Detachable carbon dioxide resourceful device with gas-liquid separation

Abstract

The present specification introduces a detachable gas-liquid separation type carbon dioxide resource utilization device. The device belongs to the field of carbon dioxide resource utilization, and realizes effective separation of carbon dioxide gas product, electrolyte liquid product and oxygen through three-chamber electrolysis technology, improves reaction efficiency and product purity. The device is composed of anode frame, cathode frame, inlaid electrode assembly and upper and lower gas-liquid distribution device, adopts continuous flow reactor design, realizes efficient separation and contact reduction of gas and liquid. Its highlights are three-chamber adjustability, complete reaction, controllable rate and electrode assembly convenient to maintain and replace, which provides a new efficient solution for carbon dioxide resource utilization.

Description

Technical Field

[0001] This invention belongs to the field of carbon dioxide resource utilization and also has the function of gas-liquid separation of the generated products. Specifically, it relates to an electrocatalytic carbon dioxide resource preparation process. Technical Background

[0002] This project, based on the existing electrolytically coupled carbon dioxide unit, employs a three-chamber electrolysis process to separate the gaseous products of carbon dioxide, the products of carbon dioxide electrolysis of water, and the generated oxygen. It also boasts advantages such as three-chamber adjustability, thorough reaction, and controllable reaction rate.

[0003] In traditional carbon dioxide resource utilization, the electrolysis products of carbon dioxide are often a mixture of gas and liquid, requiring further separation. Furthermore, resources such as oxygen generated at the anode are difficult to utilize, and the potential reaction between the electrolyte and the products must be considered. This results in low carbon dioxide utilization. Therefore, this device design, based on the traditional cathode electrocatalytic reduction of carbon dioxide, uses electrodes and a gas diffusion layer as the outer shell, dividing the reactor into three chambers: gas, liquid, and gas. This ensures that the gas and liquid in the three chambers do not directly contact each other, achieving separation of the gas (liquid) and products within each chamber.

[0004] The electrocatalytic device designed in this project is a continuous flow reactor. Wet CO2 is fed into the gas pipeline for reduction. The gas chamber reactor is used as the cathode chamber. Gas diffusion electrodes are used to separate the gas and liquid to complete the contact reduction. Gas-liquid convection is used to improve the reaction efficiency. Utility Model Content

[0005] This utility model relates to a detachable gas-liquid separation type carbon dioxide resource recovery device, characterized by the following structure and connection relationship:

[0006] The anode frame is used to support and fix the anode electrode assembly; the embedded anode electrode assembly is embedded in the anode frame and includes an anode plate and a gas diffusion layer, which are connected in a sealed and detachable manner; the cathode frame is used to support and fix the cathode electrode assembly; the embedded cathode electrode assembly is embedded in the cathode frame and includes a cathode plate and a gas diffusion layer, which are connected in a sealed and detachable manner.

[0007] The upper gas-liquid distribution device is located at the top of the device and includes a carbon dioxide outlet with valves, an electrolyte inlet, and an air outlet, which are used for uniform gas-liquid distribution and connection to the upper reactor.

[0008] The reaction chamber, located between the anode frame and the cathode frame, includes an electrolyte chamber, a carbon dioxide reduction chamber, and an air chamber. These three chambers are separated by a gas diffusion layer to prevent direct contact between the gas and liquid.

[0009] The lower gas-liquid distribution device is located at the bottom of the device and includes a carbon dioxide inlet with valves, an electrolyte outlet, and an air inlet, which are used for uniform gas-liquid distribution and connection to the next stage reactor.

[0010] The anode column is connected to the positive terminal of the power supply, and the cathode column is connected to the negative terminal of the power supply. During the electrolysis process, carbon dioxide is utilized as a resource, the product is separated into gas and liquid, and high-oxygen air is prepared.

[0011] The outer edge of the upper gas-liquid distribution device is provided with a carbon dioxide outlet, an electrolyte inlet, and an air outlet from bottom to top. The gas and liquid distribution in the reaction chamber is uniform through the main air inlet and the sub-air and liquid inlets. The upper edge is provided with an anode column and a cathode column, and the lower edge has a protruding part for connecting with the reaction chamber. It can also be connected to the lower gas-liquid distribution device of the next stage reactor through connecting pipes to form a multi-stage continuous reaction.

[0012] The reaction chamber consists of, from the inside out, a carbon dioxide reduction chamber, a cathode frame, an electrolyte chamber, an anode frame, an air chamber, and an outer shell. The electrolyte chamber is located between the anode frame and the cathode frame, and its reaction efficiency is improved by gas convection.

[0013] The outer edge of the lower gas-liquid distribution device is provided with a carbon dioxide inlet, an electrolyte outlet and an air inlet from top to bottom. Its upper edge has a protruding part for connection with the reaction chamber and has a vent. It is connected to the upper gas-liquid distribution device of the next stage reactor through a connecting pipeline to form a multi-stage continuous reaction.

[0014] During electrolysis, the anode column is connected to the positive terminal of the power supply, and the cathode column is connected to the negative terminal of the power supply, thus realizing the resource utilization of carbon dioxide.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) This invention provides a novel detachable gas-liquid separation carbon dioxide resource recovery device. Under the action of a catalyst in the cathode gas chamber, carbon dioxide is reduced to C1C2 products, such as C2H4 and CH4, which are high-value-added gaseous products. Liquid products, such as alcohol, are directly retained in the electrolyte chamber, achieving gas-liquid separation. This reactor is simple to operate, flexible, and controllable. It can not only control the carbon dioxide resource recovery process but also separate the products, ensuring effective utilization of each product. Furthermore, it can increase the utilization rate of carbon dioxide through multi-stage reaction devices connected in series. It has good compatibility with the preparation of large amounts of carbon dioxide and oxygen generated in the petroleum industry through coal-fired power generation.

[0017] (2) Compared with traditional electrocatalytic oxidation technology, this invention solves the problem of working with only a single electrode by changing the structure of the device, improves the energy utilization efficiency, produces oxygen at the anode as an oxidant in the process, and performs carbon dioxide reduction at the cathode as a resource utilization process. Moreover, the liquid products in the electrolyte chamber are easier to separate, and can produce a variety of resources to create objective economic benefits. Overall, it achieves comprehensive benefits in many aspects such as energy saving, emission reduction, greening, and environmental protection.

[0018] (3) The reaction device of the present invention controls the flow rate of gas and liquid in each chamber by valves and connects multiple reactors to achieve a more thorough reduction of carbon dioxide and produce oxygen concentration in oxygen-containing air. For example, increasing the number of reaction stages can achieve a more thorough reduction of carbon dioxide and slowing down the air flow rate to increase the oxygen content in the air.

[0019] (4) This invention improves the efficiency of carbon dioxide reduction by increasing the gas-liquid contact area. By changing the traditional reaction base from a square plate to a cylindrical shape and using a shell-type structure to build the reaction chamber, the adhesion area of ​​the anode and cathode is greatly increased, making the reaction more complete and thorough. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the appearance of the present utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is a perspective view of the gas-liquid distribution device.

[0023] Figure 4 This is a bottom view of the gas-liquid distribution device.

[0024] Figure 5 This is a breakdown diagram of the reaction chamber;

[0025] Figure 6 This is a top view of the reaction chamber;

[0026] Figure 7 This is a perspective view of the lower gas-liquid distribution device;

[0027] Figure 8 This is a bottom view of the gas-liquid distribution device;

[0028] In the diagram: 1 Upper gas-liquid distributor, 2 Reaction chamber, 3 Lower gas-liquid distributor, 4 Upper cap, 5 Lower cap, 6 Cathode column, 7 Anode column, 8 Carbon dioxide outlet, 9 Electrolyte inlet, 10 Air outlet, 11 Carbon dioxide vent, 12 Electrolyte flow port, 13 Air vent, 14 Cathode frame connection port, 15 Anode frame connection port, 16 Reactor shell connection port, 17 Upper gas-liquid distributor shell, 18 Air branch pipe, 19 Electrolyte branch pipe, 20 Carbon dioxide branch pipe, 21 Anode column insertion port, 22 Cathode column insertion port, 23 Reaction chamber shell, 24 Air chamber, 25 Anode frame, 26 Electrolyte chamber, 27 Cathode frame, 28 Carbon dioxide reduction chamber, 29 Embedded cathode electrode assembly, 30 Embedded anode electrode assembly, 31 Carbon dioxide inlet, 32 Electrolyte outlet, 33 Air inlet. Detailed Implementation

[0029] like Figure 1 As shown in Figure 2, this detachable gas-liquid separation carbon dioxide resource recovery device consists of 1 upper gas-liquid distribution device, 2 reaction chamber, 3 lower gas-liquid distribution device, etc.

[0030] like Figure 4 The cathode region shown consists of a cathode frame (27), a carbon dioxide reduction chamber (28), and an embedded cathode electrode assembly (29). The anode region consists of an air chamber (24), an electrolyte chamber (26), an anode frame (25), and an embedded anode electrode assembly (30). The two regions do not come into direct contact. Carbon dioxide reaches the cathode through the gas diffusion layer, and the gaseous products generated after the reaction return to the reduction chamber through the gas diffusion layer. Oxygen generated at the anode reaches the air chamber through the gas diffusion layer and is carried out. This ensures effective transfer of electrolyte and achieves initial separation of products.

[0031] like Figure 2 As shown, carbon dioxide and air enter carbon dioxide branch pipes 20 and 18 through carbon dioxide inlet 31 and air inlet 33, respectively, and then uniformly enter carbon dioxide reduction chamber 28 and air chamber 24 through carbon dioxide vent hole 11 and air vent hole 13. Electrolyte enters electrolyte chamber 26 through electrolyte inlet 9 and electrolyte branch pipe 19, and then uniformly enters electrolyte chamber 26 through electrolyte flow hole 12, forming convection with carbon dioxide and air to improve reaction efficiency. The gaseous product of carbon dioxide reduction flows out through carbon dioxide outlet 8, while the liquid product flows out through electrolyte outlet 32 ​​along with the electrolyte. Oxygen generated at the anode enters air chamber 24 through the gas diffusion layer and flows out through air outlet 10. Multi-stage reactions can be achieved by connecting the liquid outlet in series with the next stage inlet to achieve more complete carbon dioxide reduction.

Claims

1. A detachable gas-liquid separation carbon dioxide resource recovery device, characterized in that... include: a. An anode frame (25) for supporting and securing the anode electrode assembly; b. An embedded anode electrode assembly (30) is embedded in an anode frame (25) and includes an anode plate and a gas diffusion layer, which are connected in a sealed manner and are detachable; c. Cathode frame (27) is used to support and fix the cathode electrode assembly; The d-mounted cathode electrode assembly (29) is embedded in the cathode frame (27), including a cathode plate and a gas diffusion layer, and the two are connected in a sealed manner and are detachable; e. Gas-liquid distribution device (1) is set on the top of the device, including a carbon dioxide outlet (8) with a valve, an electrolyte inlet (9) and an air outlet (10), for uniform gas-liquid distribution and connection to the upper reactor; The reaction chamber (2) is located between the anode frame (25) and the cathode frame (27), and includes an electrolyte chamber (26), a carbon dioxide reduction chamber (28) and an air chamber (24). The three chambers are separated by a gas diffusion layer to prevent direct contact between gas and liquid. The gas-liquid distribution device (3) is located at the bottom of the device and includes a carbon dioxide inlet (31) with a valve, an electrolyte outlet (32) and an air inlet (33) for uniform gas-liquid distribution and connection to the next stage reactor. The anode column (7) is connected to the positive terminal of the power supply, and the cathode column (6) is connected to the negative terminal of the power supply. In the electrolysis process, carbon dioxide is utilized as a resource, the product is separated into gas and liquid, and high oxygen content air is prepared.

2. The apparatus according to claim 1, characterized in that, The outer edge of the upper gas-liquid distribution device (1) is provided with a carbon dioxide outlet (8), an electrolyte inlet (9) and an air outlet (10) from bottom to top. The gas and liquid distribution in the reaction chamber is uniform through the main air inlet and the sub-air and liquid inlets. The upper edge is provided with an anode column (7) and a cathode column (6). The lower edge has a protruding part for connecting with the reaction chamber (2). It can also be connected to the lower gas-liquid distribution device (3) of the next stage reactor through the connecting pipeline to form a multi-stage continuous reaction.

3. The apparatus according to claim 1, characterized in that, The reaction chamber (2) consists of a carbon dioxide reduction chamber (28), a cathode frame (27), an electrolyte chamber (26), an anode frame (25), an air chamber (24), and an outer shell, from the inside to the outside. The electrolyte chamber (26) is located between the anode frame (25) and the cathode frame (27) to improve the reaction efficiency through gas convection.

4. The apparatus according to claim 1, characterized in that, The outer edge of the lower gas-liquid distribution device (3) is provided with a carbon dioxide inlet (31), an electrolyte outlet (32) and an air inlet (33) from top to bottom. Its upper edge has a protruding part for connecting with the reaction chamber (2) and has a vent. It is connected to the upper gas-liquid distribution device (1) of the upper reactor through a connecting pipe to form a multi-stage continuous reaction.

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