Rotating bucket type granulator

Abstract

The invention discloses a rotating bucket type granulator. The rotating bucket type granulator is characterized by comprising a machine frame, a rotating bucket, a bucket cover and a screen plate. The rotating bucket is connected with the machine frame through a hollow main shaft assembly, and the lower end of the main shaft assembly is communicated with an air supplying mechanism. The bucket cover is connected with the machine frame through a vertical lifting assembly, and the bucket cover is provided with a feeding hopper, a dust collector, a material distributing device, a scraper assembly and a plurality of sets of rotating cutter assemblies. The rotating center of the scraper assembly is located in the middle point of the radius of the rotating bucket, the rotating centers of the rotating cutter assemblies deviate from the axis of the rotating bucket, and the distances between the rotating centers of the rotating cutter assemblies and the axis of the rotating bucket are not equal. The rotating bucket type granulator has the advantages that the structure is compact and reasonable, the yield is large, the energy consumption is low, the dust is little, and the functions are multiple; in the granulating process, the scraper assembly and the rotating cutter assemblies break produced large particles in time, the material is effectively prevented from adhering to the surfaces and blocking, the produced particles are spherical or in the shape close to a ball, fluidity is good, the number of large particles and the amount of fine powder in the product are small, and the rate of finished particles is high.

Description

Technical field [0001] The invention relates to a granulator, in particular to a rotary bucket type granulator, belonging to the technical field of granulating equipment. Background technique [0002] In the pharmaceutical and chemical fields, granulating drying equipment is widely used. At present, the most commonly used are high-speed mixing granulator and spray granulator. [0003] The high-speed mixing granulator uses the blades to rotate at high speed to mix solid and liquid materials or make soft materials or wet particles. In the long-term use process, some shortcomings of the high-speed mixing granulator have also been discovered by people, which are mainly reflected in: the high-speed mixing granulator can only perform mixing and granulation, and cannot achieve drying; the amount of fine powder produced is high, It is often necessary to go through extrusion granulation (such as a swing granulator) for re-extrusion, resulting in waste of manpower and material resources; w...

AI Technical Summary

Problems solved by technology

Its main defects are: large equipment volume, high energy consumption, complex structure, high energy consumption and manufacturing cost

[0006] 1. The turntable rotates at the bottom of the mixing granulation chamber, and the materials at the bottom and in the middle rotate with the turntable. However, due to the resistance of the barrel wall, the rotating speed of the surrounding materials will be significantly reduced, and the mixing effect is not good; in addition, the rotating part and the non-rotating part There will be a shear surface between materials with different speeds, and the materials will form local rolling in this shear surface and form large pieces.

[0007] 2. In order to ensure the rotation of the turntable, there must be a gap between the turntable and the inner wall of the chamber

However, this gap will cause many problems, such as material leakage, friction, metal chips and other serious problems

[0008] 3. During the granulation process, dry and wet materials will have a certain viscosity after mixing, and the material is easy to stick to the wall, especially the granulation of traditional Chinese medicine products, the problem of sticking to the wall is extremely prominent

[0010] 1. The drum of the equipment is of single-layer structure, and the hot air used for drying materials flows downward from the top, so that only the surface of the materials can be dried, and the efficiency is low. At the same time, the hot air supply and exhaust will form a local short circuit, and part of the hot air is directly extraction, affecting thermal efficiency

[0011] 2. Neither the rotary drum nor other internal structures (such as guide rails) can automatically remove the materials adhered to the surface, which will cause the materials to become stickier and thicker, and eventually fail to work

[0013] In addition, since the mixing, granulating and drying all-in-one machine does not have a large particle (caking) crushing device, it cannot be processed when large particles and agglomerates appear, which affects the normal use of the equipment

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