High-Solid Slurry Stirring with Pre-Wetting Soaking Paddles
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Solution Overview
Problem
Existing stirring devices struggle to achieve uniform mixing and dispersion of high solid content and high viscosity slurries due to difficulties in wetting fine powder particles, leading to issues like layering and agglomeration precipitation.
Innovation Solution
A stirring device with a feed paddle, infiltration paddles, and infiltration columns that utilize a spiral design and oblique paddle surfaces to pre-wet powder, combined with a cooling system to maintain slurry properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a stirring paddle is used to directly mix powder and liquid in a mixing container, then the mixing process is simple, but uniform mixing and dispersion cannot be achieved due to poor wetting of fine powder particles
Solution Approach 1:
The patent applies preliminary action by introducing liquid into the mixing container before powder, allowing the liquid to be pre-positioned and ready to wet the powder particles as they enter. This sequence ensures that powder particles are immediately surrounded by liquid upon contact, achieving effective wetting and preventing agglomeration from the outset of the mixing process.
Solution Approach 2:
The patent applies local quality by creating different functional zones within the mixing container: a liquid introduction zone at the bottom for pre-positioning liquid, a powder introduction zone at the top for controlled powder addition, and a mixing zone in between where the actual wetting and mixing occurs. Each zone has optimized characteristics for its specific function, improving overall mixing uniformity.
2Manufacturing precision
If fine powder particles with large specific surface area are used, then the slurry quality is improved, but wetting difficulty increases leading to agglomeration precipitation
Solution Approach 1:
The patent applies hydraulics by utilizing liquid flow dynamics to transport and wet fine powder particles. The liquid is introduced at the bottom and flows upward, creating a hydraulic environment that surrounds and wets powder particles as they descend. This hydraulic action ensures that even fine particles with large surface areas are effectively wetted without requiring additional pneumatic or mechanical wetting aids.
Solution Approach 2:
The patent applies preliminary action by pre-introducing liquid into the mixing container before powder addition. This ensures that the liquid is already in position and ready to immediately wet the fine powder particles upon their introduction, preventing the particles from contacting each other and agglomerating before being wetted.
3Device complexity
If powder and liquid are separately introduced and directly mixed, then the device structure is simple, but mixing time is extended due to poor mixing effect
Solution Approach 1:
The patent applies preliminary action by pre-positioning liquid in the mixing container before powder introduction. This preliminary arrangement eliminates the need for complex pre-wetting devices or multi-stage mixing mechanisms, maintaining structural simplicity while significantly reducing mixing time through immediate and effective wetting upon powder contact.
Solution Approach 2:
The patent applies segmentation by dividing the mixing process into distinct sequential stages: liquid introduction stage, powder introduction stage, and mixing stage. This temporal segmentation allows each stage to be optimized independently with simple structural components, achieving efficient mixing without increasing overall device complexity.
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
Enhances mixing efficiency and uniformity of high solid content slurries by accelerating wetting and dispersion, reducing mixing time and preventing agglomeration, while maintaining slurry quality through heat management.
Implementation Method 1
a feed paddle disposed in the feed channel to stir the powder entering the feed channel through the powder inlet; wherein the feed paddle is installed on the feed spindle to rotate with the feed spindle
Implementation Method 2
a plurality of infiltration paddles rotatably disposed in the infiltration channel around a central axis to stir the mixture of powder and liquid in the infiltration channel when rotating
Implementation Method 3
a plurality of infiltration column members disposed between two infiltration paddles to divide the flow of the mixture of powder and liquid along the infiltration channel at the infiltration column members
Implementation Method 4
a paddle blade portion for simultaneously exerting a force in the axial direction and the centrifugal direction of the central axis on the mixture of powder and liquid in the infiltration channel when the infiltration paddle rotates
Data Source
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AI summary
This application discloses a stirring device 100 suitable for high-solid content slurry, including a stirring tank body 101, a feed pipe assembly 102 forming a powder inlet 102a, a liquid inlet 102b, and a feed channel communicating with the stirring space; a feed spindle, a feed motor; a feed paddle; further including: a soaking pipe assembly 107 forming a soaking channel communicating with the feed channel; a plurality of soaking paddles rotatably disposed in the soaking channel with the central axis as the axis of rotation; and a plurality of soaking columns disposed between two soaking paddles. Among them, the soaking paddle includes: a connecting shaft portion for forming a non-rotatable connection with the feed spindle; and a paddle blade portion for simultaneously exerting a force along the axial direction and the centrifugal direction of the central axis on the mixture of powder and liquid in the soaking channel when the soaking paddle rotates. The beneficial aspect of this application is that it provides a stirring device suitable for high-solid content slurry that improves the mixing effect by setting soaking paddle blades and soaking columns to cooperate in pre-soaking the powder.