Method for controlling furnace pressure of heating furnace with dual flues

Abstract

The invention discloses a method for controlling the furnace pressure of a heating furnace with dual flues. In the method, a flue damper electric executer on one side of the heating furnace is controlled according to a furnace pressure signal to control the opening of a flue shutter on one side of the heating furnace, and the flue damper electric executer on the other side of the heating furnace is controlled according to the furnace pressure signal obtained by compensating the furnace pressure signal with temperature difference signals of heat exchangers in the flues on the two sides of the heating furnace to control the opening of the flue shutter on the other side of the heating furnace, so that differential control over the opening of the flue shutters on the two sides of the heating furnace is realized to further effectively control the furnace pressure and ensure the heating quality of billets.

Description

technical field [0001] The invention relates to the field of furnace control. More specifically, the present invention relates to a method for differentially controlling furnace pressure in a two-flue heating furnace. Background technique [0002] In the field of metallurgy, the heating furnace is a large-scale key equipment used before the billet enters hot rolling. Meet rolling requirements. During the operation of the heating furnace, various factors need to be controlled, among which, the control of the furnace pressure of the heating furnace is very important. [0003] When the pressure of the furnace is too high, the flame will be ejected from the furnace; when the pressure of the furnace is too low, the furnace will suck a lot of cold air. Therefore, in order to prevent the cold wind from pouring back and the flame from being sprayed out of the furnace, a slight positive pressure should be maintained in the furnace of the heating furnace. When the heating furnace ...

AI Technical Summary

Problems solved by technology

However, when the heating furnace has two flues to exhaust smoke, due to the difference in the structure of the two flues, the draft force of the two flues is uneven. When the electric actuators in the two flues are synchronously adjusted, the furnace The pressure cannot be effectively controlled, which not only increases the heat consumption of the heating furnace and pollutes the environment, but also cannot guarantee the heating quality of the billet, which seriously affects the production

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