Parallel Water Softening Tanks with Flow-Based Segmentation
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Solution Overview
Problem
Commercial water softening systems face issues with uneven water distribution and channeling when water flow rates are low, leading to untreated water passing through the system due to the design of multiple tanks handling the same 'trip' level of water flow.
Innovation Solution
A water softening system that dynamically directs water flow into larger or smaller treatment tanks based on flow rates, using a controller with 'high' and 'low' trip points to manage water distribution efficiently and prevent channeling, with multiple sized tanks connected in parallel and equipped with flow meters to monitor and adjust water flow accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple tanks of the same size are used to handle larger water volume, then the system can serve high water demand, but channeling occurs at low flow rates causing uneven water distribution
Solution Approach 1:
The system segments the water treatment capacity by providing multiple tanks of different sizes (first tank with first capacity, second tank with second capacity). The controller divides the water flow demand across these segmented tanks based on flow rate, directing high flow to larger tanks and low flow to smaller tanks, thus preventing channeling while maintaining high productivity capacity.
Solution Approach 2:
The system dynamically adjusts tank selection based on real-time flow rate conditions. The controller continuously monitors water flow demand and switches between different tank configurations (first tank for high flow, second tank for low flow), making the system adaptable to varying demand conditions and preventing channeling at low flows.
2Productivity
If multiple tanks handle the same trip level flow rate, then system capacity is maximized, but resin utilization becomes uneven leading to untreated water passage
Solution Approach 1:
The system applies local quality by assigning different tank sizes to different flow rate conditions. The smaller tank is optimized for low flow rates where uniform resin utilization is critical, while larger tanks handle high flow rates. This localized optimization ensures that each tank operates in its optimal flow range, maintaining uniform resin utilization and preventing untreated water passage.
Solution Approach 2:
The system changes the operating parameters (flow rate, tank selection) based on demand conditions. By monitoring flow rate and switching between tanks of different capacities, the system maintains optimal flow velocity through the resin bed, ensuring uniform resin utilization across all operating conditions and preventing channeling.
3Device complexity
If a single tank size is used for all flow rates, then system design is simplified, but channeling occurs at low flow rates extending resin exhaustion
Solution Approach 1:
The system segments the tank population into different size categories (first tank with first capacity, second tank with second capacity). This segmentation allows the system to match tank size to flow rate, preventing channeling at low flows while maintaining simplified operation through automated controller management of the multiple tanks.
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 system effectively manages water flow rates, preventing channeling and ensuring all resin in the treatment tanks is utilized, thereby maintaining water quality and extending the life of the ion exchange resin by directing water to appropriate-sized tanks based on demand, minimizing untreated water passage.
Implementation Method 1
Water softening occurs by running water through the ion exchange resin, which replaces the calcium and magnesium cations in the water with sodium cations
Implementation Method 2
A flow meter in communication with the controller measures the flow rate of the water
Data Source
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AI summary
A water softening system (20) including a first treatment tank (24) having a first water capacity, a second treatment tank (26) in parallel with the first treatment tank (24) and having a second water capacity that is less than the first water capacity, a flow meter (74) connected to the first and second treatment tanks (24,26), the flow meter (74) configured to determine a demand flow rate of water entering the system (20) and a controller (70) in communication with the flow meter (74), the controller (70) configured to direct the water into the first treatment tank (24) when the demand flow rate is greater than a designated flow rate, and to direct the water into the second treatment tank (26) when the demand flow rate is equal to or less than the designated flow rate.