RU1806310C - Method and device for cleaning flue gases - Google Patents

Abstract

SUMMARY OF THE INVENTION: A trap consisting of a cylindrical metal shell is mounted at the end of the pipe. Inside the shell there are intake windows of the loop scrubbers. Scrubbers are located on a pipe section in a circle. Under the trap is a multi-blade spiral flow swirl. Hot gas rising in the pipe and bypassing the guide plates begins to rotate around the axis of the pipe. The solids are pushed to the periphery of the stream. Pure gas escapes from the flow sweeper into the atmosphere, 8-10% of flue gases with impurities enter the scrubbers, where they are directed down to the catch plates. 2 s.p. f-ly, 1 ill.

Description

The invention relates to the field of building materials industry and can be used to clean air emissions from pipes of cement plants or a number of calcining workshops.

An object of the present invention is to increase efficiency and save energy.

The gas purification method is carried out in the device shown in the drawing,

At the end of the pipe 1, a trap is installed, consisting of a metal cylindrical shell 2, lowered by the lower part into the pipe from above. Inside the shell, a pipe 3 is inserted and welded by disassembling to the shell to a third of its height from the bottom, separating the peripheral cylindrical smoke layer with inclusions from the central clean stream. In this part of the shell 2 there are intake windows 4 of the loop scrubbers 5. The scrubbers are located on the pipe section 1 along the circumference of the net and the gas passed through them

returns to the general flow through the outlet windows 6. Inside the scrubbers 5, there are catch plates 7 in the lower part and a reflector plate 8 in the upper part. Outside the scrubbers have a discharge pipe

9. Outlets 9 are grouped in estrus

10. transporting dust particles by gravity to the collector 11. The multi-blade spiral swirl of flow 12 is located directly below the trap (except for cases of disposal of especially harmful particles when there is a centrifugal impeller with electric drive between them), the guide plates 13 are located below the swirl.

The operation of the device according to this method consists in the fact that hot gas rising in the pipe and bypassing the guide plates 13 starts to rotate around the axis of the pipe, so that all solid inclusions are pushed to the periphery of the stream, and the central part of the stream is cleaned of them. End (L

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there is a process of concentration of inclusions in the peripheral zone of the gas stream already in the multi-vane 3 ° vortex swirl 12, from which pure gas flows directly into the atmosphere, and 8-10% of the flue gases together with pollution enter through the intake windows A of the scrubber chamber 5 where they are directed downwardly onto the catch plates 7 and are simultaneously cooled along the entire travel path. On the plates 7, the total flow stops and the gas loses speed, as it sharply changes its direction from bottom to top and exits, bypassing the reflection plate 8 through the exit windows 6 of a larger cross section than the intake windows 4. All heavy inclusions, lost in speed get stuck on the plates 8 and then through the bypass pipes flow along the estrus 10 into the collector 11,

Separation of particles due to rotation in the pipe leads to a significant decrease in

the volume of gas with contaminants that need to be cleaned in scrubbers, and therefore to reduce the size of the scrubbers themselves, which made it possible to install them on the upper part of the pipe., not particularly loading it with additional weight and not increasing the wind load too much. It is practically possible to carry out scrubbers and the entire trap in the outer dimensions of a brick chimney. . -

The economic efficiency of the method consists in the fact that it is possible now, even by mechanical

services of factories, to make catchers and not only to utilize many tons of cement or other products, but also to protect the air environment from pollution and to protect people from diseases. The simplicity and cost-effectiveness of the method are obvious. It is economical to operate.

Claims (2)

1. A method of cleaning flue gases by swirling the stream of the latter and then separating the finely divided component from the peripheral stream, characterized in that, in order to increase the efficiency of cleaning and saving energy, the swirling of the flue gas stream is carried out in the chimney, and the peripheral stream is cleaned dry scrubbers at the exit of the chimney. 2. A device for cleaning flue gases, comprising a casing and a gas flow swirl located at its center, characterized in that, in order to increase cleaning efficiency and save energy, it is equipped with loop dry scrubbers placed outside the circumference of the casing, the outlet openings of which are larger than the inlet openings and are located on the housing, while the swirl is made in the form of a spiral multi-vane cone directed by the apex towards the gas flow.