Energy-saving polycrystalline ingot furnace

Abstract

The invention provides an energy-saving polycrystalline ingot furnace. The energy-saving polycrystalline ingot furnace comprises an outer furnace body, an inner furnace body, a ceramic quartz crucibleand a heating body; the outer furnace body is connected with a lifting device for driving the outer furnace body to move up and down; the heating body is wrapped on the outer wall of the ceramic quartz crucible; the inner furnace body sleeves the outer surface of the heating body; a gap is formed between the inner furnace body and the heating body; a temperature control device for carrying out heat dissipation or heat preservation on the outer surface of the heating body is arranged on the inner furnace body; the temperature control device comprises control rods which are uniformly arranged in the inner furnace body; a plurality of reflection plates are longitudinally connected to each control rod; the two plate surfaces of each reflection plate are coated with a heat reflection coating;the control rods are longitudinally inserted into the inner furnace body; through the moving up of the control rods, the reflection angle of the reflection plates can be changed one by one from bottomto top; and the control rods are fixedly connected with the outer furnace body. The energy-saving polycrystalline ingot furnace has the advantages that the movement of the outer furnace body and thetemperature of crystal growth can be controlled synchronously, and the like.

Description

technical field [0001] The invention relates to an ingot casting furnace, in particular to an energy-saving polycrystalline ingot casting furnace. Background technique [0002] The growth of polysilicon is mainly accomplished by the directional growth of silicon material in the polysilicon ingot furnace. In this process, the polysilicon raw material undergoes a growth process from solid state to melting in the ingot furnace, and then from crystal growth to solid state. The whole production process needs to consume a lot of electric energy. At present, the average energy consumption index of the industry is that every kilogram of polysilicon produced requires 8 degrees of electricity. If the average silicon material is loaded at 620 kilograms per furnace, the production of one furnace requires 4960 degrees of electricity. quantity. [0003] In the Chinese patent with the application number [CN201410107701.5], it is disclosed that the present invention provides an energy-sav...

AI Technical Summary

Problems solved by technology

The whole production process needs to consume a lot of electric energy. At present, the average energy consumption index of the industry is that every kilogram of polysilicon produced requires 8 degrees of electricity. If the average silicon material is loaded at 620 kilograms per furnace, the production of one furnace requires 4960 degrees of electricity. quantity

[0003] In the Chinese patent with the application number [CN201410107701.5], it is disclosed that the present invention provides an energy-saving device for a polysilicon ingot furnace to solve the problem of power consumption caused by the large heat loss in the production process of the existing polysilicon ingot furnace Big technical problem; including the upper furnace body of the polysilicon ingot casting furnace and the lower furnace body of the polysilicon ingot casting furnace. A heat insulation cage lifting device is installed on the top of the upper furnace body of the polysilicon ingot casting furnace. The heat insulation cages set in the furnace are mechanically connected together, heat insulation blankets are set on the side walls around the heat insulation cage, water cooling jackets are set on the furnace wall of the polysilicon ingot casting furnace, and the inside of the upper furnace body of the polysilicon ingot casting furnace There are upper rectangular shutters arranged on the wall along the vertical direction, and lower rectangular shutters are arranged on the inner wall of the lower furnace body of the polysilicon ingot furnace along the vertical direction. One end of the upper rectangular shutter blade driving shaft is fixedly provided with an upper rectangular shutter blade driving gear, the lower rectangular shutter blade is provided with a lower rectangular shutter blade driving shaft, and one end of the lower rectangular shutter blade driving shaft is fixedly provided with a lower rectangular shutter blade driving gear, A rack plate base plate is fixedly arranged on the outer wall of the heat insulation cage, upper transmission teeth and lower transmission teeth are arranged at intervals along the vertical direction on the rack plate base plate, between the rack plate base plate and the An upper intermediate transmission gear is arranged between the upper rectangular louver blade driving gear, and the upper intermediate transmission gear meshes with the upper rectangular louver blade driving gear, and a lower intermediate transmission gear is arranged between the rack plate base plate and the lower rectangular louver blade driving gear , the lower intermediate transmission gear meshes with the lower rectangular louver blade driving gear; a high-temperature heat-absorbing coating is provided on the inner wall of the polysilicon ingot casting furnace

[0004] However, the crystal growth process is carried out sequentially from bottom to top. There is no good synchronous structure in the comparison document. During the process of moving the furnace chamber up, the ingot furnace should be cooled from bottom to top. Moreover, in the comparison document The louver structure provided has defects such as unreasonable design and high process requirements. In a high-temperature environment, it is difficult for the scheme described in the reference document to have good stability and durability

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