A gas heating furnace main pipe and branch pipe flow matching optimization control device and method

Abstract

The invention relates to the technical field of heating furnace temperature control, and provides a gas heating furnace main pipe and branch pipe flow matching optimization control device and method. The device and method perform parameter setting through the parameter setting module, realize the information collection of the heating furnace through the information collection module, and calculate the actual opening of the main valve and each branch valve through the double closed-loop control module that matches the temperature of the main valve and the branch valve with different control periods , through the main valve and branch valve opening dynamic limit setting module, set the corresponding dynamic limit value, and obtain the final control value of the main valve and the final control value of each branch valve in the double closed-loop control outer loop control cycle matching with different control cycles . The post-main valve pressure stabilization control module obtains the compensation control signal quantity of the next inner loop control period of the main valve opening. The final control quantity of the main valve, the final control quantity of each branch valve and the compensation control signal quantity of the next inner loop control cycle of the main valve opening are sent to each valve according to the corresponding period through the control quantity delivery module, so that the cycle is controlled.

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...

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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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