RU2242266C1 - Filter for purification of liquid mediums - Google Patents

Abstract

FIELD: filters for purification of liquid mediums.

SUBSTANCE: the invention is dealt with devices for purification of liquid mediums (solutions, suspensions, dispersions, etc.) from dissolved organic substances and mechanical impurities also may be used in different industries, in particular, for purification of working mixtures of absorbents, potable water, alcohol, sewage, dissolvents, etc. The filter contains a vertical cylindrical body with an inlet branch-pipe, branch-pipes and a filtering member installed with a ring-type clearance with regard to the body. In the ring-type clearance there is accumulative-distributive section with one or two channels for distribution of a liquid. At that the section is linked to the inlet branch-pipe and the channel or channels - with a cavity of the body. The accumulative-distributive section and the channel or channels for distribution of a liquid are formed by an inner surface of the body and an installed in the body vertical guide of a curvilinear profile, bounded above and from below by plates. At that the channel or channels have a profile of the diffuser type in a cross-section. In the ring-type clearance between the body and the filtering member there are guiding plates equal in height to the filter member and mounted tangentially to its surface with a positive allowance with respect to each other. At that the total flow cross-section of the positive allowances does not exceed three flow cross-sections of the inlet branch-pipe. The guiding plates are made with the bent inside edges. The technical effect is an increase of efficiency of purification of liquid mediums from dissolved organic matters and mechanical impurities and elongation of service life of the filter.

EFFECT: the invention ensures increased efficiency of purification of liquid mediums from dissolved organic matters and mechanical impurities and elongation of service life of the filter.

3 cl, 3 dwg

Description

The invention relates to a device for cleaning liquid media (solutions, suspensions, dispersions, etc.) from dissolved organic substances and mechanical impurities and can be used in various industries, in particular for cleaning working solutions of absorbents, drinking water, alcohol, wastewater, solvents etc.

A known filter for cleaning solutions of monoethanolamine from resinous substances and mechanical impurities, containing a vertical cylindrical body with nozzles, a switchgear and filter material located in the filter in layers separated by a metal mesh made of wire. As the filter material used activated carbon fiber (see US Pat. RF No. 2046629, IPC ⁶ B 01 D 15/04, publ. 10.27.95).

Common features of the proposed and known filters are:

- vertical cylindrical body;

- inlet and outlet nozzles;

- filter element.

A disadvantage of the known filter is the insufficiently high degree of purification of the liquid from organic substances and solids.

The closest in technical essence and the achieved result to the proposed device is a filter for cleaning liquid media containing a vertical cylindrical housing with an inlet pipe, outlet pipes and a filter element installed with an annular gap relative to the housing. In the annular gap of the housing, a storage and distribution compartment with one or two channels for distribution of the medium is made. The storage and distribution compartment is connected to the inlet pipe, and the channel or channels are connected to the cavity of the housing (see US Pat. No. 3513980, IPC B 01 D 27/08, publ. 05.26.70).

Common features of the proposed and known filters are:

- vertical cylindrical body;

- inlet pipe;

- outlet pipes;

- a filter element mounted with an annular gap relative to the housing;

- in the annular gap there is a storage and distribution compartment with one channel or two channels for medium distribution;

- the storage and distribution compartment is connected to the inlet pipe;

- channel or channels connected to the cavity of the housing.

The disadvantages of the known filter is the low cleaning efficiency due to the uneven distribution of the solution being cleaned over the volume of filter elements. As a result of the uneven distribution of the liquid over the surface of the filter elements, the filter surface is inefficiently used, i.e. their lower part, in any case (when the filter cavity is completely filled or partially), quickly fulfills its resource and requires replacement while maintaining the upper part, which leads to irrational use of the filter surface and, as a result, an increase in capital and operating costs.

The technical problem is to increase the efficiency and duration of cleaning liquid media from organic substances and mechanical impurities dissolved in them, as well as to reduce capital and operating costs.

The task is implemented in the proposed filter for cleaning liquid media, including a vertical cylindrical housing with an inlet pipe, outlet pipes and a filter element mounted with an annular gap relative to the housing, in which a storage and distribution compartment connected to the inlet pipe has one or more channels for distribution media connected to the body cavity.

The novelty of the filter lies in the fact that the storage and distribution compartment and the channel or channels for distributing the medium are formed by the inner surface of the housing and the vertical curved profile guide installed in the housing, bounded above and below by the plates, the channel or channels being made with a diffuser type cross-sectional profile.

Moreover, in the annular gap between the housing and the filter element, guide plates are placed that are equal in height to the filter element and are installed tangentially to its surface with a gap relative to each other, while the total passage section of the gaps does not exceed three passage sections of the inlet pipe.

In addition, the guide plates are made with curved inward edges.

The implementation of the storage and distribution compartment with one or two channels for distributing the medium between the inner surface of the housing and the vertical guide of a curved profile installed in the housing, bounded above and below the plates, allows the kinetic energy of the incoming stream to be converted into static energy, which will ensure subsequent uniform distribution of the liquid over the entire height filter.

The implementation of the channel or channels with the profile of the diffuser type in cross section allows with minimal hydraulic losses to distribute the liquid throughout the entire annular gap between the housing and the filter element.

The distribution of the flow of the liquid being cleaned uniformly throughout the volume of the filter material significantly increases the degree and duration of high-quality cleaning of liquid media from dissolved substances, and the filter surface is used rationally and for a long time, which leads to lower capital and operating costs.

The placement in the annular gap between the housing and the filter element of the guide plates, equal in height to the filter element and set tangentially to its surface with a gap relative to each other, the total passage section of which does not exceed three passage sections of the inlet pipe, allows you to evenly distribute the liquid around the entire perimeter of the filter element .

The implementation of the guide plates with curved inward edges reduces their hydraulic resistance at the outlet of the liquid being cleaned, which improves the quality and duration of cleaning.

The filter is shown in the drawings, in which Fig. 1 shows a general view, a longitudinal section, Fig. 2 is a section along A-A with one channel for distributing the medium, Fig. 3 is a section along AA, an embodiment of a filter with two channels for distribution of the medium.

The filter consists of a vertical cylindrical housing 1, lower 2 and upper 3 bottoms, an inlet pipe 4 located on the side surface of the housing 1, an outlet pipe 5 for outputting a cleaned medium, an outlet pipe 6 designed to release the apparatus from the solution, and a filter element 7, made in the form of a coil with a roll laying of filtering material on the bail 8, which is a perforated pipe. The filtering element 7 is installed with an annular gap relative to the housing 1. In the annular gap of the housing 1 there is a storage and distribution compartment 9 with a channel 10 for distributing the medium, formed by the inner surface of the housing 1 and the vertical guide 11 curved profile, bounded above and below by the plates 12 and 13. The storage and distribution compartment 9 is connected to the inlet pipe 4, and the channel 10 is connected to the cavity of the housing 1. The channel 10 in cross section has a diffuser type profile, the neck 14 of which is made with a passage section equal to 0.5-1.0 from the passage section of the inlet 4. The filter roll is externally and internally bounded by a metal mesh 15. The filter element 7 is mounted on a support ring 16 and can be removed from the apparatus to replace the filter material with trusses rings 17. In the annular space between the housing 1 and the filter element 7 around the entire perimeter of the housing 1 are placed guide plates 18, equal in height to the filter element 7 and made with curved inwardly curved edges. The guide plates 18 are installed tangentially to the surface of the filter element 7 with a slope along the fluid flow and with a gap to each other, while the total passage section of the gaps does not exceed three passage sections of the inlet pipe 4. The guide plates 18 serve to uniformly distribute the entire solution flow around the perimeter roll of filter material.

The filter works as follows. The liquid solution flow enters radially from the side through the inlet pipe 4 and enters the storage and distribution compartment 9 of the filter. Further, the flow of the solution, passing compartment 9 and channel 10, is evenly distributed over the entire height of the housing 1. After that, the flow of the solution to be cleaned, distributed along the annular gap along the perimeter of the housing 1, passes through the gaps between the guide plates 18 and is directed through the volume of the rolled-up filter material the filter element 7, where it is cleaned from dissolved substances, in the middle part of the housing 1. Due to the fact that the guide plates 18 are sloped along the movement of the fluid flow, and the edges are guided their plates facing the filter element 7 are curved inward curved in such a way that the distance between the edges of adjacent guide plates along the outer perimeter is less than the distance between the edges of adjacent guide plates along the inner perimeter, the flow of the solution to be cleared, falling into the gap between the guide plates 18 is directed almost radially onto a roll of filter material. The total passage area of the gaps between the guide plates 18 should be equal to no more than three passage sections of the inlet pipe 4. Thus, in each gap between the guide plates 18, a small part of the total flow of the solution to be cleaned is separated, and therefore the entire flow is evenly distributed over the cylindrical surface of the filter element 7. The purified solution from the filter is discharged through the pipe 5.

In the embodiment of the filter, the storage and distribution compartment 9 is made with an additional channel 19, connected similarly to the channel 10 with the cavity of the housing 1. The channel 19 in cross section also has a diffuser type profile, the neck 20 of which is made with a passage section equal to 0.5-1, 0 from the inlet section of the inlet 4. In this embodiment, the filter to be cleaned is divided in the storage and distribution compartment 9 into two equal flows, each of which is directed from the channels 10 and 19, respectively, along the perimeter of the housing sa 1 towards each other. The guide plates 18 located along the perimeter of the housing 1 along the flow of the solution to be cleaned from the channel 10 are at an acute angle to the flow, and the guide plates 18 located along the perimeter of the housing 1 along the movement of the cleaned solution from the channel 19 are at an acute angle to this flow. To prevent vortex formation when mixing these two streams of the solution to be cleaned, directed towards each other, dividing plates 21 are arranged diametrically opposite the storage and distribution compartment 9 in the housing 1 vertically along the height of the filter element. The separation plates 21 are curved curved from the inner wall of the housing 1 to the filter element , which reduces their hydraulic resistance and allows you to direct the remaining flows almost radially on a roll of filter material.

Claims (3)

1. A filter for cleaning liquid media, comprising a vertical cylindrical housing with an inlet pipe, outlet pipes and a filter element mounted with an annular gap relative to the housing, in which a storage and distribution compartment connected to the inlet pipe is made with one or more channels for medium distribution connected with a body cavity, characterized in that the storage and distribution compartment and the channel or channels for distributing the medium are formed by the inner surface of the housing and lennoy vertical guide in the housing curved profile bounded by the top and bottom plates, wherein the channel or channels formed to the profile of the diffuser-type cross section. 2. The filter according to claim 1, characterized in that in the annular gap between the housing and the filter element there are guide plates equal in height to the filter element and set tangentially to its surface with a gap relative to each other, while the total passage section of the gaps does not exceed three passage sections of the inlet pipe. 3. The filter according to claim 2, characterized in that the guide plates are made with the edges bent inward.

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