Intelligent control system of automatic optimizing combustion of hot-blast stove

Abstract

The invention provides an intelligent control system of an automatic optimizing combustion of a hot-blast stove, comprising a mixed gas flow regulator (FIC-101), a vault temperature regulator (TIC-101), a combustion-supporting air flow regulator (FIC-102), a heating load regulator (QX-102), a waste gas temperature regulator (TIC-102) and an air-fuel ratio fuzzy controller. The invention can improve the combustion control level of the hot-blast stove, has high combustion efficiency, fully utilizes energy and has strong energy storage capability.

Description

Technical field [0001] The invention is used for the combustion control of the hot blast stove system of the iron-making blast furnace in the metallurgical industry. Background technique [0002] The hot blast stove is an important supporting equipment in the blast furnace ironmaking production process. Its main function is to heat the blast to the required temperature and provide high temperature hot blast to the blast furnace. The blast furnace is generally supplied by 3 to 4 hot blast stoves alternately, and the working process of each hot blast stove is a repeated process of burning and blowing. After the gas and combustion air are mixed in the burner, they are burned in the combustion chamber to produce high-temperature flue gas. The checker brick of the regenerator is the carrier of heat transfer. It absorbs heat during combustion, and transfers heat to cold air during air supply, thereby heating the cold air. [0003] In order to save energy and realize the stable and opti...

AI Technical Summary

Problems solved by technology

The proportional extreme value adjustment method cannot change the air-fuel ratio in time when the calorific value of the gas changes, and it is not easy to achieve the best combustion of the hot blast stove

The flue gas oxygen content cascade proportional control method uses the ratio adjustment as a rough adjustment, and the oxygen content feedback control in the flue gas as a fine adjustment to control the air and gas volume. This method can achieve a more reasonable combustion of the hot blast stove, but Due to the limited life of the oxygen measuring instrument, coupled with inadequate management and maintenance, the oxygen measuring instrument of many enterprises cannot work stably for a long time. Therefore, the application effect of this method is not ideal.

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