Carbon capture device for tail gas treatment

Abstract

The utility model relates to the technical field of carbon capture, in particular to a carbon capture device for tail gas treatment, which comprises a support, a tank body with an open top is mounted on the support, the top of the tank body is detachably connected with a cover plate I for sealing the tank body, and the bottom of the inner side of the tank body is connected with an annular partition plate. The annular partition plate divides the interior of the tank body into an inner cavity and an outer cavity, a cover plate II used for sealing the annular partition plate is rotationally connected to the cover plate I, a liquid injection pipe I used for injecting a solution into the outer cavity of the tank body is installed at the bottom of the tank body, and a liquid injection pipe II used for injecting the solution into the annular partition plate is installed at the bottom of the tank body. The interior of the tank body is divided into an inner cavity and an outer cavity through the annular partition plate, so that carbon dioxide in tail gas is filtered and absorbed layer by layer from inside to outside, the occupied space is small, overhaul and maintenance are convenient, reaction precipitates can be lifted to the upper side of an alkaline solvent by moving the filter screen I and the filter screen II upwards, and solid-liquid separation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon capture, in particular to a carbon capture device for tail gas treatment. Background Art

[0002] Carbon capture: It is to capture the carbon dioxide released into the atmosphere, compress it, and then compress it back into the depleted oil fields and natural gas fields or other safe underground places. The attraction is that it can reduce the harmful gases produced by burning fossil fuels - greenhouse gases. Carbon dioxide is a very valuable carbon resource and can be widely used in many fields. Chemical synthesis industry, mechanical protection welding, metal casting processing, agricultural fertilization, fruit and vegetable preservation, beer and beverage filling, oil extraction, fire fighting, medicine and health industries all need carbon dioxide. The flue gas discharged by some factories and power plants has a high content of carbon dioxide, and many flue gases are directly discharged into the atmosphere after dust removal, desulfurization and denitrification, which not only wastes the resource of carbon dioxide, but also aggravates the greenhouse effect and affects the climate.

[0003] After searching, a Chinese patent with patent publication number CN218393062U is found, which is a carbon capture device for production exhaust gas treatment, including a tank body and a support frame, the support frame is welded to the bottom of the tank body, a partition is welded to the tank body, the partition divides the inner part of the tank body into two upper and lower chambers, a solvent box 1 is fixedly installed at the bottom of the upper chamber, and a solvent box 2 is fixedly installed at the bottom of the lower chamber, the top left side of the solvent box 2 is connected to the solvent box 1 through a gas pipe, and the upper end of the gas pipe extends to the bottom of the solvent box 1.

[0004] Although the above patent can absorb (carbon capture) carbon dioxide in exhaust gas, the above patent needs to capture carbon particles by adsorbing with chemical solutions step by step from top to bottom. Such a device requires a certain height to mix the exhaust gas with the solution for a sufficient number of times, which will cause the problem of occupying a large space in the industrial plant and inconvenient equipment inspection and maintenance. In addition, the above patent cannot separate solids and liquids. When discharging the internal reaction precipitate, the solvent will be discharged together, resulting in the problem of waste due to insufficient utilization of the solvent. Utility Model Content

[0005] The purpose of the utility model is to provide a carbon capture device for tail gas treatment that can separate solid and liquid, occupies a small space, and is easy to repair and maintain in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a carbon capture device for tail gas treatment, including a bracket, a tank body with an open top is installed on the bracket, a cover plate I for sealing the tank body is detachably connected to the top of the tank body, an annular partition plate is connected to the inner bottom of the tank body, the annular partition plate divides the inner part of the tank body into two inner and outer chambers, a cover plate II for sealing the annular partition plate is rotatably connected to the cover plate I, an injection pipe I for injecting a solution into its outer chamber is installed at the bottom of the tank body, an annular cover body is connected to the outer wall of the tank body, exhaust pipes I for discharging the gas in its outer chamber into the annular cover body are connected to the tank body at intervals along the circumferential direction, an exhaust pipe is connected to the annular cover body, an injection pipe II for injecting a solution into the annular partition plate is installed at the bottom of the tank body, and the tank A gas injection pipe for injecting gas into the annular partition plate is installed at the bottom of the body, and exhaust pipes II are connected to the upper edge of the annular partition at intervals in the circumferential direction. Exhaust pipes II are used to discharge the gas in the chamber inside the tank body into the chamber outside the tank body. A filter screen I that can move up and down is sleeved on the outer wall of the annular partition plate, and the inner wall of the filter screen I is in close contact with the outer wall of the annular partition plate, and the outer wall of the filter screen I is in close contact with the inner wall of the tank body. A filter screen II that can move up and down is provided in the annular partition plate, and the side wall of the filter screen II is in close contact with the inner wall of the annular partition. A lifting frame is slidably connected to the bottom of the tank body, and the lifting frame is connected to the filter screens I and II. A driving mechanism for driving the lifting frame to move up and down is provided at the bottom of the tank body, and a suction mechanism for extracting the reaction precipitates on the filter screens I and II is provided on the cover plate I.

[0007] Preferably, the suction mechanism includes a shell embedded in the cover plate II, four shovel plates are connected at intervals at the bottom of the shell, the two middle shovel plates are located in the annular partition plate, and the two outer shovel plates are located in the outer chamber of the tank body. A cavity connected to the shell is opened on the shovel plate, and a feed port connected to the upper cavity is opened on the side of the shovel plate. An adsorption pump is installed on the top of the cover plate I, and the input end of the adsorption pump is connected to a suction pipe, which extends into the shell and is rotatably connected to the shell. The output end of the adsorption pump is connected to a discharge pipe, and a motor II is installed on the top of the cover plate I, and the output shaft of the motor II is transmission-connected to the cover plate II to drive the cover plate II to rotate.

[0008] Preferably, the driving mechanism includes a motor I installed at the bottom of the tank body, a winding wheel is connected to the output shaft of the motor I, a wire tube is connected to the bottom of the tank body, a pull rope is wound around the winding wheel, the pull rope passes through the wire tube and is connected to the lifting frame, and a spring is connected between the lifting frame and the tank body.

[0009] Preferably, observation windows are embedded on the side walls of the tank body and the annular partition plate, and the observation windows on the tank body and the annular partition plate are aligned with each other.

[0010] Preferably, a sealing ring is connected to the top of the tank body for sealing the gap between the tank body and the cover plate I.

[0011] Preferably, an activated carbon plate that can be withdrawn outward is provided in the exhaust duct.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The inner part of the tank is divided into two chambers, inner and outer, by an annular partition plate, so that the carbon dioxide in the exhaust gas is filtered and absorbed layer by layer from the inside to the outside, occupying a small space and convenient for inspection and maintenance.

[0014] 2. By moving up filter screens I and II, the reaction precipitate can be lifted to the upper side of the alkaline solvent to achieve solid-liquid separation. The reaction precipitate can be shoveled into the shell by a shovel plate, and the reaction precipitate can be pumped out by an adsorption pump, thereby achieving the effect of fully utilizing the solvent and separating the solid and liquid in time, solving the problem in the prior art that the solvent is discharged outward together with the internal reaction precipitate, resulting in insufficient utilization of the solvent and waste of external discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the suction mechanism of the utility model.

[0018] Figure 4 The utility model is a connection diagram of the annular partition plate, the shell and the shovel plate.

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the shell and the shovel plate of the utility model.

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the driving mechanism of the utility model.

[0021] Figure 7 It is a three-dimensional structural schematic diagram of the lifting frame, filter screen I and filter screen II of the utility model.

[0022] Figure 8 It is a schematic diagram of the connection between the observation window, the sealing ring and the activated carbon plate of the utility model.

[0023] The markings in the accompanying drawings are: 1- bracket, 2- tank body, 21- liquid injection pipe I, 22- annular cover body, 23- exhaust pipe I, 24- exhaust pipe, 3- cover plate I, 31- cover plate II, 4- annular partition plate, 41- air injection pipe, 42- liquid injection pipe II, 43- exhaust pipe II, 5- lifting frame, 6- filter net I, 61- filter net II, 71- motor I, 72- winding wheel, 73- wire tube, 74- pull rope, 75- spring, 81- shell, 82- shovel plate, 83- adsorption pump, 84- suction pipe, 85- discharge pipe, 86- motor II, 9- observation window, 10- sealing ring, 11- activated carbon plate. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0025] Example 1

[0026] A carbon capture device for tail gas treatment, see Figure 1-Figure 7, including a bracket 1, on which a tank body 2 with an open top is installed, the top of the tank body 2 is connected to a cover plate Ⅰ3 for sealing the tank body 2 by bolt connection, the inner bottom of the tank body 2 is connected to an annular partition plate 4, the annular partition plate 4 divides the inside of the tank body 2 into two inner and outer chambers, the cover plate Ⅱ31 for sealing the annular partition plate 4 is rotatably connected to the cover plate Ⅰ3, an injection pipe Ⅰ21 for injecting a solution into its outer chamber is installed at the bottom of the tank body 2, an annular cover body 22 is connected to the outer wall of the tank body 2, exhaust pipes Ⅰ23 for discharging the gas in its outer chamber into the annular cover body 22 are connected to the tank body 2 at intervals along the circumferential direction, an exhaust pipe 24 is connected to the left side of the annular cover body 22, and a liquid injection pipe Ⅰ21 for injecting a solution into the annular cover body 22 is installed at the bottom of the tank body 2. An injection pipe II 42 in the partition plate 4, an injection pipe 41 for injecting gas into the annular partition plate 4 is installed at the bottom of the tank body 2, and exhaust pipes II 43 are connected to the annular partition plate 4 at intervals along the circumference. The exhaust pipe II 43 is used to discharge the gas in the inner chamber of the tank body 2 to the outer chamber of the tank body 2. A filter net I 6 that can move up and down is slidably sleeved on the outer wall of the annular partition plate 4, and the inner wall of the filter net I 6 is tightly attached to the outer wall of the annular partition plate 4. The outer wall of the filter net I 6 is tightly attached to the inner wall of the tank body 2. A filter net II 61 that can move up and down is provided in the annular partition plate 4, and the side wall of the filter net II 61 is tightly attached to the inner wall of the annular partition plate 4. A lifting frame 5 is slidably connected to the bottom of the tank body 2. The lifting frame 5 consists of a lifting plate and a lifting rod. The top of the lifting plate is provided along its length. Four lifting rods are connected at intervals in the degree direction, the top ends of the lifting rods pass through the bottom of the tank body 2, the two middle lifting rods are connected to the filter screen II 61, and the two outer lifting rods are connected to the filter screen I 6. The bottom of the tank body 2 is provided with a driving mechanism for driving the lifting frame 5 to move up and down, and the driving mechanism includes a motor I 71 installed on the rear side of the bottom of the tank body 2, and two winding wheels 72 are symmetrically connected to the output shaft of the motor I 71. Two wire pipes 73 are symmetrically connected to the bottom of the tank body 2. Pull ropes 74 are wound around the two winding wheels 72. The two pull ropes 74 pass through the two wire pipes 73 and are connected to the lifting plate on the lifting frame 5. Two springs 75 are symmetrically connected between the top of the lifting plate on the lifting frame 5 and the bottom of the tank body 2. The cover plate I 3 is provided with a spring for A suction mechanism for extracting the reaction precipitate on the filter screen I6 and the filter screen II61 outwards comprises a shell 81 embeddedly mounted on the cover plate II31, four shovel plates 82 are connected to the bottom of the shell 81 at intervals, the two middle shovel plates 82 are located in the annular partition plate 4, and the two outer shovel plates 82 are located in the outer chamber of the tank body 2, a cavity connected to the shell 81 is opened on the shovel plate 82, and a feed port connected to the upper cavity is opened on the side of the shovel plate 82, an adsorption pump 83 is installed on the front side of the top of the cover plate I3, the input end of the adsorption pump 83 is connected to a suction pipe 84, the suction pipe 84 extends into the shell 81 and is rotatably connected to the shell 81, the output end of the adsorption pump 83 is connected to a discharge pipe 85, and a motor II 86 is installed on the rear side of the top of the cover plate I3.The output shaft of the motor II 86 is connected to the cover plate II 31 by transmission. In the present invention, the output shaft of the motor II 86 can be connected to the cover plate II 31 by transmission through a belt transmission assembly, a synchronous belt transmission assembly, a gear transmission assembly or a chain transmission assembly.

[0027] When in use, an alkaline solvent (such as a sodium hydroxide solvent) is injected into the outer chamber of the tank body 2 through the injection pipe I21, an alkaline solvent (such as a calcium hydroxide solvent) is injected into the inner chamber of the tank body 2 through the injection pipe II42, and the tail gas is injected into the inner chamber of the tank body 2 through the gas injection pipe 41. The tail gas reacts with the alkaline solvent in the inner chamber of the tank body 2, thereby completing the absorption (carbon capture) of a portion of the carbon dioxide in the tail gas; then, the tail gas after the reaction is discharged into the outer chamber of the tank body 2 through the exhaust pipe II43, and reacts with the alkaline solvent in the outer chamber of the tank body 2, thereby completing the absorption (carbon capture) of most of the carbon dioxide and sulfide in the tail gas. Subsequently, the tail gas after completing the absorption (carbon capture) of most of the carbon dioxide is discharged into the annular cover body 22 through the exhaust pipe I23, and is discharged into the atmosphere through the exhaust pipe 24. In this way, the device allows the carbon dioxide in the tail gas to be filtered and absorbed layer by layer from the inside to the outside, occupies a small space, and is easy to inspect and maintain. The reaction precipitate inside the tank body 2 falls on the filter screen I6 and the filter screen II61. The control motor I71 drives the winding wheel 72 to rotate the winding rope 74 to pull the lifting frame 5 upward, and the spring 75 is compressed accordingly. The lifting frame 5 moves upward to push the filter screen I6 and the filter screen II61 to move upward and contact the shovel plate 82, so as to lift the reaction precipitate to the upper side of the alkaline solvent to achieve solid-liquid separation. When the filter screen I6 moves upward, the reaction precipitate attached to the outer wall of the annular partition plate 4 and the inner wall of the tank body 2 is scraped off. When the filter screen II61 moves upward, the reaction precipitate attached to the inner wall of the annular partition plate 4 is scraped off. The control motor When Ⅱ86 is working, the cover plate Ⅱ31 can be driven to drive the housing 81 to rotate, so that the shovel plate 82 rotates to shovel the reaction precipitate on the filter screen Ⅰ6 and the filter screen Ⅱ61 into the cavity of the shovel plate 82 through the feed port on the shovel plate 82, and the adsorption pump 83 can be controlled to work to extract the reaction precipitate outward through the housing 81 and the suction pipe 84, and the reaction precipitate is discharged outward through the discharge pipe 85. In this way, the device can fully utilize the solvent and separate the solid and liquid in time, solving the problem of the prior art that the solvent is discharged outward when the internal reaction precipitate is discharged together, resulting in the waste of the solvent due to insufficient utilization. After the reaction precipitate is discharged outward, the motor Ⅰ71 is controlled to drive the winding wheel 72 to rotate in the opposite direction to release the pull rope 74, and under the reset action of the spring 75, the lifting frame 5 drives the filter screen Ⅰ6 and the filter screen Ⅱ61 to move down and reset.

[0028] See also Figure 8, observation windows 9 are embedded on the front sides of the tank body 2 and the annular partition plate 4, and the observation windows 9 on the tank body 2 and the annular partition plate 4 are aligned with each other. The observation windows 9 can be used to conveniently observe and control the exhaust gas treatment conditions inside the tank body 2 and the annular partition plate 4.

[0029] See also Figure 8 A sealing ring 10 is connected to the top of the tank body 2, and the sealing ring 10 can seal the gap between the tank body 2 and the cover plate Ⅰ3 to prevent gas from leaking from the gap between the tank body 2 and the cover plate Ⅰ3.

[0030] See also Figure 8 An activated carbon plate 11 that can be withdrawn to the left is slidably connected in the exhaust pipe 24. The activated carbon plate 11 can absorb water vapor in the treated exhaust gas to avoid excessive water content in the exhaust gas discharged into the atmosphere.

[0031] The above-mentioned embodiments only express the preferred implementation of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications, improvements and substitutions can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A carbon capture device for tail gas treatment, characterized in that: The invention comprises a support (1), a tank body (2) with an open top is mounted on the support (1), a cover plate I (3) for sealing the tank body (2) is detachably connected to the top of the tank body (2), an annular partition plate (4) is connected to the bottom of the inner side of the tank body (2), the annular partition plate (4) divides the inside of the tank body (2) into two inner and outer chambers, a cover plate II (31) for sealing the annular partition plate (4) is rotatably connected to the cover plate I (3), and a cover plate for sealing the annular partition plate (4) is mounted at the bottom of the tank body (2) The tank body (2) is provided with an injection pipe I (21) for injecting solution into its outer chamber, an annular cover body (22) is connected to the outer wall of the tank body (2), exhaust pipes I (23) for discharging gas in its outer chamber into the annular cover body (22) are connected to the tank body (2) at intervals along the circumferential direction, the annular cover body (22) is connected to an exhaust pipe (24), an injection pipe II (42) for injecting solution into the annular partition plate (4) is installed at the bottom of the tank body (2), and an exhaust pipe (24) for injecting gas into the annular partition plate (4) is installed at the bottom of the tank body (2). The gas injection pipe (41) in the partition plate (4) is connected to an exhaust pipe II (43) at intervals along the circumferential direction of the annular partition. The exhaust pipe II (43) is used to discharge the gas in the inner chamber of the tank body (2) into the outer chamber of the tank body (2). The outer wall of the annular partition plate (4) is provided with a filter net I (6) that can move up and down. The inner wall of the filter net I (6) is in close contact with the outer wall of the annular partition plate (4). The outer wall of the filter net I (6) is in close contact with the inner wall of the tank body (2). A filter screen II (61) is provided which can move up and down, the side wall of the filter screen II (61) is in close contact with the inner wall of the annular partition, a lifting frame (5) is slidably connected to the bottom of the tank body (2), the lifting frame (5) is connected to the filter screen I (6) and the filter screen II (61), a driving mechanism for driving the lifting frame (5) to move up and down is provided at the bottom of the tank body (2), and a suction mechanism for extracting reaction precipitates on the filter screen I (6) and the filter screen II (61) is provided on the cover plate I (3).

2. A carbon capture device for tail gas treatment according to claim 1, characterized in that: The suction mechanism comprises a shell (81) embedded on the cover plate II (31), four shovel plates (82) are connected to the bottom of the shell (81) at intervals, the two middle shovel plates (82) are located in the annular partition plate (4), and the two outer shovel plates (82) are located in the outer chamber of the tank body (2), a cavity connected to the shell (81) is opened on the shovel plate (82), and a feed port connected to the upper cavity is opened on the side of the shovel plate (82), an adsorption pump (83) is installed on the top of the cover plate I (3), the input end of the adsorption pump (83) is connected to a suction pipe (84), the suction pipe (84) extends into the shell (81) and is rotatably connected to the shell (81), the output end of the adsorption pump (83) is connected to a discharge pipe (85), and a motor II (86) is installed on the top of the cover plate I (3), and the output shaft of the motor II (86) is transmission-connected to the cover plate II (31) to drive the cover plate II (31) to rotate.

3. The carbon capture device for tail gas treatment according to claim 1, characterized in that: The driving mechanism comprises a motor I (71) installed at the bottom of the tank body (2), the output shaft of the motor I (71) is connected to a winding wheel (72), the bottom of the tank body (2) is connected to a wire tube (73), a pull rope (74) is wound around the winding wheel (72), the pull rope (74) passes through the wire tube (73) and is connected to a lifting frame (5), and a spring (75) is connected between the lifting frame (5) and the tank body (2).

4. The carbon capture device for tail gas treatment according to claim 1, characterized in that: Observation windows (9) are embedded and installed on the side walls of the tank body (2) and the annular partition plate (4), and the observation windows (9) on the tank body (2) and the annular partition plate (4) are aligned with each other.

5. The carbon capture device for tail gas treatment according to claim 1, characterized in that: The top of the tank body (2) is connected with a sealing ring (10) for sealing the gap between the tank body (2) and the cover plate I (3).

6. The carbon capture device for tail gas treatment according to claim 1, characterized in that: An activated carbon plate (11) that can be drawn out is arranged in the exhaust pipe (24).

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