Disc granulator with activator

 

The invention relates to devices for granulating materials and can be used in food, pharmaceutical and other industries, for example, to obtain concentrates of jellies, consisting of a mixture of sugar, starch and concentrated juice. Disc granulator includes a housing with a cover, which is installed with the possibility of rotation of the inclined plate, drive plate, loading and unloading spouts, nozzles, wall and bottom knives. In the cover perpendicular to the bottom of the plate is installed activator with the drive. The activator is placed with a gap of 5-10 mm relative to the bottom and sides of the plate in the area between 3-5 hours under the condition of rotation of the plate counterclockwise. The ratio of the diameter of the working body of the activator to the diameter of the plate is 1:12 to 1:8. The invention allows to reduce the time of granulation, to increase the output of the pellet fractions of 0.75-2.5 mm, uniform density. 3 Il.

The invention relates to devices for granulating materials and can be used in food, pharmaceutical and other industries, for example, to obtain concentrates of jellies, consisting of a mixture of sugar, starch and concentrated juice.

Nano-gravitational forces on an inclined rotating plate. On the material placed on the rotary plate, act the force of gravity, centrifugal force, friction force, capillary force. Under the action of these forces the material rises to the top of the plate and rolls in its lower part. When this occurs, the education, the growth of the granules, and the form of movement of the material approaches the spiral. The greatest length of the spiral are the smallest particles, the smallest length of the spiral are the largest granules. The mass of the rotating material layer are unevenly distributed over the surface of the bottom of the plate and offset to the side of the plate, moving up. Thus, in a rotating layer has a notional center segregation of granules, near which focus the largest granules.

The growth rate of the granules in the disc granulators essentially depends on the bulk density of the granulated material, the quality and uniformity of the granules depends on the ability of a material to plastic deformation in the process of okutyvaya.

Food dispersed mixture, as a rule, are characterized by low bulk weight and increased stickiness that leads either to an extended time of granulation, or, conversely, to the rapid adhesion of the mixture in a large shapeless lump is density, and the liquid phase is a viscous syrupy concentrate. The use of the known disc granulator for granulating concentrate jelly leads to the formation of granules increased in size (>5 mm), uniform in quality (shape, density), further complicating the solubility of the concentrate jelly, creates difficulties for small packaging of the product affects the appearance, lengthens the drying of the granules concentrate pudding.

Known disc pelletizer, comprising a housing with a cover, which is installed with the possibility of rotation of the inclined plate, drive plate, loading and unloading spouts, nozzles and separating device.with. THE USSR 1517995, 01 J 2/14, 1987).

Separator specified disc granulator is made in the side of the plate with perforation and two arc plates covering the Board plate and forming the flow area in the zone 1-6 h when you rotate the plate counterclockwise, and installed so that they can move along the side of the plate. The formed pellets are crashing over the side of the plate only in the place where the arc plates form the flow area, and particles smaller than the diameter of the perforations pass through the Steen changing the position and size of the orifice discharge of the finished product, what enables some way to control the growth process of the granules and their ultimate size and allocate the product more narrow fractional composition.

However, the separation device allows the selection of granules narrow particle size distribution only with good flowability of the granules, as well as the removal of the fine fraction separating the device from the granulator reduces the specific yield.

Known plate granulator (EN 2105601 C1, 6 01 J 2/14, 1998), where the introduction of regulatory plates, table-knife and separating device creates an additional effect on granule for their active rolling and ensures the removal of granules of the desired size.

However, due to the increased stickiness of the food mass, in particular concentrates jelly, by a separating device will be a build-up of material and, as a consequence, the separation device will not ensure effective allocation of granules of the desired size.

The objective of this invention is to provide a disc granulator, which due to the introduction of a new structural element - activator reduces the time of granulation, increased release of granule fractions of 0.75-2 the local disc granulator, comprising a housing with a cover, which is installed with the possibility of rotation of the inclined plate, drive plate, the bumper and bottom knives, entered the activator with the drive. The activator is installed perpendicular to the bottom of the plate with a gap relative to the bottom and sides of plate 5-10 mm

The activator is placed in the area where the focus of the largest granules and coalescent units. Shock blade activator, on the one hand, leads to the destruction of large granules and aggregates, and on the other hand, initiates granulometrie in the source material. The ratio of the diameter of the working body of the activator to the diameter of the plate taken in the range of 1:12-1:8 (depending on the properties of the original material), because in this respect there is no violation of the regime of the roll of material and the associated process of segregation of granules. Drive rotation of the activator is made adjustable (frequency of rotation), which allows to actively influence the process of granulation, in particular on the size of the resulting granulate.

In Fig. 1 is a diagram of disc granulator with activator in section a-A. In Fig.2 and 3 are shown respectively a top view and in cross section a-a disc granulator with activator indicating conditional trajectories del 1 of diameter D, depth H, radius R and angle to the horizoncontained in a housing 2 with a lid 3, the drive plate 1, the discharge pipe 4 to output of finished products, the loading pipe 5 to enter retur nozzle 6, the bottom wall and the knives 7 and 8 activator 9, mounted at a distance relative to the bottom and side of plate 1, is equal to 5-10 mm, and the area between 3-5 hours when relative rotation of the plate counterclockwise, the shaft of the activator 10, the activator drive 11 and the bearing unit 12.

When conditional consideration of plate 1 in the form of hours (Fig.2) the trigger 9 is located in the area between 7-9 hours under the condition of rotation of the plate in the clockwise direction, and the area between 3-5 hours while rotating counterclockwise.

In Fig.2 and 3 was also observed trajectory: a trajectory (relative) motion of the source material; b, C, d, e - the trajectory of the pellets as they grow; e - trajectory of the largest granules, W - a capture zone of the activator.

Disc granulator operates as follows.

Inclined plate 1 mounted in a housing 2 with a lid 3, is driven by the actuator counterclockwise with a given angular velocity W.

Through the feeding pipe 5 is injected recur, for example, the mixture m is Asia the plate 1, gravity centorrino forces and friction forces they receive complex movement (schematic lines a, b, C, d, e) around the zone of movement of the largest granules located inside the zones bounded by a line that is

Actively rolling due to the natural shedding of the granules are coated in the liquid phase, for example, concentrated juice, through a nozzle 6. In addition, clinging to the bottom and side surfaces of the plate pellets difficultly enough cleaned off the bottom of the knife 7 and the wall with a knife 8, sliding respectively on the bottom and side surface of the plate towards her movement.

As the growth of large granules fall into the capture zone of the activator W, where exposed to the activator, which rotates with frequency n, then due to the centrifugal force of the pellets roll over the side of the plate in the discharge pipe 4 and are derived from the disc granulator for further processing.

Thus, the active mixing of the material activator increases the uniformity of the granules obtained from multicomponent mixtures, reduced the time of granulation, for example, concentrates jelly, consisting of a mixture of sugar, starch and fruit extract to the desired size is icnam plate granulator. The yield of granules of the required class increases to 85-90% vs. 60-65% in conventional plate granulator.

Claims

Disc granulator with activator, comprising a housing with a cover, which is installed with the possibility of rotation of the inclined plate, drive plate, loading and unloading spouts, nozzles, wall and bottom knives, characterized in that the cover perpendicular to the bottom of the plate is installed activator driven with a gap relative to the bottom and sides of plate 5-10 mm in the area between 3-5 hours under the condition of rotation of the plate counterclockwise, and the ratio of the diameter of the working body of the activator to the diameter of the plate is 1:12-1:8.

 

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