Hot blast stove combustion control method and system

Abstract

The embodiment of the present invention discloses a combustion control method and system for a hot blast stove, wherein the method includes: obtaining in advance the vault temperature, valve opening and combustion control parameters of the hot blast stove during the combustion period; judging the vault temperature, valve opening and whether the combustion control parameters meet the optimal parameter instance conditions; if the optimal parameter instance conditions are met, then it is determined that the combustion control parameters are optimal combustion control parameters; and whether the average variation of the combustion control parameters at the current predetermined time is greater than or equal to the preset variation Whether the amount threshold, and / or the continuous drop time of the vault temperature within the current predetermined time reaches the predetermined time threshold; if so, adjust the valve opening to the valve corresponding to the best combustion control parameter with the smallest difference in the current predetermined time combustion control parameters opening. The technical scheme of the invention can timely and accurately adjust the air-fuel ratio of the hot blast stove, so that the gas of the hot blast stove can be fully burned, the temperature of the vault of the hot blast stove can be stabilized, and the utilization level of blast furnace air temperature can be improved.

Description

technical field [0001] The invention relates to the technical field of hot blast stoves, in particular to a combustion control method and system for hot blast stoves. Background technique [0002] The hot blast stove of the ironmaking blast furnace is an important device used to heat the wind to a predetermined temperature, and then transport the wind to the blast furnace to improve the smelting efficiency of the blast furnace. Usually, the hot blast stove generally works in accordance with the cycle of burning-stove-supply-stove-stove-combustion. The basic working principle of the hot blast stove is: during the combustion period of the hot blast stove, firstly heat the checker bricks in the regenerator of the hot blast stove , when the checker bricks in the regenerator are fully heated, the hot blast stove changes from the heat storage state to the air supply state. During the air supply period, the heat is transferred to the cold air, so that the cold air is heated into ho...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a hot blast stove combustion control method and system to solve the problem that it is difficult to find the best air-fuel ratio in the method of manually adjusting the hot blast stove firing process in the prior art, which leads to large fluctuations in the temperature of the vault and burns the furnace. Poor effect, gas waste problem

Images