EP1468744B1 - Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange - Google Patents

Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange Download PDF

Info

Publication number
EP1468744B1
EP1468744B1 EP04405167A EP04405167A EP1468744B1 EP 1468744 B1 EP1468744 B1 EP 1468744B1 EP 04405167 A EP04405167 A EP 04405167A EP 04405167 A EP04405167 A EP 04405167A EP 1468744 B1 EP1468744 B1 EP 1468744B1
Authority
EP
European Patent Office
Prior art keywords
acceleration
mixture
funnel
screen
pusher
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
EP04405167A
Other languages
German (de)
English (en)
Other versions
EP1468744A1 (fr
Inventor
Harald Dr. Reinach
Roy Geiger
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.)
Ferrum AG
Original Assignee
Ferrum 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 Ferrum AG filed Critical Ferrum AG
Priority to EP04405167A priority Critical patent/EP1468744B1/fr
Publication of EP1468744A1 publication Critical patent/EP1468744A1/fr
Application granted granted Critical
Publication of EP1468744B1 publication Critical patent/EP1468744B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • 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

Definitions

  • the invention relates to a pusher centrifuge according to the preamble of independent claim 1.
  • centrifuges for drying wet substances or moist substance mixtures centrifuges in various embodiments are widely used and are used in a variety of fields.
  • discontinuously operating centrifuges such as peeler centrifuges
  • continuously operating pusher centrifuges are advantageously used.
  • a solid-liquid mixture for example a suspension or a moist salt or salt mixture
  • a mixture distributor of a rapidly rotating drum which is designed as a filter, fed so that due the centrifugal forces acting the liquid phase is eliminated through the filter, while inside the drum wall, a solid cake is deposited.
  • the rotating drum is a substantially disc-shaped, arranged synchronously mitrotierender moving floor, depending on the number of screening stages either the sliding floor or a screening stage in the axial direction in the drum oscillates with a certain amplitude, so that a part of the dried solid cake is pushed out at one end of the drum.
  • drum diameter up to 1000 mm and more are quite common and typical rotational frequencies of the drum, depending on the drum diameter of up to 2000 revolutions per Minute and more can be achieved. In this case usually requires a larger drum diameter because of the strong centrifugal forces occurring a smaller maximum rotational frequency of the drum.
  • the operating parameters, such as the rotational frequency of the drum, the amount of mixture supplied per unit time or the drum diameter or the type of pusher centrifuge used also depend on the material to be dried itself, the content of liquid and so on.
  • pusher centrifuges are usually continuous filter centrifuges. So revealed the DE 689 951 For example, a pusher, in which the distribution of the material to be hurled takes place within the centrifugal drum through a conical inlet funnel which revolves with it.
  • single-stage and multi-stage pusher centrifuges are known, wherein the multi-stage pusher centrifuge from an outer screen drum and at least one arranged in the outer screen drum screening stage, which is also designed as a screen drum consists.
  • several screening stages can be arranged concentrically in one another, so that two, three and multi-stage pusher centrifuges can be realized, all screening stages being driven very quickly synchronously about a common axis of rotation.
  • a solid-liquid mixture to be separated passes continuously through a stationary inlet pipe into a mixture distributor arranged in the innermost screening stage, which also co-rotates synchronously, and is uniformly distributed over its entire screen circumference at the innermost screening stage. Most of the liquid is already centrifuged off here and a solid cake is formed.
  • a two-stage pusher centrifuge performs the innermost stage, which is also referred to as the first stage, in addition to the rotational movement about the axis of rotation of an oscillatory movement in the direction of the axis of rotation.
  • This oscillatory movement is generated hydraulically via a thrust piston with reversing mechanism.
  • the solids cake is pushed in ring sections, corresponding to the stroke length of the oscillation, from the first to the second stage and finally leaves the pusher centrifuge via an outlet opening.
  • the solid cake in the sieve drum is washed continuously with the addition of washing liquid on the solid cake.
  • a single-stage pusher centrifuge does not include any further screening stages except the outer screening drum.
  • the moving soil oscillates, which simultaneously co-rotates synchronously with the outer sieve drum.
  • a well-known two-stage pusher centrifuge which operates on the previously described principle is, for example, in DT 25 42 916 A1 described in detail, while a known method for operating a pusher centrifuge, in particular a single-stage pusher centrifuge, including the EP 0 466 751 B1 can be removed.
  • the first stage ie the innermost screening stage, essentially serves for pre-dewatering of the mixture and for forming a solids cake, while the outer screening drum serves primarily as a drying stage.
  • multistage pusher centrifuges achieve a significantly higher liquid absorption capacity than single-stage pusher centrifuges, so that mixtures with lower inlet concentrations, ie with a higher liquid content, can be processed.
  • this advantage over single-stage pusher centrifuges is at least partially compensated by the fact that multistage pusher centrifuges are of course much more complex in terms of their design, which of course makes them more expensive to maintain and to purchase.
  • Special applications are special designs, especially for two-stage and multi-stage pusher centrifuges, especially for highly abrasives Spun goods, such as coal and rock phosphate known that require special wear protection measures, such as wear-resistant sieves.
  • Special designs for intensive washing processes and for carrying out special washing processes, for example countercurrent washing in nitrocellulose, are also known from the prior art.
  • Gas-tight versions of single-stage and multi-stage pusher centrifuges for operation under a protective gas atmosphere are also used.
  • one-stage and multi-stage pusher centrifuges have long been well known, as briefly outlined above, also for special applications in a wide variety of design variants, the known one-stage and multistage pusher centrifuges nevertheless have various serious disadvantages. Even if, for example, with the known multi-stage pusher centrifuges lower inlet concentrations, i. Mixtures with an increased liquid content can be processed better than with ordinary single-stage pusher centrifuges, the inlet concentration of the mixture to be processed must not be arbitrarily small. That is, if the proportion of liquid in the mixture is too high, for example 50% or 70% or 80% or even more than 90% liquid phase, the mixture must often be pre-thickened in more or less expensive processes.
  • the object of the invention is therefore to propose an improved pusher centrifuge which largely avoids the disadvantages known from the prior art and in particular allows a mixture introduced through the inlet pipe to be accelerated so gently to the full peripheral speed that grain breakage, in particular, is avoided.
  • the invention thus relates to a pusher centrifuge for separating a mixture into a solid cake and into a liquid phase.
  • the pusher centrifuge according to the invention comprises an outer rotatable about an axis of rotation Sieve drum, arranged in the screen drum mixture distributor with a push floor device and a feed device, wherein the push floor device is arranged and configured so that the solid cake is displaceable by means of the push floor device and the feed through the mixture through the mixture distributor into a void is introduced, which when moving the solid cake is formed by the push floor device.
  • the mixture distributor comprises at least one funnel for pre-acceleration of the mixture, wherein the funnel is rotatably arranged about a drive axis and is rotatable about the drive axis by means of a drive with a predeterminable speed.
  • the inlet funnel has a curved course, with an opening angle of the inlet funnel increasing in the direction of the push floor device.
  • the pusher centrifuge according to the invention other than, for example, in the DE 689 951 Sliding spinner disclosed, an inlet funnel having a curved course, wherein an opening angle of the inlet funnel increases in the direction of the sliding floor device towards.
  • the mixture is not abruptly accelerated in the region of the inlet funnel, ie in the shortest possible time to the full rotational speed of the outer screening drum, whereby, for example, grain breakage and other damaging effects on the mixture can be avoided ,
  • the pusher centrifuge according to the invention is used to separate a mixture into a solids cake and into a liquid phase and comprises as essential components a rotatable about an axis of rotation about a drum axis outer screen drum, which is housed in a housing.
  • the inventive pusher centrifuge can be designed as a single-stage, two-stage or higher-stage pusher centrifuge.
  • the drum axis is connected to a drum drive in a conventional manner in operative connection, so that the outer screen drum is displaceable by the drum drive in rapid rotation about the axis of rotation.
  • at least one further screening stage is arranged in the case of higher-stage, ie two-stage or multistage, pusher centrifuges.
  • a mixture distributor with a pusher bottom device is provided in the screen drum, wherein either the screening stage and / or the pusher bottom device along the axis of rotation is arranged back and forth, so that the solid cake is displaceable by means of the pusher bottom device.
  • Both the outer screen drum, as well as, as in multi-stage pusher centrifuges, the further screening stage have screen openings through which in a known manner with rapid rotation liquid phase from the solid cake or from the mixture, which, as described below in more detail , in single-stage pusher centrifuges on an inner peripheral surface of the drum, or on an inner Siebgen simulation the Sieblace multistage pusher centrifuges, can be applied, can be discharged by the centrifugal forces occurring to the outside.
  • the screening drum and / or the screening stage can be designed, in a manner known per se, as a skeletal supporting drum, which is lined with special filter sheets on its periphery to form the corresponding screening surfaces, i. the skeletal support drum can be configured for example with one or more filter screens with different or equal sized filter openings for the deposition of the liquid phase.
  • the mixture distributor with the pusher plate device and the feed device is arranged, which allows continuously fed through the feed device mixture on the inner peripheral surface of the screen drum or multi-stage pusher centrifuges on the Siebgen Chemistry the screening stage by introducing into the void, when moving the Solid cake arises, distribute.
  • the pusher bottom device is designed as an annular region that with the annular region in single-stage pusher centrifuges in the screening drum, and multistage pusher centrifuges in the screening stage, deposited solid cake by a later described in more detail oscillation of the pusher bottom device and / or the screening stage , in single-stage pusher centrifuges from the screening drum, or in multi-stage pusher centrifuges in the screening drum or in any other existing screening stage, is displaced.
  • the mixture distributor comprises either a funnel designed as an inlet funnel for pre-acceleration of the mixture, which extends essentially widening towards the push floor device, and / or comprises a funnel configured as a pre-acceleration funnel for pre-acceleration of the mixture extending substantially in the direction of the feed device, wherein the inlet funnel and / or the Vorbevantung hopper is rotatable about a drive axis with a predetermined speed by means of a drive.
  • the inlet funnel and / or Vorbeschieun Trent funnel for controlled pre-acceleration of the introduced mixture, regardless of the rotational speed of the outer screen drum rotatable about the drive axis with a predetermined speed.
  • the mixture unlike the pusher centrifuges known from the prior art, in the region of the inlet funnel and / or in the region of the pre-acceleration funnel does not abruptly, i. For example, grain breakage and other harmful effects on the mixture are avoidable in the shortest possible time to the full rotational speed of the outer screening drum.
  • the pusher centrifuge according to the invention in particular also mechanically very sensitive substances, even at extremely high rotational speeds of the screening drum can be processed.
  • both the inlet funnel and the pre-acceleration funnel preferably extend conically widening at a substantially constant opening angle in the direction of the push floor device or to the feed device.
  • the inlet funnel and / or the pre-acceleration funnel may also have a curved course over a predefinable range, the opening angle of the inlet funnel and / or the pre-acceleration angle of the pre-acceleration funnel being in the direction of Moving floor device towards enlarged or reduced.
  • the inlet funnel or the pre-acceleration funnel is designed as a prefilter sieve or as a pre-acceleration sieve for pre-separation of liquid phase.
  • the inlet funnel independently of the rotational speed of the outer screening drum, can be driven by the drive about the drive axis, while the Push floor device can be arranged synchronously with the screen drum rotatable about the axis of rotation.
  • the mixture distributor for pre-acceleration of the mixture may comprise a pre-acceleration funnel, which is preferably, but not necessarily, rotatably connected to the pusher bottom device, so that the pre-acceleration hopper rotates synchronously with the screen drum. It is understood that the pre-acceleration hopper may be absent in another embodiment, or also, as the inlet hopper, may have its own drive.
  • the oscillatory movement for moving the solids cake performs, for example, in a single-stage pusher centrifuge of the mixture manifold alone, while in a multi-stage pusher centrifuge a screening stage can perform a corresponding oscillatory motion.
  • the oscillatory movement of the pusher bottom device and / or the screening stage preferably takes place via a push rod, wherein in a first half period of the oscillatory motion with the outer ring portion of the deposited on the drum screen solid cake in ring sections whose width by the stroke length of the oscillatory motion of the pusher bottom device and / or the Sieve is determined, is pushed out of the sieve drum.
  • the empty space in the sieve drum and / or in the screening stage arises, so that new mixture can be introduced into the empty space.
  • the feed hopper is designed as a prefilter screen for pre-separation of liquid phase from the mixture.
  • the fact that already part of the liquid phase in the prefilter is separable from the incoming mixture and the mixture in the prefilter is adopted admirbar to a predetermined rotational speed, so that introduced by the feed before mixture of the feed drum, in single-stage pusher centrifuges, or in multi-stage pusher centrifuges ago To reach the screening stage, can be accelerated to a predetermined peripheral speed, on the one hand not the entire amount of liquid phase contained in the mixture must be accelerated to the full peripheral speed of the screen drum, since a part of the liquid phase already deposited on the prefilter and directly from the screen drum or . is separable from the screening stage.
  • mixtures with a very high content of liquid phase for example of more than 50% liquid phase or more than 70% liquid phase or even more than 90% liquid phase are easily processable.
  • a uniform distribution of the mixture to be dried over the peripheral surface of the screening stage, or of the screening drum is always ensured even with a high content of liquid phase.
  • additional facilities for pre-drainage such as static thickeners, curved screens or hydrocyclones are superfluous.
  • even the smallest particles contained in the mixture can be separated much more effectively from the solid cake by the effect of pre-filtration.
  • the inlet funnel has a curved course and the opening angle of the inlet funnel in the direction of the sliding floor device increases or decreases. Namely, it is known that different products under different operating conditions of the pusher centrifuge, for example, depending on the grain size and / or viscosity and / or other properties or parameters, such as the temperature of the mixture are different degrees of drainage.
  • the inlet funnel or the prefilter has a curved course, wherein the opening angle of the prefilter increases towards the sliding floor device. This means that the inlet funnel or the prefilter sieve widens in the direction of the push floor device, much like the horn of a trumpet.
  • the pre-acceleration funnel can of course also have a curved course, with the pre-acceleration angle of the pre-acceleration funnel increasing or decreasing in the direction of the feed device.
  • the removal of the liquid phase from the collecting means can take place in different ways.
  • the prefilter screen is arranged at one screening stage by means of one or more fastening supports, the mixture distributor comprising a pre-acceleration funnel which is rotatable about a rotation axis and drivable by a rotary drive independent of the rotation speed of the outer screening drum.
  • the mounting posts are preferably formed in the form of suitably shaped spokes, thin rods and / or tubes, so that in the operating state of the solid cake is easily removed from the screening stage or from the screen drum.
  • At least one of the fastening supports can be designed and arranged on an outer edge of a screening stage such that the liquid phase collected in the collecting means can be conveyed through the fastening support into a sieve opening of the screening stage and can be separated from the screening stage through the sieve opening. It can of course also be provided at the attachment support itself at a suitable location openings for discharging liquid phase or be provided at the screening stage at a suitable location additional openings for discharging the liquid phase.
  • the prefilter is arranged by means of one or more mounting posts instead of a screening stage on the screen drum. This may be the case in particular advantageously in single-stage pusher centrifuges.
  • the prefilter screen can also be arranged at the same time on two or more screening stages and / or the screening drum by means of one or more fastening supports, wherein the corresponding screening stages or the screening drum do not perform any oscillatory relative movement against each other.
  • the prefilter sieve can also be designed as a two-stage sieve with a coarse sieve and a fine sieve.
  • the first filter stage forms the coarse filter, which contained in the mixture particles, the larger are as the filter openings of the coarse screen holds back.
  • the fine sieve retains correspondingly finer particles, while at least a portion of the liquid phase, as well as very small particles, which must also be removed, from the screening stage, or from the screening drum in single-stage pusher centrifuges, directly dissipated.
  • the design of the prefilter sieve as a two-stage sieve has the particular advantage that the fine sieve is not so heavily mechanically loaded by large and / or heavy particles that may be contained in the incoming mixture, so that the fine sieve, for example, very small pores for filtering very small Particles may have and in particular may also be made of mechanically less resistant materials.
  • the mixture distributor may comprise a pre-acceleration funnel which, for example, extends in a substantially conically widening manner in the direction of the feed device and, in particular, may be non-rotatably connected to the push floor device.
  • the mixture distributor comprises an inlet funnel for pre-acceleration of the mixture, wherein the inlet funnel is rotatably mounted about a drive axis and by means of a drive, regardless of the rotational speed of the outer screen drum, with a predetermined speed is rotatable about the drive axis.
  • the pre-acceleration funnel can also be designed as a pre-acceleration screen, wherein the pre-acceleration screen extends in a substantially conically widening manner in the direction of the feed device.
  • the pre-acceleration funnel is configured as a pre-acceleration screen
  • part of the liquid phase in the pre-acceleration screen can be separated from the mixture and the mixture can be pre-accelerated to a predefinable rotational speed in the pre-acceleration screen, so that the mixture introduced by the feed device before reaching the screen drum in single-stage pusher centrifuges, or in multi-stage Pusher centrifuges before reaching the screening stage, can be accelerated to a predetermined peripheral speed.
  • a predefinable rotational speed in the pre-acceleration screen so that the mixture introduced by the feed device before reaching the screen drum in single-stage pusher centrifuges, or in multi-stage Pusher centrifuges before reaching the screening stage, can be accelerated to a predetermined peripheral speed.
  • Peripheral speed of the outer screen drum can be accelerated because a part of the liquid phase is already deposited on the pre-acceleration and directly from Siebtrommel or from the screening stage to the outside can be discharged.
  • mixtures with an extremely high content of liquid phase are easily processable.
  • a uniform distribution of the mixture to be dried over the peripheral surface of the screening stage or the screening drum is thus always ensured even with extremely high content of liquid phase.
  • additional facilities for pre-drainage such as static thickeners, curved screens or hydrocyclones are superfluous. Even the smallest particles contained in the mixture are more effectively separated from the solid cake by the effect of a second prefiltration.
  • the mixture unlike the pusher centrifuges known from the prior art, does not abruptly in the region of the pre-acceleration funnel, i. For example, grain breakage and other damaging effects on the mixture can not be prevented in a very short time from accelerating to the full rotational speed of the screening drum.
  • mechanically very sensitive substances even at extremely high rotational speeds of the screen drum can be processed.
  • the pre-acceleration hopper and / or the inlet funnel with respect to the axis of rotation of the screen drum have an opening angle which is smaller than 90 °, in the pre-acceleration screen and / or in the inlet funnel, the flow velocity of the mixture in comparison to the speed in free fall, ie without Vorbe instructung funnel and / or without inlet funnel, in the direction of the peripheral surface of the screening stage or the screen drum selectively changeable, so that the mixture in the region of the Vorbestructungstrichters and / or the inlet funnel with increasing approach to the outer ring area both in the radial direction and in the circumferential direction of the screen drum is gradually accelerated.
  • the mixture is in the region of the pre-acceleration funnel and / or the inlet funnel in a particularly gentle manner gradually accelerated to a predeterminable circumferential speed, in order then to reach the Peripheral surface of the outer screen drum or the screening stage finally reach the full rotational speed of the outer screen drum.
  • the value of the opening angle of the inlet funnel and / or the value of the pre-acceleration angle of the pre-acceleration funnel can be, for example, between 0 ° and 45 ° with respect to the axis of rotation, in particular between 0 ° and 10 ° or between 10 ° and 45 °, in particular between 25 ° and 45 °, preferably between 15 ° and 35 °.
  • the value of the opening angle and / or the pre-acceleration angle is greater than 45 °.
  • an acute angle is generally advantageous with respect to the axis of rotation, wherein an optimum value of the respective opening angle and / or the pre-acceleration angle is determined inter alia by the value of the static friction angle of the product to be dehydrated.
  • the pre-acceleration funnel is configured as a pre-acceleration screen
  • the pre-acceleration screen it is of course also possible for the pre-acceleration screen to be advantageously designed as a two-stage screen with a coarse filter and a fine filter.
  • the mixture can also be filtered in two stages in the region of the pre-acceleration screen, analogously to the arrangement of a two-stage screen at the inlet funnel, with the advantages already explained in detail.
  • both the prefilter sieve and the pre-acceleration sieve can in particular be made up of more than two sieving stages.
  • the inlet funnel and / or the pre-acceleration funnel can be designed as a skeletal support body which can be equipped with special filter foils to form the prefilter sieve and / or the pre-acceleration sieve, ie the skeletal support body can be provided with one or more Filter sieves, which may possibly have different sized filter openings for deposition in different stages, be equipped.
  • filter screens which may be used in particular, include slot screens or, for example, screen plates.
  • the filter screens can be advantageously provided in different ways with filter openings of different sizes.
  • the screen plates mentioned above may be punched, drilled, lasered, electron beam perforated or water jet cut, among other things, in principle, other techniques come into question.
  • the screens themselves can be made of various materials, in particular corrosion-resistant materials, such as plastics, composite materials or different steels such as 1.4462, 1.4539 or 2.4602 or other suitable materials.
  • the filter screens may be provided with suitable layers, for example hard chromium layers, tungsten carbide (WC), ceramic or otherwise hardened.
  • the thickness of the filter sheets is typically 0.2 mm to 5 mm, although significantly different sheet thicknesses are possible.
  • the special properties of the mixture to be processed require that no liquid phase is to be separated from the mixture in the pre-acceleration hopper and / or in the feed hopper, because, for example, the proportion of liquid phase in the incoming mixture is not high enough, a prefiltration of the mixture in the pre-acceleration hopper and / or naturally omitted in the inlet funnel.
  • a collecting means for discharging deposited on Vorbevantungssieb liquid phase can be provided.
  • the liquid phase can be made through a drain opening in the push floor device into a region between a rear drum wall, which is perpendicular to the axis of rotation, and a wall of the housing, which separates the drum from the drum drive.
  • the liquid phase collected in the collecting means and deposited on the prefilter sieve can thus be discharged in a particularly simple manner through the drain opening in the push floor device and then through the sieve opening out of the sieve drum.
  • the pre-acceleration funnel or the pre-acceleration screen can also be driven separately via a rotary drive.
  • the pre-acceleration hopper is then preferably configured and arranged such that the pre-acceleration hopper is rotatable by means of a rotary drive about a rotation axis with a predeterminable speed.
  • the axis of rotation for example, be arranged concentrically to this within the push rod and be driven independently of this by the rotary drive.
  • the pusher bottom device is preferably non-rotatably connected to the outer screen drum and decoupled from the pre-acceleration screen with respect to the rotation about the axis of rotation.
  • the push floor device rotates synchronously with the outer screen drum, while the pre-acceleration hopper can be driven independently of the rotational speed of the outer screen drum.
  • the pusher bottom device rotates synchronously with the pre-acceleration hopper, that is, pusher bottom device and pre-acceleration hopper are drivable together with a predetermined speed and regardless of the speed of the outer screen drum.
  • other ways of coupling rotary drive and Vorbeuggungstrichter and / or pusher device are possible, for example via suitable gear arrangements or in any other suitable manner.
  • suitable means may be provided to control and / or regulate the rotary drive, for example as a function of various operating parameters of the pusher centrifuge or as a function of the mixture to be processed or other factors.
  • the pusher centrifuge according to the invention can also comprise corresponding sensors for measuring relevant operating parameters.
  • Fig. 1 shows in section in a schematic representation of essential components of a first embodiment of a pusher centrifuge according to the invention, which has a funnel for pre-acceleration of the mixture to a drive shaft rotatably arranged inlet funnel. It is in Fig. 1 exemplified schematically a two-stage pusher centrifuge. It is understood that the representation of the Fig. 1 is to be understood as an example and the description of course also applies to single-stage pusher centrifuges and also for more than two-stage pusher centrifuges in an analogous manner and is transferable accordingly.
  • the pusher centrifuge according to the invention serves to separate a mixture 2 into a solids cake 3 and into a liquid phase 4 and comprises as essential components an outer screening drum 6 rotatable about a rotation axis 5 via a drum axis 51 housed in a housing G.
  • the drum axis 51 is connected to a drum drive, not shown, in a conventional manner in operative connection, so that the screen drum 6 can be displaced by the drum drive in rapid rotation about the axis of rotation 5.
  • multi-stage pusher centrifuges 1 such as in Fig. 1 illustrated by way of example with a two-stage pusher centrifuge, arranged at least one further screening stage 14.
  • a mixture distributor 7 with a pusher bottom device 8 and a feed device 9 is provided in the screen drum 6, wherein either the screening stage 14 or as for example in Fig. 3 illustrated, the sliding bottom device 8 is arranged back and forth along the axis of rotation 5, so that the solid cake 3 by means of the sliding floor device 8 is displaceable.
  • the mixture distributor 7 is arranged with a push floor device 8 and a feed device 9, which allows mixture 2 fed continuously through the feed device 9 onto the inner peripheral surface 62 of the screening drum 6 or in the case of multi-stage pusher centrifuges onto the screening surface 142 of the screening stage 14 by placing in a void R, which arises during the movement of the solid cake 3 to distribute.
  • the mixture 2 is by means of the feed device 9, which may include, for example, an inlet pipe 9, for pre-acceleration in the inlet hopper 101 can be fed, which extends in a substantially conically widening towards the sliding bottom device 8 out, the inlet hopper 101 about a drive axis 11, 111 rotatably mounted and by means of a drive 12, 121 rotatable about the drive axis 111 at a predetermined speed.
  • suitable, not shown means may be provided to control the drive 121, for example, depending on the mixture to be processed 2 or in dependence on suitable operating parameters of the pusher centrifuge 1 and / or to regulate.
  • the mixture 2 unlike the pusher centrifuges known from the prior art, in the region of the inlet funnel 10, 101 is not abrupt, i. In the shortest time to the full rotational speed of the screening drum 6 is accelerated, for example, grain breakage and other harmful effects on the mixture 2 can be prevented. Thus, in the pusher centrifuge 1 according to the invention, in particular also mechanically very sensitive substances, even at very high rotational speeds of the screening drum 6 can be processed.
  • the pusher bottom device 8 is formed as an annular region 81 that with the annular region 81 in single-stage pusher centrifuges 1 of the in the screen drum 6, and multistage pusher centrifuges 1 of the screen stage 14, deposited solid cake 3 by an oscillation described in more detail below along the axis of rotation 5 of the sliding floor device 8 and / or the screening stage 14, in single-stage pusher centrifuges 1 from the screening drum 6, or at multi-stage pusher centrifuges 1 in the screening drum 6 or in another screening stage 14, not shown, is displaceable.
  • the push floor device 8 rotates in the in Fig. 1 illustrated embodiment of an inventive pusher centrifuge 1 synchronously with the screen drum 6 about the axis of rotation 5.
  • the oscillatory motion, by the double arrow in Fig. 1 is indicated performs in the example shown here, the screening stage 14, while the moving floor device 8 does not oscillate.
  • the oscillatory movement is preferably generated by means of a reversing mechanism not shown here and transmitted via a push rod P, wherein in a first half period the oscillatory movement with the outer ring portion 81 of the sliding bottom device 8 deposited solid cake 3 in ring sections, the width of which is determined by the stroke length of the oscillatory motion is pushed out of sieve drum 6.
  • the empty space R arises in the sieve drum 6, so that new mixture 2 can be introduced into the empty space R.
  • the pusher bottom device 8 is rigidly coupled to the screen drum 6 by fasteners 82 and therefore rotates synchronously with the screen drum 6 and the screening stage 14 about the axis of rotation 5.
  • the mixture manifold 7 additionally includes a the push floor device 8 rotatably connected pre-acceleration funnel 102, which extends in a substantially conically widening in the direction of the feed device 9 out.
  • the mixture distributor 7 in addition to the inlet funnel 101 still includes the Vorbe instructungsstrichter 102, mechanically extremely sensitive mixtures 2 are processed, since the acceleration of the mixture 2 to the full peripheral speed of the outer screen drum 6 is done in several stages and thus extremely gently done.
  • FIG. 2a and 2b is exemplary and schematically each an embodiment of a funnel 10 shown.
  • a pre-acceleration funnel 102 is shown.
  • the reference numerals 10, 101 and 102 in Fig. 2b imply that refers to in Fig. 2b
  • the outer ring portion 81 has a predetermined height a, depending on the mixture to be processed 2 and / or the operating conditions under which the inventive pusher centrifuge 1 is operated, about 1 % to 40% of the drum radius r, preferably about 5% to 10%, in particular 5% to 20% of the drum radius r.
  • the funnel 10 may be formed as a multi-stage funnel 10, the funnel 10 for pre-acceleration of the mixture 2 may have a plurality of different angles ⁇ 1 , ⁇ 2 mutually inclined partial surfaces, wherein the relative size of the partial surface and their inclination angle ⁇ 1st , ⁇ 2 may depend, for example, on the mixture 2 to be processed or on the operating parameters of the pusher centrifuge 1.
  • both the inlet funnel 101, and the pre-acceleration funnel 102 according to Fig. 2b be designed as a multi-stage funnel.
  • the inlet funnel 101 has a curved course and the opening angle ⁇ of the inlet funnel 101 as in Fig. 2c and 2d shown schematically, enlarged or reduced in the direction of the sliding floor device 8 out.
  • the pusher centrifuge 1 for example, depending on the grain size and / or viscosity and / or other properties or parameters, such as the temperature of the mixture 2, are different degrees of drainage.
  • the inlet funnel 101 or the prefilter 1011 has a curved course, wherein the opening angle ⁇ of the prefilter 1011 in the direction of the sliding floor device. 8 enlarged.
  • FIG Fig. 2c shown schematically. This means that the inlet funnel 101 or the prefilter sieve 1011 widens in the direction of the push floor device 8 in a manner similar to the horn of a trumpet.
  • the output force, with which the mixture 2 is accelerated from the inlet funnel 101, disproportionately larger with decreasing distance to the sliding bottom device 8, so that the mixture 2, which is already relatively strongly drained in the prefilter 1011 and thus shows poor sliding properties in the prefilter 1011, can leave the prefilter sieve 1011 faster than, for example, a prefilter sieve 1011 which widens in a substantially conical manner with a constant opening angle ⁇ .
  • mixtures 2 may be present which are relatively difficult to dewater given operating parameters.
  • Vorfiltersieb 1011 a certain accumulation effect, so that the mixture 2 longer in the prefilter 1011 remains and therefore already in the prefilter 1011 is dewatered to a higher degree.
  • the pre-acceleration funnel 102 or the pre-acceleration screen 1021 can also have a curved course, the pre-acceleration angle ⁇ of the pre-acceleration funnel 102 increasing or decreasing in the direction of the feed device 9.
  • the Vorbeuggungstrichter 102 is configured and arranged so that the Vorbevantungstrichter 102 by means of a rotary drive 122 about a rotation axis 112 with a predetermined speed, regardless of the speed of the screen drum 6, is rotatable.
  • the rotation axis 112 can be as in Fig. 3 exemplarily shown be arranged within the push rod P.
  • suitable, not shown means may be provided to control the drive 12, for example, depending on the mixture to be processed 2 or in dependence on suitable operating parameters of the pusher centrifuge 1 and / or to regulate.
  • no inlet funnel 101 is provided on the mixture manifold 7, so that the mixture 2 from the feed device 9 can be introduced directly into the pre-acceleration hopper 102.
  • an inlet funnel 101 may be provided, which can be driven by a separate drive 121 about a drive axle 111 with a predetermined speed beyond.
  • a splash guard 91 which may be mounted on supports 911 on the push floor device 8 and in which the feed device 9 opens, also missing.
  • the pre-acceleration funnel 102 can rotate, for example, in one direction of the oscillation movement at a different rotational speed than in the case of the opposite oscillation movement.
  • the rotational frequency of the pre-acceleration hopper 102 can be selected so that the pre-acceleration hopper 102 rotates synchronously with the outer screen drum 6, so that between the outer ring portion 81 and the solid cake 3, which is deposited on the peripheral surface 62 of the screen drum 6 is, when moving no realtivmony with respect to the rotation around the Dreachse 5 is present, while Return, ie in the phase of the Osillationsterrorism in the white space R is charged with new mixture 2, the pre-acceleration hopper 102, for example, slower rotates than the outer screen drum 6.
  • the in Fig. 3 Pusher centrifuge 1 shown of course, be designed as a multi-stage pusher centrifuge 1 and also as a multi-stage pusher centrifuge
  • Fig. 3a shows a further embodiment according to Fig. 3 with an outer ring portion 81 configured as a blind bottom 811, which oscillates synchronously with the pre-acceleration hopper 102, and rotates at the same speed as the outer screen drum 6, which in the illustrated embodiment is generally different from the speed of the pre-acceleration hopper 102. This can be done as in Fig.
  • 3a schematically shown the blind bottom 811 via at least one Besfest Trentsstrebe 812 rotatably connected to the outer screen drum 6, wherein the mounting strut 812 with respect to the non-oscillating screen drum 6 is freely movable in the direction of the axis of rotation, that is, the mounting strut 812 is with respect to the oscillatory motion of the outer screen drum 6 decoupled.
  • the attachment strut 812 is via a pusher 813, which may, for example, comprise the axis of rotation 5 in an annular manner can also be designed as a simple support strut 813, coupled by means of a decoupling bushing 814 Schubfest with the push rod P.
  • the decoupling bushing 814 for decoupling the rotational movement of the Schubelemnts 813 from the rotational movement of the Vorbevantungstrichters 102 for example, comprise a ball bearing mechanism or otherwise configured and arranged for decoupling the relative rotational movements and arranged.
  • decoupling jack 814 may also be referred to as in Fig. 3a not shown decoupling element 814 may be formed, which may for example be suitably arranged and designed between push rod P and push floor device 8.
  • the pre-acceleration funnel 102 can be driven completely independently of the rotational speed of the outer screen drum 6 with a rotational frequency tunable to the mixture 2 to be processed, and on the other hand the blind base 811, which transports the solids cake 3 in the axial direction, rotates at the same speed as the sieve drum 6 that relative to the rotation about the axis of rotation 5 no relative movement takes place between the blind base 811 and the screening drum 6.
  • the rotational speed can be variable, for example as a function of a current operating state of the pusher centrifuge 1, as already described above.
  • Fig. 4 shows a further embodiment of an inventive pusher centrifuge 1, wherein the inlet funnel 101 is formed as a pre-filter 1011 for pre-separation of liquid phase 4 from the mixture 2 and the drive axle 111 by means of the drive 121 with a predetermined speed can be driven.
  • a significant advantage of this embodiment is that part of the liquid phase 4 is already separable from the mixture 2 in the prefilter screen 1011 and the mixture 2 in the prefilter screen 1011 can be pre-accelerated to a predefinable rotational speed, such that the mixture 2 introduced by the feed device 9 projects Reaching the screen drum 6, in single-stage pusher centrifuges 1, or in multi-stage pusher centrifuges 1 before reaching the screening stage 14, can be accelerated to a predetermined peripheral speed.
  • collecting means 13 for collecting and discharging the liquid phase 4 from the prefilter 1011 provided.
  • the discharge of the liquid phase 4, which was deposited on the prefilter screen 1011 into the collecting means 13, preferably takes place via a conduit means 131, e.g. a suitably designed and in the pusher centrifuge 1 suitably arranged pipe 131 may include.
  • the collecting means 13 in this case has to carry out the conduit means 131 in the interior of the collecting means 13 a, on one of the feed device 9 facing side extending circular disk-shaped opening groove 132, so that the rotational movement of the prefilter 1011 is not hindered by the conduit means 131.
  • the prefilter sieve 1011 can of course also be designed as a two-stage sieve with a coarse sieve and a fine sieve.
  • the first filter stage forms the coarse sieve, which particles contained in the mixture 2, which are greater than the filter openings of the coarse sieve retains.
  • the fine sieve retains correspondingly finer particles, while at least part of the liquid phase 4, as well as very small particles which also have to be removed, are directly dischargeable from the screening stage 14 or from the screening drum 6 in single-stage pusher centrifuges 1.
  • the design of the prefilter sieve 1011 as a two-stage sieve has the particular advantage that the fine sieve is not so heavily loaded mechanically by large and / or heavy particles which may be contained in the incoming mixture 2, so that the fine sieve, for example, has very small pores for filtering may have very small particles and in particular may also be made of mechanically less resistant materials.
  • Fig. 5 an embodiment of an inventive pusher centrifuge 1 is shown, in which the separately drivable Vorbevantungstrichter 102 is configured as Vorbevantungssieb 1021 for pre-separation of liquid phase 4 from the mixture 2.
  • the pre-acceleration screen 1021 is here designed as a two-stage screen with a coarse screen and a fine screen, which is the previously described in detail by the example of the prefilter screen 1011.
  • the pre-acceleration screen 1021 need not be designed as a two-stage screen.
  • the pre-acceleration funnel 102 or the pre-acceleration screen 1021 has a pre-acceleration angle ⁇ with respect to the rotation axis 5, which are, for example, between 0 ° and 45 ° with respect to the rotation axis 5, in particular between 0 ° and 10 ° or between 10 ° and 45 °, in particular between 25 ° and 45 °, preferably between 15 ° and 35 °.
  • a pre-acceleration angle ⁇ with respect to the rotation axis 5 which are, for example, between 0 ° and 45 ° with respect to the rotation axis 5, in particular between 0 ° and 10 ° or between 10 ° and 45 °, in particular between 25 ° and 45 °, preferably between 15 ° and 35 °.
  • the value of the opening angle ⁇ and / or the pre-acceleration angle ⁇ is greater than 45 °.
  • the flow velocity of the mixture 2 can be selectively changed in comparison to the free fall speed in the direction of the circumferential surface 142 of the screening stage 14, so that the mixture 2 in the region of the pre-acceleration cone 102 or the pre-acceleration screen 1021 increases with approach to the outer ring region 81 is gradually accelerated both in the radial direction and in the circumferential direction of the screen drum 6. That is, the mixture 2 is accelerated in the region of the Vorbevantungssiebs 1021 in a particularly gentle manner gradually to a predetermined peripheral speed, and then on reaching the peripheral surface 62 and the peripheral surface 142 of the screening stage 14, finally reach the full rotational speed of the screen drum 6 ,
  • the inlet funnel 101 is configured as a prefilter 1011 and arranged by means of one or more mounting brackets 15 on the screen drum 6.
  • the fastening supports 15 are preferably in the form of suitably shaped spokes 15, thin rods 15 or tubes 15, so that in the operating state the solid cake 3 can be removed from the screening stage 14 or from the screening drum 6 without problems.
  • at least one of the mounting brackets 15 is formed and arranged on an outer edge of the screen drum 6 that collected in the collecting means 13 liquid phase 4 is conveyed through the mounting bracket 15 in a screen opening 61 of the screen drum 6 and separable through the screen opening 61 from the screen drum 6 is. It can of course also to the mounting bracket 15 itself openings at a suitable location for discharging liquid phase 4 may be provided.
  • Vorfiltersieb 1011 be arranged by means of one or more mounting brackets 15 at a screening stage 14 or even at several screening stages 14 or at a screening stage 14 and the screening drum 6, wherein the corresponding drums preferably perform no oscillatory relative movement against each other.
  • the pre-acceleration funnel 102 or the pre-acceleration sieve 1021 can rotate, for example, in one direction of the oscillation movement of the screening stage 14 at a different rotational speed than in the opposite oscillation movement of the screening stage 14.
  • the rotational frequency of the pre-acceleration hopper 102 are selected such that the pre-acceleration hopper 102 rotates synchronously with the screening stage 14 so that there is no relative movement with respect to the rotation about the nozzle shaft when moving between the outer ring area 81 and the solid cake 3 deposited on the peripheral surface of the screening stage 14 5, while the return, ie in the phase of the Osillationsmos in which the empty space R is charged with new mixture 2, the pre-acceleration hopper 102, for example, slower rotates than the screening stage 14th
  • Fig. 5a is finally an embodiment according to Fig. 5 with a blind bottom 811 shown schematically, the pre-acceleration screen 1021 is not shown for clarity as a two-stage screen.
  • both the pre-acceleration screen 1021 and the prefilter screen 1011 can be configured as single, double or multi-stage screen.
  • the embodiment according to Fig. 5a has an outer annular region 81 designed as a blind bottom 811, which rotates synchronously with the outer screen drum 6, but is decoupled from the pre-acceleration hopper 102 with respect to the rotational movement, so that the pre-acceleration hopper 102 or the Vorbevantungssieb 1021 is rotatable about the rotation axis 5 at a different speed than the blind bottom 811.
  • This can, as in Fig.
  • the blind bottom 811 via at least one attachment strut 812 rotatably connected to the outer screen drum 6, wherein the mounting strut 812 is guided through a suitably placed opening 143 in the screening stage 14, so that the fastening strut 812 is decoupled from the oscillatory movement of the screening stage 14 ,
  • the embodiment gemäs Fig. 5a also applicable to higher-level than two-stage pusher centrifuges 1 analog.
  • the pre-acceleration hopper 102 is completely independent of the rotational speed of the outer screen drum 6 with a tunable to the processed mixture 2 rotation frequency driven and on the other hand rotates the blind bottom 811, which transports the solid cake 3 in the axial direction at the same speed as the screen drum 6 and the screening stage 14, so that between the blind bottom 811 and screening stage 14 with respect to the rotation about the rotation axis 5, no relative movement takes place.
  • the rotational speed can be variable, for example as a function of a current operating state of the pusher centrifuge 1, as already described above.
  • the introduced mixture can be pre-accelerated in the inlet funnel and / or in the pre-acceleration funnel to a predeterminable peripheral speed, so that the mixture does not collide with the sieve drum or the screening stage in a very short time is accelerated from a peripheral speed close to zero to the full peripheral speed of the screen drum.
  • grain breakage is avoidable, so that in particular substances that are particularly sensitive to abrupt Changes in a centrifugal or radial acceleration respond, are processed in compliance with the highest quality standards.
  • both the inlet funnel and the pre-acceleration funnel can be configured as screens for pre-separation of liquid phase
  • very low inlet concentrations can also be processed which, for example, correspond to 50% or 70% or 80% or even more than 90% proportion of liquid phase since a considerable part of the liquid phase contained in the mixture is already separable in the prefilter sieve and / or in the pre-acceleration sieve.
  • prefilter sieve and pre-acceleration sieve it is possible to process mixtures with almost arbitrarily large liquid content, without the mixture having to be pre-thickened in complex processes.

Claims (11)

  1. Centrifugeuse à poussoir pour la séparation d'un mélange (2) en un tourteau de matière solide (3) et en une phase liquide (4), comprenant un tambour tamiseur extérieur (6) apte à tourner autour d'un axe de rotation (5), un distributeur de mélange (7) disposé dans le tambour tamiseur (6) avec un dispositif à fond de poussée (8) et une installation d'alimentation (9), où le dispositif à fond de poussée (8) est disposé et configuré de telle sorte que le tourteau de matière solide (3) est déplaçable au moyen du dispositif à fond de poussée (8), et au moyen de l'installation de l'alimentation (9), le mélange (2) peut être amené par le distributeur de mélange (7) dans un espace vide (R) qui est produit lors du déplacement du tourteau de matière solide (3) par le dispositif à fond de poussée (8), où le distributeur de mélange (7) comprend au moins une trémie (10) pour l'accélération préalable du mélange (2), où la trémie (10) est disposée d'une manière tournante autour d'un axe d'entraînement (11) et peut être amenée à tourner au moyen d'un entraînement (12) à une vitesse de rotation prédéfinissable autour de l'axe d'entraînement (11), caractérisée en ce que la trémie d'entrée (101) présente une extension courbée et qu'un angle d'ouverture (α) de la trémie d'entrée (101) s'agrandit dans la direction vers le dispositif à fond de poussée (8).
  2. Centrifugeuse à poussoir selon la revendication 1, où le distributeur de mélange (7) comprend une trémie d'accélération préalable (102) qui s'étend selon un angle d'accélération préalable (β) sensiblement constant, en s'élargissant d'une manière conique en direction de l'installation d'alimentation (9).
  3. Centrifugeuse à poussoir selon la revendication 1, où la trémie d'accélération préalable (102) présente une extension courbée, et l'angle d'accélération préalable (β) de la trémie d'accélération préalable (102) s'agrandit en direction de l'installation d'alimentation (9).
  4. Centrifugeuse à poussoir selon la revendication 1, où la trémie d'accélération préalable (102) présente une extension courbée, et l'angle d'accélération préalable (β) de la trémie d'accélération préalable (102) diminue dans la direction de l'installation d'alimentation (9).
  5. Centrifugeuse à poussoir selon l'une des revendications précédentes, où la trémie d'entrée (101) est disposée d'une manière tournante autour d'un axe d'entraînement (111) et peut être amenée à tourner au moyen d'un entraînement (121) à une vitesse de rotation prédéfinissable autour de l'axe d'entraînement (111).
  6. Centrifugeuse à poussoir selon l'une des revendications précédentes, où la trémie d'accélération préalable (102) est configurée et disposée de telle sorte que la trémie d'accélération préalable (102) peut être amenée à tourner au moyen d'une commande d'entraînement en rotation (122) autour d'un axe de rotation (112) à une vitesse de rotation prédéfinissable.
  7. Centrifugeuse à poussoir selon l'une des revendications précédentes, où la trémie d'entrée (101) est réalisée comme tamis de filtration préalable (1011) pour la séparation préalable de la phase liquide (4) du mélange (2).
  8. Centrifugeuse à poussoir selon l'une des revendications précédentes, où la trémie d'accélération préalable (102) est réalisée comme tamis d'accélération préalable (1021) pour la séparation préalable de la phase liquide (4) du mélange (2).
  9. Centrifugeuse à poussoir selon l'une des revendications précédentes, où le tamis de filtration préalable (1011) et/ou le tamis d'accélération préalable (1021) est réalisé comme tamis à deux étages avec un tamis grossier et un tamis fin.
  10. Centrifugeuse à poussoir selon l'une des revendications précédentes, où des moyens de recueillement (13) sont prévus pour collecter et évacuer la phase liquide (4) du tamis de filtration préalable (1011) et/ou du tamis d'accélération préalable (1021).
  11. Centrifugeuse à poussoir selon l'une des revendications précédentes, où le tamis de filtration préalable (1011) est disposé à un étage de tamis (14) et/ou au tambour tamiseur (6).
EP04405167A 2003-04-16 2004-03-18 Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange Expired - Lifetime EP1468744B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04405167A EP1468744B1 (fr) 2003-04-16 2004-03-18 Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405275 2003-04-16
EP03405275 2003-04-16
EP04405167A EP1468744B1 (fr) 2003-04-16 2004-03-18 Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange

Publications (2)

Publication Number Publication Date
EP1468744A1 EP1468744A1 (fr) 2004-10-20
EP1468744B1 true EP1468744B1 (fr) 2008-06-04

Family

ID=33155289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405167A Expired - Lifetime EP1468744B1 (fr) 2003-04-16 2004-03-18 Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange

Country Status (5)

Country Link
US (1) US7032759B2 (fr)
EP (1) EP1468744B1 (fr)
JP (1) JP4628694B2 (fr)
AT (1) ATE397496T1 (fr)
DE (1) DE502004007309D1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7815072B2 (en) 2004-05-06 2010-10-19 Diversey, Inc. Metering and dispensing closure
US7950550B2 (en) 2004-05-06 2011-05-31 Diversey, Inc. Metering and dispensing closure
DE602005010362D1 (de) * 2004-11-02 2008-11-27 Shinetsu Chemical Co Verfahren zur Abtrennung wasserlöslicher Celluloseether
DE102005028832A1 (de) * 2005-06-15 2006-12-28 Fima Maschinenbau Gmbh Zentrifugenvorrichtung mit verbesserter Prozessanalysetechnologie
CN102671777B (zh) * 2012-04-11 2013-09-25 浙江轻机实业有限公司 双级活塞推料离心机间歇进料结构
RU2646928C2 (ru) * 2013-12-18 2018-03-12 Эф-Эл-Смидт А/С Распределитель для шнекового фильтрующего центробежного сепаратора
EP2913112B1 (fr) * 2014-02-26 2020-06-17 Ferrum AG Centrifugeuse et procédé de chargement d'une centrifugeuse
JP2015202448A (ja) * 2014-04-14 2015-11-16 中部クリーン株式会社 固液分離装置
EP2946835A1 (fr) 2014-05-22 2015-11-25 Ferrum AG Centrifugeuse, ainsi que dispositif de pré-accélération pour une centrifugeuse
CN104668112B (zh) * 2015-02-06 2017-12-08 江苏牡丹离心机制造有限公司 下卸料离心机中的布料装置
SE543603C2 (sv) * 2019-08-09 2021-04-13 556958 7768 Thordab Industri Innovation Ab Filtreringsanordning innefattande minst en roterande filterenhet
KR102504657B1 (ko) * 2019-11-18 2023-02-27 주식회사 엘지화학 가압 원심 탈수기
KR102504659B1 (ko) * 2019-11-18 2023-02-27 주식회사 엘지화학 가압 원심 탈수기
CN112317143A (zh) * 2020-09-27 2021-02-05 濮阳天健生物科技有限公司 一种合成5-甲基四唑用过滤离心分离器
IT202100000035A1 (it) * 2021-01-04 2022-07-04 Schlumberger Technology Corp Centrifughe decanter e condotti di accelerazione e procedimenti associati
CN114733249B (zh) * 2022-06-14 2022-09-09 山西省科技情报与战略研究中心 固液分离处理系统
CN116351141B (zh) * 2023-05-24 2023-08-11 汕头市精工东捷制版有限公司 激光喷淋腐蚀液过滤装置及其在版辊铜层处理中的应用

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1065333B (de) * 1959-09-10 Gebr. Heine, Viersen (RhId.) Kontinuierlich arbeitende Siebzentrifuge mit einem gegenüber der Siebtrommel vor- oder nacheilend umlaufenden Boden
DE689951C (de) * 1937-12-11 1940-04-11 E H Gustav Ter Meer Dr Ing Dr Einlaufvorrichtung fuer eine Schleuder mit Schubboden
BE537269A (fr) * 1953-05-25
DE1079551B (de) * 1956-03-31 1960-04-07 Krauss Maffei Ag Schubzentrifuge mit einem scheibenfoermigen Schubboden und einem das Schleudergut auf dem Trommelmantel verteilenden Einlauftrichter
US3395807A (en) * 1967-05-04 1968-08-06 Baker Perkins Inc Centrifuging machine
US3463316A (en) * 1968-06-19 1969-08-26 Baker Perkins Inc Centrifugal separating system
DE2165719A1 (de) * 1971-12-30 1973-07-05 Krauss Maffei Ag Zentrifuge
FR2334420A1 (fr) * 1975-12-12 1977-07-08 Dietrich & Cie De Essoreuse a poussee axiale
JPS6031548B2 (ja) * 1981-05-15 1985-07-23 富士電機株式会社 遠心脱水装置
DE4010748A1 (de) * 1989-04-13 1990-10-25 Stahl Werner Verfahren zum betrieb einer schubzentrifuge
CH679016A5 (fr) * 1989-09-29 1991-12-13 Escher Wyss Ag
JPH07860A (ja) * 1993-06-17 1995-01-06 Kooriyama Narasaki Seisakusho:Kk 連続固液分離方法、及びこれを用いた連続固液分離装置
US6109452A (en) * 1998-06-04 2000-08-29 Baker Hughes Incorporated Centrifuge with partial wear resistant basket
DE10148774B4 (de) * 2001-10-02 2005-08-11 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge mit Druckgehäuse
ES2608852T3 (es) * 2003-04-16 2017-04-17 Ferrum Ag Centrífuga de empuje de varias fases
US20040206686A1 (en) * 2003-04-16 2004-10-21 Ferrum Ag Pusher centrifuge

Also Published As

Publication number Publication date
JP4628694B2 (ja) 2011-02-09
ATE397496T1 (de) 2008-06-15
US7032759B2 (en) 2006-04-25
EP1468744A1 (fr) 2004-10-20
US20040206688A1 (en) 2004-10-21
JP2004351412A (ja) 2004-12-16
DE502004007309D1 (de) 2008-07-17

Similar Documents

Publication Publication Date Title
EP1468744B1 (fr) Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange
EP0719585B1 (fr) Broyeur agitateur avec séparateur pour la rétention de perles de broyage
DE4013388A1 (de) Zentrifugen-trockner
DE2063516B2 (de) Trommelsiebvorrichtung fuer faserstoffsuspensionen
CH622341A5 (fr)
EP2913112B1 (fr) Centrifugeuse et procédé de chargement d'une centrifugeuse
DE3301099C2 (fr)
EP0638365A2 (fr) Procédé et dispositif pour séparer des matières solides à grains fins en deux fractions granulométriques
EP1958698B1 (fr) Procédé de fonctionnement d'une centrifugeuse
EP1280606A1 (fr) Centrifugeuse a bol plein pour la separation de melanges de substances liquides et solides
EP1468742B1 (fr) Centrifugeuse à poussoir avec plusieur étages
EP0421188B1 (fr) Centrifugeuse à poussoir
EP0331924B1 (fr) Centrifugeuse à poussoir
EP0163112B1 (fr) Procédé et dispositif pour la séparation centrifuge de mélanges de minéraux à grains fins
EP1468743A1 (fr) Centrifugeuse-pousseuse
WO2000007731A1 (fr) Procede et dispositif pour le broyage a l'etat mouille de solides dans des liquides
EP2959977B1 (fr) Centrifugeuse à poussoir double ainsi que système de plancher coulissant
DE2407833A1 (de) Schub- schaelschleuder zur abtrennung von feststoffen aus suspensionen
EP1468741A1 (fr) Centrifugeuse à poussoir à double action
DE2739063A1 (de) Verfahren und vorrichtung zum zentrifugieren
EP1787723B1 (fr) Cartouche centrifuge
DE3220247A1 (de) Vorrichtung zur vorbehandlung des beschickungsgutes in schubzentrifugen
EP2946835A1 (fr) Centrifugeuse, ainsi que dispositif de pré-accélération pour une centrifugeuse
DE872304C (de) Verfahren und Vorrichtung zum Sichten von pulverfoermigem Material
DE2742422C2 (de) Kontinuierlich arbeitende Zentrifuge

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20050323

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20060710

17Q First examination report despatched

Effective date: 20060710

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 502004007309

Country of ref document: DE

Date of ref document: 20080717

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080915

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080904

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081104

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080904

26N No opposition filed

Effective date: 20090305

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

BERE Be: lapsed

Owner name: FERRUM A.G.

Effective date: 20090331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090318

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20091130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090318

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080905

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090318

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080604

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20180321

Year of fee payment: 15

Ref country code: DE

Payment date: 20180322

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004007309

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190331

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190331

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191001