EP0939677B1 - Stülpfilterzentrifuge - Google Patents

Stülpfilterzentrifuge Download PDF

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Publication number
EP0939677B1
EP0939677B1 EP97948818A EP97948818A EP0939677B1 EP 0939677 B1 EP0939677 B1 EP 0939677B1 EP 97948818 A EP97948818 A EP 97948818A EP 97948818 A EP97948818 A EP 97948818A EP 0939677 B1 EP0939677 B1 EP 0939677B1
Authority
EP
European Patent Office
Prior art keywords
solids
filter centrifuge
dryer
invertible filter
gas
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.)
Expired - Lifetime
Application number
EP97948818A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0939677A1 (de
Inventor
Hans Gerteis
Gerd Mayer
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.)
Heinkel Industriezentrifugen GmbH and Co
Original Assignee
Heinkel Industriezentrifugen GmbH and Co
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 Heinkel Industriezentrifugen GmbH and Co filed Critical Heinkel Industriezentrifugen GmbH and Co
Publication of EP0939677A1 publication Critical patent/EP0939677A1/de
Application granted granted Critical
Publication of EP0939677B1 publication Critical patent/EP0939677B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
    • B04B3/025—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges with a reversible filtering device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/12—Other accessories for centrifuges for drying or washing the separated solid particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/10—Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges
    • B04B2005/105—Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges being a grinding mill

Definitions

  • the invention relates to an inverting filter centrifuge for separation of a solid-liquid mixture with downstream Solids dryer, being in the inverting filter centrifuge by centrifugation, compressed gas presses and heat convection with the help of a flowing dry gas and in the solids dryer by heat convection with the help of a flowing Dry gas a dehumidification and drying of the Solid takes place.
  • Inverting filter centrifuges are known (DE 43 16 081 C1), a mechanical one in the rotating centrifugal drum Dehumidification and drying of the adhering to the drum wall Filter cake takes place and the filter cake for further dehumidification is flowed through with dry gas, whereby the efficiency of dehumidification and drying naturally on the temperature and speed of the flow Gases depends. It is also known in such inverting filter centrifuges before flowing through the filter cake with Dry the capillaries of the filter cake with an under relatively high pressure gas to blow so Dry gas to open the way.
  • the drying gas used for dehumidification and drying process both in the inverting filter centrifuge as well as contaminated with pollutants in the solids dryer it must either be disposed of or in a processing plant be treated so that the cleaned Trokkengas in the circuit for dehumidification and drying in the Inverting filter centrifuge and reused in the solids dryer and fresh gas consumption to a minimum is reduced.
  • Solids in the solids dryer make themselves often larger solid agglomerates are noticeable due to too high compression or too high capillary binding forces can arise. In this case it must be before the entrance disagglomeration of the solid in the solid dryer, i.e. Size reduction.
  • the inverting filter centrifuge 1 shown in the drawing comprises a rotatably mounted in a machine housing 2 Hollow shaft 3, which has a (not shown) motor in rapid circulation can be moved.
  • the hollow shaft 3 extends the machine housing 2 on the Front closing partition 4 and has a Axial spline (also not shown) in which a wedge piece 5 is axially displaceable.
  • This wedge piece 5 is rigid with an inside of the hollow shaft 3 displaceable shaft 6 connected, thus together rotates with the hollow shaft 3, but axially in this is movable.
  • a pot-shaped centrifugal drum 7 rotatably flanged. On its circular cylindrical side wall the centrifugal drum 7 radially extending passage openings on.
  • the drum 7 is closed on one side by a base 8 and on the floor 8 opposite it Open face.
  • On the one surrounding the open face The edge is essentially cylindrical Filter cloth 9 tightly clamped, its opposite Edge is tightly connected to a bottom piece 11.
  • the bottom piece 11 is rigid with the sliding, the bottom 8 freely penetrating shaft 6 connected.
  • the closed centrifugal drum 7 (Fig. 1) runs in one certain section of the machine housing 2 um.
  • liquid (Filtrate) which is pressed out of the centrifugal drum 7 gets into a discharge line 14, which via a bellows 15 flexibly connected to the machine housing 2 is.
  • the discharge line 14 is through a shut-off valve 16 closable.
  • the liquid separated is spun off Solid from the filter cloth 9.
  • This section of the machine housing 2 is flexible with a bellows 17 a solids dryer 10 connected.
  • the solids dryer 10 is through a shut-off valve 18 opposite the machine housing 2 tightly closable.
  • another deagglomerator 19 arranged which of the previous size reduction of the solid entering the solids dryer 20 serves. This disagglomerator is not essential required.
  • the one that is thrown off and possibly crushed Solid dryers 10 that hold solid 20 comprises a container 21 which is separated by e.g. electrical Heater 22 is heated. The heat is there transferred to the solid 20 by thermal contact, whereby the solid 20 is subjected to drying.
  • the container 21 is on its underside by a pivotable flap 23, which with continuous perforations 24 is provided, closable. With the flap open 23 the dried solid 20 passes into another Container 25, the outlet through a shut-off valve 26 optionally is tightly closable. With the outlet of the container 25 a product receptacle can be connected, in which with the shut-off valve 26 open, the dried one Solid 20 is filled.
  • the container 25 has one Inlet port 27 for dry gas, which through the perforations 24 the flap 23 the solid 20 in the container 21st flows through and flows off via a line 28.
  • the inverting filter centrifuge 1 is still with a filling tube 29 provided, which for feeding a solid into their and liquid components to be broken down suspension serves in the interior of the centrifugal drum 7 (Fig. 1) and in the operating state shown in FIG. 2 into a Bore 31 of the displaceable shaft 6 penetrates, the Shifting the shaft 6 and thus the opening and closing the centrifugal drum 7 over (not shown, on the Drive motors on the right, e.g. hydraulic, he follows.
  • the inverting filter centrifuge 1 takes the 1 drawn position.
  • the sliding shaft 6 is retracted into the hollow shaft 3, causing the filter cloth 9 is slipped into the centrifugal drum such that inside the through openings in the drum casing covered.
  • the centrifugal chamber cover 13 closes the open face of the centrifugal drum 7.
  • the liquid Components of the suspension pass through as a filtrate the filter cloth 9 and the passage openings in the drum jacket through into the machine housing 2 and there in the discharge line 14 passed.
  • the solid particles of the Suspensions are in the form of a filter cake from the filter cloth 9 withheld.
  • the arrangement described including the machine housing 2 and centrifugal drum 7 is rigid in itself and pivoted about a horizontal axis of rotation 32.
  • the Axis 32 is in turn on an elastic buffer element 33 arranged, which in turn on a fixed, e.g. base 34 connected to the ground rests. Between the machine housing 2 and the base 34 is at a distance of a force measuring element 35 is arranged on the axis of rotation 32.
  • the whole arrangement acts as a kind of beam scale: through the one introduced into the centrifugal drum 7 via the filling tube 29 Substance becomes the one to the left of the axis of rotation 32 Side of the inverting filter centrifuge 1 loaded, which the force measuring element 35 located to the right of the axis of rotation 32, which can be claimed by train, for example being affected.
  • the weight measured in this way can be used to control the filling volume of the centrifugal drum 7 can be exploited.
  • the force measuring element can also 35 as a sensor for the present degree of dehumidification of the Solid material can be exploited, as the liquid is thrown off leads to a reduction in weight.
  • the filling tube 29 is with a line 41 connected, via which a gas into the interior of the centrifugal drum 7 can be introduced.
  • the free end of the Filler tube 29 is for this purpose via a rotatable seal 42 inserted gas-tight in the centrifugal drum 7.
  • a person under relatively high pressure Gas introduced into the interior of the centrifugal drum 7 be used to blow through the still with moisture filled capillaries of the solid adhering to the filter cloth 9 (Filter cake) is used.
  • the exhaust gas that penetrates the solid has, is via an outlet 43 and a line 44 dissipated.
  • the purely mechanical Spin drying with heat convection drying can be combined with the help of a flowing gas.
  • the filter cake is pressurized to It is possible to blow free of its capillaries.
  • Line 41 which contains a shut-off valve 45, is on its end opposite the filling pipe 29 with a device 46 for the delivery of the specified purposes Gases connected.
  • the device 46 includes (in known and not shown) except one Gas source in particular a compressor and heating devices, to the gas supplied via the fill pipe 29 to the desired one Bring pressure and the desired temperature.
  • the device 46 is also used for reprocessing of the exhaust gas supplied via line 44. To for this purpose the device 46 contains in a manner known per se Way especially dehumidifiers (condensers), Filter devices, gas washing devices, adsorption devices and the like The processed gas will circulating again via line 41 the inverting filter centrifuge 1 fed.
  • Line 47 Via a connected to the inlet port 27 on the container 25 Line 47, which contains a valve 48, can exit the device 46 drying gas introduced into the solid dryer 10 where it penetrates the solid 20, dries and is discharged via line 28.
  • Line 28 transports the exhaust gas loaded with moisture in the apparent from the drawing to the device 46th back to where it is reprocessed and via line 47 in the Circulation is fed back to the solids dryer 10.
  • Line 28 contains in the flow path behind the solids dryer 10 a filter 51 for separating pollutants. Via a line branched off from line 41 52 with valve 53, the filter 51 can be backwashed. During the backwash, a line 28 is provided Valve 54 closed.
  • valve 55 From line 28, which is near the device 46 contains further valve 55, branches a line 56 with valve 57 from which contains a vacuum pump 58 (suction pump) and leads back to the device 46, so that also from the vacuum pump 58 withdrawn gas can be reprocessed there can.
  • valves 53, 55 closed and valves open 54 With valves 53, 55 closed and valves open 54, 57 can thus in the container 21 of the solids dryer 10 a vacuum (negative pressure) is generated, which the Dehumidification of the solid 20 in the container 21 favors.
  • valve 48 is normally in the line 47 closed. However, the valve may be convenient 48 slightly open, so that via line 47 a small amount of dry gas occurs and the solid 20 flows through as a so-called "creeping gas". This creeping gas is used for better transport and removal in a vacuum resulting steam via line 28.
  • the Solid 20 in the container 21 also a pressure change stress undergo what leads to deagglomeration or comminution of the solid 20 leads. Cause for this is the resulting in the agglomerated solid 20 Vapor pressure.
  • the valve 54 in line 28 and that Valve 48 in line 47 alternately opened and closed.
  • the valves 54 and 48 are used for this purpose corresponding control devices 61 and 62 connected.
  • the system shown on the drawing also contains already mentioned, designed as a force measuring element 35 and for example the determination of the degree of dehumidification Serving sensor still other sensors:
  • a sensor 63 is arranged for measuring pressure and / or temperature of the supplied via this line 47 Dry gas is used.
  • Additional sensors 64 on the solids dryer 10 are arranged, are used to determine the temperature and / or the residual moisture of the solid 20 or the temperature and / or the moisture content of the exhaust gas in the dryer 10.
  • a sensor 65 on the liquid discharge line 14 is used to measure the flow rate and / or to determine the pH of the filtrate.
  • a sensor 66 on the shaft 3 of the inverting filter centrifuge 1 is used for the measurement the rotational speed of the centrifugal drum 7.
  • the temperature can be measured via a sensor 67 in the exhaust line 44 of the exhaust gas and the amount of moisture it contains be determined.
  • a sensor 68 in line 41 is used to determine the pressure and humidity of the Gas fed to the centrifugal drum 7 via the filling pipe 29.
  • a sensor 69 on the filling tube 29 for sensing the inflow amount and / or the temperature of the supplied Suspension arranged. All of these sensors to which if necessary, other sensors can step, are on lines, for the sake of clarity the drawing are not shown, with a Control device 71 connected to the device 46 for the delivery and recycling of the required gases connected.
  • This control device 71 is in on programmable in a known manner, so that the operational sequence the described arrangement in a controlled manner self-regulating can be controlled automatically, in particular the duration and intensity of each ongoing drying processes, for example the Duration of the spin cycle or the duration of the feed of dry gas via line 47 matched accordingly becomes. Details of these control operations are given below still explained.
  • inverting filter centrifuge 1 and solids dryer 10 form a unit or an overall system, however, both the inverting filter centrifuge 1 is like also the solids dryer 10 has its own, self-contained System.
  • inverting filter centrifuge 1 In the inverting filter centrifuge 1 are in a first section the steps of filling, spinning, washing and final spin, optionally spin under Pressure, performed. This section will cover everyone Steps, except spin under pressure, no gas and only a small amount of gas is required for pressure spinning.
  • the solid (filter cake) is in the inverting filter centrifuge 1 for the purpose of convective Dried with gas.
  • the drying result is both the condition of the gas (humidity, temperature) as well as the amount of gas and the flow rate dependent. This section becomes a relative large amount of gas needed.
  • the conditions in the solid-state dryer 10 are related on the above-described processes in the inverting filter centrifuge 1 just the other way round.
  • a first section the solid 20 in the container 21 from a large amount Gas flows through, even if you have an additional contact drying uses the heater 22.
  • a second section in the solids dryer 10 a final drying is carried out under vacuum theoretically no gas flow required.
  • the solid 20 with a small amount of gas a so-called To flow through "creeping gas" because of this the Transport of the last, evaporating under the influence of the vacuum Liquid is facilitated.
  • this second section practically none or only one becomes extreme small amount of gas needed.
  • the optimal splitting into the individual drying sections both in the inverting filter centrifuge 1 and in Solids dryer 10 is controlled by a self-controlling Process in the sense of a control loop, as previously described, reached, as already indicated, several Sensors and the control device 71, which with the Dry gas supply device 46 is connected, used become.
  • This allows the smallest possible total time the total separation of liquid and solid including Dehumidification and drying of the solid achieved when the dehumidification and drying processes in the inverting filter centrifuge 1 and in the solids dryer 10 through the sensors that are on temperature, Address moisture, weight, flow rate, pressure, etc., be continuously monitored.
  • the measured values are then constantly updated with the target values for dehumidification and drying both in the inverting filter centrifuge 1 and compared in the solids dryer 10.
  • the target values are based on known or determined operating data for an economic Dehumidification and drying are decisive.
  • the drying process ended in the solids dryer 10 and simultaneously the drying process in the inverting filter centrifuge 1 interrupted.
  • the solids dryer 10 will open by the flap 23 is emptied, and from the inverting filter centrifuge 1 becomes new, pre-dried solid in the solid dryer 10 transferred.
  • the drying process takes place in the solids dryer 10 so that the target values have not yet been reached, too if the inverting filter centrifuge 1 has already reached its target value the drying result in the inverting filter centrifuge 1 e.g. by increasing the gas throughput in the centrifugal drum 7, a temperature increase of Drying gas, etc. can be improved. Also, if necessary the speed of the centrifuge can be increased to to improve mechanical drying (drainage). This allows the solid dryer to be more pre-dried Product are fed, which then in the shorter Time can be dried in the solids dryer. The operating times of inverting filter centrifuge and solids dryer thereby harmonize with each other.
  • the operating data of the Solids dryer 10 can be converted accordingly. Also a change in the operating data of both the inverting filter centrifuge 1 as well as the solids dryer 10 is possible so a harmonious or synergetic interaction to achieve these two devices.
  • the from the inverting filter centrifuge 1 and the solids dryer 10 systems formed themselves with the objective e.g. one minimum total uptime, with the proportions of mechanically dehumidification achieved by centrifugation and thermal dehumidification carried out by dry gas Batch to batch significantly different in terms of time and results can deviate.
  • the operation of the from the inverting filter centrifuge 1 and the solid dryer 10 existing system can basically can also be controlled so that fixed, e.g. for the the respective product specifies times determined by tests, and the dehumidification and drying processes in the inverting filter centrifuge 1 and in the solids dryer 10 interrupts. It is possible e.g. a division of the dehumidification and drying times into Inverting filter centrifuge 1 and solids dryer 10 in the ratio 1: 1 or in other ratios, depending on the existing operating conditions and target values to be achieved while maintaining the most economical and rational way of working.

Landscapes

  • Drying Of Solid Materials (AREA)
  • Centrifugal Separators (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP97948818A 1996-11-22 1997-10-28 Stülpfilterzentrifuge Expired - Lifetime EP0939677B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19648511A DE19648511C1 (de) 1996-11-22 1996-11-22 Stülpfilterzentrifuge
DE19648511 1996-11-22
PCT/EP1997/005937 WO1998023380A1 (de) 1996-11-22 1997-10-28 Stülpfilterzentrifuge

Publications (2)

Publication Number Publication Date
EP0939677A1 EP0939677A1 (de) 1999-09-08
EP0939677B1 true EP0939677B1 (de) 2001-01-03

Family

ID=7812538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97948818A Expired - Lifetime EP0939677B1 (de) 1996-11-22 1997-10-28 Stülpfilterzentrifuge

Country Status (8)

Country Link
EP (1) EP0939677B1 (zh)
JP (1) JP2001509068A (zh)
CN (1) CN1083738C (zh)
AT (1) ATE198430T1 (zh)
DE (1) DE19648511C1 (zh)
ES (1) ES2153218T3 (zh)
RU (1) RU2182852C2 (zh)
WO (1) WO1998023380A1 (zh)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19732006C1 (de) * 1997-07-25 1998-11-19 Heinkel Ind Zentrifugen Vorrichtung zur Durchführung einer Gewichtsmessung bei Zentrifugen
DE19839846B4 (de) * 1998-09-02 2007-01-04 Gebr. Steimel Gmbh & Co. Maschinenfabrik Zentrifuge
DE10115381A1 (de) * 2001-03-28 2002-10-24 Heinkel Ag Stülpfilterzentrifuge
DE10223590B3 (de) * 2002-05-27 2004-02-19 Klaus Lanner Mobile Späne-Aufbereitungsanlage
DE10245013A1 (de) * 2002-09-20 2004-04-01 Heinkel Aktiengesellschaft Filterzentrifuge
DE10323516B3 (de) * 2003-05-24 2004-10-28 Johannes Gerteis Vorrichtung zur Entfeuchtungsmessung zur Steuerung einer Filterzentrifuge
DE102005028832A1 (de) * 2005-06-15 2006-12-28 Fima Maschinenbau Gmbh Zentrifugenvorrichtung mit verbesserter Prozessanalysetechnologie
DE102006009200A1 (de) 2006-02-22 2007-08-30 Fima Maschinenbau Gmbh Verfahren für den Betrieb einer Zentrifuge
US8226822B2 (en) 2009-04-27 2012-07-24 Hamilton Sundstrand Corporation Combined oil filter and debris monitor
US20140370499A1 (en) * 2011-12-23 2014-12-18 The Broad Institute, Inc. Device and method for fragmenting polymers and particles
WO2019191155A1 (en) * 2018-03-27 2019-10-03 M-I L.L.C. Centrifuge system
KR102646571B1 (ko) * 2020-10-05 2024-03-11 주식회사 엘지화학 연속식 원심 탈수기
CN114738995B (zh) * 2022-05-07 2023-03-14 宁波方太厨具有限公司 热力池组件及包含其的燃气热水器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE948497C (de) * 1954-09-08 1956-08-30 Krauss Maffei Ag Kontinuierlich arbeitende Zentrifuge mit einer nachgeschalteten heissgas- oder heissdampfbetriebenen Trockeneinrichtung
DE3615013C1 (en) * 1986-05-02 1987-06-11 Krauss Maffei Ag Method for monitoring the drying phase in filtration centrifuges
DE3630920C1 (en) * 1986-09-11 1988-04-07 Ferdinand Dipl-Ing Reif Device for drying solid material discharged from a centrifuge
DE4316081C1 (de) * 1993-05-13 1994-08-04 Heinkel Ind Zentrifugen Vorrichtung zur Durchführung einer Gewichtsmessung bei Zentrifugen
DE19529256A1 (de) * 1995-08-09 1996-08-22 Heinkel Ind Zentrifugen Verfahren und Vorrichtung zum Reinigen der Schleudertrommel und des Filtertuches an einer Stülpfilterzentrifuge

Also Published As

Publication number Publication date
EP0939677A1 (de) 1999-09-08
ATE198430T1 (de) 2001-01-15
WO1998023380A1 (de) 1998-06-04
CN1083738C (zh) 2002-05-01
RU2182852C2 (ru) 2002-05-27
JP2001509068A (ja) 2001-07-10
DE19648511C1 (de) 1998-04-16
ES2153218T3 (es) 2001-02-16
CN1238716A (zh) 1999-12-15

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