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Energy-saving and consumption-reducing method for air supply system of metallurgy blast furnace

An air supply system and blast furnace technology, applied in the field of metallurgical blast furnaces, can solve problems such as high energy consumption and complex equipment, and achieve the effects of reducing emissions, reducing thermal pollution, and saving operating management costs

Inactive Publication Date: 2014-07-23
JIANGSU HUANGMING ENERGY TECH +1
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of high energy consumption and complicated equipment in the prior art, save expensive refrigeration process equipment and its corresponding energy consumption, and use the waste heat of the discharged slag flushing water to regenerate the dehumidification runner and heat the air , to provide a new process method for metallurgical blast furnace air supply system

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[0029] Basic situation: one 500 cubic meter blast furnace, slag flushing water temperature 85-90 ℃, 160 tons / hour;

[0030] Preheating air volume: 75,000 cubic meters to 90,000 cubic meters per hour.

[0031] Blast furnace slag flushing water is recycled industrial cooling water, and the hot water for slag removal needs to be cooled to 60°C through the cooling water tower before being recycled, resulting in a large amount of waste heat being discharged into the atmosphere. Calculated according to the temperature drop and flow rate of the slag washing water, the waste heat discharged into the atmosphere is (calculated at 90°C):

[0032] Q=160×1000×(90-60)=4.8 million kcal / hour (about 5600kWh)

[0033] Due to the limitation of the temperature of the slag washing water, the air waste heat temperature can reach up to 80°C. For the calculation of the air waste heat of a 500 cubic blast furnace (calculated at 90,000 cubic meters per hour), the required air preheating heat is calcul...

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Abstract

The invention discloses an energy-saving and consumption-reducing method for an air supply system of a metallurgy blast furnace. Processing air is delivered into a rotary dehumidifier through an air filter for air dehumidifying, required regenerating wind of the rotary dehumidifier is heated to above 60 DEG C while residual heat of slag washing water of the blast furnace is used as a heat source, the processing air is heated from ambient temperature to less than 50 DEG C at the same time, and cooled slag washing water is reused in blast furnace slag washing process for cyclic utilization. The processing air is further heated to 1200 DEG C through a preheater I, a blower, a preheater II and a hot-blast stove and sent to the metallurgy blast furnace. The method of the invention fully utilizes the residual heat of the originally discharged slag washing water, decreases discharge of the residual heat of the slag washing water, and reduces thermal pollution to environment. Cooling equipment of a cooling tower is canceled while rotary dehumidifying equipment replaces original cooling dehumidifying system, thereby realizing energy saving and consumption reduction for the air supply system of the blast furnace and achieving dual objectives of energy saving and emission reduction.

Description

technical field [0001] The invention relates to a metallurgical blast furnace, in particular to an air supply system for the metallurgical blast furnace. Background technique [0002] At present, the metallurgical blast furnace is a high-energy-consuming equipment produced in the metallurgical field. The fuel combustion of the blast furnace requires an air supply system, that is, an air dehumidification and preheating system. This system has great energy-saving potential. [0003] The traditional method of blast furnace air dehumidification and preheating system is to use refrigeration technology to cool down the air, and cool the ambient air to 5-10°C according to the requirements of the dehumidification degree, so that the moisture in the air can be condensed and precipitated under low temperature conditions, and then use minerals It can heat up the air temperature to obtain dry preheated air, and then heat up and compress the dehumidified air and send it to the blast furn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B9/00C21B9/16C21B5/00C21B3/08
CPCC21B2400/024C21B2400/032C21B2400/074C21B2400/08Y02P10/20
Inventor 王筱林张于峰
Owner JIANGSU HUANGMING ENERGY TECH
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