RU2709275C1 - Modular filtration unit - Google Patents

Abstract

FIELD: manufacturing technology.

SUBSTANCE: invention relates to filtering devices with possibility of regenerating filter elements and can be used in power engineering, transport, petrochemical and other industries for fine purification of fuel, oil and other liquids. Block-modular filtration plant equipped with control system is a complex consisting of several process components, including fine filters, shutoff and control valves, sensors used for pressure control, process components included in the complex are fixed between the support elements providing their stability, fixed on the metal movable base, which is a sealed tray, and includes a cleaned fluid manifold, a drain manifold, an external back flushing manifold, a back blow-through manifold, an air manifold, wherein fine filters are connected respectively through shutoff and control valves with manifolds, each filter is a cylindrical filter chamber, which housing consists of upper and lower parts, between flanges of which there is a pipe grid, dividing filtration chamber into upper conditionally clean and lower conditionally dirty chambers, in through holes of tube grid there installed are metal filtering elements of tubular shape.

EFFECT: invention provides higher productivity and efficiency of cleaning, simplification of operation, expansion of functional and technological capabilities.

3 cl, 6 dwg

Description

The invention relates to filtering devices with the possibility of regeneration of filtering elements and can be used in energy, transport, petrochemical and other industries for fine purification of fuels, oils and other liquids.

Known automatic self-cleaning filter with regeneration of filter elements countercurrent washing The filter is a cylindrical body, divided by height by a partition with holes in the upper and lower chambers, along the axis of the holes on the partition are installed cylindrical filter elements. Filter elements are grouped, for example, in 6 groups of 5 filter elements in each group. The cleaned liquid enters through the pipe into the lower chamber, and the cleaned liquid is discharged from the upper chamber through the drain pipe.

The regeneration of filter elements is carried out counterflow alternately according to a predetermined scheme using a special device consisting of a rotary nozzle mounted on the shaft with a gear satellite nozzle located on it and a spring-loaded receiving sleeve. The location of the filter elements in the filter and the trajectory of the sleeve are such that for the regeneration of each of the filter elements it is necessary to turn the swivel nozzle at the same angular step as many times as there are filter elements in the filter.

RF patent No. 2064325, IPC B01D 37/04, published 1996-07-27.

A device providing countercurrent washing of filter elements is notable for its complexity in manufacturing and operation.

A device for filtering liquids is known, containing several filter modules installed in parallel and having a common drain line to remove sediment. The device has two reservoirs, the inner cavity of which is divided by the membrane into two volumes, one of which is connected to the network, and the other to the filtering modules. The regeneration of the filter elements is carried out by reverse water flow in turn, with a preliminary withdrawal of the filter element from the duty cycle.

French patent No. 2716385, IPC B01D 35/12, 1994.

The disadvantage of this device for filtering is also the complexity of its design.

An automatic filter is known in which filtration and backwashing occur simultaneously and independently from each other, without interrupting the work process. Several separately located filter chambers are placed in the filter housing. Each chamber has its own filter element. One of the chambers containing a contaminated filter is temporarily shut down and put into counter-current flushing mode, while the rest of the chambers, previously washed, take over the functions of a temporarily isolated chamber. In the course of work, one by one washing of all filter chambers is carried out. The backwash system uses ball valves

DE patent No. 10325525, IPC B01D 35/12, publ. 01/05/2005

The disadvantage is the design complexity and the inability to quickly access to replace or assess the state of filter elements without dismantling the main components.

A known block of fine filtration, which contains a housing, a lower chamber, nozzles of the input of the contaminated medium and the outlet of the purified medium, a backwash pipe, a cover, a support for the gear motor mounted on it and filter chambers with filter elements. Inside the housing is a chamber for a cleaned environment. The nozzles of the inlet of the contaminated medium and the outlet of the cleaned medium are located on the same axis in the upper part of the housing. The filter elements are made in a tubular shape, with a given filter fineness, having a porous structure, made of stainless steel mesh, subjected to sintering process, porosity of 30-80%, with filtration from the outside to the inside. An air receiver is installed on the lid, connected by a compressed air supply pipe to each of the filter chambers. A collector shaft is located along the axis of symmetry of the block, consisting of a stepped shaft and a collector attached to it by welding, located in the housing below the chamber for the cleaned environment. For the process of regeneration of the filter chamber, a positioning unit for the backwash pipeline is installed.

RF patent 2474461, IPC B01D 29/66, B01D 35/12, published 02/10/2013.

The disadvantage is the difficulty of operation and the inability to carry out regeneration by various methods.

The objective of the invention is to increase productivity and cleaning efficiency, simplifying operation, expanding functional and technological capabilities.

This problem is solved due to the fact that in a block-modular filtration unit equipped with a control system that represents a complex consisting of several technological components, including fine filters, shut-off and control valves, sensors used to control pressure, technological components included in the complex, fixed between the supporting elements ensuring their stability, fixed on a metal movable base, which is a sealed pallet, and include purified liquid collector, drainage collector, external backwash collector, gas backwash collector, air collector collector, while fine filters are connected respectively through the shutoff and control 4

valves with manifolds, each filter is a cylindrical filter chamber, the housing of which consists of upper and lower parts, between the flanges of which a tube sheet is installed, dividing the filter chamber into an upper conditionally clean and a lower conditionally dirty chamber, metal filter elements are installed in the through holes of the tube sheet , tubular shape.

In addition, the filter elements are several layers of corrugated filter materials on a perforated tube frame with a given filter fineness, for example 1-200 microns, having a porous structure made of stainless steel mesh that has undergone a sintering process, porosity of 30-80%, with filtration outside inside, which provides a large filtration area,

In addition, the filtering elements are made in the form of slotted gratings made in the form of a cylindrical spiral of a high-precision profile of a V-shape, fixed by welding on supporting elements at each point of their intersection. In this case, the supporting elements are located in the inner cavity of the filter element, and the V-shaped profile forms a screen with longitudinal slots of a strictly defined size with a tolerance of up to ± 15 μm.

The invention is illustrated by drawings.

FIG. 1 is a general view of a modular filtration unit;

FIG. 2 - fine filter;

FIG. 3 - Diagram of a block-modular filtration unit, operating mode;

FIG. 4 - Diagram of a block-modular filtration unit, regeneration by reverse current of a working fluid;

FIG. 5 - Diagram of a block-modular filtration unit, regeneration with washing liquid;

FIG. 6 - Diagram of a block-modular filtration unit, gas flow regeneration.

Block-modular filtration unit is a complex consisting of several technological components, including a control system (not shown in the drawings) with manual, automatic or combined control modes, fine filters 1, connected respectively through shut-off and control valves 2 to the collectors - collector of contaminated liquid 3, a purified liquid collector 4, a drainage collector 5, an external backwash collector 6, a gas backwash collector 7, an air collector nicks 8, wherein all process components are fixed between ensuring their stability supporting elements fixed to a metal movable frame 9, which is a sealed tray.

All collectors are equipped with sensors 10, which serve to control the pressure.

The fine filter 1 is a cylindrical filter chamber 11, the housing of which consists of upper and lower parts, between the flanges of which a tube sheet 12 is installed, dividing the filter chamber into an upper conditionally clean 13 and a lower conditionally dirty 14 chamber.

In the through holes of the tube sheet 12, metal filter elements 15 are installed in a tubular shape, which can be made of several layers of corrugated filter materials on a perforated tube frame with a given filter fineness, for example 1-100 microns, having a porous structure made of stainless steel mesh, subjected to sintering, porosity of 10-40%, with filtration from the outside to the inside, which provides a large filtration area.

The tubular filter elements 15 can be made in the form of slotted gratings made in the form of a cylindrical spiral of a high-precision profile of a V-shape, fixed by welding to supporting elements at each point of their intersection. In this case, the supporting elements are located in the inner cavity of the filter element, and the V-shaped profile forms a screen with longitudinal slots of a strictly defined size with a tolerance of up to ± 15 μm.

The number and relative position of the holes in the tube sheet correspond to the number and location of the filter elements 15.

A fitting 16 for the input of contaminated liquid is attached to the lower part of the housing through a pipeline for entering the contaminated liquid and shut-off and control valves 2 connected to the collector of the contaminated liquid 3.

To the upper part of the housing, above the location of the tube sheet 12, a fitting for the outlet of the purified liquid is attached 17, through the outlet pipe of the purified liquid and the shut-off and control valves 2 are connected to the manifold of the purified liquid 4.

The fine filter 1 is connected through an automatic valve 18 for the release of air with the collector of air vents 8.

The principle of operation of a modular filtration unit is as follows.

During the filtering mode (Fig. 3), the contaminated liquid under pressure from the collector of the contaminated product 3 through the pipe and the inlet 16 of the contaminated inlet enters the lower conditionally dirty chamber 14 and then through the filtering elements 15 in a tubular shape, with a given filter fineness, with filtering from the outside to , in the upper conditionally clean 13 filter chamber, while before starting to fill the chamber 13 with purified liquid through the automatic valve 18 air is removed, the air that enters the collector air vent 8.

Then the purified liquid through the outlet 17 of the outlet of the purified medium and the pipeline enters the manifold of the purified liquid 4 and then to the consumer.

During normal operation, part of the mechanical impurities remains on the outer surface of the filter elements 15, and the remaining impurities are in suspension in the cavity of the lower conditionally dirty chamber 14.

If the fine-block is contaminated, an increase in the pressure drop between the incoming contaminated liquid and the outgoing purified liquid occurs inside it.

Various regeneration options are available.

Regeneration by reverse current of the purified liquid (Fig. 4).

If the specified differential pressure level is exceeded in one of the fine filters 1, the control system puts this filter into regeneration mode. Moreover, the control system can automatically sequentially one by one turns off the fine filters 1 for regeneration. The backwash is carried out by filtered filtered liquid (internal backwash). When opening the corresponding shut-off and control valves 2 on the regenerated filter and on the drainage collector 5, a pressure drop is created and the purified liquid flows back into the conditionally clean chamber 13 of the regenerated filter, then into the internal cavity of the filter elements. Further, the purified liquid completely removes the sediment from the filter elements 15, which leaves the fine filter through the drainage collector 5. In this case, the filtering process by the remaining filters (not in the regeneration mode) does not stop, creating conditions for continuous operation of the unit.

Regeneration with flushing fluid (Fig. 5).

Wash fluid regeneration (external backwash) is performed if the loss of an expensive or critical cleaned fluid is unacceptable, or the outlet pressure becomes too low for effective backwash, or the flow rate is too low. This type of washing is carried out in the same order and under the same conditions, but the liquid supplied to the relatively clean filter chamber 13 from the outside, under the necessary pressure through the external backwash collector 6, acts as a washing.

Regeneration by gas flow (Fig. 6).

Regeneration by a gas flow is carried out in the same case and under the same conditions as regeneration by a flushing liquid; flushing is carried out due to the energy of compressed gas — nitrogen or other inert gas.

The modular filtration unit is easy to maintain, can operate in manual, automatic or combined control mode, does not require regular replacement of filter elements, and several types of regeneration are available during its operation: regeneration by reverse current of purified liquid, regeneration by washing liquid, regeneration by a stream of compressed gas.

Block-modular filtration unit can be involved in the filtration of: kerosene, diesel fuel, oil; alcohol, solvents; process liquids, food solvents, etc.

Claims (3)

1. Block-modular filtration plant, equipped with a control system, representing a complex consisting of several technological components, including fine filters, shut-off and control valves, sensors used to control pressure, characterized in that the technological components included in the complex are fixed between the supporting elements ensuring their stability, mounted on a metal movable base, which is a sealed pallet, and include the collector clean fluid, drainage manifold, external backwash manifold, gas backwash manifold, air manifold collector, while fine filters are connected respectively through shut-off and control valves with manifolds, each filter is a cylindrical filter chamber, the housing of which consists of upper and lower parts , between the flanges of which a tube sheet is installed, dividing the filter chamber into an upper conditionally clean and a lower conditionally dirty chamber, in the through holes of the tube sheet Ki installed metal filtering elements of a tubular shape. 2. Block-modular filtration installation according to claim 1, characterized in that the filter elements are several layers of pleated filter materials on a perforated tube frame with a given filter fineness, for example 1-200 microns, having a porous structure made of stainless steel mesh subjected to sintering process, porosity of 30-80%, with filtration from the outside to the inside, which provides a large filtration area. 3. Block-modular filtration unit according to claim 1, characterized in that the filter elements are made in the form of slotted gratings made in the form of a cylindrical spiral of a high-precision profile of a V-shape, fixed by welding to supporting elements at each point of their intersection, while the supporting elements are located in the inner cavity of the filter element, and the V-shaped profile forms a screen with longitudinal slots of a strictly defined size with a tolerance of up to ± 15 μm.

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