Integrated Static Dynamic Grain Sifter Design
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Solution Overview
Problem
Existing granular material sifting devices face challenges in achieving high viewing efficiency and minimizing investment and operating costs, particularly due to the complexity and height of multi-stage classifier designs that increase costs and energy expenditure.
Innovation Solution
A compact design combining a static sifter with a dynamic rod basket sifter, where the static sifter is connected directly to the side of the dynamic sifter, with a vertical axis of rotation, and a tangentially or spirally connected classifier housing, optimizing energy efficiency and deagglomeration of coarse materials, and utilizing adjustable impact and guide components for improved airflow control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-stage classifier design with separate static and dynamic classifiers is used, then classification efficiency is improved, but device complexity and height increase
Solution Approach 1:
The patent combines the static classifier and dynamic classifier into a single integrated device where the static classifier housing is directly connected to the dynamic classifier housing. The static classifier forms a first classifying stage and the dynamic classifier forms a second classifying stage, merging two separate classification functions into one compact unit, thereby reducing device complexity while maintaining high classification efficiency.
2Productivity
If a multi-stage classifier design with separate classifiers is used, then classification efficiency is improved, but height and investment costs increase
Solution Approach 1:
The static classifier housing is directly connected to the dynamic classifier housing in an integrated arrangement, eliminating the need for separate classifier units and connecting lines. This merging of classifiers into a single compact unit reduces the overall height of the device while maintaining the multi-stage classification efficiency.
3Manufacturing precision
If traditional multi-stage classifier design is used, then separation capability is improved, but energy expenditure increases
Solution Approach 1:
The integrated design merges the static and dynamic classifiers into a single unit with direct housing connection, eliminating energy losses associated with material transport between separate classifiers. The combined configuration maintains three-fraction separation capability while reducing overall energy expenditure through improved material flow efficiency.
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 configuration enhances the selectivity and efficiency of granular material separation into three fractions, reducing energy expenditure and operational costs while maintaining high viewing efficiency, suitable for use in grinding systems with roller presses.
Implementation Method 1
the static classifier has a plurality of impact and guide internals arranged one below the other in a staircase-like manner
Implementation Method 2
the dynamic classifier is designed as a rod basket classifier with a rotating rod basket
Implementation Method 3
The fine material separated from this classifier is discharged together with the classifying gas and collected as finished product in the subsequent cyclones
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a device (1) for sifting granular material into at least three fractions, comprising at least one static sifter (2) forming a first sifting stage and at least one dynamic sifter (3) forming a second sifting stage, wherein the static sifter (2) has several impact installations and conducting installations (8, 9) arranged one below the other in the manner of stairs in a sifter housing (4) having a first material inlet (5), a sifting gas inlet (6), and a coarse material outlet (7), wherein the dynamic sifter (3) is designed as a rod basket sifter having a rotary rod basket (12) and has a sifter housing (11) having at least one medium material outlet (17) and one fine material outlet (18). The static sifter (2) is directly connected laterally to the second sifter housing (11) of the dynamic sifter (3) by means of the sifter housing (4) of the static sifter, which sifter housing is arranged, for example, in the manner of a shaft and at an angle to the vertical, and the static shifter transitions into the second shifter housing. The rod basket (12) of the dynamic sifter (3) rotates about a vertical axis (14).