Method for classifying calcium alginate plastic beads

A technology of calcium alginate and glue beads, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of low classification efficiency, classification restriction, clogging, etc., and achieve high classification efficiency, easy operation and separation effect. Good results

Inactive Publication Date: 2010-05-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The particle size range of the rubber beads prepared by electrostatic titration is 200-1000 μm. In order to obtain rubber beads with a relatively uniform particle size, the commonly used classification method is sieve screening, which has low classification efficiency and is easy to cause blockage.
People such as Zhang Qizhou have invented a kind of beaded agarose gel band sieve classifier (patent publication number CN2043135), this device has improved classification efficiency on the basis of screen mesh screening, but the classification of this method is still limited by the mesh mesh

Method used

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  • Method for classifying calcium alginate plastic beads
  • Method for classifying calcium alginate plastic beads
  • Method for classifying calcium alginate plastic beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Detect the particle size distribution of the rubber beads to be classified on the particle size analyzer (see figure 1 The blue distribution line in ), the particle size range of the beads includes two parts, the first part has a minimum particle size of 185 μm, a maximum particle size of 270 μm, and an average particle size of 225±15 μm; the second part has a minimum particle size of 356 μm, The maximum particle size is 471 μm, and the average particle size is 412±19 μm.

[0028] 2) Put the rubber beads to be classified in the fluidized bed, and the volume of the rubber beads accounts for 1 / 5 of the volume of the fluidized bed.

[0029] 3) Turn on the peristaltic pump, and slowly pump the calcium chloride solution with a concentration of 0.05mol / L from the fluid inlet 1 of the fluidized bed, and simultaneously open the fluid outlet 2 of the fluidized bed, and control the surface velocity of the fluid at 0.05cm / s, Until the fluid fills the entire cavity of the flui...

Embodiment 2

[0032] 1) Detect the particle size distribution of the rubber beads to be classified on the particle size analyzer (see figure 2 The blue distribution line in ), the particle size range of the beads includes two parts, the first part has a minimum particle size of 391 μm, a maximum particle size of 471 μm, and an average particle size of 429±20 μm; the second part has a minimum particle size of 517 μm, The maximum particle size is 751 μm, and the average particle size is 623±39 μm.

[0033] 2) Put the rubber beads to be classified in the fluidized bed, and the volume of the rubber beads accounts for 1 / 5 of the volume of the fluidized bed.

[0034] 3) Turn on the peristaltic pump, and slowly pump the calcium chloride solution with a concentration of 0.1mol / L from the fluid inlet 1 of the fluidized bed, and simultaneously open the fluid outlet 2 of the fluidized bed, and control the surface velocity of the fluid at 0.1cm / s. Until the fluid fills the entire cavity of the fluidi...

Embodiment 3

[0037] 1) Detect the particle size distribution of the rubber beads to be classified on the particle size analyzer (see image 3 The blue distribution line in the middle), the particle size distribution of the rubber beads is wide, the minimum particle size is 293 μm, and the maximum particle size is 815 μm.

[0038] 2) Put the rubber beads to be classified in the fluidized bed, and the volume of the rubber beads accounts for 1 / 10 of the volume of the fluidized bed.

[0039] 3) Turn on the peristaltic pump, and slowly pump the calcium chloride solution with a concentration of 0.3mol / L from the fluid inlet 1 of the fluidized bed, and simultaneously open the fluid outlet 2 of the fluidized bed, and control the surface velocity of the fluid at 0.06cm / s. Until the fluid fills the entire cavity of the fluidized bed.

[0040] 4) Slowly increase the speed of the peristaltic pump to increase the flow rate of the fluid until the bed expansion height of the rubber beads is consistent w...

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Abstract

The invention relates to a method for classifying calcium alginate plastic beads. In the method, the plastic beads to be classified are put into a fluidized bed and are used as solid phases; solution of calcium chloride is used as a mobile phase; the solution of the calcium chloride flows into the fluidized bed from a fluid inlet on the lower part of the fluidized bed through a peristaltic pump, flows through the inside of the fluidized bed, and finally flows out of the fluidized bed from a fluid outlet on the upper part of the fluidized bed; and the plastic beads are classified by changing the flow velocity of the ascending fluid according to the different sedimentation velocities of the plastic beads with different grain sizes in the fluid. The method classifies the calcium alginate plastic beads according to the grain sizes, the used device is simple, is easy to amplify and can separate the plastic beads of which the average grain size difference is 200 microns, and the classification range is between 100 and 1,000 microns.

Description

technical field [0001] The invention relates to the classification of gel-like bead-like microspheres, specifically a method for classifying them according to particle size by using the principle of fluid mechanics in a liquid-solid fluidized bed. Background technique [0002] Calcium alginate beads (hereinafter referred to as beads) are a kind of gel microspheres with a density of 1.02-1.03g / cm 3 , has been widely studied and applied in the fields of microcapsule preparation, drug controlled release, cell immobilization, and in vivo transplantation. The particle size range of the rubber beads prepared by electrostatic titration is 200-1000 μm. In order to obtain rubber beads with a relatively uniform particle size, the commonly used classification method is sieve screening, which has low classification efficiency and is easy to cause blockage. People such as Zhang Qizhou have invented a kind of beaded agarose gel band sieve classifier (patent publication number CN2043135),...

Claims

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Application Information

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IPC IPC(8): B03B5/62
Inventor 马小军黄晓波王为于炜婷谢维扬王建政
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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