EP3390818A1 - Diaphragm pump comprising dust suction from below - Google Patents

Diaphragm pump comprising dust suction from below

Info

Publication number
EP3390818A1
EP3390818A1 EP16822973.0A EP16822973A EP3390818A1 EP 3390818 A1 EP3390818 A1 EP 3390818A1 EP 16822973 A EP16822973 A EP 16822973A EP 3390818 A1 EP3390818 A1 EP 3390818A1
Authority
EP
European Patent Office
Prior art keywords
dust
pressure
diaphragm pump
hydraulic
dust chamber
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.)
Granted
Application number
EP16822973.0A
Other languages
German (de)
French (fr)
Other versions
EP3390818B1 (en
Inventor
Frank Hannemann
Thomas Metz
Sebastian RAHM
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.)
Dipl Ing Ernst Schmitz & Co KG Maschinen U GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP3390818A1 publication Critical patent/EP3390818A1/en
Application granted granted Critical
Publication of EP3390818B1 publication Critical patent/EP3390818B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • 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
    • 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
    • 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 diaphragm pump for the pneumatic high-pressure delivery of 1 to 10 MPa fluidized dusts and a method for operating such a diaphragm pump.
  • screw conveyors are used in practice with leich ⁇ ter bulk material compression and subsequent gas injection for the pneumatic bulk material, s.
  • Pneumatic diaphragm pumps are used, whereby only clotting ⁇ ge pressures are possible DE 3909800 AI.
  • the invention is based on the problem, a pump head for the pneumatic high-pressure delivery of fluidized
  • a diaphragm pump for pneumatic high-pressure delivery of fluidized dusts with the features of claim 1 and a method for operating such a diaphragm pump having the features of claim 8.
  • the filling takes place by pneumatic suction, the bulk material being held in a loosened, flowable state over the entire pumping process and dust compaction being deliberately avoided. In this case, a highly compact and therefore economical construction is achieved.
  • the pneumatic suction has several decisive advantages over known dust pump systems:
  • the cross section of the suction line 17 and thus the size of the inlet valve 8 and the connection to the pump head is much smaller compared to a gravity-driven filling, whereby the pump head can be designed correspondingly smaller.
  • the filling can take place from below into the dust chamber.
  • This has the advantage that the construction of the pump head is simplified in the region of the diaphragm and in the hydraulic area, since no dust feed-through from above is required, which would otherwise be the case when filled by gravity.
  • it is possible by this arrangement to constructively realize a very large loosening surface 4, which is necessary for the avoidance of dust compaction and short cycle times.
  • the pressure booster shown in Figure 3 and thus the separation of the hydraulic system in a primary hydraulic 15 - between pressure booster and hydraulic unit - and a secondary hydraulic 16 - between diaphragm 3 and pressure booster 13 - offer the following advantages:
  • the pressure of the hydraulic unit can be selected independently of the process pressure, whereby cost-effective standard hydraulic units can be used instead of custom-made. Since the pressure of the hydraulic power pack (20-30 MPa) is generally much higher than the required process pressure in the dust system (1-10 MPa), the volume flows are in the hydraulic power unit and thus the cost of the hydraulic unit significantly lower than if the hydraulic unit to the process pressure of the dust system are designed.
  • the pressure transmission ratio (primary pressure / secondary pressure) is thus usually at about 2-30.
  • a further advantage of the entire method is that the high-pressure gas requirement is further reduced compared with the system described in DE102011007066A1, since on the one hand the dead volume still to be removed after discharge can be made even smaller due to the smaller pipe cross-sections and on the other hand the previously supplied during discharge Covering gas is used for pneumatic conveying.
  • the membrane is mechanically guided by one or more pistons but also guide rods 10, whereby unwanted deformations of the membrane can be avoided.
  • the piston or the guide rod 10 On the position of the piston or the guide rod 10 relative to the housing 9, a position measurement of the membrane 3 is given.
  • FIG. 2 shows the essential sequence steps of the pump cycle ⁇ and FIG. 3 shows the integration of a plurality of pump heads into a dust pump system.
  • Methods are suitable for fine-grained bulk materials or dusts, which can be loosened and fluidized by addition of gas, such as coal dust, and aims in particular at the supply of pressurized pulverized coal pulverizers with dry coal dust feed.
  • gas such as coal dust
  • the process pressures are on the order of 1 to 10 MPa. In principle, however, the method can also be used for all other processes where fluidizable dusts are to be pumped dry to high pressure.
  • FIG. 2 shows the pump cycle on the basis of four process steps A) to D).
  • step A) the hydraulic space liquid is withdrawn, whereby the membrane is pulled up and negative pressure is generated in the dust chamber.
  • dust from the hopper bunker 11 is sucked. It is assumed that the dust in the supply bunker is in a fluidized state due to the addition of gas.
  • a negative pressure in the dust chamber 1 is generated, whereby the promotion is supported.
  • step B) by closing the inlet fitting 8 and gas addition via the gas ports 5, the dust chamber is covered to the pressure by the pressure of the consumer 20 plus the pneumatic delivery pressure loss between the pump head 14 and consumer (circa 0.1 to 1 MPa) is given.
  • step C the outlet fitting 7 is opened for discharging and the dust is conveyed out via the gas connections 5 with the addition of gas.
  • the volume of the dust chamber is reduced by means of the diaphragm 3 by adding hydraulic fluid via the hydraulic connection 6 into the hydraulic space.
  • step D the structurally unavoidable residual volume of the dust chamber is relaxed and the pump cycle begins with step A from the front.
  • the pressure in the dust chamber 1 is approximately 0.01 to 0.08 MPa below the pressure in the storage tank 11 (delivery differential pressure).
  • the negative pressure in the dust chamber 1 is generated by applying negative pressure via the gas connection 5. This is during the pneumatic conveying of dust in the dust chamber on the evacuation of the dust chamber generated by a vacuum pump, the delivery differential pressure.
  • the negative pressure applied via the gas connection (5) equals the amount according to the delivery differential pressure or is the same as the delivery differential pressure.
  • a single pump head 14 operates batchwise (discontinuous), as shown in FIG. 3, a plurality of pump heads are interconnected to form a dust pump system, wherein a continuous dust flow can be achieved.
  • at least 2 pump heads are arranged.
  • any number of pump heads can be interconnected.
  • a plurality of n pump heads are arranged, they can be operated in phase-shifted relation to each other by 2n / n of the pump cycle ⁇ .
  • the hydraulic unit can be dimensioned smaller for a given throughput rate than would be the case with discontinuous operation. In this embodiment, the effects on the pressure regime of the consumer 20 are reduced.
  • An entrainment gasifier is supplied with coal dust at 100 t / h at 5 MPa gasification pressure.
  • the pressure loss between the dust pump and the carburettor is 1 MPa, which means that the delivery pressure is 6 MPa.
  • the cycle time of a pump head is 20 s, which results in a required volume of the dust chamber of 0.15 m 3 and the intake volume flow of 270 m 3 / h.
  • the hydraulic unit operates at an operating pressure of 30 MPa and with a volume flow of 54 m 3 / h. Since further gas is added during stringing and discharging, the pressure delivery volume flow corresponds to 300 m 3 / h.
  • the fittings namely the outlet valve 7 and the inlet valve 8, are given in a wear-resistant design.
  • the covering or relaxation of the dust space 1 with gas takes place over a large area, gas-permeable Auflock ceremoniessflä- surface 4, which is tight for the dust-like bulk material.
  • a large area, gas-permeable loosening surface 4 is integrated at the bottom of the dust chamber 1, through which pass the inlets and outlets of the dust to be conveyed.
  • the loosening surface in relation to the inner surface of the dust chamber is chosen as far as possible (at least 30% of the inner surface of the dust chamber), resulting in lower gas velocities in the bulk material and a compression of the bulk material is avoided.
  • the pressure in the dust chamber about 0.1 to 1 MPa above the pressure of the receiving container but also dosing 20th
  • the hydraulic system is divided into a primary and secondary hydraulics, wherein the primary hydraulic system is connected to the diaphragm 3 and is driven by the secondary hydraulic system via a pressure booster.
  • the pressure ratio (primary pressure / secondary pressure) may be about 2 to 30.
  • the primary and secondary hydraulics; can be operated with different hydraulic fluids.
  • the pressure booster can be designed as a pressure booster piston.
  • the pressure booster can be made recoverable by a return spring, wherein the return spring can be designed as a mechanical spring or as a pneumatic gas spring.
  • At least two pump heads are combined to form a system, the pressure conveying lines 18 are brought together 19, which allows an uninterrupted bulk material promotion.
  • a suction conveyor line 17 starts from the supply bunker 11 and branches off onto a plurality of pump heads.
  • receivers eg entrained flow gasifier, pulverized coal burner

Abstract

The invention relates to a diaphragm pump for pneumatic high-pressure delivery of 1 to 10 MPa of fluidised dusts, in which filling occurs from below via pneumatic suction by means of hydraulic reciprocating movement of the diaphragm (3) but also by applying a negative pressure. Advantageously, the dust is is held in a loosened fluidised state over the entire pump operation, wherein the high-pressure gas requirement is low. Particular embodiments relate to a drive of the diaphragm pump by means of a hydraulic pressure intensifier and multiple diaphragm pumps (14) which operated in a phase-displaced manner with respect to each other. A dust delivery system which uses the diaphragm pump according to the invention can be operated with a low drive power.

Description

Beschreibung description
Membranpumpe mit Staubansaugung von unten Die Erfindung betrifft eine Membranpumpe zur pneumatischen Hochdruckförderung von 1 bis 10 MPa fluidisierter Stäube und ein Verfahren zum Betrieb einer solchen Membranpumpe. The invention relates to a diaphragm pump for the pneumatic high-pressure delivery of 1 to 10 MPa fluidized dusts and a method for operating such a diaphragm pump.
Für Niederdruckanwendungen im Bereich von ca. 0,1 bis 0,2 bar Druckerhöhung werden in der Praxis Förderschnecken mit leich¬ ter Schüttgutkomprimierung und anschließender Gasinjektion zur pneumatischen Schüttgutförderung eingesetzt, s. For low pressure applications in the range of about 0.1 to 0.2 bar pressure increase screw conveyors are used in practice with leich ¬ ter bulk material compression and subsequent gas injection for the pneumatic bulk material, s.
DD000000081606A1, DE000003035745A1, DE000000656009A, DD000000081606A1, DE000003035745A1, DE000000656009A,
DE000000650988A, DE000000615779A, DE000000596565A, DE000000650988A, DE000000615779A, DE000000596565A,
DE000000568999A, DE000000551066A, DE000000485635A, DE000000568999A, DE000000551066A, DE000000485635A,
DE000000449676A, DE000000427455A. Für etwas höhere Drücke bis ca. 0,3 MPa werden statt Schnecken Zellenräder verwendet, s. DE102009016191B4, DE102009016191A1. Werden mehrere Staubpumpen in Reihe geschaltet können entsprechend höhere Drücke er- reicht werden, was jedoch für Hochdruckanwendungen mit einem sehr großen apparativen Aufwand verbunden ist, s.  DE000000449676A, DE000000427455A. For somewhat higher pressures up to approx. 0.3 MPa, instead of screws, cell wheels are used. DE102009016191B4, DE102009016191A1. If several dust pumps are connected in series, correspondingly higher pressures can be achieved, which, however, is associated with a very high outlay on equipment for high-pressure applications.
DE102008049542B4, DE102008049542A1 , DE102008007033A1, DE102008049542B4, DE102008049542A1, DE102008007033A1,
WO002010037601A1, WO002009095290A3, WO002009095290A2. Neben diesem Funktionsprinzip der Schneckenförderer und Zellenräder werden auch Staubpumpen nach dem Prinzip der WO0020010037601A1, WO002009095290A3, WO002009095290A2. In addition to this operating principle of the screw conveyors and cell wheels are also dust pumps according to the principle of
Druckluftmembranpumpen eingesetzt, wobei auch hier nur gerin¬ ge Drücke möglich sind DE 3909800 AI. Pneumatic diaphragm pumps are used, whereby only clotting ¬ ge pressures are possible DE 3909800 AI.
Während für niedrige Drücke Staubpumpen industriell einge¬ setzt werden, sind für Hochdruckprozesse in der Größenordnung von 1 bis 10 MPa heute nur Schleusenprozesse industriell etabliert, s. DE 10 2005 047 583 B4, DD 147 188 A3, While industry is for low pressures dust pump ¬ sets, only lock processes for high-pressure processes in the order of 1 to 10 MPa today industrially established, s. DE 10 2005 047 583 B4, DD 147 188 A3,
DE102008052673A1. Um die Investitions- und Betriebskosten solcher Schleusensysteme zu reduzieren, werden auch Staubpum¬ pen für Hochdruckanwendungen entwickelt, wobei folgende Ver- fahren bekannt sind: DE102008052673A1. To reduce the capital and operating costs of such lock systems, also Staubpum ¬ pumps for high-pressure applications are being developed, with the following procedural are known:
Für Hochdruckanwendungen in der Größenordnung von 1 bis 10 MPa sind Staubpumpen basierend auf dem Prinzip der Strang¬ presse bekannt. Hierbei wird das Schüttgut mechanisch wie in einer Strangpresse in einem sich verjüngenden Kanal zu einem Brikett verdichtet und dadurch eine hohe Druckbarriere aus Kanal und Brikett gebildet, was zur Abdichtung zwischen Hoch- und Niederdruckteil erforderlich ist, siehe US000008851406B2 , US020100021247A1 Nachteilig hierbei ist der hohe Verschleiß aufgrund der hohen auftretenden Reibungskräfte als auch die Problematik, dass die mechanischen Schüttguteigenschaften durch diesen Vorgang stark verändert werden, da das Schüttgut nach der Pumpe in brikettähnlichen Schüttgut-agglomerationen vorliegt. Insbesondere für Verbraucher wie die Staubverbrennung oder Staubvergasung ist dann unter Druck eine erneute Aufmahlung erforderlich, was ein bisher ungelöstes Problem darstellt . For high-pressure applications in the order of 1 to 10 MPa dust pumps are known based on the principle of extrusion ¬ press. Here, the bulk material is mechanically as in an extruder in a tapered channel compressed into a briquette and thereby formed a high pressure barrier of channel and briquette, which is required for sealing between high and low pressure part, see US000008851406B2, US202021247A1 The disadvantage here is the high wear due to the high friction forces occurring as well the problem that the mechanical bulk material properties are greatly changed by this process, since the bulk material is present after the pump in briquet-like bulk material agglomerations. In particular, for consumers such as dust combustion or dust gasification then a new Aufmahlung is required under pressure, which represents a previously unsolved problem.
Neben dem Prinzip der Strangpresse ist für Hochdruckanwendun- gen auch das Kolbenpumpenprinzip bekannt. Hierzu bekannte Ausführungen sind in DE000001008201A, DE000001175653A,  In addition to the extrusion press principle, the piston pump principle is also known for high pressure applications. Known embodiments are in DE000001008201A, DE000001175653A,
DE000002722931A1, DE102008009679A1 beschrieben. Wesentlicher Nachteil hierbei ist der hohe, bisher ungelöste Verschleiß an den trocken laufenden Kolbenringen. Dieses Problem kann durch die Verwendung von Membranen wie in DE102011007066A1 dargestellt gelöst werden. DE000002722931A1, DE102008009679A1 described. The main disadvantage here is the high, previously unresolved wear on the dry-running piston rings. This problem can be solved by the use of membranes as shown in DE102011007066A1.
Hierbei sind jedoch aufgrund des schwerkraftgetriebenen Befüllens - wie auch bei allen anderen bekannten Staubpumpen und Schleusensystemen - relativ große Querschnitte und Abmes- sungen erforderlich.  However, due to the gravity-driven filling - as with all other known dust pumps and lock systems - relatively large cross-sections and dimensions are required.
Der Erfindung liegt das Problem zugrunde, einen Pumpenkopf zur pneumatischen Hochdruckförderung von fluidisiertem The invention is based on the problem, a pump head for the pneumatic high-pressure delivery of fluidized
Schüttgut und ein Verfahren zum Betrieb des Pumpenkopfes an- zugeben, bei denen das Schüttgut über den gesamten Pumpvorgang hinweg in einem aufgelockerten, fluidisierten Zustand gehalten wird. Bulk material and a method for operating the pump head, in which the bulk material is kept in a loosened, fluidized state throughout the pumping process.
Das Problem wird durch eine Membranpumpe zur pneumatischen Hochdruckförderung von fluidisierten Stäuben mit den Merkmalen des Patentanspruchs 1 und ein Verfahren zum Betrieb einer solchen Membranpumpe mit den Merkmalen des Patentanspruchs 8 gelöst . Bei der erfindungsgemäßen Staubpumpe erfolgt die Befüllung durch pneumatisches Ansaugen, wobei das Schüttgut über den gesamten Pumpvorgang hinweg in einem aufgelockerten, fließfä- higen Zustand gehalten wird und Staubverdichtungen gezielt vermieden werden. Dabei wird eine in hohem Maße kompakte und damit wirtschaftliche Bauweise erzielt. The problem is solved by a diaphragm pump for pneumatic high-pressure delivery of fluidized dusts with the features of claim 1 and a method for operating such a diaphragm pump having the features of claim 8. In the case of the dust pump according to the invention, the filling takes place by pneumatic suction, the bulk material being held in a loosened, flowable state over the entire pumping process and dust compaction being deliberately avoided. In this case, a highly compact and therefore economical construction is achieved.
Das pneumatische Ansaugen hat mehrere entscheidende Vorteile gegenüber bekannten Staubpumpensystemen: Der Querschnitt der Saugleitung 17 und damit die Größe des Einlassventils 8 und der Anschluss am Pumpenkopf fällt im Vergleich zu einer schwerkraftgetriebenen Befüllung wesentlich kleiner aus, wodurch der Pumpenkopf entsprechend kleiner ausgelegt werden kann. Des Weiteren kann die Befüllung von unten in den Staubraum hinein erfolgen. Das hat den Vorteil, dass die Konstruktion des Pumpenkopfes im Bereich der Membran und im Hydraulikbereich vereinfacht ist, da keine Staubdurchführung von oben benötigt wird, was sonst bei Befüllung durch Schwerkraft der Fall wäre. Des Weiteren ist es möglich, die Staubpumpe neben, anstatt unterhalb des Vorlagebunkers 11 zu platzieren, was wiederum Bauhöhe einspart und die Wirtschaftlichkeit solcher Anlagen erhöht. Schließlich ist es durch diese Anordnung möglich, eine sehr große Auflockerungsfläche 4 konstruktiv zu realisieren, was für die Vermeidung von Staubverdichtungen und kurze Zykluszeiten erforderlich ist. The pneumatic suction has several decisive advantages over known dust pump systems: The cross section of the suction line 17 and thus the size of the inlet valve 8 and the connection to the pump head is much smaller compared to a gravity-driven filling, whereby the pump head can be designed correspondingly smaller. Furthermore, the filling can take place from below into the dust chamber. This has the advantage that the construction of the pump head is simplified in the region of the diaphragm and in the hydraulic area, since no dust feed-through from above is required, which would otherwise be the case when filled by gravity. Furthermore, it is possible to place the dust pump next to, instead of below the bunker 11, which in turn saves height and increases the efficiency of such systems. Finally, it is possible by this arrangement to constructively realize a very large loosening surface 4, which is necessary for the avoidance of dust compaction and short cycle times.
Der in Fig 3 dargestellte Druckübersetzer und damit auch die Trennung des Hydrauliksystems in eine Primärhydraulik 15 - zwischen Druckübersetzer und Hydraulikaggregat - und eine Sekundärhydraulik 16 - zwischen Membran 3 und Druckübersetzer 13 - bieten folgende Vorteile: Der Druck des Hydraulikaggregates kann unabhängig vom Prozessdruck gewählt werden, wodurch kostengünstige Standard-Hydraulikaggregate anstelle von Spezialanfertigungen verwendet werden können. Da in der Regel der Druck des Hydraulikaggregates (20-30 MPa) wesentlich höher als der geforderte Prozessdruck im Staubsystem (1-10 MPa) liegt, sind die Volumenströme im Hydraulikaggregat und damit die Kosten des Hydraulikaggregates deutlich geringer, als würde das Hydraulikaggregat auf den Prozessdruck des Staubsystems ausgelegt werden. Das Druckübersetzungsverhältnis (Primärdruck/Sekundärdruck) liegt damit in der Regel bei cir- ca 2-30. Durch die Verringerung der Volumenströme in derThe pressure booster shown in Figure 3 and thus the separation of the hydraulic system in a primary hydraulic 15 - between pressure booster and hydraulic unit - and a secondary hydraulic 16 - between diaphragm 3 and pressure booster 13 - offer the following advantages: The pressure of the hydraulic unit can be selected independently of the process pressure, whereby cost-effective standard hydraulic units can be used instead of custom-made. Since the pressure of the hydraulic power pack (20-30 MPa) is generally much higher than the required process pressure in the dust system (1-10 MPa), the volume flows are in the hydraulic power unit and thus the cost of the hydraulic unit significantly lower than if the hydraulic unit to the process pressure of the dust system are designed. The pressure transmission ratio (primary pressure / secondary pressure) is thus usually at about 2-30. By reducing the volume flows in the
Primärhydraulik und die dort ablaufenden Schaltvorgänge können Druckschläge reduziert oder ganz vermieden werden. Im Falle eines Membranbruches bleibt das Hydraulikaggregat unbeschadet, da Staub dann nur in die Primärhydraulik eindringen kann, nicht aber in die Sekundärhydraulik. Für Primär- und Sekundärhydraulik können unterschiedliche Hydraulikflüssigkeiten verwendet werden, was eine bessere Anpassung an die jeweiligen Prozessbedingungen ermöglicht. Durch die Trennung in Primär- und Sekundärhydraulik wird es möglich, mit einem Hydraulikaggregat mehrere Pumpenköpfe zu betreiben und auch bei Ausfall eines oder mehrerer Pumpenköpfe, die jeweils anderen Pumpenköpfe weiter zu betreiben. Primary hydraulics and the switching operations that take place there can be reduced or completely avoided. In the case of a diaphragm rupture, the hydraulic unit remains undamaged, since dust can only penetrate into the primary hydraulics, but not into the secondary hydraulics. For primary and secondary hydraulics, different hydraulic fluids can be used, allowing better adaptation to the respective process conditions. The separation into primary and secondary hydraulics makes it possible to operate several pump heads with one hydraulic unit and to continue to operate the other pump heads even if one or more pump heads fail.
Ein weiterer Vorteil des gesamten Verfahrens ist, dass der Hochdruck-Gasbedarf gegenüber dem in DE102011007066A1 beschriebenen System nochmals weiter reduziert ist, da einerseits das nach dem Ausfördern noch zu entspannende Totvolumen aufgrund der kleineren Rohrleitungsquerschnitte noch geringer gestaltet werden kann und andererseits beim Ausfördern das vorher zugeführte Bespannungsgas für die pneumatische Förderung mit genutzt wird. A further advantage of the entire method is that the high-pressure gas requirement is further reduced compared with the system described in DE102011007066A1, since on the one hand the dead volume still to be removed after discharge can be made even smaller due to the smaller pipe cross-sections and on the other hand the previously supplied during discharge Covering gas is used for pneumatic conveying.
In weiterer Ausgestaltung arbeiten mehrere Pumpenköpfe phasenverschoben zueinander. Durch diese Maßnahme wird der För- derprozess vergleichmäßigt. In a further embodiment, several pump heads work in phase with each other. This measure makes the conveying process even.
In einer besonderen Ausgestaltung wird die Membran durch einen oder mehrere Kolben aber auch Führungsstangen 10 mechanisch geführt, wodurch unerwünschte Verformungen der Membran vermieden werden. Über die Lage des Kolbens beziehungsweise der Führungsstange 10 relativ zum Gehäuse 9 ist eine Positionsmessung der Membran 3 gegeben. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben. In a particular embodiment, the membrane is mechanically guided by one or more pistons but also guide rods 10, whereby unwanted deformations of the membrane can be avoided. On the position of the piston or the guide rod 10 relative to the housing 9, a position measurement of the membrane 3 is given. Advantageous developments of the invention are specified in the subclaims.
Die Erfindung wird im Folgenden als Ausführungsbeispiel in einem zum Verständnis erforderlichen Umfang anhand von Figuren näher erläutert. Dabei zeigen: The invention is explained in more detail below as an exemplary embodiment in a scope necessary for understanding with reference to figures. Showing:
Fig 1 einen erfindungsgemäßen Pumpenkopf 1 shows a pump head according to the invention
Fig 2 die wesentlichen Ablaufschritte des Pumpenzyklus Λ und Fig 3 die Einbindung mehrerer Pumpenköpfe in ein Staubpumpen- System. 2 shows the essential sequence steps of the pump cycle Λ and FIG. 3 shows the integration of a plurality of pump heads into a dust pump system.
In den Figuren bezeichnen gleiche Bezeichnungen gleiche Elemente . Die erfindungsgemäße Staubpumpe und das damit ausgeführteIn the figures, like names denote like elements. The dust pump according to the invention and the thus executed
Verfahren sind für feinkörnige Schüttgüter oder Stäube geeignet, welche sich durch Gaszugabe auflockern und fluidisieren lassen, wie etwa Kohlestaub, und zielt insbesondere auf die Versorgung von druckaufgeladenen Kohlestaubvergasern mit tro- ckener Kohlestaubeinspeisung ab. Die Prozessdrücke liegen hierbei in der Größenordnung von 1 bis 10 MPa . Grundsätzlich kann das Verfahren aber auch für alle anderen Prozesse eingesetzt werden, wo fluidisierbare Stäube trocken auf hohen Druck gepumpt werden sollen. Methods are suitable for fine-grained bulk materials or dusts, which can be loosened and fluidized by addition of gas, such as coal dust, and aims in particular at the supply of pressurized pulverized coal pulverizers with dry coal dust feed. The process pressures are on the order of 1 to 10 MPa. In principle, however, the method can also be used for all other processes where fluidizable dusts are to be pumped dry to high pressure.
Bei dem Pumpenkopf nach Fig 1 befindet sich in einem drucktragenden Gehäuse 9 eine elastische, bewegliche Membran 3, die den Staubraum 1 vom Hydraulikraum 2 hermetisch dicht trennt. Die Membran wird zentrisch über eine Führungsstange 10 geführt und durch Zugabe oder Entnahme von Hydraulikflüssigkeit über die Anschlussleitung 6 nach unten beziehungsweise nach oben bewegt. Staub wird über das Einlassventil 8 in den Staubraum gesaugt und über das Auslassventil 7 aus dem Staubraum herausgefördert. Zur Auflockerung, Be- und Entspan- nung wird über die Anschlussleitungen 5 und die gasdurchlässigen Auflockerungsflächen 4 Gas zugegeben beziehungsweise abgeführt . In Fig 2 ist der Pumpenzyklus anhand von vier Ablaufschritten A) bis D) dargestellt. In the pump head of Figure 1 is located in a pressure-bearing housing 9, an elastic, movable membrane 3, which separates the dust chamber 1 from the hydraulic chamber 2 hermetically sealed. The membrane is guided centrally via a guide rod 10 and moved by adding or removing hydraulic fluid via the connecting line 6 downwards or upwards. Dust is sucked via the inlet valve 8 into the dust chamber and conveyed out via the outlet valve 7 from the dust chamber. For loosening, loading and relaxing gas 4 is added or removed via the connecting lines 5 and the gas-permeable loosening surfaces. FIG. 2 shows the pump cycle on the basis of four process steps A) to D).
In Schritt A) wird dem Hydraulikraum Flüssigkeit entzogen, wodurch die Membran nach oben gezogen wird und im Staubraum Unterdruck erzeugt wird. Dadurch wird Staub aus dem Vorlagebunker 11 angesaugt. Vorausgesetzt sei, dass der Staub im Vorlagebunker sich durch Gaszugabe in einem fluidisierten Zustand befindet. Während des pneumatischen Einförderns in den Staubraum 1 durch Auslenken der Membran 3 wird ein Unterdruck im Staubraum 1 erzeugt, wodurch die Förderung unterstützt wird . In step A) the hydraulic space liquid is withdrawn, whereby the membrane is pulled up and negative pressure is generated in the dust chamber. As a result, dust from the hopper bunker 11 is sucked. It is assumed that the dust in the supply bunker is in a fluidized state due to the addition of gas. During the pneumatic conveying in the dust chamber 1 by deflecting the membrane 3, a negative pressure in the dust chamber 1 is generated, whereby the promotion is supported.
Wenn die Membran die obere Endlage erreicht hat, wird in Schritt B) durch Schließen der Einlassarmatur 8 und Gaszugabe über die Gasanschlüsse 5 der Staubraum auf den Druck bespannt, welcher durch den Druck des Verbrauchers 20 zuzüglich des pneumatischen Förderdruckverlustes zwischen Pumpenkopf 14 und Verbraucher (circa 0,1 bis 1 MPa) gegeben ist. When the membrane has reached the upper end position, in step B) by closing the inlet fitting 8 and gas addition via the gas ports 5, the dust chamber is covered to the pressure by the pressure of the consumer 20 plus the pneumatic delivery pressure loss between the pump head 14 and consumer (circa 0.1 to 1 MPa) is given.
In Schritt C) wird zum Ausfördern die Auslassarmatur 7 geöffnet und der Staub unter Gaszugabe über die Gasanschlüsse 5 herausgefördert. Gleichzeitig wird das Volumen des Staubraumes durch Zugabe von Hydraulikflüssigkeit über den Hydraulik- anschluss 6 in den Hydraulikraum, mittels der Membran 3 reduziert . In step C), the outlet fitting 7 is opened for discharging and the dust is conveyed out via the gas connections 5 with the addition of gas. At the same time, the volume of the dust chamber is reduced by means of the diaphragm 3 by adding hydraulic fluid via the hydraulic connection 6 into the hydraulic space.
In Schritt D) wird das konstruktiv unvermeidliche Restvolumen des Staubraumes entspannt und der Pumpenzyklus beginnt mit Schritt A von vorne. In step D), the structurally unavoidable residual volume of the dust chamber is relaxed and the pump cycle begins with step A from the front.
Beim Ansaugen des Schüttgutes liegt der Druck im Staubraum 1 circa 0,01 bis 0,08 MPa unterhalb dem Druck im Vorlagebehälter 11 (Förderdifferenzdruck) . In einer besonderen Ausgestal- tung der Erfindung wird der Unterdruck in dem Staubraum 1 erzeugt, indem Unterdruck über den Gasanschluss 5 angelegt wird. Hierbei wird während des pneumatischen Einförderns von Staub in den Staubraum über das Evakuieren des Staubraumes mittels einer Vakuumpumpe der Förderdifferenzdruck erzeugt. Der über den Gasanschluss (5) angelegte Unterdruck gleicht dem Betrag nach dem Förderdifferenzdruck oder ist ebenso groß wie der Förderdifferenzdruck. When sucking the bulk material, the pressure in the dust chamber 1 is approximately 0.01 to 0.08 MPa below the pressure in the storage tank 11 (delivery differential pressure). In a particular embodiment of the invention, the negative pressure in the dust chamber 1 is generated by applying negative pressure via the gas connection 5. This is during the pneumatic conveying of dust in the dust chamber on the evacuation of the dust chamber generated by a vacuum pump, the delivery differential pressure. The negative pressure applied via the gas connection (5) equals the amount according to the delivery differential pressure or is the same as the delivery differential pressure.
Da ein einzelner Pumpenkopf 14 chargenweise (diskontinuierlich) arbeitet, werden, wie in FIG 3 dargestellt, mehrere Pumpenköpfe zu einem Staubpumpensystem zusammengeschaltet, wobei ein kontinuierlicher Staubförderstrom erzielt werden kann. Hierfür sind mindestens 2 Pumpenköpfe angeordnet. Je nach geforderter Durchsatzleistung und Verfügbarkeitsanforderungen können beliebig viele Pumpenköpfe zusammengeschaltet werden. Sind eine Mehrzahl von n Pumpenköpfen angeordnet, können diese um 2n/n des Pumpenzyklus Λ gegeneinander phasen- verschoben betrieben werden. Neben dem Vorteil der kontinuierlichen Staubförderung kann hierbei das Hydraulikaggregat bei gegebener Durchsatzleistung kleiner dimensioniert werden, als es bei diskontinuierlichem Betrieb der Fall wäre. Bei dieser Ausgestaltung werden auch die Auswirkungen auf das Druckregime des Verbrauchers 20 reduziert. Since a single pump head 14 operates batchwise (discontinuous), as shown in FIG. 3, a plurality of pump heads are interconnected to form a dust pump system, wherein a continuous dust flow can be achieved. For this purpose, at least 2 pump heads are arranged. Depending on the required throughput and availability requirements, any number of pump heads can be interconnected. If a plurality of n pump heads are arranged, they can be operated in phase-shifted relation to each other by 2n / n of the pump cycle Λ . In addition to the advantage of continuous dust extraction, in this case the hydraulic unit can be dimensioned smaller for a given throughput rate than would be the case with discontinuous operation. In this embodiment, the effects on the pressure regime of the consumer 20 are reduced.
Ein Flugstromvergaser wird mit 100 t/h bei 5 MPa Vergasungsdruck mit Kohlestaub versorgt. Der Druckverlust zwischen Staubpumpe und Vergaser beträgt 1 MPa, womit der Förderdruck bei 6 MPa liegt. Das Staubpumpensystem ist mit n=10 Stück Pumpenköpfen ausgestattet. Ein Pumpenkopf leistet somit 10 t/h. Die Zykluszeit eines Pumpenkopfes beträgt 20 s, wodurch sich ein erforderliches Volumen des Staubraumes zu 0,15 m3 und der Ansaug-Volumenstrom zu 270 m3/h ergibt. Das Hydrau- likaggregat arbeitet bei einem Betriebsdruck von 30 MPa und mit einem Volumenstrom von 54 m3/h. Da beim Bespannen und Ausfördern weiter Gas zugegeben wird, entspricht der Druckfördervolumenstrom 300 m3/h. Es ergibt sich ein Hochdruck- Gasbedarf von circa 16.000 Nm3/h. Dies entspricht einer elektrischen Antriebsleistung des Gasverdichters von circa 2,36 MW. Für ein konventionelles Schleusensystem wären etwa das 2,3-fache, nämlich 36.800 Nm3/h und 5,43 MW an An entrainment gasifier is supplied with coal dust at 100 t / h at 5 MPa gasification pressure. The pressure loss between the dust pump and the carburettor is 1 MPa, which means that the delivery pressure is 6 MPa. The dust pump system is equipped with n = 10 pump heads. A pump head thus provides 10 t / h. The cycle time of a pump head is 20 s, which results in a required volume of the dust chamber of 0.15 m 3 and the intake volume flow of 270 m 3 / h. The hydraulic unit operates at an operating pressure of 30 MPa and with a volume flow of 54 m 3 / h. Since further gas is added during stringing and discharging, the pressure delivery volume flow corresponds to 300 m 3 / h. The result is a high pressure gas demand of about 16,000 Nm 3 / h. This corresponds to an electrical drive power of the gas compressor of about 2.36 MW. For a conventional lock system would be about 2.3 times, namely 36,800 Nm 3 / h and 5.43 MW
Verdichterleistung erforderlich. Mit einem Wirkungsgrad des Hydraulikaggregates von 80% ergibt sich die elektrische Leistungsaufnahme der Staubpumpe zu 0,5 MW. In diesem Beispiel wird mit dem hier vorgestellten Staubpumpenprozess gegenüber einem konventionellen Schleusensystem 2,57 MW an Elektroener- gie oder 20.800 Nm3/h Hochdruck-Fördergas eingespart. Compressor capacity required. With an efficiency of Hydraulic power units of 80% results in the electrical power consumption of the dust pump to 0.5 MW. In this example, the dust pump process presented here saves 2.57 MW of electric energy or 20,800 Nm 3 / h of high-pressure delivery gas compared to a conventional lock system.
In einer besonderen Ausgestaltung der Erfindung sind die Armaturen, nämlich das Auslassventil 7 und das Einlassventil 8, in verschleißfester Ausführung gegeben. In a particular embodiment of the invention, the fittings, namely the outlet valve 7 and the inlet valve 8, are given in a wear-resistant design.
In einer besonderen Ausgestaltung der Erfindung erfolgt die Bespannung beziehungsweise Entspannung des Staubraumes 1 mit Gas über eine großflächige, gasdurchlässige Auflockerungsflä- che 4, die für das staubförmige Schüttgut dicht ist. In a particular embodiment of the invention, the covering or relaxation of the dust space 1 with gas takes place over a large area, gas-permeable Auflockerungsflä- surface 4, which is tight for the dust-like bulk material.
In einer besonderen Ausgestaltung der Erfindung ist am Boden des Staubraumes 1 eine großflächige, gasdurchlässige Auflockerungsfläche 4 integriertet, durch welche die Ein- und Ausläufe des zu fördernden Staubes hindurchtreten. In a particular embodiment of the invention, a large area, gas-permeable loosening surface 4 is integrated at the bottom of the dust chamber 1, through which pass the inlets and outlets of the dust to be conveyed.
In einer besonderen Ausgestaltung der Erfindung ist die Auflockerungsfläche im Verhältnis zur Innenfläche des Staubraumes nach Möglichkeit groß gewählt (mindestens 30% der Innenfläche des Staubraumes) , wodurch sich geringere Gasgeschwindigkeiten im Schüttgut ergeben und eine Komprimierung des Schüttgutes vermieden wird. In a particular embodiment of the invention, the loosening surface in relation to the inner surface of the dust chamber is chosen as far as possible (at least 30% of the inner surface of the dust chamber), resulting in lower gas velocities in the bulk material and a compression of the bulk material is avoided.
In einer besonderen Ausgestaltung der Erfindung liegt beim Ausfördern des Schüttgutes der Druck im Staubraum circa 0,1 bis 1 MPa über dem Druck des Empfangsbehälters aber auch Dosiergefäß 20. In a particular embodiment of the invention is the discharge in the bulk material, the pressure in the dust chamber about 0.1 to 1 MPa above the pressure of the receiving container but also dosing 20th
In einer besonderen Ausgestaltung der Erfindung ist das Hydrauliksystem in eine Primär- und Sekundärhydraulik unter- teilt, wobei die Primärhydraulik mit der Membran 3 verbunden ist und von der Sekundärhydraulik über einen Druckübersetzer angetrieben wird. Das Druckübersetzungsverhältnis (Primärdruck/Sekundärdruck) mag circa 2 bis 30 betragen. Die Primär- und Sekundärhydraulik; können mit unterschiedlichen Hydraulikflüssigkeiten betrieben werden. Der Druckübersetzer kann als Druckübersetzerkolben ausgeführt sein. Der Druckübersetzer kann durch eine Rückstellfeder zurückstellbar ausgeführt sein, wobei die Rückstellfeder als mechanische Feder oder als pneumatische Gasdruckfeder ausgeführt sein kann. In a particular embodiment of the invention, the hydraulic system is divided into a primary and secondary hydraulics, wherein the primary hydraulic system is connected to the diaphragm 3 and is driven by the secondary hydraulic system via a pressure booster. The pressure ratio (primary pressure / secondary pressure) may be about 2 to 30. The primary and secondary hydraulics; can be operated with different hydraulic fluids. The pressure booster can be designed as a pressure booster piston. The pressure booster can be made recoverable by a return spring, wherein the return spring can be designed as a mechanical spring or as a pneumatic gas spring.
In einer besonderen Ausgestaltung der Erfindung sind mindestens zwei Pumpenköpfe zu einem System kombiniert, deren Druckförderleitungen 18 zusammengeführt 19 sind, was eine unterbrechungsfreie Schüttgutförderung ermöglicht. In a particular embodiment of the invention, at least two pump heads are combined to form a system, the pressure conveying lines 18 are brought together 19, which allows an uninterrupted bulk material promotion.
In einer besonderen Ausgestaltung der Erfindung geht aus dem Vorlagebunker 11 eine Saugförderleitung 17 ab, die sich auf mehrere Pumpenköpfe verzweigt. In a particular embodiment of the invention, a suction conveyor line 17 starts from the supply bunker 11 and branches off onto a plurality of pump heads.
Die vorliegende Erfindung wurde zu Illustrationszwecken anhand von konkreten Ausführungsbeispielen im Detail erläutert. Dabei können Elemente der einzelnen Ausführungsbeispiele auch miteinander kombiniert werden. Die Erfindung soll daher nicht auf einzelne Ausführungsbeispiele beschränkt sein, sondern lediglich eine Beschränkung durch die angehängten Ansprüche erfahren . The present invention has been explained in detail for illustrative purposes with reference to specific embodiments. In this case, elements of the individual embodiments can also be combined with each other. The invention is therefore not intended to be limited to individual embodiments, but merely to be limited by the appended claims.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Staubraum 1 dust room
2 Hydraulikraum  2 hydraulic room
3 Membran  3 membrane
4 Gasdurchlässige Auflockerungsfläche, staubdichter Filter  4 Gas permeable loosening surface, dustproof filter
5 Gasanschluss  5 gas connection
6 Hydraulikanschluss  6 hydraulic connection
7 Auslassventil  7 exhaust valve
8 Einlassventil  8 inlet valve
9 Drucktragendes Gehäuse  9 Pressure-bearing housing
10 Membran-Führungsstange  10 membrane guide rod
11 Vorlagebunker  11 original bunker
12 Hydraulikaggregat  12 hydraulic unit
13 Druckübersetzer  13 pressure intensifier
14 Pumpenkopf  14 pump head
15 Primärhydraulik  15 primary hydraulics
16 Sekundärhydraulik  16 secondary hydraulics
17 Pneumatische Saugleitung  17 Pneumatic suction line
18 Pneumatische Druckleitung  18 Pneumatic pressure line
19 Zusammenführung  19 merge
20 Verbraucher, Empfänger (z. B. Flugstromvergaser, Kohlenstaubbrenner)  20 consumers, receivers (eg entrained flow gasifier, pulverized coal burner)
21 Schüttgut  21 bulk goods
22 Gas  22 gas

Claims

Patentansprüche claims
1. Membranpumpe zur pneumatischen Hochdruckförderung von 1 bis 10 MPa fluidisierter Stäube bei der 1. Diaphragm pump for pneumatic high-pressure delivery of 1 to 10 MPa fluidized dusts in the
— ein druckfestes Gehäuse (9) gegeben ist,  - a pressure-resistant housing (9) is given,
— das Volumen in dem Gehäuse durch eine waagrecht (horizontal) angeordnete Membran (3) in einen unteren Staubraum (1) und einen oberen Hydraulikraum (2) getrennt ist,  - The volume in the housing by a horizontally (horizontally) arranged membrane (3) in a lower dust chamber (1) and an upper hydraulic chamber (2) is separated,
— der Staubraum von unten einen durch eine Einlassarmatur - The dust chamber from below through an inlet fitting
(8) absperrbaren Zugang für den Staub aufweist, (8) has closable access for the dust,
— der Staubraum von unten einen durch eine Auslassarmatur (7) absperrbaren Abgang für den Staub aufweist,  - The dust chamber from below by a outlet fitting (7) lockable outlet for the dust,
— am Boden des Staubraums eine gasdurchlässige Auflocke- rungsfläche (4) angeordnet ist, die mit einem Gasan- schluss (5) verbunden ist,  A gas-permeable flocculation surface (4), which is connected to a gas connection (5), is arranged at the bottom of the dust chamber,
— der Hydraulikraum mit einem Hydraulikanschluss (6) für die Zuführung beziehungsweise Abführung von Hydraulikflüssigkeit verbunden ist.  - The hydraulic space is connected to a hydraulic connection (6) for the supply or discharge of hydraulic fluid.
2. Membranpumpe nach Anspruch 1 2. Diaphragm pump according to claim 1
dadurch gekennzeichnet, dass characterized in that
die Membran (3) über eine Führungsstange (10) zentrisch geführt ist. the membrane (3) via a guide rod (10) is guided centrally.
3. Membranpumpe nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass 3. Diaphragm pump according to one of the preceding claims, characterized in that
der Hydraulikanschluss (6) über einen Druckübersetzer (13) mit einem Hydraulikaggregat (12) verbunden ist. the hydraulic connection (6) via a pressure booster (13) with a hydraulic unit (12) is connected.
4. Membranpumpe nach Anspruch 3 4. Diaphragm pump according to claim 3
dadurch gekennzeichnet, dass characterized in that
der Druckübersetzer (13) als Druckübersetzerkolben ausgeführt ist . the pressure booster (13) is designed as a pressure booster piston.
5. Membranpumpe nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass sie auf gleicher Höhe wie der Vorlagebunker (11) angeordnet ist . 5. Diaphragm pump according to one of the preceding claims, characterized in that it is arranged at the same height as the storage bunker (11).
6. Membranpumpe nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass 6. Diaphragm pump according to one of the preceding claims, characterized in that
sie mehrfach angeordnet ist. it is arranged several times.
7. Membranpumpe nach einem der vorstehenden Ansprüche dadurch gekennzeichnet, dass 7. Diaphragm pump according to one of the preceding claims, characterized in that
der Zugang für den Staub und der Abgang für den Staub die Auflockerungsfläche (4) durchdringen. the access for the dust and the outlet for the dust penetrate the loosening surface (4).
8. Verfahren zur pneumatischen Hochdruckförderung von fluidisierten Stäuben mit einer Membranpumpe nach einem der Ansprüche 1 bis 7, in einer Staubfördereinrichtung, 8. A method for pneumatic high-pressure delivery of fluidized dusts with a diaphragm pump according to one of claims 1 to 7, in a dust conveyor,
bei dem in which
die Staubfördereinrichtung einen Vorlagebunker (11) aufweist,  the dust conveying device has a supply bunker (11),
der Vorlagebunker (11) eine Schüttung von fluidisiertem Staub beinhaltet,  the supply bunker (11) contains a bed of fluidized dust,
der Auslass des Vorlagebunkers (11) über eine pneumatische Saugleitung (17) mit der Einlassarmatur (8) der Membranpumpe verbunden ist,  the outlet of the storage bunker (11) is connected to the inlet fitting (8) of the membrane pump via a pneumatic suction line (17),
demzufolge consequently
- die Membran (3) hydraulisch nach oben ausgelenkt wird, ein Unterdruck in dem Staubraum (1) erzeugt wird und über die geöffnete Einlassarmatur (8) fluidisierter Staub in den Staubraum (1) angesaugt wird,  - The membrane (3) is hydraulically deflected upward, a negative pressure in the dust chamber (1) is generated and via the opened inlet fitting (8) fluidized dust is sucked into the dust chamber (1),
die Einlassarmatur (8) geschlossen wird,  the inlet fitting (8) is closed,
- der Staubraum (1) mit Gas über den Gasanschluss (5) auf den erforderlichen Hochdruck bespannt wird,  - The dust chamber (1) is covered with gas through the gas connection (5) to the required high pressure,
die Auslassarmatur (7) geöffnet wird,  the outlet fitting (7) is opened,
der Staub unter Gaszugabe über den Gasanschluss (5) aus dem Staubraum (1) herausbefördert wird, während gleich- zeitig das Volumen des Staubraums durch hydraulische the dust is fed out of the dust chamber (1) with the addition of gas via the gas connection (5), while at the same time the volume of the dust chamber is controlled by hydraulic
Auslenkung der Membran (3) nach unten reduziert wird. Deflection of the membrane (3) is reduced down.
9. Verfahren nach Anspruch 8 dadurch gekennzeichnet , dass 9. The method according to claim 8 characterized in that
der Staubraum (1) entspannt wird. the dust chamber (1) is relaxed.
10. Verfahren nach einem der vorstehenden Ansprüche 8 bis 9 und Anspruch 6 10. The method according to any one of the preceding claims 8 to 9 and claim 6
dadurch gekennzeichnet , dass characterized in that
die Pumpenzyklen der Membranpumpen phasenversetzt zueinander ablaufen . The pump cycles of the diaphragm pumps phase-shifted run each other.
11. Verfahren nach einem der vorstehenden Ansprüche 7 bis 10 dadurch gekennzeichnet , dass 11. The method according to any one of the preceding claims 7 to 10, characterized in that
der Unterdruck in dem Staubraum (1) erzeugt wird, indem Unterdruck über den Gasanschluss (5) angelegt wird. the negative pressure in the dust chamber (1) is generated by applying negative pressure via the gas connection (5).
12. Verfahren nach Anspruch 11 12. The method according to claim 11
dadurch gekennzeichnet , dass characterized in that
über den Gasanschluss (5) ein Unterdruck angelegt wird, der dem Betrag nach dem Förderdifferenzdruck gleicht. via the gas connection (5), a negative pressure is applied, which is equal to the amount of the delivery differential pressure.
13. Verfahren nach einem der vorstehenden Ansprüche 8 bis 12 dadurch gekennzeichnet , dass 13. The method according to any one of the preceding claims 8 to 12, characterized in that
der Vorlagebunker (11) unter Atmosphärendruck steht. the supply bunker (11) is at atmospheric pressure.
EP16822973.0A 2016-01-27 2016-12-20 Diaphragm pump comprising dust suction from below Active EP3390818B1 (en)

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WO2017129327A1 (en) 2017-08-03
US20190063419A1 (en) 2019-02-28
CN108603498B (en) 2020-05-22
EP3390818B1 (en) 2020-05-20
DE102016201182A1 (en) 2017-07-27
US10914299B2 (en) 2021-02-09
CN108603498A (en) 2018-09-28

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