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Mixed gas calorific value stabilization control method

A stable control method and mixed gas technology, applied in controllers with specific characteristics, combustion methods, controlled combustion, etc., can solve problems affecting the heating quality of the billet in the heating furnace, and achieve resource saving, accurate calorific value, and benefit improvement. Effect

Inactive Publication Date: 2009-07-15
ANGANG STEEL CO LTD
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Problems solved by technology

At the same time, it also seriously affects the heating quality of the heating furnace billet

Method used

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  • Mixed gas calorific value stabilization control method
  • Mixed gas calorific value stabilization control method

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Embodiment Construction

[0011] In order to timely and effectively control and adjust the calorific value and pressure of the mixed gas, the method of the present invention uses a calorific value meter to perform feedforward adjustment and feedback compensation adjustment control on the calorific value of the mixed gas.

[0012] A stable control method for the calorific value of mixed gas, characterized in that: the measured calorific value of blast furnace, coke oven, converter gas, the set value of the calorific value of mixed gas and various gas input quantities are used as the input of the feedforward regulation control loop Parameters, the required coke oven gas flow rate is calculated by the energy balance formula; after feed-forward adjustment, when the calorific value of the mixed gas still does not reach the set value, the measured calorific value of the mixed gas and the calorific value of the mixed gas are set The difference between the fixed values ​​is used as the input parameter of the fe...

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Abstract

The invention relates to a control method for stabilizing the mixed gas heat value, the method comprises steps that: actual measuring heat values of blast furnace, coke oven and converter gas and the setting values of mixed gas heat values and various gas input amounts are taken as input parameters of a feedforward adjustment control loop, the required coke oven gas flows can be calculated by an energy balance formula; after feedforward adjustment, under the condition that the mixed gas heat value is not still to reach to the setting value, the difference value of the mixed gas actual measuring heat values and the setting values of the mixed gas heat value is taken as the input parameters of a feedback compensation adjustment, the difference value can be adjusted by the PID regulator to implement the compensation adjusting control; finally the coke oven gas flow output can be adjusted by the PID regulator. The invention can effectively control and adjust the mixed gas heat values and greatly improve the heating quality of the heating furnace steel billet.

Description

technical field [0001] The invention relates to a calorific value control method, in particular to a stable control method for the calorific value of mixed gas. Background technique [0002] At present, the heating and combustion gas of heating furnaces in some large rolling mills is composed of more than two types of gas. In addition to coke oven and blast furnace gas, there may be converter gas, etc. Some pipe network pressure fluctuations are large, resulting in The calorific value of mixed gas changes greatly and frequently. Such a change in the calorific value of the mixed gas is a major obstacle for the heating furnace to realize the automatic adjustment of the heating and combustion process and the modeling of the furnace temperature setting value. Simultaneously, also had a strong impact on the heating quality of heating furnace billet. Every year, it brings great economic losses to the enterprise in terms of energy consumption, billet oxidation and burning loss, a...

Claims

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Application Information

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IPC IPC(8): G05B11/42F23N1/00
Inventor 梁会云徐春柏范小元曲刚石勇李波张国军张生刚王守权崔百丁
Owner ANGANG STEEL CO LTD
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