Reducing furnace control method and device

Abstract

The invention discsloses a reducing furnace control method which is used for controlling the current value of a heating silicon rod in a reducing furnace. The method comprises the following steps of: obtaining the current temperature of the silicon rod, the current value applied on the silicon rod and one target temperature value according to a preset sampling period; calculating the forecasting current values of a plurality of sampling periods between the current temperature value and the target temperature value through a preset current forecasting formula according to the obtained current temperature value, current value and target temperature value; outputting the current value of the sampling periods between the current temperature value and the target temperature value according to the forecasting current values to the silicon rod, wherein the current forecasting formula is shown in the specification. The reducing furnace control method has very good adaptability to various random and mutant complex uncertainties in the temperature adjustment. In addition, the invention also discloses an automation control device for the reducing furnace.

Description

technical field [0001] The invention relates to a reduction furnace control system, in particular to a reduction furnace control method and device. Background technique [0002] In existing polysilicon reduction furnaces, a temperature value is usually set in advance, and then the temperature of the silicon rods gradually reaches the set temperature value by adjusting the current of the power regulating cabinet. [0003] The control system of the polysilicon reduction furnace usually adjusts the current value applied to the silicon rod at each time according to the preset temperature change curve, so as to realize the gradual heating of the temperature of the silicon rod. However, this preset temperature change curve cannot be adjusted during the production process, so that it is impossible to comprehensively and effectively control temperature and current fluctuations caused by many uncertain factors in the process. It is difficult to ensure the stability of the whole prod...

AI Technical Summary

Problems solved by technology

However, this preset temperature change curve cannot be adjusted during the production process, so that it is impossible to fully and effectively control temperature and current fluctuations caused by many uncertain factors in the process.

It is difficult to ensure the stability of the whole production process, and it is easy to cause cracked rods, broken rods, and midway shutdown, resulting in high power consumption and low output.

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