Automatic control method for cool-constant-temperature ore discharging of sinter ore furnace

Abstract

An automatic control method for the cool-constant-temperature ore discharging of a sinter ore furnace comprises the steps of crushing sinter ore discharged from a sintering machine through a crushing device, screening the crushed sinter ore through a screening device, transporting the sinter ore into a cooling furnace through a sinter ore transportation device for cooling, and discharging the sinter ore outside the cooling furnace through a discharging device. When the sinter ore is cooled and discharged, a temperature detection device detects ore discharging temperature, and by adjusting the air quantity of an induced draft fan and a blowing fan, the ore discharging temperature is adjusted and stabilized at 90-200 DEG C. According to the automatic control method for the cool-constant-temperature ore discharging of the sinter ore furnace, the ventilation quantities and the air temperature of the fans can be adjusted according to the feedforward of the air temperature and the ore temperature of an air outlet, so that the ore discharging temperature, the waste heat air temperature and the waste heat air quantity can be controlled within certain ranges, the waste heat utilization system can be guaranteed to operate normally, and the normal ore discharging can be guaranteed; and overhigh or overlow ore discharging temperature can be prevented, the stable operation can be achieved, and the sinter ore quality can be enhanced.

Description

technical field [0001] The invention relates to the technical field of waste heat utilization, in particular to an automatic control method for cold-fixed-temperature discharge of ore in a sinter furnace. Background technique [0002] The iron and steel industry is an important basic industry of the national economy, and its energy consumption accounts for about 15% of the total industrial energy consumption in the country. It is a key industry for energy conservation and emission reduction. In the process of iron and steel production, the energy consumption of the sintering process is relatively high, generally 10-15% of the total energy consumption of iron and steel enterprises. At present, the sinter is cooled by using the air medium through the belt cooler or the ring cooler. During the cooling process of the sinter, the heat energy becomes the sensible heat of the waste gas, and the temperature of the waste gas is between 100-400°C. In the total energy consumption of t...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned technical problems, to provide a kind of automatic control method for the ore discharge of the sintering furnace cold constant temperature, in the present invention, the ventilation rate of the blower fan, the feed-forward adjustment of the mine temperature through the air outlet air temperature Wind temperature, so as to control the ore discharge temperature, waste heat air temperature, and waste heat air volume within a certain range, ensure the normal operation of the waste heat utilization system, and ensure normal ore discharge. Using this control method, it is possible to prevent excessive ore discharge temperature in advance. High or too low, to achieve stable operation and improve the quality of sinter

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