Grid Plate With Triangular Cavities For Cooling Wear
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Solution Overview
Problem
Existing grate cooler designs suffer from excessive wear and inefficient cooling due to direct contact with hot materials and lack of effective air injection systems, leading to premature degradation and operational disruptions.
Innovation Solution
A grate plate with triangular-section cavities and a fin-shaped bottom with a rising end, featuring air injection slots parallel to the bottom and a reverse slope to prevent material flow during air interruptions, combined with air injection slots on the front face to enhance cooling and reduce wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling air is injected through the entire surface of the grid plate, then cooling coverage is improved, but wear increases due to direct contact with hot material
Solution Approach 1:
The grid plate is divided into multiple cavities that segment the contact surface between hot material and the plate. This segmentation reduces the total area of direct contact while maintaining effective cooling coverage through strategic air injection points at cavity openings.
Solution Approach 2:
Cooling air is injected locally at specific cavity openings rather than uniformly across the entire surface. This localized injection targets areas where material accumulates and cooling is most needed, while reducing overall material-plate contact area to minimize wear.
2Productivity
If the grid plate surface is made smooth for easy material flow, then productivity is improved, but cooling efficiency decreases due to reduced air injection effectiveness
Solution Approach 1:
The smooth surface is segmented into multiple cavities with controlled openings. This segmentation allows the bulk surface to remain smooth for easy material flow while creating localized zones where air injection occurs to maintain cooling efficiency.
Solution Approach 2:
The cavities act as intermediaries between the smooth grid plate surface and the hot material. They facilitate material flow across the smooth surface while providing localized zones for cooling air injection to maintain thermal management.
3Temperature
If air injection slots are made narrow to control air flow, then cooling precision is improved, but pressure drop increases significantly
Solution Approach 1:
The air injection system transitions from two-dimensional surface slots to three-dimensional cavities with openings. This dimensional change allows for better flow distribution and reduced pressure drop while maintaining cooling precision through strategic opening placement and size control.
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 design ensures efficient cooling and regular material progression while minimizing wear, maintaining system functionality and reducing downtime by effectively controlling the progression rate and cooling efficiency.
Implementation Method 1
the bottom of each cavity has one or more slots for injecting cooling air into the lowest part of each of the cavities
Implementation Method 2
cooling air being injected through the side faces of the pockets
Implementation Method 3
the reverse slope (β) of the rising end being at an angle equal to or less than up to 6° to the angle (α) of the slope of the cavities
Data Source
Figure 1~2
Figure 3~5
AI summary
The present invention relates to a grid plate for the transporting and cooling of very hot materials leaving a furnace, said plate having cavities of rectangular shape, the largest dimension being perpendicular to the direction of advance of the materials, the cross section of these cavities being triangular with a fin-shaped bottom terminating in a turned-up end of reverse slope, the slope (a) of the cavities being between 10° and 45°, preferably between 20° and 30°, to the horizontal and the reverse slope (ß) of the turned-up end making an angle equal to or up to 6° less than the angle of the slope of the cavities. The flow of material under gravity through the air injection slits is interrupted. Any contact of the material with the framework and with the mechanism of the equipment is avoided.