Gas type roller hearth furnace temperature control method and device

Abstract

The present invention discloses a gas type roller hearth furnace temperature control method and device, belongs to the field of roller hearth furnace temperature control method and device, and aims to solve the problems of poor controlling accuracy and the like of the method in the prior art; the gas type roller hearth furnace temperature control method is as follows: using a control unit for unified control of combustion, extinguishing, and the combustion duration time of all burners; and the gas type roller hearth furnace temperature control device includes a plurality of temperature sensors distributed in a fired gas roller hearth furnace, intelligent temperature control instruments connected with the temperature sensors, a PLC connected with the intelligent temperature control instruments, and an industrial personal computer connected with the PLC, and also includes burner control units arranged between each burner and the PLC. The gas type roller hearth furnace temperature control method and device innovatively bring forward the idea of overall control of the burners, the control method is simpler and smarter, temperature control precision is higher, and the gas type roller hearth furnace temperature control method and device are more saving energy, improve the quality of the gas roller hearth furnace, and are more universal.

Description

technical field [0001] The invention relates to the field of temperature control methods and devices for roller hearth furnaces, in particular to a temperature control method for gas-fired roller hearth furnaces and a temperature control device for gas-fired roller hearth furnaces for realizing the temperature control method. Background technique [0002] Roller hearth furnace is the most commonly used equipment in the steel plate heat treatment process, and whether its temperature control is accurate will directly affect the quality of the heat treated steel plate. At present, the roller hearth furnace mostly adopts the gas method to heat treat the steel plate. There are many factors that affect the furnace temperature of the gas-fired roller hearth furnace, mainly including the structure of the furnace body, the insulation and sealing performance of the furnace body, the distribution position of the heat source, the pressure and calorific value of the gas, the arrangement ...

AI Technical Summary

Problems solved by technology

The defect of this method is: 1, the temperature control module of PLC is a kind of general-purpose PID control module, its PID parameter tuning is difficult, manual intervention is many, it is difficult to optimize control performance; The mode achieves perfect coordination; 3. The flame temperature of the burner is mostly higher than the process setting temperature, and it is difficult to solve the coupling problem between the burner and the temperature measurement point

The above defects lead to the unsatisfactory temperature control effect of the roller hearth furnace, poor temperature control accuracy, and insignificant energy saving effect

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