Blast furnace gas injection control system and control method

Abstract

The invention discloses a blast furnace gas injection control system and method, the blast furnace gas injection control system comprises a coke oven gas pipeline, a decarburized gas pipeline, a protective nitrogen pipeline and a main gas pipeline, the coke oven gas pipeline and the decarburized gas pipeline are communicated with the main gas pipeline, and the main gas pipeline distributes a branch pipe to a nozzle of a blast furnace gas nozzle; the protective nitrogen pipeline is communicated with the main gas pipeline, and the pipelines detect the running states of the pipelines through the combined measuring points and control the running states of the pipelines through the regulation and control valve group; the safe and efficient control method for the tuyere blowing gas is designed to deal with normal and abnormal operation after the tuyere blowing gas, a system after the blast furnace tuyere blowing coke oven gas can be normally put into operation, the tuyere blowing coke oven gas system can safely exit operation under the abnormal condition, and the system safety is ensured.

Description

technical field [0001] The invention relates to blast furnace gas injection technology, in particular to a blast furnace gas injection control system and control method. Background technique [0002] Since CO2 emissions from the iron and steel industry account for more than 15% of the total emissions, iron and steel enterprises will be under enormous pressure to reduce carbon emissions for a long time. At present, the amount of CO2 in ironmaking gas accounts for about 70% of the total amount of CO2 in iron and steel production. Therefore, the ironmaking process is the core link of steel production to reduce CO2 emissions. Traditional blast furnaces generally adopt the tuyere coal injection technology, and the smelting goal of achieving low-carbon and environmental protection by injecting gas through the tuyere has been put on the iron and steel industry’s energy-saving and emission-reduction agenda. However, due to The flammability, explosiveness and toxicity of gas determi...

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Problems solved by technology

Therefore, the ironmaking process is the core link of steel production to reduce CO2 emissions. Traditional blast furnaces generally adopt the tuyere coal injection technology, and the smelting goal of achieving low-carbon and environmental protection by injecting gas through the tuyere has been put on the iron and steel industry’s energy-saving and emission-reduction agenda. However, due to The flammability, explosiveness and toxicity of gas determine that the gas injection at the tuyere must consider and solve the problem of safe operation

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