Tetraethyl orthosilicate high-boiling filtering device

Abstract

The utility model discloses a high-boiling tetraethoxysilane filtering device which comprises a plate-and-frame filter, a filtering discharge pipe is arranged at the lower part of the plate-and-frame filter, the filtering discharge pipe is connected with a stirring tank through a circulating pipeline, a stirrer is arranged in the stirring tank, the top end of the stirrer is connected with a machine seal, and the bottom of the stirring tank is connected with a discharge pipe. The discharging pipe is connected with a circulating pump, the circulating pump is connected with a plate-and-frame filter, and the plate-and-frame filter is connected with a nitrogen purging pipeline. Compared with the prior art, a traditional filter bag filter is improved into the plate-and-frame filter, materials can be fully circulated in the plate-and-frame filter press and the stirring tank, impurities can be fully enriched between the plate-and-frame filter cloth, and products can be completely filtered and recycled. And in the impurity collecting stage, discharging is carried out only after nitrogen purging is completed, an operator collects and treats solid impurities, and certain promotion is achieved for environment protection and the field working environment.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a high-boiling ethyl orthosilicate filtering device. Background Art

[0002] The high boiling point of ethyl orthosilicate is the material produced by the distillation of ethyl silicate SI28, which contains substances such as SI28, SI32 and SI40, and has a certain recycling value. Generally, the high boiling point of ethyl orthosilicate is recovered after negative pressure distillation in a high boiling stirring tank, and some products are recovered. The distilled materials will be treated as waste. Although some SI28 products are also recovered, the product recovery is not maximized. Some companies use filter bags or filter element type filters to filter products. Traditional filter bags are small and cannot hold too much material, resulting in poor product filtration effect. The filter may be cleaned many times during the filtration process, which is extremely inconvenient for production. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a high-boiling filtration device for ethyl orthosilicate. The material can be fully circulated in the plate-frame filter press and the stirring tank, so that the impurities can be fully enriched between the plate-frame filter cloth, and the filtration situation can be observed through the discharge sight glass to prevent the product impurities from being mixed in the clear liquid, so that the product can be completely filtered and recovered. In the impurity collection stage, it is only necessary to discharge the material after nitrogen purging, and the operating staff can collect and process the solid impurities, which has a certain promoting effect on environmental protection and on-site working environment.

[0004] To achieve this technical purpose, the utility model adopts the following scheme:

[0005] A high-boiling filtration device for ethyl orthosilicate comprises a plate-frame filter, a filter discharge pipe is arranged at the bottom of the plate-frame filter, the filter discharge pipe is connected to a stirring tank through a circulation pipeline, a stirrer is arranged in the stirring tank, an organic seal is connected to the top of the stirrer, a discharge pipe is connected to the bottom of the stirring tank, the discharge pipe is connected to a circulation pump, the circulation pump is connected to the plate-frame filter, and the plate-frame filter is connected to a nitrogen purge pipeline.

[0006] Compared with the prior art, the beneficial effects of the present invention are:

[0007] The utility model improves the traditional filter bag filter into a plate-and-frame filter. The material can be fully circulated in the plate-and-frame filter press and the mixing tank, so that the impurities can be fully enriched between the plate-and-frame filter cloths, and the filtration situation can be observed through the discharge sight glass to prevent the product impurities from being mixed in the clear liquid, so that the product can be completely filtered and recovered. In the impurity collection stage, it is only necessary to discharge the material after the nitrogen purge is completed, and the operating staff can collect and process the solid impurities, which has a certain promoting effect on environmental protection and on-site working environment.

[0008] Furthermore, a jacket is provided on the outside of the mixing tank, one end of which is connected to the circulating water return pipeline and the steam pipeline, and the other end of the jacket is connected to the circulating water inlet pipeline and the steam condensate pipeline. The traditional design concept of circulating water entering from below and exiting from above and steam entering from above and exiting from below is maintained, and the laws of fluid mechanics and thermodynamics are followed, ensuring that the mixing tank can be stably heated and cooled. The two share a pipeline, fully utilizing the jacket, realizing resource sharing and saving equipment costs.

[0009] Furthermore, the mixing tank is provided with a temperature sensor, and the steam pipeline is provided with a flow regulating valve, which is interlocked with the temperature sensor. The temperature sensor of the mixing tank can detect the temperature of the material in the mixing tank in real time, and the operator can use the temperature as the operating point and determine the corresponding operation at each temperature point. The flow regulating valve on the steam pipeline can serve as a safety guarantee for employees at work. If the temperature is too high and the employees fail to find it in time, after reaching the interlocking point, the flow regulating valve will automatically close completely to avoid the occurrence of safety accidents.

[0010] Furthermore, a condensate check valve is provided on the steam condensate pipeline to effectively prevent the steam condensate from flowing back and avoid affecting the normal use of steam and equipment due to the condensate backflow.

[0011] Furthermore, the mixing tank is provided with a feeding port, a liquid level gauge and a pressure sensor, which are mainly in a shared relationship. After the material is fed through the feeding port, the actual height of the material in the equipment is detected by the liquid level gauge. The pressure will also rise during the feeding process. At this time, the pressure sensor can also monitor whether the liquid level gauge is accurate, and the pressure gauge will also detect the pressure environment of the mixing tank in real time according to the working conditions.

[0012] Furthermore, a discharge sight glass is provided on the filter discharge pipe for observing the filtering situation. Whether the filtering and decolorization of the material is completed can be judged according to the color of the material in the sight glass, thereby avoiding repeating the feeding and filtering process after discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a high-boiling filtration device for ethyl orthosilicate according to an embodiment of the utility model;

[0014] The markings in the figure are: 1. mixing tank; 2. agitator; 3. mechanical seal; 4. jacket; 51. circulating water inlet pipeline; 52. circulating water return pipeline; 61. steam pipeline; 62. steam condensate pipeline; 7. discharge pipe; 8. circulating pump; 9. plate and frame filter; 10. nitrogen purge pipeline; 11. filter discharge pipe; 12. discharge sight glass; 13. circulating pipeline; 14. feeding port. DETAILED DESCRIPTION

[0015] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0016] See also Figure 1 The utility model provides a high-boiling filtration device for ethyl orthosilicate, comprising a plate-frame filter 9, which is connected to a stirring tank 1 through a pipeline, and the stirring tank 1 is provided with a feed port 14, a liquid level meter, a temperature sensor and a pressure sensor; a stirrer 2 is provided in the stirring tank 1, and an organic seal 3 is connected to the top of the stirrer 2; a jacket 4 is provided outside the stirring tank 1, one end of the jacket 4 is connected to a circulating water return pipeline 52 and a steam pipeline 61, and the other end of the jacket 4 is connected to a circulating water inlet pipeline 51 and a steam condensate pipeline 61. 62 is connected, a flow regulating valve is arranged on the steam pipeline 61, the flow regulating valve is interlocked with the temperature sensor, and a condensate check valve is arranged on the steam condensate pipeline 62; a discharge pipe 7 is connected to the bottom of the stirring tank 1, the discharge pipe 7 is connected to the circulation pump 8, the circulation pump 8 is connected to the plate and frame filter 9, a filter discharge pipe 11 is arranged at the lower part of the plate and frame filter 9, a discharge sight glass 12 is arranged on the filter discharge pipe 11, the filter discharge pipe 11 is connected to the stirring tank 1 through the circulation pipeline 13, and the plate and frame filter 9 is connected to the nitrogen purge pipeline 10.

[0017] The working process of the high-boiling filtration device of ethyl orthosilicate of the utility model is as follows:

[0018] After the high boiling ethyl orthosilicate enters the stirring tank 1, the valves of the steam pipeline 61 and the steam condensate pipeline 62 are opened to heat the stirring tank 1, and part of the material is recovered by distillation. The distillation degree is controlled according to the temperature to ensure that the high-boiling product belongs to the liquid phase material. After the distillation is completed, the valve of the steam pipeline 61 is closed, and the steam condensate is completely blown out by compressed air. The valves of the circulating water inlet pipeline 51 and the circulating water return pipeline 52 are opened, and the circulating water is used to cool the stirring tank 1 to below 80°C. Activated carbon is manually added into the stirring tank 1 through the feeding port 14 and stirred for 30 minutes. The plate and frame filter 9 enters the working state in advance, and then the bottom of the kettle is discharged. The circulation pump 8 is used to pump all the mixture of high-boiling materials and activated carbon into the plate and frame filter 9, and then the materials are refluxed into the stirring tank 1. The impurities in the activated carbon and high-boiling materials are retained between the filter plates through the pressure filtration effect of the plate and frame filter 9. The liquid phase material enters the storage tank after being discharged and will be used as the raw material of SI40. After 30 minutes of circulating filtration, the nitrogen purge pipeline 10 is opened, and the plate and frame filter 9 is purged with nitrogen to purge the impurities. After the plate and frame filter 9 stops working and is loosened, the impurities will form filter cakes between the plates and frames and fall into the tray. After the workers have collected the filter cakes, they can filter the next kettle.

[0019] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A high-boiling filtration device for ethyl orthosilicate, comprising a plate-and-frame filter (9), a filter discharge pipe (11) being arranged at the bottom of the plate-and-frame filter (9), the filter discharge pipe (11) being connected to a stirring tank (1) through a circulation pipeline (13), a stirrer (2) being arranged in the stirring tank (1), a top end of the stirrer (2) being connected to an organic seal (3), characterized in that: A discharge pipe (7) is connected to the bottom of the stirring tank (1), the discharge pipe (7) is connected to a circulation pump (8), the circulation pump (8) is connected to a plate and frame filter (9), and the plate and frame filter (9) is connected to a nitrogen purge pipeline (10).

2. A high boiling ethyl orthosilicate filtering device according to claim 1, characterized in that: A jacket (4) is provided outside the stirring tank (1); one end of the jacket (4) is connected to a circulating water return pipeline (52) and a steam pipeline (61); and the other end of the jacket (4) is connected to a circulating water inlet pipeline (51) and a steam condensate pipeline (62).

3. A high-boiling filtration device for ethyl orthosilicate according to claim 2, characterized in that: The mixing tank (1) is provided with a temperature sensor, and the steam pipeline (61) is provided with a flow regulating valve, which is interlocked with the temperature sensor.

4. A high-boiling filtration device for ethyl orthosilicate according to claim 2, characterized in that: The steam condensate pipeline (62) is provided with a condensate check valve.

5. A high-boiling filtration device for ethyl orthosilicate according to claim 1, characterized in that: The stirring tank (1) is provided with a feeding port (14), a liquid level meter and a pressure sensor.

6. A high-boiling filtration device for ethyl orthosilicate according to claim 1, characterized in that: A discharge sight glass (12) is provided on the filter discharge pipe (11).

Images