Aero-Flotation Particle Bed Cooling for Stable Polishing Temperature
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Solution Overview
Problem
Existing polishing processes using solid particles face challenges in temperature control due to the Joule effect and friction, leading to temperature fluctuations that affect the effectiveness and homogeneity of the treatment, degrade the particles, and reduce their useful life.
Innovation Solution
A method and equipment using aero-flotation to control particle temperature by circulating gas through the interstitial environment between particles, allowing temperature adjustment and chemical composition modification, with gas injection from the bottom of the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid particles are used for polishing with electrolyte and electrical current conduction, then polishing effectiveness is improved, but temperature increases due to Joule effect and friction
Solution Approach 1:
The patent introduces a dielectric liquid as an intermediary medium that surrounds the conductive solid particles. This liquid medium acts as a heat sink and thermal regulator, absorbing excess heat generated during polishing while maintaining particle conductivity. The dielectric liquid enables continuous operation by preventing particle overheating without interfering with the electrochemical polishing process.
Solution Approach 2:
The patent employs a fluid circulation system where dielectric liquid is pumped through the particle bed, enabling active thermal management. The hydraulic flow removes heat from particles continuously, maintaining optimal temperature for polishing effectiveness while preventing thermal degradation of the particles.
2Temperature
If temperature control is implemented through liquid recirculation, then thermal regulation is improved, but particle recirculation becomes difficult due to clogging
Solution Approach 1:
The dielectric liquid serves as a mediator that enables thermal control without requiring direct particle pumping. The liquid circulates through the particle bed, absorbing heat, while particles remain suspended or settled in the fluid medium. This separates the thermal management function from particle transport, avoiding clogging issues.
Solution Approach 2:
The patent replaces mechanical particle pumping with a fluid-based thermal management system. Instead of forcing particles through recirculation channels (which causes clogging), the system uses dielectric liquid circulation to remove heat, substituting mechanical particle transport with fluid-mediated thermal regulation.
3Temperature
If heat exchangers are introduced into the particle system, then thermal control capability is improved, but heat transfer efficiency decreases due to low particle thermal conductivity
Solution Approach 1:
The patent uses a dielectric liquid circulation system to enhance heat transfer from particles. The liquid flows through and around particles, providing continuous thermal contact and removing heat more efficiently than solid heat exchangers could achieve with low-conductivity particles. The fluid medium compensates for particle thermal resistance through convective heat transfer.
Solution Approach 2:
The dielectric liquid acts as a thermal intermediary that bridges the heat transfer gap between particles and the cooling system. Rather than relying on direct solid-to-solid heat exchanger contact (which is inefficient with low-conductivity particles), the liquid mediator provides efficient thermal coupling through convection and conduction in the fluid phase.
4Device complexity
If peripheral heat exchangers are used, then system complexity is reduced, but thermal gradient from centre to periphery increases
Solution Approach 1:
The patent employs internal fluid circulation where dielectric liquid is pumped through the center of the particle bed and flows outward, or vice versa. This internal flow pattern ensures uniform heat removal throughout the particle mass, eliminating thermal gradients between center and periphery. The hydraulic circulation pattern distributes thermal energy evenly across the entire processing volume.
Solution Approach 2:
Instead of placing heat exchangers on the periphery (external cooling), the patent inverts the approach by introducing cooling fluid through the center or within the particle bed (internal cooling). This inversion of the cooling geometry ensures that heat is removed from the thermal source (particle center) rather than trying to conduct it outward to peripheral exchangers, thereby eliminating thermal gradients.
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
Achieves efficient temperature control, maintaining particle effectiveness and homogeneity, preventing degradation, and enhancing polishing results by adjusting temperature and electrochemical conditions.
Implementation Method 1
circulation of a gas through the interstitial environment between particles... heat exchange between said gas and said particles and their environment
Implementation Method 2
Joule effect generated during conduction of electrical current through the particles
Implementation Method 3
friction or a combination of both effects
Data Source
AI summary
The invention relates to a method and equipment for controlling the temperature of particles in polishing processes using solid particles and/or solid particles with an electrolyte, inside a container, said method comprising a step in which a gas is circulated through the environment between the particles located inside a container. Said method may further comprise a simultaneous or prior step of adjusting the chemical composition of the particles or their environment. The equipment comprises means for injecting a gas (3), which in some cases is preferably injected from the bottom of the container (1), said means comprising an aero-flotation device (4) and, optionally, also a moistening device (5) for suspending droplets of a liquid in said gas (3).