CN219290708U

CN219290708U - Chlorosilane tail gas treatment device

Info

Publication number: CN219290708U
Application number: CN202320085393.5U
Authority: CN
Inventors: 王绪生; 罗全安; 何寿林
Original assignee: Wuhan Xingui Technology Qianjiang Co ltd
Current assignee: Wuhan Xingui Technology Qianjiang Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-07-04
Anticipated expiration: 2033-01-30

Abstract

The utility model discloses a chlorosilane tail gas treatment device which comprises a large leaching pool, wherein a small leaching pool is arranged in the large leaching pool, a leaching tower is arranged in the small leaching pool, a tail gas inlet pipe is fixedly connected to the side surface of the leaching tower, and a spray header is arranged in the leaching tower; the input end of the circulating pump is communicated with the leaching vat, the output end of the circulating pump is fixedly connected with a liquid outlet pipe, the output end of the liquid outlet pipe is fixedly connected with a liquid supplementing pipe, and the liquid outlet pipe is communicated with the spray header; the device comprises a liquid seal tank, wherein an exhaust pipe is fixedly connected to the top end of the liquid seal tank, a mud pump is fixedly connected to the bottom of the liquid seal tank, and a filter press is fixedly connected to the output end of the mud pump. Through the device, the filter pressing can be carried out on the used leacheate, so that the cleanliness of the internal leacheate circulation is maintained, and the device can normally operate for a long time.

Description

Chlorosilane tail gas treatment device

Technical Field

The utility model relates to the technical field of tail gas treatment, in particular to a chlorosilane tail gas treatment device.

Background

The existing tail gas is mainly chlorsilane entrained by inert gas, sodium chloride and sodium silicate are generated by absorbing the tail gas by sodium hydroxide aqueous solution, and silicon dioxide generated by the hydrolysis of chlorsilane is also produced, the PH of the eluent is controlled to be 8-10, and the produced silicon dioxide suspended matter floats on the water surface and is fished out, so that the eluent is continuously used and is not discharged. The above processing method has the following problems:

1. the turbidity of the eluent is high after long-term sealing, the pipeline and the water pipe are easy to be blocked, and the overhaul frequency is high;

2. the wall of the leaching tower adsorbs silicon dioxide particles, so that the inner diameter of the tower is reduced, and the absorption efficiency is affected;

3. the spray head is easy to be blocked due to the high turbidity of the circulating water.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art, and provides a chlorosilane tail gas treatment device which can filter-press the recycled leacheate and keep the clarity of the internal leacheate, thereby reducing the content of silicon dioxide in the recycled leacheate and ensuring the normal operation of the device.

The utility model also provides a chlorosilane tail gas treatment device, which comprises the following components: the leaching device comprises a leaching big pool, wherein a leaching small pool is arranged in the leaching big pool, a leaching tower is arranged in the leaching small pool, a tail gas inlet pipe is fixedly connected to the side surface of the leaching tower, and a spray header is arranged in the leaching tower; the input end of the circulating pump is communicated with the leaching vat, the output end of the circulating pump is fixedly connected with a liquid outlet pipe, the output end of the liquid outlet pipe is fixedly connected with a liquid supplementing pipe, and the liquid outlet pipe is communicated with the spray header; the device comprises a liquid seal tank, wherein an exhaust pipe is fixedly connected to the top end of the liquid seal tank, a mud pump is fixedly connected to the bottom of the liquid seal tank, and a filter press is fixedly connected to the output end of the mud pump. Through the device, the filter pressing can be carried out on the used leacheate, so that the cleanliness of the internal leacheate circulation is maintained, and the device can normally operate for a long time.

According to the chlorosilane tail gas treatment device disclosed by the utility model, the top end of the liquid seal tank is fixedly connected with the liquid inlet hose, and one end, far away from the liquid seal tank, of the liquid inlet hose is communicated with the leaching vat. By the device, the full pressure can be formed inside the liquid seal tank, so that the eluent in the liquid seal tank enters the filter press.

According to the chlorosilane tail gas treatment device, the output ends of the circulating pump and the mud pump are respectively provided with a pressure gauge, and a filter cake collecting box is arranged below the filter press. Through above parts, can detect the normal operating of circulating pump and pump, and collect the residue of filter-pressing.

According to the chlorosilane tail gas treatment device provided by the utility model, the liquid outlet of the filter press is communicated with the leaching vat. Through the components, the filtrate obtained by filtering the filter press is returned to the circulating system again, so that waste is avoided.

According to the chlorosilane tail gas treatment device, valves are arranged in the liquid supplementing pipe, the liquid outlet pipe and the exhaust pipe. Through above parts, can control the direction of inside rivers, the use of easier control device.

According to the chlorosilane tail gas treatment device disclosed by the utility model, the input end of the mud pump is fixedly connected with the liquid return pipe, and the control valve is arranged in the liquid return pipe. Through the components, the pumped liquid can be circulated before the mud pump normally operates.

According to the chlorosilane tail gas treatment device, the interior of the large leaching pool and the interior of the small leaching pool are respectively provided with the leaching solution, and the liquid level of the leaching solution in the large leaching pool is lower than the top edge of the small leaching pool. Through the components, silicon dioxide is obtained by leaching in the leaching small pond and flows into the leaching large pond in the convenient process, and tail gas is cleaned conveniently.

According to the chlorosilane tail gas treatment device provided by the utility model, the top end of the leaching tower is provided with the blow-down pipe. Through the components, the tail gas after leaching reaction can be discharged.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described below with reference to the drawings and examples;

fig. 1 is a schematic diagram of the overall structure of the chlorosilane tail gas treatment apparatus of the present utility model.

Legend description:

1. leaching the big pool; 2. eluting the small pool; 3. a rinsing tower; 4. a tail gas inlet pipe; 5. a spray header; 6. a circulation pump; 7. a liquid outlet pipe; 8. a fluid supplementing pipe; 9. a liquid seal tank; 10. an exhaust pipe; 11. a mud pump; 12. a filter press; 13. a liquid inlet hose; 14. a pressure gauge; 15. and (5) discharging the air tube.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

Referring to fig. 1, an embodiment of the utility model provides a chlorosilane tail gas treatment apparatus, which includes: the leaching device comprises a leaching big pool 1, wherein a leaching small pool 2 is arranged in the leaching big pool 1, leaching solution is respectively arranged in the leaching big pool 1 and the leaching small pool 2, the leaching solution is sodium hydroxide solution, the tail gas of chlorosilane is treated, the liquid level of the leaching solution in the leaching big pool 1 is lower than the top edge of the leaching small pool 2, silicon dioxide generated by leaching is conveniently floated on the surface and flows into the leaching big pool through the upper edge, the liquid level in the leaching small pool 2 can be kept, a leaching tower 3 is arranged in the leaching small pool 2, the entering chlorosilane tail gas is leached, a tail gas inlet pipe 4 is fixedly connected to the side surface of the leaching tower 3, the chlorosilane is conveniently introduced into the leaching tower 3, a blow-down pipe 15 is arranged at the top end of the leaching tower 3, the chlorosilane tail gas after the reaction is conveniently discharged, and a spray head 5 is arranged in the leaching tower 3, and the liquid is sprayed;

the output end of the circulating pump 6 is provided with a pressure gauge 14, the normal working pressure of the circulating pump 6 is tested, the input end of the circulating pump 6 is communicated with the leaching vat 1, the output end of the circulating pump 6 is fixedly connected with a liquid outlet pipe 7, the output end of the liquid outlet pipe 7 is fixedly connected with a liquid supplementing pipe 8, a valve of a switch is arranged in the liquid supplementing pipe 8 to control the direction of water flow, the liquid outlet pipe 7 is communicated with the spray header 5 through a communicating pipe, a valve is also arranged in the communicating pipe to control the liquid leaching to supply liquid to the leaching header 5, the liquid outlet pipe 7, the liquid supplementing pipe 8 and the communicating pipe are connected through a three-way pipe, and the valves are arranged in the liquid supplementing pipe 8 and the liquid outlet pipe 7 to control the flow direction of the internal liquid leaching;

the liquid seal tank 9 forms the liquid seal effect, the top fixedly connected with blast pipe 10 of liquid seal tank 9 forms the liquid seal, make inside gaseous getting rid of, blast pipe 10 inside is provided with the valve, open and seal the blast pipe, the bottom fixedly connected with pump 11 of liquid seal tank 9, extract the inside material of liquid seal tank 11, make things convenient for follow-up filter-pressing work, pump 11's input fixedly connected with liquid return pipe, and liquid return pipe's inside is provided with control valve, control liquid seal tank 11 inside article is controlled, pump 11's output is provided with manometer 14, detect pump 11's operating pressure, pump 11's output fixedly connected with pressure filter 12, filter the leacheate of taking out, press the impurity, press filter it, filter 12's liquid outlet is linked together with drip washing vat 1, carry out the back to inside drip washing liquid to vat 1, filter cake collecting box is provided with to the below of pressure filter press 12, the top fixedly connected with drip washing tank 9's of liquid seal tank 13, it is carried out drip washing liquid hose 13 to the inside of drip washing tank 9, liquid seal tank 9 is kept away from liquid seal tank 1's one end and is kept away from liquid seal tank 1.

Working principle: when the leaching device is used, a valve in the liquid supplementing pipe 8 is closed, the leaching solution in the leaching large tank 1 is driven by the circulating pump 6 to be transmitted to the spray header 5 through the transmission pipe, the tail gas of the chlorosilane enters the leaching tower 3 through the tail gas inlet pipe 4, the leaching solution sprayed out by the spray header 5 reacts with the tail gas, the reacted spraying solution falls into the leaching small tank 2, then the solution in the leaching small tank 2 overflows and enters the leaching large tank 1, and the circulation of the reaction is completed;

during filtration, the valve inside the liquid supplementing pipe 8 and the valve inside the exhaust pipe 10 are opened, the leaching liquid inside the leaching vat 1 enters the liquid sealing tank 9 through the circulating pump 6, after the exhaust pipe 10 is discharged, the valve inside the exhaust pipe 10 is closed, after the liquid inlet hose 13 is discharged, the leaching vat 1 is inserted, the mud pump 11 is started, after the pressure at the outlet of the mud pump 11 reaches the standard, the valve inside the liquid returning pipe is closed, so that the liquid inside the leaching vat reaches the filter press 12, a filter cake obtained by filter pressing enters a filter cake box, and the filtered liquid flows back into the leaching vat 1.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A chlorosilane tail gas treatment apparatus, comprising:

the leaching device comprises a leaching large pond (1), wherein a leaching small pond (2) is arranged in the leaching large pond (1), a leaching tower (3) is arranged in the leaching small pond (2), a tail gas inlet pipe (4) is fixedly connected to the side surface of the leaching tower (3), and a spray header (5) is arranged in the leaching tower (3);

the device comprises a circulating pump (6), wherein the input end of the circulating pump (6) is communicated with a leaching vat (1), the output end of the circulating pump (6) is fixedly connected with a liquid outlet pipe (7), the output end of the liquid outlet pipe (7) is fixedly connected with a liquid supplementing pipe (8), and the liquid outlet pipe (7) is communicated with a spray header (5);

the device comprises a liquid seal tank (9), wherein the top end of the liquid seal tank (9) is fixedly connected with an exhaust pipe (10), the bottom of the liquid seal tank (9) is fixedly connected with a mud pump (11), and the output end of the mud pump (11) is fixedly connected with a filter press (12).

2. The chlorosilane tail gas treatment device according to claim 1, wherein a liquid inlet hose (13) is fixedly connected to the top end of the liquid seal tank (9), and one end, far away from the liquid seal tank (9), of the liquid inlet hose (13) is communicated with the leaching vat (1).

3. The chlorosilane tail gas treatment device according to claim 1, wherein the output ends of the circulating pump (6) and the mud pump (11) are respectively provided with a pressure gauge (14), and a filter cake collecting box is arranged below the filter press (12).

4. The chlorosilane tail gas treatment apparatus of claim 1, wherein the liquid outlet of the filter press (12) is communicated with the leaching vat (1).

5. The chlorosilane tail gas treatment apparatus of claim 1, wherein valves are arranged in the liquid supplementing pipe (8), the liquid outlet pipe (7) and the exhaust pipe (10).

6. The chlorosilane tail gas treatment apparatus of claim 1, wherein the input end of the mud pump (11) is fixedly connected with a liquid return pipe, and a control valve is arranged in the liquid return pipe.

7. The chlorosilane tail gas treatment device according to claim 1, wherein the interior of the large leaching tank (1) and the interior of the small leaching tank (2) are respectively provided with leaching liquid, and the liquid level of the leaching liquid in the large leaching tank (1) is lower than the top edge of the small leaching tank (2).

8. A chlorosilane tail gas treatment apparatus as claimed in claim 1 wherein the top end of the leaching tower (3) is provided with a blow-down pipe (15).