EP0266669B1 - Hydrocyclones, en particulier parties de hydrocyclones et méthodes pour leur fabrication - Google Patents

Hydrocyclones, en particulier parties de hydrocyclones et méthodes pour leur fabrication Download PDF

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Publication number
EP0266669B1
EP0266669B1 EP87115828A EP87115828A EP0266669B1 EP 0266669 B1 EP0266669 B1 EP 0266669B1 EP 87115828 A EP87115828 A EP 87115828A EP 87115828 A EP87115828 A EP 87115828A EP 0266669 B1 EP0266669 B1 EP 0266669B1
Authority
EP
European Patent Office
Prior art keywords
hydrocyclone
layer
outer layer
inner layer
polyurethane
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
EP87115828A
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German (de)
English (en)
Other versions
EP0266669A1 (fr
Inventor
Friedrich Dipl.-Ing. Donhauser
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.)
AKW Apparate und Verfahren GmbH
Original Assignee
AKW Apparate und Verfahren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AKW Apparate und Verfahren GmbH filed Critical AKW Apparate und Verfahren GmbH
Priority to AT87115828T priority Critical patent/ATE55071T1/de
Publication of EP0266669A1 publication Critical patent/EP0266669A1/fr
Application granted granted Critical
Publication of EP0266669B1 publication Critical patent/EP0266669B1/fr
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
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/085—Vortex chamber constructions with wear-resisting arrangements

Definitions

  • the invention first relates to a hydrocyclone or hydrocyclone parts, consisting of a hard, load-bearing outer layer made of plastic and a softer inner layer made of plastic.
  • a hydrocyclone is known from FIG. 6 of US Pat. No. 4,053,393.
  • this does not meet the requirements for the load-bearing capacity and stability of the outer layer and the wear resistance of the inner layer, which are required or sought in practical operation.
  • From US-A 3 800 946 hydrocyclones are known, which consist in one piece of abrasion-resistant polyurethane. This differs in principle from the two-layer structure of a hydrocyclone from an outer layer and an inner layer according to the preamble of claim 1.
  • DE-A 2 361 556 shows a hydrocyclone consisting of a cylindrical container which tapers conically downwards. Both the cylindrical and the conically tapering container consist of two plastic layers.
  • the outer, load-bearing layer should be made of a stable plastic, in particular a glass fiber reinforced synthetic resin, while the inner layer should consist of a thermoplastic.
  • the plastic provided for the inner layer wears out relatively quickly. As soon as this is only partially done, the outer layer, namely the glass fiber reinforced synthetic resin, is destroyed in a very short time. This, in turn, causes the suspension to exit the relevant portion of the hydrocyclone, i.e. the hydrocyclone is no longer usable.
  • Hydrocyclones or hydrocyclone parts are also known in which the outer layer consists of a steel shell and the inner layer consists of a relatively soft polyurethane. This is disadvantageous in several ways. Such a steel shell or layer is quite expensive to manufacture. The steel shell is very heavy, which increases the total weight of the hydrocyclones accordingly. However, such a weight hinders assembly and any repairs in which the hydrocyclone or its parts have to be replaced. A heavy hydrocyclone requires more stable or stronger foundations. In the case of transport, the transport costs are correspondingly higher.
  • the outer steel layer or shell will be removed very quickly by the constituents of the suspension to be processed in the hydrocyclone, since steel has a relatively low wear resistance against any abrasion caused thereby.
  • the object of the invention is to improve a hydrocyclone or hydrocyclone parts according to the preamble of claim 1 in such a way that the load-bearing and abrasion resistance of such a hydrocyclone is increased, its manufacturing costs should be low and furthermore for the respectively desired connection the outer layer and the inner layer is taken care of.
  • the outer layer consists of a relatively hard polyurethane and the inner layer consists of a softer, more wear-resistant polyurethane, and that the outer layer and the inner layer at their common transition or The contact surfaces are in a casting compound.
  • An outer layer made of a relatively hard polyurethane has much better wearing properties than an outer layer made of a plastic according to the prior art. Such polyurethanes are so strong that they do not deform under the internal pressure of the hydrocyclone.
  • the disadvantages of the outer layer made of steel according to the further explained prior art are also avoided.
  • the abrasion-resistant inner layer made of polyurethane is much more resistant than the previously known plastic inner layers.
  • the outer layer of relatively hard polyurethane provided according to the invention has a considerably higher wear resistance than the known hydrocyclones. This extends the life of the hydrocyclone accordingly.
  • the casting composite provided according to this claim 1 between the outer layer and the inner layer has the effect that a bonding of both layers is achieved during the casting process.
  • Such a composite brings about an intimate adhesion between the inner layer and the outer layer, which is not given in the prior art explained. This results in greater stability of the hydrocyclone or hydrocyclone part and, in those cases in which part of the inner layer has already been worn out, there is still sufficient hold of the remaining part of the inner layer on the outer layer.
  • a preferred combined application of the features of claim 1 on the one hand and the features of claim 2 on the other hand is seen according to the invention in that in a hydrocyclone composed of several parts in its upper part, which has the suspension inlet and the overflow, a casting bond with one another between the outer layer and the inner layer is present, while in the remaining area of the hydrocyclone, in which the fractions are separated and the heavy or coarse fraction is discharged, a silicone separation layer is provided between the outer layer and the inner layer.
  • the remaining area of the hydrocyclone can also consist of a central part and a lower part.
  • claims 5 and 6 represent preferred hardness information of the polyurethanes used for the outer layer and the inner layer.
  • the invention is also intended to provide advantageous methods for producing such hydrocyclones or hydrocyclone parts.
  • the invention first provides that the outer load-bearing layer is first made and then the material of the inner, softer layer is poured into the outer layer and brought to hardening.
  • This has the advantage that the material of the inner layer does not have to be heat-treated twice. Repeated heat treatment could cause some of the polyurethanes to suffer from their wear resistance.
  • somewhat larger molding costs for the casting of the outer layer have to be accepted.
  • the inner, softer layer is first cast from a polyether polyurethane with a Shore hardness in the range around 80 Shore A, followed by heating (Tempering) this inner layer and then casting it with the outer layer made of the harder polyurethane.
  • the specified polyether polyurethane can withstand the second heat treatment in the form of annealing even without sacrificing wear resistance.
  • Such a polyether polyurethane is manufactured, for example, by the Dupont company. This is cheaper than the production of the hydrocyclones according to the above.
  • the hydrocyclone according to the invention basically consists of three parts, namely the lower part 1, the middle part 2 and the upper part 3.
  • the lower part 1 forms a discharge 4 for the heavy or coarse fraction.
  • the middle part 2 forms a region 5 in which the fine or light fraction of the suspension is separated from the coarse or heavy fraction essentially by the hydrocyclone effect.
  • the upper part 3 contains a suspension inlet 6 and an overflow 10 of the fine or lighter fraction.
  • the parts insofar as they have a load-bearing function, consist of a consistently numbered outer layer of 7 made of a relatively hard polyurethane, which can thus take over the load-bearing function, and a softer, very wear-resistant inner layer 8 of a correspondingly softer polyurethane.
  • the Shore hardness of the outer layer 7 is in the range from 95 to 105 Shore, while the Shore hardness of the inner layers 8 is preferably 75 to 85 Shore A.
  • the layers 7, 8 are preferably connected to one another at their contact surface 9 by a casting compound and held together. However, it can also be carried out in such a way that after casting one of these two layers, a thin silicone layer 11 is applied, preferably sprayed, on which surface intended for contact with the counter surface of the second layer. After appropriate wear, the inner layer can thus be easily detached from the outer layer and replaced by another inner layer. In the present exemplary embodiment, it is advisable to hold the outer and inner layers firmly together in the upper part 3 by means of a casting compound, whereas in the middle part 2 and lower part 1 the aforementioned silicone layer is to be provided between the outer and inner layer, since the greatest wear is to be expected there. This silicone layer is only indicated in the drawing by the number 11 and the associated dividing line between the inner and outer layers of the hydrocyclone parts 2 and 1.
  • a polyurethane must be selected for the inner layer that can withstand the two heat treatments without loss of wear resistance.
  • a polyether polyurethane with a Shore hardness in the range of 80 Shore A is provided.
  • the invention is explained above using the exemplary embodiment of a hydrocyclone, which is composed of several parts. As already mentioned at the beginning, the invention also relates to such a design, i.e. one-piece hydrocyclone. In the latter case, the above-mentioned casting compound is recommended.

Landscapes

  • Laminated Bodies (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (8)

1. Hydrocyclone ou, respectivement, parties d'hydrocyclone constitué(es) par une couche extérieure porteuse dure en matière plastique et par une couche intérieure en une matière plastique moins dure que celle-ci, caractérisé(es) par le fait que la couche extérieure (7) est composée de polyuréthane plus résistant à l'usure et moins dur que celui-ci, et par le fait que la couche extérieure (7) et la couche intérieure (8) sont reliées entre elles par une liaison par coulée sur leurs surfaces communes (9) de jonction ou, respectivement, de contact.
2. Hydrocyclone ou, respectivement, parties d'hydrocyclone constitué(es) par une couche extérieure porteuse dure en matière plastique et par une couche intérieure en une matière plastique moins dure que celle-ci, caractérisé(es) par le fait que la couche extérieure (7) est composée de polyuréthane relativement dure et la couche intérieure (8) d'un polyuréthane plus résistant à l'usure et moins dur que celui-ci, et par le fait qu'une couche de séparation en silicone (11) est prévue entre la couche extérieure (7) et la couche intérieure (8).
3. Hydrocyclone composé de parties d'hydrocyclone selon les revendications 1 et 2, caractérisé par le fait qu'il existe une liaison mutuelle par coulée entre la couche extérieure (7) et la couche intérieure (8) dans sa région supérieure (3) qui comporte l'entrée de la suspension (6) et le trop-plein (10), cependant qu'il est prévu une couche de séparation en silicone (11) entre la couche extérieure (7) et la couche intérieure (8) dans la région restante de l'hydrocyclone dans laquelle a lieu la séparation des fractions et l'extraction de la fraction lourde ou, respectivement, grossière.
4. Hydrocyclone selon la revendication 3, caractérisé par le fait que la région restante de l'hydrocyclone est composée d'une partie centrale (2) et d'une partie inférieure (1).
5. Hydrocyclone ou, respectivement, parties d'hydrocyclone selon l'une des revendications 1 à 4, caractérisé(es) par le fait que la dureté Shore de la couche extérieure est de 95 à 105 Shore A.
6. Hydrocyclone ou, respectivement, parties d'hydrocyclone selon l'une des revendications 1 à 5, caractérisé(es) par le fait que la dureté Shore de la couche intérieure est de 75 à 85 Shore A.
7. Procédé pour la fabrication d'un hydrocyclone ou, respectivement, de parties d'hydrocyclone selon l'une des revendications 1 à 6, caractérisé par le fait que l'on fabrique tout d'abord la couche porteuse extérieure (7), que l'on coule ensuite dans la couche extérieure la matière de la couche intérieure moins dure (8), et que l'on amène celle-ci à durcir.
8. Procédé pour la fabrication d'un hydrocyclone ou, respectivement, de parties d'hydrocyclone selon l'une des revendications 1 à 6, caractérisé par le fait que l'on coule tout d'abord la couche intérieure moins dure (8) à partir d'un polyéther-polyuréthane dont la dureté Shore est aux environs de 80 Shore A, et qu'a lieu ensuite un chauffage (recuit) de cette couche intérieure, puis que l'on entoure celle-ci par coulée de la couche extérieure de polyuréthane plus dur.
EP87115828A 1986-10-29 1987-10-28 Hydrocyclones, en particulier parties de hydrocyclones et méthodes pour leur fabrication Expired - Lifetime EP0266669B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87115828T ATE55071T1 (de) 1986-10-29 1987-10-28 Hydrozyklon, bzw. hydrozyklonteile, sowie verfahren zu deren herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3636734 1986-10-29
DE3636734 1986-10-29

Publications (2)

Publication Number Publication Date
EP0266669A1 EP0266669A1 (fr) 1988-05-11
EP0266669B1 true EP0266669B1 (fr) 1990-08-01

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EP87115828A Expired - Lifetime EP0266669B1 (fr) 1986-10-29 1987-10-28 Hydrocyclones, en particulier parties de hydrocyclones et méthodes pour leur fabrication

Country Status (4)

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EP (1) EP0266669B1 (fr)
AT (1) ATE55071T1 (fr)
DE (2) DE3764065D1 (fr)
ES (1) ES2016960B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2645503C1 (ru) * 2016-12-01 2018-02-21 Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук" (ФИЦ КНЦ СО РАН, КНЦ СО РАН) Резинополимерный материал для внутренней футеровки гидроциклонов

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
US5525385A (en) * 1992-11-20 1996-06-11 Lanxide Technology Company, Lp Macrocomposite bodies and methods for making the same
DE19502202A1 (de) * 1995-01-25 1996-08-22 Ernst August Bielefeldt Verfahren und Einrichtung zur Stofftrennung mittels Fliehkraft
DE29501148U1 (de) * 1995-01-25 1995-07-20 Bielefeldt Ernst August Einrichtung zur Stofftrennung mittels Fliehkraft
DE10235743A1 (de) * 2002-08-05 2004-02-19 Mann + Hummel Gmbh Zyklonabscheider
DE102010063196A1 (de) * 2010-12-16 2012-06-21 Voith Patent Gmbh Hydrozyklon
CN103949356A (zh) * 2014-05-19 2014-07-30 云南磷化集团有限公司 筒锥连体无溢流管水力旋流器
DE102016120078A1 (de) * 2016-10-21 2018-04-26 Gema Switzerland Gmbh Zyklonabscheider

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DE1704381A1 (de) * 1968-02-28 1971-06-16 Thermovox Gmbh Rotationsgussverfahren und Vorrichtung zum Herstellen von Hohlkoerpern und offenen Formteilen aus Kunststoffen,und auf diese Weise hergestellte Behaelter und Formteile
DE2361556A1 (de) * 1973-12-11 1975-06-12 Kerren Kunststofftechnik Hydrozyklon
US3988239A (en) * 1974-08-19 1976-10-26 Picenco International, Inc. Cyclone and line
US4053393A (en) * 1975-11-19 1977-10-11 Picenco International, Inc. Cyclone assembly
DE3240723C2 (de) * 1982-11-04 1985-11-28 Elteka Kunststoff-Technik Gmbh, 7950 Biberach Hydrozyklon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2645503C1 (ru) * 2016-12-01 2018-02-21 Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук" (ФИЦ КНЦ СО РАН, КНЦ СО РАН) Резинополимерный материал для внутренней футеровки гидроциклонов

Also Published As

Publication number Publication date
EP0266669A1 (fr) 1988-05-11
DE8717727U1 (fr) 1990-02-15
ATE55071T1 (de) 1990-08-15
DE3764065D1 (de) 1990-09-06
ES2016960B3 (es) 1990-12-16

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