Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
  • B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length

Definitions

• the invention relates to a device of the type mentioned in the preamble of claim 1.
• Such a device is known from DE-PS 39 02 957.
• the flowable material is fed to the press nip between a rotating hollow roller with internal toothing and an externally toothed squeezing roller which meshes with this internal toothing.
• From the respective tooth bottoms of the internal toothing of the hollow roller extend to the outside of the holes through which the material is pressed when it engages with the squeezing roller and is deposited in the form of pastilles or granules on a cooling surface.
• the cooling surface is formed by a circumferential cooling belt, which moves past the lower region of the hollow roller.
• the part of this hollow roller lying above a horizontal central plane of the hollow roller is covered by a heating jacket which enables the temperature of the hollow roller to be influenced.
• the invention has for its object to provide a device of the type mentioned, with a simple structure, a reliable collection of the in the processing of Exhaust gases generated materials.
• the exhaust gases are sucked off directly in the area in which they are created, namely in the area in which the material emerges from the holes in the hollow roller and is deposited on the cooling surface.
• the fact that the exhaust duct is partially limited by the outer surface of the existing heating jacket results in a simple structure, the further, the other limitation of the exhaust duct forming jacket, which is arranged on the outside of the heating jacket, at the same time the otherwise necessary insulation of the Outside of the heating jacket results and in turn can be insulated.
• the exhaust duct is also heated by the outside of the heating jacket, condensation of the gases collected in this area is reliably avoided and the exhaust gases pass through the exhaust duct to an exhaust port from which the exhaust gases can be supplied with solvent recovery and / or filter devices .
• this exhaust shaft which is preferably closed on the end faces of the hollow roller, can be closed at its rear end in the direction of rotation of the hollow roller, which is opposite the suction end for the exhaust gases, by an adjustable flap, which Control of the ambient air sucked in at this rear end enables.
• This flap is preferably articulated on the further jacket, so that in the partially open state, part of the exhaust gases can also be sucked out, possibly from the outer circumference Hollow roller adhesive material emerges.
• the heating jacket and / or the further jacket preferably extend concentrically to the area of the hollow roller above the horizontal central plane, while the suction end lying below this central plane adjoins the area of the cooling surface on which the pastilles or granules are deposited this cooling surface is directed and possibly expanded to improve the suction effect for the exhaust gases.
• This suction end can extend as far as possible in the vicinity of the cooling surface.
• FIG. 2 is a broken away sectional view along the line II-II of FIG. 1.
• Fig. 1 a cross-sectional view of an embodiment of the device is shown in a simplified manner, wherein the basic device corresponds for example to that which is explained in detail in DE-PS 39 02 957.
• This device has a hollow roller 1, which is provided on its inner surface with an internal toothing which interacts with the outer toothing of a squeezing roller, not shown, which is preferably arranged in the lower region in the hollow roller.
• Material introduced into the press nip between the squeezing roller and the internal toothing of the hollow roller 1 is pressed out through bores which extend from the tooth bottoms of the internal toothing of the hollow roller 1 to the outside thereof, so that this material in the form of pastilles or granules 2 on a cooling surface, preferably a rotating one Cooling belt 8 is stored.
• a part of the circumference of the hollow roller 1 is provided for controlling the temperature of this hollow roller with a heating jacket 3 which is arranged at a radial distance from the hollow roller 1 and which in most cases is concentric over the area of the hollow roller above a horizontal central plane 12 extends to this.
• this heating jacket 3 is surrounded at a distance by a further jacket 5, which preferably has an insulating layer 9 on its outside.
• the further jacket 5 thus forms an insulation for the outside of the heating jacket 3, so that its heat losses are reduced.
• Outer jacket 5 forms an exhaust duct 4, which is connected to an exhaust nozzle 6.
• Pastilles lie on the cooling surface 8, directed essentially at this cooling surface 8 (below the mentioned central plane 12), wherein this suction end can optionally be expanded in a funnel shape.
• exhaust gases emerge from the pastilles or granules, which should be extracted as quickly as possible in order to prevent these exhaust gases from entering the ambient air.
• these exhaust gases emerge from the granules or lozenges 2 only over a limited distance during the further movement of the cooling belt 8 forming the cooling surface, so that the exhaust duct 4 formed between the heating jacket and the further jacket 5 can effectively suck off these exhaust gases.
• an adjustable flap 7 can be arranged, which is preferably articulated on the further jacket 5, so that when this flap 7 is partially opened, a gap is formed between this flap and the heating jacket, through which, in addition to the ambient air, exhaust gases are also sucked in, which escape from the material, which may still be on the outer surface of the hollow roller 1 during its movement from the cooling belt 8 adheres and is optionally stripped from this outer surface with the aid of a stripping plate 10.
• the exhaust gas sucked out of the exhaust duct 4 via the suction nozzle 6 can be fed to a cleaning device for the exhaust gas, for example a condensation or filter device, so that the exhaust gases which arise when the material is fed onto the cooling belt 8 can be effectively rendered harmless.
• a cleaning device for the exhaust gas for example a condensation or filter device
• the end faces of the exhaust duct 4 formed by the heating jacket 3 and the further jacket 5 can either be completely or partially closed in order to control optimal extraction of the exhaust gases generated during operation of the device.
• the device according to the invention makes it possible in a simple manner, by simply adding a further jacket, to effectively extract the exhaust gases arising during the product application directly at their point of origin, without the need for complex extraction devices.
• a condensation of these exhaust gases in the exhaust duct is reliably prevented by the arrangement of the suction duct between the heating jacket and the further jacket and possibly by the insulation of the outside of the further jacket.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)
• Medicinal Preparation (AREA)
• Processing Of Solid Wastes (AREA)
• Glanulating (AREA)
• Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
• Press Drives And Press Lines (AREA)
• Preparing Plates And Mask In Photomechanical Process (AREA)
• Developing Agents For Electrophotography (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6405189

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (9)

Citations (2)

Family Cites Families (9)

• 1990
  • 1990-04-26 DE DE4013405A patent/DE4013405C2/de not_active Expired - Fee Related
• 1991
  • 1991-04-22 CA CA002081110A patent/CA2081110C/en not_active Expired - Fee Related
  • 1991-04-22 WO PCT/EP1991/000771 patent/WO1991016151A1/de not_active Ceased
  • 1991-04-22 EP EP91908746A patent/EP0526549B2/de not_active Expired - Lifetime
  • 1991-04-22 DE DE59102275T patent/DE59102275D1/de not_active Expired - Fee Related
  • 1991-04-22 AT AT91908746T patent/ATE108707T1/de not_active IP Right Cessation
  • 1991-04-22 JP JP91508145A patent/JPH05507860A/ja active Pending
  • 1991-04-22 ES ES91908746T patent/ES2056649T5/es not_active Expired - Lifetime
  • 1991-04-22 US US07/940,956 patent/US5378132A/en not_active Expired - Fee Related

Patent Citations (2)

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