Sequential Slurry Filtration Layout for Longer Filter Service

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Solution Overview

Problem

Existing slurry filtering devices require frequent filter replacement and cleaning due to the need for multiple filters connected in series, leading to low work efficiency and inconvenience.

Innovation Solution

A slurry filtering device with a housing containing multiple filters in separate compartments, connected in series through a slurry transport line, allowing sequential filtration and independent pressure adjustment, and featuring filters with varying pore sizes to enhance durability and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a conventional filter press is used for slurry filtering, then filtering capability is provided, but the device occupies large space and requires complex operation

Engineering Contradiction:
Improveoperation complexityVSAvoiddevice structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The filter press is divided into multiple independently operable filter chambers arranged in series. Each chamber can be operated separately or in combination with others, allowing the device to be segmented into smaller functional units that are easier to operate and maintain while providing scalable filtering capacity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Multiple filter chambers are nested or arranged in a compact configuration where smaller chambers are positioned within or adjacent to larger ones. This nesting arrangement reduces the overall space occupation while maintaining the filtering capabilities of multiple chambers, making the device more space-efficient.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Area of stationary object

If a large-scale filter press is used to reduce space occupation, then space efficiency is improved, but the filtering speed decreases

Engineering Contradiction:
Improvespace occupationVSAvoidfiltering speed
Core Design Contradiction:
Area of stationary objectVSProductivity

Solution Approach 1:

The filtering process is segmented into multiple parallel chambers that can operate simultaneously or in sequence. This segmentation allows the total filtering capacity to be maintained in a compact footprint, as each chamber contributes to the overall productivity while the compact arrangement reduces space occupation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The filter chambers are designed with movable components that can be dynamically adjusted during operation. The pressing mechanism can apply variable force and the chambers can be operated in different modes (simultaneous or sequential), allowing optimization of filtering speed within the constrained space of a compact design.

Inventive Principle:
Principle #15Dynamics

3Area of stationary object

If the filter press structure is made compact, then space occupation is reduced, but the device becomes difficult to disassemble and clean

Engineering Contradiction:
Improvespace occupationVSAvoiddisassembly and cleaning
Core Design Contradiction:
Area of stationary objectVSEase of repair

Solution Approach 1:

The compact filter press is segmented into modular chambers that can be independently accessed and disassembled. This segmentation allows maintenance personnel to access specific chambers for cleaning or repair without having to disassemble the entire compact structure, maintaining ease of maintenance despite the compact overall footprint.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The filter chambers are designed with preliminary consideration for maintenance access, incorporating features such as removable plates, accessible sealing surfaces, and designed disassembly paths that allow easy cleaning and repair operations even in the compact configuration. This preliminary design ensures that the compact structure does not compromise maintainability.

Inventive Principle:
Principle #10Preliminary action

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 device increases filtering time and efficiency by preventing interference between the transport line and filters, improves filter durability, and reduces the frequency of replacements.

Implementation Method 1

a first filter element (10) and a second filter element (20) which are arranged one after another in the flow direction of the slurry

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Implementation Method 2

a pressing device (30) for pressing the filter cake against the first filter element (10) and the second filter element (20)

Methodology Applied
Scientific EffectMechanical pressure: Pressure Increase

Data Source

PatentEP4391099B1Slurry filtering device
Publication Date: 2026.04.29 LG ENERGY SOLUTION LTD
  • EP4391099B1 patent drawingFigure 1
  • EP4391099B1 patent drawingFigure 2
  • EP4391099B1 patent drawingFigure 3

AI summary

There is provided a slurry filtering device with improved slurry filtering efficiency. The slurry filtering device according to an embodiment of the present disclosure includes a housing including a slurry accommodation portion inside to which a slurry is supplied, a plurality of filters received respectively in a plurality of divided spaces of the slurry accommodation portion and configured to filter at least some of particles in the slurry, and a slurry transport line connecting the plurality of divided spaces to supply the slurry to each divided space in a sequential order.