Carbon dioxide trapping device and equipment thereof

Abstract

The invention relates to the technical field of carbon dioxide trapping, in particular to a carbon dioxide trapping device and equipment thereof. The disclosed carbon dioxide trapping device comprises an absorption tower and a recovery tower, the absorption tower is provided with a first shell; a first ejector is arranged in the first shell and is used for ejecting a chemical solution, and the chemical solution reacts with CO2 flowing into the first shell; the recovery tower is provided with a second shell; the second shell is communicated with the first shell; a recycling pool is arranged at the bottom end of the second shell and is used for recycling reaction products in the first shell. According to the invention, chemical solution drifting drops generated in the absorption tower can be effectively recovered, the energy consumption and the cost are reduced, unreacted harmful substances and harmful substances generated by the reaction in the absorption tower can be effectively recovered, and the harm to the environment is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon dioxide capture, and in particular relates to a carbon dioxide capture device and equipment thereof. Background Art

[0002] Liquid direct air capture (L-DAC) is an emerging technology that uses chemical solutions to capture carbon dioxide from the air (CO2). Chemical solutions include alkaline hydroxide solutions (KOH, NaOH, etc.), amine solutions (alkanolamine, ethanolamine, etc.), and amino acid salt solutions. The chemical solution travels through a pipeline to an air absorption tower, where it captures CO2 from the air inlet, forming a CO2 absorption liquid. This solution then undergoes a reduction step to release the CO2. The reduced chemical solution is then used to capture CO2 from the air inlet.

[0003] Currently, capturing carbon dioxide from air in air absorption towers is inefficient, and the air outlet carries a significant amount of chemical solution. The chemical solution flows from top to bottom within the absorption tower, and the area and duration of contact between the liquid and air determine the absorption efficiency of the tower. Furthermore, the spraying device within the absorption tower sprays onto the side walls, causing the chemical solution to flow down the walls, reducing capture efficiency and consuming excessive energy. Furthermore, the air outlet carries away some of the chemical solution, resulting in reduced capture efficiency, excessive energy consumption, and chemical droplets that can seriously damage the surrounding environment. Summary of the Invention

[0004] In light of this, the present invention aims to address, at least to some extent, one of the technical problems in the related art. To this end, the present invention provides a carbon dioxide capture device and apparatus that can effectively recover chemical solution drippings generated in an absorption tower, reducing energy consumption and costs. It can also effectively recover hazardous substances produced by reactions in the absorption tower, preventing further harm to the environment.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0006] According to one aspect of the present invention, the present invention provides a carbon dioxide capture device, comprising:

[0007] An absorption tower is provided with a first shell;

[0008] A first injector is provided in the first shell, and the first injector is used to inject a chemical solution to react with the CO2 flowing into the first shell;

[0009] The recovery tower is provided with a second shell; the second shell is connected to the first shell;

[0010] A recovery pool is provided at the bottom end of the second shell, and the recovery pool is used to recover at least part of the reaction products in the first shell.

[0011] In some embodiments, the recovery tower further includes a second ejector;

[0012] The second injector is provided at the top end of the second shell, and the second injector includes a plurality of second injection pipes, each of which is provided with a spray hole;

[0013] The second ejector sprays liquid through the plurality of ejection holes in the second ejection pipes. The liquid reacts with the droplets generated in the first shell and is recovered into the recovery pool.

[0014] In some embodiments, the recovery tower is further provided with a second inlet;

[0015] The second inlet is provided at the top end of the side wall of the second shell, the second inlet is connected to the second injection pipe, and / or the second injection pipe is connected to the recovery tank;

[0016] The second spray pipe splashes the liquid in the recovery tank through the spray hole.

[0017] In some of the embodiments, the absorption tower further comprises a packing member;

[0018] The fillers are respectively arranged in the first shell, and are used to react the air flowing into the first shell with the chemical solution, and to transfer the air after adsorbing CO2 to the second shell.

[0019] In some embodiments, the top end of the filler member is provided with an opening;

[0020] The first injector includes a plurality of first injection pipes, each of which is provided with a spray hole;

[0021] When the first spray pipe sprays the chemical solution from the spray hole to the filler, the chemical solution flows from top to bottom in the filler through the opening and reacts with CO2 in the air.

[0022] In some embodiments, the absorption tower further comprises a recovery plate;

[0023] The recovery plate is provided at the top end of the inner side wall of the first shell;

[0024] The recovery plate includes a recovery plate main part and a recovery plate extension part. The recovery plate main part is in contact with the inner wall of the first shell, and one end of the recovery plate extension part is suspended between the top end of the first shell and the filler.

[0025] In some of the embodiments, the absorption tower further comprises an absorption tank;

[0026] The absorption tank is used to collect the product after the chemical solution and CO2 react.

[0027] In some embodiments, a first inlet is provided at a top end of the first housing side wall;

[0028] The first inlet is connected to the first injection pipe and the absorption tank respectively;

[0029] The absorption tank is also used to store a chemical solution that reacts with CO2. The chemical solution flows from the first inlet into the first spray pipe for sputtering.

[0030] In some of the embodiments, a communication pipe is further included;

[0031] The communicating pipe is provided between the absorption tower and the recovery tower, and is communicated with the absorption tower and the recovery tower respectively;

[0032] A fan is further provided in the communicating pipe, and the fan is used to transport at least part of the reaction products in the first shell to the second shell.

[0033] According to a second aspect of the present invention, the present invention provides a carbon dioxide capture device, comprising: the carbon dioxide capture device described in any one embodiment of the first aspect of the present invention.

[0034] The implementation of the technical solution of the present invention has at least the following beneficial effects:

[0035] 1. In the present invention, a recovery tower is provided at one end of the absorption tower. After the chemical solution is used to absorb carbon dioxide in the absorption tower, the chemical solution dripping is absorbed and collected in the recovery tower, thereby avoiding the harm of the chemical solution dripping to the environment. Moreover, the chemical solution is sprayed to fully contact the carbon dioxide, thereby improving the absorption efficiency of carbon dioxide.

[0036] 2. In a preferred implementation manner of some embodiments of the present invention, multiple packing pieces are provided so that the chemical solution flows from the top end of each packing piece into the packing piece, and then flows out from the other end of the packing piece to another packing piece, thereby increasing the contact time between the chemical solution and carbon dioxide, allowing the chemical solution to react more fully with carbon dioxide, and improving the absorption rate of carbon dioxide.

[0037] 3. In a preferred implementation manner of some embodiments of the present invention, by arranging a recovery plate on the inner wall of the first shell of the absorption tower, the chemical solution sprayed from the top of the first shell can be drained to the top of the filler, while preventing the chemical solution from being sprayed onto the inner wall of the absorption tower, causing corrosion of the inner wall by the chemical solution, thereby improving the service life of the absorption tower.

[0038] 4. In a preferred implementation of some embodiments of the present invention, a recovery tower is used to spray part of the reaction products from the top of the recovery tower, so that a waterfall-like liquid flow is formed at the outlet of the recovery tower, thereby greatly reducing the discharge of chemical solution droplets, effectively purifying the air, and reducing harm to the environment.

[0039] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0041] Figure 1 Schematic diagram of the structure of the carbon dioxide capture device provided by the present invention;

[0042] Figure 2 is a front cross-sectional view of a carbon dioxide capture device provided by the present invention;

[0043] Figure 3 2 is a schematic side view of the structure of the absorption tower of the carbon dioxide capture device provided by the present invention;

[0044] Figure 4 It is a schematic diagram of the side structure of the recovery tower of the carbon dioxide capture device provided by the present invention.

[0045] Description of reference numerals:

[0046] 100 - absorption tower; 110 - first inlet; 120 - absorption tank; 130 - first ejector; 140 - packing element; 150 - recovery plate;

[0047] 200—recovery tower; 210—second inlet; 220—recovery tank; 230—second ejector;

[0048] 300—Connecting pipe; 310—Fan.

[0049] The above drawings illustrate specific embodiments of the present invention, which will be described in more detail below. These drawings and the accompanying description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0050] The present invention will be further described below with reference to specific examples. It should be understood that these examples are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

[0051] The endpoints of the ranges and any values ​​disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range or the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0052] Unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form new technical solutions.

[0053] Unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0054] Unless otherwise specified, all steps of the present invention may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0055] Unless otherwise specified, the terms "include" and "comprising" used in the present invention may be open-ended or closed-ended. For example, "include" and "comprising" may mean that other components not listed may also be included or that only the listed components are included.

[0056] Using chemical solutions, such as alkaline hydroxide solutions (KOH or NaOH, etc.), amine solutions (alkanolamine or ethanolamine, etc.), or amino acid salt solutions, to absorb carbon dioxide offers advantages such as fast absorption rates and mature recovery conditions. However, using chemical solutions for liquid recovery often results in insufficient contact between the chemical solution and carbon dioxide, resulting in waste of the chemical solution. Furthermore, when using chemical solutions to recover carbon dioxide, chemical solution droplets are easily generated, which can drift into the air and pose a threat to the environment.

[0057] In view of this, the present invention provides a carbon dioxide capture device and equipment thereof, which can effectively recover the chemical solution dripping produced in the absorption tower, reduce energy consumption and cost, and at the same time effectively recover the harmful substances produced by the reaction in the absorption tower to avoid further harm to the environment.

[0058] In some embodiments of the present invention, a carbon dioxide capture device is provided, comprising: an absorption tower 100 and a recovery tower 200; the absorption tower 100 is provided with a first shell; a first injector 130 is provided in the first shell, and the first injector 130 is used to inject a chemical solution to react with the CO2 flowing into the first shell;

[0059] refer to Figure 1 The absorption tower 100 is provided with a first shell, which has a storage space. Carbon dioxide gas is circulated into the storage space and reacts with the chemical solution placed in the storage space, and part of the reaction product is discharged from the storage space. The first shell can be set to be open at both ends to facilitate the inflow and outflow of carbon dioxide gas. Of course, the size of the carbon dioxide outflow port of the first shell can also be designed to be smaller than the inflow port. In this way, the outflow rate of carbon dioxide can be reduced, allowing carbon dioxide and chemical solution to react more fully, thereby improving carbon dioxide absorption efficiency.

[0060] In order to ensure more complete contact between the chemical solution and carbon dioxide, a first injector 130 is provided at the top of the first shell. The first injector 130 can spray the chemical solution to form a "waterfall" effect. When the carbon dioxide entering the first shell passes through the jet flow, the carbon dioxide can fully react with the chemical solution. Part of the reaction products flows to the bottom of the first shell, and part of the products flows out from the outflow port of the first shell, thereby effectively absorbing the carbon dioxide.

[0061] In some embodiments, the recovery tower 200 is provided with a second shell; the second shell is connected to the first shell; a recovery tank 220 is provided at the bottom end of the second shell, and the recovery tank 220 is used to recover at least part of the reaction products in the first shell.

[0062] refer to Figure 1 The recovery tower 200 is provided with a second shell, which has a storage space therein. The outflow port of the first shell is connected to the inflow port of the second shell, so that part of the products in the first shell flows into the second shell and is collected in the second shell. Of course, the second shell can also be configured to be open at both ends, with the inflow port of the second shell smaller than the outflow port. In this way, the flow rate of some chemical products, such as chemical solution dripping, flowing from the first shell to the second shell is reduced, so that some of the chemical products are recovered in the recovery tank 220 at the bottom of the second shell, thereby preventing the chemical solution dripping from harming the environment and further purifying the air.

[0063] Furthermore, in some preferred embodiments, a mesh component can be provided at the outflow port of the second shell. The mesh component can be made of a polymer material, such as polyvinylidene fluoride, polyurethane, etc. When the chemical solution drips out, the mesh component can block it and discharge the recovered air to the outside. The chemical solution drips can be drained into the recovery pool 220 along the mesh component.

[0064] The present invention provides a carbon dioxide capture device. A recovery tower is provided at one end of an absorption tower. After a chemical solution is used in the absorption tower to absorb carbon dioxide, the chemical solution dripping is absorbed and collected in the recovery tower, thereby avoiding the harm of the chemical solution dripping to the environment. Moreover, the chemical solution is sprayed to ensure that the chemical solution and carbon dioxide are in full contact, thereby improving the carbon dioxide absorption efficiency.

[0065] In some embodiments, the recovery tower 200 also includes a second ejector 230; the second ejector 230 is arranged at the top end of the second shell, and the second ejector 230 includes a plurality of second ejection pipes, each of which is provided with a spray hole; the second ejector 230 sputters liquid through the spray holes in the plurality of second ejection pipes, and the liquid reacts with the droplets generated in the first shell and is recovered into the recovery pool 220.

[0066] refer to Figure 2 The second ejector 230 is arranged at the top of the second shell. The second ejector 230 can spray the reaction product in the recovery tank 220 or the chemical solution, thereby forming a "waterfall" flow in the second shell. The reaction product in the recovery tank 220 contains a small amount of unreacted chemical solution. The spray "waterfall" flow can effectively prevent the chemical solution flowing out of the first shell from dripping and flowing out into the environment. At the same time, it can also effectively purify the gas flowing out of the first shell, so that the air flowing out of the recovery tower 200 is harmless.

[0067] The second injector 230 can also be provided with a plurality of second injection pipes arranged side by side, and the second injection pipes are connected to the recovery pool 220. The recovery pool 220 includes water and chemical solution droplets (including chemical solution, products after the reaction of chemical solution and carbon dioxide) flowing into the first shell. The second injection pipe splashes the liquid in the recovery pool 220 from the spray hole to form a "waterfall"-like flow, effectively preventing the droplets from flowing out into the external environment.

[0068] In some embodiments, the recovery tower 200 further includes a second inlet 210; the second inlet 210 is located at the top of the second shell side wall, the second inlet 210 is connected to the second injection pipe, and / or the second injection pipe is connected to the recovery pool 220; the second injection pipe sputters the liquid in the recovery pool 220 through the spray hole.

[0069] refer to Figure 1 and Figure 2 The second inlet 210 is arranged at the top of the side wall of the second shell. One end of the second inlet 210 is connected to the second injection pipe, and the other end of the second inlet 210 is connected to the recovery tank 220, so as to realize the recycling of part of the reaction products in the recovery tank 220, improve the recovery and absorption efficiency, save costs and reduce energy consumption.

[0070] In some embodiments, the absorption tower 100 further includes a filler 140 ; ​​the filler 140 is disposed in the first shell, and the filler 140 is used to react the air and chemical solution in the first shell by mass transfer, and to transfer the air after adsorbing CO 2 to the second shell.

[0071] refer to Figure 2 and Figure 3 The filler 140 can be set to a plurality of tubular objects with irregular cross-sectional shapes and sizes or regular cross-sectional shapes and sizes. The filler 140 is arranged and stacked in the horizontal direction to form a "honeycomb" structure. The filler 140 is installed along the inlet port and the outflow port of the first shell. The chemical solution injected from the first injector 130 can flow through the filler 140. When carbon dioxide is transferred from the filler 140, the chemical solution passes vertically through the filler 140, extending the path and time of the chemical solution flowing from the top of the first shell to the bottom of the first shell, so that the contact time between the chemical solution and carbon dioxide is longer and the reaction is more complete, which can effectively improve the absorption efficiency of carbon dioxide, while reducing the waste of chemical solution and saving costs.

[0072] In some embodiments, an opening is provided at the top of the filler member 140; the first injector 130 includes a plurality of first injection pipes, each of which is provided with a spray hole; when the first injection pipe sprays the chemical solution from the spray hole to the filler member 140, the chemical solution flows from top to bottom in the filler member 140 through the opening and reacts with CO2 in the air.

[0073] refer to Figure 3 In order to prevent the liquid reacting with carbon dioxide in the filler 140 from flowing from one tubular object of the filler 140 to another tubular object, that is, the chemical solution flows horizontally in the filler 140, thereby reducing the absorption efficiency of carbon dioxide; an opening is provided at the top of the filler 140, and the chemical solution and the liquid reacting with carbon dioxide can flow out from the other end of the tubular object of the filler 140, that is, the chemical solution flows into the opening of the filler 140 and flows out from the opposite end of the opening; when the chemical solution flows from the tubular object of the filler 140 near the top of the first shell to the tubular object of the filler 140 near the bottom end of the first shell, and finally flows to the chemical solution at the bottom end of the first shell, it can fully react with carbon dioxide; and it avoids the tortuous flow path of the chemical solution, which may block the filler 140 and affect the absorption efficiency of carbon dioxide.

[0074] In some embodiments, the absorption tower 100 also includes a recovery plate 150; the recovery plate 150 is arranged at the top of the inner wall of the first shell; the recovery plate 150 includes a recovery plate body and a recovery plate extension, the recovery plate body is in contact with the inner wall of the first shell, and one end of the recovery plate extension is suspended between the top of the first shell and the filler 140.

[0075] refer to Figure 3 In order to prevent the chemical solution sprayed by the first injector 130 from generating side wall flow on the inner wall of the first shell, and to avoid excessive corrosion of the inner wall of the absorption tower 100 by the side wall flow, and to generate scaling on the inner wall of the absorption tower 100, a recovery plate 150 is provided. The recovery plate body and the inner wall of the first shell are fixedly connected and bonded by welding, bonding, etc., or are detachably connected and bonded by plugging, riveting, etc. One end of the recovery plate extension is suspended between the top of the first shell and a plurality of fillers 140. When the first injector 130 sprays the chemical solution, part of the chemical solution flows along the inner wall of the first shell to the recovery plate body and the recovery plate extension, and then flows from the recovery plate extension to the filler 140, thereby effectively reducing the corrosion damage of the chemical solution to the absorption tower 100 and improving the service life of the absorption tower.

[0076] In some preferred embodiments, the recovery plate 150 can be set near or close to the top of the inner wall of the first shell, and one end of the recovery plate extension is set to fit the filler 140. This ensures that when the first injector 130 sprays out the chemical solution and the chemical solution flows from the recovery plate extension to the top of the filler 140, no splashing of the chemical solution occurs, so that the chemical solution can flow from the filler 140 from top to bottom.

[0077] In some embodiments, the absorption tower 100 further includes an absorption tank 120 ; the absorption tank 120 is used to collect the product after the reaction of the chemical solution and CO 2 .

[0078] refer to Figure 3 The absorption tank 120 is arranged at the bottom of the first shell. After the carbon dioxide and the chemical solution in the absorption tower 100 are fully reacted, some products and the unreacted chemical solution can be collected in the absorption tank 120 for convenient centralized recovery, thereby preventing the reaction products from flowing into the environment and harming the environment.

[0079] In some embodiments, a first inlet 110 is provided at the top of the side wall of the first shell; the first inlet 110 is respectively connected to the first injection pipe and the absorption tank 120; the absorption tank 120 is also used to store a chemical solution that reacts with CO2, and the chemical solution flows from the first inlet 110 into the injection pipe for sputtering.

[0080] refer to Figure 1 and Figure 2In order to maximize the full utilization of the chemical solution, improve the absorption efficiency of carbon dioxide, and effectively reduce costs, a first inlet 110 is provided at the top of the side wall of the first shell, and one end of the first inlet 110 is connected to the first injection pipe, and the other end of the first inlet 110 is connected to the absorption tank 120, so that circulation can be achieved. The product after the reaction of the chemical solution and carbon dioxide contains a certain amount of incompletely reacted chemical solution, which is transported from the first inlet to the first injection pipe and ejected again to react with carbon dioxide, effectively improving the utilization rate of the chemical solution, which can greatly save costs and reduce energy consumption.

[0081] In some embodiments, a connecting pipe 300 is further included; the connecting pipe 300 is arranged between the absorption tower 100 and the recovery tower 200, and is respectively connected to the absorption tower 100 and the recovery tower 200; a fan 310 is also provided in the connecting pipe 300, and the fan 310 is used to transport at least part of the reaction product in the first shell to the second shell.

[0082] refer to Figure 4 The device also includes a connecting pipe 300, which can be connected to the absorption tower 100 and the recovery tower 200 respectively, so as to transport at least part of the reaction products in the first shell to the second shell. In order to provide a certain power during transportation and control the circulation rate of carbon dioxide, a fan 310 is also provided in the connecting pipe 300, so that part of the products in the first shell can reach the second shell without being retained in the connecting pipe 300, causing corrosion and damage to the connecting pipe 300.

[0083] In some embodiments of the present invention, a carbon dioxide capture device is further provided, comprising the carbon dioxide capture apparatus in any of the above embodiments.

[0084] The device can also be connected or communicated with a power device, a carbon dioxide delivery device, etc., so that carbon dioxide can be delivered to the device for efficient absorption.

[0085] The present application is described in detail below with reference to the accompanying drawings and examples, but the implementation and protection of the present invention are not limited thereto. The following embodiments are only some embodiments of the present application and are not limitations on the present application.

[0086] Example 1

[0087] The annual air capture capacity of carbon dioxide is 10 to 5,000 tons. The air is transported to the absorption tower, and the KOH solution (chemical solution) with a concentration of 4 to 7.5 mol / L is transported to the first inlet pipeline. Then it passes through the first ejector and diffuses into the absorption tower in the form of droplets. The water density of the splashing device is 2 to 15m 3 ·m -2 ·h -1The first ejector sprays 82% to 95% of the KOH solution through the packing and reacts with carbon dioxide in the air to generate K2CO3; 5% to 18% of the KOH solution will flow through the absorption tower walls on both sides and turn through the side wall flow recovery plate to flow into the packing longitudinally. This part of the KOH solution will also capture CO2 in the air in the packing to react and generate K2CO3 solution, and then flow into the absorption tank, and then be circulated to the first ejector, still at a water density of 2 to 15m 3 ·m -2 ·h -1 During operation, the KOH solution that has not reacted completely will still repeat the absorption process, and the recovery plate will continuously transfer the solution of the side wall flow to the packing to absorb CO2.

[0088] At this time, the gas composition after the reaction in the air capture absorption tower is complex, including some unreacted KOH solution and K2CO3 produced after the reaction. The KOH droplet content is 1 / 100000~5 / 1000 of the treatment volume, and the K2CO3 droplet content is 1 / 100000~5 / 1000 of the K2CO3 content generated by the reaction of KOH and CO2. Afterwards, the KOH droplets and K2CO3 droplets enter the droplet recovery tower, and H2O is used as the recovery liquid and is ejected from the second injector through the second inlet. The water density of the first injector is 1~9m 3 ·m -2 ·h -1 The recovery liquid will dissolve 99999 / 100000~995 / 1000 of the KOH droplets and K2CO3 droplets into the droplet recovery pool, and the remaining KOH droplets and K2CO3 droplets will be discharged to the outside of the absorption tower.

[0089] Example 2

[0090] The annual air capture capacity of carbon dioxide is 5-6000 tons. In the air transport absorption tower, the concentration of the chemical solution ethanolamine is 1-7 mol / L. Ethanolamine is transported to the first inlet pipeline, and then diffuses into the absorption tower in the form of droplets from top to bottom through the first ejector. The water density of the first ejector is 1-20m 3 ·m -2 ·h -1 The first ejector sprays 84-93% of the ethanolamine solution through the packing and contacts with carbon dioxide in the air to react and generate carbamate; 7-16% of the ethanolamine solution flows through the absorption tower walls on both sides and flows through the side wall flow recovery plate into the packing below. This part of the ethanolamine solution captures low-content CO2 in the air in the packing, reacts to generate carbamate and flows into the absorption tank below. It is then circulated and transported to the first ejector, still at a water density of 1-20m 3 ·m -2 ·h -1Capturing carbon dioxide in the air, in this cycle, the side wall flow of the first ejector always enters the packing element through the side wall flow recovery plate.

[0091] At this time, the gas composition after the reaction of the air capture carbon dioxide absorption tower is complex, including part of the unreacted ethanolamine solution and the carbamate produced after the reaction. The ethanolamine droplet content is 1 / 100,000 to 5 / 1000 of the treatment amount, and the carbamate droplet content is 1 / 100,000 to 5 / 1000 of the carbamate content generated by the reaction of ethanolamine and CO2. Afterwards, the air capture carbon dioxide absorption tower droplets enter the recovery tower, and H2O is used as the recovery liquid and is ejected from the second injector through the second inlet. The water density of the second injector is 0.5 to 7m 3 ·m -2 ·h -1 The recovery liquid will dissolve 99999 / 100000-995 / 1000 of the ethanolamine droplets and carbamate droplets into the droplet recovery pool, and the remaining ethanolamine droplets and carbamate droplets at the tail end of the recovery tower will be discharged to the outside of the absorption tower.

[0092] Parts of the present invention that are not described in detail are well known to those skilled in the art.

[0093] The basic principles of the present invention have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in the present invention are merely illustrative and non-limiting, and should not be construed as necessarily possessed by each embodiment of the present invention. Furthermore, the specific details disclosed above are provided for illustrative purposes and to facilitate understanding, and are not intended to be limiting. These details do not necessarily limit the present invention to being implemented using these specific details.

[0094] It should be noted that the terms "and / or" or " / " used herein are merely a description of an association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0095] In the detailed description and claims, a list of items connected by the terms "at least one of," "at least one of," "at least one of," or other similar terms may mean any combination of the listed items. For example, if items A and B are listed, the phrase "at least one of A and B" means only A; only B; or A and B. In another example, if items A, B, and C are listed, the phrase "at least one of A, B, and C" means only A; or only B; only C; A and B (excluding C); A and C (excluding B); B and C (excluding A); or all of A, B, and C. Item A may contain a single element or multiple elements. Item B may contain a single element or multiple elements. Item C may contain a single element or multiple elements.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A carbon dioxide capture device, characterized in that: include: An absorption tower (100) is provided with a first shell; A first injector (130) is provided in the first shell, and the first injector (130) is used to inject a chemical solution to react with CO2 flowing into the first shell; The recovery tower (200) is provided with a second shell; the second shell is connected to the first shell; A recovery pool (220) is provided at the bottom end of the second shell, and the recovery pool (220) is used to recover at least part of the reaction products in the first shell.

2. The carbon dioxide capture device according to claim 1, characterized in that The recovery tower (200) further includes a second ejector (230); The second injector (230) is arranged at the top end of the second shell, and the second injector (230) includes a plurality of second injection pipes, and the second injection pipes are provided with injection holes; The second ejector (230) sprays liquid through the plurality of ejection holes in the second ejection pipes, and the liquid reacts with the droplets generated in the first shell and is recovered into the recovery pool (220).

3. The carbon dioxide capture device according to claim 2, characterized in that The recovery tower (200) is further provided with a second inlet (210); The second inlet (210) is provided at the top end of the second shell side wall, the second inlet (210) is connected to the second injection pipe, and / or the second injection pipe is connected to the recovery pool (220); The second spray pipe splashes the liquid in the recovery tank (220) through the spray hole.

4. The carbon dioxide capture device according to claim 1, characterized in that The absorption tower (100) further includes a filler (140); The filler (140) is arranged in the first shell, and is used to react the air flowing into the first shell with the chemical solution, and to transfer the air after adsorbing CO2 to the second shell.

5. The carbon dioxide capture device according to claim 4, characterized in that The top end of the filler (140) is provided with an opening; The first injector (130) includes a plurality of first injection pipes, each of which is provided with a spray hole; When the first spray pipe sprays the chemical solution from the spray hole to the filler (140), the chemical solution flows from top to bottom in the filler (140) through the opening and reacts with CO2 in the air.

6. The carbon dioxide capture device according to claim 4, characterized in that The absorption tower (100) further includes a recovery plate (150); The recovery plate (150) is arranged on the top end of the inner side wall of the first shell; The recovery plate (150) comprises a recovery plate main portion and a recovery plate extension portion, the recovery plate main portion is in contact with the inner side wall of the first shell, and one end of the recovery plate extension portion is suspended between the top end of the first shell and the filler (140).

7. The carbon dioxide capture device according to claim 5, characterized in that The absorption tower (100) further includes an absorption tank (120); The absorption tank (120) is used to collect the product after the chemical solution and CO2 react.

8. The carbon dioxide capture device according to claim 7, characterized in that A first inlet (110) is provided at the top end of the first shell side wall; The first inlet (110) is connected to the first injection pipe and the absorption tank (120) respectively; The absorption tank (120) is also used to store a chemical solution that reacts with CO2, and the chemical solution flows from the first inlet (110) into the first spray pipe for sputtering.

9. The carbon dioxide capture device according to any one of claims 1 to 8, characterized in that: Also includes a communication pipe (300); The communication pipe (300) is provided between the absorption tower (100) and the recovery tower (200), and is respectively connected to the absorption tower (100) and the recovery tower (200); A fan (310) is also provided in the communication pipe (300), and the fan (310) is used to transport at least part of the reaction product in the first shell to the second shell.

10. A carbon dioxide capture device, characterized in that: A carbon dioxide capture device comprising the carbon dioxide capture device according to any one of claims 1 to 9.

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