Media-Circulation Pulverizer Guide Ring for Uniform Flow
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Solution Overview
Problem
The existing media-circulation type pulverizers face issues with non-uniform pulverization and energy inefficiency due to unstable helicoidal flows and centrifugal force localization, which leads to segregation of pulverizing media and inadequate dispersion of raw materials.
Innovation Solution
A media-circulation type pulverizer with a simpler structure featuring an annular partition wall, a media guide member, and a media separation member, which creates a stable helicoidal flow by suppressing the primary flow and strengthening the secondary flow, ensuring uniform distribution and efficient pulverization without dynamic localization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulverizing media are concentrated around the maximum-diameter portion where centrifugal force is maximized, then the media can be retained in the pulverization chamber, but the dispersion or pulverization force varies with position causing non-uniform pulverization
Solution Approach 1:
The pulverization chamber is divided into multiple radial zones by the guide ring, creating an inner section and an annular outer section. This segmentation prevents media concentration in a single location and distributes pulverization action across different radial positions, ensuring more uniform particle size distribution throughout the processed material.
Solution Approach 2:
Different regions of the pulverization chamber are given different functions: the outer section serves as an upward flow path while the inner section handles downward flow. This local differentiation of flow patterns and media distribution ensures that each region contributes appropriately to overall uniform pulverization, with media continuously circulated between zones rather than localized.
2Productivity
If a guide ring is installed to radially divide the pulverization chamber into inner and outer sections, then media segregation is suppressed and pulverization efficiency is enhanced, but the structure becomes more complex
Solution Approach 1:
The guide ring performs multiple functions simultaneously: it radially divides the pulverization chamber into distinct flow zones, guides the upward flow of media-slurry mixture in the outer section, directs downward flow in the inner section, and prevents media segregation. This multi-functionality achieves enhanced pulverization efficiency without proportionally increasing structural complexity.
Solution Approach 2:
The guide ring is designed with a curved, annular shape that conforms to the cylindrical geometry of the pulverization chamber. This curved structure integrates smoothly with the existing chamber geometry, creating efficient flow patterns without requiring additional complex components or disrupting the overall simple cylindrical design.
3Productivity
If helicoidal flow is formed with primary and secondary flow components, then media circulation is improved, but the flow becomes unstable due to centrifugal force causing dynamic localization
Solution Approach 1:
The helicoidal flow is segmented into distinct upward and downward flow paths by the guide ring. The outer annular section handles upward flow while the inner section handles downward flow, creating stable, separated flow streams that prevent the dynamic localization and instability that would occur in a single mixed flow path.
Solution Approach 2:
The guide ring creates a flow configuration where media are continuously circulated between zones at different radial positions, establishing a balanced circulation pattern. This equipotential-like circulation ensures that media experience consistent handling throughout the chamber, preventing localized instabilities and maintaining uniform flow characteristics.
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 solution enables effective separation and dispersion of pulverizing media, achieving high-quality pulverization with improved energy efficiency and uniform particle size distribution, reducing the likelihood of media stagnation and enhancing the capability of the media separation member.
Implementation Method 1
due to centrifugal force, dynamic localization is likely to occur
Implementation Method 2
a flow of the mixture of the pulverizing media and the raw material slurry can be formed as a combined flow (i.e., helicoidal flow)
Implementation Method 3
moving upwardly through the upward flow path between the guide ring and the pulverization container, and then moving downwardly
Implementation Method 4
a media separation member provided underneath the media guide member... enabling a product slurry after separation of the pulverizing-dispersing media by the media separation member to be discharged
Data Source
AI summary
The media-circulation type pulverizer comprising: an agitating member disposed in a lower region of a pulverization chamber; an annular partition wall disposed to extend upwardly in the pulverization chamber; and a media guide member provided on a lower surface of the end plate of the agitating member, wherein the annular partition wall has a height set to be ⅗ to ⅘ of a height of the pulverization chamber, and the media guide member has a lower end which enters a space of the inner region of the pulverization chamber located inside the annular partition wall, and wherein a vertically-extending flow straightening blade is provided between said lower portion of the media guide member and an upper portion of the annular partition wall, and the media separation member is provided on the lower end of the lower portion of the media guide member.