SU1736570A1 - Automatically regenerated air filter - Google Patents

Abstract

The invention relates to the field of gas cleaning from dust and can be used in pneumatic conveying devices and dust collecting installations. The purpose of the invention is to simplify the operation of the filter by eliminating the drive of the gas flow switching valve. The device comprises a housing with two sections having a common inlet and separated into a dust collection chamber and a clean gas collection chamber. Each section has at least one porous filter element connected to the valve of the clean gas collection chamber of the adjacent section by means of a lever mechanism. At the inlet of dusty gas in the section, a non-power two-position switch is installed. 1 il.

Description

The invention relates to devices for the dry cleaning of gases from dust particles (aerosols) by filtration through porous filter elements and can be used in pneumatic conveying devices and dust collecting installations.

A filter is known that contains hermetic cassettes with filter elements, an air collector, a support plate and spring valves. The cleaning of the fabric filter element in such a filter is performed by shaking the latter while moving the spring valve mechanically connected with the filter element.

Known filter, comprising a housing, made in the form of two sections with filter elements, divided into a chamber for collecting dust and a chamber for collecting purified gas, valves, inlet. In the known filter, alternate operation and regeneration of the filter elements is ensured by automatically redistributing the gas flows to be cleaned. The regeneration of the filter elements in this case is carried out by alternately turning them out.

The purpose of the invention is to increase productivity by improving the quality of regeneration of filter elements by shaking them repeatedly and simplifying the operation of the aerofilter.

The set point is achieved by the fact that in an aerofilter comprising a housing made in two sections with one or more filtering elements in each section, there are common inlet and outlet pipes, each section including a dust collection chamber and a clean gas collection chamber with outlet outlet valve, at the inlet of the dusty gas in the section there is a non-power two-way switch and each filtering

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the element is connected by means of a lever mechanism to a valve of an adjacent section installed at the outlet of the clean gas collection chamber.

The drawing shows the air filter, incision.

The air filter comprises a housing 1, symmetrically divided by a vertical partition 2 into the left 3 and right 4 sections with a common inlet 5, Each section is divided into a dust collection chamber 6, closed at the bottom with a cover 7, and a dust collection gas 8, locked by a valve 9. The inlet 5 and the dust collection chamber 6 are communicated by a window 10 for the entry of dusty gas to be cleaned. The windows 10 of each section alternately overlap with a non-power two-way switch 11, for example, consisting of two branches rigidly connected by a common axis of rotation 12. The stability of the on-off switch 11 in extreme positions is provided by a spring 13 located on the outside of the housing 1 and acting on the axis 12 of the two-bi-zion switch 11 through a rigidly connected lever 14. Each aerofilter section contains a porous filter element 15 reinforced between the collection chamber 6 dust and chamber 8 collecting the purified gas, the filter elements in each section may be several. Structurally, the filtering elements can be elastic (for example, a fabric bag or membrane type) or rigid, but flexible, for example rubber, a bond between the filter element and the aerofilter housing.

Each filter element 15 is connected by a lever mechanism 16 with a valve 9 locking the chamber 8 of collecting the dust-free gas of the adjacent section. The valve 9 is pressed against the seat by a spring 17. The force of pressing the valve 9 to the seat is controlled by the tension of the spring 17. The valves 9 with lever mechanisms 16 are closed by a collector box 18, which contains a flange 19 for connecting (if necessary) the pipeline (not shown ) discharging the purified gas.

The air filter works as follows.

The gas to be cleaned (sign 3 in the drawing) enters the inlet 5. At one of the extreme positions (for example, in the extreme right position), the non-power two-way switch 11 passes the dusty gas to one of the filter sections (to the right

section 4). Passing through the filter element 15, the gas is cleared of dust and accumulates in the chamber 8 of the collection of the purified gas of the right section 4. Dust at the same time accumulates on

the filter element 15 from the side of the dust collection chamber 6 of the right section 4, the gas cleaned from dust (sign 5 in the drawing) creates pressure on the valve 9 of the right section 4. When. The magnitude of the gas pressure force is greater than

0 pressing force of valve 9 to the seat, determined by valve weight and tension of spring 17, valve 9 rises (opens) and gas rushes into collector box 18. Through lever mechanism

5 16, the movement of the valve 9 is transmitted to the filter element 15 of the adjacent (left 3) section, which leads to shaking the movable part of the filter element 15 attached to the lever mechanism 16.

0 Strain from the left filter element dust under the action of gravity enters the chamber 6 of the dust collection section in which this filter element (in this case left) is placed.

5 As a result of opening the valve 9, the pressure in the chamber 8 of collecting the purified gas drops and the valve 9 returns to its initial position (closes) under the influence of the spring 17, which leads to a repeated

0 shaking the filter element. The shaking of the left filter element is repeated many times until the right filter element clogs with dust and loses its ability to pass

5 gas in the chamber 8 collecting the purified gas. The loss of throughput by the filter element of the right section leads to an increase in pressure in the dust collecting chamber 6 of the right section and in the inlet 5. To this

In time, the capacity of the left filter element is restored by repeated shaking and the pressure in the dust collecting chamber 6 of the left section 3 is almost equalized with the pressure in the collector box 18. The pressure increase in the inlet 5 and pressure drop in the dust collecting chamber 6 of the left section 3 create a pressure difference on both sides of the left branch of the two-position switch 11, under the influence of some of the two-position switch 11, overcoming the force of the spring 13, turns to the other extreme ( evoe) position, opening the way to a dusty gas to the left

5 filter section, which leads to the gas acting on the valve 9 of the left section and to repeated shaking of the filter element of the right section, which ensures its regeneration. The pressure difference at which the on-off switch 11 switches from one extreme position to the other is controlled by tensioning the spring 13.

Claims (1)

The proposed aerofilter provides repeated shaking of the filter elements, thereby improving the quality of their regeneration, and virtually eliminating excess gas pressure in the section where the filter element is regenerated, which allows alternately cleaning the dust collection chambers without interrupting the operation of the aerofilter. Claims of the invention: An auto-generated aerofilter comprising a housing made in the form of two 0 five sections with filter elements, common inlet and outlet nozzles, each section includes a dust collection chamber and a clean gas collection chamber with a valve installed at the outlet, characterized in that, in order to increase productivity by improving the quality of regeneration and simplify operation, the aerofilter is equipped with a dual-purpose wireless actuator mounted above the inlet nozzle at the entrance to the dust collection chambers and a lever mechanism designed to interact with the filter elements and the valve . 19--4 18 17