Device for recycling carbon dioxide in acrylate tail gas

Abstract

The utility model relates to the field of chemical equipment structures, in particular to a device for recycling carbon dioxide in acrylate tail gas, which comprises an alkali spray tower, a recycled alkali liquor storage tank, a circulating pump A, a circulating pump B and a circulating condenser, according to the utility model, the liquid alkali in the recovered alkali liquor storage tank passes through the circulating pump A and the circulating condenser and then circularly enters the alkali spray tower to form circulating liquid alkali spray liquid, and the acrylate tail gas enters the alkali spray tower from the bottom and is absorbed by the circulating liquid alkali spray liquid in the alkali spray tower; when the content of sodium carbonate in the liquid caustic soda spraying liquid reaches the recycling requirement, the liquid is transferred to a workshop to be continuously recycled for a washing process, so that washing raw materials are saved, the pressure of subsequent tail gas treatment is also reduced, and the concepts of low carbon emission and green production are achieved.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment structures, and particularly to a device for recycling carbon dioxide in acrylate tail gas. Background Art

[0002] During the production process of acrylate, an alkali washing process is required. Sodium carbonate solution and sodium hydroxide solution are used for alkali washing. A large amount of carbon dioxide is generated during the alkali washing process, which does not conform to the green production concept of energy conservation and emission reduction. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a device for recycling carbon dioxide in acrylate tail gas, and solve the problem that a large amount of carbon dioxide generated during the alkali washing process does not conform to the green production concept of energy conservation and emission reduction.

[0004] To solve the above technical problem, the technical solution of the utility model is: a device for recycling carbon dioxide in acrylate tail gas, the innovation of which lies in: including an alkali spray tower, a recycled alkali liquid storage tank, a circulation pump A, a circulation pump B and a circulation condenser;

[0005] An outlet and an exhaust gas inlet are provided at the bottom side of the alkali spray tower, and the outlet is connected to the recycled alkali liquid storage tank;

[0006] An inlet is provided at the top side of the alkali spray tower, and the inlet is connected to the circulation condenser;

[0007] A circulation pump A is connected between the recycled alkali liquid storage tank and the circulation condenser;

[0008] The recycled alkali liquid storage tank is also connected to the circulation pump B.

[0009] Furthermore, the recycled alkali liquid storage tank is also connected to a liquid alkali storage tank, and the recycled alkali liquid storage tank is also connected to a hot water storage tank.

[0010] Furthermore, an exhaust gas outlet is also provided at the top end of the alkali spray tower, and is connected to a tail gas output pipeline for transmitting for subsequent treatment of the tail gas.

[0011] Furthermore, the hot water storage tank is also connected to the alkali spray tower.

[0012] Furthermore, a tee pipeline is provided at the outlet of the circulation pump A. The first pipe orifice of the tee pipeline is connected to the outlet of the circulation pump A, the second pipe orifice of the tee pipeline is connected to the circulation condenser, and the third pipe orifice is used for connecting a pipeline to the workshop for continued reuse.

[0013] The advantages of the utility model are as follows:

[0014] In the present utility model, the liquid caustic soda in the recycled caustic soda storage tank circulates through circulation pump A and the circulation condenser and then enters the caustic soda spray tower in a cycle to form a circulating liquid caustic soda spray liquid. The acrylic ester tail gas enters the caustic soda spray tower from the bottom and is absorbed in the caustic soda spray tower by the circulating liquid caustic soda spray liquid. When the sodium carbonate content in the liquid caustic soda spray liquid reaches the reuse requirement, the liquid is transferred to the workshop for continued reuse in the water washing process, saving the water washing raw materials and reducing the pressure of the subsequent tail gas treatment at the same time, achieving the concept of low-carbon emission and green production. Brief Description of the Drawings

[0015] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0016] Figure 1 It is a structural schematic diagram of the present utility model. Specific Embodiments

[0017] As Figure 1 shown, a device for recovering and utilizing carbon dioxide in acrylic ester tail gas includes a caustic soda spray tower 1, a recycled caustic soda storage tank 2, a circulation pump A 3, a circulation pump B 4 and a circulation condenser 5;

[0018] The bottom side of the caustic soda spray tower 1 is provided with an outlet and an exhaust gas inlet. The outlet is connected to the recycled caustic soda storage tank 2 through a first pipeline 6, and a tail gas input pipeline 9 is installed at the exhaust gas inlet. The acrylic ester tail gas from the workshop enters the caustic soda spray tower 1 through the tail gas delivery pipeline;

[0019] The top side of the caustic soda spray tower 1 is provided with an inlet, and the inlet is connected between the circulation condenser 5 and a hot water storage tank 7 through a second three-way pipeline;

[0020] The top end of the caustic soda spray tower 1 is also provided with an exhaust gas outlet, which is connected to a tail gas output pipeline 10 for transmitting the tail gas for subsequent treatment.

[0021] A tail gas inlet valve and a tail gas outlet valve are respectively installed on the tail gas input pipeline 9 and the tail gas output pipeline 10.

[0022] The recycled caustic soda storage tank 2 is also connected to a liquid caustic soda storage tank 8 through a second pipeline, and the recycled caustic soda storage tank 2 is also connected to a hot water storage tank 7 through a third pipeline.

[0023] The recycled caustic soda storage tank 2 is respectively connected to the circulation pump A 3 and the circulation pump B 4 through a third three-way pipeline. A three-way pipeline is provided at the outlet of the circulation pump A 3. The first pipe orifice of the three-way pipeline is connected to the outlet of the circulation pump A 3, the second pipe orifice of the three-way pipeline is connected to the circulation condenser 5, and the third pipe orifice is used to connect a pipeline to the workshop for continued reuse.

[0024] The circulation pump B 4 is also connected to the workshop through a fourth pipeline for continued reuse.

[0025] Working principle of this patent:

[0026] First, send the 40°C hot water in the hot water storage tank 7 and the liquid alkali in the liquid alkali storage tank into the recycled alkali liquid storage tank 2 in proportion, so that the concentration of the recycled absorbed liquid alkali is 4.89 - 5.12%. Make the absorption liquid circulate in the alkali spray tower 1 through the circulation pump A3. Then, open the tail gas inlet valve and the tail gas outlet valve simultaneously for cyclic absorption. Conduct a cyclic liquid test every 4 hours to determine the content of sodium carbonate in the cyclic liquid. When the content of sodium carbonate reaches 14.75% - 15.13%, pump the absorption liquid into the workshop for reuse, and then continue to prepare the cyclic absorption alkali liquid for tail gas absorption treatment. This device saves the water washing raw materials, reduces the pressure of the subsequent tail gas treatment at the same time, and achieves the concept of low-carbon emission and green production.

[0027] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An apparatus for recovering and utilizing carbon dioxide in acrylic ester tail gas, characterized in that: It includes an alkali spray tower, a recycled alkali liquid storage tank, circulation pump A, circulation pump B and a circulation condenser; An outlet and an exhaust gas inlet are provided at the bottom side of the alkali spray tower, and the outlet is connected to the recycled alkali liquid storage tank; An inlet is provided at the top side of the alkali spray tower, and the inlet is connected to the circulation condenser; A circulation pump A is connected between the recycled alkali liquid storage tank and the circulation condenser; The recycled alkali liquid storage tank is also connected to the circulation pump B.

2. The device for recovering and utilizing carbon dioxide in acrylic ester tail gas according to claim 1, characterized in that: The recycled alkali liquid storage tank is also connected to a liquid alkali storage tank and a hot water storage tank.

3. The device for recycling carbon dioxide in acrylic ester tail gas according to claim 1, characterized in that: An exhaust gas outlet is also provided at the top end of the alkali spray tower and is connected to an exhaust gas output pipeline.

4. The device for recycling carbon dioxide in acrylic ester tail gas according to claim 2, characterized in that: The hot water storage tank is also connected to the alkali spray tower.

5. The device for recycling carbon dioxide in acrylic ester tail gas according to claim 1, characterized in that: A tee pipe is provided at the outlet of the circulation pump A. The first pipe orifice of the tee pipe is connected to the outlet of the circulation pump A, and the second pipe orifice of the tee pipe is connected to the circulation condenser.

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