EP3724508B1 - Vorrichtung zum schutz von abwasserpumpen für nassspeicherkammern - Google Patents

Vorrichtung zum schutz von abwasserpumpen für nassspeicherkammern Download PDF

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Publication number
EP3724508B1
EP3724508B1 EP18842676.1A EP18842676A EP3724508B1 EP 3724508 B1 EP3724508 B1 EP 3724508B1 EP 18842676 A EP18842676 A EP 18842676A EP 3724508 B1 EP3724508 B1 EP 3724508B1
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EP
European Patent Office
Prior art keywords
separation chamber
pipe
wastewater
solid particles
rods
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.)
Active
Application number
EP18842676.1A
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English (en)
French (fr)
Other versions
EP3724508A2 (de
Inventor
Roman RUSNÁK
L'ubos KRIVUS
L'ubos HURBAN
Tomás MATULÍK
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.)
Aqua4um SRO
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Aqua4um SRO
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Filing date
Publication date
Application filed by Aqua4um SRO filed Critical Aqua4um SRO
Priority to PL18842676T priority Critical patent/PL3724508T3/pl
Priority to RS20220236A priority patent/RS63066B1/sr
Priority to SI201830608T priority patent/SI3724508T1/sl
Priority to HRP20220366TT priority patent/HRP20220366T1/hr
Priority claimed from PCT/SK2018/050016 external-priority patent/WO2019117821A2/en
Publication of EP3724508A2 publication Critical patent/EP3724508A2/de
Application granted granted Critical
Publication of EP3724508B1 publication Critical patent/EP3724508B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/16—Pumping installations or systems with storage reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • the technical solution relates to a device for protection of pumps in communal wastewater pumping stations, those from industry, agriculture, rain water or drinking and raw water.
  • pumps comprising a crushing device often suffer from rapid abrasion of crushing devices resulting in their non-functioning. Consequently, the pumps are blocked and damaged, which require physical cleaning of pumps or their maintenance.
  • Document US 5 954 484 A discloses a sewage lifting station having at least two solid waste collection chambers for receiving pumped solid waste-contaminated sewage.
  • the station has a collection tank for receiving pre-treated waste water flowing from the solid waste collection chambers via connection pipes.
  • Each solid waste collection chamber is connected to a pump to empty the collection tank via one of the connection pipes and solid waste collection chambers to pump the current of sewage into a pressure pipeline.
  • Waste water containing solid particles flowing through an inlet pipe into a wet accumulation chamber is directed to the separation chamber through a supply pipe. It further flows from the separation chamber through the solid particles separator via the biderictional pipe and through a pump into the wet accumulation chamber.
  • the solid particles separator captures solid particles and thereby they accumulate in the separation chamber. Particles having higher dimensional weight (sand, gravel) than a pumped medium accumulate at the bottom of the separation chamber due to sedimentation and they do not pass further onto a pump impeller.
  • pressurised water is pumped back from the wet accumulation chamber through the bidirectional pipe, solid particles separator and through the separation chamber into the discharge pipe and further to a sewerage network. Simultaneously, the separator is washed by reverse pumping of wastewater. A reversing valve precludes reverse flow of wastewater into the supply pipe.
  • a solid particle is understood to be a solid particle having dimensions exceeding a throughput rate of a pump impeller installed in a pumping station or a particle capable of causing abrasion of blades of the pump impeller.
  • Sand, gravel as well as fabrics, hygienic tissues, foils of various types, clusters of various materials and the likes can form the solid particle.
  • the separation chamber is shaped as a cylinder that may be arranged either vertically or horizontally.
  • the separation chamber comprises an upper part, bottom and side wall/walls.
  • the separation chamber further comprises openings for respective pipes.
  • a bidirectional pipe and a discharge pipe are attached in a lower part of the separation chamber so that their orifices are situated opposite each other across the separation chamber.
  • the lower part of the separation chamber is meant to be a space immediately above the bottom of the separation chamber.
  • the supply pipe is situated so that it opens into the separation chamber on its top.
  • the reversing valve may consist of for example a seat and a float ball. During pumping water pressure presses the float ball into the seat preventing backflow of wastewater.
  • the discharge pipe directs from a side wall of the chamber first obliquely upward at an angle of 30° to 70° with respect to the bottom of the separation chamber, more preferably at an angle of 50° and then it is curved so that it is directed perpendicularly upward. It is an advantage of said embodiment that the pipe does not include a right angle and solid particles are discharged through the discharge pipe without any problems by water pressure.
  • the bidirectional pipe is branched.
  • One branch opens through a side wall into the lower part of the separation chamber, like in the previous case, and the other branch opens through the side wall into the upper part of the separation chamber.
  • the upper part of the separation chamber is understood as a space of the separation chamber below the reversing valve.
  • Both branches are attached to the separation chamber through an individual solid particles separator. Branching of the bidirectional pipe into two height levels results in enhancement of hydraulic characteristics in the separation chamber. After the pump is switched on, pressurised flow is partially directed through one branch of the bidirectional pipe to the upper part of the separation chamber and a part of the pressurised flow is directed through another branch of the bidirectional pipe to the lower part of the separation chamber.
  • the supply pipe is in the form of a perforated inlet trough. From a certain height walls of the inlet trough are provided with filtration perforations.
  • the function of the trough is on one hand directing water into the separation chamber, but simultaneously also separation and filtration of storm sewage through perforations in the side walls of the trough. Size of perforations in the side walls of the trough is dimensioned according to the throughput rate of the pump impeller installed in the pumping station. Arrangement of perforations on the walls, their amount and design are determined by the value of the maximal critical inlet into the pumping station.
  • an average daily flow is securely let into the separation chamber through the inlet trough and eventual critical flow is passed through the filtration perforation directly into the wet accumulation chamber in order to avoid flooding of the separation chamber.
  • Filtration perforations prevent passing the solid particles of sizes greater than the throughput rate of the pump impeller into the accumulation chamber and said solid particles are passed through into the separation chamber by the trough.
  • the accumulation chamber may comprise a plurality of pumps, in that case each pump is provided with a separate device according to the present solution. Said devices may, however, share one supply pipe or inlet trough.
  • a sieve having opening sizes dimensioned according to the throughput rate of a pump impeller may be a solid particles separator.
  • a disadvantage of the sieve is that it is quickly clogged, in particularly, when there are fabrics or disposable hygienic tissues and the like in wastewater. In addition, when wastewater is pumped reversely the separator is only partially washed as the said fabrics tend to enmesh into the sieve.
  • a device may comprise a rod solid particles separator.
  • the rod separator consists of a frame provided about the inner circumference with rods having at minimum two or three or more lengths.
  • the frame may preferably be of an annular shape.
  • the outer circumference of the grame may be of a square, rectangular or other geometric shape.
  • Rods are arranged alternately (long, short, long, short) on the frame. Rods protrude radially from the body plane onto one side at an angle in such a manner that a surface that longitudally intersects all rods forms a truncated cone or truncated pyramid (frustum).
  • Rods are arranged so that a space between two neighboring rods and at the same time space between free ends of any two long rods does not exceed the size the throughput rate of the pump impeller is dimensioned for.
  • a distance between the rods is in the range of 15 to 100 mm.
  • Rod length may be for example 20 and 50 mm, 20 and 60mm, 15 and 60mm, 20 and 80mm and the like. Length of the rods primarily depends on the throughput rate of the pump impeller.
  • Said rod solid particles separator is positioned between a flange of the bidirectional pipe and a flange of the separation chamber in a way the rods are directed into the space of the separation chamber.
  • the rod separator may be preferably provided with means for fastening in the flange e.g. in the form of openings.
  • the rod separator may be preferably provided with at least one groove for mounting a sealing.
  • the pump is commonly positioned at the bottom of the wet accumulation chamber and according to the present technical solution it may be attached to bidirectional pipe of the device by means of a dismountable coupling through a pipe of the pump.
  • the discharge pump of the device may be connected by a dismountable coupling to the discharge pump of the pumping station. Lengths of individual pipes depend on a depth of the pumping station and a distance of the inlet pipe of wastewater from the bottom of the pumping station.
  • the bidirectional pipes and the pipe of the pump as well as the discharge pipe and the discharge pipe of the pumping station are connected with dismountable couplings at the separation chamber proximity.
  • the device according to the present technical solution provides for the pump not to come into contact with solid particles that cause its excessive wearing-off, clogging and breakdowns.
  • the device according to the present technical solution provides a plurality of economic and ecological advantages, namely the device can be installed into wet chambers of new as well as in a majority of existing pumping stations without a requirement of building modifications of the pumping stations. Accordingly, in majority cases the device requires no other than already existing space in the pumping station, nor further construction works. After installation, frequency of dispatching of operator's maintenance workers to the pumping stations for pump cleaning, maintenance and repair purposes decreases, pump life increases, the need for handling the rakings is eliminated resulting in reduction of ecological burden of environment in the surrounding of the pumping station.
  • Example 1 (not a part of the present invention):
  • Fig. 1 shows a device for protection of wastewater pumps comprising separation chamber 4 substantially in the form of a perpendicularly positioned cylinder. Said separation chamber is provided in its lower part with discharge pipe 9 of the chamber that is further connected by a dismountable coupling onto discharge pipe 9.1 of a pumping station, that is further connected to sewerage network 11 .
  • the device further comprises supply pipe 2, connected to inlet pipe 1 .
  • Supply pipe 2 is from another side connected from the top to separation chamber 4 to inlet wastewater into separation chamber 4.
  • a reversing valve for preventing reverse flow of wastewater into supply pipe 2 is positioned between supply pipe 2 and separation chamber 4.
  • Said valve consists of seat 3 arranged on supply pipe 2 and corresponding float ball 5 positioned in separation chamber 4.
  • Bidirectional pipe 7 is connected on chamber 4 in the lower part of separation chamber 4 opposite the orifice of discharge pipe 9 of the chamber. Said bidirectional pipe 7 is connected to pump pipe 7.1 and connects the device with pump 10 positioned in wet accumulation chamber 8.
  • Rod separator 6 of solid particles is arranged between separation chamber 4 and bidirectional pipe 7. The role of the rod separator 6 of solid particles is separating solid particles contained in wastewater in separation chamber 4.
  • wastewater flows from separation chamber 4, through rod solid particles separator 6 via bidirectional pipe 7 into pump 10 and consequently to wet accumulation chamber 8.
  • Solid particles contained in wastewater are filtrated by solid particles separator 6 and are accumulated at the bottom of separation chamber 4 .
  • pump 10 is switched on.
  • wastewater from wet accumulation chamber 8 is pumped back by pump 10 through bidirectional pipe 7 and rod solid particles separator 6 into separation chamber 4.
  • An increasing level of pumped wastewater in separation chamber 4 presses float ball 5 onto seat 3, closing the inlet into supply pipe 2.
  • Pumped waster continues further from separation chamber 4 into chamber discharge pipe 9 and further to pump station discharge pipe 9.1.
  • Solid particles accumulated at the bottom of separation chamber 4 are also discharge from separation chamber 4 by pressure of pumped water into chamber discharge pipe 9 and through pump station discharge pipe 9.1 they are further transported into sewerage network 11.
  • Fig. 2 shows an embodiment of the device for pump protection according to the present invention.
  • the device comprises all parts of the device according to Example 1.
  • the device differs from the device according to Example 1 in that bidirectional pipe 7 is branched.
  • One branch opens into a lower part of separation chamber 4, as in Example 1, and another branch opens into an upper part of separation chamber 4.
  • Both branches are connected to the separation chamber through a separate solid particles separator 6.1, 6.2 .
  • the supply pipe 2 is in the form of a perforated inlet trough.
  • Fig. 3 shows a rod solid particles separator which can be used in the device for protection of waste water pumps for wet accumulation chambers according to the present invention, consisting of frame 12 of annular shape where said ring is about its inner circumference provided with rods 13 and 14 of at least two lengths.
  • the rods are on the frame, they are arranged alternately (long, short, long, short). Simultaneously, the rods radially protrude from the frame plane into one side at an angle in a way a plane intersecting their surfaces forms a truncated cone (frustum).
  • the rods are arranged so that a space between any two rods does not exceed the size the throughput rate of the pump impeller is dimensioned for. In practice the distance between the rods is in the range of 15 to 100 mm.
  • FIG. 4 shows connection of the devices according to the present technical invention in a wet accumulation chamber containing two pumps.
  • the devices are similar to the device described in Example 2.
  • the devices differ from the device in Example 2 in that they comprise only one common supply pipe 2 in the form of a perforated inlet trough.
  • the inlet trough is connected to inlet pipe 1. From a certain height walls of the inlet trough are provided with filtration perforations. Size of the perforations is dimensioned according to the throughput rate of pump impeller 10 and 10'. Arrangement of perforations in the side walls of the inlet trough are determined by a value of the maximal critical inlet into the pumping station. Accordingly, the perforations are arranged in such height of the trough wall that an average daily flow is securely let in to separation chambers 4 and 4' through the inlet trough and eventual critical flow is passed directly into wet accumulation chamber 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sewage (AREA)

Claims (6)

  1. Vorrichtung zum Schutz von Abwasserpumpen für Nasssammelkammern, dadurch gekennzeichnet, dass sie umfasst:
    - eine Trennkammer (4), die mit einem Abflussrohr (9) zum Ableiten von Abwasser in ein Kanalisationsnetz versehen ist,
    - ein mit der Trennkammer (4) verbundenes Zufuhrrohr (2), um Feststoffpartikel enthaltendes Abwasser in die Trennkammer (4) zuzuführen,
    - ein Umschaltventil, das zwischen dem Zufuhrrohr (2) und der Trennkammer (4) angeordnet ist, um einen Rückfluss von Abwasser ins Zufuhrrohr (2) zu verhindern,
    - ein bidirektionales Rohr (7), das mit der Trennkammer (4) verbunden ist, zum Verbinden der Trennkammer (4) mit einer Pumpe (10), zum Zuführen von Abwasser aus der Trennkammer (4) durch die Pumpe (10) in eine Nasssammelkammer (8) und zum Rückfluss von Abwasser aus der Nasssammelkammer (8) durch die Pumpe (10) und die Trennkammer (4) in das Abflussrohr (9),
    - einen Feststoffabscheider (6), der zwischen der Trennkammer (4) und dem bidirektionalen Rohr (7) angeordnet ist, um im Abwasser enthaltene Feststoffpartikel in der Trennkammer (4) zurückzuhalten, und wobei
    - das bidirektionale Rohr (7) und das Abflussrohr (9) so angeordnet sind, dass sie in einem unteren Teil der Trennkammer (4) einander gegenüberliegend in die Trennkammer (4) münden, und wobei
    - das bidirektionale Rohr (7) verzweigt ist, wobei ein Zweig in den unteren Teil der Trennkammer (4) und der zweite Zweig in den oberen Teil der Trennkammer (4) mündet, wobei beide Zweige mit der Trennkammer durch einen separaten Feststoffabscheider (6.1) und (6.2) verbunden sind,
    dadurch gekennzeichnet, dass das Zufuhrrohr (2) die Form eines perforierten Einlasses hat.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Zufuhrrohr (2) von oben an die Trennkammer (4) angeschlossen ist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Umschaltventil aus einem Sitz (3) und einer entsprechenden in der Trennkammer (4) positionierten Schwimmerkugel (5) besteht.
  4. Vorrichtung nach einem beliebigen der vorherigen Ansprüche, dadurch gekennzeichnet, dass sich das Abflussrohr (9) von der Trennkammer (4) schräg nach oben in einem Winkel von 30° bis 70° zum Boden der Trennkammer (4) erstreckt, vorzugsweise in einem Winkel von 50°.
  5. Vorrichtung nach einem beliebigen der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Feststoffabscheider (6, 6.1, 6.2) einen Rahmen (12) enthält, der an seinem Innenumfang mit Stangen (13, 14) von mindestens zwei Längen versehen ist, bei denen die Stäbe abwechselnd am Rahmen angeordnet sind, langer Stab (13), kurzer Stab (14), und wo Stäbe (13, 14) radial schräg zur Rahmenebene auf einer Seite so hervorstehen, dass eine Fläche, die alle Stäbe (13 und 14) in Längsrichtung schneidet, einen Kegelstumpf oder eine Pyramide (einen Pyramidenstumpf) bildet und wo die Stäbe (13, 14) so angeordnet sind, dass ein Raum zwischen beliebigen zwei benachbarten Stäben (13, 14) und ein Raum zwischen freien Enden zweier beliebiger langer Stangen (13) die Größe nicht überschreitet, für die der Durchsatz des Pumpenlaufrades ausgelegt ist.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Rahmen (12) ringförmig ist.
EP18842676.1A 2017-12-13 2018-12-11 Vorrichtung zum schutz von abwasserpumpen für nassspeicherkammern Active EP3724508B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL18842676T PL3724508T3 (pl) 2017-12-13 2018-12-11 Urządzenie do zabezpieczania pomp ściekowych w mokrych komorach akumulacyjnych
RS20220236A RS63066B1 (sr) 2017-12-13 2018-12-11 Uređaj za zaštitu pumpi za otpadne vode za vlažne akumulacione komore
SI201830608T SI3724508T1 (sl) 2017-12-13 2018-12-11 Naprava za zaščito črpalk za odpadne vode za mokre zbiralne komore
HRP20220366TT HRP20220366T1 (hr) 2017-12-13 2018-12-11 Uređaj za zaštitu pumpi za otpadne vode za vlažne akumulacijske komore

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SK501192017 2017-12-13
PCT/SK2018/050016 WO2019117821A2 (en) 2017-12-13 2018-12-11 Device for protection of wastewater pumps for wet accumulation chambers

Publications (2)

Publication Number Publication Date
EP3724508A2 EP3724508A2 (de) 2020-10-21
EP3724508B1 true EP3724508B1 (de) 2021-12-22

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ID=65269026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18842676.1A Active EP3724508B1 (de) 2017-12-13 2018-12-11 Vorrichtung zum schutz von abwasserpumpen für nassspeicherkammern

Country Status (8)

Country Link
EP (1) EP3724508B1 (de)
ES (1) ES2909173T3 (de)
HR (1) HRP20220366T1 (de)
HU (1) HUE057804T2 (de)
LT (1) LT3724508T (de)
PL (1) PL3724508T3 (de)
RS (1) RS63066B1 (de)
SI (1) SI3724508T1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4316626A1 (de) * 2022-08-04 2024-02-07 Chung-Hyo Kim Filteranordnung und fremdstoffausstossvorrichtung damit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4316626A1 (de) * 2022-08-04 2024-02-07 Chung-Hyo Kim Filteranordnung und fremdstoffausstossvorrichtung damit

Also Published As

Publication number Publication date
SI3724508T1 (sl) 2022-04-29
RS63066B1 (sr) 2022-04-29
HUE057804T2 (hu) 2022-06-28
ES2909173T3 (es) 2022-05-05
EP3724508A2 (de) 2020-10-21
LT3724508T (lt) 2022-04-11
HRP20220366T1 (hr) 2022-05-13
PL3724508T3 (pl) 2022-05-02

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