Polycrystalline silicon material conveying system

Abstract

The utility model provides a polycrystalline silicon material conveying system. The polycrystalline silicon material conveying system is characterized in that the output end of a rectifying tower is respectively connected with the inlet ends of two branch pipes through a header pipe; the inlet end of the reduction workshop is connected to the outlet end of one branch pipe; a flow meter is arranged on the branch pipe; and the inlet end of the rectification tank area is connected to the outlet end of the other branch pipe. According to the utility model, the second switch valve is electrically connected with the flow meter, so that the real-time monitoring and automatic adjustment of the flow are realized, and the flow flowing to a rectification tank area is reduced when the flow flowing to a reduction workshop is relatively large, and vice versa.

Description

Technical Field

[0001] This application relates to the technical field of polysilicon conveying devices, and more specifically to the technical field of a polysilicon material conveying system. Background Technology

[0002] In existing technologies for polysilicon material handling, the material is first stored in a tank area and then transported to downstream processes, such as the reduction workshop, via pumps. This process presents several major problems:

[0003] 1. Long storage time of materials: Long-term storage of materials in the tank area may cause metal impurities inside the spherical tank to be incorporated into the materials, affecting the purity and quality of polysilicon products.

[0004] 2. Quality Risk: The introduction of metallic impurities has a negative impact on the performance of polycrystalline silicon products, especially in applications such as photovoltaics, where high-purity polycrystalline silicon has a greater advantage.

[0005] 3. Fluctuations in distillation column output: When polysilicon is directly transported from the distillation column to the reduction workshop, fluctuations in the output of the distillation column may occur, affecting the stability and efficiency of production. Utility Model Content

[0006] To address the issues of fluctuations in distillate output during direct distillation and significant quality degradation caused by storage in tank farms in existing technologies.

[0007] A polycrystalline silicon material conveying system according to this application includes:

[0008] A distillation column, wherein the output end of the distillation column is connected to the inlet ends of two branch pipes via a main pipe;

[0009] A reduction workshop, the inlet of which is connected to the outlet of one of the branch pipes; the branch pipe is equipped with a flow meter;

[0010] The distillation tank area has its inlet connected to the outlet of another branch pipe.

[0011] Furthermore, the switching valve assembly includes a first switching valve and a second switching valve; the first switching valve is located on the main pipe, and the second switching valve is located on the branch line connecting to the distillation tank area.

[0012] Furthermore, the second switching valve is electrically connected to the flow meter.

[0013] Furthermore, the main pipe includes two first ball valves, with two first ball valves respectively provided on both sides of the first switching valve.

[0014] Furthermore, a first parallel side passage is provided on one side of the main pipe, and a second ball valve is provided on the first parallel side passage.

[0015] Furthermore, a third ball valve is provided on each side of the branch where the second switching valve is located.

[0016] Furthermore, a second parallel side path is provided on one side of the branch where the second switching valve is located, and a fourth ball valve is provided on the second parallel side path.

[0017] Compared with the prior art, the beneficial results of this utility model are as follows:

[0018] This invention achieves real-time monitoring and automatic adjustment of flow rate through the electrical connection between the second switching valve and the flow meter, thereby reducing the flow rate to the distillation tank area when the flow rate to the reduction workshop is large, and vice versa.

[0019] This invention, through the design of a first parallel side path and a second ball valve, helps to disperse pressure under high pressure and high temperature impacts, reducing pressure impacts on the main valve and thus reducing the risk of leakage. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments, taken with reference to the accompanying drawings:

[0021] Figure 1 This is a circuit diagram of a polycrystalline silicon material conveying system according to this application.

[0022] Distillation column: 1

[0023] Manager: 11

[0024] First ball valve: 111

[0025] First parallel side road: 112

[0026] Second ball valve: 113

[0027] Third ball valve: 114

[0028] Fourth ball valve: 115

[0029] Second parallel side road: 121

[0030] Restoration workshop: 2

[0031] Flow meter: 211

[0032] First branch pipe: 21

[0033] Second branch pipe: 22

[0034] Distillation tank area: 3

[0035] First switching valve: 41

[0036] Second switching valve: 42 Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] like Figure 1 As shown, a polycrystalline silicon material conveying system includes:

[0040] Distillation column 1, the output end of distillation column 1 is connected to the inlet end of two branch pipes 21 or 22 respectively through the main pipe 11;

[0041] The inlet of the reduction workshop 2 is connected to the outlet of one of the branch pipes 21; a flow meter 211 is installed on the branch pipe 21.

[0042] Distillation tank area 3, the inlet end of which is connected to the outlet end of another branch pipe 22.

[0043] This invention distributes the output of the distillation column 1 to two different paths via the main pipe 11, namely the reduction workshop 2 or the distillation tank area 3. The flow rate entering the reduction workshop 2 can then be detected in real time by the flow meter.

[0044] In order to control the flow rate of the main pipe 11 and the two branches 21 or 22, a switching valve assembly can be installed on the corresponding pipeline. The switching valve assembly includes a first switching valve 41 and a second switching valve 42.

[0045] In a preferred embodiment, a first switching valve 41 is now provided on the main pipe 11, and the first switching valve 41 can control the output and stop of the main pipe 11.

[0046] In a preferred embodiment, a second switching valve 42 is provided on the branch line 21 or 22 leading to the distillation tank area 3 to control the flow rate into the reduction workshop 2. Thus, when the flow rate into the reduction workshop 2 decreases, the second switching valve can be opened in time to allow the excess flow rate to enter the distillation tank area 3. Similarly, when the flow rate into the reduction workshop 2 increases, the second switching valve 42 can be closed to prevent the flow rate from flowing into the distillation tank area 3.

[0047] In a preferred embodiment, the second switching valve 42 is electrically connected to the flow meter 211. Through this electrical connection, the second switching valve 42 can automatically adjust its opening degree according to the flow data monitored in real time by the flow meter 211, thereby achieving precise flow control.

[0048] In a preferred embodiment, the main pipe 11 includes two first ball valves 111, and two first ball valves 111 are respectively provided on both sides of the first switching valve 41. When maintenance or repair of the first switching valve 41 is required, the area can be isolated by closing the first ball valves 111 on both sides, so that maintenance work can be carried out safely without affecting the operation of the entire system.

[0049] In a preferred embodiment, a first parallel side passage 112 is provided on one side of the main pipe 11, and a second ball valve 113 is provided on the first parallel side passage 112. Under high pressure and high temperature impacts, the first parallel side passage 112 is located on one side of the main pipe 11 to reduce the risk of leakage. The parallel side passage can distribute pressure and reduce pressure impact on the main valve. Furthermore, in an emergency, if the main pipe 11 leaks or malfunctions, the material can be safely guided to the first parallel side passage 112 by closing the first ball valve 111 to prevent further escalation of the accident.

[0050] In a preferred embodiment, a third ball valve 114 is provided on both sides of the branch 21 or 22 where the second switching valve 42 is located.

[0051] In a preferred embodiment, a second parallel side path 121 is provided on one side of the branch 21 or 22 where the second switching valve 42 is located, and the second parallel side path 121 is provided with a fourth ball valve 115. In an emergency, if a leak or other malfunction occurs in the branch 21 or 22, the material can be safely guided to the second parallel side path 121 by closing the third ball valve 114 to avoid further escalation of the accident.

[0052] In addition to the above embodiments, this utility model also has the following operating methods:

[0053] System startup:

[0054] Open the first switch valve 41 to allow the material in the distillation column 1 to flow through the main pipe 11 to the two branch pipes 12. Adjust the opening of the first switch valve 41 as needed to control the flow rate of the material to the two branch pipes 12.

[0055] Flow control:

[0056] The flow rate of material flowing to the reduction workshop 2 is controlled by the second switching valve 42.

[0057] When the reduction workshop 2 needs more material, the second switch valve 42 is opened; when the demand decreases, the second switch valve 42 is closed to reduce the amount of material flowing into the reduction workshop 2, and the excess material will flow to the distillation tank area 3.

[0058] Flow monitoring and automatic control:

[0059] Flow meter 211 monitors the flow rate of materials entering reduction workshop 2 in real time.

[0060] The second switching valve 42 is electrically connected to the flow meter 211, and automatically adjusts its opening degree according to the data from the flow meter to achieve precise flow control.

[0061] System maintenance and security:

[0062] When maintenance or repair of the first switching valve 41 is required, the first ball valves 111 on both sides are closed to isolate the main pipe 11 and ensure the safety of maintenance work.

[0063] Under high pressure and high temperature impact, the pressure is dispersed by the first parallel side circuit 112 and the second ball valve 113, reducing the pressure impact on the main valve and reducing the risk of leakage.

[0064] Emergency handling:

[0065] If a leak or other malfunction occurs in the main pipe 11, immediately close the first ball valve 111 and guide the material to the first parallel side pipe 112 to avoid further escalation of the accident.

[0066] If a leak or other malfunction occurs in branch 21 or 22 where the second switching valve 42 is located, close the third ball valve 114 to guide the material to the second parallel side branch 121 to ensure the safety of the system.

[0067] System stopped:

[0068] When the system needs to be stopped, first close the first switch valve 41 to cut off the material flow from distillation column 1 to the two branch pipes 12. Then, as needed, gradually close the second switch valve 42, the third ball valve 114, and the fourth ball valve 115 to ensure the system completely stops operating.

[0069] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described utility model concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A polycrystalline silicon material conveying system, characterized in that, include: A distillation column, wherein the output end of the distillation column is connected to the inlet ends of two branch pipes via a main pipe; A reduction workshop, the inlet of which is connected to the outlet of one of the branch pipes; the branch pipe is equipped with a flow meter; A distillation tank area, the inlet of which is connected to the outlet of another branch pipe; a switching valve assembly, which includes a first switching valve and a second switching valve; the first switching valve is located on the main pipe, and the second switching valve is located on the branch pipe connecting to the distillation tank area.

2. The polycrystalline silicon material conveying system according to claim 1, characterized in that, The second switching valve is electrically connected to the flow meter.

3. The polycrystalline silicon material conveying system according to claim 1, characterized in that, The main pipe includes two first ball valves, with two first ball valves respectively located on both sides of the first switching valve.

4. The polycrystalline silicon material conveying system according to claim 1, characterized in that, A first parallel side passage is provided on one side of the main pipe, and a second ball valve is provided on the first parallel side passage.

5. A polycrystalline silicon material conveying system according to claim 2, characterized in that, A third ball valve is provided on each side of the branch where the second switching valve is located.

6. A polycrystalline silicon material conveying system according to claim 2, characterized in that, A second parallel side path is provided on one side of the branch where the second switching valve is located, and a fourth ball valve is provided on the second parallel side path.

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