RU2622138C1 - Filter - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: filter includes enclosure with sealed hooked on it the input flange with toroidal ring lugs, and pad the input window. The stud is tightly attached to the toe, which enshrines the ribs. To the body of the filter with the other hand tightly fastened caseback with output windows. Inside the filter housing are placed parallel to the axis of the input flange filter modules contained in the enclosure using the d-pad and spatially raskreplennye using lodgements. Filter modules consist of flat porous filtering elements in the form of disks with central hole. Flat porous filtering elements in the filter module are tightly connected to the principle of the bellows in their inner and outer edge. To ensure rigidity connection between a flat porous filter elements according to the principle of the bellows in the construction of filter modules used comb lining placed on top of the outer edges of flat porous filtering elements in the places of their connection.

EFFECT: increasing the efficiency and reliability of the filter.

6 cl, 4 dwg

Description

The proposed filter design is intended for cleaning gas media from various kinds of impurities and can be used in chemical, food, medical, microbiological and other industries.

Known filter element for separating liquid mixtures and gases using semi-permeable membranes according to the patent of the Russian Federation for invention No. 2070429 (class IPC B01D 63/08, priority date 03/14/1994, publication date 12/20/1996) [1].

The filter element consists of a support frame in the form of a plate with through holes, on the upper side of which supply grooves diverging from the through hole in the form of rays. A filter coating is installed on the upper side of the support frame. In the through hole located on the axis of the support frame, there is a sleeve having fixing means on the upper and lower sides for assembling the filter elements into a bag. Around the through hole on both sides of the support frame are recesses connected by openings between themselves and the inner cavity of the sleeve. Additional grooves are made on the upper side of the support frame, connecting the supply grooves in the transverse direction. A hole is made in the filter coating that coincides with the inner hole of the sleeve. The lower side of the support frame is made similar to the upper side and is equipped with a filter coating.

The disadvantages of the filter element of this design and the whole device consisting of such elements are the complexity of this design, significant material consumption, low efficiency due to the increased hydraulic resistance of the filter due to the complexity of the design.

In addition, the design of this filter device does not allow for its effective regeneration.

A known filter according to the patent of the Russian Federation for invention No. 2055631 (class IPC B01D 25/06, priority date 10/20/1992, publication date 10/03/1996) [2]. This filter for cleaning gases and liquids contains a tightly interconnected lid with an inlet, filter sections consisting of filter bags, a funnel with an outlet. The upper part of the lid is equipped with ribs for abutment in them when connecting it to the filtering section, and ribs based on the divider are made on the inner side of the lid.

In addition, the filter contains a screen for coarse filtration, a grill with a plug designed to provide radial movement of the filtered stream in subsequent filter bags. Filter bags are made of a set of washers made of carbon fiber material.

In the filter housing, each filter bag is mounted on a perforated pipe. Filter sections are placed between the two compression washers, the upper washer being latched to the upper part of the perforated pipe and the lower washer rigidly connected to the lower part of the pipe. The presence of a plug in the central part of the grate provides a radial movement of the cleaned flow in subsequent sections. Carbon fiber is used as filter material.

The disadvantages of this filter include design complexity due to the use of a large number of structural elements (parts); the use in the design of carbon fiber material as filter elements, which has insufficient mechanical strength and, in addition, low efficiency when cleaning gas from particles of at least 0.1 microns in size. The radial movement of the stream of purified gas in this filter design through the carbon fiber material of the filter element leads to an increase in aerodynamic drag, which generally reduces its resource and reliability during operation.

The design of the filter for cleaning gases and liquids using filter elements made of sintered porous materials according to the RF patent for invention No. 2070418 (class IPC B01D 36/06, B01D 39/20, B04C 9/00, priority date 02.25.1993, publication date 20.12 .1996) [3] is the closest to the proposed filter design and therefore adopted as a prototype.

The filter comprises a housing with inlet and outlet nozzles, a filter element in the form of a porous bellows made of sintered material with transverse corrugations, housed in a housing with an annular gap. The housing has a longitudinal slot connecting the cavity formed by the annular gap with a tangentially mounted inlet pipe. An additional cavity is provided in the housing, which serves to collect the separated particles, which is also connected to the annular cavity. The bellows corrugations are made with a taper angle of 6-10 °, and the body is a snail. The inner bellows of the bellows form a diffuser connected to the outlet of the filter. When the filter is working, the medium is preliminarily cleaned of large impurities in the annular gap due to separation, then it is filtered along the corrugations through a porous bellows and is discharged along its axis through the outlet pipe.

The disadvantage of the filter of this design is the difficulty of forming a monolithic corrugated porous medium of the filter element, made in the form of a bellows, capable of highly efficient gas purification (at least 99.995%) of particles with a size of at least 0.1 microns.

The objective of the proposed filter design for gas purification is the creation of such a filter design that would allow to increase the resource, including the regenerability, efficiency and reliability of the filter.

This task is carried out due to the fact that the proposed filter contains a housing with filtering elements made of sintered porous material in the form of a porous bellows with transverse corrugations installed with a gap in a sealed housing, and according to the proposed technical solution, an inlet flange having toroidal annular rings is hermetically fixed ledges, cross and entrance windows. A stud is tightly attached to the crosspiece, on which ribs are fixed. On the other hand, a back cover with exit windows is hermetically attached to the filter housing. Inside the filter housing, filtering modules are mounted parallel to the axis of the inlet flange, fixed in the housing with a cross and spatially unfastened to each other with the help of lodges. Filtering modules consist of flat porous filtering elements in the form of disks with a central hole. Flat porous filtering elements in the filtering module are hermetically connected to each other by the principle of a bellows according to their inner and outer edges. To ensure the rigidity of the interconnection of the flat porous filter elements according to the principle of the bellows in the design of the filter modules, comb overlays are applied, superimposed on top of the outer edges of the flat porous filter elements at the points of their connection.

The proposed filter design, consisting, for example, of four filtering modules, is illustrated by the following figures.

FIG. 1 is a view of the filter from the inlet flange side, FIG. 2 is a sectional view of the filter AA, FIG. 3 - unfastening of flat porous filtering elements together in the filtering module, FIG. 4 - unfastening the filtering modules in the filter housing.

The filter of the proposed design shown in FIG. 1, contains a housing (1) with an inlet flange (2) with toroidal annular projections (3), a stud (4) and ribs (5) for securing it with a cross (6) mounted on a stud (4) and used to fasten filter modules (7). Entrance windows (8), for example, five, are made in the inlet flange (2), for the filtered gas (7) of the filter to enter the cleaned gas.

A view of the proposed filter construction along section AA is shown in FIG. 2.

Inside the filter housing (1) are filtering modules (7). Each filtering module (7) consists of flat porous filtering elements (9) in the form of disks with a central hole, hermetically connected to each other by the principle of a bellows on their outer (10) and inner (11) edges. The angle between the interconnected flat porous filter elements of the bellows can be, for example, from 4 to 20 °. Filtering modules (7) are located parallel to the axis of the inlet flange (2) and are fixed inside the housing (1) using a cross (6), which is mounted on a stud (4). The inlet flange (2) has inlet windows (8) for the cleaned gas to enter the filtering modules (7).

On the other side of the housing (1) there is a back cover (12) hermetically attached, for example, by means of argon-arc welding, with outlet openings (13), for example four, for gas to escape after filtration.

Remote element B (Fig. 3) shows the connection of flat porous filtering elements (9) with each other in the filtering module (7), for example, by means of argon-arc welding. To ensure the strength and rigidity of the connection of the flat porous filter elements (9) to each other in the filter module (7), comb pads (14) are used, for example, from three or more pieces, depending on the number of flat porous filter elements in the module, located at the periphery ( along the generatrix) of the filtering module (7) with a gap (15) relative to the housing (1).

In FIG. Figure 4 (view B) shows the fastening of the filtering modules (7) with the help of lodges (16) in the filter housing between themselves, which are tightened, for example, using studs (17) and nuts (18).

Lodgements, as well as comb overlays, are used to ensure that the design requirements of the filter are met for stiffness and strength, since filtering modules can consist of a large number of flat porous filtering elements.

The filter of the proposed design works as follows. The filter is attached to the consumer’s equipment using a stud (4). Thanks to the toroidal protrusions (3), for example two, on the inlet flange (2), when the filter is attached to the consumer equipment, a tight connection is organized.

Through the inlet windows (8) in the inlet flange (2), the stream of gas to be cleaned enters the filter housing (1) and is distributed among the filtering modules (7) from the outside to the inside of the flat porous filter elements (9). The purified gas passing through the flat porous filter elements (9) leaves through the outlet openings (13) in the back cover (12).

The proposed filter design allows, without carrying out disassembly of the filter, to subject the regeneration filter to any of the methods, for example, backward blowing from the inside out, backward washing from the inside out, processing in an ultrasonic bath, thermal regeneration in a reducing medium, for example, in hydrogen, and also disinfection in hydrogen peroxide, autoclaving at temperatures up to 160 ° C. Using the filter of the proposed design will increase its service life and, in general, its reliability during operation.

The filter of the proposed design allows for highly efficient cleaning of gas (air) from particles with a size of at least 0.1 microns with an efficiency of at least 99.995%, which allows it to be used in such industries as food, pharmaceutical, medical, chemical, microbiological and others.

INFORMATION SOURCES

1. RF patent for the invention No. 2070429 "Filter element".

2. RF patent for the invention No. 2055631 "Filter".

3. RF patent for the invention No. 2070418 "Filter".

Claims (6)

1. A filter comprising a housing with sintered porous material filter elements in the form of a porous bellows with transverse corrugations installed with a gap in a sealed housing, characterized in that the filter housing has an inlet flange sealed thereon with toroidal annular protrusions, a crosspiece to which the stud is hermetically attached, with the inlet windows and ribs attached to the stud, the back cover with the outlet windows hermetically fixed on it, placed inside the filter housing, parallel to the input axis flange, filtering modules mounted in the housing with a cross and spatially fastened together by means of tightened lodgements, filtering modules consist of flat porous filtering elements in the form of disks with a central hole, flat porous filtering elements in the filtering module are hermetically interconnected according to the principle of the bellows according to their inner and outer edges, moreover, on the outer edges of the flat porous filtering elements in the joints they are superimposed overlays. 2. The filter according to claim 1, characterized in that the inlet flange is sealed to the housing by means of argon-arc welding. 3. The filter according to claim 1, characterized in that the back cover is sealed to the housing by means of argon-arc welding. 4. The filter according to claim 1, characterized in that the flat porous filter elements are hermetically connected to each other by the principle of a bellows using argon-arc welding. 5. The filter according to claim 1, characterized in that the angle between the interconnected flat porous filter elements of the bellows is from 4 to 20 °. 6. The filter according to claim 1, characterized in that the lodgements are pulled together by means of studs and nuts.

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