Method and device for regulating temperature of hearth of ternary ignition furnace

Abstract

The invention discloses a method and device for regulating the temperature of a hearth of a ternary ignition furnace, and relates to the technical field of sintering and ignition. The method includes the steps of firstly, obtaining current state parameters of the ternary ignition furnace and preset parameters; secondly, calculating the target flow of coal gas which needs to enter the hearth of the ternary ignition furnace through a thermal engineering mathematical model according to the current state parameters and the preset parameters; thirdly, conducting flow closed-loop control on a coal gas regulating valve of the ternary ignition furnace according to the calculated target flow of the coal gas so that the regulation of the temperature of the hearth of the ternary ignition furnace can be achieved, wherein the preset parameters include a preset target temperature of the hearth of the ternary ignition furnace. According to the method and device, the target flow of the coal gas which needs to enter the hearth so as to enable the temperature of the hearth of the ternary ignition furnace to reach the preset target temperature is calculated through the thermal engineering mathematical model, only the closed-loop control needs to be directly conducted on the flow of the coal gas, and therefore the response time for enabling the temperature of the hearth to reach the preset target temperature is shortened, and the hysteresis is reduced.

Description

technical field [0001] The invention relates to the technical field of sintering ignition, in particular to a method and device for adjusting the temperature of a three-way ignition furnace hearth. Background technique [0002] The sintering process is an important link in the smelting technology, which is used to sinter the powdery mixed raw materials or mixed materials that are not easy to smelt into sintered ore that is easy to smelt. Ignition is a very important link in the sintering process. The sintering process begins with the ignition of the solid fuel on the surface of the mixture. After the mixed sintering raw materials are evenly distributed on the trolley, the high-temperature ribbon flame provided by the ignition furnace heats the surface of the sintering raw material to a temperature higher than the ignition point of the solid fuel and starts to burn. , and then the exhaust fan provides sufficient oxygen and promotes the sintering process to proceed rapidly do...

AI Technical Summary

Problems solved by technology

[0018] To sum up, the current methods for adjusting the temperature of the ignition furnace all need to compare the measured value and the set value of the furnace temperature multiple times, and continuously change the opening of the gas flow regulating valve through PID control valve or fuzzy control, so that the actual temperature of the furnace The temperature is constantly approaching the target set temperature, but it will cause frequent actions of the regulating valve, the response time for the furnace temperature to reach the set temperature is too long, and the hysteresis is too large. Therefore, in order to maintain the stability of the control in actual use, flow The control method is to directly set the target flow rate of the flow regulating valve. When the production is unstable, it is necessary to manually adjust the gas target flow rate frequently, thereby increasing the labor intensity of the operator, and even affecting the output and quality of sintered ore.

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