SU1487954A1 - Granular-type filter - Google Patents

Description

The invention is intended for cleaning gas from dust. The purpose of the invention is to improve reliability

filter and increase the filter cycle. The filter includes a housing 1 with an inlet 2 and outlet 3 nozzles and filtering material 6 in sections 11 of cylinders 12 with corrugated perforated walls 13. Inside the cylinders 12 are installed perforated corrugated tubes 17 connected to the nozzle 3 of the manifold manifold 18. Before regeneration with a bellows drive 23 Cylinders 12 and tubes 17 stretch and flush the filter material 6. The gas flow, escaping from the purge pipes, loosens and twists the filter material 6, which ensures intensive and high-quality purge. 2 h; n. f-ly, 3 yl.

(X

m

WITH

cl

Fm.1

3

1487954

four

The invention relates to the purification of gases from dust by filtration through a layer of granular material and can be applied in chemical, energy and other industries.

The purpose of the invention is to increase the reliability of the filter and increase the filter.

FIG. 1 shows a filter, a general view, 'in FIG. ’2 - node I in FIG. 1 ', FIG. 3 - node II in FIG. 2

The granular filter includes a housing 1 with an inlet 2 and an outlet 3 with nozzles and a lid 4, filtration channels 5 loaded with granular material 6, gas ducts 7 and 8, respectively. For dusty and purified gases and a device 9 for the regeneration of granular material 6 by reverse blowing.

Each filtering channel 5 is made in the form of a horizontal partition 10 divided into sections 11 of a cylinder 12 with perforated corrugated walls 13. In each section 11, a granular material is placed on the partition 10. The upper ends of the perforated corrugated walls 13 of the cylinder 12 'are attached to the lid 4 of the housing 1, and the lower ends of the cylinders 12 are connected to a supporting grid 14 having a drive 15 of its vertical displacement. The holes 16 of the support grid 14 are located between the cylinders 12.

In cylinders 12 coaxially with them are placed tubes 17 with walls in the form of helical perforated corrugations.

. The internal cavity of the tube 17 is communicated with the outlet pipe 3 through the manifold 18.

The tubes 17 are provided with a vent nozzle 19 with a check valve '20, made in the form of a rubber tube 21 placed at the end of the nozzle 19 with a flattened free end 22.

The cross section of the pipe 19 should be 10 times larger than the cross section of the hole in the perforation of the tube 17. The pipes ^ are set at the level of partitions 10 with an inclination to them. The actuator 15 of the vertical movement of the support grid 14 is made in the form of bellows 23, the upper cover .24 of which is attached to the walls of the housing 1, and the bottom 25 is connected by rods 26 to the grid 14.

The cavity of the bellows 23 is communicated with the outlet pipe 3 through the valve 27 by means of the pipe 28. The outlet pipe 3 is also provided with a valve 29 installed in front of the pipe 28 and the pipe 30 for supplying the purge gas. The pipe 3 is connected to the suction line of the fan (not shown).

The lower part of the housing 1 is provided with a nozzle 31 for sucking contaminated sweep gas.

Granular filter works as follows.

Close the valve 29, open the valve 27 and include a suction fan (not shown). As a result of vacuum in the cavity of the bellows 23, the corrugations of the walls are compressed and move the thrust 25 upwards. When this lattice 14, rising, compresses. Corrugated walls of cylinders 12 and tubes 17, and the granular material is compacted. Next, the valve 27 is closed, the valve 29 is opened, and then contaminated gas is fed through pipe 2, which is passed through the ducts 7 through the filtering granular material 6 and enters through the perforation of the tubes

17 into the flue 8, from where it goes through the manifold 18 and the branch pipe 3 to the consumer.

When the filter resistance reaches the specified values, the granular material 6 is regenerated. To do this, the valve 27 is opened, ^_ as a result of which the gas from the collector

18 is sucked into the cavity of the bellows 23, which allows the lattice 14 under the action of its mass and the mass of the cylinders 12 to fall. While the corrugations of the walls 13 of the cylinder 12 and tube 17

. expanding with an increase in the volume between the partitions 10. This leads to the formation of a gas interlayer between the granular material 6 and the partition 10 in each section ^ of the cylinder 12. The nozzle 30 is fed into the tubes 17 by a compressed purge gas, which through the perforations of the tubes 17 and in large part through the blow holes nozzles 19 are flattened into the thickness of the granular material 6.

At the same time, the flattened end 22 of the tube 21 acquires a round shape and does not prevent the exit of the purge gas. So nak nozzles 19 are directed with a slope upward, the purge gas escaping from them is loosening and

^s 1487954

granular regeneration

reverse purge o

weighs the granular material 6 into the gas layer under the partitions 10, and the pepegas mixture passes perforation of the walls 13 of the cylinders 12 and is discharged through the duct 7 through pipe 31 to be cleaned. Due to the fact that the corrugations of the tubes 17 are made spiral, the granular material 6 loosened and lifted upwards acquires a rotational motion, which contributes to a better separation of dust from the grains, since the grains more intensely collide with each other and their best mixing occurs in the flow of purge gas. Since the granular material 6 in each section 11 between the partitions 10 occupies a small volume, the removal of dust from the material 6 is sufficiently complete and in a short period of time. After regeneration, the valve 27 is opened, the valve 29 is closed and gas is sucked from the cavity of the bellows 23 through the pipe 3, which, contracting, compress the filter material 6 in the cylinders 12.

Next, close the valve 29 closes the filtering cycle.

valve 27, oti renew

Claims (3)

Claim A granular filter for cleaning I, including a housing with inlet and one. gas, outlets and a lid, filtration channels loaded with granular material, ducts for dusty and cleaned gases and devices for ten 15 20 thirty 35 material t l and cushing with the fact that, in order to increase the reliability of the filter and increase the filter cycle, each ka. The filtering line is made in the form of a horizontal partition divided into cylinder sections with perforated corrugated walls, the upper end of which is attached to the housing cover, and provided with a coaxially arranged tube, the walls of which are made in the form of helical perforated corrugations, the filter is equipped with a supporting grid with a vertical drive displacement, which is connected to the lower ends of the cylinders, while the internal cavities of the tubes are communicated by a collector with an outlet nozzle. 2. The filter according to claim. 1, characterized in that each tube is equipped with purge connections with 25 with a check valve installed at the level of the partition walls inclined to them, while the check valve is made in the form of a rubber tube placed at the end of the purge pipe with a flattened free end. 3. The filter according to claim 1, characterized in that the drive of the vertical displacement of the support grid is made in the form of bellows, the cover of which is attached to the walls of the case, and the bottoms are connected by rods to the ’support grid, with the bellows cavities communicating with the outlet. 1487954 2 srig.z