Air bag type pressure regulating device for material feeding operation of high-pressure smelting furnace

Abstract

The invention relates to a pressure regulating device for the material feeding operation of a high-pressure smelting furnace in the field of iron and steel industry. The air bag type pressure regulating device for the material feeding operation of the high-pressure smelting furnace is characterized by comprising a pressure regulation stop valve, a pressure balancing device, an air bag, a nitrogenblow-off valve, a high-pressure nitrogen stop valve, a pressure balancing pipeline, a nitrogen blow-off pipe and a nitrogen pipe, wherein one end of the pressure balancing pipeline is communicated with the pressure regulation outlet of a material tank while the other end is communicated with a sealed pressure balancing device; the pressure regulating stop valve is arranged on the pressure balancing pipeline; the air bag is positioned in a cavity of the pressure balancing device and is communicated with one end of the nitrogen blow-off valve and one end of the nitrogen pipe outside the pressure balancing device through connecting ports; the nitrogen blow-off valve is arranged on the nitrogen blow-off pipe; the other end of the nitrogen pipe is communicated with a nitrogen source; and a high-pressure nitrogen stop valve is arranged on the nitrogen pipe. The device can fulfill the aim of zero emission of gas in a pressure regulation process; and the gas can be completely and circularly used inside without polluting environment.

Description

technical field [0001] The invention relates to a pressure regulating device used for charging high-pressure smelting furnaces in the iron and steel industry field. Background technique [0002] The development of the iron and steel industry requires process optimization from the entire production process to achieve energy saving and consumption reduction, meet increasingly stringent environmental protection requirements and brutal market competition, reduce costs, and improve the vitality of iron and steel products. Taking the blast furnace ironmaking process as an example, during the charging and discharging process of the blast furnace top equipment, the weighing material tank is completed under the alternating working procedures of pressure equalization and release. N 2 Pour into the weighing material tank, and after filling the material, the pressure equalizes to the same pressure as the blast furnace so as to discharge the material into the blast furnace; when releasi...

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Problems solved by technology

[0003] In the emerging non-blast furnace ironmaking technology, the charging pressure adjustment process similar to the current blast furnace is also adopted, which wastes a lot

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