Dedusting device and high-temperature gas dedusting system

Abstract

The invention discloses a dedusting device and a high temperature gas dedusting system. The dedusting device comprises a cylindrical shell (2). A partition plate (17), a filter component (4) and a blowing pipe (6) are arranged in the shell (2). Filter holes are formed in the side wall of the filter component (4). The blowing pipe (5) is located in an outlet cavity and is provided with blowing holes capable of blowing air to one end of the filter component (4). According to the dedusting device and the high temperature gas dedusting system, the filter component made from a high-temperature-resistant alloy material is used for dry dedusting of gas, so that the dust content of the gas is decreased to 5 mg / Nm<3> or below; the filter component made from the high-temperature-resistant alloy material is high in filter speed and can resist high temperature as high as 600-1000 DEG C. Sensible heat of dedusted high-temperature clean gas is sufficiently recovered by a waste heater boiler, and theclean gas is delivered to downstream users so as to be used after the heat of the clean gas is recovered.

Description

technical field [0001] The invention relates to the field of ironmaking auxiliary equipment, in particular to a dust removal device, and a gas high-temperature dust removal system including the dust removal device. Background technique [0002] The FINEX (a smelting reduction ironmaking process) new process is a smelting reduction process that uses iron ore powder and non-coking coal to produce molten iron. The iron ore powder is reduced into direct reduced iron through a multi-stage fluidized bed, and the direct reduced iron is hot pressed. into hot-pressed iron blocks, and then put into the melting furnace for melting to produce molten iron. [0003] The FINEX ironmaking process is different from the traditional blast furnace ironmaking process. It is a smelting reduction process that uses iron ore powder and non-coking coal to produce molten iron. The iron ore powder is reduced to direct reduced iron through a multi-stage fluidized bed, and the direct reduced iron is heat...

AI Technical Summary

Problems solved by technology

The existing wet dedusting process has been gradually eliminated by iron and steel plants due to its shortcomings such as high water consumption, high power consumption, and the inability to recover the sensible heat of gas.

However, the dry bag dust removal technology is not suitable for application in the FINEX ironmaking process due to its low temperature tolerance and difficulty in recovery of gas sensible heat.

Images