Fluidized Batch Drying Control for Consistent Residual Moisture
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Solution Overview
Problem
Existing fluidization apparatuses for treating batches of materials with moisture content face challenges in achieving consistent residual moisture content due to variations in drying gas moisture content, leading to inconsistent treatment results and increased costs from in-line moisture sensors.
Innovation Solution
A method and apparatus unit that calculates the material end temperature as the sum of the material minimum temperature and a fixed increase temperature, determined through reference measurements or a database, without requiring additional sensors, ensuring consistent residual moisture content across batches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If in-line moisture sensors are used to monitor residual moisture content, then measurement precision is improved, but device complexity and costs increase
Solution Approach 1:
The patent replaces physical moisture sensors with a calculation-based approach using temperature measurements. The control device calculates residual moisture content based on the relationship between material temperature, drying gas temperature, and drying gas moisture content, eliminating the need for complex in-line moisture sensing hardware.
Solution Approach 2:
The patent uses temperature measurements as an intermediary parameter to infer moisture content. Instead of directly measuring moisture, the system measures temperature (an easier-to-obtain parameter) and uses it to calculate the residual moisture content through established thermal relationships during the drying process.
2Adaptability or versatility
If drying gas moisture content varies, then adaptability to different drying conditions is improved, but manufacturing precision of residual moisture content deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the control device continuously monitors material temperature and drying gas parameters, then adjusts the drying process based on calculated residual moisture content. This closed-loop control ensures consistent results despite variations in drying gas moisture content by compensating in real-time.
Solution Approach 2:
The patent changes the control parameter from fixed drying gas moisture content to dynamic temperature-based control. By monitoring material temperature changes and using them to calculate residual moisture, the system adapts to varying drying gas conditions while maintaining precise control over the final moisture content through parameter adjustment.
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
Achieves consistent residual moisture content across batches, reducing investment and operational costs while avoiding microbiological contamination and processing issues, such as tablet hardness problems.
Implementation Method 1
at least part of a liquid in the material of the batch that has been introduced into the fluidization chamber, which constitutes the moisture content in the material, is evaporated by heat being supplied by means of the drying gas
Implementation Method 2
heat being supplied by means of the drying gas
Implementation Method 3
the material of the batch cools down from an initial material temperature to a material minimum temperature as a result of the associated removal of evaporation heat
Data Source
AI summary
A method and a fluidization apparatus unit for treating a large number of batches of a material having a moisture content and having a material temperature. The fluidization apparatus unit includes a fluidization apparatus. The fluidization apparatus has a fluidization chamber which has a material inlet and a material outlet, and also includes a fluid inlet and a fluid outlet for a drying gas which fluidizes the material in the fluidization chamber and which has a drying gas moisture content.