Pre-coating Filter Device with Rotational Backwashing
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Solution Overview
Problem
Existing pre-coating filter devices face issues with filtration performance degradation due to clogged pores and the shortening of filter life cycles caused by high-pressure air injection during backwashing, which can lead to filter damage and media loss.
Innovation Solution
A pre-coating filter device that employs a filter rotation unit applying rotational force to detach adhered materials, combined with high-pressure backwashing water and air injection to effectively remove filter media and foreign materials, enhancing filtration efficiency and extending filter life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If high-pressure air injection is used during backwashing to remove adhered materials, then the detaching effect is improved, but the filter life is shortened and filter damage occurs
Solution Approach 1:
The invention changes the parameter of backwashing medium from air to water, which fundamentally alters the cleaning mechanism. Water provides sufficient detaching effect through its cohesive forces and ability to penetrate filter media, while avoiding the damaging high-pressure impact characteristics of air injection. This parameter change resolves the contradiction by maintaining cleaning effectiveness without compromising filter integrity and lifespan.
2Object-generated harmful factors
If high-pressure air injection is used during backwashing to remove adhered materials, then the detaching effect is improved, but filter cloth tearing occurs
Solution Approach 1:
The invention changes the physical state parameter of the backwashing medium from gas (air) to liquid (water). Water's liquid state allows it to apply cleaning forces more gradually and uniformly across the filter cloth surface, preventing the sudden impact forces that cause tearing. This parameter change maintains the detaching effect while preserving filter cloth strength and integrity.
3Object-generated harmful factors
If high-pressure air injection is used during backwashing to remove adhered materials, then the detaching effect is improved, but filter media loss occurs
Solution Approach 1:
The invention changes the backwashing medium from air to water, which fundamentally alters how adhered materials are removed. Water's liquid properties enable it to dissolve and flush away filter media and contaminants more gently, preventing the violent dislodgement and loss of filter media that occurs with high-pressure air injection. This parameter change reduces substance loss while maintaining effective cleaning.
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 improves filtration efficiency and extends filter life by effectively detaching adhered materials through rotational force and high-pressure backwashing, preventing filter damage and maintaining filtration performance.
Implementation Method 1
a filter rotation unit for detaching foreign materials adhered to the pre-coating filter by applying a rotational force to the filter coupling plate body and shaking the pre-coating filter
Implementation Method 2
high-pressure backwashing water and air injection to effectively remove filter media and foreign materials
Data Source
AI summary
A pre-coating filter device includes: a filtration tank comprising a raw water inlet through which raw water flows on one side, and a drain port at the bottom; a top cover coupled to the upper part of the filtration tank and comprising a coupling hole through the middle part; a purified water discharge pipe coupled to the coupling hole of the top cover; a purified water storage space unit coupled to the lower part of the top cover and located within the filtration tank, and comprising a communication pipe connected to the central part; a filter coupling plate body coupled to the lower part of the purified water storage space unit and comprising a plurality of coupling holes through; and a pre-coating filter coupled to the coupling hole of the filter coupling plate body.