Tail gas recovery liquid cooler for producing trichlorosilane

Abstract

The utility model discloses a tail gas recovery liquid cooler for producing trichlorosilane in the field of trichlorosilane production. The tail gas recovery liquid cooler comprises a tail gas recovery box, a tail gas inlet pipe, a tail gas outlet pipe, an aeration pipe and a valve. A spiral pipe is arranged in the cooling box, one end of the spiral pipe is communicated with the bottom of the tail gas recycling box, the other end of the spiral pipe extends out of the cooling box and is connected with a circulating pipe, the end of the circulating pipe is communicated with the upper portion of the tail gas recycling box, and a circulating pump is arranged on the circulating pipe. And the upper part of the right side of the cooling box is communicated with a water outlet pipe. The upper part of the left side of the cooling box is connected with an ice adding funnel; and the bottom of the cooling box is constructed into a left-high right-low inclined plane. The tail gas recovery liquid cooling device is good in cooling effect, low in equipment cost and capable of well meeting the tail gas recovery liquid cooling requirement.

Description

Technical Field

[0001] The utility model relates to the field of trichlorosilane production, in particular to a tail gas recovery liquid cooler for producing trichlorosilane. Background Art

[0002] In the field of trichlorosilane production, cooling of tail gas recovery liquid is an important link, mainly for the following reasons:

[0003] First, cooling helps to better separate and recover the components in the tail gas recovery liquid. Under high temperature conditions, the components in the tail gas recovery liquid may be in a gaseous or unstable state, making it difficult to effectively separate and recover them. By cooling, these components can be converted into a liquid or more stable state, which facilitates subsequent separation and recovery operations.

[0004] Secondly, cooling helps reduce the energy and hazard of tail gas recovery liquid. High-temperature tail gas recovery liquid may have high energy and potential hazards, such as flammability and explosion. By cooling, its energy and hazard can be reduced, improving the safety of the production process.

[0005] However, the existing tail gas recovery liquid cooler for producing trichlorosilane still has many shortcomings, such as poor cooling effect and high cooling cost, and is in urgent need of improvement. Utility Model Content

[0006] The main purpose of the utility model is to provide a tail gas recovery liquid cooler for producing trichlorosilane, which is used to solve the problems mentioned in the background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A tail gas recovery liquid cooler for producing trichlorosilane comprises a tail gas recovery box, a tail gas inlet pipe, a tail gas outlet pipe, an aeration pipe and a valve. Recovery liquid is contained in the tail gas recovery box, the tail gas inlet pipe is inserted into the recovery liquid and the end of the tail gas inlet pipe is connected to the aeration pipe. A cooling box is provided at the lower end of the tail gas recovery box, a spiral tube is provided in the cooling box, one end of the spiral tube is connected to the bottom of the tail gas recovery box, the other end of the spiral tube extends out of the cooling box and is connected to a circulation tube, the end of the circulation tube is connected to the upper part of the tail gas recovery box, and a circulation pump is provided on the circulation tube. The bottom of the left side of the cooling box is connected to a water inlet pipe, and the upper right side of the cooling box is connected to a water outlet pipe. An ice adding funnel is connected to the upper left side of the cooling box, and the bottom of the cooling box is constructed as a slope with a high left side and a low right side.

[0009] Furthermore, the water inlet pipe is arranged close to the inclined surface, and the water inlet pipe is parallel to the inclined surface.

[0010] Furthermore, the inclination angle of the inclined surface is 5°.

[0011] Furthermore, the spiral tube is arranged in the middle of the cooling box, and the aeration tube is arranged horizontally at a position close to the bottom of the tail gas recovery box.

[0012] The utility model also includes other components that enable the tail gas recovery liquid cooler for producing trichlorosilane to be used normally, and these devices or components all adopt conventional technical means in the field. In addition, the devices and components not limited in the utility model all adopt conventional technical means in the field, such as the circulating pump in this application. In the specific implementation process, the appropriate equipment or component model can be selected according to the specific working scene.

[0013] The working principle of the utility model is that the spiral tube, the circulation tube and the circulation pump can make the recovery liquid in the exhaust recovery box circulate through the cooling box. The flowing cooling water is introduced into the cooling box from the water inlet pipe, and ice cubes are added to the cooling box from the ice adding funnel at the right time. The ice cubes fall on the inclined surface at the bottom of the cooling box, and the water flow of the water inlet pipe can flush away the accumulated ice cubes, so that the ice cubes in the cooling box are fully mixed, thereby improving the cooling effect.

[0014] Compared with the prior art, the utility model has the following beneficial effects: good cooling effect, low equipment cost, and good satisfaction of the cooling demand for tail gas recovery liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the overall structure of a tail gas recovery liquid cooler for producing trichlorosilane.

[0016] In the figure: 1. exhaust gas recovery box; 2. cooling box; 3. exhaust gas inlet pipe; 4. valve; 5. aeration pipe; 6. exhaust gas outlet pipe; 7. spiral pipe; 8. circulation pipe; 9. circulation pump; 21. water inlet pipe; 22. water outlet pipe; 23. ice funnel; 24. inclined plane; 25. ice cubes. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Example:

[0019] like Figure 1As shown, a tail gas recovery liquid cooler for producing trichlorosilane comprises a tail gas recovery box 1, a tail gas inlet pipe 3, a tail gas outlet pipe 6, an aeration pipe 5 and a valve 4. The tail gas recovery box 1 contains recovery liquid, the tail gas inlet pipe 3 is inserted into the recovery liquid and the end of the tail gas inlet pipe 3 is connected to the aeration pipe 5. A cooling box 2 is provided at the lower end of the tail gas recovery box 1, and a spiral tube 7 is provided in the cooling box 2. One end of the spiral tube 7 is connected to the bottom of the tail gas recovery box 1, and the other end of the spiral tube 7 extends out of the cooling box 2 and is connected to a circulation pipe 8. The end of the circulation pipe 8 is connected to the upper part of the tail gas recovery box 1, and a circulation pump 9 is provided on the circulation pipe 8. The bottom of the left side of the cooling box 2 is connected to a water inlet pipe 21, and the upper right side of the cooling box 2 is connected to a water outlet pipe 22. An ice adding funnel 23 is connected to the upper left side of the cooling box 2, and the bottom of the cooling box 2 is constructed as a slope 24 with a high left side and a low right side.

[0020] Specifically, the water inlet pipe 21 is arranged close to the inclined plane 24, and the water inlet pipe 21 is parallel to the inclined plane 24, and the inclined plane 24 has an inclination angle of 5°. The spiral pipe 7 is arranged in the middle of the cooling box 2, and the aeration pipe 5 is arranged horizontally near the bottom of the tail gas recovery box 1.

[0021] The working principle of the exhaust gas recovery liquid cooler for producing trichlorosilane is as follows: the spiral tube 7, the circulation tube 8 and the circulation pump 9 can make the recovery liquid in the exhaust gas recovery box 1 circulate through the cooling box 2. The flowing cooling water is introduced into the cooling box 2 from the water inlet pipe 21, and ice cubes 25 are added to the cooling box 2 from the ice adding funnel 23 in time. The ice cubes 25 fall on the inclined surface 24 at the bottom of the cooling box 2, and the water flow of the water inlet pipe 21 can flush away the accumulated ice cubes 25, so that the ice cubes 25 in the cooling box 2 are fully mixed, thereby improving the cooling effect.

[0022] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope of the present invention.

Claims

1. A tail gas recovery liquid cooler for producing trichlorosilane, comprising a tail gas recovery box (1), a tail gas inlet pipe (3), a tail gas outlet pipe (6), an aeration pipe (5) and a valve (4), wherein the tail gas recovery box (1) contains recovery liquid, the tail gas inlet pipe (3) is inserted into the recovery liquid and the end of the tail gas inlet pipe (3) is connected to the aeration pipe (5), characterized in that: A cooling box (2) is provided at the lower end of the exhaust gas recovery box (1), a spiral tube (7) is provided in the cooling box (2), one end of the spiral tube (7) is connected to the bottom of the exhaust gas recovery box (1), the other end of the spiral tube (7) extends out of the cooling box (2) and is connected to a circulation tube (8), the end of the circulation tube (8) is connected to the upper part of the exhaust gas recovery box (1), and a circulation pump (9) is provided on the circulation tube (8); the left bottom of the cooling box (2) is connected to a water inlet pipe (21), and the right upper part of the cooling box (2) is connected to a water outlet pipe (22); the left upper part of the cooling box (2) is connected to an ice adding funnel (23), and the bottom of the cooling box (2) is constructed as a slope (24) with a higher left side and a lower right side.

2. The tail gas recovery liquid cooler for producing trichlorosilane according to claim 1, characterized in that: The water inlet pipe (21) is arranged close to the inclined surface (24), and the water inlet pipe (21) is parallel to the inclined surface (24).

3. The tail gas recovery liquid cooler for producing trichlorosilane according to claim 1, characterized in that: The inclination angle of the inclined surface (24) is 5°.

4. The tail gas recovery liquid cooler for producing trichlorosilane according to claim 1, characterized in that: The spiral tube (7) is arranged in the middle of the cooling box (2), and the aeration tube (5) is arranged horizontally at a position close to the bottom of the tail gas recovery box (1).

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