Filtration Grid Support Layout for Scale-Resistant Drainage

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Solution Overview

Problem

Scale build-up in tilting pan filters blocks drain holes in the filtration grid, preventing the flow of filtrate from the filtration grid to the collection trough.

Innovation Solution

A cell vessel filtration grid with individual supports is designed to increase the open area for drainage and reduce clogging by maintaining adequate support for the filter cloth, using supports with specific dimensions and configurations to optimize the balance between open and support areas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional filtration grids with solid surfaces are used, then filter cloth support is adequate, but scale build-up blocks drain holes preventing filtrate flow

Engineering Contradiction:

Improvefiltrate flow reliabilityVSAvoidscale build-up blocking

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The filtration grid is segmented into discrete parallel supports rather than a continuous solid surface. This segmentation creates multiple independent drainage paths between supports, preventing complete blockage if scale accumulates in any single area, and allows filtrate to flow through the open spaces between supports to collection troughs.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filtration grid structure transitions from a solid non-porous surface to a porous-like open framework with spaces between supports. This open framework allows filtrate to pass through while providing support, and the geometry is designed to prevent scale from completely blocking the drainage paths.

Inventive Principle:

Principle #31Porous materials

2Productivity

If open area between supports is increased to reduce clogging, then filtrate drainage improves, but filter cloth support area decreases

Engineering Contradiction:

Improvefiltrate drainage efficiencyVSAvoidfilter cloth support area

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

The dimensions, spacing, and configuration of the parallel supports are optimized to achieve the desired balance. By adjusting parameters such as support width, spacing between supports, and support height, the grid provides sufficient open area for drainage while maintaining adequate support area for the filter cloth.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The support structure utilizes three-dimensional configuration with supports having specific heights and spacing. This allows the grid to provide both open area for drainage and support area for the filter cloth by distributing functions across different spatial dimensions rather than competing for two-dimensional area only.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20260021429A1Grid structure for filter device

Publication Date: 2026.01.22 ANDRITZ SEPARATION INC

AI summary

A filtration grid for a cell vessel includes: a plurality of supports disposed in a parallel configuration from a first end wall to a second end wall of the cell vessel, each support of the plurality of supports extending from a first sidewall to a second sidewall of the cell vessel. The supports are configured to provide a first specified amount of filtration grid area as open area and a second specified amount of the filtration grid area as support area for a filter element of the cell vessel.