Fiber Filtering Apparatus With Inverted Drainage

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Fiber filters used in wastewater filtration face issues with fiber aggregation and reduced performance due to incomplete backwashing, leading to increased filtration resistance and frequent replacement needs.

Innovation Solution

A fiber filtering apparatus with a multi-layered structure, including an upper and lower box with separate piping systems for backwashing and filtration, utilizing distinct backwashing modes and air introduction to ensure complete drainage of backwashing water and prevent residue accumulation, along with a controller for pollution measurement and adaptive backwashing control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If backwashing water is drained through the upper part of the body, then the backwashing process can be performed, but the backwashing water is not fully drained and residue remains in the body

Engineering Contradiction:

Improvebackwashing completenessVSAvoidresidue accumulation

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent inverts the drainage direction by introducing a drainage hole in the lower part of the container instead of the upper part. This allows backwashing water to drain downward through the bottom, ensuring complete drainage and preventing residue accumulation that would occur with upward drainage through the upper part.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If residue is accumulated continuously, then the backwashing process can be performed, but the fibers tend to be agglomerated and cracked to deteriorate the performance

Engineering Contradiction:

Improvefiber performanceVSAvoidfiber aggregation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

By inverting the drainage hole position to the lower part of the container, the patent enables complete drainage of backwashing water, preventing residue accumulation that would otherwise cause fiber aggregation and cracking, thereby maintaining fiber performance.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent converts the potentially harmful effect of residue accumulation into a beneficial complete drainage system. By positioning the drainage hole at the bottom, the design ensures that all backwashing water is completely drained, transforming what would be a harmful residue problem into a beneficial complete wash cycle.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If the filtration process is continued, then the filtration can be performed, but the pores in the filtering layer are gradually filled with suspended solids and filtration resistance is increased

Engineering Contradiction:

Improvefiltration continuityVSAvoidfiltration resistance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements preliminary backwashing action before the filtration resistance becomes excessive. By enabling complete backwashing drainage through the lower drainage hole, the system can regularly remove accumulated suspended solids from the filtering layer pores, preventing excessive resistance buildup and maintaining continuous filtration productivity.

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 solution effectively suppresses fiber aggregation, maintains filtration performance, and extends the lifespan of fiber filters by ensuring complete backwashing and reducing residue accumulation, thereby enhancing cost efficiency.

Implementation Method 1

air is introduced through an air portion 60 as soon as backwashing water is introduced through the backwashing water inlet 50

Methodology Applied

Scientific EffectAir introduction:

Implementation Method 2

a process of detaining and trapping the suspended solids in the raw water in pores in the filtering layer of the filtering apparatus

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentUS11000787B2Fiber filtering apparatus

Publication Date: 2021.05.11 DOOSAN HEAVY IND & CONSTR CO LTD

AI summary

A fiber filtering apparatus includes: an enclosure including an upper box and a lower box communicating with the upper box; a strainer installed in the upper box along a longitudinal direction; a plurality of fiber yarn media configured to be fixed to upper and lower fixing means each coupled to upper and lower parts of the strainer; a plurality of fiber ball media configured to be embedded in the lower box to form a second filtering layer; a first pipe configured to be formed on one side wall on the lower part of the upper box and introduced with raw water during filtration and drain backwashing water during backwashing; and a second pipe formed on one side wall on a lower part of the lower box and drain filtered water during the filtration and introduced with washing water during the backwashing.