Classifier Using Superheated Steam for Fine Particle Separation
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Solution Overview
Problem
Existing air classifiers and jet mill systems struggle to achieve high fineness in particle output, particularly when using air or inert gases, limiting the separation efficiency and yield of fine materials.
Innovation Solution
The use of superheated water vapor as the classifying gas in the classifier, with temperature control to prevent condensation, enhances separation efficiency and increases the fineness of the output product by adjusting the temperature of the superheated water vapor to maintain it above the saturated steam temperature, ensuring no condensation occurs during the classification process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If air or inert gases are used as classifying gas, then the classification process is simple and reliable, but the fineness of the output product is limited
Solution Approach 1:
The patent changes the physical parameter of the classifying gas from ambient temperature air to superheated steam, which fundamentally alters the separation characteristics and enables higher fineness in the output product. The temperature parameter is specifically controlled to maintain steam in superheated state throughout the classification process.
Solution Approach 2:
The patent utilizes the phase transition properties of water by generating superheated steam and maintaining it above saturation temperature. The steam remains in gaseous phase throughout the classification process, avoiding condensation that would occur at lower temperatures, thereby enabling continuous operation at elevated temperatures for improved separation.
2Manufacturing precision
If superheated steam is used as classifying gas, then the fineness of output product increases, but condensation may occur if temperature is not properly controlled
Solution Approach 1:
The patent implements temperature monitoring and control systems that provide feedback to maintain the superheated steam temperature above the saturation point. This feedback mechanism ensures the steam remains in the superheated state throughout the classification process, preventing condensation and ensuring stable, reliable operation.
Solution Approach 2:
The steam is pre-heated to superheated temperatures before entering the classification zone. This preliminary heating action ensures that the steam maintains sufficient temperature throughout the classification process, preventing condensation from occurring during particle separation.
3Measurement precision
If higher temperatures are used for superheated steam, then separation sharpness improves, but energy consumption increases
Solution Approach 1:
The patent applies the principle of partial action by using just sufficient superheat temperature to achieve the desired separation sharpness without excessive temperature elevation. The temperature is controlled to be above saturation point enough to prevent condensation and achieve improved separation, but not so high as to cause unnecessary energy consumption.
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
This approach significantly improves the fineness of the output product and yield by optimizing the separation limit, achieving higher fineness than with air and inert gases, and allows for a more efficient classification process with superheated steam, which promotes finer particle separation and higher yields.
Implementation Method 1
superheated steam is supplied to the classifier as classifying gas, and wherein the temperature of the superheated steam as classifying gas is selected to be so low that condensation of the superheated steam in the classifier just does not occur
Implementation Method 2
the temperature of the superheated steam as classifying gas is set so low that there is just no condensation of the superheated steam in the classifier
Implementation Method 3
the separation limit shifts to a finer level when using superheated steam as the classifying gas compared to air
Data Source
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AI summary
The invention relates to an operating method for a classifier (1) for classification, wherein superheated steam is supplied to the classifier (1) as the classifying gas, and wherein the temperature of the superheated steam is selected to be so low that condensation of the superheated steam in the classifier (1) is just prevented. Furthermore, the invention relates to a classifier (1) for classification, wherein the classifier (1) includes a classifying gas supply with a water feed (18) for generating superheated steam as the classifying gas, and wherein adjusting or regulating devices (20) for the temperature of the superheated steam as the classifying gas are provided and designed such that the temperature of the superheated steam as the classifying gas is set so low that condensation of the superheated steam in the classifier (1) is just prevented.