A device for treating dimethyldichlorosilane hydrolysis impurities

Abstract

The utility model discloses a kind of dimethyldichlorosilane hydrolysis impurities's processing device, it includes shell, several water curtain boards are installed in the shell along vertical direction and tilt downwards, the installation direction of any adjacent two water curtain boards is opposite, the inner cavity of shell is separated to form multi-stage broken line flow passage by the water curtain board, cooling plate assembly is installed in the bottom of water curtain board, mist eliminator assembly is provided above water curtain board;The beneficial effects of the utility model: the utility model designs special multi-stage broken line water curtain flow passage, makes saturated hydrochloric acid washing liquid form water curtain in water curtain flow passage, fully contacts with ascending gaseous hydrogen chloride, washes off most siloxane droplet, and designs mist eliminator to further capture small droplet, to greatly reduce the content of siloxane impurity, improve the quality of subsequent silicone product.

Description

Technical Field

[0001] This utility model relates to the technical field of dimethyldichlorosilane hydrolysis equipment, and in particular to a device for treating impurities from dimethyldichlorosilane hydrolysis. Background Technology

[0002] In the production process of organosilicon, the hydrolysis of dimethyldichlorosilane (dimethyl) is a crucial step. The reaction principle involves a certain amount of dimethyldichlorosilane reacting with water under acidic conditions to generate polydimethylsiloxane and hydrogen chloride gas. The hydrogen chloride gas is recovered in subsequent processes and used for the synthesis of chloromethane, a raw material for organosilicon production. However, in existing technologies, the gaseous hydrogen chloride generated by the hydrolysis of hydrogen chloride gas contains a certain amount of siloxane droplet impurities. When hydrogen chloride containing siloxane impurities is used in combination with other chemical products, the originally dispersed siloxane will continuously agglomerate, eventually adsorbing other organic impurities to form small black particles, affecting product quality. Therefore, this invention designs an impurity treatment device to remove siloxane impurities. Utility Model Content

[0003] The purpose of this invention is to provide a device for treating impurities from the hydrolysis of dimethyldichlorosilane, in order to solve the technical problem of siloxane impurities in the existing dimethyldichlorosilane hydrolysis process.

[0004] The present invention relates to a device for treating impurities from the hydrolysis of dimethyldichlorosilane, comprising a housing, an air outlet pipe at the top of the housing, a spray pipe, an air inlet pipe, and a drain pipe on the housing, and a plurality of water curtain plates installed vertically downward inside the housing, with the air inlet pipe and the drain pipe located below the water curtain plates and the spray pipe located above the water curtain plates. Any two adjacent water curtain plates are installed in opposite directions. The water curtain plates divide the inner cavity of the housing into multi-stage zigzag flow channels. A cooling plate assembly is installed at the bottom of the water curtain plates, and a mist eliminator assembly is installed above the water curtain plates.

[0005] Furthermore, the cooling plate assembly includes a cooling plate with a zigzag-shaped flow channel groove. The water curtain plate is fixedly covered on the flow channel groove. Cooling water inlet holes and cooling water return holes are provided on the cooling plate and communicate with the flow channel groove. The cooling water inlet holes are connected to cooling water pipes, and the cooling water return holes are connected to cooling water return pipes. Both the cooling water pipes and the cooling water return pipes are installed on the housing.

[0006] Furthermore, the water curtain plate is connected to the cooling plate by bolts, and a sealing ring is installed between the water curtain plate and the cooling plate.

[0007] Furthermore, several triangular uniformly distributed plates are evenly installed on the water curtain plate.

[0008] Furthermore, several water guide channels are evenly distributed at the ends of the water curtain plate.

[0009] Furthermore, the mist eliminator assembly includes a plurality of angled plates evenly distributed along the width direction of the housing.

[0010] The beneficial effects of this utility model are as follows: This utility model is designed with a special multi-stage zigzag water curtain channel, which allows the saturated hydrochloric acid washing liquid to form a water curtain in the water curtain channel, fully contacting the rising gaseous hydrogen chloride, washing away the vast majority of siloxane droplets, and designing a mist eliminator to further capture fine droplets, thereby significantly reducing the content of siloxane impurities and improving the quality of subsequent organosilicon products. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present utility model;

[0012] Figure 2 This is a top view of the present invention;

[0013] Figure 3 This is a cross-sectional view of the present invention;

[0014] Figure 4 This is a 3D view of the installation structure of the water curtain plate and cooling plate;

[0015] In the figure, the components are: shell 1, water curtain plate 2, cooling plate 3, flow channel 4, cooling water inlet hole 5, cooling water return hole 6, uniform distribution plate 7, water guide channel 8, cooling water pipe 9, cooling water return pipe 10, spray pipe 11, angle plate 12, air outlet pipe 13, air inlet pipe 14, drain pipe 15, and multi-stage zigzag flow channel 16. Detailed Implementation Example

[0016] like Figures 1 to 3 As shown, a device for treating impurities from the hydrolysis of dimethyldichlorosilane includes a housing 1. An air outlet pipe 13 is provided at the top of the housing 1. A spray pipe 11, an air inlet pipe 14, and a drain pipe 15 are provided on the housing 1. Several water curtain plates 2 are installed vertically downward inside the housing 1. The air inlet pipe 14 and the drain pipe 15 are located below the water curtain plates 2, and the spray pipe 11 is located above the water curtain plates 2. Any two adjacent water curtain plates 2 are installed in opposite directions. The water curtain plates 2 divide the inner cavity of the housing 1 into multi-stage zigzag flow channels 16. A cooling plate assembly is installed at the bottom of the water curtain plates 2, and a mist eliminator assembly is provided above the water curtain plates 2.

[0017] like Figures 2 to 4As shown, the cooling plate assembly includes a cooling plate 3, on which a zigzag-shaped flow channel groove 4 is formed. The water curtain plate 2 is fixedly covered on the flow channel groove 4. Cooling water inlet hole 5 and cooling water return hole 6 are formed on the cooling plate 3 and communicate with the flow channel groove 4. The cooling water inlet hole 5 is connected to the cooling water pipe 9, and the cooling water return hole 6 is connected to the cooling water return pipe 10. The cooling water pipe 9 and the cooling water return pipe 10 are both installed on the housing 1. In order to improve the sealing performance, the water curtain plate 2 is connected to the cooling plate 3 by bolts. A sealing ring is installed between the water curtain plate 2 and the cooling plate 3. In order to make the cooling water flow flat on the water curtain plate 2, several triangular uniformly distributed plates 7 are evenly distributed on the water curtain plate 2. Several water guide grooves 8 are evenly distributed at the ends of the water curtain plate 2. The mist eliminator assembly includes several angled plates 12 evenly distributed along the width direction of the housing 1. The angled plates 12 are V-shaped.

[0018] When this invention is used, such as Figures 1 to 4 As shown, the saturated hydrochloric acid washing liquid is easily sprayed onto the water curtain plate 2 through the spray pipe 11. After the distribution effect of the distribution plate 7, the washing liquid flows slowly in a flat manner, forming a washing liquid water curtain, and flows along the multi-stage zigzag flow channel 16. At the same time, the hydrogen chloride gas with siloxane impurities generated after hydrolysis flows from the air inlet pipe 14 through the multi-stage zigzag flow channel 16 and fully contacts the washing liquid spread on the water curtain plate 2. After passing through the mist eliminator assembly, the impurities are washed away and discharged through the air outlet pipe 13. Meanwhile, the cooling water enters from the cooling water pipe 9 and passes through the cooling return water pipe 10, the cooling water inlet hole 5, the flow channel 4, the cooling return water hole 6, and the cooling return water pipe 10 in sequence, cooling the washing liquid on the water curtain plate 2.

[0019] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for treating impurities from the hydrolysis of dimethyldichlorosilane, characterized in that: It includes a housing (1), an air outlet pipe (13) is provided at the top of the housing (1), and a spray pipe (11), an air inlet pipe (14) and a drain pipe (15) are provided on the housing (1). The feature is that: a plurality of water curtain plates (2) are installed vertically downward inside the housing (1), the air inlet pipe (14) and the drain pipe (15) are located below the water curtain plates (2), the spray pipe (11) is located above the water curtain plates (2), any two adjacent water curtain plates (2) are installed in opposite directions, the water curtain plates (2) divide the inner cavity of the housing (1) to form a multi-stage zigzag flow channel (16), a cooling plate assembly is installed at the bottom of the water curtain plates (2), and a mist trap assembly is provided above the water curtain plates (2).

2. The apparatus for treating impurities from the hydrolysis of dimethyldichlorosilane according to claim 1, characterized in that: The cooling plate assembly includes a cooling plate (3), on which a zigzag-shaped flow channel groove (4) is formed. The water curtain plate (2) is fixedly covered on the flow channel groove (4). The cooling plate (3) has a cooling water inlet hole (5) and a cooling water return hole (6) connected to the flow channel groove (4). The cooling water inlet hole (5) is connected to the cooling water pipe (9), and the cooling water return hole (6) is connected to the cooling water return pipe (10). The cooling water pipe (9) and the cooling water return pipe (10) are both installed on the housing (1).

3. The apparatus for treating impurities from the hydrolysis of dimethyldichlorosilane according to claim 2, characterized in that: The water curtain plate (2) is connected to the cooling plate (3) by bolts, and a sealing ring is installed between the water curtain plate (2) and the cooling plate (3).

4. The apparatus for treating impurities from the hydrolysis of dimethyldichlorosilane according to claim 1, characterized in that: Several triangular uniformly distributed plates (7) are evenly installed on the water curtain plate (2).

5. The apparatus for treating impurities from the hydrolysis of dimethyldichlorosilane according to claim 4, characterized in that: Several water guide channels (8) are evenly distributed at the end of the water curtain plate (2).

6. The apparatus for treating impurities from the hydrolysis of dimethyldichlorosilane according to claim 5, characterized in that: The fog eliminator assembly includes a plurality of angled plates (12) evenly distributed along the width direction of the housing (1).

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