Method for controlling combustion atmosphere in large-scale walking beam type plate blank heating furnace

Abstract

The invention relates to a method for controlling combustion atmosphere in a large-scale walking beam type plate blank heating furnace, which belongs to the technical field of fuel combustion of industrial furnaces. A plate blank is heated through a preheating section, each heating section and a soaking section to finish the process of heating and temperature equilibrium; and in the process, a first-level computer control system and a second-level computer control system automatically generate a heating process and automatically set and control the furnace temperature in each section according to original data of the plate blank called from a database; and on the basis of an output control value of a residual oxygen analyzer, the computer control systems calculate the air consumption coefficient of each combustion area, perform dynamic track on the combustion atmosphere in the whole furnace along with the changes of thermal loads, correct the combustion atmosphere according to the actual air-fuel ratio of six combustion areas, adjust the proportion of combustion air and gas, and determine the reasonable air and gas flow to achieve the furnace temperature required by the heating process. The method has the advantages that the condition of furnace gas component changes in the furnace is quantificationally provided for a heating furnace operator in time, so that the combustion in the heating furnace reaches good state; and simultaneously, the energy-saving and environmental protection effects are remarkable.

Description

technical field [0001] The invention belongs to the technical field of industrial furnace fuel combustion, and in particular provides a method for controlling the combustion atmosphere of a large-scale walking beam type slab heating furnace, which is applied to the combustion control of a wide-thick slab heating furnace, saves a lot of energy, and simultaneously improves the heating of steel slabs. Quality, reduce billet oxidation burning loss. Background technique [0002] With the rapid development of wide and thick plate production, the upgrading of products and process equipment is also relatively fast, and the production of high value-added steel plate has higher and higher requirements for the heating process of the heating furnace. The requirements for the level of combustion control in the furnace are also constantly increasing. At present, the heating furnace combustion control system is mainly composed of control devices such as air-fuel ratio, air, and gas flow. ...

AI Technical Summary

Problems solved by technology

In actual operation, the heating furnace is in a good combustion state by controlling the air-fuel ratio and adjusting the air and gas flow accordingly. The combustion atmosphere monitoring system in the heating furnace has not yet been established.

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