liquid tank 180 and the pressure sensor detects a pressure of the lean absorbent liquid tank 180.In addition, the lean absorbent liquid outlet 182 can be closed and opened based on detection results of the level sensor and the pressure sensor.

[0087] In certain embodiments, when the rich absorbent liquid from the absorption column 10 is supplied to the regeneration tower housing 102 through the first rich absorbent liquid supply 112 or the second rich absorbent liquid supply 32, the rich absorbent liquid flows downward by gravity. At this time, the flow of the rich absorbent liquid is directed by the first regeneration tower equalizer 120 or the second regeneration tower equalizer.

[0088] In certain embodiments, the rich absorbent liquid, represented by a solid arrow, can be Fig. 3, through the second roof 198 does not move into the interior of the second body 192, but moves onto the second mounting plate 190. Therefore, the rich absorbent liquid accumulates on the second mounting plate 190. When the filling level of the rich absorbent liquid accumulated on the second mounting plate 190 becomes higher than a height of a lower end of the rich absorbent liquid connecting pipe 152, the rich absorbent liquid is supplied to the rich absorbent liquid tank 160 through the rich absorbent liquid connecting pipe 152, and is then supplied to the regeneration tower casing 102 through the rich absorbent liquid outlet 162 and the rich absorbent liquid inlet 106.

[0089] As the filling level of the rich absorbent liquid in the regeneration tower housing 102 increases and the rich absorbent liquid is supplied to the evaporator 170, the rich absorbent liquid is heated, and the regeneration gas is separated from the rich absorbent liquid by heat exchange between the rich absorbent liquid and the operating fluid. The regeneration gas separated from the rich absorbent liquid, as indicated by a dotted arrow in Fig. 3, moves through the second gas outflow opening 194 and the second gas bypass port 196 to the exterior of the second body 192. The regeneration gas moves upward and is expelled through the regeneration gas outlet 104 to the exterior of the regeneration tower housing 102.

[0090] In certain embodiments, when the rich absorbent liquid is continuously supplied to the evaporator 170, the fill level of the lean absorbent liquid from which the regeneration gas is separated becomes higher. When the fill level of the lean absorbent liquid becomes higher than a height of the lower end of the lean absorbent liquid connecting line 154, the lean absorbent liquid is supplied to the lean absorbent liquid tank 180 through the lean absorbent liquid connecting line 154. The lean absorbent liquid supplied to the lean absorbent liquid tank 180 is returned through the lean absorption liquid outlet 182 of the absorption column 10.

[0091] As in Fig. 1, the gas condensing device 200 according to the embodiment of the invention comprises a housing 202.

[0092] In embodiments of the invention, a space is formed in the housing 202, a capacitor 210 is mounted in an upper portion of the space, and a return flow device 220 is mounted in a lower portion of the space.

[0093] Condenser 210 is mounted in the upper portion of housing 202 and configured to compensate for the regeneration gas and separate target gas from the condensate. In certain embodiments, condenser 210 includes a second operating fluid inlet 212, a third circulation line 216, a fourth circulation line 218, and a second operating fluid outlet 214.

[0094] In certain embodiments, the second operating fluid inlet 212 is formed at a position corresponding to the condenser 210 of the housing 202 and configured to supply the operating fluid to the condenser 210. The operating fluid may be, but is not limited to, coolant.

[0095] In certain embodiments, the third circulation line 216 is formed in the condenser 210, and the operating fluid flows through the second operating fluid inlet 212 into the third circulation line 216. The third circulation line 216 is not fully in fluid communication with the interior of the housing 202.

[0096] In certain embodiments, the fourth circulation line 218 is formed in the condenser 210 and is located near the third circulation line 216. Typically, a portion of the condenser 210 other than the third circulation line 216 becomes the fourth circulation line 218. The fourth circulation line 218 is in fluid communication with the interior of the housing 202, so that the regeneration gas supplied to the housing 102 passes through the fourth circulation line 218. At this time, the regeneration gas is condensed in the fourth circulation line 218 by heat exchange with the operating fluid passing through the third circulation line 216. Therefore, the target gas is separated from the condensate, and the condensate is supplied to the recirculation device 220.

[0097] In certain embodiments, the second operating fluid outlet 214 is formed at a position corresponding to the condenser 210 of the housing 102, and the operating fluid passing through the third circulation line 216 is discharged to the outside of the housing 102 through the second operating fluid outlet 214.

[0098] In embodiments according to the invention, the return flow device 220 comprises, as in Fig. 5, a condensate chamber 250 and a backflow separator 230.

[0099] In embodiments of the invention, the condensate chamber 250 is formed at the lower portion of the housing 202 and temporarily stores the condensate.

[0100] In embodiments according to the invention, the backflow separator 230 is arranged between the condenser 210 and the condensate chamber 250 in the housing 202. The backflow separator 230 separates an inlet through which the condensate is supplied to the condensate chamber 250 from an outlet through which the evaporation gas is expelled from the condensate chamber 250. For these purposes, the backflow separator 230 in embodiments according to the invention, as in Fig. 5, a third mounting plate 232, a third body 234 and a third gas bypass port 238.

[0101] In embodiments of the invention, the third mounting plate 232 is arranged across the housing 202 below the condenser 210. At least one third gas flow opening 236 and one second liquid supply tube 242 are formed on the third mounting plate 232.

[0102] In embodiments of the invention, the third body 234 is mounted on an upper surface of the third mounting plate 232 and extends upward. An upper end of the third body 234 is blocked by a third roof 240 so that dripping condensate does not enter an interior of the third body 234 but collects on the third mounting plate 232. The condensate collected on the third mounting plate 232 is supplied to the condensate chamber 250 through the second liquid supply pipe 242. At this time, the second liquid supply pipe 242 extends toward the lower end of the condensate chamber 250 and close to a bottom of the condensate chamber 250.Therefore, the condensate is supplied below a surface of the condensate temporarily stored in the condensate chamber 250, thereby preventing the occurrence of a large wave on the surface of the condensate temporarily stored in the condensate chamber 250 and facilitating a filling level control of the condensate.

[0103] Additionally, in certain embodiments, the third body 234 encloses the at least one third gas flow opening 236 to prevent the condensate from being fed through the third body 234 directly to the surface of the condensate temporarily stored in the condensate chamber 250.

[0104] In embodiments according to the invention, the at least one third gas bypass port 238 is formed on one side of the third body 234 and is in fluid communication with an interior of the third body 234 and with an exterior of the third body 234. The at least one third gas bypass port 238 is formed at a fixed height (or, in certain embodiments, a predetermined height) from the third mounting plate 232 such that condensate collecting on the third mounting plate 232 is prevented from entering the third body 234 through the third gas bypass port 238.

[0105] In certain embodiments, a regeneration gas inlet 204, a condensate outlet 206, and a target gas outlet 208 are formed on the housing 202.

[0106] In certain embodiments, the regeneration gas inlet 204 is formed at an upper end portion of the housing 202 and is in fluid communication with the regeneration gas outlet 104 of the regeneration tower housing 102. Therefore, the regeneration gas generated in the regeneration tower 100 is supplied to the upper end portion of the housing 202 through the regeneration gas outlet 104 and the regeneration gas inlet 204.

[0107] In certain embodiments, the condensate outlet 206 is formed at a lower end portion of the housing 202 and is connected to the first rich absorbent liquid supply 112 through the condensate line 109. Therefore, the condensate temporarily stored in the condensate chamber 250 is returned to the regeneration tower 100 through the condensate outlet 206 and the condensate line 109. A third pump 111 is mounted on the condensate line 109 to pump the condensate in the condensate chamber 250.

[0108] In certain embodiments, the target gas outlet 208 is formed between the condenser 210 and the backflow separator 230 on the housing 202. The target gas separated from the condensate in the condenser 210 is expelled from the gas condensation device 200 through the target gas outlet 208 and then collected in an additional tank.

[0109] In certain embodiments, the regeneration gas is supplied to the upper portion of the gas condensing device 200 through the regeneration gas inlet 204. The regeneration gas supplied to the gas condensing device 200 moves downward toward the lower portion of the gas condensing device 200 and passes through the condenser 210. At this time, the regeneration gas is condensed in the condenser 210 and separated into the condensate and the target gas.

[0110] In certain embodiments, the target gas is discharged through the target gas outlet 208 into the exterior of the gas condensation device 200, and the condensate is collected on the third mounting plate 232. Thereafter, the condensate is supplied to the lower portion of the condensate chamber 250 through the second liquid supply line 242. Therefore, no large wave is formed on the surface of the condensate stored in the condensate chamber 250, and condensate level control can be facilitated.

[0111] Additionally, in certain embodiments, the evaporation gas may be evaporated from the condensate temporarily stored in the condensate chamber 250. The evaporation gas is discharged from the condensate chamber 250 through the third gas flow port 236 of the backflow separator 230 and the third gas bypass port 238, and then recondensed in the condenser 210. At this time, since a path through which the condensate is supplied to the condensate chamber 250 is separated from a path through which the evaporation gas is discharged from the condensate chamber 250, flow interference between the condensate and the evaporation gas can be prevented, thereby facilitating recondensation of the evaporation gas.

[0112] In certain embodiments, the condensate temporarily stored in the condensate chamber 250 is returned to the regeneration tower 100 through the condensate line 109.

[0113] While this invention has been described in connection with what are presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary is intended to cover various modifications and equivalent arrangements falling within the spirit and scope of the appended claims.

Claims

[1] Gas condensation device (200) comprising: a housing (202); a condenser (210) mounted in an upper portion of the housing (202) and configured to condense regeneration gas, thereby forming condensate; and a return flow device (220) mounted in the housing (202) below the condenser (210) and configured to temporarily store the condensate and release evaporative gas evaporated from the condensate back into the condenser (210), wherein the gas condensation device (200) separates target gas from the condensate, wherein the return flow device (220) comprises: a condensate chamber (250) formed on the lower portion of the housing (202) and configured to temporarily store the condensate; and a backflow separator (230) arranged in the housing (202) between the condenser (210) and the condensate chamber (250), wherein the backflow separator (230) is designed to supply the condensate leaving the condenser (210) to the condensate chamber (250) and to release the evaporation gas evaporated from the condensate to an exterior space of the condensate chamber (250), wherein the backflow separator (230) is configured to separate an outlet through which the evaporation gas is discharged from the condensate chamber (250) from an inlet through which the condensate leaving the condenser (210) enters the condensate chamber (250), wherein the backflow separator (230) comprises: a mounting plate (232) mounted transversely across the housing (202) between the condenser (210) and the condensate chamber (250) and having at least one gas flow opening (236) formed thereon; a body (234) having a hollow column shape mounted on an upper surface of the mounting plate (232) and having an upper end blocked by a roof (240); at least one gas bypass port (238) formed on a side surface of the body (234) and enabling fluid communication between an interior of the body (234) and an exterior of the body (234); and a liquid supply tube (242) extending from the mounting plate (232) into the condensate chamber (250) and configured to supply the condensate to the condensate chamber (250), and wherein the at least one gas flow opening (236) enables fluid communication between an interior space of the housing (202) below the mounting plate (232) and the interior space of the body (234). [2] The gas condensing device (200) according to claim 1, wherein the gas bypass port (238) is formed at a fixed height from the mounting plate (232). [3] The gas condensing device (200) according to claim 1, wherein a target gas outlet (208) configured to discharge the target gas separately from the regeneration gas into an exterior space of the gas condensing device (200) is formed on the housing (202) above the mounting plate (232). [4] The gas condensing device (200) according to claim 1, wherein a condensate outlet (206) for supplying the condensate to a regeneration tower (100) is formed at a lower portion of the housing (202) and a regeneration gas inlet (204) for receiving the regeneration gas from the regeneration tower (100) is formed at an upper portion of the housing (202). [5] Gas condensation device (200) comprising: a housing (202); a condenser (210) mounted in an upper portion of the housing (202) and configured to condense regeneration gas, thereby forming condensate; and a return flow device (220) mounted in the housing (202) below the condenser (210) and configured to temporarily store the condensate and release evaporative gas evaporated from the condensate back into the condenser (210), wherein the gas condensation device (200) separates target gas from the condensate, wherein the backflow device (220) comprises a backflow separator (230) configured to separate a flow path of the condensate from a flow path of the evaporation gas, . wherein the return flow device (220) further comprises a condensate chamber (250) formed at a lower portion of the housing (202) and configured to temporarily store the condensate, wherein the backflow separator (230) is arranged within the housing (250) between the condenser (210) and the condensate chamber (250) and is designed to supply the condensate leaving the condenser (210) to the condensate chamber (250) and to release the evaporation gas evaporated from the condensate to an exterior space of the condensate chamber (250), and the backflow separator (230) is designed to separate an outlet through which the evaporation gas is discharged from the condensate chamber (250) from an inlet through which the condensate enters the condensate chamber (250) passing through the condenser (210), and wherein the backflow separator (230) comprises: a mounting plate (232) arranged transversely across the housing (202) between the condenser (210) and the condensate chamber (250) and having at least one gas flow opening (236) formed thereon; a body (234) having a hollow column shape mounted on an upper surface of the mounting plate (232) and having an upper end blocked by a roof (240); at least one gas bypass port (238) formed on a side surface of the body (234) and enabling fluid communication between an interior of the body (234) and an exterior of the body (234); and a liquid supply tube (242) extending from the mounting plate (232) into the condensate chamber (250) and configured to supply the condensate to the condensate chamber (250), wherein the evaporation gas is discharged from the condensate chamber (250) through the at least one gas flow opening (236) and the gas bypass port (238). [6] The gas condensing device (200) according to claim 5, wherein the gas bypass port (238) is formed at a fixed height from the mounting plate (232). [7] The gas condensing device (200) of claim 5, wherein the at least one gas flow opening (236) is positioned at an interior of the body (234) and the liquid supply tube (242) is positioned at the exterior of the body (234). [8] The gas condensing device (200) according to claim 5, wherein a target gas outlet (208) configured to discharge the target gas separately from the regeneration gas into the exterior of the gas condensing device (200) is formed on the housing (202) above the mounting plate (232). [9] The gas condensing device (200) according to claim 5, wherein one end of the liquid supply tube (242) extends close to a lower end of the housing (202). [10] The gas condensing device (200) according to claim 5, wherein a condensate outlet (206) for supplying the condensate to a regeneration tower (100) is formed at a lower portion of the housing (202) and a regeneration gas inlet (204) for receiving the regeneration gas from the regeneration tower (100) is formed at an upper portion of the housing (202).

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