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Zinc wire feeding device

A feeding device and zinc wire technology, applied in the direction of inorganic chemistry, non-metallic elements, silicon compounds, etc., to achieve the effects of high equipment stability, low energy consumption, and simple structure

Active Publication Date: 2012-07-04
上海太阳能工程技术研究中心有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

In this process, zinc and SiCl 4 The molar ratio of the product has a great influence on the morphology and yield of the product. However, due to reasons such as high temperature and corrosion, there is currently no device that can precisely control the feed amount of gaseous zinc so that the zinc and SiCl can be adjusted. 4 The molar ratio of the reaction

Method used

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  • Zinc wire feeding device
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Experimental program
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Embodiment Construction

[0025] see figure 1 , the zinc wire feeding device of the present invention is sealed and connected with the polysilicon reactor produced by the zinc reduction method. It includes a zinc wire supply mechanism 1, a fixed panel 2, a wire feeding mechanism 3, a zinc wire guide wheel 4, a zinc wire directional wheel 5 and a zinc wire feeding sleeve 6. The zinc wire providing mechanism 1, the fixed panel 2 and the zinc wire feeding casing 6 are arranged in sequence according to the advancing route of the zinc wire 7. The wire feeding mechanism 3, the zinc wire guide wheel 4 and the zinc wire orientation wheel 5 are fixed on the fixed panel 2 in sequence according to the advancing path of the zinc wire 7. The zinc wire 7 drawn out by the zinc wire supply mechanism 1 passes through the wire feeding mechanism 3 , the zinc wire guide wheel 4 , the zinc wire directional wheel 5 and the zinc wire feeding casing 6 into the zinc reduction method polysilicon reactor. A first inert gas inl...

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Abstract

The invention provides a zinc wire feeding device, which comprises a zinc wire supply mechanism, a fixing panel, a wire feeding mechanism, a zinc wire guide wheel, a zinc wire directional wheel and a zinc wire feeding sleeve. The zinc wire supply mechanism, the fixing panel and the zinc wire feeding sleeve are sequentially arranged. The wire feeding mechanism, the zinc wire guide wheel and the zinc wire directional wheel are sequentially fixed on the fixing panel. A first inert gas inlet pipe and a second inert gas inlet pipe are connected on the zinc wire feeding sleeve. By controlling rotation speed of a servo motor or an asynchronous motor, accurate feeding amount of zinc in unit time is guaranteed, and by adopting inert gases and the feeding sleeve for protection, outside air can be effectively prevented from entering a reactor of preparing polycrystalline silicon with the method of zinc reduction. The zinc wire feeding device is simple in structure, low in energy consumption, high in device stability, easy to operate and convenient to maintain.

Description

technical field [0001] The invention relates to photovoltaic technology, in particular to a zinc wire feeding device. Background technique [0002] In the photovoltaic industry, the production processes of polysilicon mainly include Siemens method, improved Siemens method, silane thermal decomposition method and fluidized bed method. In addition, there are regional smelting methods to purify metallurgical grade silicon. while using SiHCl 3 The solar-grade polysilicon supplied by the improved Siemens method as a raw material accounts for 70-80% of the world's solar-grade polysilicon supply. In foreign countries, every kilogram of solar-grade polysilicon will produce 10-15 kilograms of SiCl 4 , through SiCl 4 After the hydrogenation-reduction closed-loop process cycle, SiCl 4 The emissions are still as high as 5-10Kg / kg polysilicon. [0003] Due to SiCl 4 It is more harmful to people, organisms and the environment, so SiCl 4 Environmental hazards and huge storage proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/033
Inventor 李红波张滢清张愿成张玉霞贺珍俊
Owner 上海太阳能工程技术研究中心有限公司
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