Ceramic Refractory Slide Plate for Low-Angle Meal Conveying
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Solution Overview
Problem
Conveying hot calcined raw meal, a Geldart group C material, from a calciner to a kiln inlet without cooling it down is inefficient due to the material's cohesion and difficulty in fluidization, leading to high energy consumption and installation costs in existing methods.
Innovation Solution
A slide plate for a conveyor with a longitudinal axis and through holes that creates a gas cushion to reduce the critical angle of slide, allowing for gentle gas flow and reduced slope, thereby minimizing energy losses and installation costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional slides are used to convey hot calcined raw meal, then the material can be transported, but the slope angle must be very steep (at least 60°) due to material cohesion, leading to high installation costs and large construction heights
Solution Approach 1:
The patent applies pneumatic principles by introducing a gas flow through the slide plate to create a gas cushion between the material and the slide surface. This gas cushion reduces friction and allows the material to be conveyed at much lower slope angles (below 60°), directly resolving the contradiction between conveying capability and construction height
Solution Approach 2:
The patent changes the physical state of the interface between material and slide by introducing gas flow, transforming the friction-based contact into a gas-cushioned contact. This parameter change in the interaction mechanism enables conveyance at reduced slope angles, solving the height problem
2Length of stationary object
If the slope angle is reduced to lower construction heights, then installation costs decrease, but the material cohesion prevents effective conveyance
Solution Approach 1:
By introducing gas flow through the slide plate, the patent creates a pneumatic cushion that overcomes material cohesion. This allows the slide to function effectively at low slope angles, simultaneously achieving reduced construction height and maintained conveying efficiency
Solution Approach 2:
The gas flow acts as an intermediary between the material and the slide surface, mediating the interaction by reducing direct contact and friction. This intermediary gas layer enables effective conveyance at slope angles that would otherwise be insufficient due to material cohesion
3Temperature
If fume jet transport is used to convey hot raw meal, then the material can be transported while hot, but CO2 emissions increase due to the direct heat exchange calciner and kiln operation
Solution Approach 1:
The patent extracts the CO2 from the process by introducing it through the slide plate as the gas flow medium. The CO2 is taken out of the harmful emission stream and put to useful purpose as the gas cushion medium, eliminating emissions while maintaining hot material transport
Solution Approach 2:
The patent converts the harmful CO2 emissions into a beneficial resource by using CO2 as the gas flow medium to create the cushioning effect. The CO2 that would otherwise be wasted or harmful is now serving a functional purpose, simultaneously reducing emissions and enabling low-angle conveyance
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 efficient conveyance of hot calcined raw meal at lower angles, reducing construction heights and operating costs while maintaining material temperature, thus optimizing the cement clinker manufacturing process.
Implementation Method 1
A slide plate for a conveyor with a longitudinal axis and through holes that creates a gas cushion to reduce the critical angle of slide
Data Source
AI summary
Methodology for conveying hot Geldart group C materials. A slide plate for a slide of a conveyor for Geldart group C materials having a longitudinal axis, an up-facing surface for supporting the Geldart group C materials, a lower surface, a front-end surface and a rear-end surface may have a significantly reduced slope if the slide plate is made of a ceramic refractory such that the slide plate has a number of through holes configured to provide fluid communication between fluid inlets in the lower surface and fluid outlets in the up-facing surface.