wet granulation unit

Abstract

The present invention provides a wet granulation device capable of maintaining a proper granulation process and effectively separating media. The wet granulation device disperses the material to be dispersed supplied from the introduction opening (54a) using beads, separates the material to be dispersed from the beads, and discharges the material to the insertion opening (55a). The wet granulation device comprises: a casing (2); a rotating container (5) rotatably supported on the casing (2); a container rotating mechanism (6) for rotating the container (5); 5) is installed in the container (5) with a processing gap (S) between the inner wall surfaces, and is provided on the peripheral wall to discharge the beads introduced into the cylinder from the processing gap (S) to the processing gap. (S) the dispersing rotor (7) of the medium discharge opening (71a); the rotor rotating mechanism (8) that makes the dispersing rotor (7) relatively rotate relative to the container (5); and the dispersing rotor (7) The material to be dispersed introduced into the inside of the dispersion rotor (7) through the processing gap (S) is guided to the screen (9) inserted through the opening (55a).

Description

technical field [0001] The present invention relates to a wet granulation device that granulates (disperses or pulverizes) a material to be granulated by mixing it with a solvent. Background technique [0002] An annular bead mill (annular type bead mill) that disperses a target material using beads is known as an example of a wet granulation device. In the past, it was known that Figure 9 In the shown bead mill, the bead mill is provided with: a container 100 that accommodates beads in advance and is supplied with a dispersion object material from the outside; A cylindrical rotor 101 installed in the container 100; and a bead separation mechanism 102 for separating the material to be dispersed and the beads passing through the annular gap (for example, refer to Patent Document 1). [0003] In this bead mill, the beads and the material to be dispersed move in the annular gap between the container 100 and the rotor 101, and along with this movement, the beads and the materi...

AI Technical Summary

Problems solved by technology

[0008] At this time, regarding the bead separation mechanism 102, it is conceivable to use a cylindrical screen formed with a plurality of openings having a diameter smaller than the diameter of the beads instead of the above-mentioned centrifugal separation mechanism. However, in this screen type separation mechanism, If the supply speed of the material to be separated is increased (the supply pressure is increased), the beads will be shifted and the beads will be concentrated around the screen, causing problems such as pressure rise in the container 100

[0009] In addition, as a further improvement method, it can also be considered to increase the centrifugal force acting on the beads by increasing the rotational speed of the rotor 101 and the bead separation mechanism 102 (or screen) to efficiently separate the beads. In the case of a large rotation speed, the dispersion is also actively carried out to cause so-called overdispersion, which leads to damage to the material to be dispersed and re-agglomeration caused by the activation of the particles accompanying the damage. not ideal

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