EP3773979A1 - Filtering apparatus, in particular for closed-circuit of heating plants - Google Patents

Filtering apparatus, in particular for closed-circuit of heating plants

Info

Publication number
EP3773979A1
EP3773979A1 EP18723955.3A EP18723955A EP3773979A1 EP 3773979 A1 EP3773979 A1 EP 3773979A1 EP 18723955 A EP18723955 A EP 18723955A EP 3773979 A1 EP3773979 A1 EP 3773979A1
Authority
EP
European Patent Office
Prior art keywords
filtering
valve
hollow body
filtering elements
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18723955.3A
Other languages
German (de)
French (fr)
Inventor
Marco Caleffi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caleffi SpA
Original Assignee
Caleffi SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caleffi SpA filed Critical Caleffi SpA
Publication of EP3773979A1 publication Critical patent/EP3773979A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
    • B01D29/41—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
    • B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
    • B01D29/6446—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/461—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles

Definitions

  • FIGS. 6,7 are perspective views of the component of figure 5, showing the fitting of a detail of the component of figure 5;
  • figures 8,9 are axial section views of other two components of the apparatus of figure 1;
  • the body 11 is provided with a sludge drain conduit 17, along which a shut off valve 18 controlled manually by a lever 18A is fitted.
  • the hollow shaft can be driven by a gear motor rather than by a handwheel.
  • the high-pressure water spraying system and the nonreturn valve on the outlet conduit can be omitted.
  • the filtered water flowing in a counterflow from the outlet can be used, which filtered water traverses the hollow conduit and the textile coverings of the filtering discs from the inside to the outside, the simultaneous rotatory driving of the filtering discs remaining. A combined action of washing and brushing the textile covers is thus obtained.
  • the resulting dirty fluid is drained through the drain conduit.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A dirt-separating filtering apparatus (10) has a hollow body (11) provided with manually controlled valves (14) for controlling flow delivering of dirty fluid and draining the hollow body (11), a series of filtering elements (26) inside the hollow body (11), a series of brushes (35) for brushing the filtering elements (26), and a drive (24) for rotating the filtering elements (26) for brushing. The apparatus can be commanded, controlled and switched between a step of filtering and a step of cleaning the filtering elements (26). The apparatus is very simple, effective and low cost.

Description

FILTERING APPARATUS, IN PARTICULAR FOR CLOSED-CIRCUIT OF HEATING PLANTS
BACKGROUND OF THE INVENTION
5
The object of the present invention is a dirt- separating filtering apparatus, intended for being installed particularly, but not exclusively, in closed-circuit heating plants.
PRIOR ART
10
Dirt-separating filtering apparatuses are known that are installed in closed-circuit heating plants for the purpose of ensuring the cleaning of the hydraulic circuit of the heating plant.
15 These apparatuses normally provide a cylindrical body closed by a removable lid and
one or more filtering cartridges inside the cylindrical body. The cylindrical body is provided with flanged connections for the flowing in and out of the heat-carrier fluid to be filtered and a sludge drain cock. These apparatuses also have other components that are not disclosed here.
2 0
The filtering cartridges inside these apparatuses retain the impurities flowing in the hydraulic circuit so as to avoid possible damage to the various components of the hydraulic circuit such as boilers, pumps, valves, radiators and others.
25 The dirt-separating filtering apparatuses disclosed above have various drawbacks.
In order to clean the filtering cartridges, it is necessary to demount the lid and wash each cartridge. This is highly time-consuming, in particular because the lid is normally fixed with several bolts, and this entails maintenance costs of a certain
30 amount.
During operation of the hydraulic circuit, accumulation over time of dirt causes an increase of pressure drop, this jeopardizing the very operation of the hydraulic circuit. The filtering capacity of the filtering cartridges is not high.
The cost of these apparatuses is relatively high and the overall dimensions are rather great.
Further, a wide range of models is required to adapt to various types and dimensions of hydraulic circuit, and this involves high production, storage and management costs.
OBJECT OF THE INVENTION
The object of the present invention is to propose a dirt- separating filtering apparatus that is able to overcome the drawbacks disclosed above.
SHORT DESCRIPTION OF THE INVENTION
This object is achieved by a dirt- separating filtering apparatus in accordance with claim 1.
SHORT DESCRIPTION OF THE DRAWINGS
In order to better understand the invention, a description is given below of a non limiting exemplary embodiment thereof, illustrated in the attached drawings in which:
figure 1 is a perspective view of a dirt- separating filtering apparatus according to the invention;
figure 2 is a perspective view from the opposite side of the apparatus of figure 1; figure 3 is an axially sectioned lateral view of the apparatus of figure 1;
figure 4 is a frontal section view of the apparatus of figure 1;
figure 5 is a radially sectioned perspective view of a component of the apparatus of figure 1 ;
figures 6,7 are perspective views of the component of figure 5, showing the fitting of a detail of the component of figure 5; figures 8,9 are axial section views of other two components of the apparatus of figure 1;
figure 10 shows schematically the apparatus of figure 1;
figures 11-14 show, in the section view of figure 3, various operating steps of the apparatus of figure 1.
DETAILED DESCRIPTION OF THE INVENTION
The dirt-separating filtering apparatus illustrated in figure 1, indicated generally by 10, is intended in particular for being installed in closed-circuit heating plants.
General reference is made below to figures 1-4.
The apparatus 10 provides a barrel shape hollow body 11, with a horizontal axis, provided with four supporting legs 12.
The body 11 is provided above with an inlet conduit 13 on which a shut-off valve 14 controlled manually by a knob is fitted. The conduit 13 is intended for example for being connected to the heat generator of the heating plant.
The body 11 is further provided axially with an outlet conduit 15 on which a nonreturn valve 16 is fitted to prevent the return of fluid to the body 11. The conduit 15 is intended for being connected to the heat exchangers of the heating plant.
Below, the body 11 is provided with a sludge drain conduit 17, along which a shut off valve 18 controlled manually by a lever 18A is fitted.
In the upper part of the body 11, an air inlet valve 19 and an air vent valve 20 are also fitted, which are illustrated in detail in figures 8,9 respectively.
The apparatus 10 is provided with a gauge 21, fitted laterally on the hollow body 11, which is suitable for measuring the pressure inside the hollow body 11, and with a gauge 22, fitted on the outlet of the nonreturn valve 16, which is suitable for measuring the pressure inside the outlet conduit 15 downstream of the nonreturn valve 16.
Inside the hollow body 11, a hollow shaft 23 is fitted axially in a rotating manner. At one end, the hollow shaft 23 is connected to a handwheel 24 with a revolving grip 24 A, arranged outside the body 11 ; at the other end, the hollow shaft 23 is connected to the outlet conduit 15 by a rotating joint 25.
A series of filtering discs 26, which rotate integrally with the shaft 23, are fitted removably on the hollow shaft 23.
The configuration of each filtering disc 26 is illustrated in figures 5-7. Each filtering disc 26 is formed by a circular frame 27 to which a textile covering 28 is fitted inside which a chamber 29 is formed. The dimension of the mesh of the textile can be of the order of a few tens of microns to provide suitable filtration.
Two staples 30, each of which is provided with seats 31 into which permanent magnets 32 are inserted, are fixed to the frame 27 at opposite positions.
The chamber 29 of each filtering disc 26 is in communication with the inside of the hollow shaft 23 through openings 33 obtained in the shaft 23, which are visible in figure 3.
With reference to figure 4, inside the hollow body 11, in the upper part thereof, a longitudinal section bar 34 is fixed that runs parallel to the axis of the body 11. To the section bar 34 a series of removable brushes 35 is fixed; each of the two external end brushes 35 is in contact with the textile covering of a respective external face of one of the two external filtering discs 26 and extends over the entire radial extent of the covering; each of the inner brushes 35 is in contact with the textile coverings of the two external faces of two respective opposite internal filtering discs 26 and extends over the entire radial extent of the coverings.
Above the filtering discs 26, a longitudinal manifold 36 is fixed, parallel to the axis of the body 11; in the lower part of the manifold 36 a series of spraying nozzles 37 is fitted at the filtering discs 26, as shown in figure 4; each nozzle 37 is directed between two respective adjacent filtering discs 26. The manifold 36 is connected to the water supply by a valve 38 controlled manually by a lever 38 A. Between the manifold 36 and the valve 38 a nonreturn valve 39 is arranged, which is shown separated but can be integrated into the valve 38.
In figure 10, the apparatus 10 is shown schematically with the various devices disclosed above.
The operation of the dirt- separating filtering apparatus 10 is disclosed below, with particular reference to figures 11-14, which show various operating steps of the apparatus 10, and with reference also to the preceding figures.
Fig. 11 shows the apparatus 10 in a normal filtering operating step. The valve 14 is open, whereas the valves 18 and 38 are closed. As indicated by the arrows, the dirty fluid coming from the heating plant flows inside the hollow body 11 through the inlet conduit 13, flows through the textile coverings 28 of the filtering discs 26, flows through the inside of the hollow shaft 23 and flows out of the outlet conduit 15. The impurities in the fluid are retained on the external faces of the filtering discs 26 by the textile coverings 28 of the discs and thus remain inside the hollow body 11; the ferrous particles in the dirty fluid are retained on the external faces of the filtering discs 26 by the magnets 32 arranged on the periphery of the discs 26 and thus also remain inside the hollow body 11; the thus filtered fluid on the other hand reaches the other parts of the plant through the outlet conduit 15.
Fig.12 shows the apparatus 10 in the step of emptying the hollow body 11. The valve 18 is open, whereas the valves 14 and 38 are closed. In this step the entering of the dirty fluid is stopped, and on the other hand the dirty fluid in the hollow body 11 is drained through the drain conduit 17, as indicated by the arrow. The nonreturn valve 16 prevents the return of filtered fluid to the hollow body 11. The valve 19 opens for entering air into the hollow body 11 so as to enable the dirty fluid to be drained. The entry of air through the valve 19 is illustrated in detail by the arrows in figure 8: the valve 19 has a shutter 40 inside maintained in a closed position against a seat 41 by a calibrated spring 42; when the outer pressure exceeds the pressure inside the hollow body 11 by a set value, the shutter 40 moves away from the seat 41, counteracting the action of the spring 42, allowing the entry of air.
Fig. 13 shows the apparatus 10 during the step of cleaning the filtering discs 26 through clean water. The valves 18 and 38 are open whilst the valve 14 is closed. In this step, as indicated by the arrows, the water coming from the water supply flows into the manifold 36 and flows out of the nozzles 37 so as to spray high pressure water onto the filtering discs 26 and onto the brushes 35 below. At the same time, the handwheel 24 rotates the hollow shaft 23 and the filtering discs 26 therewith; in the rotatory movement of the filtering discs 26 the fixed brushes 35 slide along the entire annular external surface of the external faces of the filtering discs 26. This combined spraying and sliding action enables the settled dirt to be removed from the external faces of the filtering discs 26. The dirty fluid that accumulates in the hollow body 11 is drained through the drain conduit 17, as indicated by the arrow. As water and dirt accumulate in the body 11, the air in the hollow body 11 exits the valve 20 as illustrated in detail by the arrows in figure 9: the valve 20 has a float 43 inside that drives a shutter 44; when the float 43 is in a lower position because of the absence of fluid in the valve 20 the shutter 44 is open and enables the air to escape outside; when the fluid flows into the valve 20 the float 43 rises and closes the shutter 44. The nonreturn valve 39 prevents dirty water returning to the water supply.
Fig.14 shows the apparatus 10 during the step of restoring normal filtering operating conditions, after cleaning of the filtering discs 26 and draining of the dirty fluid coming from cleaning. In this step the valve 38 is open, whereas the valves 14 and 18 are closed. The supply water, as indicated by the arrows, is sprayed inside the hollow body 11 through the nozzles 37 and the hollow body 11 fills gradually with supply water. When the pressure detected by the gauge 21 inside the hollow body 11 corresponds to the pressure detected by the gauge 22 at the outlet of the hollow body 11 downstream of the nonreturn valve 16, the valve 38 is closed and the normal filtering operation step of the apparatus 10 can restart as seen above with reference to figure 11. Alternatively, loading during the restoral step can be performed directly with the plant fluid of the heating plant, by the opening controlled by the valve 14, while keeping the valves 18,38 closed.
The operator can command and control all the various steps disclosed above by moving the valves 14,18,38 manually and monitoring the pressure by the gauges 21,22.
The disclosed and illustrated apparatus 10 has several advantages.
In order to clean the filtering discs 26, it is not necessary to perform any disassembling operation. This means time saving and low maintenance costs.
The possibility of cleaning the filtering discs 26 frequently, in view of the ease and speed of the operation, does not allow dirt to accumulate on the filtering discs and thus avoids pressure drops during operation of the plant.
The filtering capacity of the filtering discs is high.
The cost of the apparatus 10 is low and the overall dimensions are small.
A wide range of models is not required to adapt to the various types and dimensions of plant, and this reduces production, storage and management costs.
It is clear that variants on and/or additions to what has been disclosed above and illustrated in the attached drawings can be provided.
The hollow body can have a vertical axis.
The configuration of the hollow body and of the various illustrated components of the apparatus can vary according to needs. For example, the filtering discs can be replaced by filtering elements with a different configuration, which perform the same function.
The arrangement of the components can be different from what has been illustrated, always depending on needs.
The number and the arrangement of the magnets on each filtering disc can vary.
The hollow shaft can be driven by a gear motor rather than by a handwheel. In a simplified alternative solution, the high-pressure water spraying system and the nonreturn valve on the outlet conduit can be omitted. For washing, the filtered water flowing in a counterflow from the outlet can be used, which filtered water traverses the hollow conduit and the textile coverings of the filtering discs from the inside to the outside, the simultaneous rotatory driving of the filtering discs remaining. A combined action of washing and brushing the textile covers is thus obtained. The resulting dirty fluid is drained through the drain conduit.
The disclosed and illustrated apparatus is particularly used in closed-circuit heating plants, but can also be used in other types of plant, for example sanitary plants, because it is possible to use filtering elements with different filtering capacities.

Claims

1. Dirt-separating filtering apparatus (10), in particular for filtering fluid of closed-circuit heating plants, comprising a hollow body (11) provided with an inlet conduit (13), an outlet conduit (15), and a drain conduit (17), a first manually controlled valve (14) for opening or closing the inlet conduit (13) and a second manually controlled valve (18) for opening or closing the drain conduit (17), a series of filtering elements (26) inside the hollow body (11) for filtering entering dirty fluid so as to obtain filtered exiting fluid, a series of brushes (35) in contact with the filtering elements (26) for brushing the filtering elements (26), driving means (24) for making a relative brushing movement between the brushes (35) and the filtering elements (26), the driving of said valves (14,18) and said driving means (24) enabling the apparatus to be commanded, controlled and switched between a step of filtering and a step of cleaning the filtering elements (26).
2. Apparatus according to claim 1, wherein the filtering elements (26) are mounted on a hollow shaft (23) through which the filtered fluid flows to the outlet conduit (15).
3. Apparatus according to claim 2, wherein the driving means (24) rotates the hollow shaft (23) and wherein the brushes (35) are fitted inside the hollow body (11) so as to be fixed to the rotating filtering elements (26) and so as to be able to be removed for replacement.
4. Apparatus according to claim 3, wherein the driving means comprises a handwheel (24) connected to the hollow shaft (23).
5. Apparatus according to any one of claims 2-4, wherein each filtering element (26) is formed by a frame (27) to which a textile covering (28) is fitted for filtering, inside which a chamber (29) is formed and wherein the chamber (29) of each filtering element (26) is in communication with the inside of the hollow shaft (23) through openings (33) obtained in the hollow shaft (23).
6. Apparatus according to any preceding claim, wherein each filtering element (26) is disc-shaped.
7. Apparatus according to any preceding claim, wherein magnetic means (30-32) is provided that is fitted to the filtering elements (26) to attract and retain on the filtering elements (26) the ferrous particles present in the fluid.
8. Apparatus according to claim 7, wherein the magnetic means comprises a series of cases (30), fixed annularly along the surface of the filtering elements (26), inside each of which one or more permanent magnets (32) are inserted removably.
9. Apparatus according to any preceding claim, wherein spraying means (37) are provided inside the hollow body (11) that are supplied by washing fluid through a third valve (38) for washing the filtering elements (26) and the brushes (35).
10. Dirt-separating filtering apparatus according to any preceding claim, wherein a first gauge (21) is provided for measuring the pressure inside the hollow body (11) and a second gauge (22) is provided for measuring the pressure at the outlet of the hollow body (11), to command, control and switch the apparatus according to the pressure detected by the gauges (21,22).
11. Apparatus according to claim 10, wherein upstream of the second gauge (22) a nonreturn valve (16) is fitted.
12. Apparatus according to claim 9, wherein downstream of the third valve (38) a nonreturn valve (39) is fitted.
13. Apparatus according to any preceding claim, wherein in the upper part of the hollow body (11) an air inlet valve (19) is fitted.
14. Apparatus according to any preceding claim, wherein in the upper part of the hollow body (11) an air vent valve (20) is fitted.
15. Apparatus according to any one of claims 9-14, wherein in the filtering step the first valve (14) is opened, whilst the second and the third valve (18,38) are closed, such that the dirty fluid enters inside the hollow body (11) through the inlet conduit (13), flows through the filtering elements (26) for filtration and flows out of the outlet conduit (15).
16. Apparatus according to any one of claims 9-15, wherein in the step of cleaning the filtering elements the first valve (14) is closed, whereas the second and the third valve (18,38) are opened, and a relative brushing movement is activated between the brushes (35) and the filtering elements (26), such that the spraying means (37) sprays high-pressure washing fluid onto the filtering elements (26) and onto the brushes (35) and simultaneously the reciprocal movement between the brushes (35) and the filtering elements (26) causes the removal of the settled dirt from the filtering elements (26), the dirty fluid that has accumulated in the hollow body (11) draining through the drain conduit (17).
17. Apparatus according to any one of claims 9-16, wherein in a step of emptying the hollow body (11) the first and the third valve (14,38) are closed, whilst the second valve (18) is open, to drain the dirty fluid in the hollow body (11) through the drain conduit (17).
18. Apparatus according to any one of claims 10-17, wherein in a step of restoring normal filtration operating conditions, after cleaning the filtering elements (26), the first and the second valve (14,18) are closed, whilst the third valve (38) is opened, so as to fill the hollow body (11) with fluid until the pressure inside the hollow body (11) detected by the first gauge (21) corresponds to the pressure at the outlet of the hollow body (11) detected by the second gauge (22).
19. Apparatus according to any one of claims 10-17, wherein in a step of restoring normal filtration operating conditions, after cleaning the filtering elements (26), the first valve (14) is opened, whilst the second and the third valve (18,38) are closed, so as to fill the hollow body (11) with fluid until the pressure inside the hollow body (11) detected by the first gauge (21) corresponds to the pressure at the outlet of the hollow body (11) detected by the second gauge (22).
EP18723955.3A 2018-03-27 2018-03-27 Filtering apparatus, in particular for closed-circuit of heating plants Withdrawn EP3773979A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/052083 WO2019186232A1 (en) 2018-03-27 2018-03-27 Filtering apparatus, in particular for closed-circuit of heating plants

Publications (1)

Publication Number Publication Date
EP3773979A1 true EP3773979A1 (en) 2021-02-17

Family

ID=62148419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18723955.3A Withdrawn EP3773979A1 (en) 2018-03-27 2018-03-27 Filtering apparatus, in particular for closed-circuit of heating plants

Country Status (2)

Country Link
EP (1) EP3773979A1 (en)
WO (1) WO2019186232A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111991862A (en) * 2020-08-11 2020-11-27 高博 Avoid foam adhesion to cause waste water treatment auxiliary device who blocks up on filter screen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR339200A (en) * 1903-12-02 1905-01-05 Alexandre Teel Compact filter with large filtering surface and easy cleaning
US2621798A (en) * 1951-07-13 1952-12-16 Aloysius C Kracklauer Clean-out mechanism for filters and the like
US3497452A (en) * 1968-09-09 1970-02-24 Kostas Savas Arvanitakis Method and apparatus for clarifying a liquid
FI126460B (en) * 2013-05-31 2016-12-30 Outotec Finland Oy Filter element, filter device and method for manufacturing a filter element

Also Published As

Publication number Publication date
WO2019186232A1 (en) 2019-10-03

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