METHOD OF FURNACE TEMPERATURE CONTROL FOR FURNACE WITH DIRECT HEATING AND CONTROL DEVICE Russian patent published in 2015 - IPC F27D19/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy. Furnace temperature is measured to obtain feedback furnace temperature values. Difference between the furnace temperature set-point and feedback furnace temperature is calculated as noncompliance value DV₁. According to values of feedback furnace temperature and furnace temperature set-points the differences between the furnace temperature set-point and feedback furnace temperature are calculated per time unit (gradient). Gradient of furnace temperature change is determined as noncompliance value DV₂. Speed V of material movement in the furnace if determined by speed regulator, and first population of output components FF_V of straight delivery in accordance with speed V is obtained. Second population of the output components FF_T of straight delivery in accordance with difference between the furnace temperature set-point and values of feedback furnace temperature, i.e. DV₁ values is determined. PID control parameters in accordance with DV₁ and DV₂ are searched based on the control rule with fuzzy logic, and regulating parameter OP₁ if control in accordance with PID control parameter is formed. Valve regulating flow of coal gas and valve regulating air flow are controlled by combination if the regulating parameter OP₁ of control with the first population of components FF_V of direct delivery, and second population of components FF_T of direct delivery.

EFFECT: increased accuracy of furnace temperature maintenance.

2 cl, 3 dwg, 5 tbl