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Smelting reduction furnace gas recycling device and method

A reduction furnace and coal gas technology, applied in waste gas treatment, climate sustainability, metal processing, etc., can solve the problems of furnace top gas recovery and utilization, high temperature, high calorific value, etc., and achieve low energy consumption, long service life, The effect of improving economic efficiency

Inactive Publication Date: 2020-01-10
内蒙古赛思普科技有限公司
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AI Technical Summary

Problems solved by technology

Compared with blast furnace ironmaking, the top gas produced by the direct smelting reduction process is between 1500 and 1700 °C, which has the characteristics of large gas volume, high calorific value, and high temperature, and there is a certain amount of smoke in the top gas. The recovery and utilization of top gas has brought great difficulties

Method used

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  • Smelting reduction furnace gas recycling device and method

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Embodiment 1

[0026] A smelting reduction furnace gas recycling system. The smelting reduction furnace gas recycling system includes: sequentially connected vaporization flue, cyclone dust collector, waste heat boiler, bag filter, and pressure regulating valve group. The outlets of the pressure regulating valve group are respectively It is connected with a coal powder preparation device, a hot blast stove, and a drying kiln, and the inlet of the vaporization flue is connected with a smelting reduction furnace.

[0027] The vaporization flue is divided into five parts, the furnace mouth section, the first section of the flue, the second section of the flue, the third section of the flue, and the fourth section of the flue. A hot water circulation pump is installed, which can realize forced cooling, and the last part is natural circulation, but it can also realize forced circulation vaporization cooling.

[0028] The cyclone dust collector adopts an upper cylinder and a lower cone structure. ...

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Abstract

The invention discloses a smelting reduction furnace gas recycling system. The smelting reduction furnace gas recycling system includes a gasification flue, a cyclone dust collector, a waste heat boiler, a bag-type dust remover, and a pressure regulating valve group, wherein the cyclone dust collector, the waste heat boiler, the bag-type dust remover, and the pressure regulating valve group are sequentially connected, the outlet of the pressure regulating valve group is connected with a pulverized coal preparation device, a hot blast stove, and a drying kiln respectively, and the inlet of thegasification flue is connected with a smelting reduction furnace. Internal recycling in the entire process is achieved, high-temperature gas physical sensible heat is fully utilized, chemical heat ofthe gas is fully released, the energy consumption of the whole process is greatly reduced, and the purpose of energy saving and consumption reduction is achieved.

Description

technical field [0001] The invention relates to a coal gas utilization process, in particular to a coal gas recycling process utilizing a smelting reduction furnace. Background technique [0002] Due to the high energy consumption and high emissions of the blast furnace ironmaking system, the metallurgical industry has been developing coke-free or low-coke non-blast furnace ironmaking processes for a long time. The direct smelting reduction ironmaking process can directly smelt preheated iron ore powder, and inject pulverized coal as the reducing agent and heat source of the system. Compared with the traditional blast furnace ironmaking process, the smelting reduction ironmaking process eliminates the two links of sintering and coking, and saves a lot of investment and operating costs under the same production capacity. A large amount of steam and surplus gas are generated in the production process to be utilized . Compared with blast furnace ironmaking, the top gas produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00
CPCC21B13/0006C21B2100/44C21B2100/66
Inventor 卜二军张志祥徐涛张勇周海川刘志国
Owner 内蒙古赛思普科技有限公司
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