Differential-pressure-free dust discharging device of blast furnace gravity dust collector

Abstract

The invention belongs to a dust discharging device and particularly discloses a differential-pressure-free dust discharging device of a blast furnace gravity dust collector. The differential-pressure-free dust discharging device comprises a gravity dust collector body, a grounded dust bin and a dust discharging valve, wherein the dust discharging valve comprises an upper dust discharging valve and a lower dust discharging valve, a middle dust bin is arranged between the gravity dust collector body and the grounded dust bin, the upper dust discharging valve is arranged between the gravity dust collector body and the middle dust bin, the lower dust discharging valve is arranged between the middle dust bin and the grounded dust bin, a pressure equalizing pipeline is arranged between the gravity dust collector body and the middle dust bin, a pressure equalizing valve is arranged on the pressure equalizing pipeline, a diffusing pipeline is arranged between the middle dust bin and the grounded dust bin, and a diffusing valve is arranged on the diffusing pipeline. The differential-pressure-free dust discharging device of the blast furnace gravity dust collector has the advantages that by means of a two-stage dust discharging method, dust discharging differential pressure is eliminated, a gas flow velocity is substantially reduced, the abrasion of the dust discharging valve is substantially reduced, secondary dust raising pollution can be avoided during a dust discharging process, gas leakage can be reduced, safety hazards of operators can be reduced, power consumption of dust discharging machines can be reduced, and the like.

Description

technical field [0001] The invention relates to an ash-releasing device, in particular to a non-pressure-difference ash-releasing device for a blast furnace gravity dust collector in the iron and steel metallurgy industry. Background technique [0002] During the normal production process of the blast furnace, the raw coal gas formed contains a large amount of dust. These solid ash must be effectively collected and discharged. The primary collection device for the blast furnace dust is the blast furnace gravity dust collector. The gravity dust collector has a simple structure and high dust removal efficiency. Excellent performance, small resistance loss and other characteristics, the gravity dust collector is widely used in the dust removal system of blast furnace gas, and the dust removal efficiency can reach 80%. The amount of ash discharged through the gravity dust collector generally reaches about 16kg per ton of iron. According to the ironmaking production process, the...

AI Technical Summary

Problems solved by technology

Generally, dust will be formed during the discharge process, especially the pressure difference between the inside and outside of the gravity dust collector is large, and the flow rate during discharge is relatively high. First, it is easier to form dust, and second, it is easy to cause wear on the ash discharge valve. The method of raising dust is to humidify the dust through the humidification and unloading machine. However, due to the existence of the pressure difference between the inside and outside of the gravity dust collector, it is still impossible to completely control the dust and secondary pollution, and the process of dust removal is accompanied by gas emissions, which directly affects the health of employees in iron and steel enterprises. physical and mental health

Currently, there is no good solution

Images