Method for controlling pressure of blast furnace top by adopting gas dry dust removing device

Abstract

The invention provides a method for controlling the pressure of a blast furnace top by adopting a gas dry dust removing device, which comprises the step of controlling the pressure of the furnace top respectively through a TRT (Top Gas Pressure Recovery Turbine) stationary blade / quick-opening regulating valve set, a TRT system, or a raw gas pressure reducing valve set, a gas emission tower, or a clean gas pressure reducing valve set and a clean gas pipe network; and the method also comprises the automatic switching process of a furnace top pressure control right from the TRT stationary blade / quick-opening regulating valve set to the clean gas pressure reducing valve set, the automatic switching process from the TRT stationary blade / quick-opening regulating valve set to the raw gas pressure reducing valve set, the automatic switching process from the clean gas pressure reducing valve set to the TRT stationary blade / quick-opening regulating valve set, the automatic switching process from the clean gas pressure reducing valve set to the raw gas pressure reducing valve set, the automatic switching process from the raw gas pressure reducing valve set to the clean gas pressure reducing valve set and the automatic switching process from the raw gas pressure reducing valve set to the TRT stationary blade / quick-opening regulating valve set.

Description

technical field [0001] The invention relates to a method for removing dust from blast furnace ironmaking gas using a dry cloth bag process, in particular to three sets of devices, namely, a crude gas pressure reducing valve group, a clean gas pressure reducing valve group and a TRT (blast furnace gas residual pressure turbine power generation device). pressure control methods. Background technique [0002] The large-scale blast furnace gas full-dry bag dust removal technology is an emerging environmental protection dust removal technology for blast furnace ironmaking. Compared with wet dust removal, dry bag dust removal has the advantages of basically no water use, no water pollution, low energy consumption, and low operating costs. It is an environmental protection and energy-saving project with significant economic and social benefits. It is currently a key promotion in the national steel industry. It is the first of the "three dry and one electricity" (blast furnace gas ...

AI Technical Summary

Problems solved by technology

[0004] At present, each blast furnace is basically switched manually, because the static vane / quick opening regulating valve and the rough / clean gas pressure reducing valve group of the TRT system are generally divided by two posts or even two factories (power energy plant and ironworks) Different positions are responsible for different positions, and there are often problems in operation coordination. The pressure on the top of the furnace fluctuates greatly, and the two positions often shuffle each other, which seriously affects the normal and stable production.

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