RU2335329C1 - Slotted centrifugal filter - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention is intended for fluid and gas treatment in chemical, oil-processing and other industries. Filter includes cylindrical case with treated medium inlet jet and mechanical admixture outlet jet, removable coaxial filtering cartridge, tubular filtering element with external filtering surface comprised by slotted grids in the form of cylindrical spiral made of precise V-shaped profile. One end of filtering cartridge is fixed in a pipe, while the other end is fixed in a fairing. Mechanical admixture outlet jet is connected to a mud box with drain jet. A baffling mesh is installed between the mechanical admixture outlet jet and mud box. A vortex chamber with flow swirler in the form of blades installed stationary inside the vortex chamber tube is connected to the case. Blade tilt angle ensures the optimum conditions for continuous flow along the blade contour.

EFFECT: simplified construction and increased filter capacity and life time.

6 cl, 3 dwg

Description

The invention relates to filtering, and in particular to cartridge filters intended for the purification of liquids and gases in chemical, oil refining and other industries.

Known slotted centrifugal filter containing a housing with a nozzle for supplying a cleaned medium and a nozzle for removing mechanical impurities, a coaxially located filter cartridge, a mud chamber with a drainage nozzle connected to a nozzle for removing mechanical impurities (SU 1209253, B01D 27/00, B01D 27/12. Date of publication: 02/07/86). In this filter, particles of impurities under the action of centrifugal forces are thrown to the wall of the casing and are lowered into the mud chamber, at the same time, filtering is carried out through the filter cartridge and the outlet of the purified liquid through the pipe. This device is characterized by rapid siltation of the surface of the filter element, which will lead to a decrease in performance and filter service life.

The problem to which the invention is directed, is to simplify the design, increase productivity and service life of the filter.

The problem is solved due to the fact that the filter is a centrifugal slotted filter containing a housing with a nozzle for supplying a cleaned medium and a branch pipe for removing mechanical impurities, a coaxial filter cartridge, a mud chamber with a drainage nozzle connected to a branch pipe for removing mechanical impurities, the housing is cylindrical, filter the cartridge is removable, and its filter element has a tubular shape with an outer filtering surface and is a slotted lattice made in the form of qi a spiral spiral from a high-precision profile of a V-shape fixed by welding on the supporting elements at each point of their intersection, while the V-shaped profile creates a rigid screen with longitudinal slots of a certain size, the filter cartridge being fixed at one end in a pipe with a connecting flange, the other end is fixed in a fairing with a central hole, a baffle net is installed between the pipe for removing mechanical impurities and the mud chamber, a swirl chamber is attached to the filter housing in the form Pipes, wherein the flow swirler is installed, made of blades fixedly mounted in the tube.

In addition, the longitudinal slots are made in sizes from 100 to 5000 μm with a tolerance on the width of the slit up to ± 15 μm.

In addition, the support elements are located in the inner cavity of the filter element.

In addition, the branch pipe removal of mechanical impurities has the same diameter with the housing.

In addition, the angle of inclination α of the blades is taken equal to 70 °. In addition, the centering rod, on which the blades of the flow swirl are fixed, has a stepped shape, one end of a larger diameter is made streamlined, and the other end of a smaller diameter with a truncated cone end is fixed in the central opening of the fairing.

The invention is illustrated by drawings.

Figure 1 - General view of the filter slotted centrifugal.

Figure 2 - cross section of the filter element.

Figure 3 - cross section of the swirl flow.

The centrifugal slotted filter includes a cylindrical body 1, which is a pipe, one end of which is an inlet of the medium to be cleaned, with a pipe for removing mechanical impurities 2 connected to the body and having the same diameter as the filter body 1 pipe, connecting flanges 3 and 4, and the flange 3 has a groove for installing in it a removable coaxially located filter cartridge 5, consisting of a filter element 6 of a tubular shape with the outer surface of the filter This method consists of slotted gratings made in the form of a cylindrical spiral from a high-precision profile 7 of a V-shape, fixed by welding on supporting elements 8 at each point of their intersection. In this case, the supporting elements 8 are located in the inner cavity of the filtering element 6, and the V-shaped profile creates a rigid screen with longitudinal slots of a certain size, which can be made in size Δ = 100 to 5000 μm with a tolerance of a gap width of up to ± 15 μm. The filter element 6 is fixed at one end in a pipe 9 with a connecting flange 10, the other end is fixed at a fairing 11 with a central hole 12. A dirt chamber 13 with a drainage fitting 14 is connected to the branch pipe of the mechanical impurities 2, between the branch pipe of the mechanical impurities 2 and the mud chamber 13 a bump net 15 is installed.

A swirl chamber 17 of the flow of the medium to be cleaned is connected to the connecting flange 4 in the form of a pipe with two flanges at the ends, in which a swirl of flow 18 is installed, which is a blade 19 fixedly installed in the tube of the swirl chamber 17, the angle of inclination a is taken to be 70 °, the blades 19 mounted on a centering rod 20, of stepped form, one end of which is of a larger diameter has a streamlined shape, and the other end of a smaller diameter with an end in the form of a truncated cone is fixed in the central hole 12 of the fairing 11. Filter centrifugal spruce is installed in the line with the medium being cleaned.

The operation of the slotted centrifugal filter is as follows. The flow of the medium to be cleaned, which arises as a result of the operation of the external device [pump] under pressure, enters the swirl chamber of the stream of the medium to be cleaned 17 and enters the blades 19 of the stream swirl 18, while the stream of the medium to be cleaned acquires rotational-translational motion, since there are two components of the flow velocity: axial, directed along the flow, and radial, directed perpendicular to the flow and coinciding with the direction of action of the centrifugal force, and contributing to its development. Then, the flow of the medium to be cleaned enters the entrance to the pipe of the housing 1. Due to the centrifugal force created by the swirling flow, particles of mechanical impurities are thrown to the wall of the pipe of the filter housing 1 and, moving along the main axis of the filter, fall into the branch pipe of removal of mechanical impurities 2. Part of the impurities is delayed on the outer surface of the filter element 6, but then washed off by the oncoming flow and also falls into the branch pipe removal of mechanical impurities 2. Next, the impurities pass through the fencing mesh 15, and fall into the mud Yeru 13 and then into the drain fitting 14. In this baffle grid cells inhibit leaching of solids from the mud chamber 13 in discharge tube 2. The filtered fluid enters the inner cavity of the filter cartridge 5 next to the backbone.

The advantages of a centrifugal slotted filter are the use of a durable original filter element, high efficiency of the working process based on the hydrodynamics of the moving flow, simplicity of the design of the main body parts, convenience and ease of maintenance, extended service life, simple and convenient installation on existing piping systems.

At the same time, filters of this design can be used in a wide range of performance.

Claims (6)

1. A centrifugal slotted filter containing a housing with a nozzle for supplying a cleaned medium and a branch pipe for removing mechanical impurities, a coaxially located filter cartridge, a mud chamber with a drainage nozzle connected to a branch pipe for removing mechanical impurities, characterized in that the housing is cylindrical, the filter cartridge is removable , and its filter element has a tubular shape with an outer filtering surface and is a slotted lattice made in the form of a cylindrical spiral from a V-shaped cell profile secured by welding to the supporting elements at each intersection, the V-shaped profile creating a rigid screen with longitudinal slots of a certain size, the filter cartridge being fixed at one end in a pipe with a connecting flange, the other end is fixed in the fairing with a central hole, between the branch pipe for removing mechanical impurities and the mud chamber, a fencing grid is installed, a swirl chamber in the form of a pipe, in which swirl flow formed of the blades, permanently mounted in the pipe. 2. The centrifugal slit filter according to claim 1, characterized in that the longitudinal slots are made in size from 100 to 5000 μm with a tolerance on the slot width of up to ± 15 μm. 3. The centrifugal slotted filter according to claim 1, characterized in that the support elements are located in the inner cavity of the filter element. 4. The centrifugal slotted filter according to claim 1, characterized in that the pipe for removing mechanical impurities has the same diameter with the housing. 5. The centrifugal slotted filter according to claim 1, characterized in that the angle of inclination of the blades is taken equal to 70 °. 6. The centrifugal slit filter according to claim 1, characterized in that the centering rod on which the blades of the flow swirl are fixed has a stepped shape, one end of a larger diameter is streamlined, and the other end of a smaller diameter with a truncated cone end is fixed in the central hole fairing.

Images