Light impurity removal tail gas circulating device

Abstract

The utility model discloses a light impurity removal tail gas circulating device, and relates to the technical field of silicon tetroxide preparation, the light impurity removal tail gas circulating device comprises a connecting pipe, one end of the connecting pipe is connected with an impurity removal device, one end, far away from the connecting pipe, of the impurity removal device is fixedly connected with a circulating return pipe, the impurity removal device comprises a shell, a water tank is arranged on one side of the interior of the shell, and a water outlet is formed in the other side of the shell. The water tank is fixedly connected with an air inlet pipe, the air inlet pipe is connected with the connecting pipe, the bottom of the air inlet pipe is fixedly connected with a plurality of air outlet nozzles, the interior of the water tank is further fixedly connected with a filter screen, and the air outlet nozzles are all fixedly installed on the filter screen. When the impurity removal device is used, waste gas generated during silicon tetroxide preparation is conveyed into the gas inlet pipe through the connecting pipe, the waste gas is discharged from the gas outlet nozzle, impurities in the waste gas can be filtered through the filtering liquid arranged in the water tank, and part of the filtered impurities are retained below the filter screen under the blocking of the filter screen. Quick drainage is facilitated during drainage of the drainage port, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon tetroxide preparation, in particular to a light impurity removal tail gas circulation device. Background Art

[0002] Silicon tetrachloride is an inorganic substance with the chemical formula SiCl4. High-purity silicon tetrachloride is a colorless and transparent liquid. The lower purity silicon tetrachloride is slightly yellowish or light yellow with a suffocating odor. It is corrosive to the skin. The density is 1.48 at room temperature and pressure, the melting point is -70℃, and the boiling point is 57.6℃. The boiling point increases with the increase of pressure. It hydrolyzes into silicic acid and hydrogen chloride in humid air. It hydrolyzes violently when it meets water, and it can also react violently with alcohols. It is used to make silicates, silicone monomers, silicone oils, high-temperature insulating paints, silicone resins, silicone rubbers, etc. Most of the industrial production is obtained by the high-temperature synthesis reaction of silicon powder and hydrogen chloride.

[0003] In the prior art, the tail gas of silicon tetrachloride is treated by spraying with an alkaline absorption liquid to convert it into acidic wastewater and salt mud containing silicon dioxide. However, the tail gas of silicon tetrachloride cannot be completely treated by spraying alone, resulting in low treatment efficiency. 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 light impurity exhaust gas circulation device.

[0006] Technical Solution

[0007] To achieve the above object, the utility model provides the following technical solution: a light impurity removal tail gas circulation device, comprising a connecting pipe, one end of the connecting pipe is connected to the impurity removal device, and the end of the impurity removal device away from the connecting pipe is fixedly connected to a circulation reflux pipe;

[0008] The impurity removal device includes a shell, a water tank is arranged on one side of the interior of the shell, an air inlet pipe is fixedly connected to the water tank, the air inlet pipe is connected to the connecting pipe, a plurality of air outlet nozzles are fixedly connected to the bottom of the air inlet pipe, a filter is also fixedly connected to the interior of the water tank, and the plurality of air outlet nozzles are fixedly mounted on the filter. By arranging the impurity removal device, when in use, the connecting pipe conveys waste gas generated during the preparation of silicon tetroxide into the air inlet pipe, and the waste gas is discharged from the air outlet nozzle. Impurities in the waste gas can be filtered by filtrate provided in the interior of the water tank, and some of the impurities filtered out are retained under the filter under the obstruction of the filter, so as to be convenient for rapid discharge when discharged from the drain outlet. The use effect is good, and the filtration efficiency is high compared with the spraying method.

[0009] A filter plate is also provided inside the impurity removal device, and filter cotton is also provided at the internal interlayer of the filter plate. The filter plate and filter cotton can perform a second filtration on the exhaust gas after the first filtration, thereby improving the filtering effect of the device. The two filtrations can fully filter out impurities in the exhaust gas, further improving the use effect of the device and enhancing the practicability of the device.

[0010] Preferably, a water tank installation opening is provided on one side of the shell, and the water tank is installed into the shell through the water tank installation opening. A mounting cover is also provided on one side of the shell, and the mounting cover is snap-connected to one side of the shell.

[0011] Preferably, a water inlet is provided on one side of the top of the water tank, a drain is provided on one side of the bottom of the water tank, and valves are provided on both the water inlet and the drain.

[0012] Preferably, a mounting hole for mounting an air outlet nozzle is provided on the filter screen, and an output end of the air outlet nozzle is located below the filter screen.

[0013] Preferably, the air outlet nozzle is provided with a one-way valve.

[0014] Preferably, the mounting cover is provided with mounting openings for an air inlet pipe, a water inlet and a drain outlet.

[0015] Preferably, filtered liquid is provided inside the water tank.

[0016] Beneficial effects:

[0017] Compared with the prior art, the tail gas circulation device for removing light impurities has the following beneficial effects:

[0018] 1. The utility model is provided with an impurity removal device. When in use, the connecting pipe conveys the waste gas generated during the preparation of silicon tetroxide into the air inlet pipe, and the waste gas is discharged from the air outlet. The impurities in the waste gas can be filtered by the filter liquid arranged inside the water tank. Some of the impurities filtered out are retained under the filter screen under the obstruction of the filter screen, which is convenient for rapid discharge when discharged from the drain outlet. The use effect is good, and the filtration efficiency is high compared with the spraying method.

[0019] 2. The utility model can perform a second filtration on the exhaust gas after the first filtration by setting a filter plate and filter cotton, thereby improving the filtering effect of the device. The two filtrations can fully filter out impurities in the exhaust gas, further improving the use effect of the device and enhancing the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of the utility model.

[0023] In the figure:

[0024] 1. Connecting pipe; 2. De-impurity device; 3. Circulation return pipe; 201. Shell; 2011. Water tank installation port; 2012. Installation cover; 202. Water tank; 2021. Water inlet; 2022. Drain port; 203. Air inlet pipe; 204. Air outlet nozzle; 2041. One-way valve; 205. Filter screen; 2051. Installation hole; 206. Filter plate; 207. Filter cotton. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1 to Figure 3 As shown, the utility model provides a technical solution: a light impurity removal tail gas circulation device, comprising a connecting pipe 1, one end of the connecting pipe 1 is connected to an impurity removal device 2, and one end of the impurity removal device 2 away from the connecting pipe 1 is fixedly connected to a circulation reflux pipe 3;

[0027] The impurity removal device 2 of the device includes a shell 201, a water tank 202 is arranged on one side of the interior of the shell 201, a filtrate is arranged inside the water tank 202, and the filtrate is an alkaline absorption liquid. The water tank 202 is fixedly connected with an air inlet pipe 203, and the air inlet pipe 203 is connected to the connecting pipe 1. A plurality of air outlet nozzles 204 are fixedly connected to the bottom of the air inlet pipe 203, and the air outlet nozzles 204 are provided with a one-way valve 2041. The interior of the water tank 202 is also fixedly connected with a filter screen 205, and the plurality of air outlet nozzles 204 are fixedly installed on the filter screen 205. The connecting pipe 1 transports the waste gas generated during the preparation of silicon tetroxide into the air inlet pipe 203, and the waste gas is discharged from the air outlet nozzle 204. The impurities in the waste gas can be filtered by the filtrate arranged inside the water tank 202, and some of the impurities filtered out are retained under the filter screen 205 under the obstruction of the filter screen 205, so as to facilitate the rapid discharge of the drain outlet 2022 when discharging, and the use effect is good.

[0028] In addition, a filter plate 206 is also provided inside the impurity removal device 2 of the device, and a filter cotton 207 is also provided at the internal interlayer of the filter plate 206. By providing the filter plate 206 and the filter cotton 207, the exhaust gas after the first filtration can be filtered for a second time, thereby improving the filtering effect of the device. The two filtrations can fully filter out impurities in the exhaust gas, further improving the use effect of the device and enhancing the practicability of the device.

[0029] Please pay attention to Figure 1 and Figure 2 A water tank installation port 2011 is provided on one side of the shell 201, and the water tank 202 is installed into the shell 201 through the water tank installation port 2011. A mounting cover 2012 is also provided on one side of the shell 201. The mounting cover 2012 is provided with a mounting port 2013 for the air inlet pipe 203, the water inlet 2021 and the drain port 2022. The mounting cover 2012 is installed on one side of the shell 201.

[0030] Please pay attention to Figure 2 and Figure 3 A water inlet 2021 is provided on one side of the top of the water tank 202, and a drain outlet 2022 is provided on one side of the bottom of the water tank 202. Valves are provided on both the water inlet 2021 and the drain outlet 2022.

[0031] Please pay attention to Figure 3 The filter screen 205 is provided with a mounting hole 2051 for mounting the air outlet nozzle 204 , and the output end of the air outlet nozzle 204 is located below the filter screen 205 .

[0032] Working principle: the connecting pipe 1 conveys the waste gas generated during the preparation of silicon tetroxide to the air inlet pipe 203, and the waste gas is discharged from the air outlet nozzle 204. The filter liquid is arranged inside the water tank 202 to filter the impurities in the waste gas, and some of the impurities filtered out are retained under the filter screen 205 under the obstruction of the filter screen 205, so as to facilitate the rapid discharge when the drain outlet 2022 is discharged. The filter plate 206 and the filter cotton 207 are arranged to filter the waste gas after the first filtration for a second time, and the two filtrations can fully filter out the impurities in the waste 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 light impurity removal tail gas circulation device, comprising a connecting pipe (1), characterized in that: One end of the connecting pipe (1) is connected to a de-impurity device (2), and one end of the de-impurity device (2) away from the connecting pipe (1) is fixedly connected to a circulation reflux pipe (3); The impurity removal device (2) comprises a shell (201), a water tank (202) is arranged on one side of the interior of the shell (201), the water tank (202) is fixedly connected to an air inlet pipe (203), the air inlet pipe (203) is connected to the connecting pipe (1), a plurality of air outlet nozzles (204) are fixedly connected to the bottom of the air inlet pipe (203), a filter screen (205) is also fixedly connected to the interior of the water tank (202), and the plurality of air outlet nozzles (204) are fixedly installed above the filter screen (205); A filter plate (206) is also provided inside the impurity removal device (2), and filter cotton (207) is also provided at the inner interlayer of the filter plate (206).

2. The tail gas circulation device for removing light impurities according to claim 1 is characterized in that: A water tank installation opening (2011) is provided on one side of the shell (201), and the water tank (202) is installed into the shell (201) through the water tank installation opening (2011). A mounting cover (2012) is also provided on one side of the shell (201), and the mounting cover (2012) is snap-connected to one side of the shell (201).

3. The tail gas circulation device for removing light impurities according to claim 1 is characterized in that: A water inlet (2021) is provided on one side of the top of the water tank (202), a water outlet (2022) is provided on one side of the bottom of the water tank (202), and valves are provided on both the water inlet (2021) and the water outlet (2022).

4. The tail gas circulation device for removing light impurities according to claim 1 is characterized in that: The filter screen (205) is provided with a mounting hole (2051) for mounting an air outlet nozzle (204), and the output end of the air outlet nozzle (204) is located below the filter screen (205).

5. The tail gas circulation device for removing light impurities according to claim 1 is characterized in that: The air outlet nozzle (204) is provided with a one-way valve (2041).

6. The tail gas circulation device for removing light impurities according to claim 2 is characterized in that: The installation cover (2012) is provided with installation openings (2013) for an air inlet pipe (203), a water inlet (2021) and a water outlet (2022).

7. The tail gas circulation device for removing light impurities according to claim 1 is characterized in that: Filtered liquid is arranged inside the water tank (202).

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