Solubles Reduction for PACT-WAR Water Treatment
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Solution Overview
Problem
Water treatment systems utilizing powdered activated carbon face challenges with scaling and corrosion due to soluble components like calcium, magnesium, and chlorides, leading to high maintenance and material costs in wet air regeneration systems.
Innovation Solution
A solubles concentration reduction apparatus is introduced between the powdered activated carbon treatment and wet air regeneration systems, using a dewatering device to remove excess water and undesirable components, followed by re-slurrying with demineralized water to create a sludge with optimized solids content for reduced scaling and corrosion, allowing the use of less expensive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If spent carbon from PACT system is directly fed to WAR system, then treatment process is simple, but scaling and corrosion occur due to soluble components
Solution Approach 1:
The patent applies preliminary action by introducing a solubles concentration reduction step before the WAR system. A dewatering device removes water and soluble components from spent carbon sludge before regeneration, preventing scaling and corrosion in downstream equipment while maintaining process simplicity
2Object-affected harmful factors
If solubles concentration reduction apparatus is added, then scaling and corrosion are reduced, but device complexity increases
Solution Approach 1:
The patent uses an intermediary approach by introducing a dewatering device as a intermediate treatment step. This device concentrates solids and removes soluble components, acting as a mediator between the PACT and WAR systems to reduce harmful effects without requiring complete system redesign
3Reliability
If expensive corrosion-resistant materials are used, then system reliability is improved, but construction cost increases
Solution Approach 1:
The patent converts the harmful effect of soluble components into a benefit by using them as indicators for pretreatment needs. The dewatering device exploits the presence of these components to drive concentration reduction, thereby protecting equipment and enabling use of less expensive materials while maintaining reliability
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
This approach significantly reduces maintenance costs and allows the use of less expensive materials in the wet air regeneration system, enhancing reliability and operational efficiency by minimizing scaling and corrosion issues.
Implementation Method 1
a dewatering device to remove water and at least one undesirable soluble component from the spent carbon
Implementation Method 2
Wet air regeneration (WAR) systems utilize high temperature and pressure conditions for regenerating spent carbon from PACT systems while simultaneously oxidizing the biological solids accompanying the spent carbon
Data Source
AI summary
A water treatment system (100) incorporating a solubles concentration reduction device (104) between a powdered activated carbon treatment (PACT) system (106) and a wet air regeneration (WAR) system (108). Soluble components may be removed by sequentially dewatering (20) then re-slurrying (28) spent carbon sludge (18). The reduced concentration of soluble materials reduces the need for scale removal maintenance and eliminates the necessity for exotic materials of construction of the WAR system components. The solubles concentration reduction device also facilitates active control of the solids concentration being delivered to the WAR system.