Gas concentration and absorption liquid regeneration device and method thereof

Abstract

The present application relates to the regeneration device of absorption liquid, specifically disclose a kind of gas enrichment and absorption liquid regeneration device, it includes micro-interface oscillation capture tower and micro-interface oscillation regeneration tower, micro-interface oscillation capture tower includes capture tower body, and oscillation capture core pipe is equipped in capture tower body, and the gas inlet of oscillation capture core pipe is located in the upper side edge of oscillation capture core pipe, and its liquid inlet portion is sealingly connected with the inner periphery of capture tower body;Micro-interface oscillation regeneration tower includes regeneration tower body, and oscillation regeneration core pipe is equipped in regeneration tower body, and regeneration tower body is formed by partition plate normal temperature absorption liquid containing cavity and high temperature absorption liquid containing cavity, and first liquid inlet is located in the upper side edge of oscillation regeneration core pipe, and second liquid inlet is located on the outer periphery of oscillation regeneration core pipe middle portion.In addition, the present application also discloses a kind of gas enrichment and absorption liquid regeneration method.The gas enrichment and absorption liquid regeneration device of the present application has high absorption rate and regeneration rate, and low loss rate and cost.

Description

TECHNICAL FIELD

[0001] The present application relates to an absorption liquid regeneration device, in particular to a gas concentration and absorption liquid regeneration device and a method thereof. BACKGROUND

[0002] Addressing climate change has become a common challenge facing the world today.

[0003] In the existing capture method for reducing carbon emissions in flue gas, the chemical absorption method is the most widely used method in the industry, and the amine liquid absorption is recycled. The current industrial application of carbon dioxide treatment equipment is mainly spray tower and absorption tower, which uses chemical reagent absorption method to absorb carbon dioxide in flue gas. However, the traditional tower equipment has large floor area, high investment cost, and the gas-liquid mass transfer effect is limited. And because the absorption liquid cannot be fully recycled, the consumption of absorption liquid is large, and the absorption effect of carbon dioxide is also affected to a certain extent.

[0004] Therefore, it is necessary to provide a gas concentration and absorption liquid regeneration device to solve or overcome the above technical problems. SUMMARY

[0005] The first technical problem to be solved by the present application is to provide a gas concentration and absorption liquid regeneration device, which has high absorption rate and regeneration rate, and low loss rate and cost; the second technical problem to be solved by the present application is to provide a gas concentration and absorption liquid regeneration method.

[0006] In order to solve the above technical problems, the present application provides a gas concentration and absorption liquid regeneration device, comprising a micro-interface oscillation capture tower and a micro-interface oscillation regeneration tower, wherein the micro-interface oscillation capture tower comprises a capture tower body, an oscillation capture core pipe is arranged in the capture tower body, an air inlet of the oscillation capture core pipe is arranged on the upper side edge of the oscillation capture core pipe, so that flue gas can enter tangentially and form a spiral turbulent flow field in the oscillation capture core pipe, a liquid inlet part of the oscillation capture core pipe is sealingly connected with the inner circumferential surface of the capture tower body, so that normal-temperature absorption liquid can be pressed into the oscillation capture core pipe and broken into mist droplets under the action of the spiral turbulent flow field, so as to absorb specific gas in the flue gas; the micro-interface oscillation regeneration tower comprises a regeneration tower body, an oscillation regeneration core pipe is arranged in the regeneration tower body, the regeneration tower body is provided with a normal-temperature absorption liquid containing cavity and a high-temperature absorption liquid containing cavity through a partition plate, a first liquid inlet is arranged on the upper side edge of the oscillation regeneration core pipe, and a second liquid inlet is arranged on the middle outer circumferential surface of the oscillation regeneration core pipe; the normal-temperature waste liquid discharged from the micro-interface oscillation capture tower enters tangentially through the first liquid inlet, forms a spiral turbulent flow field, and cuts and forms high-temperature mist droplets from the high-temperature absorption liquid entering through the second liquid inlet; after the normal-temperature waste liquid and the high-temperature mist droplets contact and exchange heat, carbon dioxide in the normal-temperature waste liquid is desorbed and discharged, a part of the absorption liquid after desorption is cooled to form normal-temperature absorption liquid and is input into the micro-interface oscillation capture tower again, and another part of the absorption liquid is heated to form the high-temperature absorption liquid and is input into the micro-interface oscillation regeneration tower.

[0007] Preferably, the capture tower body is provided with a flue gas inlet, a first absorption liquid inlet and a second absorption liquid inlet for spraying normal-temperature absorption liquid into the liquid inlet part, a first gas outlet is arranged at the top of the capture tower body, a first liquid outlet is arranged at the bottom of the regeneration tower body, the first liquid outlet is connected with one end of a lean liquid water cooler through a pipeline, and the other end of the lean liquid water cooler forms a normal-temperature absorption liquid transmission path and a high-temperature absorption liquid transmission path.

[0008] Preferably, the normal-temperature absorption liquid transmission path comprises a first pipeline connected between the second absorption liquid inlet and the lean liquid water cooler and a first lean liquid pump arranged on the first pipeline; and the high-temperature absorption liquid transmission path comprises a second pipeline connected between the third absorption liquid inlet and the lean liquid water cooler, a lean liquid reboiler and a second lean liquid pump arranged on the second pipeline.

[0009] Preferably, the regeneration tower body is further provided with a waste liquid outlet, a third absorption liquid inlet and a second gas outlet, the waste liquid outlet and the third absorption liquid inlet are arranged on the side surface of the regeneration tower body, and the second gas outlet is arranged at the top of the regeneration tower body.

[0010] Preferably, the bottom of the capture tower body is also provided with a second liquid outlet, the second liquid outlet is connected with the waste liquid outlet through a third pipeline, and a rich liquid pump is arranged on the third pipeline.

[0011] Preferably, the normal-temperature absorption liquid is a normal-temperature lean amine liquid, the high-temperature absorption liquid is a high-temperature lean amine liquid, and the waste liquid is a rich amine liquid.

[0012] Preferably, the specific gas is carbon dioxide.

[0013] In addition, another aspect of the present application provides a gas concentration and absorption liquid regeneration method, which adopts the gas concentration and absorption liquid regeneration device in any of the above technical solutions, and comprises the following steps: step S1: passing the flue gas after dust removal and cooling into the micro-interface oscillation capture tower, and pumping the normal-temperature absorption liquid into the micro-interface oscillation capture tower, the flue gas generates a spiral turbulent flow field in the oscillation capture core pipe and reacts with the normal-temperature absorption liquid to form a micro-interface reaction efficient zone, thereby accelerating the absorption of the normal-temperature absorption liquid to the specific gas in the flue gas; step S2: pumping the normal-temperature waste liquid after reaction into the micro-interface oscillation regeneration tower through the third pipeline and forming a spiral turbulent flow field, and pumping the high-temperature absorption liquid into the micro-interface oscillation regeneration tower, the high-temperature absorption liquid is cut, broken and atomized in the oscillation regeneration core pipe and forms a micro-interface heat exchange efficient zone with the normal-temperature waste liquid, so that the normal-temperature waste liquid releases carbon dioxide after absorbing heat; step S3: the absorption liquid after heat exchange in the micro-interface oscillation regeneration tower is pumped into the micro-interface oscillation capture tower after being cooled by the lean liquid water cooler to participate in the step S1.

[0014] Preferably, the flue gas is discharged from the first exhaust port after decarburization in step S1, and part of the absorption liquid after heat exchange is heated by the lean liquid reboiler and pumped into the micro-interface oscillation regeneration tower by the second lean liquid pump (7) for recycling, and the other part is pumped into the micro-interface oscillation capture tower by the first lean liquid pump (4) for recycling.

[0015] Preferably, the carbon dioxide is discharged from the second exhaust port in step S2.

[0016] Through the above technical solutions, the present application has at least the following beneficial effects:

[0017] In the basic embodiment of the present application, the gas concentration and absorption liquid regeneration device of the present application comprises a micro-interface oscillation capture tower and a micro-interface oscillation regeneration tower, wherein the micro-interface oscillation capture tower comprises a capture tower body, an oscillation capture core pipe is arranged in the capture tower body, an air inlet of the oscillation capture core pipe is arranged at the upper side edge of the oscillation capture core pipe, and a liquid inlet part of the oscillation capture core pipe is sealingly connected with the inner circumferential surface of the capture tower body, so that flue gas can enter the oscillation capture core pipe tangentially through the air inlet and form a spiral turbulent flow field, so that the normal-temperature absorption liquid entering the oscillation capture core pipe forms droplets under the action of the spiral turbulent flow field, so as to accelerate the absorption of the specific gas in the flue gas, and the absorption rate is high; the micro-interface oscillation regeneration tower comprises a regeneration tower body, an oscillation regeneration core pipe is arranged in the regeneration tower body, the regeneration tower body forms a normal-temperature absorption liquid containing cavity and a high-temperature absorption liquid containing cavity through a partition plate, a first liquid inlet is arranged at the upper side edge of the oscillation regeneration core pipe, and a second liquid inlet is arranged on the middle outer circumferential surface of the oscillation regeneration core pipe; the normal-temperature waste liquid discharged from the micro-interface oscillation capture tower enters tangentially through the first liquid inlet to form a spiral turbulent flow field, the high-temperature absorption liquid entering from the second liquid inlet is sheared into high-temperature droplets, the waste gas in the normal-temperature waste liquid is desorbed after the normal-temperature waste liquid contacts and exchanges heat with the high-temperature droplets, and then is discharged, so as to realize the regeneration of the absorption liquid, and the regeneration rate is high.

[0018] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0020] Figure 1 is a structural schematic diagram of the gas concentration and absorption liquid regeneration device in the specific embodiment of the present application;

[0021] Figure 2 is a step diagram of the gas concentration and absorption liquid regeneration method in the specific embodiment of the present application.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1 micro-interface oscillation capture tower 101 oscillation capture core pipe

[0024] 102 air inlet 103 flue gas inlet

[0025] 104 first absorption liquid liquid inlet 105 second absorption liquid liquid inlet

[0026] 106 second liquid outlet 107 first gas outlet

[0027] 2 micro-interface oscillation regeneration tower 201 oscillation regeneration core pipe

[0028] 202 first liquid inlet 203 second liquid inlet

[0029] 204 first liquid outlet 205 waste liquid outlet

[0030] 206 third absorption liquid inlet 207 second exhaust port

[0031] 3 lean liquid water cooler 4 first lean liquid pump

[0032] 5 rich liquid pump 6 lean liquid reboiler

[0033] 7 second lean liquid pump DETAILED DESCRIPTION

[0034] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and the protection scope of the present application is not limited to the specific embodiments described below.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the description of the present application, it should be understood that the orientation terms are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] Reference Figure 1The application provides a gas concentration and absorption liquid regeneration device, which comprises a micro-interface oscillation trapping tower 1 and a micro-interface oscillation regeneration tower 2. The micro-interface oscillation trapping tower 1 comprises a trapping tower body, and an oscillation trapping core pipe 101 is arranged in the trapping tower body. An air inlet 102 of the oscillation trapping core pipe 101 is arranged on the upper side edge of the oscillation trapping core pipe 101, so that flue gas can enter tangentially and form a spiral turbulent flow field in the oscillation trapping core pipe 101. The liquid inlet part of the oscillation trapping core pipe 101 is sealingly connected with the inner circumferential surface of the trapping tower body, so that normal-temperature absorption liquid can be pressed into the oscillation trapping core pipe 101 and cut and broken into mist droplets under the action of the spiral turbulent flow field, so that the specific gas in the flue gas can be absorbed. The micro-interface oscillation regeneration tower 2 comprises a regeneration tower body, and an oscillation regeneration core pipe 201 is arranged in the regeneration tower body. The regeneration tower body forms a normal-temperature absorption liquid containing cavity and a high-temperature absorption liquid containing cavity through a partition plate. A first liquid inlet 202 is arranged on the upper side edge of the oscillation regeneration core pipe 201, and a second liquid inlet 203 is arranged on the middle outer circumferential surface of the oscillation regeneration core pipe 201. The normal-temperature waste liquid discharged from the micro-interface oscillation trapping tower 1 enters tangentially through the first liquid inlet 202 to form a spiral turbulent flow field, and the high-temperature absorption liquid entering from the second liquid inlet 203 is spirally cut to form high-temperature mist droplets. After the normal-temperature waste liquid and the high-temperature mist droplets contact and exchange heat, the carbon dioxide in the normal-temperature waste liquid is desorbed and discharged. After the normal-temperature waste liquid is desorbed, part of the absorption liquid can be cooled to form normal-temperature absorption liquid and then input into the micro-interface oscillation trapping tower 1, and the other part of the absorption liquid can be heated to form high-temperature absorption liquid and then input into the micro-interface oscillation regeneration tower 2 for recycling. The principle that the normal-temperature waste liquid forms a spiral turbulent flow field in the oscillation regeneration core pipe 201 is similar to the principle that the flue gas forms a spiral turbulent flow field in the oscillation trapping core pipe 101, and thus is not repeated here.

[0038] In the above basic embodiment of the present application, it should be noted that the inner cavity of the oscillation trapping core pipe 101 can be formed in a cylindrical shape, so that the tangential entering flue gas changes from linear motion to circular motion, and most of the rotating flue gas flows downward along the inner wall of the oscillation trapping core pipe 101 in a spiral shape from the cylinder, thereby forming a spiral turbulent flow field, and the mist-shaped normal-temperature absorption liquid reacts with the flue gas in the spiral turbulent flow field to form normal-temperature waste liquid droplets falling to the bottom of the micro-interface oscillation trapping tower 1, and the rotating descending outer-rotation flue gas flow continuously flows into the central part of the oscillation trapping core pipe 101 during the descending process, forming a centripetal radial gas flow, which constitutes the rotating upward inner-rotation flow. The rotation directions of the inner-rotation flow and the outer-rotation flow are the same, and the finally purified flue gas is discharged from the top of the micro-interface oscillation trapping tower 1 through the exhaust pipe. The gas concentration and absorption liquid regeneration device of the present application includes the micro-interface oscillation trapping tower 1 and the micro-interface oscillation regeneration tower 2, wherein the micro-interface oscillation trapping tower 1 can trap specific gases in the flue gas, for example, in the inside of the trapping tower body of the micro-interface oscillation trapping tower 1, the present application uses the reaction between the normal-temperature absorption liquid and the entering flue gas, so as to absorb the specific gases in the flue gas by the normal-temperature absorption liquid. After the normal-temperature absorption liquid absorbs the specific gases in the flue gas, it is converted into normal-temperature waste liquid, which enters the inside of the regeneration tower body of the micro-interface oscillation regeneration tower 2 and exchanges heat and desorbs with the high-temperature absorption liquid, thereby removing the carbon dioxide therein and realizing the regeneration of the absorption liquid. Specifically, the inside of the trapping tower body is provided with an oscillation trapping core pipe 101, the upper side edge of the oscillation trapping core pipe 101 is provided with an air inlet 102, which can be tangent to the side wall of the oscillation trapping core pipe 101, and the flue gas can enter the inside of the oscillation trapping core pipe 101 tangentially through the air inlet 102, so as to form a spiral turbulent flow field in the oscillation trapping core pipe 101, and the oscillation trapping core pipe 101 is provided with a liquid inlet portion, which is sealingly connected with the inner circumferential surface of the trapping tower body, and is used for introducing normal-temperature absorption liquid, so that the normal-temperature absorption liquid is atomized into droplets under the action of the spiral turbulent flow field in the oscillation trapping core pipe 101, it should be noted that an absorption reaction efficient zone can be formed between the liquid-phase droplets and the gas-phase flue gas micro-interface, for example, a carbon absorption reaction efficient zone can be formed between the liquid-phase droplets and the gas-phase flue gas micro-interface, and the droplets produce reciprocating oscillation under the action of the spiral turbulent flow field to further quickly absorb the specific gases in the flue gas in the oscillation region.The inside of the regenerative tower body is provided with an oscillation regeneration core pipe 201, and the inside of the regenerative tower body is formed with a normal-temperature absorption liquid containing cavity and a high-temperature absorption liquid containing cavity by a partition plate, the first liquid inlet 202 of the oscillation regeneration core pipe 201 is arranged in the normal-temperature absorption liquid containing cavity, and the second liquid inlet 203 is arranged in the high-temperature absorption liquid containing cavity, the normal-temperature waste liquid can enter the inside of the oscillation regeneration core pipe 201 tangentially through the first liquid inlet 202, so that a spiral turbulent flow field is generated in the inside of the oscillation regeneration core pipe 201, the high-temperature absorption liquid is introduced into the oscillation regeneration core pipe 201 through the second liquid inlet 203 and is broken into mist droplets under the action of the spiral turbulent flow field, and a micro-interface heat exchange high-efficiency zone is formed between the normal-temperature waste liquid and the high-temperature absorption liquid, the mist droplets generate reciprocating oscillation under the action of the spiral turbulent flow field to further rapidly exchange heat with the normal-temperature rich liquid, and the normal-temperature waste liquid is desorbed after absorbing heat, so that high-concentration carbon dioxide is released in the micro-interface oscillation capture tower 1, and at the same time, the normal-temperature waste liquid is converted into new absorption liquid after desorption, thereby realizing the effects of gas concentration and absorption liquid regeneration. The gas concentration and absorption liquid regeneration device has the advantages of high absorption rate and regeneration rate, low cost and the like.

[0039] Preferably, in order to cooperate with the gas inlet 102, a flue gas inlet 103 is arranged on the capture tower body, in order to be able to introduce normal-temperature absorption liquid into the liquid inlet part, a first absorption liquid inlet 104 and a second absorption liquid inlet 105 are arranged on the capture tower body, and in order to be able to discharge the decarburized flue gas from the capture tower body, a first gas outlet 107 is arranged at the top of the capture tower body. In order to be able to discharge the regenerated absorption liquid in the micro-interface oscillation regeneration tower 2 from the regeneration tower body, a first liquid outlet 204 is arranged at the bottom of the regeneration tower body, in order to realize the recycling of the regenerated absorption liquid, the first liquid outlet 204 is connected with one end of a lean liquid water cooler 3 through a pipeline, the lean liquid water cooler 3 can cool the regenerated absorption liquid, the processing capacity of the lean liquid water cooler 3 can be determined according to the flow and temperature of the regenerated absorption liquid, the other end of the lean liquid water cooler 3 is formed with a normal-temperature absorption liquid transmission path and a high-temperature absorption liquid transmission path, the normal-temperature absorption liquid transmission path can transport the normal-temperature absorption liquid passing through the lean liquid water cooler 3 into the micro-interface oscillation capture tower 1, and the high-temperature absorption liquid transmission path can transport the normal-temperature absorption liquid cooled by the lean liquid water cooler 3 into the micro-interface oscillation regeneration tower 2 after heating, so that the absorption liquid can be recycled through the normal-temperature absorption liquid transmission path and the high-temperature absorption liquid transmission path, and the use amount of the absorption liquid is reduced, thereby the gas concentration and absorption liquid regeneration device can save cost.

[0040] Preferably, the normal-temperature absorbent liquid transmission path comprises a first pipeline connected between the second absorbent liquid inlet 105 and the lean liquid water cooler 3, and a first lean liquid pump 4 arranged on the first pipeline; and the high-temperature absorbent liquid transmission path comprises a second pipeline connected between the third absorbent liquid inlet 206 and the lean liquid water cooler 3, and a lean liquid reboiler 6 and a second lean liquid pump 7 arranged on the second pipeline. The first lean liquid pump 4 can pump the normal-temperature absorbent liquid cooled by the lean liquid water cooler 3 into the micro-interface oscillation capture tower 1, and the pressure drop of the micro-interface oscillation capture tower 1 can be set to 1-5 KPa, so that the normal-temperature absorbent liquid can be sprayed into the micro-interface oscillation capture tower 1 from the first absorbent liquid inlet 104 and the second absorbent liquid inlet 105 under the action of the internal and external pressure difference. The second lean liquid pump 7 can pump the normal-temperature absorbent liquid cooled by the lean liquid water cooler 3 into the micro-interface oscillation regeneration tower 2 after being heated by the lean liquid reboiler 6, and the lean liquid reboiler 6 can heat the normal-temperature absorbent liquid to 125°C to form high-temperature absorbent liquid, and the processing capacity of the lean liquid reboiler 6 can be determined according to the flow rate and temperature of the absorbent liquid.

[0041] Preferably, the regeneration tower body is further provided with a waste liquid outlet 205, a third absorbent liquid inlet 206 and a second exhaust outlet 207, the waste liquid outlet 205 and the third absorbent liquid inlet 206 are arranged on the side of the regeneration tower body, and the second exhaust outlet 207 is arranged on the top of the regeneration tower body. The third absorbent liquid inlet 206 cooperates with the second inlet 203, and the pressure drop of the micro-interface oscillation regeneration tower 2 can be set to 10-50 KPa, so that the high-temperature absorbent liquid can be sprayed into the micro-interface oscillation regeneration tower 2 from the third absorbent liquid inlet 206 under the pressure difference, and then into the oscillation regeneration core pipe 201 from the second inlet 203.

[0042] Preferably, the bottom of the capture tower body is further provided with a second liquid outlet 106, the second liquid outlet 106 is connected with the waste liquid outlet 205 through a third pipeline, and a rich liquid pump 5 is arranged on the third pipeline, which can pump the normal-temperature waste liquid discharged from the micro-interface oscillation capture tower 1 into the micro-interface oscillation regeneration tower 2 through the waste liquid outlet 205. It should be noted that the waste liquid outlet 205 cooperates with the first inlet 202, so that the normal-temperature waste liquid can enter the oscillation regeneration core pipe 201 through the waste liquid outlet 205 and the first inlet 202 in sequence. The first inlet 202 can be arranged to be tangent to the oscillation regeneration core pipe 201, so that the normal-temperature waste liquid can enter the oscillation regeneration core pipe 201 through the first inlet 202 and form a spiral turbulent flow field.

[0043] Preferably, the normal-temperature absorbent liquid is normal-temperature lean amine liquid, the high-temperature absorbent liquid is high-temperature lean amine liquid, and the waste liquid is rich amine liquid.

[0044] Preferably, the specific gas is carbon dioxide. Therefore, the micro-interface oscillation capture tower 1 is used for removing carbon dioxide in flue gas, and the micro-interface oscillation regeneration tower 2 can release high-concentration carbon dioxide through desorption of the rich amine liquid and regenerate lean amine liquid.

[0045] Further, referring to Figure 2 , another aspect of the present application provides a gas concentration and absorption liquid regeneration method, which uses the gas concentration and absorption liquid regeneration device in any of the above technical solutions, comprising the following steps: step S1: passing the dust-removed and cooled flue gas into the micro-interface oscillation capture tower 1, and pumping the normal-temperature absorption liquid into the micro-interface oscillation capture tower 1, the flue gas generates a spiral turbulent flow field in the oscillation capture core pipe 101 and reacts with the normal-temperature absorption liquid to form a micro-interface reaction high-efficiency zone, thereby accelerating the absorption of the normal-temperature absorption liquid to the specific gas in the flue gas; step S2: pumping the reacted normal-temperature waste liquid into the micro-interface oscillation regeneration tower 2 through the third pipeline and forming a spiral turbulent flow field, and pumping the high-temperature absorption liquid into the micro-interface oscillation regeneration tower 2, the high-temperature absorption liquid enters the oscillation regeneration core pipe 201 and forms a micro-interface heat exchange high-efficiency zone with the normal-temperature waste liquid, so that the normal-temperature waste liquid is desorbed after being heated to release carbon dioxide; step S3: the heat-exchanged absorption liquid in the micro-interface oscillation regeneration tower 2 is pumped into the micro-interface oscillation capture tower 1 after being cooled by the lean liquid water cooler 3 to participate in step S1.

[0046] Preferably, the flue gas is discharged from the first exhaust port 107 after decarburization in step S1, and the heat-exchanged absorption liquid is cooled by the lean liquid water cooler 3 in step S2, part of which is heated by the lean liquid reboiler 6 and then pumped into the micro-interface oscillation regeneration tower 2 by the second lean liquid pump 7 for recycling, and the other part is pumped into the micro-interface oscillation capture tower 1 by the first lean liquid pump 4 for recycling.

[0047] Preferably, the carbon dioxide is discharged from the second exhaust port 207 in step S2.

[0048] The following describes one specific embodiment of the gas concentration and absorption liquid regeneration method of the present application in detail, so as to better understand the technical solutions of the present application.

[0049] (1) The dust-removed and cooled flue gas is passed into the micro-interface oscillation capture tower 1 from the flue gas inlet 103, and then tangentially enters the oscillation capture core pipe 101 from the gas inlet 102, and the normal-temperature lean amine liquid in the micro-interface oscillation regeneration tower 2 is pumped into the micro-interface oscillation capture tower 1; the flue gas generates a spiral turbulent flow field in the oscillation capture core pipe 101, the normal-temperature lean amine liquid is cut, broken and atomized into droplets under the action of the spiral turbulent flow field, a carbon absorption reaction high-efficiency zone is formed between the liquid-phase droplets and the gas-phase flue gas micro-interface, and the liquid-phase droplets generate reciprocating oscillation under the action of the spiral turbulent flow field to further quickly absorb the carbon dioxide in the oscillation region.

[0050] (2) The lean amine solution at normal temperature after absorbing carbon dioxide is converted into rich amine solution at normal temperature, and under the action of the rich liquid pump 5, enters the micro-interface oscillation regeneration tower 2 from the waste liquid port 205, and then enters the oscillation regeneration core pipe 201 tangentially from the first liquid inlet 202. The rich amine solution at normal temperature generates a spiral turbulent field in the oscillation regeneration core pipe 201. The high-temperature lean amine solution in the oscillation regeneration core pipe 201 is broken into micro-droplets under the action of the spiral turbulent field, so that a micro-interface heat exchange high-efficiency zone is generated between the rich amine solution at normal temperature and the micro-droplets. The rich amine solution at normal temperature is desorbed after absorbing heat, and the regeneration of the amine solution is realized while the high-concentration carbon dioxide is stripped out.

[0051] (3) The high-concentration carbon dioxide stripped out from the rich amine solution at normal temperature is discharged from the second exhaust port 207; the regenerated lean amine solution is cooled by the lean liquid water cooler 3, and then a part of it is pumped into the micro-interface oscillation capture tower 1 for recycling, and the other part of it is heated by the lean liquid reboiler 6, and then exchanges heat with the rich amine solution at normal temperature in the micro-interface oscillation regeneration tower 2 device for recycling.

[0052] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection range of the present application.

[0053] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present application.

[0054] In addition, various different embodiments of the present application can also be combined in any manner, as long as they do not deviate from the idea of the present application, and they should also be considered as disclosed by the present application.

Claims

1. A gas concentration and absorbent regeneration device, characterized in that, The system includes a micro-interface oscillating trap tower (1) and a micro-interface oscillating regeneration tower (2). The micro-interface oscillating trap tower (1) includes a trap tower body. An oscillating trap core tube (101) is provided inside the trap tower body. The air inlet (102) of the oscillating trap core tube (101) is located on the upper side edge of the oscillating trap core tube (101) so that the flue gas can enter tangentially and form a spiral turbulent flow field inside the oscillating trap core tube (101). The liquid inlet of the oscillating trap core tube (101) is sealed to the inner circumferential surface of the trap tower body so that room temperature absorption pressure can be injected into the oscillating trap core tube (101) and cut and broken into droplets under the action of the spiral turbulent flow field so as to absorb specific gases in the flue gas. The micro-interface oscillating regeneration tower (2) includes a regeneration tower body, and an oscillating regeneration core tube (201) is provided inside the regeneration tower body. The regeneration tower body forms a room temperature absorbent liquid and a high temperature absorbent liquid through a partition. The first inlet (202) is located on the upper side edge of the oscillating regeneration core tube (201), and the second inlet (203) is located on the middle outer circumferential surface of the oscillating regeneration core tube (201). The room temperature waste liquid discharged from the micro-interface oscillating collection tower (1) enters tangentially through the first inlet (202) to form a spiral turbulent flow field. The high temperature absorbent liquid entering from the second inlet (203) is spun and cut to form high temperature droplets. After the room temperature waste liquid and the high temperature droplets come into contact and exchange heat, the carbon dioxide in the room temperature waste liquid is desorbed and discharged. After the desorbed part of the absorbent liquid is cooled, it forms room temperature absorbent liquid and is reintroduced into the micro-interface oscillating collection tower (1). The other part of the absorbent liquid is heated to form the high temperature absorbent liquid and enters the micro-interface oscillating regeneration tower (2). The collection tower body is provided with a flue gas inlet (103) and a first absorbent inlet (104) and a second absorbent inlet (105) for injecting room temperature absorbent into the liquid inlet section. The top of the collection tower body is provided with a first exhaust port (107), and the bottom of the regeneration tower body is provided with a first drain port (204). The first drain port (204) is connected to one end of a lean liquid cooler (3) through a pipe. The other end of the lean liquid cooler (3) forms a room temperature absorbent transfer path and a high temperature absorbent transfer path. The ambient temperature absorbent transfer path includes a first pipe connecting the second absorbent inlet (105) and the lean liquid cooler (3) and a first lean liquid pump (4) installed on the first pipe. The high-temperature absorbent transfer path includes a second pipe connecting the third absorbent inlet (206) and the lean liquid cooler (3), as well as a lean liquid reboiler (6) and a second lean liquid pump (7) installed on the second pipe. The regeneration tower body is also provided with a waste liquid inlet (205), a third absorbent liquid inlet (206), and a second exhaust outlet (207). The waste liquid inlet (205) and the third absorbent liquid inlet (206) are located on the side of the regeneration tower body, and the second exhaust outlet (207) is located on the top of the regeneration tower body.

2. The gas concentration and absorbent regeneration apparatus according to claim 1, characterized in that, The regeneration tower body is also provided with a waste liquid inlet (205), a third absorbent liquid inlet (206), and a second exhaust outlet (207). The waste liquid inlet (205) and the third absorbent liquid inlet (206) are located on the side of the regeneration tower body, and the second exhaust outlet (207) is located on the top of the regeneration tower body.

3. The gas concentration and absorbent regeneration apparatus according to claim 2, characterized in that, The bottom of the collection tower is also provided with a second drain port (106), which is connected to the waste liquid port (205) through a third pipe, and a rich liquid pump (5) is provided on the third pipe.

4. The gas concentration and absorbent regeneration apparatus according to any one of claims 1-3, characterized in that, The room temperature absorbent is a room temperature lean amine solution, the high temperature absorbent is a high temperature lean amine solution, and the waste liquid is a rich amine solution.

5. The gas concentration and absorbent regeneration apparatus according to any one of claims 1-3, characterized in that, The specific gas is carbon dioxide.

6. A method for gas concentration and absorbent regeneration, characterized in that, The gas concentration and absorbent regeneration apparatus according to any one of claims 1-5 includes the following steps: Step S1: The flue gas after dust removal and cooling is introduced into the micro-interface oscillating collection tower (1), and the room temperature absorbent is pumped into the micro-interface oscillating collection tower (1). The flue gas generates a spiral turbulent flow field in the oscillating collection core tube (101) and reacts with the room temperature absorbent to form a micro-interface reaction high efficiency zone, thereby accelerating the absorption of specific gases in the flue gas by the room temperature absorbent. Step S2: The room temperature waste liquid after reaction is pumped into the micro-interface oscillating regeneration tower (2) through the third pipeline and a spiral turbulent flow field is formed. At the same time, the high temperature absorbent is pumped into the micro-interface oscillating regeneration tower (2). The high temperature absorbent enters the oscillating regeneration core tube (201), is cut, broken and atomized, and forms a micro-interface heat exchange high efficiency zone with the room temperature waste liquid. Thus, the room temperature waste liquid absorbs heat and desorbs to release carbon dioxide. Step S3: The absorbent liquid after heat exchange in the micro-interface oscillating regeneration tower (2) is cooled by the lean liquid cooler (3) and then pumped into the micro-interface oscillating trap tower (1) to participate in step S1.

7. The gas concentration and absorbent regeneration method according to claim 6, characterized in that, After decarbonization, the flue gas in step S1 is discharged from the first exhaust port (107). After the heat exchanged absorbent in step S3 is cooled by the lean liquid cooler (3), a portion of it is heated by the lean liquid reboiler (6) and then pumped into the micro-interface oscillation regeneration tower (2) by the second lean liquid pump (7) for recycling. The other portion is pumped into the micro-interface oscillation trapping tower (1) by the first lean liquid pump (4) for recycling.

8. The gas concentration and absorbent regeneration method according to claim 7, characterized in that, The carbon dioxide described in step S2 is discharged from the second exhaust port (207).

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