Hoop standard granulator uniform thickness material spreading device

Abstract

The invention discloses a material spreading device between a hoop standard granulator modulator and a material dropping hoop, the material spreading device comprises a material hopper component, an impeller, a supporting component and a scraper component; the material hopper component comprises an upper material hopper and a lower material hopper, the casing of the upper material hopper is hinged on the casing of a granulator, the lower material hopper is fixed on a press roller, an upper material hopper powder material channel is contact with the lower material hopper, a scraper is arranged on the material outlet side of the lower material hopper, the scraper height is controlled by a rope wheel type elevator, the impeller is arranged in the lower material hopper; powder is cached in the hopper, then is spread on the material dropping hoop via the impeller, the material dropping hoop brings the powder out, the powder thickness is limited by the scraper height; the device can realize thickness uniform stability of the powder on the material dropping hoop without being affected by material dropping condition of the modulator and the rotation speed of the material dropping hoop, the thickness of the powder can be adjusted, hoop standard granulator blocking failure can be prevented, hoop standard granulator vibration can be reduced, different length phenomenon of extrusion particles can be solved, and granulating quality and working stability of the hoop standard granulator can be improved.

Description

technical field [0001] The invention belongs to the technical field of granulation machinery, in particular to a constant-thickness spreader for a ring die granulator. Background technique [0002] The powder rotary extrusion granulation forming technology is widely used in the fields of feed machinery, biomass energy machinery and pharmaceutical machinery. It is the main way to produce pellet feed and biomass fuel. The feeding method between the ring die granulator modulator and the blanking ring directly determines the material distribution on the blanking ring, and the material on the blanking ring will be scraped into the extrusion area by the scraper, so the blanking ring The distribution state of the material directly determines the change of the extrusion force and the length of the extruded particles. The change of extrusion force is one of the main sources of vibration of the ring die granulator, and the consistency of the length of the granules is also one of the...

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Problems solved by technology

[0003] The feeding method of the current granulator between the modulator and the blanking ring is free fall, that is, falling or scraping into the extrusion zone. Due to the instability of the modulator output and the free fall, the amount of falling material will be very large. Uneven, the material falling into the blanking ring is also extremely unstable in the width direction of the blanking ring, and the amount of material in each extrusion zone of the multi-roll extrusion granulator is seriously uneven and random, resulting in The length of the discharged particles is different, and the extrusion force changes greatly, causing severe vibration; and the feeding method of free falling, that is, falling and scraping, makes the thickness of the material on the blanking ring directly related to its speed. When the speed fluctuates, the thickness of the material also It will fluctuate accordingly, and when the speed of the granulator decreases greatly by chance, the thickness of the material on the blanking ring at this position will become thicker. Therefore, in the next round of extrusion, the torque will become larger due to more material. As a result, the speed becomes smaller, and the vibration amplitude increases due to such a cycle, and as the speed decreases, the thickness of the material increases, which is very easy to cause blockage and production interruption.

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