SU1494932A1 - Method and filter for filtering suspensions - Google Patents

Abstract

The invention relates to methods for filtering slurries, highly viscous structured fluids, as well as to the design of hydrodynamic filters and allows to increase the filter life by improving the cleaning of the filter septum and performance by eliminating unproductive discharge of the medium that is passed through, after using it for hydrodynamic flushing, into the dispersant where particles of contaminants are destroyed to a value less than the required filtration fineness and injected under increased and jets in the form of jets aimed at the filter septum, which is exposed to longitudinal-transverse vibration. The filter contains a flange 26 enclosed housing 1 with an inlet 2, an outlet 3 and a bypass branch pipe, installed in the housing 1 with a gap 5 and by means of a bellows 18 mounted on the hub 8 in front of the pump 7 rotating filter partition 6 with the base 25, disperser 10 in the form of installed with a gap 17 relative to each other concentric rings 14 and 15 with slots 16 and channel 11 for bypassing liquids, an annular collector 12 with channels 13 in the form of drillings, mounted inside the hub pulsator 19 in the form of a disk 20 with circumferential holes 21 The outlet nozzle 3 is provided with a baffle 22 with a channel 23 extending along the diameter of the holes 21 of the disk 20, and is installed with a gap 24 relative to the disk 20. The pump 7 is equipped with an impeller 9, impeller blades 32 and has a spiral or annular outlet 33. 4 C .P. f-ly, 2 ill.

Description

one

(21) 4309307 / 31-26

(22) 08/20/87

(46) 07.23.89. Bup. Number 27

(71) MSTU im. I.E.Baumana

(72) S.V. Belol, V.A.Devnsilov,

V.F1.Zhdanov, A.S. Veliev and E.A.Simukov (53) .067.3 (038.8)

(56) German Patent f 2449817, cl. B 01 D 35/20, 1976.

(54) METHOD OF FILTERING SUSPENSION AND FILTER LH OF ITS IMPLEMENTATION (57) The invention relates to methods for filtering slurries, highly viscous structured fluids, as well as to the design of hydrodynamic filters and improves filter life by improving the cleaning of the filter septum and productivity by

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excluding the unproductive core of the skipped part cpeju i, narip; u) - it after using it for hydrodynamic flushing into the disperser, where the particles of the contaminants are destroyed to less than the required filtration fineness and injected under increased pressure in the form of jets directed to the filter septum, which is exposed to longitudinal-transverse vibration. The filter contains a flange 26 of the housing 1 with the inlet 2, the output 3 and the bypass branch pipes installed in the housing 1 with a gap of 5 and by means of the bellows 18 mounted on the hub 8 in front of the pump 7 rotating filter partition 6 s

The invention relates to a filtering technique, and specifically to methods

filtering suspensions, b;

structured fluids, as well as to the design of hydrodynamic filters, can be widely used in the chemical industry, diesel engine building, etc.

The purpose of the invention is to increase the service life of the filter by improving the cleaning of the filter septum and increasing its production by suppressing an unproductive discharge of the passed part of the medium.

On fi1. 1 shows the filter design; in fig. 2 - embodiment of fil1, tra with pressure pulsator

The method of filtration is that the filtering medium is passed through a rotating filter septum, while undergoing a hydrodynamic washout of the sediment due to the bypass of a portion of the medium being filtered along the filter septum. After using the hydrodynamic flushing, the overflow part of the medium to be filtered is directed to the dispersant, where the particles of the contaminants are destroyed to a value less than the required filtration fineness, and then injected under pressure in the form of jets aimed at the rotating filter media. In this case, the filter septum can be exposed to longitudinal-transverse vibration.

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base 25, disperser 10 n in the form of concentric rings 14 and 15 with slots 16 installed with a gap 17 relative to each other and channel 11 for transferring liquids, ring collector 12 with channels 13 n in the form of drillings fixed inside the hub 8 pulsator 19 in the form of a disk 20 with circumferential holes 21. The outlet nozzle 3 is provided with a baffle 22 with a channel 23 extending along the diameter of the holes 21 of the disk 20 and installed with

a gap 24 relative to the disk 20. The pump 7 is equipped with an impeller 9, impeller blades, 32 and has a spiral or annular outlet 33. 2 p. and 3 z. p. f-ly, 2 ill.

and the filtration is carried out under the action of a pulsating differential pressure.

The filter on which the proposed method is carried out comprises a housing 1 with an input 2, an output 3, and

4 bypass pipes, installed in it with a gap of 5 relative to the walls of the housing 1, a rotating filter septum 6 connected to a drive (not shown)

rotation The filter is equipped with a pump 7 with a hub 8 and an impeller 9, a disperser 10 and a fluid bypass channel 11 connecting the disperser 10 with a gap 5 between the filter septum 6 and the housing 1, while the filter septum 6 is fixed on the hub 8 in front of the pump 7, the housing 1 is provided with an annular manifold 12 and

it has channels 13 in the form of drillings directed at an angle to the surface of the filter septum 6 and connected via a collector 12 by a bypass channel 11. The disperser 10 is made in the form of at least two concentric rings 14 and 15 with slots 16 (or holes) installed with a gap 17 relative to each other, with one ring 14 fixed on the periphery of the impeller 9, and the other 15 fixed on the body one.

The filter can be fitted with a bellows 18, through which the filter

6) tp, ca 7, pulsator 19, MPa.) 1eei1) m like lisk 20 with vyoliiii p1 him around the circle with the holes 21 and fixed inside the hub 8 of the pump 7, while the outlet port 3 of the filter is provided with a partition 22 with a channel 23 located on the diameter of the holes 21 20 and installed with a gap 24 relative to the disk 20. The filter partition 6 is equipped with a base 25 that is inclined to the axis of filtration; campuses 6, Building 1 is closed ((a trench 26, on which the pump is installed). Unit 8 is sealed by means of - maplets 28. When installed inside the hub 8 of the pulsator 19, the output stamp of the cuttings 3 is made, 1st fixed, set .chen in the hub

8 bearings 29. Channel 23 is sealed from, co., (Tels (1 disk 20 with seals 30 of face type. On the hub 8) l: floor 11; 11 faces for connection with an actuator (not shown). 7 is provided with impellers) and hydrodynamic paddles 32: p1sky compaction and C11 and 11algn. st or ring. 33.

Using a filter with the aid of a filter, the loophole is the next one.

} (a suspension (suspension) enters the nozzle 2 and is filtered through the 1st floor filtra-nal) to the rail 6. The latter, together with the pump 7, is driven through a slide 31 by means of the adapter (f; e is shown). When the filter nepei-ort rotates in due to r, by the action of centrifugal cf.cdl, the contamination particles are thrown to the periphery and, captured by the flow of bypassing liquid, flow into the pump 7. In the impeller

9, the pump 7, the pressure of the overflow liquid rises and it enters the dispersant 10, where the suspension and grinding of the suspension particles are carried out, KOTopi.-ie, exceed the size of the filtering / partitioning cells 6. The size of the slots 16 (openings) provides grinding to sizes smaller than cells of the filter septum 6. From the outlet 33, the suspension is transferred by iro to the channel 1 1 to the collector 12, from where it is injected

under high pressure P and with high bridges through channels 13 into the gap 5. As a result, intense

a strong hydrodynamic CMI.JB layer of contaminants tg of sediment from the surface of the filter) oval partition. This significantly improves the cleaning of the filter septum 6 and increases the service life of the filter, which is especially important when filtering the suspension in a non-Newtonian polymer-based IQ medium, since such a medium is prone to the formation of their pigments and rapid boiling of porous partitions. Due to the fact that disperser of 15 large (jMe) aTOD particles occurs in disperser 10 when rotating rotating OTtioCHTenb (but each other, count g-c 1 L and 15 with slots 16, particles); prohs. d t through phpted 1-p o b a fiegril; .y 6 and that / O sama -1 -1 is useful with. Thus, the filter turns out to be a relay of a selective filter that permits particles of the suspension not exceeding one decade. Such filters are 25 dispensable in chemical technology and dredger for filtering slurry fuels. When installed inside the hub 8, the pulsator 19 creates pressure pulsafi due to 0 measuring the hydraulic resistance B1.1 of the filter inlet 3 with periodic coincidence of the holes 21 with the channel 23. The pulsing pressure differential acts on the base 25, in which the force is created The elastic bellows 18, iodically from the o-ghakkhtsa 18. By making the base 25 oblique, the force is decomposed into two components, Q, parallel and perp; 1 the lumen of the filter-section axis and 6. As a result, longitudinal-transverse vibrations are created .

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The combination of longitudinal-transverse vibrations with the rotation of a generalized 6 and with hydrodynamic washing out of the sludge and flow of the bypass suspension provides high efficiency of continuous cleaning of the filter septum 6, allows filtering by non-Newtonian fluids and suspensions. Due to the presence of the dispersant 10, the suspension of the suspension at the inlet 2 of the filter, the productivity is improved and the elimination of the phosphorus of the suspension is ensured.

Example. To evaluate the effectiveness of the method, comparative tests of the proposed filter and the filter in which the known method is carried out were carried out. The tests were carried out under the same conditions (pressure at the inlet) and on the same medium — suspensions (15% by weight of quartz sand, average media size and 10–15 µm particle diameter) in a solution of acrylic acid copolymer and allyl pentaerythritol ethers.

As a result of the tests, it was found that the service life of the filter increases on average by 70-75% due to the improved cleaning of the filter septum 6 during the filtration process.

The design of the filter is compact, has small dimensions and weight, has a high tightness, which is especially important when filtering toxic and explosive and explosive media.

Claims (5)

1. A filtering method, which implies that the medium being filtered is passed through a Ballroom partition filter through a rotating filter, while performing a hydrodynamic flow of the sediment from the filter partition by passing a portion of the filtered medium along the filter partition, characterized in that , in order to increase the filter life by improving the cleaning of the filter septum and improving its performance by eliminating unproductive discharge of the passed-through part of the medium, part of the filtered medium after use for hydrodynamic flushing is sent to a dispersant, where particles of the H1y contamination are disintegrated to a value less than the required filtration fineness, and then injected under increased pressure in the form of jets aimed at a rotating filter septum. 2. The method according to claim 1, about t l and h a - y y and with the fact that the filter 0 five 0 five five ABOUT 0 five 0 the septum is subjected to longitudinal-transverse vibration, and the filtration is carried out by the action of a nulling pressure drop. 3. Filter, housing with an inlet, outlet and bypass nozzles and a rotating filter partition installed in it with a clearance relative to the housing walls, connected to a rotational drive, characterized in that in order to increase the filter life and performance, it is equipped with a pump with a hub and an impeller, a disperser, and a fluid bypass channel connecting the disperser with a gap between the filter septum and the housing, with the filter septum mounted on the hub in front of the pump, The housing is provided with an annular collector and in it channels are made in the form of holes directed at an angle to the surface of the filter of the 7th partition and connected via a collector to the bypass channel. 4. The filter according to claim 3, characterized in that the dispersant is made in the form of at least two concentric rings with slots installed with a gap relative to each other, with one locking ring: lenty on the periphery of the impeller, and the other stationary on the case. 5. Filter on PP. 3 and 4, characterized in that it is provided with a bellows. by means of which the filter septum is fixed on the pump hub, and a pulsator made in the form of a disk with holes in it circumferentially and fixed inside the pump hub, while the outlet of the filter is provided with a partition with a channel located on the diameter of the disk holes and installed with a gap relative to the disk, the filter partition being provided with a base inclined to the axis of rotation of the filter partition. /;