EP0484575A1 - Dispositif pour pomper de la vase et pour ajouter un agent d'aide pour un filtrage dosé - Google Patents

Dispositif pour pomper de la vase et pour ajouter un agent d'aide pour un filtrage dosé Download PDF

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Publication number
EP0484575A1
EP0484575A1 EP90121280A EP90121280A EP0484575A1 EP 0484575 A1 EP0484575 A1 EP 0484575A1 EP 90121280 A EP90121280 A EP 90121280A EP 90121280 A EP90121280 A EP 90121280A EP 0484575 A1 EP0484575 A1 EP 0484575A1
Authority
EP
European Patent Office
Prior art keywords
pressure
diaphragm pump
piston diaphragm
pump
pumps
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Withdrawn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
EP90121280A
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German (de)
English (en)
Inventor
André Haubry
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.)
Abel-Pumpen & Co KG GmbH
Original Assignee
Abel-Pumpen & Co KG GmbH
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 Abel-Pumpen & Co KG GmbH filed Critical Abel-Pumpen & Co KG GmbH
Priority to EP90121280A priority Critical patent/EP0484575A1/fr
Publication of EP0484575A1 publication Critical patent/EP0484575A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston

Definitions

  • the invention relates to a device for conveying sludge or the like flowable media, in particular to a filter device and for the metered admixing of a filter aid or the like according to the preamble of patent claim 1.
  • Sludges and slurries of all kinds are often conveyed via filter presses and freed of solid components there.
  • the filtration pressure and thus the volume flow in the feed pump change during loading.
  • a suitable regulation in the feed pump ensures to ensure that the output pressure of the pump assumes the desired values during operation and that the volume flow changes depending on the filtration pressure.
  • piston diaphragm pumps to convey sludges and turbidities (DE-GM 86 17 065). They are particularly suitable for feeding all types of filter presses. They ensure high volumetric efficiency, even at high pressures, and have low backflow losses. Wear is also very low in the valve area when pumping highly abrasive media.
  • the admixture of a filter aid is expediently carried out in a certain proportion of the mixture in order to obtain an optimal and cost-effective effect. Since the pressures and volume flows change constantly when loading filter presses, it is problematic to maintain the mixing ratio regardless of these values. In the past, relatively complicated regulations that were unsatisfactory in operation were proposed for this purpose.
  • the invention has for its object to provide a device for conveying sludge or the like flowable media, in particular for a filter device and metered admixing of a filter aid or the like in the conveyed sludge, which gently promote the filter aid and above all to maintain the mixing ratio of Filter aids and sludge enable regardless of the delivery volume and the outlet pressure.
  • At least one first piston diaphragm pump is used as the sludge pump, as it is known per se.
  • the piston diaphragm pump has a compensating and non-return valve which is connected to a storage container and via which working medium enters the container during the pressure stroke and is sucked out of the working medium again during the suction stroke.
  • the return flow of the working medium during the suction stroke takes place via a pressure control valve, the flow cross section of which is adjustable depending on the outlet pressure of the pump.
  • the pressure control valve is connected to the so-called pulsation damper, via which the delivery takes place. With increasing pressure, the cross section in the pressure control valve and thus the stroke of the diaphragm also decreases. As a result, the amount delivered is also reduced. In this way, an adjustment of the volume flow of the pump to the filtration pressure can be achieved.
  • At least one second piston diaphragm pump of much smaller dimensions is provided for conveying the filter aid.
  • the second piston diaphragm pump in the same way has a pressure control valve which, moreover, largely resembles the pressure control valve of the larger piston diaphragm pump.
  • the two piston diaphragm pumps are connected on the output side.
  • the smaller piston diaphragm pump which acts as a metering pump, adapts itself synchronously to the delivery rate of the sludge pump. If the delivery rate ratio between the sludge and metering pumps is 10: 1 or 20: 1, for example, this ratio is maintained regardless of the filtration pressure. It is understood that the delivery ratio can be changed, for example by changing the number of strokes of the smaller piston diaphragm pump.
  • the pressure-side dosing of the filter aid with the aid of a piston diaphragm pump enables high accuracy and gentle delivery of the filter aid while avoiding unnecessary turbulence.
  • Sludges often contain gas.
  • the size of the gas bubbles is determined by the suction pressure of the slurry pump.
  • the pressure changes depending on the resistances in the pipelines at high volume flow at the beginning and by low resistances at low volume flow at the end of the loading time of a filter press.
  • a fluctuating in the storage container Adjust media level.
  • the volume of the gas bubbles decreases considerably.
  • the volume flow on the suction and pressure sides of slurry pumps is no longer the same because the specific weight has changed. If the filter aid is only dosed depending on the volume flow, e.g. upstream of the sludge pump, an exact dosing is no longer possible.
  • the filter aid is only dosed depending on the volume flow, e.g. upstream of the sludge pump, an exact dosing is no longer possible.
  • both piston diaphragm pumps are arranged on the same level.
  • the suction pressures should also be identical, which may lead to a corresponding calculation of the suction pipe.
  • the metering point for the filter aid is to be as far as possible 10 m from the filter device in order to enable sufficient mixing between the filter aid and sludge.
  • the connection of the output line of the smaller pump to the output line of the larger pump should preferably be approximately at right angles, in order to also have a good one To get initial mixing.
  • the final filtration pressure of the smaller piston diaphragm pump should expediently be set somewhat higher than that of the sludge pump in order to ensure adequate conditioning of the sludge in the filtration phase.
  • piston diaphragm pumps in the device according to the invention act two or more times.
  • the piston diaphragm pumps can be designed as flat or ball diaphragm pumps.
  • a sludge pump 10 which is designed as a ball diaphragm pump, is connected to a sludge tank 12.
  • Another ball diaphragm pump 14 the delivery rate of which is significantly less than that of the pump 10, for example by 1/10, is connected to a container 16 for filter aids, for example a dissolved polymer.
  • the output lines of the pumps 10, 14 are at 18 with one another connected.
  • the nozzle of the outlet line of the pump 14 meets the outlet line of the pump 10 approximately at an angle of 90 °.
  • the common delivery line 20 leads to a filter press 22.
  • the distance between the connection point 18 and the filter press 22 is at least 10 m.
  • a valve 24 is drawn in dashed lines, which is used for better mixing.
  • Q1 denotes the flow rate of the sludge pump 10 and Q2 the flow rate of the metering pump 14. Since both pumps 10, 14 are connected together on the outlet side, the pressure increase at the pumps 10, 14 is completely the same as through curves P1 and P2 is shown.
  • the ratio of Q2 to Q1 represents the mixing ratio in the flow of line 20. It can be seen that this ratio remains constant when the pressure changes.
  • FIG. 3 two piston pumps 10a, 14a are shown in detail, which are designed according to the pumps 10, 14 for different sizes of delivery.
  • the double-acting diaphragm pump 10a with the diaphragm housings 24, 26 for large delivery volume is used, for example, for delivery of sludge that is sucked in via the suction line 28.
  • the piston diaphragm pump 14a with the diaphragm housing 30 is single-acting and has a suction line 32 which is connected, for example, to the container 16 according to FIG. 1.
  • a drive device 34 containing a crank mechanism drives a double-acting piston 36 within a cylinder 38, which is located in the pump chamber 40, which is connected to the membrane housings 24, 26 via lines 42.
  • the suction line 28 leads to both diaphragm housings 24, 26 and the output lines of both diaphragm housings 24, 26 are connected to a common pressure line 42, which in turn is connected to a pressure air tank 44, which serves to dampen the pulsation in a known manner.
  • the membrane housing 24 has a double spherical membrane 46, which bears against a curved perforated plate.
  • the membrane 46 faces a chamber 48 in which a rocker arm 50 is pivotally mounted, which is in mechanical connection with a compensating and check valve 52.
  • the valve 52 is located inside a reservoir or expansion tank 54.
  • the working space of the membrane housing 24 is connected to the suction line 28 and the pressure line 42 via ball valves 56, 58.
  • Two lines 60, 62 are inserted into the container 54, the line 60 being connected to an inlet of the valve 52, while the line 62 is free at one end in the container 54.
  • the lines 60, 62 are connected to a pressure regulating valve 64 which is connected to the pressure wind boiler 44 via a connection piece. Details of the compensation and check valve are shown in Fig. 4.
  • a spring-loaded valve plate 46 is raised so that part of the primary working medium can enter the housing of the valve and exit via a throttle bore 66 into the container 54.
  • the valve plate 64 is raised by the rocker arm 50 via the tappet 68.
  • the rocker arm is actuated by the membrane 46.
  • a membrane 72 exposed to the pressure in the pressure wind chamber 44 actuates a tappet 74 as a function of the pressure in the pressure wind chamber 44.
  • the tappet 74 is connected to a valve member 76 which interacts with a valve seat 78.
  • the gap between valve member 76 and seat 78 determines the flow cross-section between lines 60, 62 and thus the amount of primary working medium that is introduced into chamber 48 during the suction stroke. In this way, the volume flow of the diaphragm housing 24 is automatically adapted to the outlet pressure of the pump.
  • a check and equalization valve 52 'and a pressure control valve 64' are similar in structure to the valves 52, 64 of the pump 10a, in particular the pressure control valve 64 'is identical in structure and behavior to the pressure control valve 64.
  • the pressure control valve 64 ' is connected to the pressure line 80 of the diaphragm housing 30, which is connected to an output line 82 of the pressure air vessel 44.
  • a pressure wind boiler 44 ' is connected to the pressure line 80 for pulsation damping.
  • the quantity delivered by the pump 14a always has the same ratio to the quantity delivered by the pump 10a, regardless of the outlet pressure of the common pressure line 82, which e.g. depends on the filtration pressure.
  • FIG. 6 shows a ball check valve 84 in line 60, which allows air to enter line 60 when the vacuum is too great. This measure serves to prevent cavitation.
  • Fig. 7 shows a four-acting piston diaphragm pump, of which three diaphragm housings 90, 92, 94 serve to convey sludge, which is supplied via 96 and corresponding lines.
  • a fourth membrane housing 98 is used to convey a polymer which is introduced via line 100.
  • the output lines of the diaphragm housing 90, 92, 94 connected at 102 and the output line 104 of the diaphragm housing 98 are connected to a pulsation damper 106.
  • the output line 108 of the pulsation damper is connected, for example, to a filter press, as shown in FIG. 1.
  • Two double-acting pistons 112 and 114 are driven by a gear 110.
  • the Double-acting piston 112 has on its opposite sides the same-sized active areas which act on the power parts of the diaphragm housings 92, 94.
  • the stepped piston 114 has a larger effective area, which acts on the power part of the diaphragm housing 90. The last three effective areas mentioned are of equal size.
  • the smaller piston section of the piston 114 interacts with the membrane housing 98. The sum of the three larger effective areas in relation to the smaller effective area of the piston 114 determines the mixing ratio of sludge and polymer in the outlet line 108.
  • FIG. 8 shows a double-acting diaphragm pump with diaphragm housings 116, 118, the output lines of which are connected and connected to a pulsation damper 122 via a line 120.
  • a double-acting piston 126 is driven via a gear 124, the active surfaces of which act on the diaphragm housings 116, 118.
  • Much smaller diaphragm housings 128, 130 are assigned to the piston diaphragm pump mentioned and are also connected to the pulsation damper 122 via a common output line 132.
  • the double-acting piston 126 is connected via a piston rod 134 to a double-acting piston 136, the active surfaces of which are connected to the membrane housings 128, 130 cooperate.
  • the ratio of the effective areas of the pistons 126, 138 determines the mixing ratio in the output line 138 of the pulsation damper 122, regardless of how high the pressure in the line 138 is. However, this presupposes that the control behavior of the membrane housings 116, 118 on the one hand and of the membrane housings 128, 130 on the other hand is the same. Furthermore, the suction lines for the sludge pump on the one hand and the filter aid pump on the other hand are expediently dimensioned the same.
  • FIG. 9 shows a representation similar to FIG. 3, the same parts being provided with the same reference numerals to which an index b has been added. Therefore, only the most important parts and components are briefly explained below.
  • Two diaphragm pumps 10b, 14b are designed in accordance with the pumps 10, 14 according to FIG. 1 for different delivery capacities.
  • the double-acting ball diaphragm pump 10b with the diaphragm housings 24b and 26b for large delivery volume serves, for example, to convey sludge which is drawn in via the suction line 28b.
  • the piston diaphragm pump 14b with a diaphragm housing 30b is single-acting and has a suction line 32b which is connected, for example, to the container 16 according to FIG. 1.
  • a drive device 34 containing a crank drive drives a double-acting piston within a cylinder which is located in a pump chamber which is connected to the diaphragm housings 24b, 26b via lines 42b.
  • the suction line 28b leads to both diaphragm housings 24b, 26b, and the output lines of both diaphragm housings 24b, 26b are connected to a common pressure line 42b, which in turn is connected to a pressure air vessel 44b, which is known to dampen the pulsation.
  • the membrane housing 24b (and likewise the membrane housing 26b) has a cylindrical membrane 150 which is wrapped around a perforated cylinder 151.
  • the membrane 150 faces a chamber 48b, the outlet of which is connected to valves 56b and 58b at the inlet and outlet.
  • the pressure lines 42b are connected to a compensating and non-return valve arrangement 52b, which ensures that part of the liquid displaced by the double-acting piston of the drive device 34b is not conveyed to the working space 48b, but into a container 54b in which the valve arrangement 52b is located located.
  • a pressure control valve 64b In the reservoir and expansion tank 54b there is also a pressure control valve 64b, which allows the medium to return from the tank 54b regulates to the drive device 34b.
  • valves 52b and 64b Details of the valves 52b and 64b will not be discussed further since they are state of the art.
  • a part of the working medium is fed into the container 54b during a pressure stroke in the membrane housing 54b, the amount being dependent on an adjustable presetting of the valve arrangement 52b.
  • part of the working medium is removed from the storage container 54b, in accordance with the throttle position of the pressure control valve 64b, so that the stroke of the diaphragm 150 is determined by the setting of the valves 52b and 64b.
  • a check and compensating valve 52'b and a pressure control valve 64'b are similar in construction to the valves 52, 64 of the pump 10a according to FIG. 3, in particular the pressure control valve 64 'is identical in structure and behavior to the pressure control valve 64.
  • the pressure control valve 64'b is connected to the pressure line 80b, which is connected to the outlet line of the pressure wind boiler 44b. Since the pressure control valves 64b, 64'b show the same control behavior, that of the pump 14b The quantity delivered always has the same ratio to the quantity delivered by the pump 10b regardless of the outlet pressure of the common pressure line 82b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP90121280A 1990-11-07 1990-11-07 Dispositif pour pomper de la vase et pour ajouter un agent d'aide pour un filtrage dosé Withdrawn EP0484575A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90121280A EP0484575A1 (fr) 1990-11-07 1990-11-07 Dispositif pour pomper de la vase et pour ajouter un agent d'aide pour un filtrage dosé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90121280A EP0484575A1 (fr) 1990-11-07 1990-11-07 Dispositif pour pomper de la vase et pour ajouter un agent d'aide pour un filtrage dosé

Publications (1)

Publication Number Publication Date
EP0484575A1 true EP0484575A1 (fr) 1992-05-13

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Family Applications (1)

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EP90121280A Withdrawn EP0484575A1 (fr) 1990-11-07 1990-11-07 Dispositif pour pomper de la vase et pour ajouter un agent d'aide pour un filtrage dosé

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013045598A3 (fr) * 2011-09-30 2013-05-30 Aker Wirth Gmbh Pompe volumétrique et procédé d'exploitation de ladite pompe volumétrique
WO2014056724A1 (fr) * 2012-10-10 2014-04-17 Aker Wirth Gmbh Pompe à membrane à piston
US10578098B2 (en) 2005-07-13 2020-03-03 Baxter International Inc. Medical fluid delivery device actuated via motive fluid
US11478578B2 (en) 2012-06-08 2022-10-25 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
CN119041855A (zh) * 2024-11-04 2024-11-29 成都华誉博能油气装备工程技术有限公司 一种稳流输送的钻井液供应设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2302142A1 (de) * 1973-01-17 1974-07-18 Tuchenhagen Otto Verfahren fuer filterpressen zur proportionalen zudosierung von schlammaufbereitungs-chemikalien
DE2401643A1 (de) * 1974-01-15 1975-07-17 Tuchenhagen Otto Verfahren zur proportionalen zudosierung in schlammpumpen, die auf filterpressen arbeiten
DE3210821A1 (de) * 1982-03-24 1983-10-13 Grünbeck Wasseraufbereitung GmbH, 8884 Höchstädt Dosierpumpe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2302142A1 (de) * 1973-01-17 1974-07-18 Tuchenhagen Otto Verfahren fuer filterpressen zur proportionalen zudosierung von schlammaufbereitungs-chemikalien
DE2401643A1 (de) * 1974-01-15 1975-07-17 Tuchenhagen Otto Verfahren zur proportionalen zudosierung in schlammpumpen, die auf filterpressen arbeiten
DE3210821A1 (de) * 1982-03-24 1983-10-13 Grünbeck Wasseraufbereitung GmbH, 8884 Höchstädt Dosierpumpe

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10578098B2 (en) 2005-07-13 2020-03-03 Baxter International Inc. Medical fluid delivery device actuated via motive fluid
US10590924B2 (en) 2005-07-13 2020-03-17 Baxter International Inc. Medical fluid pumping system including pump and machine chassis mounting regime
US10670005B2 (en) 2005-07-13 2020-06-02 Baxter International Inc. Diaphragm pumps and pumping systems
US11384748B2 (en) 2005-07-13 2022-07-12 Baxter International Inc. Blood treatment system having pulsatile blood intake
US12392335B2 (en) 2005-07-13 2025-08-19 Baxter International Inc. Medical fluid pumping system having backflow prevention
WO2013045598A3 (fr) * 2011-09-30 2013-05-30 Aker Wirth Gmbh Pompe volumétrique et procédé d'exploitation de ladite pompe volumétrique
AU2012314408B2 (en) * 2011-09-30 2016-05-26 Mhwirth Gmbh Positive displacement pump and operating method thereof
US9695808B2 (en) 2011-09-30 2017-07-04 Mhwirth Gmbh Positive displacement pump and operating method thereof
US11478578B2 (en) 2012-06-08 2022-10-25 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
WO2014056724A1 (fr) * 2012-10-10 2014-04-17 Aker Wirth Gmbh Pompe à membrane à piston
CN119041855A (zh) * 2024-11-04 2024-11-29 成都华誉博能油气装备工程技术有限公司 一种稳流输送的钻井液供应设备

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