SU1337124A1 - Apparatus for wet cleaning of gas from dust - Google Patents

Abstract

The invention relates to gas cleaning devices and solves the problem of improving the quality of cleaning, simplifying the design and reducing energy consumption. The device comprises a housing 1 with a vertical pipe 2 provided at the lower end with perforations 7 and a bellows 10 with helical corrugations 11 and a float 12 with helical grooves in the lower part, as well as a diffuser 3 attached to the partition 9 in the form of a truncated cone. In the upper part of the pipe, the distributor 4 is fixed in the form of nozzles 8, and an annular chamber 6 is disposed from the outer part. When the device is operating, the gas is wetted by the nozzles 3 to form a film movement of the liquid on the inner and outer parts of the pipe, the gas swirls in the bellows 10, falls under the float 12, when exiting from the float, abruptly changes its direction and rises up through the diffuser. When moving along the grooves of the float 12, the gas is in intensive contact with the surface of the liquid, and the float oscillates, improving the gas wetting condition. 1 hp f-ly, 4 ill. "(L 13 with with to 79

Description

The invention relates to devices for wet scrubbing of dust from air or its mixture with other gases before being released into the atmosphere.

The purpose of the invention is to improve the quality of gas cleaning, simplify the design and reduce energy consumption.

FIG. 1 shows a diagram of the device, a general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 shows the node I in FIG. one; in fig. 4 is a section BB in FIG. 3

The device comprises a housing 1 with a vertical pipe 2 for introducing a dusty gas, a diffuser 3, a liquid distributor 4, a gas outlet pipe 5 and an outer annular chamber 6. The lower part of the housing is filled with liquid.

The pipe 2 is fixed coaxially to the housing 1, and its lower part is located above the surface of the liquid and is perforated 7. The distributor 4 is fixed in the upper part inside the pipe 2 and made in the form of an annular pipe with nozzles 8. The diffuser 3 is installed coaxially with the pipe 2, and the lower part the diffuser 3 is fixed on the partition 9 in the form of a truncated cone connected by a large base with the case I. The lower end of the pipe 2 is provided with a bellows 10 with corrugations 11 of a screw-like shape. In the lower part of the bellows 10 a ring-shaped float 12 is fixed, for example, from foam plastic. The bottom of the float 12 is provided with helical grooves 13 for the gas to exit. The outer annular chamber 6 is expediently made in the form of a hydraulic shutter consisting of two interconnected in the lower part of cylindrical annular cavities 14 and 15. The upper part of the outer annular cavity 15 communicates with the cavity of pipe 2 by means of inclined pipes 16 through the opening 17 of the pipe.

The inner annular cavity 14 is formed with an open upper part and is installed with a gap 18 with a pipe 2. The gap is 3-5 mm. In the lower part of the housing is placed the drain pipe 19.

The device works as follows.

The gas to be cleaned from dust is fed into the device through a vertical pipe 2. Moving down pipe 2, the gas reacts with the liquid sprayed by the nozzles 8 of the distributor 4 and is partially cleaned of dust. Formed after contact of the dusty gas with the liquid, the gaps partly flow down in the form of a film along the inner surface of the pipe 2, and partially fall down in the form of droplets. The gas also moves down with elusive dust particles. At the same time, a part of the liquid flowing along the inner surface of the pipe 2 passes through the openings 17,

nozzles 16 into the annular cavity 15, from where through the open top of the inner annular cavity 14 poured into the gap 18, forming a film of flowing down liquid

on the outer part of the pipe 2.

Due to the fact that the lower part of the pipe 2 is made with perforations 7, a part of the gas through its openings comes out, interacts with the inner and outer flowing films of liquid, and is cleaned

0 from dust. Upon further movement, the gas swirls with helical corrugations 11 of the bellows 10 and enters the grooves 13 of melting 12, where it is in intensive contact with the surface of the liquid, and the float oscillates (twists and spins), improving the gas wetting conditions. The rotating jet flowing to the surface of the liquid continues to move toward the wall of the housing 1, after which it hits the partition 9, changes its direction and is pulled out into the cavity of the diffuser 3, where it is additionally cleaned of dust residues due to wetting from the perforation 7 fluid and exits the diffuser.

5 As the gas rotates at the exit from the diffuser, the droplets of liquid together with associated dust move in the radial direction under the action of centrifugal forces, collide with the inner wall of the diffuser 3, the partitions 9 coagulate and flow down in the form of a film. Since the gas significantly loses its velocity when exiting the diffuser 3 due to the large cross-sectional area of the housing 1, the elusive liquid droplets with associated

5 dust under the influence of its gravity fall down.

Improving the quality of gas cleaning in the apparatus is due to an increase in the intensity of gas contact with liquid and an increase in the surface of this contact due to the transmission of gas under the lower part of the oscillating axis of the float suspended on the bellows with helical corrugations. This provides for vortex agitation and spiraling during the whole time of the renewing layers upon contact with the liquid. The use of the outer annular chamber with the intake of liquid flowing in the form of a film on the inner surface of the pipe for the film supply of liquid through the outer part of the pipe simplifies the device

0 by eliminating the pump and the pipeline fittings to supply the waste liquid from the lower part of the housing to the annular chamber and reduces energy consumption.

0

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Claims (2)

1. Device for wet scrubbing of gas from dust, including partially filled liquid housing, installed above the surface of the liquid a vertical pipe for introducing dusty gas, the lower part of which is placed in the diffuser and is perforated, fixed in the upper part of the pipe liquid distributor and below the outside of the pipe an annular chamber, a gas outlet nozzle that is & , in order to improve the quality of cleaning, the lower part of the diffuser is equipped with a partition in the form of a truncated cone, connected with a large base to the body, and the lower end of the pipe is fitted with a bellows with screwed corrugations different shapes BUT and an annular float with helical grooves for the gas outlet, made in its lower plane. 2. The device according to claim 1, characterized in that, in order to simplify the construction and reduce energy consumption, the outer annular chamber is made in the form of a hydraulic shutter made of two annular cavities in the lower part, and in the upper part of the outer annular cavity communicates with the pipe cavity , and internally made open and placed with a gap to the pipe. 77 G6 /four - /five sri.Z 15 /four 4