Purification device for silicon tetrachloride carbon removal research and development

Abstract

The utility model discloses a purification device for silicon tetrachloride carbon removal research and development, which relates to the technical field of silicon tetrachloride purification, comprises a silicon tetrachloride storage box and a distillation device, and is characterized in that the distillation device comprises a heating seat, a plurality of annular bulges are arranged at the top of the heating seat, and the annular bulges are arranged at the bottom of the heating seat; electric heating wires are arranged in the heating base and the annular protrusion, a distillation cavity is fixedly connected to the top of the heating base, a steam inlet is formed in the top of the distillation cavity, and the steam inlet is connected with a distillation pipeline. The heating seat is provided with a plurality of annular bulges, and the electric heating wires are arranged in the annular bulges and the heating seat, so that the distillation cavity can be uniformly heated, the heating efficiency is higher, the distillation efficiency is higher, the condensation effect is better when the spiral condensation pipe is used, the purification efficiency of the device can be improved, and the device is suitable for industrial production. And a distillation pipeline and a liquid collecting piece are arranged, so that evaporated steam can be further condensed, the condensation efficiency of the device is improved, and the purification effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon tetrachloride purification, in particular to a purification device for the research and development of silicon tetrachloride carbon removal. Background Art

[0002] The main by-product of polysilicon is silicon tetrachloride. Untreated crude silicon tetrachloride is a highly corrosive and harmful liquid that poses a great threat to safety and the environment. Silicon tetrachloride will become a major problem restricting the development of polysilicon. With the expansion of polysilicon production, by-product recovery and treatment also need to keep up, otherwise large-scale production will bring great hidden dangers to production safety and environmental protection.

[0003] Silicon tetrachloride is one of the main raw materials for cold hydrogenation. Its purity will affect the purity of trichlorosilane, the raw material of polysilicon, and ultimately affect the quality of the product polysilicon. Silicon tetrachloride contains impurities during the purification process, which will cause the filter plate to be blocked, resulting in reduced purification efficiency. Therefore, a purification device for silicon tetrachloride carbon removal research and development is proposed. Utility Model Content

[0004] Technical issues solved

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a purification device for the research and development of silicon tetrachloride carbon removal.

[0006] Technical Solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a purification device for the research and development of silicon tetrachloride carbon removal, comprising a silicon tetrachloride storage tank and a distillation device, the distillation device comprising a heating seat, a plurality of annular protrusions are arranged on the top of the heating seat, electric heating wires are arranged inside the heating seat and the annular protrusions, a distillation chamber is fixedly connected to the top of the heating seat, a steam inlet is arranged on the top of the distillation chamber, the steam inlet is connected to a distillation pipeline, and a swirl fan is arranged in the distillation pipeline;

[0008] The distillation pipeline comprises a connecting pipe and a spiral condenser, wherein the connecting pipe is connected to the steam inlet, an end of the connecting pipe away from the steam inlet is connected to the spiral condenser, and a liquid collecting tank is provided at the bottom of the spiral condenser;

[0009] One end of the condenser tube is connected to a second connecting tube, the top of the second connecting tube is open, a liquid collecting piece is provided on the top of the second connecting tube, and a second liquid collecting tank is fixedly connected to the top edge of the second connecting tube;

[0010] The spiral condenser is arranged in a cold water tank, and cold water is arranged in the cold water tank.

[0011] Preferably, the liquid collecting member comprises a shell, an air inlet and an air outlet are arranged on the shell, and a sharp groove is fixedly connected to the bottom of the shell, and the sharp groove is communicated with the inside of the shell.

[0012] Preferably, there are a plurality of pointed grooves, and the plurality of pointed grooves are arranged in an array.

[0013] Preferably, the air inlet is connected to a cold air intake pipe.

[0014] Preferably, a one-way valve is connected to the exhaust port.

[0015] Preferably, the silicon tetrachloride storage tank and the distillation device are connected via a connecting pipe, and a delivery pump is provided on the connecting pipe.

[0016] Preferably, the silicon tetrachloride storage box is provided with a feed port.

[0017] Beneficial effects:

[0018] Compared with the prior art, the purification device for the research and development of silicon tetrachloride carbon removal has the following beneficial effects:

[0019] 1. The heating seat of the utility model is provided with a plurality of annular protrusions, and the electric heating wire is installed inside the annular protrusions and the heating seat, so that the distillation chamber can be heated evenly, the heating efficiency is higher, and the distillation efficiency is also higher.

[0020] 2. The spiral-shaped condenser tube of the utility model has a better condensation effect when used, which can improve the purification efficiency of the device. The distillation pipeline and liquid collecting parts provided can further condense the evaporated gas, promote the condensation efficiency of the device, and improve the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the liquid collecting member of the utility model.

[0024] In the figure:

[0025] 1. Silicon tetrachloride storage box; 101. Feed inlet; 2. Distillation device; 3. Connecting pipeline; 4. Delivery pump; 5. Cold water tank; 201. Heating seat; 202. Annular protrusion; 203. Electric heating wire; 204. Distillation chamber; 205. Steam inlet; 206. Distillation pipeline; 208. Liquid collecting tank; 209. Connecting pipe II; 210. Liquid collecting part; 2101. Shell; 2102. Air inlet; 2103. Exhaust port; 2104. Sharp groove; 2105. Cold air inlet pipe; 2106. One-way valve; 211. Liquid collecting tank II. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1 to Figure 3 As shown, the utility model provides a technical solution: a purification device for the research and development of silicon tetrachloride carbon removal, comprising a silicon tetrachloride storage box 1 and a distillation device 2, the silicon tetrachloride storage box 1 is provided with a feed inlet 101, the distillation device 2 comprises a heating seat 201, the top of the heating seat 201 is provided with a plurality of annular protrusions 202, the heating seat 201 and the annular protrusions 202 are provided with electric heating wires 203, the top of the heating seat 201 is fixedly connected with a distillation chamber 204, the top of the distillation chamber 204 is provided with a steam inlet 205, and the steam inlet 205 is connected to the distillation pipeline 2 06. The distillation pipeline 206 includes a connecting pipe 2061 and a spiral condenser 2062. The connecting pipe 2061 is connected to the steam inlet 205. The end of the connecting pipe 2061 away from the steam inlet 205 is connected to the spiral condenser 2062. A liquid collecting tank 208 is arranged at the bottom of the spiral condenser 2062. A plurality of annular protrusions 202 are arranged on the heating seat 201 of the utility model. The electric heating wire 203 is installed inside the annular protrusion 202 and the heating seat 201, so that the distillation chamber 204 can be evenly heated, the heating efficiency is higher, and the distillation efficiency is also higher.

[0028] One end of the condenser 2062 is connected to the connecting tube 209, the top of the connecting tube 209 is open, and a liquid collecting piece 210 is also provided on the top of the connecting tube 209. The top edge of the connecting tube 209 is fixedly connected to the liquid collecting tank 211. The spiral-shaped condenser 2062 has a better condensation effect when used, which can improve the purification efficiency of the device. The distillation pipeline 206 and the liquid collecting piece 210 can further condense the evaporated gas, promote the condensation efficiency of the device, and improve the purification effect.

[0029] The spiral condenser 2062 is arranged in the cold water tank 5 , and cold water is arranged in the cold water tank 5 . The cold water in the cold water tank 5 can condense the spiral condenser 2062 .

[0030] Please pay attention to Figure 2 and Figure 3 The liquid collecting part 210 includes a shell 2101, on which an air inlet 2102 and an air outlet 2103 are provided. A sharp groove 2104 is fixedly connected to the bottom of the shell 2101, and the sharp groove 2104 is connected to the inside of the shell 2101. There are several sharp grooves 2104, which are arranged in an array. The air inlet 2102 is connected to a cold air inlet pipe 2105, and a one-way valve 2106 is connected in the air outlet 2103.

[0031] Please pay attention to Figure 1 and Figure 2 The silicon tetrachloride storage tank 1 and the distillation device 2 are connected via a connecting pipe 3 , and a delivery pump 4 is provided on the connecting pipe 3 .

[0032] Working principle: The heating seat 201 of the utility model is provided with a plurality of annular protrusions 202, and the electric heating wire 203 is installed inside the annular protrusions 202 and the heating seat 201, so that the distillation chamber 204 can be evenly heated. The spiral-shaped condenser 2062 has a better condensation effect when used, which can improve the purification efficiency of the device, and the distillation pipe 206 and the liquid collecting part 210 are provided to condense the evaporated gas.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification device for the research and development of silicon tetrachloride carbon removal, comprising a silicon tetrachloride storage tank (1) and a distillation device (2), characterized in that: The distillation device (2) comprises a heating seat (201), a plurality of annular protrusions (202) are arranged on the top of the heating seat (201), electric heating wires (203) are arranged inside the heating seat (201) and the annular protrusions (202), a distillation chamber (204) is fixedly connected to the top of the heating seat (201), a steam inlet (205) is arranged on the top of the distillation chamber (204), and the steam inlet (205) is connected to a distillation pipeline (206); The distillation pipeline (206) comprises a connecting pipe (2061) and a spiral condenser (2062), wherein the connecting pipe (2061) is connected to the steam inlet (205), and the spiral condenser (2062) is connected to one end of the connecting pipe (2061) away from the steam inlet (205), and a liquid collecting tank (208) is provided at the bottom of the spiral condenser (2062); One end of the spiral condenser tube (2062) is connected to a second connecting tube (209), the top of the second connecting tube (209) is open, a liquid collecting member (210) is also provided on the top of the second connecting tube (209), and a second liquid collecting tank (211) is fixedly connected to the top edge of the second connecting tube (209); The spiral condenser (2062) is fixedly installed in a cold water tank (5), and cold water is provided in the cold water tank (5). The cold water tank is arranged inside the distillation device (2).

2. A purification device for carbon removal of silicon tetrachloride according to claim 1, characterized in that: The liquid collecting member (210) comprises a shell (2101), the shell (2101) is provided with an air inlet (2102) and an air outlet (2103), the bottom of the shell (2101) is fixedly connected with a pointed groove (2104), and the pointed groove (2104) is communicated with the inside of the shell (2101).

3. A purification device for carbon removal of silicon tetrachloride according to claim 2, characterized in that: There are a plurality of pointed grooves (2104), and the plurality of pointed grooves (2104) are arranged in an array.

4. A purification device for carbon removal of silicon tetrachloride according to claim 2, characterized in that: The air inlet (2102) is connected to the cold air inlet pipe (2105).

5. A purification device for carbon removal of silicon tetrachloride according to claim 2, characterized in that: The exhaust port (2103) is connected to a one-way valve (2106).

6. A purification device for carbon removal of silicon tetrachloride according to claim 1, characterized in that: The silicon tetrachloride storage tank (1) and the distillation device (2) are connected via a connecting pipe (3), and a delivery pump (4) is provided on the connecting pipe (3).

7. A purification device for carbon removal of silicon tetrachloride according to claim 1, characterized in that: The silicon tetrachloride storage box (1) is provided with a feed port (101).

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