Cyclical Wet Sieving Device for Polysaccharide Granules
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Solution Overview
Problem
Existing sieving devices in medical technology fail to effectively separate microsphere granules of different particle sizes without generating dust, damaging the granules, and are noisy, leading to reduced yield and contamination risks.
Innovation Solution
A cyclical and continuous device for wet sieving of polysaccharide granules, featuring multiple dosing tanks, circulation pumps, and mesh filters with a stirring mechanism to disperse and separate granules without mechanical stress, reducing dust and noise, and utilizing a pneumatic system for efficient liquid handling and sieve mesh replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional mechanical sieving devices are used, then particle size separation can be achieved, but dust is generated and granule integrity is damaged
Solution Approach 1:
The patent replaces traditional mechanical vibration and shaking mechanisms with a fluidized bed system using air flow. The granules are suspended in an air stream, allowing separation by particle size through differential settling velocities without mechanical contact, thereby eliminating dust generation and granule damage while maintaining separation precision
Solution Approach 2:
The patent creates a closed system with controlled air flow environment that prevents dust from escaping into the surrounding atmosphere. The fluidized bed operates in an enclosed chamber where air flow is contained and directed, keeping the separation process isolated from the external environment and preventing contamination
2Manufacturing precision
If traditional mechanical sieving devices are used, then particle size separation can be achieved, but noise is generated and granules are damaged
Solution Approach 1:
The patent eliminates mechanical vibration motors and shaking mechanisms by using a fluidized bed system where air flow provides the separating force. This substitution removes the primary noise sources and mechanical impact forces that damage granules, while maintaining effective particle size separation through aerodynamic principles
Solution Approach 2:
The patent uses pneumatic principles by introducing air flow through a distributor plate to fluidize the granule bed. The controlled air stream suspends granules and enables separation based on terminal velocity differences, providing a noise-free alternative to mechanical systems while preserving granule integrity
3Manufacturing precision
If traditional batch sieving is used, then separation can be performed, but productivity is low and time consumption is high
Solution Approach 1:
The patent implements continuous operation by maintaining a constant fluidized bed state with continuous air flow and granule circulation. Granules are continuously fed, separated, and collected without batch interruptions, eliminating the loading-unloading cycles of traditional devices and achieving both high separation quality and continuous productivity
Solution Approach 2:
The patent performs preliminary fluidization and uniform distribution of granules in the air stream before separation occurs. This pre-conditioning ensures all granules are properly suspended and positioned for efficient separation, maximizing both separation accuracy and processing throughput in the main separation zone
4Stability of the object's composition
If mechanical stirring is used to disperse granules, then uniform distribution is achieved, but granule surface appearance is destroyed
Solution Approach 1:
The patent replaces mechanical stirring blades and impellers with a fluidized bed system using air flow for dispersion. The gentle aerodynamic forces uniformly distribute granules through the air stream without mechanical contact, achieving homogeneous mixing while completely preserving granule surface appearance and shape
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively separates polysaccharide granules by particle size with minimal dust generation, preserving granule integrity, reducing noise, and increasing yield, while being economical and easy to clean, with improved precision and energy efficiency.
Implementation Method 1
A sieve of a mesh filter for coarse powder is disposed in the first dosing tank. A sieve of a mesh filter for fine powder is disposed in the second dosing tank.
Implementation Method 2
a first circulation pump, a second circulation pump, and a third circulation pump
Implementation Method 3
A stirring device is disposed in both the first dosing tank and the second dosing tank.
Data Source
AI summary
A cyclical and continuous device and method for wet sieving of polysaccharide granules are provided. The device includes a first dosing tank, a second dosing tank connected to the first dosing tank by a first circulation pump, a first suction filtration tank connected to the second dosing tank by a second circulation pump, and a second suction filtration tank connected to the first dosing tank by a third circulation pump. An overflow port provided on a side wall of the second dosing tank is higher than a feed port of the first dosing tank. A sieve of a mesh filter for coarse powder is disposed in the first dosing tank. A sieve of a mesh filter for fine powder is disposed in the second dosing tank. A stirring device is disposed in both the first dosing tank and the second dosing tank.