Self-Cleaning Mixing Devices Using Periodic Reverse Rotation
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Solution Overview
Problem
Fouling and agglomeration of solids and liquids on mixing device elements lead to decreased efficiency and increased costs due to the need for frequent cleaning, disrupting the continuous coating process of granular substrates.
Innovation Solution
Operating mixing devices with rotational elements in alternating patterns, such as cycles of forward and reverse rotation, to prevent build-up and allow for continuous operation without cleaning, using modified paddles or mixers that can self-clean and maintain product quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mixing devices operate continuously for extended periods, then productivity increases, but fouling and agglomeration on mixing elements worsen
Solution Approach 1:
The mixing device alternates between forward rotation and reverse rotation in periodic cycles. During forward rotation, coating material is applied to substrates; during reverse rotation, build-up on mixing elements is removed. This periodic reversal prevents fouling accumulation and enables continuous operation without cleaning interruptions.
Solution Approach 2:
The mixing device performs self-cleaning through its own reverse rotation movement. The reverse rotation automatically removes build-up from mixing elements without requiring external cleaning operations, allowing the system to maintain productivity while preventing fouling self-service manner.
2Reliability
If mixing devices are stopped for cleaning, then fouling is removed, but productivity decreases
Solution Approach 1:
Instead of stopping for cleaning, the system implements periodic reverse rotation during normal operation. This allows cleaning to occur intermittently within the continuous process, maintaining both device cleanliness and production continuity without interruption.
Solution Approach 2:
The reverse rotation cleaning action is integrated into the continuous coating process rather than being a separate discontinuous operation. The mixing device continuously alternates between coating and self-cleaning modes, eliminating idle time and maintaining uninterrupted productive action.
3Reliability
If cleaning operations are performed frequently, then fouling is prevented, but operational time is lost and costs increase
Solution Approach 1:
Cleanin g is performed periodically through reverse rotation at optimized intervals rather than continuously or at frequent discontinuous stops. This timing optimizes the balance between maintaining cleanliness and maximizing productive operation time, reducing overall cleaning interruption time.
Solution Approach 2:
The system performs self-cleaning during operation without requiring external cleaning operations or process interruptions. This eliminates the time loss associated with manual cleaning and reduces operational costs by maintaining cleanliness autonomously.
Data Source
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AI summary
The invention relates to mixing devices, methods of operating mixing devices, and methods of blending a granular substrate with a coating material. These mixing devices and methods substantially prevent the agglomeration of solids and/or viscous liquids on rotational and/or static elements of the mixing device.