Carbon dioxide tail gas absorbing and recycling device

Abstract

The utility model discloses a carbon dioxide tail gas absorbing and recycling device, and belongs to the technical field of gas treatment equipment. The carbon dioxide tail gas absorbing and recycling device comprises a dissolving tank and an evaporating tank, a supporting frame is fixedly connected between the dissolving tank and the evaporating tank, a conveying pump and a reflux pump are fixedly installed on the top of the supporting frame, a partition plate is fixedly connected between the inner walls of the evaporating tank, and a control box is fixedly connected to the top of the evaporating tank; according to the carbon dioxide tail gas absorption and cyclic utilization device, carbon dioxide in carbon dioxide tail gas can be absorbed by a solvent, and high-purity carbon dioxide is extracted from the carbon dioxide tail gas for subsequent cyclic utilization; meanwhile, the recycling of the solvent for extracting the carbon dioxide and the condensate water is realized, the resource loss in the carbon dioxide extraction process is greatly reduced, and the economical efficiency, the environmental protection property and the sustainability are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of gas treatment equipment technology, and more specifically, to a carbon dioxide tail gas absorption and recycling device. Background Technology

[0002] Carbon dioxide exhaust is a mixture of gases emitted from the combustion of fossil fuels or industrial processes. Its main component is carbon dioxide, along with small amounts of water vapor, sulfur oxides, nitrogen oxides, and unburned hydrocarbons. As a major contributor to the greenhouse effect, excessive emissions exacerbate global warming, triggering extreme weather events and ecological crises. It is particularly prominent in the petrochemical, thermal power generation, and transportation sectors.

[0003] Commonly used carbon dioxide capture methods in industry include chemical absorption, physical adsorption, and membrane separation. Among them, chemical absorption is widely used due to its high absorption efficiency and mature technology. However, traditional chemical absorption processes still have the following problems: high-temperature water vapor can easily carry away some solvents and cause them to evaporate, leading to increased costs for solvent degradation and replenishment; and direct discharge of condensate not only wastes water resources but may also cause environmental pollution. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a carbon dioxide tail gas absorption and recycling device, which realizes the extraction of high-purity carbon dioxide from carbon dioxide tail gas for subsequent recycling, and at the same time realizes the recycling of solvent and condensate used in carbon dioxide extraction, which greatly reduces resource loss in the carbon dioxide extraction process and significantly improves economy, environmental protection and sustainability.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A carbon dioxide tail gas absorption and recycling device includes: a dissolving tank and an evaporating tank. A support frame is fixedly connected between the dissolving tank and the evaporating tank. A delivery pump and a return pump are fixedly installed on the top of the support frame. A partition is fixedly connected between the inner walls of the evaporating tank. A control box is fixedly connected to the top of the evaporating tank. A transmission threaded rod is rotatably connected between the control box and the evaporating tank. A transmission rod slides through the tank cover of the evaporating tank. A transmission plate is fixedly connected to the upper end of the transmission rod. The transmission plate is threadedly connected to the transmission threaded rod. A frustum-shaped sealing plate is fixedly connected to the lower end of the transmission rod. A condenser is fixedly installed on the top of the evaporating tank. The input pipe of the condenser extends to the lower side of the partition, and the drain pipe of the condenser extends to the lower side of the tank cover of the evaporating tank.

[0009] As a preferred embodiment of the present invention, a feed pipe is fixedly inserted through the outer surface of the dissolving tank, and one end of the feed pipe extends to the vicinity of the bottom inner wall of the dissolving tank.

[0010] In a preferred embodiment of this utility model, an exhaust pipe is fixedly connected to the top of the dissolving tank, and the exhaust pipe is connected to the interior of the dissolving tank.

[0011] In a preferred embodiment of this utility model, a drive motor is fixedly installed on the top of the control box, and the output end of the drive motor is fixedly connected to the transmission threaded rod.

[0012] In a preferred embodiment of this utility model, a limit rod is fixedly connected between the control box and the evaporator, and the transmission plate is slidably sleeved on the limit rod.

[0013] As a preferred embodiment of this utility model, the limiting rod is made of stainless steel.

[0014] 3. Beneficial effects

[0015] Compared with existing technologies, this utility model provides a carbon dioxide exhaust gas absorption and recycling device, which has the following beneficial effects:

[0016] This carbon dioxide tail gas absorption and recycling device works as follows: When carbon dioxide tail gas is introduced into the dissolving tank, the carbon dioxide in the tail gas is absorbed by the solvent. Then, a pump transports the solvent containing the absorbed carbon dioxide from the dissolving tank to the evaporating tank. By heating the evaporating tank, the solvent and carbon dioxide are separated. During the heating process, a frustum-shaped sealing plate completely seals the partition, allowing carbon dioxide gas to enter the condenser along with water vapor. The condenser liquefies the water vapor and transports it through a drain pipe to the space between the evaporating tank and the partition, discharging the carbon dioxide containing water vapor into a drying device to obtain high-purity carbon dioxide gas. After the carbon dioxide in the evaporating tank has evaporated, the drive motor is started, driving the transmission screw rod to rotate and raising the transmission plate. The transmission rod raises the frustum-shaped sealing plate, causing all the liquid stored on the upper side of the partition to flow into the lower side of the partition. At this time, a reflux pump transports the solvent from the evaporating tank to the dissolving tank. This achieves the extraction of high-purity carbon dioxide from the carbon dioxide tail gas for subsequent recycling, while also recycling the solvent and condensate used in carbon dioxide extraction. This greatly reduces resource consumption during the carbon dioxide extraction process and significantly improves economic efficiency, environmental friendliness, and sustainability. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2This is a cross-sectional view of the dissolving tank and evaporating tank of this utility model;

[0019] Figure 3 This is a cross-sectional view of the control box of this utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Dissolving tank; 2. Evaporating tank; 3. Feed pipe; 4. Support frame; 5. Transfer pump; 6. Reflux pump; 7. Condenser; 8. Control box; 9. Baffle plate; 10. Transmission rod; 11. Frustum-shaped sealing plate; 12. Drive motor; 13. Transmission threaded rod; 14. Transmission plate; 15. Limiting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Example:

[0024] Please see Figures 1-3 A carbon dioxide tail gas absorption and recycling device includes: a dissolving tank 1 and an evaporating tank 2. A support frame 4 is fixedly connected between the dissolving tank 1 and the evaporating tank 2. A delivery pump 5 and a return pump 6 are fixedly installed on the top of the support frame 4. A partition 9 is fixedly connected between the inner walls of the evaporating tank 2. A control box 8 is fixedly connected to the top of the evaporating tank 2. A transmission threaded rod 13 is rotatably connected between the control box 8 and the evaporating tank 2. A transmission rod 10 slides through the tank cover of the evaporating tank 2. A transmission plate 14 is fixedly connected to the upper end of the transmission rod 10. The transmission plate 14 is threadedly connected to the transmission threaded rod 13. A frustum-shaped sealing plate 11 is fixedly connected to the lower end of the transmission rod 10. A condenser 7 is fixedly installed on the top of the evaporating tank 2. The input pipe of the condenser 7 extends to the lower side of the partition 9. The drain pipe of the condenser 7 extends to the lower side of the tank cover of the evaporating tank 2.

[0025] In a specific embodiment of this utility model, the input and output pipes of the transfer pump 5 extend to the vicinity of the bottom inner wall of the dissolving tank 1 and the bottom inner wall of the evaporating tank 2, respectively. The input pipe of the reflux pump 6 extends to the vicinity of the bottom inner wall of the evaporating tank 2, and the output pipe of the reflux pump 6 is located at a higher position inside the dissolving tank 1. The dissolving tank 1 contains an absorbent solvent that can reversibly react with carbon dioxide. When carbon dioxide tail gas is introduced into the dissolving tank 1, the carbon dioxide in the tail gas is absorbed by the solvent. Then, the transfer pump 5 transports the solvent containing the absorbed carbon dioxide from the dissolving tank 1 to the evaporating tank 2. By heating the evaporating tank 2, the solvent and carbon dioxide are separated. During the heating process, the frustum-shaped sealing plate 11 completely seals the partition 9, and the carbon dioxide gas can only enter the interior of the condenser 7 along with the water vapor. Condenser 7 liquefies water vapor and transports it through a drain pipe to the space between evaporator 2 and baffle 9, discharging carbon dioxide containing water vapor into the drying equipment to obtain high-purity carbon dioxide gas. After the carbon dioxide inside evaporator 2 has evaporated, the transmission threaded rod 13 is rotated to drive the transmission plate 14 to rise. The transmission rod 10 drives the frustum-shaped sealing plate 11 to rise, causing all the liquid stored on the upper side of baffle 9 to flow into the lower side of baffle 9. At this time, the solvent inside evaporator 2 is transported to the interior of dissolving tank 1 by reflux pump 6. This realizes the extraction of high-purity carbon dioxide from carbon dioxide tail gas for subsequent recycling, and also realizes the recycling of solvent and condensate used in carbon dioxide extraction. This greatly reduces resource consumption in the carbon dioxide extraction process and significantly improves economic efficiency, environmental protection and sustainability.

[0026] Specifically, a feed pipe 3 is fixedly inserted through the outer surface of the dissolving tank 1, and one end of the feed pipe 3 extends to the vicinity of the bottom inner wall of the dissolving tank 1.

[0027] In this embodiment, the feed pipe 3 is used to introduce carbon dioxide exhaust gas into the interior of the dissolving tank 1.

[0028] Specifically, an exhaust pipe is fixedly connected to the top of the dissolving tank 1, and the exhaust pipe is connected to the interior of the dissolving tank 1.

[0029] In this embodiment, the exhaust pipe is used to discharge other gases in the carbon dioxide exhaust gas to the outside of the dissolving tank 1.

[0030] Specifically, a drive motor 12 is fixedly installed on the top of the control box 8, and the output end of the drive motor 12 is fixedly connected to the transmission threaded rod 13.

[0031] In this embodiment, by controlling the start of the drive motor 12, the transmission threaded rod 13 can be driven to rotate.

[0032] Specifically, a limit rod 15 is fixedly connected between the control box 8 and the evaporator 2, and the transmission plate 14 is slidably sleeved on the limit rod 15.

[0033] In this embodiment, the limiting rod 15 keeps the transmission plate 14 stable during up-and-down movement.

[0034] Specifically, the limit rod 15 is made of stainless steel.

[0035] In this embodiment, the limiting rod 15 is not easily corroded and has good durability.

[0036] Working principle: When carbon dioxide exhaust gas is introduced into the dissolving tank 1, the carbon dioxide in the exhaust gas is absorbed by the solvent. Then, the transfer pump 5 transports the solvent containing the absorbed carbon dioxide from the dissolving tank 1 to the evaporating tank 2. By heating the evaporating tank 2, the solvent and carbon dioxide are separated. During the heating process, the frustum-shaped sealing plate 11 completely seals the partition 9, allowing the carbon dioxide gas to enter the condenser 7 along with the water vapor. The condenser 7 liquefies the water vapor and transports it through the drain pipe to the space between the evaporating tank 2 and the partition 9, discharging the carbon dioxide containing water vapor into the drying equipment to obtain high-purity carbon dioxide gas. After the carbon dioxide inside the evaporating tank 2 has evaporated completely, the drive motor 12 is started by controlling the drive screw 13 to rotate, which in turn drives the transmission plate 14. As the transmission rod 10 rises, it drives the frustum-shaped sealing plate 11 to rise, causing all the liquid stored on the upper side of the partition 9 to flow into the lower side of the partition 9. At this time, the solvent inside the evaporator 2 is transported to the interior of the dissolving tank 1 by the reflux pump 6, realizing the extraction of high-purity carbon dioxide from the carbon dioxide tail gas for subsequent recycling. At the same time, it realizes the recycling of the solvent and condensate used to extract carbon dioxide, greatly reducing resource consumption in the carbon dioxide extraction process and significantly improving economy, environmental protection and sustainability. The control method of this utility model is controlled by manually starting and stopping the switch. The wiring diagram of the power component and the power supply are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A carbon dioxide tail gas absorption and recycling device, characterized in that, include: A dissolving tank (1) and an evaporating tank (2) are provided. A support frame (4) is fixedly connected between the dissolving tank (1) and the evaporating tank (2). A transfer pump (5) and a reflux pump (6) are fixedly installed on the top of the support frame (4). A partition plate (9) is fixedly connected between the inner walls of the evaporating tank (2). A control box (8) is fixedly connected to the top of the evaporating tank (2). A transmission threaded rod (13) is rotatably connected between the control box (8) and the evaporating tank (2). The lid of the evaporating tank (2) is also provided. A transmission rod (10) is slidably connected through the transmission rod (10). A transmission plate (14) is fixedly connected to the upper end of the transmission rod (10). The transmission plate (14) is threadedly connected to the transmission thread rod (13). A frustum-shaped sealing plate (11) is fixedly connected to the lower end of the transmission rod (10). A condenser (7) is fixedly installed on the top of the evaporator (2). The input pipe of the condenser (7) extends to the lower side of the partition plate (9). The drain pipe of the condenser (7) extends to the lower side of the tank cover of the evaporator (2).

2. The carbon dioxide tail gas absorption and recycling device according to claim 1, characterized in that: A feed pipe (3) is fixedly inserted through the outer surface of the dissolving tank (1), and one end of the feed pipe (3) extends to the vicinity of the bottom inner wall of the dissolving tank (1).

3. The carbon dioxide tail gas absorption and recycling device according to claim 1, characterized in that: The top of the dissolving tank (1) is fixedly connected to an exhaust pipe, which is connected to the interior of the dissolving tank (1).

4. The carbon dioxide tail gas absorption and recycling device according to claim 1, characterized in that: A drive motor (12) is fixedly installed on the top of the control box (8), and the output end of the drive motor (12) is fixedly connected to the transmission threaded rod (13).

5. The carbon dioxide tail gas absorption and recycling device according to claim 1, characterized in that: A limit rod (15) is fixedly connected between the control box (8) and the evaporator (2), and the transmission plate (14) is slidably sleeved on the limit rod (15).

6. The carbon dioxide tail gas absorption and recycling device according to claim 5, characterized in that: The limiting rod (15) is made of stainless steel.

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