Dewatering Screen Deck Segmentation for Clogging and Wear Reduction
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Solution Overview
Problem
Dewatering screens face capacity limitations due to clogging and reduced water flow rates when handling high sand and water flow rates, leading to increased weight and wear issues when attempting to enlarge the deck size.
Innovation Solution
A dewatering screen design featuring a deck divided into a material dewatering region and separate water drainage regions with larger openings and apertures, allowing water to bypass the material dewatering region and drain into a sump, increasing capacity while reducing particulate concentration and preventing clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the deck size is increased to increase capacity, then the water flow rate and sand handling capacity are improved, but the weight and wear of the apparatus increase
Solution Approach 1:
The deck is segmented into distinct material dewatering regions and water drainage regions separated by dividing walls. This segmentation allows water to be channeled through dedicated drainage pathways with larger openings, increasing overall water flow capacity without requiring a proportionally larger deck area, thus improving productivity while controlling weight.
2Productivity
If the deck size is increased to increase capacity, then the sand handling capacity is improved, but the wear of the apparatus increases
Solution Approach 1:
By segmenting the deck into material dewatering regions and water drainage regions, sand is concentrated in specific dewatering zones rather than being distributed across the entire deck surface. This reduces the overall contact area between sand and deck, thereby reducing wear while maintaining or increasing sand handling capacity.
Solution Approach 2:
Different regions of the deck have different opening sizes and functions: material dewatering regions have smaller openings for sand retention, while water drainage regions have larger openings for efficient water removal. This local differentiation optimizes both sand handling capacity and deck durability by placing appropriate features in appropriate locations.
3Productivity
If the flow rate of sand and water onto the deck becomes too great, then the capacity is improved, but the water cannot pass through the deck quickly enough and excess water washes over the top
Solution Approach 1:
The deck is divided into material dewatering regions and separate water drainage regions. This segmentation creates dedicated pathways for water to flow through the deck structure via drainage apertures in the dividing walls, allowing high flow rates to be handled efficiently without water washing over the top, thereby maintaining reliable water separation even at high productivity levels.
4Productivity
If the flow rate of sand becomes too high, then the capacity is improved, but the apertures may become clogged with sand
Solution Approach 1:
By segmenting the deck into separate material dewatering regions and water drainage regions, sand is confined to specific dewatering zones with controlled aperture distributions. This prevents sand from accumulating and clogging drainage apertures, as the drainage regions are specifically designed for water flow with larger openings, maintaining reliable aperture functionality at high sand flow rates.
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 enhances the dewatering screen's capacity and reduces wear by allowing increased water flow through separate drainage regions, maintaining efficiency even at higher flow rates without the need for larger deck sizes, which would increase weight and wear.
Implementation Method 1
The frame being provided with a vibration generator for imparting vibration to the deck
Implementation Method 2
the at least one dividing wall separating the deck into a material dewatering region and one or more water drainage regions
Data Source
AI summary
A dewatering screen includes a frame, a deck mounted upon the frame, and the deck having a plurality of apertures therein. The frame is mounted on a base with a vibration generator for imparting vibration to the deck. A delivery device delivers wet particulate material to be dewatered onto the deck, and there is at least one dividing wall extending across a portion of the deck, the dividing wall(s) separating the deck into a material dewatering region and one or more water drainage regions. The delivery device delivers wet particulate material to be dewatered onto the material dewatering region of the deck.