Polytetrafluoroethylene sleeve of polycrystalline silicon reduction furnace

Abstract

The utility model discloses a polytetrafluoroethylene sleeve of a polycrystalline silicon reduction furnace, which comprises a polytetrafluoroethylene sleeve body, the polytetrafluoroethylene sleeve body comprises a top part and a rod part, the top part is arranged on the rod part, and the cross section area of the top part is larger than that of the rod part; and the height of the top is smaller than that of the top of the teflon sleeve in the prior art. According to the technical scheme, the structural size of the polytetrafluoroethylene sleeve is improved, and through the improved polytetrafluoroethylene sleeve, the problems of aging, insulation reduction and even pollution of polycrystalline silicon caused by discharge during use of the polytetrafluoroethylene sleeve are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon reduction furnaces, in particular to a polysilicon reduction furnace polytetrafluoroethylene jacket. Background Art

[0002] During the operation of the polysilicon reduction furnace, the PTFE sleeve has the following functions:

[0003] Insulation function: The PTFE sleeve can be used as an insulating material between the electrode and the furnace body to ensure the smooth passage of current while avoiding current leakage and electric shock accidents;

[0004] High temperature resistance: The reaction temperature in the polysilicon reduction furnace is usually very high. The PTFE sleeve has good high temperature resistance and can maintain its shape and performance at high temperatures to prevent damage caused by high temperatures.

[0005] Corrosion resistance: In the polysilicon reduction furnace, various acidic or alkaline solutions are usually used for cleaning and reaction. The PTFE sleeve has good corrosion resistance and can prevent acidic and alkaline solutions from causing corrosion damage to it;

[0006] Reduce friction: In the polysilicon reduction furnace, the PTFE sleeve can be used as a sliding part to reduce the friction between the furnace body and the electrode, reduce mechanical wear, and extend the service life of the equipment;

[0007] Thermal insulation effect: The PTFE sleeve has good thermal insulation performance, which can reduce heat transfer and heat loss and improve energy utilization.

[0008] In general, the PTFE sleeve in the polysilicon reduction furnace has the functions of insulation, high temperature resistance, corrosion resistance, friction reduction and heat insulation, which can ensure the normal operation and production safety of the polysilicon reduction furnace.

[0009] In the prior art, after running several cycles, the PTFE jacket of the reduction furnace often ages, the insulation is reduced, and even discharge occurs, causing contamination of polysilicon.

[0010] Through analysis, the possible causes are as follows: Temperature fluctuation: Temperature fluctuation in the reduction furnace may cause thermal expansion and contraction of the PTFE sleeve, accelerating its aging process. Pressure change: Pressure fluctuation in the reduction furnace may cause mechanical stress to the PTFE sleeve, resulting in damage or performance degradation. Chemical erosion: Chemical substances used in the furnace may corrode the PTFE sleeve, resulting in performance degradation. Physical wear: The PTFE sleeve may be eroded and rubbed by the materials in the furnace during operation, resulting in surface damage. Electrode problem: The electrodes used in conjunction with the PTFE sleeve may have problems such as uneven electric field, resulting in discharge. Through analysis, it is determined that the structural design of the PTFE sleeve is unreasonable. Therefore, a PTFE sleeve with a new structural size for a polysilicon reduction furnace is provided. Utility Model Content

[0011] The purpose of the utility model is to provide a polysilicon reduction furnace PTFE sleeve in view of the above-mentioned existing problems, improve the structural dimensions of the PTFE sleeve, and solve the aging phenomenon of the PTFE sleeve during use, the reduction of insulation, and even the pollution of polysilicon caused by discharge.

[0012] The technical solution of the utility model is as follows:

[0013] A polysilicon reduction furnace polyfluoro sleeve comprises a polyfluoro sleeve body, wherein the polyfluoro sleeve body comprises a top and a rod, wherein the top is arranged on the rod, and the cross-sectional area of ​​the top is larger than the cross-sectional area of ​​the rod; and the height dimension of the top is smaller than the height dimension of the top of the polyfluoro sleeve in the prior art.

[0014] Furthermore, the connection between the top and the rod is in a stepped structure.

[0015] Furthermore, the height dimension of the top is shortened by 10 mm compared with the height dimension of the top of the existing polytetrafluoroethylene sleeve.

[0016] Furthermore, the height of the PTFE sleeve body is 387.5 mm, and the height of the top is 72.5 mm.

[0017] Furthermore, the width of the top is 75 mm, and the width of the rod is 60 mm.

[0018] Furthermore, the thickness of the rod and the top is 5 mm.

[0019] Compared with the existing technology, the beneficial effects of the utility model are:

[0020] 1. A polysilicon reduction furnace with a PTFE jacket. After the technical transformation, the phase deficiency rate of the reduction furnace has been effectively reduced. It has been reduced from the original 40% to 13%. This reduction in figures indicates that the efficiency of the reduction furnace has been improved during operation, and it also means that the waste in the production process has been reduced;

[0021] 2. A polysilicon reduction furnace PTFE sleeve, through improvement, the monthly average abnormal material ratio of the reduction furnace has also been significantly reduced. From the original 4.5% to 2.3%, this reduction in ratio can reduce the loss of abnormal materials by up to 176 tons per month. Calculated at 15,000 yuan per ton, it can reduce the loss by 2.64 million yuan per month. Not only does it reduce economic losses, but it also enhances the stability and reliability of the production process;

[0022] 3. A polysilicon reduction furnace PTFE jacket, by improving and optimizing the design of the reduction furnace PTFE jacket, not only improves its operating efficiency and safety, but also beautifies its operating process and results. These improvements not only bring economic benefits, but also enhance the operator's ability to master the operation of the reduction furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic diagram of the size and structure of a polyfluoro sleeve of a polysilicon reduction furnace.

[0024] Figure 2 The figure is a schematic diagram of the size structure of an improved polyfluoro sleeve of a polysilicon reduction furnace.

[0025] Reference numerals: 1-top, 2-rod. DETAILED DESCRIPTION

[0026] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0028] See also Figure 1-2 A polysilicon reduction furnace polyfluoro sleeve includes a polyfluoro sleeve body, the polyfluoro sleeve body includes a top and a rod, the top is arranged on the rod, the cross-sectional area of ​​the top is larger than the cross-sectional area of ​​the rod; the height dimension of the top is smaller than the height dimension of the top of the polyfluoro sleeve in the prior art.

[0029] The connection between the top and the rod is in a stepped structure.

[0030] The height dimension of the top is shortened by 10 mm compared with the height dimension of the top of the existing polytetrafluoroethylene sleeve.

[0031] The height of the PTFE sleeve body is 387.5 mm, and the height of the top is 72.5 mm.

[0032] The width of the top portion is 75 mm, and the width of the stem portion is 60 mm.

[0033] The thickness of the stem and the top is 5 mm.

[0034] like Figure 1 As shown, the dimensions of the prior art PTFE sleeve are as follows: the height of the PTFE sleeve body is 397.5 mm, the height of the top is 82.5 mm, the width of the rod is 60 mm, the width of the top is 75 mm, and the thickness of the top and the rod is 5 mm.

[0035] Compared with the existing technology, the phase deficiency rate of the reduction furnace has been effectively reduced after the technical transformation of the utility model. It has been reduced from the original 40% to 13%. This reduction in figures indicates that the efficiency of the reduction furnace has been improved during operation, and it also means that the waste in the production process has been reduced;

[0036] Through the improvement, the monthly average abnormal material ratio of the reduction furnace has also been significantly reduced. From the original 4.5% to 2.3%, this reduction in the ratio can reduce the loss of abnormal materials by up to 176 tons per month. Calculated at 15,000 yuan per ton, the monthly loss can be reduced by 2.64 million yuan. Not only has the economic loss been reduced, but the stability and reliability of the production process have also been enhanced;

[0037] By improving and optimizing the design of the PTFE sleeve of the reduction furnace, not only its operating efficiency and safety are improved, but also its operating process and results are beautified. These improvements not only bring economic benefits, but also enhance the operator's ability to master the operation of the reduction furnace.

[0038] In the optimization of the design structure of the PTFE sleeve of the reduction furnace, the method for shortening the top length of the PTFE sleeve by 10 mm includes the following steps:

[0039] 1. Measurement and marking: First, measure the existing PTFE sleeve to determine its top length. Then, according to the design requirements, use a marking pen or related tools to mark the shortened length on the PTFE sleeve.

[0040] 2. Cutting tool preparation: Select the appropriate cutting tool according to the material and thickness of the PTFE sleeve. For PTFE sleeves, you may need to use a special plastic or resin cutting tool to ensure that the cutting surface is flat and free of burrs.

[0041] 3. Cutting operation: Cut according to the marked marks. During the operation, make sure that the cutting tool is perpendicular to the surface of the PTFE sleeve to obtain a smooth cutting surface. You can test it many times to find the best cutting depth and speed.

[0042] 4. Edge processing: After cutting, trim and process the edge of the PTFE sleeve. Use sandpaper or file to remove burrs and uneven parts to make the top of the PTFE sleeve smoother.

[0043] 5. Inspection and adjustment: After cutting and edge processing, inspect the PTFE sleeve. Make sure its top length meets the design requirements, and check for other potential problems such as cracks or damage. If necessary, make appropriate adjustments or repairs.

[0044] 6. Installation and testing: Install the optimized PTFE sleeve into the reduction furnace or other related equipment for testing. Make sure it fits well with other parts of the equipment without interference or looseness. At the same time, observe its performance under working conditions to ensure that it meets performance requirements.

[0045] It should be noted that care should be taken during operation to avoid damage to the PTFE sleeve due to excessive heating or use of improper tools. At the same time, other related adjustments and tests may be required depending on the actual situation and equipment requirements.

[0046] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A polysilicon reduction furnace polytetrafluoroethylene jacket, characterized in that: The invention comprises a polyfluoro sleeve body, wherein the polyfluoro sleeve body comprises a top and a rod, wherein the top is arranged on the rod, and the cross-sectional area of ​​the top is larger than the cross-sectional area of ​​the rod; and the height dimension of the top is smaller than the height dimension of the top of the polyfluoro sleeve in the prior art.

2. A polycrystalline silicon reduction furnace polytetrafluoroethylene jacket according to claim 1, characterized in that: The connection between the top and the rod is in a stepped structure.

3. A polycrystalline silicon reduction furnace polytetrafluoroethylene jacket according to claim 1, characterized in that: The height dimension of the top is shortened by 10 mm compared with the height dimension of the top of the existing polytetrafluoroethylene sleeve.

4. A polycrystalline silicon reduction furnace polytetrafluoroethylene jacket according to claim 1, characterized in that: The height of the PTFE sleeve body is 387.5 mm, and the height of the top is 72.5 mm.

5. The polysilicon reduction furnace polytetrafluoroethylene jacket according to claim 1, characterized in that: The width of the top portion is 75 mm, and the width of the stem portion is 60 mm.

6. A polycrystalline silicon reduction furnace polytetrafluoroethylene jacket according to claim 1, characterized in that: The thickness of the stem and the top is 5 mm.

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