Energy-saving efficient polysilicon ingot furnace with orientated water cooling and heat dissipation function

Abstract

The invention relates to a production technology of polysilicon and aims at providing an energy-saving efficient polysilicon ingot furnace with a orientated water cooling and heat dissipation function. The energy-saving efficient polysilicon ingot furnace with the orientated water cooling and heat dissipation function comprises a furnace body, a heat insulation cage, a graphite protection plate, an orientated heat dissipation block, a bottom heat insulation plate, a heat insulation shutter, a water cooling copper plate, a water cooling copper pipe, a graphite support column, a heat insulation sliding door, a quartz crucible, a top heater and a side heater. Bottom water cooling of the furnace has an orientated effect; only a DS block is subjected to radiation and heat absorption; the working of the heater is not influenced; therefore, a cold source and a heat source are completely isolated and do not act on each other; the phenomenon of power increase of the heater when the heat insulation cage of the furnace is lifted is avoided; the bottom heat insulation plate and the heat insulation louver are matched to achieve continuously adjustable cooling capacity; the heat dissipation requirement of a crystal growth stage is met; in a heating and melting stage, the bottom heat insulation sliding door are closed completely to exert a certain heat insulation effect; the heat loss of the furnace is further reduced; and an energy-saving effect of the furnace is achieved.

Description

technical field [0001] The invention relates to the technical field of polysilicon production, in particular to an energy-saving and high-efficiency polysilicon ingot furnace with directional water cooling and heat dissipation. Background technique [0002] The polycrystalline ingot furnace is a professional equipment used to prepare solar-grade polycrystalline silicon ingots, and has developed rapidly with the vigorous rise of the photovoltaic industry. The production process of polycrystalline ingot is actually a process of melting and recrystallizing silicon material, which needs to go through processes such as charging, vacuuming, heating, melting, crystal growth, annealing, cooling, and furnace release. [0003] In recent years, domestic and foreign enterprises have actively explored and tested in order to improve the conversion efficiency of polysilicon ingot cells. The seed crystal method for high-efficiency polysilicon is currently a relatively mature and feasible me...

AI Technical Summary

Problems solved by technology

When the seed crystal is kept, after opening the cage to dissipate heat, the heat dissipation around the DS block will be faster, and the temperature will be cooler, forming a temperature gradient in the horizontal direction. The thermal uniformity of the DS block is difficult to ensure, and the seed crystal retention effect is poor.

In addition, the heat dissipation by opening the cage will take away more heat, which will affect the work of the heater and form a pair of contradictions between cold and heat, which is manifested by the continuous increase in the power of the heater, which will eventually increase the power consumption

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