A stirrer for trichlorosilane production

Abstract

The utility model belongs to the technical field of industrial silicon production, especially is a kind of stirrer for trichlorosilane production. Including jar body, the top of jar body is equipped with feed inlet, and first pneumatic butterfly valve is installed at feed inlet, the top of jar body is installed with pneumatic cylinder, and motor support is installed on the output end of pneumatic cylinder, motor support is installed with speed reducer motor, the top of jar body is installed with radio frequency admittance switch, and jar body is installed with stirring paddle, and the shaft rod part of stirring paddle is connected with the output shaft end of speed reducer motor. The utility model drives stirring paddle to mix the material in jar by speed reducer motor, detects the height of bubble and makes feedback by radio frequency admittance switch in the process of stirring, adjusts the position of defoaming dispersion disc on stirring paddle by controlling the lifting stroke of pneumatic cylinder, makes it close to liquid surface, and strong shear force generated by rotation breaks bubble quickly, to improve production efficiency, ensure product quality.

Description

Technical Field

[0001] This utility model relates to the field of industrial silicon production technology, specifically to a stirrer for the production of trichlorosilane. Background Technology

[0002] Trichlorosilane, also known as silicochloroform, is an important organosilicon compound widely used in pharmaceuticals, pesticides, dyes, dye intermediates, and other chemical industries. Its reduction process is one of the crucial procedures in the preparation of organosilicon compounds. The following are the operating procedures for the trichlorosilane reduction process:

[0003] Prepare raw materials such as trichlorosilane, reducing agent (e.g., metallic sodium), and solvent (e.g., xylene). According to the formula ratio, gradually add trichlorosilane, reducing agent, and solvent to the reactor and stir thoroughly. Control the temperature within a suitable range, generally between 120-150℃, to ensure that the reaction proceeds fully. After the reaction is completed, separate the organic phase and aqueous phase in the reaction solution through appropriate operations, extract and wash the organic phase, and dry the purified organic phase to obtain the target product. At the same time, recover useful components such as solvents.

[0004] When metallic sodium and trichlorosilane are mixed and stirred in a solvent (such as xylene), a violent reduction reaction occurs. One possible reaction pathway is that sodium reduces Si-Cl bonds or attacks Si-H bonds to generate hydrogen gas. The generation of hydrogen gas bubbles will form foam, which may reduce the effective volume of the reactor, make stirring difficult or reduce efficiency, and cause material entrainment loss.

[0005] Therefore, we propose a stirrer for the production of trichlorosilane to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a stirrer for the production of trichlorosilane, which solves the problems mentioned in the background section.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0010] A stirrer for the production of trichlorosilane includes a tank body. The top of the tank body has a feed inlet with a first pneumatic butterfly valve installed at the feed inlet. A cylinder is installed on the top of the tank body, and a motor support is installed on the output end of the cylinder. A geared motor is installed on the motor support. An RF admittance switch is installed on the top of the tank body. An agitator is installed inside the tank body. The shaft of the agitator is connected to the output shaft of the geared motor, and a defoaming and dispersing disc is installed on the upper part of the shaft of the agitator. A water jacket is provided on the outside of the tank body. The bottom of the tank body has a discharge port with a second pneumatic butterfly valve installed at the discharge port.

[0011] Furthermore, a thermometer and a pressure gauge are installed on the top of the tank, and the sensing ends of the thermometer and pressure gauge extend into the interior of the tank.

[0012] Furthermore, the top of the tank is equipped with an observation mirror, and a pressure relief valve is installed on the top of the tank.

[0013] Furthermore, the top of the tank is provided with an interface, and the shaft of the agitator extends outward from the interface.

[0014] Furthermore, the interface is filled with sealing filler, and the sealing filler is located between the interface and the shaft of the agitator.

[0015] Furthermore, the outer wall of the water jacket is provided with lugs, and the lugs are located around it.

[0016] Furthermore, the upper part of the water jacket is provided with a water inlet, and a first valve is installed at the water inlet.

[0017] Furthermore, the lower part of the water jacket is provided with a water outlet, and a second valve is installed at the water outlet.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, this utility model provides a stirrer for the production of trichlorosilane, which has the following beneficial effects:

[0020] This invention uses a geared motor to drive a stirring paddle to mix materials in a tank. During the mixing process, the height of bubbles is detected by an RF admittance switch and feedback is provided. By controlling the lifting stroke of the cylinder, the position of the defoaming and dispersing disc on the stirring paddle is adjusted so that it is close to the liquid surface. The strong shearing force generated by the rotation quickly breaks up the bubbles, thereby improving production efficiency and ensuring product quality. Attached Figure Description

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

[0022] Figure 2 This is a side sectional view of the present invention;

[0023] Figure 3 This is a partial top view of the present invention.

[0024] In the diagram: 1. Tank body; 2. Inlet; 3. First pneumatic butterfly valve; 4. Cylinder; 5. Motor support; 6. Gear motor; 7. RF admittance switch; 8. Agitator; 9. Defoaming and dispersing disc; 10. Water jacket; 11. Outlet; 12. Second pneumatic butterfly valve; 13. Thermometer; 14. Pressure gauge; 15. Sight glass; 16. Pressure relief valve; 17. Interface; 18. Sealing packing; 19. Lug; 20. Water inlet; 21. First valve; 22. Water outlet; 23. Second valve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] like Figures 1-3 As shown in the figure, an embodiment of the present invention discloses a stirrer for the production of trichlorosilane, comprising a tank 1, a feed inlet 2 at the top of the tank 1, a first pneumatic butterfly valve 3 installed at the feed inlet 2, a cylinder 4 installed at the top of the tank 1, a motor support 5 installed at the output end of the cylinder 4, a geared motor 6 installed on the motor support 5, an RF admittance switch 7 installed at the top of the tank 1, and a stirring paddle 8 installed inside the tank 1. The shaft of the stirring paddle 8 is connected to the output shaft of the geared motor 6, and a [missing information - likely a device or component] is installed on the upper part of the shaft of the stirring paddle 8. The defoaming and dispersing disc 9 is driven by the geared motor 6 to mix the materials in the tank with the stirring paddle 8. During the mixing process, the height of the bubbles is detected by the radio frequency admittance switch 7 and feedback is given. By controlling the lifting stroke of the cylinder 4, the position of the defoaming and dispersing disc 9 on the stirring paddle 8 is adjusted so that it is close to the liquid surface. The strong shearing force generated by the rotation quickly breaks the bubbles, thereby improving production efficiency and ensuring product quality. The tank body 1 is provided with a water jacket 10 on the outside and a discharge port 11 is provided at the bottom of the tank body 1. A second pneumatic butterfly valve 12 is installed at the discharge port 11.

[0028] like Figure 1As shown, in some embodiments, a thermometer 13 and a pressure gauge 14 are installed on the top of the tank 1, and the detection ends of the thermometer 13 and the pressure gauge 14 extend into the interior of the tank 1. The thermometer 13 and the pressure gauge 14 are used to detect the temperature and pressure changes inside the tank, respectively.

[0029] like Figure 1 As shown, in some embodiments, the top of the tank 1 is provided with an observation mirror 15, and the top of the tank 1 is equipped with a pressure relief valve 16. The observation mirror 15 allows the operator to observe the process and status of the reaction in real time, so as to grasp the situation of the reaction process in a timely manner. The pressure relief valve 16 is mainly used to control the pressure inside the tank. When the pressure exceeds the set value, it will automatically open to relieve pressure, which can effectively prevent explosion accidents and protect internal equipment. The pressure relief valve 16 is preferably connected to an external exhaust gas collection system to prevent the internal mixed gas from leaking out.

[0030] like Figure 2 As shown, in some embodiments, the top of the tank 1 is provided with an interface 17, and the shaft of the stirring paddle 8 extends outward from the interface 17. The interface 17 is for the convenience of installing and fixing the stirring paddle 8.

[0031] like Figure 2 As shown, in some embodiments, the interface 17 is filled with sealing packing 18, and the sealing packing 18 is located between the interface 17 and the shaft of the agitator 8. The sealing packing 18 is a type of seal widely used in moving equipment, which can effectively prevent liquid, gas or solid particles from leaking out from the interface 17, thereby achieving a sealing effect.

[0032] like Figure 1 As shown, in some embodiments, the outer wall of the water jacket 10 is provided with ear seats 19, and the ear seats 19 are located around it. The main function of the ear seats 19 is to ensure the stability and safety of the agitator during operation. It can withstand various forces and vibrations generated by the agitator and prevent the agitator from shifting or being damaged.

[0033] like Figure 1 As shown, in some embodiments, the upper part of the water jacket 10 is provided with a water inlet 20, and a first valve 21 is installed at the water inlet 20. In order to ensure the stability of materials and the reliability of product quality during the production process, the water jacket 10 is used to inject heat preservation medium (hot water, hot oil, etc.) to maintain the temperature stability of the equipment for a certain period of time. The heat preservation medium (hot water, hot oil, etc.) is introduced from the water inlet 20.

[0034] like Figure 1 As shown, in some embodiments, the lower part of the water jacket 10 is provided with a water outlet 22, and a second valve 23 is installed at the water outlet 22, through which the heat preservation medium (hot water, hot oil, etc.) is drawn out.

[0035] When in use, this agitator needs to be used with a PLC controller to automate the operation of the electrical components through programmed control. The agitator is driven by a geared motor 6 to mix the materials in the tank. During the mixing process, the height of the bubbles is detected and fed back by an RF admittance switch 7 (model Vega FTW43, the principle is that the probe forms a capacitance with the tank wall, and the different dielectric constants of foam and liquid cause the capacitance to change. The RF admittance is measured to distinguish between foam and liquid, or to detect the foam interface). The position of the defoaming and dispersing disk 9 on the agitator 8 is adjusted by controlling the lifting stroke of the cylinder 4 (the liquid level before mixing should ideally be consistent with the initial position of the defoaming and dispersing disk 9 to avoid excessive adjustment of the dispersing disk position), so that it is close to the liquid surface. The strong shearing force generated by the rotation quickly breaks up the bubbles, thereby improving production efficiency and ensuring product quality.

[0036] In summary, the material in the tank is mixed by the agitator 8 driven by the geared motor 6. During the mixing process, the height of the bubbles is detected by the radio frequency admittance switch 7 and feedback is provided. By controlling the lifting stroke of the cylinder 4, the position of the defoaming and dispersing disk 9 on the agitator 8 is adjusted so that it is close to the liquid surface. The strong shearing force generated by the rotation quickly breaks up the bubbles, thereby improving production efficiency and ensuring product quality.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stirrer for the production of trichlorosilane, comprising a tank (1), characterized in that: The tank (1) has a feed inlet (2) at the top and a first pneumatic butterfly valve (3) at the feed inlet (2). The tank (1) has a cylinder (4) at the top and a motor support (5) at the output end of the cylinder (4). A geared motor (6) is installed on the motor support (5). The tank (1) has an RF admittance switch (7) at the top and a stirring paddle (8) inside. The shaft of the stirring paddle (8) is connected to the output shaft of the geared motor (6). A defoaming and dispersing disc (9) is installed on the upper part of the shaft of the stirring paddle (8). The tank (1) has a water jacket (10) on the outside. The tank (1) has a discharge port (11) at the bottom and a second pneumatic butterfly valve (12) at the discharge port (11).

2. The stirrer for trichlorosilane production according to claim 1, characterized in that: A thermometer (13) and a pressure gauge (14) are installed on the top of the tank (1), and the detection ends of the thermometer (13) and the pressure gauge (14) extend into the interior of the tank (1).

3. The stirrer for trichlorosilane production according to claim 1, characterized in that: The top of the tank (1) is provided with an observation mirror (15), and the top of the tank (1) is equipped with a pressure relief valve (16).

4. The stirrer for trichlorosilane production according to claim 1, characterized in that: The top of the tank (1) is provided with an interface (17), and the shaft of the stirring paddle (8) extends outward from the interface (17).

5. The stirrer for trichlorosilane production according to claim 4, characterized in that: The interface (17) is filled with sealing filler (18), and the sealing filler (18) is located between the interface (17) and the shaft of the agitator (8).

6. The stirrer for trichlorosilane production according to claim 1, characterized in that: The outer wall of the water jacket (10) is provided with ear seats (19), and the ear seats (19) are located around it.

7. The stirrer for trichlorosilane production according to claim 1, characterized in that: The upper part of the water jacket (10) is provided with a water inlet (20), and a first valve (21) is installed at the water inlet (20).

8. The stirrer for trichlorosilane production according to claim 1, characterized in that: The lower part of the water jacket (10) is provided with a water outlet (22), and a second valve (23) is installed at the water outlet (22).

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