Chemical difluoro-chloroethane production raw material gas mixer

Abstract

The utility model provides a kind of chemical difluoro monochloroethane production raw material gas mixer, it is characterized in that, including the first vaporizer for gasification chlorine and the second vaporizer for gasification difluoroethane, the first vaporizer is connected with first gas pipe, the first gas pipe is connected with first buffer tank, the first buffer tank is connected with second gas pipe, the first gas pipe is connected with gas mixing tank, the second vaporizer is connected with third gas pipe, the third gas pipe is connected with second buffer tank, the second buffer tank is connected with fourth gas pipe, the third gas pipe is connected with gas mixing tank, the top of gas mixing tank is connected with mixed gas pipe.The utility model sets up buffer pipe to buffer gas to ensure that the gas pressure of gas entering gas mixing tank remains stable;Water jacket is set on buffer tank to insulate gas, to prevent gas from re-liquefying due to temperature fluctuation.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology and relates to a raw material gas mixer for the production of difluorochloroethane. Background Technology

[0002] In the field of fine chemicals, particularly in the production of difluorochloroethane (R142b), the uniformity of mixing the raw material gases chlorine and difluoroethane has a crucial impact on the conversion rate of the photochlorination reaction. In the traditional process, liquid chlorine and R152a enter the vaporizer through their respective pipelines, are converted into gases, pre-mixed within the pipelines, and then enter the photochlorination reaction tower for the reaction. However, this traditional method has significant limitations and shortcomings.

[0003] Firstly, due to the significant differences in physical properties between liquid chlorine and difluoroethane—chlorine has a high density and strong corrosiveness, while difluoroethane is lighter and chemically more stable—the initial mixing in the pipeline often fails to achieve ideal uniformity. During transport, localized concentrations of excessively high or low concentrations can easily occur, leading to uneven mixing of the materials entering the photochlorination reaction tower. This not only affects reaction efficiency but may also increase byproducts, reducing the purity and quality of the final product.

[0004] Secondly, traditional mixer designs fail to fully consider the differences in characteristics between the two materials, especially lacking targeted optimization in the feeding method. For example, when chlorine and R152a enter the mixer at the same level, the density difference between them cannot be fully utilized to promote natural mixing.

[0005] Furthermore, the lack of an effective filler layer or other auxiliary structures inside the mixer further limits the potential for improving the mixing effect.

[0006] Precise temperature and pressure control are required during the vaporization of liquid chlorine and R152a to ensure complete conversion and prevent residual liquid from contaminating subsequent processes. However, traditional vaporizers and buffer tanks often lack adequate insulation, leading to temperature fluctuations that negatively impact vaporization efficiency. This problem is particularly pronounced in cold seasons or low ambient temperatures, potentially resulting in incomplete vaporization of some materials and consequently affecting the stability of the entire system. Utility Model Content

[0007] The purpose of this invention is to address the problem of poor gas mixing effect in the preparation of difluorochloroethane in the prior art, and to provide a raw material gas mixer for the production of difluorochloroethane in the chemical industry.

[0008] Therefore, the present invention adopts the following technical solution: A feed gas mixer for the production of difluorochloroethane includes a first vaporizer for vaporizing chlorine and a second vaporizer for vaporizing difluoroethane. The first vaporizer is connected to a first gas delivery pipe, which is connected to a first buffer tank. The first buffer tank is connected to a second gas delivery pipe and a gas mixing tank. The second vaporizer is connected to a third gas delivery pipe, which is connected to a second buffer tank. The second buffer tank is connected to a fourth gas delivery pipe, which is connected to the gas mixing tank. A mixing gas delivery pipe is connected to the top of the gas mixing tank.

[0009] Furthermore, the gas mixing tank has a chlorine inlet on its side wall, and a difluoroethane inlet is located directly below the chlorine inlet. The second gas delivery pipe is connected to the chlorine inlet, and the fourth gas delivery pipe is connected to the difluoroethane inlet.

[0010] Furthermore, the first gas supply pipe is connected to the bottom end of the first buffer tank, and the second gas supply pipe is connected to the top end of the first buffer tank.

[0011] Furthermore, the third gas supply pipe is connected to the bottom end of the second buffer tank, and the fourth gas supply pipe is connected to the top end of the second buffer tank.

[0012] Furthermore, the gas mixing tank is provided with a packing layer, which is located at the top of the gas mixing tank.

[0013] Furthermore, the first buffer tank is equipped with a first water jacket.

[0014] Furthermore, the second buffer tank is equipped with a second water jacket.

[0015] The beneficial effects of this invention are as follows: A buffer tube is installed to buffer the gas, ensuring stable gas pressure upon entering the gas mixing tank; a water jacket is installed on the buffer tank to insulate the gas and prevent re-liquefaction due to temperature fluctuations; a height difference feeding design is adopted, utilizing natural gravity and density differences to promote initial gas mixing; a packing layer is added to increase the complexity of the gas flow path, enhancing the mixing effect and ensuring the high uniformity of the final mixed gas. This effectively improves the quality of gas mixing. Attached Figure Description

[0016] Figure 1 This is a schematic front view of the structure of this utility model; In the diagram, 1-first vaporizer, 2-second vaporizer, 3-first gas supply pipe, 4-first buffer tank, 5-second gas supply pipe, 6-gas mixing tank, 7-third gas supply pipe, 8-second buffer tank, 9-fourth gas supply pipe, 10-chlorine inlet, 11-difluoroethane inlet, 12-mixing gas supply pipe, 13-packing layer, 14-support mesh plate, 15-first water jacket, 16-second water jacket. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings: As shown in Figure 1, a feed gas mixer for the production of difluorochloroethane includes a first vaporizer 1 for vaporizing chlorine and a second vaporizer 2 for vaporizing difluoroethane. Both the first vaporizer 1 and the second vaporizer 2 employ conventional tubular heat exchangers to heat liquid chlorine or difluoroethane, causing it to vaporize. The first vaporizer 1 is connected to a first gas delivery pipe 3, which is connected to a first buffer tank 4 for stabilizing and buffering the chlorine gas. The first buffer tank 4 is connected to a second gas delivery pipe 5. Specifically, the first gas supply pipe 3 is connected to the bottom end of the first buffer tank 4, the second gas supply pipe 5 is connected to the top end of the first buffer tank 4, the second gas supply pipe 5 is connected to a gas mixing tank 6, the second vaporizer 2 is connected to a third gas supply pipe 7, the third gas supply pipe 7 is connected to a second buffer tank 8, the second buffer tank 8 is connected to a fourth gas supply pipe 9, the fourth gas supply pipe 9 is connected to the gas mixing tank 6, specifically, the side wall of the gas mixing tank 6 is provided with a chlorine inlet 10, and directly below the chlorine inlet 10 is a difluoroethane inlet 11, the second Gas pipe 5 is connected to chlorine inlet 10, and fourth gas pipe 9 is connected to difluoroethane inlet 11. Chlorine inlet 10 is about 1 meter higher than difluoroethane inlet 11. Utilizing the density difference between the two gases, the higher density chlorine enters from the upper part of the gas mixing tank 6, while the lower density difluoroethane enters from the lower part. This helps to fully utilize natural gravity and promotes the initial mixing of the two gases upon entering the mixer, improving mixing efficiency. A mixing gas pipe 12 is connected to the top of the gas mixing tank 6, through which the mixed gas can be discharged. A packing layer 13 is provided inside the gas mixing tank 6, located at the top of the gas mixing tank 6. The packing layer 13 is composed of stainless steel Pall rings. Specifically, a support mesh plate 14 is provided inside the gas mixing tank 6, on which stainless steel Pall rings are stacked to form the packing layer 13. The packing layer 13 increases the complexity of the gas flow path, allowing the two gases to further contact and mix fully when passing through the packing layer 13, ensuring the uniformity of the final mixed gas and improving the mixing effect.

[0018] In addition, the first buffer tank 4 is provided with a first water jacket 15, which is used to keep the chlorine gas in the first buffer tank 4 warm. The second buffer tank 8 is provided with a second water jacket 16, which is used to keep the difluoroethane in the second buffer tank 8 warm. The first water jacket 15 and the second water jacket 16 are conventional water jackets, which are kept warm by hot water.

[0019] The method of using this utility model is as follows: Liquid chlorine and liquid difluoroethane are vaporized through the first vaporizer 1 and the second vaporizer 2 to form chlorine gas and difluoroethane. The chlorine gas is transported to the first buffer tank 4 through the first gas delivery pipe 3, and the difluoroethane is transported to the second buffer tank 8 through the third gas delivery pipe 7. The buffering effect of the first and second buffer tanks 4 and 8 reduces the flow rate of the chlorine gas and difluoroethane, ensuring stable gas pressure entering the gas mixing tank 6. Simultaneously, the first water jacket 15 and the second water jacket 16 insulate the chlorine gas and difluoroethane in the first and second buffer tanks 4 and 8, ensuring effective vaporization and preventing re-liquefaction or other adverse changes due to temperature fluctuations. The buffered chlorine gas and difluoroethane are then fed into the gas mixing tank 6 through the second gas delivery pipe 5 and the fourth gas delivery pipe 4, respectively. Specifically, the chlorine gas in the second gas delivery pipe 5 is transported through… Chlorine gas enters the gas mixing tank 6 through inlet 10. Difluoroethane gas in the fourth gas delivery pipe 9 enters the gas mixing tank 6 through inlet 11. Since inlet 11 is directly below chlorine gas inlet 10, the density difference between the two gases allows the heavier chlorine gas to enter from the upper part of the mixing tank 6, while the lighter difluoroethane gas enters from the lower part. This helps to fully utilize gravity and promotes initial mixing of the two gases upon entering the mixing tank 6, improving mixing efficiency. After mixing in the gas mixing tank 6, the two gases move upwards. When passing through the packing layer 13, the complexity of the gas flow path is increased, allowing the two gases to further contact and mix fully during passage, ensuring the uniformity of the final mixed gas. After mixing, the mixture is output to the corresponding equipment through mixing delivery pipe 12.

Claims

1. A feed gas mixer for the production of difluorochloroethane in the chemical industry, characterized in that, It includes a first vaporizer (1) for vaporizing chlorine and a second vaporizer (2) for vaporizing difluoroethane. The first vaporizer (1) is connected to a first gas supply pipe (3). The first gas supply pipe (3) is connected to a first buffer tank (4). The first buffer tank (4) is connected to a second gas supply pipe (5). The second gas supply pipe (5) is connected to a gas mixing tank (6). The second vaporizer (2) is connected to a third gas supply pipe (7). The third gas supply pipe (7) is connected to a second buffer tank (8). The second buffer tank (8) is connected to a fourth gas supply pipe (9). The fourth gas supply pipe (9) is connected to the gas mixing tank (6). The top of the gas mixing tank (6) is connected to a mixing gas supply pipe (12).

2. The chemical difluorochloroethane production feed gas mixer according to claim 1, characterized in that, The gas mixing tank (6) has a chlorine inlet (10) on its side wall, and a difluoroethane inlet (11) is located directly below the chlorine inlet (10). The second gas supply pipe (5) is connected to the chlorine inlet (10), and the fourth gas supply pipe (9) is connected to the difluoroethane inlet (11).

3. The chemical difluorochloroethane production feed gas mixer according to claim 1, characterized in that, The first gas supply pipe (3) is connected to the bottom end of the first buffer tank (4), and the second gas supply pipe (5) is connected to the top end of the first buffer tank (4).

4. The chemical difluorochloroethane production feed gas mixer according to claim 1, characterized in that, The third gas supply pipe (7) is connected to the bottom end of the second buffer tank (8), and the fourth gas supply pipe (9) is connected to the top end of the second buffer tank (8).

5. A chemical difluorochloroethane production feed gas mixer according to claim 1, characterized in that, The gas mixing tank (6) is provided with a packing layer (13), which is located at the top of the gas mixing tank (6).

6. The chemical difluorochloroethane production feed gas mixer according to claim 1, characterized in that, The first buffer tank (4) is provided with a first water jacket (15).

7. A chemical difluorochloroethane production feed gas mixer according to claim 1, characterized in that, The second buffer tank (8) is equipped with a second water jacket (16).

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