Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
  • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
  • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
  • B04B2001/2066—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with additional disc stacks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
  • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
  • B04B2001/2083—Configuration of liquid outlets

Definitions

• the invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.
• US Pat. No. 5,310,399 shows plates which are arranged on the screw body, namely between several screw flights of the screw.
• the concentrate is drained off on a larger diameter of the nozzles and the clarified phase in the center.
• a solid space is formed outside the plate pack, which is conical on both sides
• the outer diameter of this separator is, for example, in the SU 385 629 on a larger radius than the outer diameter of the decanter.
• the invention has the task of attaching the plate packs to the
• the plate pack is arranged in a cylindrical portion of the drum space with a substantially constant diameter and the plate pack is directly connected upstream of the liquid drain, whereby it rests on the drum cover and / or is arranged on it ,
• the plate pack Since the plate pack lies directly on the drum cover or is attached to it, it no longer rotates at a differential speed to the drum casing, but rotates with it.
• this plate insert connected to the liquid-side drum wall has no troublesome short-circuit connections between the Klaasensammelletechnisch of the plate insert and the solid space outside the plate insert.
• the concentrate compartment of the plate insert is located on the outside of the plate package, in which the diameter of the drum casing can be carried out continuously and does not require any expansion. In this way, mixtures that are difficult to clarify can also be separated, e.g. Mix with fine suspended matter.
• the drum cover is essentially conical, which makes it particularly easy to attach the preferably pre-assembled plate packs.
• Ketvenez allows on the drum cover, especially since the plates of the plate pack are also preferably conical.
• the clear phase collecting line is at a lower level
• a plate is provided which has a disk-like inner section and a conical outer section, the maximum radial extent of the plate being less than the radial extent of the snail blade.
• the conical section of the plate and the conical drum cover formed opposite to the conical section of the plate hereby form a double-conically tapering solid or concentrate collecting space, which is a particularly advantageous one
• the concentrate can be drained off to the drum casing, in particular by means of a scraper on the first screw blade which penetrates the plate.
• FIG. 1 shows a section through a solid-bowl screw centrifuge according to the invention.
• FIG. 2 shows a section through a partial area of the solid bowl screw centrifuge according to the invention.
• FIG. 1 shows a solid bowl screw centrifuge which, in addition to the components not to be explained further here, such as drive A and the machine frame
• M has a centrifugal drum with a drum casing 1 and with a screw 2, the screw 2 comprising a screw body 3 and a screw blade 4 surrounding the screw body 3 several times. Between Screw flights 4 is a conveyor track for conveying / transporting a centrifugal material to be processed.
• the screw body 3 has a slightly stepped cylindrical section 5a in the rear region and a conically tapering section 5b adjoining it.
• the cylindrical section 5 a is axially closed by a drum cover 7 which is conical at least in the area of the drum space 6 between the screw body 3 and the drum shell 1.
• the centrifuged material S is passed through the centrally arranged and rotating inlet pipe 12 via a distributor 20 into the drum space 6 with the screw 2 and the drum casing 1 surrounding the screw 2. Due to the action of gravity, the solid particles settle on the inner one in a very short time
• the distributor 20 and the co-rotating inlet pipe 12 form an advantageously hygienic, largely sealed system.
• the screw 2 rotates at a slightly lower or greater speed than the drum 1 and conveys the ejected solid to the conical section from the drum to the solid discharge.
• the liquid flows to the cylindrical section 5a at the rear end of the drum 1 and is discharged there.
• Snail body arranged, which has a disc-like inner section 8a and preferably a stabilizing, conical outer section 8b, the maximum radial extent of the plate 8 is less than the radial Extension of the screw blade 4.
• At least one opening for a liquid passage is formed on the inside diameter of the disk 8, here an annular gap 21.
• the conical plates 11 are essentially designed to correspond to the conicity of the drum cover 7.
• a plate pack 9 is arranged, which is designed as a preassembled unit and is attached directly to the inside of the drum cover 7.
• the plate pack has a “distributor-shaped” holder 10, which comprises an inner cylindrical section 10a and an axially adjoining conical section 10b.
• the actual conical plates 11 are arranged between the conical section 10b and the drum cover 7, which are preferably spaced apart by means of spacers which are adapted to the respective application (molded strips, punctiform spacers, etc.).
• Rising channels 13 are formed in the outer area of the plates 1 and also pass through the conical section 10b.
• the plate pack 9 can be designed such that the centrifugal material to be clarified is supplied radially from the outside (not shown here).
• the clear phase is derived through a manifold 14 on the inner diameter of the plate 11 in the wall of the cylindrical section 10b.
• the manifold 14 is preferably at least partially on a smaller diameter than the outer wall of the screw body 3, which requires a more energy-efficient operation than arranging the manifold on a larger diameter, which is also conceivable in theory.
• the manifold 14 is axially continued in a bore 15 of the drum cover, which opens into a radially outwardly extending outlet 16 for the clear phase.
• the concentrate chamber is located here on the outside of the plate pact 9, the diameter of the drum casing 1 being continuous and does not include any expansion.
• the concentrate is removed by means of the screw 2, the screw for discharging the solid from the concentrate space has a clearing attachment 17 which passes through the plate 8.
• the diameter of the drum casing 1 is essentially constant in this area.
• ribs 23 are also advantageously formed on the side facing away from the plates 9 to support the introduction of the centrifuged material into the plate pack.
• the centrifugal material passing through the annular gap 21 flows at the ribs 23 into the rising channels 13 of the plate pack 9, where the clear phase to the collecting line and the solids are discharged to the outside.
• the solids are carried along by the broach 17 and conveyed by the screw to the conical section 5b.
• the system or the plate pack can be cleaned by a backwashing device. If necessary, the cleaning effect can be supported by emptying via a nozzle in the outlet 16 and a centrifugal valve 19.
• the distance between the plates 11 of the plate package 9 is preferably greater than 0.5 mm and less than 3 mm; measured perpendicular to the surface of the plate.
• the angle of inclination of the conical plates to the drum axis is preferably between 35 ° and 55 °, in particular 40 ° to 50 °.
• the diameter of the plates 11 on the outer edge is particularly preferably approximately 50 to 75%, in particular 2/3 of the diameter of the free screw region or the drum space.

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• Centrifugal Separators (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7669017

Family Applications (1)

Country Status (11)

Families Citing this family (18)

Family Cites Families (34)

• 2000
  • 2000-12-27 DE DE10065060A patent/DE10065060B4/de not_active Expired - Fee Related
• 2001
  • 2001-10-23 EP EP01271978A patent/EP1345700B1/fr not_active Expired - Lifetime
  • 2001-10-23 CA CA002437502A patent/CA2437502C/fr not_active Expired - Fee Related
  • 2001-10-23 BR BRPI0116542-9A patent/BR0116542B1/pt not_active IP Right Cessation
  • 2001-10-23 DE DE50105394T patent/DE50105394D1/de not_active Expired - Lifetime
  • 2001-10-23 AT AT01271978T patent/ATE289221T1/de not_active IP Right Cessation
  • 2001-10-23 AU AU2002221724A patent/AU2002221724B2/en not_active Ceased
  • 2001-10-23 PL PL362216A patent/PL197427B1/pl unknown
  • 2001-10-23 JP JP2002552684A patent/JP3990982B2/ja not_active Expired - Fee Related
  • 2001-10-23 DK DK01271978T patent/DK1345700T3/da active
  • 2001-10-23 WO PCT/EP2001/012196 patent/WO2002051550A1/fr active IP Right Grant
  • 2001-10-23 US US10/451,949 patent/US7083565B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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