Resin jet filling device

Abstract

The utility model discloses a resin jet filling device and belongs to the technical field of polycrystalline silicon. The resin jet filling device comprises a jet pipe, a feeding pipe is arranged in one end of the jet pipe, a flow guide wall is arranged on the outlet side of the feeding pipe and the inner wall of the jet pipe, a cooling pipe is arranged on the outer side of the jet pipe, and a discharging port is formed in the other end of the jet pipe. And a feeding side pipe is arranged on the outer side of the jet pipe close to the outlet of the feeding pipe, and is connected with a filling tank. According to the device, the contact reaction heat release process of resin and a liquid phase can be carried out before being moved to a fixed bed device, so that the safety controllability of operation is improved, the continuity of a subsequent filling process is greatly accelerated, efficient introduction is realized, and a solid foundation is laid for continuous and stable operation of an enterprise production line.

Description

Technical Field

[0001] The utility model belongs to the technical field of polysilicon, and particularly relates to a resin jet filling device. Background Art

[0002] Polysilicon is the most important and basic functional material for the semiconductor industry, electronic information industry, and solar photovoltaic cell industry. The production of polysilicon solar cells requires polysilicon materials, and the production of silicon single crystals for integrated circuits also requires polysilicon. According to different purity requirements, it is divided into electronic grade and solar grade. Among them, electronic grade polysilicon accounts for about 55%, and solar grade polysilicon accounts for 45%. With the rapid development of the photovoltaic industry, the growth rate of the demand for polysilicon in solar cells is higher than that of semiconductor polysilicon. At present, the demand for solar polysilicon has exceeded that of electronic grade polysilicon. And it will remain the mainstream material for solar cells for a considerable period of time in the future.

[0003] At present, a large amount of chlorosilane by-products are produced during the production of polysilicon. In most cases, resins are used for adsorption. However, due to the influence of the water content of the resin, a large amount of heat will be released during the contact between the resin and chlorosilane, resulting in the risk of swelling and flash explosion. The old-fashioned introduction and filling device has poor safety and timeliness and can no longer meet the current safety requirements of polysilicon production. Therefore, it is necessary to design a safe and efficient resin filling device. Utility Model Content

[0004] The utility model aims to solve the safety problem caused by the failure to timely discharge the heat generated by the contact between the resin and chlorosilane during the resin filling process, and provides a resin jet filling device.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] The present invention provides a resin jet filling device, comprising a jet tube, a feed pipe is arranged inside one end of the jet tube, a guide wall is arranged on the inner wall of the jet tube at the outlet side of the feed pipe, a cooling pipe is arranged outside the jet tube, and the other end of the jet tube is a discharge port;

[0007] A feed side pipe is arranged on the outer side of the jet pipe near the outlet of the feed pipe, and the feed side pipe is connected with the filling tank.

[0008] The diameter of the feed pipe from the inlet to the outlet first remains unchanged, and then gradually decreases, and the outlet diameter is reduced to 1 / 3 of the inlet diameter.

[0009] The guide wall gradually reduces the flow cross section in the jet tube to 1 / 3 of the circular cross section of the jet tube, and then gradually increases it to be the same as the circular cross section of the jet tube.

[0010] The diameter of the cooling tube is 1.5 to 2.5 times larger than the diameter of the jet tube.

[0011] A cooling medium inlet is arranged outside the cooling pipe at one end close to the discharge port, and a cooling medium outlet is arranged at one end away from the discharge port.

[0012] The cooling medium inlet is provided with a third temperature monitoring unit, and the cooling medium outlet is provided with a fourth temperature monitoring unit.

[0013] A cooling medium is filled between the fluid in the jet tube and the cooling tube, and the cooling medium includes one of water, frozen salt water, a mixed solution of water and ethylene glycol, a calcium chloride solution or a sodium chloride solution.

[0014] A nitrogen inlet and a resin inlet are arranged at the top of the filling tank, and a mixing outlet is arranged at the bottom of the filling tank. The mixing outlet is connected with a feed side pipe through a pipeline.

[0015] A first temperature monitoring unit and a first pressure monitoring unit are arranged at the bottom of the filling tank; a second flow monitoring unit, a check valve, a second temperature monitoring unit and a third pressure monitoring unit are arranged in sequence on the pipeline close to the feed side pipe.

[0016] The pipeline is connected to a nitrogen pipeline, and a second pressure monitoring unit and a first flow monitoring unit are arranged on the nitrogen pipeline.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The resin jet filling device provided by the utility model is intended to improve the safety and efficiency of the mixing and filling operations of resin and chlorosilane. The device can move the exothermic process of the contact reaction between the resin and chlorosilane to the front of the fixed bed device, improve the safety and controllability of the operation, and can greatly improve the filling efficiency of the resin. The device is provided with a filling tank, in which nitrogen dries the resin so that the moisture content of the resin meets the filling requirements and avoids safety hazards in the production process; the resin and chlorosilane are mixed in the jet tube, and the setting of the guide wall forms a negative pressure in the mixing process, which can accelerate the suction of the fluid and achieve the purpose of sufficient mixing in a relatively short time; a cooling pipe is set outside the jet tube, and a cooling medium is added, which can timely take away the heat generated in the mixing process, avoid the situation of shutdown due to excessive temperature during the production process, and also improve the safety and stability of production. The resin filling device provided by the utility model can improve the production efficiency of the enterprise, save energy and reduce consumption, and reduce the production energy consumption cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the resin jet filling device of the utility model;

[0021] In the figure: 1. jet tube; 2. feed pipe; 3. feed side pipe; 4. cooling pipe; 5. cooling medium inlet; 6. cooling medium outlet; 7. discharge port; 8. guide wall; 9. filling tank; 10. nitrogen inlet; 11. resin inlet; 12. mixing outlet; 13. pipeline; 14. first flange; 15. second flange; 16. third flange; 17. first temperature monitoring unit; 18. first pressure monitoring unit; 19. second pressure monitoring unit; 20. first flow monitoring unit; 21. third pressure monitoring unit; 22. second temperature monitoring unit; 23. check valve; 24. second flow monitoring unit; 25. third temperature monitoring unit; 26. fourth temperature monitoring unit; 27. fifth temperature monitoring unit. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The utility model is further described in detail below with reference to the accompanying drawings:

[0029] like Figure 1 As shown, a resin jet filling device comprises a jet tube 1, a feed tube 2 is arranged inside one end of the jet tube 1, the jet tube 1 and the feed tube 2 are integrally formed, a guide wall 8 is arranged on the inner wall of the jet tube 1 on the outlet side of the feed tube 2, a cooling tube 4 is arranged on the outer side of the jet tube 1, and the other end of the jet tube 1 is a discharge port 7; near the outlet of the feed tube 2, a feed side tube 3 is arranged on the outer side of the jet tube 1, and the feed side tube 3 is connected to the filling tank 9.

[0030] The device can move the exothermic process of the contact reaction between the resin and the chlorosilane to the front of the fixed bed device, and is provided with a feed pipe 2 and a feed side pipe 3. The materials enter from the feed pipe 2 and the feed side pipe 3 respectively, and begin to mix at the outlet of the feed pipe. The provided guide wall enables the two to be mixed quickly and evenly. A cooling pipe is provided outside the jet pipe, and a cooling medium is added, which can quickly take away the heat generated during the material mixing process, avoid shutdown due to excessive temperature during the production process, ensure the continuity of the mixing operation, and improve the safety and stability of production.

[0031] Furthermore, the diameter of the feed pipe 2 from the inlet to the outlet first remains unchanged and then gradually decreases, and the outlet diameter is reduced to 1 / 3 of the inlet diameter. The design of the feed pipe 2 can control the amount of chlorosilane liquid entering and control the mixing speed with the resin-containing and nitrogen liquid.

[0032] Furthermore, the guide wall 8 gradually reduces the flow cross-section in the jet tube 1 to 1 / 3 of the circular cross-section of the jet tube 1, and then gradually increases to the same as the circular cross-section of the jet tube 1. The design of the guide wall 8 forms a negative pressure during the mixing process, which can accelerate the suction of the fluid and achieve the purpose of sufficient mixing in a shorter time.

[0033] Furthermore, a fifth temperature monitoring unit 27 is provided at the discharge port 7 to monitor the temperature of the chlorosilane liquid containing resin and nitrogen.

[0034] Furthermore, a cooling medium inlet 5 is arranged on the outside of the cooling tube 4, close to the end of the discharge port 7, and a cooling medium outlet 6 is arranged on the end away from the discharge port 7. The diameter of the cooling tube 4 is 1.5 to 2.5 times larger than the diameter of the jet tube 1; the cooling medium is filled between the jet tube 1 and the cooling tube 4; the fluid in the jet tube forms a countercurrent heat exchange with the cooling medium in the cooling tube, which can quickly take away the heat generated during the material mixing process.

[0035] It should be noted that the cooling medium can be water, chilled brine, a mixed solution of water and ethylene glycol, calcium chloride or sodium chloride solution, etc.

[0036] Furthermore, a third temperature monitoring unit 25 is provided at the cooling medium inlet 5, and a fourth temperature monitoring unit 26 is provided at the cooling medium outlet 6. The third temperature monitoring unit 25 and the fourth temperature monitoring unit 26 are used to detect the inlet and outlet temperatures of the cooling medium to ensure the heat exchange effect.

[0037] Furthermore, a nitrogen inlet 10 and a resin inlet 11 are provided at the top of the filling tank 9, and valves are provided at the nitrogen inlet 10 and the resin inlet 11 to control the feeding rate; a mixing outlet 12 is provided at the bottom of the filling tank 9, and the mixing outlet 12 is connected to the feed side pipe 3 through a pipe 13. A first temperature monitoring unit 17 and a first pressure monitoring unit 18 are provided at the bottom of the filling tank 9 to monitor the temperature and pressure in the filling tank 9. A second flow monitoring unit 24, a check valve 23, a second temperature monitoring unit 22 and a third pressure monitoring unit 21 are provided on the pipe 13 close to the feed side pipe 3, and the third pressure monitoring unit 21, the second temperature monitoring unit 22 and the second flow monitoring unit 24 respectively monitor the temperature, pressure and flow of the mixture of nitrogen and resin particles entering the jet tube 1; the check valve 23 prevents the material from flowing back to ensure the normal operation of the reaction. In the filling tank, the nitrogen dries the resin so that the moisture content of the resin meets the filling requirements and avoids safety hazards in the production process.

[0038] Furthermore, the pipeline 13 is also connected to a nitrogen pipeline, on which a first flow monitoring unit 20 and a second pressure monitoring unit 19 are provided for monitoring the flow and pressure of the incoming nitrogen respectively. The monitoring of pressure and flow ensures the safety and stability during the filling process.

[0039] A second flange 15 is arranged outside the jet tube 1 between the feed side tube 3 and the cooling tube 4; a first flange 14 and a third flange 16 are arranged at both ends of the jet tube 1 respectively, and the first flange 14, the second flange 15 and the third flange 16 are arranged for fixing the resin jet filling device.

[0040] The method for using the resin jet filling device comprises:

[0041] Nitrogen and resin are added into the filling tank 9 to dry the resin until the filling standard is reached. The mixture of nitrogen and resin particles enters the jet tube 1 from the feed side tube 3, and chlorosilane enters the jet tube 1 from the feed pipe 2. The chlorosilane and resin are mixed in the jet tube 1. After being mixed evenly, the chlorosilane liquid containing the resin and nitrogen is sent to the fixed bed device for reaction. The heat generated in the mixing process of the jet tube 1 is taken away by the cooling medium in the cooling tube 4.

[0042] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0043] In addition, it should be understood that although this specification is described in accordance with the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A resin jet filling device, characterized in that: The invention comprises a jet tube (1), wherein a feed tube (2) is arranged inside one end of the jet tube (1), a flow guide wall (8) is arranged on the inner wall of the jet tube (1) at the outlet side of the feed tube (2), a cooling tube (4) is arranged on the outer side of the jet tube (1), and the other end of the jet tube (1) is a discharge port (7); A feed side pipe (3) is arranged on the outside of the jet pipe (1) near the outlet of the feed pipe (2), and the feed side pipe (3) is connected to the filling tank (9).

2. A resin jet filling device according to claim 1, characterized in that: The diameter of the feed pipe (2) from the inlet to the outlet first remains unchanged, and then gradually decreases, with the outlet diameter decreasing to 1 / 3 of the inlet diameter.

3. A resin jet filling device according to claim 1, characterized in that: The guide wall (8) causes the flow cross section in the jet tube (1) to gradually decrease to 1 / 3 of the circular cross section of the jet tube (1), and then gradually increase to the same as the circular cross section of the jet tube (1).

4. A resin jet filling device according to claim 1, characterized in that: The diameter of the cooling tube (4) is 1.5 to 2.5 times greater than the diameter of the jet tube (1).

5. The resin jet filling device according to claim 1, characterized in that: A cooling medium inlet (5) is arranged outside the cooling pipe (4) at one end close to the discharge port (7), and a cooling medium outlet (6) is arranged at one end away from the discharge port (7).

6. A resin jet filling device according to claim 5, characterized in that: The cooling medium inlet (5) is provided with a third temperature monitoring unit (25), and the cooling medium outlet (6) is provided with a fourth temperature monitoring unit (26).

7. The resin jet filling device according to claim 1, characterized in that: A cooling medium is filled between the fluid in the jet tube (1) and the cooling tube (4), and the cooling medium comprises one of water, frozen salt water, a mixed solution of water and ethylene glycol, a calcium chloride solution or a sodium chloride solution.

8. The resin jet filling device according to claim 1, characterized in that: A nitrogen inlet (10) and a resin inlet (11) are arranged at the top of the filling tank (9), and a mixing outlet (12) is arranged at the bottom of the filling tank (9). The mixing outlet (12) is connected to the feed side pipe (3) through a pipeline (13).

9. A resin jet filling device according to claim 8, characterized in that: A first temperature monitoring unit (17) and a first pressure monitoring unit (18) are arranged at the bottom of the filling tank (9); a second flow monitoring unit (24), a check valve (23), a second temperature monitoring unit (22) and a third pressure monitoring unit (21) are arranged in sequence on the pipeline (13) close to the feed side pipe (3).

10. The resin jet filling device according to claim 8, characterized in that: The pipeline (13) is connected to a nitrogen pipeline, and a second pressure monitoring unit (19) and a first flow monitoring unit (20) are arranged on the nitrogen pipeline.

Images