Plasma flying ash melting furnace hearth temperature control method and control system

Abstract

The invention provides a plasma flying ash melting furnace hearth temperature control method and control system. The control method comprises the steps of measuring hearth temperature value of a plasma flying ash melting furnace through a detection device; according to the hearth temperature value, calculating input value of fuzzy control; comparing the input value of fuzzy control with set valuein a fuzzy control domain so as to calculate output value of fuzzy control, wherein domain distribution of the fuzzy control domain has exponential form divergence; and inputting output value of fuzzycontrol to a PID controller so as to control the hearth temperature. According to the plasma flying ash melting furnace hearth temperature control method and control system, through combination of fuzzy control and PID control, domain distribution of the fuzzy control domain has exponential form divergence, under the condition that the section of the fuzzy domain is not changed, the calculation amount is reduced, and the system efficiency is improved.

Description

technical field [0001] The invention relates to the field of hazardous waste treatment, in particular to a furnace temperature control method and control system for a plasma fly ash melting furnace. Background technique [0002] During the incineration of hazardous waste, a large amount of fly ash will be produced, which contains high leaching concentrations of heavy metals, dioxins and other pollutants. At present, the high temperature generated by the plasma fly ash melting furnace quickly turns fly ash into a molten state, which is a technology for harmless treatment and resource utilization of domestic waste incineration fly ash. [0003] However, the furnace temperature control of plasma fly ash melting furnace is a typical complex process with large inertia, large lag, nonlinearity and time-varying nature, and it is difficult to establish an accurate mathematical model by mathematical methods. At present, in the control of industrial systems, PID control and fuzzy con...

AI Technical Summary

Problems solved by technology

For the complex system of strongly coupled multi-input / multi-output nonlinear temperature control of plasma fly ash melting furnace, the whole process is dynamic and changes with the change of working conditions, and there are nonlinear, time-varying and large inertia and large hysteresis and many other uncertain factors, which cannot be described by an accurate model

Therefore, only using traditional PID control or fuzzy control adjustment can not obtain good control effect in actual operation.

Images