Flow matching optimization control device and method for main pipe and branch pipes of gas heating furnace

Abstract

The invention relates to the technical field of temperature control of a heating furnace, and provides a flow matching optimization control device and method for a main pipe and branch pipes of a gasheating furnace. The device and method carry out parameter setting through a parameter setting module, realize information acquisition of the heating furnace through an information acquisition module,calculate the actual opening degrees of a main valve and each branch valve through a different control period-matched double closed loop control module of the temperatures of the main valve and the branch valves, and set corresponding dynamic limiting degree value through a main valve and branch valve opening degree dynamic limiting degree setting module to obtain the final control amount of themain valve and the final control amount of each branch valve of a different control period-matched double closed loop control outer loop; a pressure stabilizing control module after the main valve obtains the next inner loop control period compensation control signal amount of the opening degree of the main valve; and the final control amount of the main valve, the final control amount of each branch valve and the next inner loop control period compensation control signal amount of the opening degree of the main valve are distributed to the valves according to the corresponding periods througha control amount distribution module, so that the period control is carried out.

Description

technical field [0001] The invention relates to the technical field of heating furnace temperature control, in particular to a flow matching optimization control device and method for a main pipe and a branch pipe of a gas heating furnace. Background technique [0002] During the temperature control process of the heating furnace, there is a heating up stage and a holding stage. In the heating stage, the furnace temperature needs to be gradually raised following the planned temperature rise. In the holding stage, the furnace temperature needs to be maintained at the current temperature. At the same time, pressure fluctuations and other disturbances affect the flow in both the heating up phase and the holding phase, resulting in an impact on the furnace temperature. The gas pipeline is divided into the main pipeline and each branch pipeline. The main pipeline controls the pipeline flow of the entire heating furnace, and the branch pipeline flow is a shunt flow of the main pip...

AI Technical Summary

Problems solved by technology

The problem with this adjustment method is that since different furnace temperature regions have different working conditions, the temperature uniformity of the entire furnace cannot be directly related to the control of each valve; in this control method, the valve opening The limiting setting is set based on field experience. The limiting setting range cannot be dynamically adjusted according to the heating curve, which will definitely cause problems such as too long adjustment time of temperature control and temperature oscillation; when adjusting a branch valve, it will The pressure change behind the main valve will affect the flow fluctuation of other branch valves. Although a certain control purpose can be achieved, the control accuracy cannot be guaranteed, and the problem of interference coupling between branch valve flows cannot be solved.

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