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Fluidized bed granulator and filtering and reverse blowing control process

A fluidized granulator and fluidized bed technology, applied in the direction of dispersed particle filtration, dispersed particle separation, powder suspension method granulation, etc., can solve the problems of easy production failure, unreasonable design of filter device, poor shaking effect, etc. Achieve the effect of prolonging service life, eliminating production loss and reducing equipment cost

Active Publication Date: 2016-07-20
石家庄鼎锋制药设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a fluidized granulator to solve the problem of unreasonable design of the filter device and easy failures in production during the operation of the existing fluidized granulator
[0006] Another object of the present invention is to provide a filter blowback control process to solve the poor shaking effect of existing filter control methods

Method used

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  • Fluidized bed granulator and filtering and reverse blowing control process
  • Fluidized bed granulator and filtering and reverse blowing control process
  • Fluidized bed granulator and filtering and reverse blowing control process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The fluidized drying granulator of the present invention is mainly composed of a fluidized bed host system, an air intake system, an exhaust system, a feeding system, and a filtration backflush system, wherein the intake system is connected to the fluidized bed 7 of the fluidized bed host system At the bottom, the exhaust system is installed on the top of the fluidized bed, specifically, the exhaust pipe 8 of the exhaust system (see figure 1 ) is installed on the top of the fluidized bed, which is a cylindrical exhaust pipe. The feeding system is mainly composed of a binder feeding mechanism and a material feeding mechanism. The intake system, exhaust system and feeding system are all existing conventional design structures.

[0032] Such as figure 1 As shown, the filter blowback system is installed between the interface of the fluidized bed 7 and the exhaust pipe 8, and it is mainly composed of a fixed plate 3, an air distribution part, a filter bag 5 and a blowback p...

Embodiment 2

[0034] Start the fluidized bed drying granulator with the structure shown in Example 1 to make the intake system and exhaust system work, and then put in the binder and materials respectively through the feeding system for granulation and drying. During the production process, the exhaust system exhausts from the upper part of the fluidized fluidized bed through the exhaust pipe, and when the exhaust gas enters the exhaust pipe from the fluidized fluidized bed, it passes through the filter blowback system.

[0035] When the exhaust gas passes through the filter blowback system, the control process of the filter blowback system is:

[0036] Blowback pressure control: start the air compressor, input compressed air into the blowback pipe, and adjust the pressure of the compressed air in the blowback pipe so that the pressure of the compressed air blown to the inner surface of the air distribution part is 0.8MPa;

[0037] Blowback mode control: the current blowback pipe is blown b...

experiment example 1

[0059] The control method in Example 2 was used to filter and backflush the devices in Example 1 and Comparative Examples 1 to 7. After the production was finished, the dust removal rate of the filter bag and the deformation of the filter bag were counted. The results are shown in Table 1:

[0060] Table 1:

[0061]

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Abstract

The invention discloses a fluidized bed granulator. The fluidized bed granulator comprises a fluidized bed main engine system, an air inlet system, an exhausting system, a filtering and reverse blowing system and a feeding system, wherein the filtering and reverse blowing system is arranged at the upper part in a fluidized bed of the fluidized bed main engine system and comprises a fixing plate provided with a mounting hole, a plurality of air distribution parts fastened on the fixing plate, filtering bags which sleeve the outer parts of the air distribution parts, and a plurality of reverse blowing pipes which correspond to the air distribution parts. The invention further discloses a filtering and reverse blowing control process. The filtering and reverse blowing control process mainly adopts a pulse type reverse blowing manner; when a current reverse blowing pipe reversely blows for 2s-5s, reverse blowing is stopped; 5s-10s later, the next reverse blowing pipe is started to reversely blow for 2s-5s; then 5s-10s later, the next reverse blowing pipe is started until all the reverse blowing pipes reversely blow for one time respectively, and one pulse reverse blowing cycle is finished; and after one pulse reverse blowing cycle is finished, the next time of pulse reverse blowing is carried out after 30s-60s until the production is finished.

Description

technical field [0001] The invention relates to granulation equipment and related control technology, in particular to a fluidized granulator and its filter backflush control technology. Background technique [0002] The fluidized bed drying granulator is mainly used for drug granulation and coating. The powder material is put into the closed container of the hopper. Due to the action of the hot air flow, the powder is suspended in a fluidized state and circulated to achieve uniform mixing. At the same time, it is sprayed into the mist The binder wets the powder in the container to condense the powder into loose small particles. At the same time as the granulation, due to the efficient drying of the hot air flow, the water evaporates continuously and the powder continuously solidifies to form an ideal and uniform polymicron. Hole spherical particles, complete three processes of mixing, granulation and drying in one container. [0003] In order to avoid material loss, the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/16B01D46/04B01D46/02
CPCB01D46/023B01D46/04B01J2/16
Inventor 米欢乐
Owner 石家庄鼎锋制药设备有限公司
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