Chloromethyldimethylchlorosilane crude product purification equipment

Abstract

The utility model relates to the technical field of purification equipment, in particular to purification equipment for crude chloromethyldimethylchlorosilane, which improves the heating evaporation efficiency of the crude chloromethyldimethylchlorosilane entering an evaporation tank subsequently, improves the heat utilization rate and reduces the energy consumption. Comprising an evaporation tank and a first electric heater mounted at the bottom of the inner side wall of the evaporation tank; the discharge valve is arranged on the lower portion of the outer side wall of the collection box in a communicating mode, an exhaust port is formed in the upper portion of the outer side wall of the collection box, the bottom end of the heat exchange box is connected with the top end of the collection box, and the top end of the heat exchange box is communicated with the interior of the evaporation tank through the conveying device. The conveying device is used for conveying evaporated materials, a heat exchange device is arranged in the heat exchange box, the heat exchange device is used for heat exchange, the heat exchange box is communicated with the storage device, and the storage device is used for conveying collected chloromethyl dimethyl chlorosilane into the evaporation tank.

Description

Technical Field

[0001] The utility model relates to the technical field of purification equipment, in particular to a crude product purification equipment for chloromethyldimethylchlorosilane. Background Art

[0002] As an important organosilicon intermediate, chloromethyldimethylchlorosilane has wide applications in the fields of organic synthesis, medicine, pesticides, and materials science. However, the directly produced crude chloromethyldimethylchlorosilane often contains a certain amount of impurities, and the presence of these impurities will seriously affect the quality and application performance of the product. Therefore, it is necessary to purify and process the crude chloromethyldimethylchlorosilane.

[0003] Currently, in existing equipment, such as the patent with the authorization announcement number CN217854597U, this utility model discloses a purification device for methyltrichlorosilane, specifically related to the chemical industry field, including a box body. A controller is arranged on the front side of the box body, a heating plate is arranged on the inner cavity wall surface of the box body, an electric heating tube is arranged on the outer surface of the heating plate, a driving motor and an air extraction pump are arranged on the top of the box body, and the output end of the driving motor is connected with a rotating rod. This utility model first drives the stirring rod and the fixing plate to stir inside the box body by starting the driving motor.

[0004] However, it is found during the use of this device that this device is not convenient for heating the raw materials to be purified by using waste heat, reducing the heat utilization rate and the efficiency of raw material purification. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a crude product purification equipment for chloromethyldimethylchlorosilane, which can improve the heating and evaporation efficiency of the crude chloromethyldimethylchlorosilane entering the evaporation tank subsequently, improve the heat utilization rate, and reduce energy consumption.

[0006] A crude product purification device for chloromethyldimethylchlorosilane of the utility model comprises an evaporation tank and a first electric heater, and the first electric heater is installed at the bottom of the inner side wall of the evaporation tank; it further comprises a conveying device, a heat exchange device, a storage device, a collection box, a discharge valve, a heat exchange box and an inlet valve. The discharge valve is communicated and arranged at the lower part of the outer side wall of the collection box, and an exhaust port is arranged at the upper part of the outer side wall of the collection box. The bottom end of the heat exchange box is connected to the top end of the collection box, and the top end of the heat exchange box is communicated with the inside of the evaporation tank through the conveying device. The conveying device is used for conveying the evaporated materials. A heat exchange device is arranged inside the heat exchange box and is used for heat exchange. The heat exchange box is communicated with the storage device, and the storage device is used for conveying the collected chloromethyldimethylchlorosilane into the evaporation tank. The inlet valve is communicated and arranged on the outer side wall of the heat exchange box; the crude product of chloromethyldimethylchlorosilane to be purified is conveyed into the interior of the heat exchange box through the inlet valve, and then the chloromethyldimethylchlorosilane in the heat exchange box is conveyed into the interior of the evaporation tank through the storage device. The chloromethyldimethylchlorosilane is heated by the first electric heater, so that the chloromethyldimethylchlorosilane and the impurities therein are purified by using different evaporation temperatures. The evaporated chloromethyldimethylchlorosilane enters the heat exchange device through the conveying device, and the heat exchange device cools and reduces the temperature of the evaporated chloromethyldimethylchlorosilane by using the temperature of the crude product of chloromethyldimethylchlorosilane in the heat exchange box, so that the evaporated and purified chloromethyldimethylchlorosilane condenses and then flows into the interior of the collection box. At the same time, the heat exchange device preheats the crude product of chloromethyldimethylchlorosilane in the heat exchange box, thereby improving the heating and evaporation efficiency of the crude product of chloromethyldimethylchlorosilane entering the evaporation tank subsequently, improving the heat utilization rate and reducing the energy consumption of the device.

[0007] Preferably, the storage device comprises a first conveying pipe, a storage tank, a second electric heater, a second conveying pipe and a pump body. The input end of the first conveying pipe is communicated with the inside of the heat exchange box, the output end of the first conveying pipe is communicated with the storage tank, the second electric heater is communicated and arranged on the storage tank, the input end of the second conveying pipe is communicated with the storage tank, the output end of the second conveying pipe is communicated with the evaporation tank, and the pump body is communicated and arranged on the second conveying pipe; the preheated crude product of chloromethyldimethylchlorosilane in the heat exchange box is conveyed into the interior of the storage tank through the first conveying pipe for storage, and then the chloromethyldimethylchlorosilane entering the storage tank is continuously heated by the second electric heater, so that the crude product of chloromethyldimethylchlorosilane is heated to the temperature required for evaporation and extraction. Then, by starting the pump body, the pump body conveys the heated crude product of chloromethyldimethylchlorosilane into the evaporation tank through the second conveying pipe, so that the crude product of chloromethyldimethylchlorosilane entering the evaporation tank is directly evaporated and purified, reducing the heating time of the first electric heater for it and improving the purification efficiency of chloromethyldimethylchlorosilane.

[0008] Preferably, the heat exchange device includes a first conveying box, a second conveying box, heat exchange tubes, and a deflector. The first conveying box is installed at the bottom end of the inner side wall of the heat exchange box and is communicated with the collection box. The second conveying box is installed at the top end of the inner side wall of the heat exchange box and is communicated with the conveying device. The upper and lower ends of multiple groups of heat exchange tubes are respectively communicated with the first conveying box and the second conveying box. Multiple groups of deflectors are staggered and installed on the inner side wall of the heat exchange box. The crude chloromethyldimethylchlorosilane transported into the heat exchange box through the inlet valve cools down multiple groups of heat exchange tubes. The chloromethyldimethylchlorosilane heated and evaporated in the evaporation tank enters the inside of the second conveying box through the conveying device. The evaporated chloromethyldimethylchlorosilane is transported into multiple groups of heat exchange tubes through the second conveying box. The chloromethyldimethylchlorosilane stored inside condenses through the heat exchange of multiple groups of heat exchange tubes. At the same time, the heat exchange tubes preheat the crude chloromethyldimethylchlorosilane in the heat exchange box. The condensed chloromethyldimethylchlorosilane is transported into the collection box through the first conveying box. The stored chloromethyldimethylchlorosilane is discharged through the discharge valve. The crude chloromethyldimethylchlorosilane is guided and transported through multiple groups of deflectors, improving the heat exchange effect and the heat utilization effect.

[0009] Preferably, the conveying device includes a filter box, a filter screen, and a fan. The filter box is installed at the top of the heat exchange box. The bottom end of the filter box is communicated with the second conveying box. The filter screen is installed on the inner side wall of the filter box. The bottom end of the fan is communicated with the filter box, and the top end of the fan is communicated with the evaporation tank. The evaporated chloromethyldimethylchlorosilane in the evaporation tank is extracted by the fan, and the steam is transported into the inside of the second conveying box through the filter box. The steam is filtered by the filter screen, thereby reducing the entry of impurity particles into the inside of the second conveying box and improving the purification effect of chloromethyldimethylchlorosilane.

[0010] Preferably, it further includes a discharge box and an activated carbon layer. The input end of the discharge box is communicated with the exhaust port of the collection box. A discharge port is provided at the top of the discharge box. The activated carbon layer is arranged inside the discharge box. The excess gas in the collection box is transported into the inside of the discharge box and then discharged outdoors through the discharge port of the discharge box. The gas is adsorbed and filtered by the activated carbon layer, reducing the environmental pollution caused by the tail gas of chloromethyldimethylchlorosilane purification.

[0011] Preferably, it further includes a discharge pipe, and the discharge pipe is communicatively arranged at the discharge port of the discharge box. By providing the discharge pipe, the convenience of guiding and discharging the tail gas is improved.

[0012] Preferably, it further includes a liquid level sensor, and the liquid level sensor is communicatively arranged on the evaporation tank. By detecting the liquid level height in the evaporation tank through the liquid level sensor, the convenience of monitoring the liquid level of chloromethyldimethylchlorosilane in the evaporation tank is improved.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The crude product of chloromethyldimethylchlorosilane to be purified is transported into the heat exchange box through the inlet valve, and then the chloromethyldimethylchlorosilane in the heat exchange box is transported into the evaporation tank through the storage device. The chloromethyldimethylchlorosilane is heated by the first electric heater, so that the chloromethyldimethylchlorosilane and the impurities therein are purified by using different evaporation temperatures. The evaporated chloromethyldimethylchlorosilane enters the heat exchange device through the conveying device. The heat exchange device cools down the evaporated chloromethyldimethylchlorosilane by using the temperature of the crude product of chloromethyldimethylchlorosilane in the heat exchange box, so that the evaporated and purified chloromethyldimethylchlorosilane condenses and flows into the collection box. At the same time, the heat exchange device preheats the crude product of chloromethyldimethylchlorosilane in the heat exchange box, thereby improving the heating and evaporation efficiency of the crude product of chloromethyldimethylchlorosilane entering the evaporation tank subsequently, improving the heat utilization rate, and reducing the energy consumption of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an isometric structural schematic diagram of the present utility model;

[0015] Figure 2 is an isometric structural schematic diagram of the connection between the evaporation tank and the first electric heater, etc.;

[0016] Figure 3 is an isometric structural schematic diagram of the connection between the second conveying pipe and the pump body, etc.;

[0017] Figure 4 is an isometric structural schematic diagram of the connection between the storage tank and the second electric heater, etc.;

[0018] Figure 5 is a partial isometric structural schematic diagram of the connection between the heat exchange box and the guide plate, etc.

[0019] Reference numerals in the drawings: 1. Evaporation tank; 2. First electric heater; 3. Collection box; 4. Discharge valve; 5. Heat exchange box; 6. Inlet valve; 7. First conveying pipe; 8. Storage tank; 9. Second electric heater; 10. Second conveying pipe; 11. Pump body; 12. First conveying box; 13. Second conveying box; 14. Heat exchange pipe; 15. Filter box; 16. Filter screen; 17. Fan; 18. Discharge box; 19. Activated carbon layer; 20. Discharge pipe; 21. Liquid level sensor; 22. Guide plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0021] Embodiment 1

[0022] As Figures 1 to 5 shown, a purification device for crude chloromethyldimethylchlorosilane of the present utility model includes an evaporation tank 1 and a first electric heater 2, and the first electric heater 2 is installed at the bottom of the inner side wall of the evaporation tank 1; it further includes a conveying device, a heat exchange device, a storage device, a collection box 3, a discharge valve 4, a heat exchange box 5 and an inlet valve 6. The discharge valve 4 is communicatively provided at the lower part of the outer side wall of the collection box 3, and an exhaust port is provided at the upper part of the outer side wall of the collection box 3. The bottom end of the heat exchange box 5 is connected to the top end of the collection box 3, and the top end of the heat exchange box 5 is communicatively connected to the inside of the evaporation tank 1 through the conveying device. The conveying device is used to convey the evaporated material. A heat exchange device is provided inside the heat exchange box 5, and the heat exchange device is used for heat exchange. The heat exchange box 5 is communicatively connected to the storage device, and the storage device is used to convey the collected chloromethyldimethylchlorosilane into the evaporation tank 1. The inlet valve 6 is communicatively provided on the outer side wall of the heat exchange box 5;

[0023] As Figure 3 shown, the storage device includes a first conveying pipe 7, a storage tank 8, a second electric heater 9, a second conveying pipe 10 and a pump body 11. The input end of the first conveying pipe 7 is communicatively connected to the inside of the heat exchange box 5, the output end of the first conveying pipe 7 is communicatively connected to the storage tank 8, the second electric heater 9 is communicatively provided on the storage tank 8, the input end of the second conveying pipe 10 is communicatively connected to the storage tank 8, the output end of the second conveying pipe 10 is communicatively connected to the evaporation tank 1, and the pump body 11 is communicatively provided on the second conveying pipe 10;

[0024] In this embodiment, the crude chloromethyldimethylchlorosilane to be purified is conveyed into the heat exchange box 5 through the inlet valve 6, and then the chloromethyldimethylchlorosilane in the heat exchange box 5 is conveyed into the evaporation tank 1 through the storage device. The chloromethyldimethylchlorosilane is heated by the first electric heater 2 to purify the chloromethyldimethylchlorosilane and its impurities using different evaporation temperatures. The evaporated chloromethyldimethylchlorosilane enters the heat exchange device through the conveying device. The heat exchange device cools and reduces the temperature of the evaporated chloromethyldimethylchlorosilane using the temperature of the crude chloromethyldimethylchlorosilane in the heat exchange box 5, so that the evaporated and purified chloromethyldimethylchlorosilane condenses and flows into the collection box 3. At the same time, the heat exchange device preheats the crude chloromethyldimethylchlorosilane in the heat exchange box 5, thereby improving the heating and evaporation efficiency of the crude chloromethyldimethylchlorosilane subsequently entering the evaporation tank 1, improving the heat utilization rate, and reducing the energy consumption of the equipment.

[0025] Embodiment 2

[0026] On the basis of Embodiment 1, as Figure 5As shown in the figure, the heat exchange device includes a first conveying box 12, a second conveying box 13, heat exchange tubes 14, and a baffle plate 22. The first conveying box 12 is installed at the bottom end of the inner side wall of the heat exchange box 5. The first conveying box 12 communicates with the collection box 3. The second conveying box 13 is installed at the top end of the inner side wall of the heat exchange box 5. The second conveying box 13 is communicated with the conveying device. The upper and lower ends of multiple groups of heat exchange tubes 14 are respectively communicated with the first conveying box 12 and the second conveying box 13. Multiple groups of baffle plates 22 are staggered in position and installed on the inner side wall of the heat exchange box 5;

[0027] As Figure 5 shown in the figure, the conveying device includes a filter box 15, a filter screen 16, and a fan 17. The filter box 15 is installed at the top of the heat exchange box 5. The bottom end of the filter box 15 communicates with the second conveying box 13. The filter screen 16 is installed on the inner side wall of the filter box 15. The bottom end of the fan 17 communicates with the filter box 15. The top end of the fan 17 communicates with the evaporation tank 1;

[0028] As Figure 2 shown in the figure, it further includes a discharge box 18 and an activated carbon layer 19. The input end of the discharge box 18 communicates with the exhaust port of the collection box 3. A discharge port is provided at the top of the discharge box 18. The activated carbon layer 19 is arranged inside the discharge box 18;

[0029] As Figure 2 shown in the figure, it further includes a discharge pipe 20. The discharge pipe 20 is communicatively arranged at the discharge port of the discharge box 18;

[0030] As Figure 1 shown in the figure, it further includes a liquid level sensor 21. The liquid level sensor 21 is communicatively arranged on the evaporation tank 1;

[0031] In this embodiment, the crude chloromethyldimethylchlorosilane after preheating treatment in the heat exchange tank 5 is transported to the inside of the storage tank 8 through the first delivery pipe 7 for storage. Then, the second electric heater 9 is used to continue heating the chloromethyldimethylchlorosilane entering the storage tank 8, so that the crude chloromethyldimethylchlorosilane is heated to the temperature required for evaporation and extraction. After that, the pump body 11 is turned on, and the pump body 11 transports the heated crude chloromethyldimethylchlorosilane to the evaporation tank 1 through the second delivery pipe 10, so that the crude chloromethyldimethylchlorosilane entering the evaporation tank 1 is directly evaporated and purified, reducing the heating time of the first electric heater 2 and improving the purification efficiency of chloromethyldimethylchlorosilane. The crude chloromethyldimethylchlorosilane entering the heat exchange tank 5 through the inlet valve 6 cools down the multiple groups of heat exchange pipes 14. The chloromethyldimethylchlorosilane heated and evaporated in the evaporation tank 1 enters the inside of the second delivery box 13 through the delivery device. The second delivery box 13 transports the evaporated chloromethyldimethylchlorosilane into the multiple groups of heat exchange pipes 14. Through the heat exchange of the multiple groups of heat exchange pipes 14, the internally extracted chloromethyldimethylchlorosilane condenses. At the same time, the heat exchange pipes 14 preheat the crude chloromethyldimethylchlorosilane in the heat exchange tank 5. The condensed chloromethyldimethylchlorosilane is transported to the inside of the collection box 3 through the first delivery box 12, and the extracted chloromethyldimethylchlorosilane is discharged through the discharge valve 4. The crude chloromethyldimethylchlorosilane is guided and transported through the multiple groups of guide plates 22, improving the heat exchange effect and the heat utilization effect.

[0032] For a crude chloromethyldimethylchlorosilane purification device of the present utility model, during operation, the crude chloromethyldimethylchlorosilane to be purified is transported into the inside of the heat exchange tank 5 through the inlet valve 6. Then, the storage device transports the chloromethyldimethylchlorosilane in the heat exchange tank 5 into the inside of the evaporation tank 1. The first electric heater 2 is used to heat the chloromethyldimethylchlorosilane, so that the chloromethyldimethylchlorosilane and the impurities therein are purified by using different evaporation temperatures. The evaporated chloromethyldimethylchlorosilane enters the heat exchange device through the delivery device. The heat exchange device cools down the evaporated chloromethyldimethylchlorosilane by using the temperature of the crude chloromethyldimethylchlorosilane in the heat exchange tank 5, so that the evaporated and purified chloromethyldimethylchlorosilane condenses and then flows into the inside of the collection box 3. At the same time, the heat exchange device preheats the crude chloromethyldimethylchlorosilane in the heat exchange tank 5.

[0033] The first electric heater 2, the second electric heater 9, the pump body 11, the fan 17 and the liquid level sensor 21 of a crude chloromethyldimethylchlorosilane purification device of the present utility model are purchased on the market. Those skilled in the industry only need to install and operate according to the attached operation manuals, without the need for creative labor from those skilled in the art.

[0034] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A crude chloromethyldimethylsilyl chloride purification device, comprising an evaporation tank (1) and a first electric heater (2), wherein the first electric heater (2) is installed at the bottom of the inner wall of the evaporation tank (1); characterized in that: The invention also comprises a conveying device, a heat exchange device, a storage device, a collection box (3), a discharge valve (4), a heat exchange box (5) and an inlet valve (6); the discharge valve (4) is arranged in communication with the lower part of the outer wall of the collection box (3); an exhaust port is arranged in the upper part of the outer wall of the collection box (3); the bottom end of the heat exchange box (5) is connected to the top end of the collection box (3); the top end of the heat exchange box (5) is connected to the inside of the evaporation tank (1) through the conveying device; the conveying device is used to convey the evaporated material; a heat exchange device is arranged in the heat exchange box (5); the heat exchange device is used to perform heat exchange; the heat exchange box (5) is in communication with the storage device; the storage device is used to convey the collected chloromethyldimethylsilyl chloride to the evaporation tank (1); and the inlet valve (6) is arranged in communication with the outer wall of the heat exchange box (5).

2. A crude chloromethyldimethylsilyl chloride purification device as claimed in claim 1, characterized in that: The storage device comprises a first delivery pipe (7), a storage tank (8), a second electric heater (9), a second delivery pipe (10) and a pump body (11); the input end of the first delivery pipe (7) is connected to the inside of the heat exchange box (5); the output end of the first delivery pipe (7) is connected to the storage tank (8); the second electric heater (9) is connected and arranged on the storage tank (8); the input end of the second delivery pipe (10) is connected to the storage tank (8); the output end of the second delivery pipe (10) is connected to the evaporation tank (1); and the pump body (11) is connected and arranged on the second delivery pipe (10).

3. A crude chloromethyldimethylsilyl chloride purification device as claimed in claim 1, characterized in that: The heat exchange device comprises a first conveying box (12), a second conveying box (13), a heat exchange tube (14) and a guide plate (22); the first conveying box (12) is installed at the bottom end of the inner wall of the heat exchange box (5); the first conveying box (12) is communicated with the collecting box (3); the second conveying box (13) is installed at the top end of the inner wall of the heat exchange box (5); the second conveying box (13) is communicated with the conveying device; the upper and lower ends of the plurality of groups of heat exchange tubes (14) are respectively communicated with the first conveying box (12) and the second conveying box (13); and the plurality of groups of guide plates (22) are staggeredly installed on the inner wall of the heat exchange box (5).

4. A crude chloromethyldimethylsilyl chloride purification device as claimed in claim 1, characterized in that: The conveying device comprises a filter box (15), a filter screen (16) and a fan (17); the filter box (15) is mounted on the top of the heat exchange box (5); the bottom of the filter box (15) is connected to the second conveying box (13); the filter screen (16) is mounted on the inner wall of the filter box (15); the bottom of the fan (17) is connected to the filter box (15); and the top of the fan (17) is connected to the evaporation tank (1).

5. A crude chloromethyldimethylsilyl chloride purification device as claimed in claim 1, characterized in that: It also comprises a discharge box (18) and an activated carbon layer (19); the input end of the discharge box (18) is connected to the exhaust port of the collection box (3); the top of the discharge box (18) is provided with a discharge port; and the activated carbon layer (19) is arranged inside the discharge box (18).

6. A crude chloromethyldimethylsilyl chloride purification device as claimed in claim 5, characterized in that: It also includes a discharge pipe (20), which is arranged in communication with the discharge port of the discharge box (18).

7. A crude chloromethyldimethylsilyl chloride purification device as claimed in claim 1, characterized in that: It also comprises a liquid level sensor (21), which is arranged in communication with the evaporation tank (1).

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