Polycrystalline silicon cleaning machine and method for cleaning polycrystalline silicon

Abstract

The invention discloses a polycrystalline silicon cleaning machine and a method for cleaning polycrystalline silicon. The polycrystalline silicon cleaning machine comprises a body and an inert gas blowing device, a mechanical arm, an acid corrosion groove, a first rapid flushing groove, a second rapid flushing groove and a pure water transition groove are mounted in the body, the acid corrosion groove, the first rapid flushing groove, the second rapid flushing groove and the pure water transition groove are mounted in sequence, the inert gas blowing device comprises a gas conveying pipeline and multiple air knife spraying openings, the gas conveying pipeline extends into the body and extends to the position above the acid corrosion groove and the first rapid flushing groove, the air knifespraying openings are formed in the gas conveying pipeline and are distributed at intervals in the direction of the gas conveying pipeline, and the air knife spraying openings independently face the acid corrosion groove area and the first rapid flushing groove areas. The polycrystalline silicon cleaning machine is simple in structure, convenient to mount, small in investment, rapid in effect taking. The secondary pollution to polycrystalline silicon materials due to contact of acid and air in the acid pickling process of the polycrystalline silicon materials can be effectively solved, and thecleaning quality and the cleaning effect can be ensured.

Description

technical field [0001] The invention belongs to the field of solar energy, and in particular relates to a polysilicon cleaning machine and a method for cleaning polysilicon. Background technique [0002] In the existing polysilicon cleaning process, the surface-contaminated polysilicon block is mainly soaked in a mixed solution of nitric acid and hydrofluoric acid, and the surface of the polysilicon is detached from the surface of the polysilicon by the chemical reaction between the acid and the surface of the polysilicon. , so as to improve the surface purity of polysilicon, and provide high-quality raw materials for later ingot casting or single crystal processes. Polysilicon automatic cleaning equipment is a new technology widely used in the field of solar energy in recent years. At present, the existing process technology mainly improves the sealing of the main body of the equipment to improve the sealing performance of the equipment itself, but it cannot prevent the ent...

AI Technical Summary

Problems solved by technology

The polysilicon cleaning machine is not only simple in structure, easy to install, small in investment and quick in effect, but also can effectively solve the problem of secondary pollution of polysilicon materials caused by the contact between acid and air during the pickling process, and ensure the cleaning quality and cleaning effect. Improve product quality and reduce labor intensity

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