Separation device for carbon dioxide and methane in flue gas

Abstract

The utility model discloses a separation device for carbon dioxide and methane in flue gas, and relates to the technical field of gas separation. Comprising a tank body, the interior of the tank body is divided into an upper cavity and a lower cavity through a partition plate, a separation assembly used for separating carbon dioxide and methane is arranged in the upper cavity, a porous partition plate used for removing large impurity molecules is arranged on the top face of the separation assembly, and the circumferential outer wall of the porous partition plate is fixedly connected with the inner wall of the tank body; a gas supply assembly for pressurizing the upper cavity is arranged in the lower cavity, the center of the top surface of the tank body is fixedly connected and communicated with a gas inlet pipe, the outer wall of the tank body is fixedly connected with a methane outlet pipe, the methane outlet pipe is communicated with the upper cavity, and the center of the bottom of the lower cavity is fixedly connected and communicated with a carbon dioxide outlet pipe. According to the device, carbon dioxide and methane can be efficiently and selectively separated, the adsorption cycle efficiency is effectively improved, and carbon capture is perfected.

Description

Technical Field

[0001] This utility model relates to the field of gas separation technology, and in particular to a device for separating carbon dioxide and methane in flue gas. Background Technology

[0002] Industrial flue gas often contains gases such as carbon dioxide and methane, which have potential environmental impacts. However, they can also be reused as resources. Carbon dioxide can be mainly used for carbon capture and storage and for methane production, while methane can be used as fuel and reformed to produce clean hydrogen energy. Separating these gases is of paramount importance. However, traditional separation technologies, such as adsorption, solvent methods, and membrane separation, have limited efficiency and high costs. Therefore, there is an urgent need for a separation device for carbon dioxide and methane in flue gas that can not only efficiently and selectively separate carbon dioxide and methane but also improve adsorption cycle efficiency and enhance carbon capture. Utility Model Content

[0003] The purpose of this invention is to provide a device for separating carbon dioxide and methane in flue gas, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides the following solution: This utility model provides a separation device for carbon dioxide and methane in flue gas, including a tank body. The tank body is divided into an upper chamber and a lower chamber by a partition plate. A separation component for separating carbon dioxide and methane is provided in the upper chamber. A porous baffle for removing large impurity molecules is provided on the top surface of the separation component. The circumferential outer wall of the porous baffle is fixedly connected to the inner wall of the tank body. A gas supply component for pressurizing the upper chamber is provided in the lower chamber. An air inlet pipe is fixedly connected and communicated with the center of the top surface of the tank body. A methane outlet pipe is fixedly connected to the outer wall of the tank body and communicates with the upper chamber. A carbon dioxide outlet pipe is fixedly connected and communicated with the center of the bottom of the lower chamber.

[0005] Preferably, the separation component includes a plurality of metal-organic framework materials and organic ligands, with one end of the metal-organic framework material penetrating the partition plate and extending into the lower cavity.

[0006] Preferably, the metal-organic framework material comprises cobalt, zinc, and magnesium metal nodes.

[0007] Preferably, the organic ligand comprises imidazole and phthalic acid.

[0008] Preferably, the air supply assembly includes an air inlet pipe disposed in the lower cavity, one end of the air inlet pipe extending out of the tank body and connected to a blower, and the other end of the air inlet pipe passing through the partition plate and extending into the upper cavity.

[0009] Preferably, the bottom of the methane outlet pipe is flush with the top surface of the partition plate.

[0010] Preferably, the bottom of the tank is inverted conical.

[0011] Preferably, the lower part of the tank is fixedly connected with several support legs.

[0012] Preferably, a terminal controller is fixedly connected to the outer wall of the tank, the terminal controller is electrically connected to a heater, the heater is disposed in the upper cavity, and the terminal controller is electrically connected to the blower.

[0013] The present invention discloses the following technical effects:

[0014] This invention enables efficient and selective separation of carbon dioxide and methane through a separation component installed in the upper chamber. The separation component adsorbs carbon dioxide, while methane is collected through a methane outlet pipe. Simultaneously, a gas supply component pressurizes the upper chamber, allowing the adsorbed carbon dioxide to enter the lower chamber and be collected through a carbon dioxide outlet pipe. This effectively improves the adsorption cycle efficiency and enhances carbon capture. Attached Figure Description

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the tank body of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the metal-organic framework material of this utility model;

[0019] Figure 4 This is a schematic diagram of the molecular structure model of the metal-organic framework material of this utility model;

[0020] The components include: 1. Metal-organic framework material; 2. Terminal controller; 3. Carbon dioxide outlet pipe; 4. Air inlet pipe; 5. Methane outlet pipe; 6. Organic ligand; 7. Porous partition; 8. Air inlet pipe; 9. Tank body; 10. Divider plate; 11. Support leg. Detailed Implementation

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] Reference Figures 1-4 This utility model discloses a separation device for carbon dioxide and methane in flue gas, including a tank 9. The tank 9 is divided into an upper chamber and a lower chamber by a partition plate 10. A separation component for separating carbon dioxide and methane is provided in the upper chamber. A porous partition plate 7 for removing large impurity molecules is provided on the top surface of the separation component. The circumferential outer wall of the porous partition plate 7 is fixedly connected to the inner wall of the tank 9. A gas supply component for pressurizing the upper chamber is provided in the lower chamber. An air inlet pipe 8 is fixedly connected and communicated to the center of the top surface of the tank 9. A methane outlet pipe 5 is fixedly connected to the outer wall of the tank 9 and communicates with the upper chamber. A carbon dioxide outlet pipe 3 is fixedly connected and communicated to the center of the bottom of the lower chamber.

[0025] This invention enables efficient and selective separation of carbon dioxide and methane through a separation component installed in the upper chamber. The separation component adsorbs carbon dioxide, while methane is collected through the methane outlet pipe 5. Simultaneously, the upper chamber is pressurized by the gas supply component, causing the carbon dioxide adsorbed by the separation component to enter the lower chamber and be collected through the carbon dioxide outlet pipe 3. This effectively improves the adsorption cycle efficiency and enhances carbon capture.

[0026] The scheme is further optimized. The separation component includes several metal-organic framework materials 1 and organic ligands 6. One end of the metal-organic framework material 1 extends into the lower chamber through the partition plate 10. Carbon dioxide and methane are separated efficiently and selectively by the organic ligands 6 and the metal-organic framework material 1. Methane passes through the metal-organic framework material 1 and is collected through the methane outlet pipe 5. At the same time, carbon dioxide gas is adsorbed by the metal-organic framework material 1, allowing the carbon dioxide gas to enter the lower chamber.

[0027] Further optimization of the scheme involves the metal-organic framework material 1 comprising cobalt, zinc, and magnesium metal nodes. This enables the metal-organic framework material 1 to preferentially adsorb carbon dioxide gas, allowing it to effectively and accurately adsorb carbon dioxide from the mixed gas, thereby achieving emission reduction.

[0028] Meanwhile, the metal-organic framework material 1 is composed of cobalt, zinc and magnesium metal nodes, which gives the metal-organic framework material 1 stable chemical properties. The metal-organic framework material 1 has good structural rigidity, stable material structure and does not require complex chemical reactions or harsh reaction conditions. It can also adsorb normally under high working pressure, making it suitable for long-term use in complex industrial environments and meeting the needs of industrial production.

[0029] The scheme was further optimized, and the organic ligand 6 consists of imidazole and phthalic acid.

[0030] The metal-organic framework material 1, composed of cobalt, zinc, and magnesium metal nodes, and the organic ligand 6, composed of imidazole and phthalic acid, are combined in different ways to create pores with varying sizes within a few nanometers. The pore size is adjustable to accommodate different molecular diameters of gases. Nanoscale particles with diameters larger than the pore size can be effectively filtered out. Different gases can be separated by different sizes, allowing for the separation of individual gases in a gas mixture to obtain the desired gas. Furthermore, the separation of small nanoscale gas molecules has almost no impact on the gas flow rate, meeting the high-efficiency requirements of industrial production. By controlling the separation, mixed flue gas can be selectively separated with accurate and efficient separation, which helps to solve the problems of energy waste and environmental damage caused by waste gas leakage pollution in coal-fired power plants.

[0031] The scheme is further optimized, and the gas supply component includes an air inlet pipe 4 located in the lower chamber. One end of the air inlet pipe 4 extends out of the tank body 9 and is connected to a blower, while the other end of the air inlet pipe 4 passes through the partition plate 10 and extends into the upper chamber. When the metal-organic framework material 1 is saturated with adsorbed carbon dioxide, the blower supplies gas to the air inlet pipe 4, allowing the carbon dioxide in the metal-organic framework material 1 to enter the lower chamber, and the carbon dioxide is collected through the carbon dioxide outlet pipe 3.

[0032] The design was further optimized so that the bottom of the methane outlet pipe 5 is flush with the top surface of the partition plate 10. This allows the methane in the upper chamber to effectively enter the methane outlet pipe 5.

[0033] The design was further optimized, with the bottom of tank 9 shaped like an inverted cone. This facilitates the collection of carbon dioxide gas.

[0034] In a further optimized design, several support legs 11 are fixedly connected to the lower part of the tank 9. These support legs 11 keep the carbon dioxide outlet pipe 3 away from the ground, facilitating the collection of carbon dioxide gas.

[0035] In a further optimized design, a terminal controller 2 is fixedly connected to the outer wall of tank 9. The terminal controller 2 is electrically connected to a heater, which is located inside the upper cavity. The terminal controller 2 is also electrically connected to a blower. The start and stop of the heater and blower are controlled by the terminal controller 2.

[0036] Working process: The mixture of carbon dioxide and methane enters the tank 9 through the inlet pipe 8. The mixture passes through the porous baffle 7 to filter out large impurity molecules and allows it to enter the upper chamber. The mixture is then separated by the organic ligand 6, and the metal-organic framework material 1 adsorbs the carbon dioxide molecules. At the same time, the methane molecules can pass smoothly through the metal-organic framework material 1. The methane gas is then collected through the methane outlet pipe 5.

[0037] When the metal-organic framework material 1 is saturated with adsorbed carbon dioxide, the terminal controller 2 controls the heater and blower to start. Under the temperature change and the pressure of the blower, the carbon dioxide adsorbed by the metal-organic framework material 1 enters the lower chamber through the metal-organic framework material 1 and is collected through the carbon dioxide outlet pipe 3.

[0038] Example 2

[0039] Applying this invention to a coal-fired power plant, the inlet pipe 8 is connected to the flue gas of the coal-fired power plant via a pretreatment instrument that separates the gases in the first step. The pretreatment instrument draws a mixture of carbon dioxide and methane from the waste flue gas generated by the coal-fired power plant into the tank 9 through the inlet pipe 8. At this point, the carbon dioxide and methane mixture passes through a porous baffle 7 to remove large impurity molecules, allowing the mixture to enter the upper chamber. There, the carbon dioxide and methane mixture is separated by organic ligands 6, and the metal-organic composite... Metal-organic framework material 1 adsorbs carbon dioxide gas molecules, while methane gas molecules can pass smoothly through metal-organic framework material 1. At this time, the methane gas is discharged through methane outlet pipe 5, which is connected to a methane collection tank. The methane is collected through the methane collection tank, which is connected to a methane reforming hydrogen production unit. At the same time, the methane collection tank is connected to the combustion chamber of a coal-fired power plant through a gas pump. The methane reforming hydrogen production unit is connected to a hydrogen energy collection device and a carbon dioxide and hydrogen reaction device. The carbon dioxide and hydrogen reaction device is connected to the carbon dioxide outlet pipe 3.

[0040] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A device for separating carbon dioxide and methane in flue gas, characterized in that: The container includes a tank (9), which is divided into an upper chamber and a lower chamber by a partition plate (10). The upper chamber is equipped with a separation component for separating carbon dioxide and methane. The top surface of the separation component is equipped with a porous partition plate (7) for removing large impurity molecules. The circumferential outer wall of the porous partition plate (7) is fixedly connected to the inner wall of the tank (9). The lower chamber is equipped with a gas supply component for pressurizing the upper chamber. An air inlet pipe (8) is fixedly connected and communicated to the center of the top surface of the tank (9). A methane outlet pipe (5) is fixedly connected to the outer wall of the tank (9) and communicates with the upper chamber. A carbon dioxide outlet pipe (3) is fixedly connected and communicated to the center of the bottom of the lower chamber.

2. The device for separating carbon dioxide and methane in flue gas according to claim 1, characterized in that: The separation component includes several metal-organic framework materials (1) and organic ligands (6), with one end of the metal-organic framework material (1) penetrating the partition plate (10) and extending into the lower cavity.

3. The device for separating carbon dioxide and methane in flue gas according to claim 1, characterized in that: The air supply assembly includes an air inlet pipe (4) disposed in the lower cavity. One end of the air inlet pipe (4) extends out of the tank body (9) and is connected to a blower. The other end of the air inlet pipe (4) passes through the partition plate (10) and extends into the upper cavity.

4. The device for separating carbon dioxide and methane in flue gas according to claim 1, characterized in that: The bottom of the methane outlet pipe (5) is flush with the top surface of the partition plate (10).

5. The device for separating carbon dioxide and methane in flue gas according to claim 1, characterized in that: The bottom of the tank (9) is inverted conical.

6. The device for separating carbon dioxide and methane in flue gas according to claim 1, characterized in that: The lower part of the tank (9) is fixedly connected with several support legs (11).

7. The device for separating carbon dioxide and methane in flue gas according to claim 3, characterized in that: A terminal controller (2) is fixedly connected to the outer wall of the tank (9). The terminal controller (2) is electrically connected to a heater. The heater is located in the upper cavity. The terminal controller (2) is electrically connected to the blower.

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