Ceramic Disk Filter with Sodium Polyphosphate Inhibitor
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Solution Overview
Problem
Water treatment systems face challenges in preventing scale formation in pipes due to high concentrations of nitrogen, phosphorus, calcium, and magnesium in raw water, leading to frequent replacements of pipes and pumps, despite the use of materials like PVDF or PVC.
Innovation Solution
A disk filter system incorporating a ceramic filter and a scale formation inhibitor, such as sodium polyphosphate, is used to prevent scale formation by removing scale-inducing materials from raw water, which is then discharged through a flow channel within the filter, and the system includes a loss prevention plate to retain the inhibitor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PVDF or PVC material is used for pipes and pumps, then the rate of scale formation is decreased, but the pipes and pumps still require periodic replacement due to scale formation
Solution Approach 1:
The patent applies preliminary action by introducing a scale formation inhibitor (such as sodium polyphosphate) into the water treatment process before the water enters the pipes. This preventive measure removes scale-inducing materials (calcium, magnesium) from the raw water, preventing scale formation in advance and eliminating the need for periodic pipe replacement
Solution Approach 2:
The patent extracts the harmful scale-inducing materials (calcium, magnesium ions) from the raw water using a disk filter with ceramic filtering elements and chemical inhibition. By removing these substances before they enter the piping system, the patent prevents scale formation without requiring special pipe materials or periodic replacements
2Reliability
If ceramic filter and scale formation inhibitor are used, then scale formation is prevented and backwashing is facilitated, but the device structure becomes more complex
Solution Approach 1:
The patent merges multiple functions into a single integrated disk filter unit. The ceramic filtering elements and scale formation inhibitor work together in one device to simultaneously filter particles and prevent scale formation, eliminating the need for separate filtration and scale prevention systems
Solution Approach 2:
The disk filter with ceramic elements serves multiple functions: it acts as a physical filter for particle removal, a chemical treatment medium for scale prevention through inhibitor loading, and a backwashable component for continuous operation. This multi-functionality reduces overall system complexity despite the advanced technology used
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 disk filter effectively prevents scale formation in water treatment apparatus pipes, reducing the need for frequent replacements and ensuring continuous operation by using a ceramic filter and sodium polyphosphate balls to remove calcium and magnesium, thereby preventing struvite formation.
Implementation Method 1
raw water introduced via the raw water inlet passes through the ceramic filter
Implementation Method 2
a scale formation inhibitor loaded in a flow channel formed inside the ceramic filter
Data Source
AI summary
The system relates to a disk filter for effectively preventing scale formation in a water treatment process, and to a water treatment apparatus and method using the same. The disk filter includes a housing having a cylindrical shape, a raw water inlet formed at a predetermined position on the side surface of the housing, a raw water outlet formed at a central region in the bottom of the housing, a backwash water outlet formed at a central region in the top of the housing, a ceramic filter provided in a circular disk shape inside the housing, and a scale formation inhibitor loaded in a flow channel formed inside the ceramic filter, wherein raw water introduced via the raw water inlet passes through the ceramic filter and then through the flow channel filled with the scale formation inhibitor, and is then discharged via the raw water outlet.