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
  • B04B11/02—Continuous feeding or discharging; Control arrangements therefor

Definitions

• the invention relates to a centrifuge with a self-emptying centrifugal drum, to which the product to be centrifuged is fed via an inlet line, at least one liquid phase being drained under pressure from the centrifugal drum via an outlet line and solids accumulating in the centrifugal drum being discharged in predeterminable time intervals .
• centrifuges are generally known. So-called partial evacuations can be carried out in order to expel the solids, in which only a small part of the waste contents is evacuated. This process leads to a sudden drop in pressure in the drum and thus also in the drain line. This can have a negative effect on the operation of downstream equipment.
• the object of the invention is to develop the known centrifuge in such a way that even when the centrifuge is partially emptied, there is no pressure drop in the discharge line.
• the drain line is provided with an elastic line part which is surrounded by a housing in an airtight manner, and the housing is connected to a pressure source via a line with a valve arranged therein.
• the valve Before a partial evacuation is triggered, the valve is first opened and the elastic line part is thereby subjected to pressure. If the pressure drop described occurs in the drainage line during the subsequent partial emptying, the elastic line part is compressed by the pressure applied from the outside and displaces part of the product volume present in it, which corresponds to the solid quantity expelled. The pressure drop is compensated for by this process.
• the elastic line part is provided in a bypass line.
• the line part intended for product discharge can then consist of solid material as usual.
• valves are arranged in the drain line and the bypass line in this way. arranges that the drain from the centrifuge can optionally be routed exclusively via one of the two lines. This arrangement offers particular advantages when it comes to cleaning the circuit of the lines.
• the centrifuge has a second drain line
• the valve is opened and product is briefly conveyed from the inlet into the second discharge line.
• Compressed air is preferably used as the pressure medium.
• the centrifuge to which the product to be centrifuged is fed via a feed line 2 is denoted by 1.
• the liquid phases separated from one another in the centrifuge are discharged via the discharge line 3 and the second discharge line 4.
• the drain line 3 is provided with a bypass line 5 in which there is an elastic Line part 6 is located, which is surrounded airtight by a housing 7 which is connected to a pressure source 10 via a line 8 with a valve 9 provided therein.
• a valve 11 is arranged in the drain line 3 and a valve 12 is arranged in the bypass line 5.
• the inlet line 2 is connected to the outlet line 4 via a second bypass line 13 in which a valve 14 is provided.
• the centrifuge When the centrifuge is charged with product via the inlet 2, the separated liquid phases are discharged under pressure via the outlet line 3 and the second outlet line 4.
• the optimum pressure in each case is set by devices not shown.
• the valve 9 Before the partial emptying, the valve 9 is first opened and thereby the housing 7 is pressurized and thus also the elastic line part 6 Product flows back into the drum. The amount flowing back is replaced by product which is located in the elastic conduit part 6, because this is compressed when the pressure begins to fall in the discharge conduit 3 due to the pressure difference that then arises.
• the valve 14 in the second bypass line 13 is also opened during the emptying process. Since the pressure drop caused by emptying is only present for approx. 1 second, the brief product inflow into the second discharge line 4 is tolerable in many cases. After completion of the emptying process, the bypass line is filled by 5 * a connecting line 15 again.
• bypass line 5 and the drain line 3 can be rinsed separately by appropriate switching of the valves 11 and 12 in order to improve the cleaning effect.

Landscapes

• Centrifugal Separators (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6400074

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (7)

Citations (3)

Family Cites Families (3)

• 1990
  • 1990-02-14 DE DE4004459A patent/DE4004459C2/de not_active Expired - Fee Related
• 1991
  • 1991-01-22 EP EP91902695A patent/EP0515396B1/de not_active Expired - Lifetime
  • 1991-01-22 WO PCT/EP1991/000114 patent/WO1991012081A1/de not_active Ceased
  • 1991-01-22 DK DK91902695.5T patent/DK0515396T3/da active
  • 1991-01-22 DE DE59101726T patent/DE59101726D1/de not_active Expired - Fee Related
  • 1991-01-22 US US07/920,491 patent/US5267937A/en not_active Expired - Fee Related
  • 1991-01-25 IE IE27391A patent/IE66728B1/en not_active IP Right Cessation

Patent Citations (3)

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