Carbon dioxide tail gas purification device

Abstract

The utility model discloses a carbon dioxide tail gas purification device, include: first compressor, second compressor, heat exchanger, gas output with first compressor's, second compressor's gas output is connected through the pipeline respectively, heater, is connected through the pipeline with heat exchanger, reactor, is connected through the pipeline with heater, and the gas outlet of reactor is connected purification gas discharge pipe, and the purification gas discharge pipe passes through heat exchanger, to make the purification gas in purification gas discharge pipe and the raw material gas in heat exchanger and air carry out heat exchange. The utility model discloses a carbon dioxide tail gas purification device is especially suitable for eliminating the flammability gas in emission gas. The utility model discloses a carbon dioxide tail gas purification device is stable and reliable, and simple operation. Through the carbon dioxide tail gas purification device of the utility model can obtain the product of corresponding purity, satisfies the demand of subsequent production.

Description

Technical Field

[0001] This invention relates to the purification and recycling of gases, and in particular to a carbon dioxide exhaust gas purification device. Background Technology

[0002] Chemical plants produce exhaust gases containing large amounts of carbon dioxide during production. This carbon dioxide can be extracted and used for various purposes. Commonly used carbon dioxide extraction technologies include the following:

[0003] 1. Absorption method: This method uses chemical absorbents to absorb carbon dioxide from exhaust gas, followed by thermal decomposition or pressurization to release it. This method is suitable for large-scale production, but the absorbent needs to be replaced periodically, increasing production costs.

[0004] 2. Physical adsorption method: This method utilizes the adsorption properties of carbon dioxide on the surface of porous adsorption materials to separate it from other gases. This method has advantages such as high efficiency, low cost, and ease of operation; however, the need to control temperature and pressure affects its practicality.

[0005] 3. Membrane separation method: This method uses pressure difference to separate carbon dioxide from other gases. It has the advantages of high efficiency, no need for chemical absorbents, and easy operation, but it requires a high level of technical and equipment investment.

[0006] The extracted carbon dioxide can be used in the following ways:

[0007] 1. Food industry: As a raw material for carbonated beverages, it can be used in the production of yogurt, beer, etc.

[0008] 2. Industrial production: as a raw material or catalyst in chemical reactions, such as in the purification of mineral oil.

[0009] 3. Ecological and environmental protection: In the field of environmental protection, carbon dioxide can be used to promote plant growth and degrade carbon dioxide in the atmosphere.

[0010] Exhaust gas, which is mainly composed of carbon dioxide, may contain small amounts of flammable components such as hydrogen and methane. These components need to be removed in order to meet emission standards. Utility Model Content

[0011] The purpose of this invention is to provide a carbon dioxide exhaust gas purification device that is particularly suitable for exhaust gases containing combustible gases.

[0012] The carbon dioxide exhaust gas purification device of this utility model is characterized by comprising:

[0013] The first compressor used to boost the pressure of the raw material gas;

[0014] A second compressor for pressurizing air;

[0015] The heat exchanger used for heating the raw material gas and air is connected to the gas outlet of the first compressor and the gas outlet of the second compressor respectively through pipelines.

[0016] A heater used to heat raw gas and air, connected to a heat exchanger via pipeline;

[0017] A reactor for oxidizing hydrogen or methane in a feed gas is connected to a heater via a pipeline. The gas outlet of the reactor is connected to a purified gas discharge pipe, which passes through a heat exchanger to allow the purified gas in the discharge pipe to exchange heat with the feed gas and air in the heat exchanger.

[0018] The present invention relates to a carbon dioxide exhaust gas purification device, wherein the bottom of the reactor is provided with a liquid outlet, and the liquid outlet is connected to a liquid discharge pipe.

[0019] This invention relates to a carbon dioxide exhaust gas purification device, which is particularly suitable for removing flammable gases from exhaust gases. The device is stable, reliable, and easy to operate. Using this device, products of the required purity can be obtained to meet the needs of subsequent production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the carbon dioxide exhaust gas purification device of this utility model. Detailed Implementation

[0021] like Figure 1 As shown, the carbon dioxide exhaust gas purification device of this utility model includes:

[0022] The first compressor C1 is used to boost the pressure of the raw material gas;

[0023] The second compressor C2 is used to boost air pressure;

[0024] The heat exchanger E1, used for heating the raw material gas and air, is connected to the gas outlet of the first compressor and the gas outlet of the second compressor respectively through pipelines.

[0025] The heater E2, used for heating the raw gas and air, is connected to the heat exchanger via a pipeline.

[0026] A reactor V1, used to oxidize hydrogen or methane in the raw material gas, is connected to a heater via a pipeline. The gas outlet of the reactor V1 is connected to a purified gas discharge pipe 11, which passes through a heat exchanger E1 to allow the purified gas in the purified gas discharge pipe to exchange heat with the raw material gas and air in the heat exchanger.

[0027] The present invention relates to a carbon dioxide exhaust gas purification device, wherein the bottom of the reactor V1 is provided with a liquid outlet, and the liquid outlet is connected to a liquid discharge pipe 12.

[0028] The equipment of this utility model for purifying carbon dioxide exhaust gas includes: a heat exchanger, a compressor, a reactor, a separator, and related valves and pipes.

[0029] The heat exchanger can be a plate-fin heat exchanger, a plate heat exchanger, a coiled tube heat exchanger, or a shell-and-tube heat exchanger.

[0030] The raw material gas is a mixture of gases, mainly carbon dioxide, and containing small amounts of flammable gases such as hydrogen and methane.

[0031] A compressor can be a gas pressurization device such as a fan or pump.

[0032] The reactor is filled with catalyst.

[0033] The working process of this carbon dioxide exhaust gas purification device is as follows:

[0034] The raw gas, after being pressurized by compressor C1, enters heat exchanger E1 for heating. Air, after being pressurized by compressor C2, also enters heat exchanger E1 for heating. The raw gas and air then enter heater E2 and are heated to approximately 180 degrees Celsius (the purpose is to raise the temperature to reach the catalytic oxidation reaction temperature, which is beneficial for the reaction). Finally, they enter reactor V1, where the combustible components in the raw gas and air undergo a catalytic oxidation process, reacting to remove the combustible components. These combustible components include methane, carbon monoxide, hydrogen, and other combustible gases. The combustible components react with oxygen to produce water and carbon dioxide. The reacted gas stream enters heat exchanger E1 for heat exchange before being discharged as purified gas.

[0035] Removing methane from carbon dioxide exhaust can be achieved through catalytic combustion technology. Catalytic combustion is a process that uses a catalyst to promote a chemical reaction at high temperatures, converting combustible gases in organic waste gas into harmless substances. Specifically, methane catalytic combustion technology uses the precious metal platinum as a catalyst to form an oxide film at high temperatures. This oxide film adheres to organic molecules, causing them to react with oxygen to produce carbon dioxide and water, thus completing the waste gas treatment process.

[0036] This invention relates to a carbon dioxide exhaust gas purification device, which is particularly suitable for removing flammable gases from exhaust gases. The device is stable, reliable, and easy to operate. Using this device, products of the required purity can be obtained to meet the needs of subsequent production.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A carbon dioxide tail gas purification apparatus characterized by comprising: Comprise: a first compressor for pressurizing raw gas; a second compressor for pressurizing air; a heat exchanger for heating raw gas and air, which is connected with the gas outlet of the first compressor and the gas outlet of the second compressor through pipelines respectively; a heater for heating raw gas and air, which is connected with the heat exchanger through a pipeline; a reactor for oxidizing hydrogen or methane in raw gas, which is connected with the heater through a pipeline, and the gas outlet of the reactor is connected with a purified gas discharge pipe, which passes through the heat exchanger so that the purified gas in the purified gas discharge pipe exchanges heat with raw gas and air in the heat exchanger.

2. The carbon dioxide off-gas purification device according to claim 1, wherein The bottom of the reactor is provided with a liquid discharge outlet, which is connected with a liquid discharge pipe.

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