Non-rotating Screen Plate Grid for High Flux Filtration
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Solution Overview
Problem
Existing ultra-fine grid systems in water treatment face issues such as grid plate deformation due to rotation, small effective filtration area, complex operation and maintenance, and the need for extensive support equipment.
Innovation Solution
A large-flux ultra-fine grid system with non-rotating screen plates, featuring a grid body with a water intake module, filtering module, residue scraping module, residue pressing module, and water discharge module, where the filtering module includes stationary, slightly curved screen plates and rotating scrapers for residue removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rotating screen plates are used in traditional grid systems, then residue removal is achieved, but grid plate deformation and reduced reliability occur due to continuous rotation
Solution Approach 1:
Instead of rotating the screen plates to remove residue, the patent inverts the approach by keeping screen plates stationary and rotating the scrapers. This inversion resolves the contradiction by eliminating deformation risks from screen plate rotation while maintaining effective residue removal through scraper rotation.
Solution Approach 2:
The patent segments the residue removal function from the filtration function. The stationary screen plates perform filtration while separate rotating scrapers perform residue removal. This segmentation allows each component to be optimized independently, maintaining screen plate stability while ensuring effective residue clearance.
2Area of stationary object
If traditional drum grids with rotating screen plates are used, then residue scraping is possible, but the effective filtration area is small (less than 25%)
Solution Approach 1:
The patent inverts the traditional design by making screen plates stationary rather than rotating. This allows the entire cylindrical surface to be utilized for filtration without the need for rotation mechanisms, dramatically increasing the effective filtration area while reducing device complexity.
Solution Approach 2:
The patent transitions from a rotating drum design to a stationary cylindrical screen plate design, utilizing the full three-dimensional surface area. This dimensional optimization allows water to flow through the screen plates from all directions, maximizing the effective filtration area without requiring rotation.
3Use of energy by moving object
If rotating screen plates are used to achieve filtration, then residue removal is possible, but power consumption increases due to continuous rotation
Solution Approach 1:
The patent inverts the energy consumption model by eliminating the need to rotate heavy screen plates. Instead, only lightweight scrapers rotate to remove residue. This inversion dramatically reduces power consumption while maintaining high filtration flux through the stationary screen plates.
Solution Approach 2:
The stationary screen plates perform filtration passively without requiring rotational energy input. The system utilizes the natural flow of water through the screens, and only minimal energy is required for periodic residue removal by rotating scrapers, achieving self-service operation with low power consumption.
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 system achieves a significantly larger effective filtration area, improved filtration flux, reduced power consumption, and simplified operation and maintenance, addressing the limitations of traditional grid systems.
Implementation Method 1
the filtering module includes a water retaining platform, an inflow water guide plate, a first aperture screen plate area, a second aperture screen plate area, and a central water retaining weir located in a center of the filtering module
Implementation Method 2
the residue scraping module includes scrapers, a driving motor, a support frame, a residue inlet, and a guide rail
Implementation Method 3
The residue pressing module includes a squeezing cylinder, a motor, and a residue outlet
Data Source
AI summary
The present disclosure provides a grid system, including a grid body and supports, where the grid body includes a water intake module, a filtering module, a residue scraping module, a residue pressing module, and a water discharge module; the filtering module is disposed at a middle-upper part of the grid body, the water intake module and the residue pressing module are organically coupled at a lower part of the filtering module, and the water intake module includes a water inlet and a water distribution area; the filtering module includes a water retaining platform, an inflow water guide plate, screen plate areas, and a central water retaining weir; the residue scraping module includes scrapers, a driving motor, a support frame, a residue inlet, and a guide rail; the residue pressing module includes a squeezing cylinder, a motor, and a residue outlet.