Chlorine Demand Metering System With Buffer Tank
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Solution Overview
Problem
Current chlorine demand meters in water treatment systems are inaccurate due to unstable flow rates and inaccessible calibration, leading to incorrect chlorine dosage and inefficiency in disinfection processes, particularly with industrial hypochlorite solutions losing strength over time.
Innovation Solution
A system comprising a tank, buffer tank, mixing tank, and chlorine measuring devices to form a composite solution, with a pump and regulators controlling the flow of sodium hypochlorite, allowing for continuous monitoring and adjustment of chlorine levels to maintain optimal water quality and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chlorine demand meters are installed in water treatment systems, then chlorine dosage can be determined, but the meters become inaccessible for calibration and maintenance
Solution Approach 1:
The system divides the chlorine demand determination process into separate functional modules: a flow cell for measurement, a buffer tank for solution storage, and a mixing chamber for composite solution creation. This segmentation allows the measurement component to remain accessible while maintaining system functionality.
Solution Approach 2:
The patent introduces an intermediary buffer tank and mixing chamber system that decouples the measurement process from the main water flow. This intermediary setup allows calibration access without disrupting the primary water treatment function.
2Reliability
If industrial hypochlorite solutions are used for disinfection, then chlorine demand can be met, but the solutions lose strength over time leading to inaccurate measurements
Solution Approach 1:
The system performs preliminary preparation of hypochlorite solutions in a buffer tank before measurement, allowing for fresh solution preparation and reducing the impact of strength loss over time. This preliminary action ensures accurate baseline measurements.
Solution Approach 2:
The patent implements continuous monitoring and adjustment of chlorine concentration parameters, adapting to changes in hypochlorite strength over time. This dynamic parameter adjustment maintains measurement precision despite solution degradation.
3Productivity
If flow rates of treated water and disinfectant chemicals are increased, then treatment productivity improves, but flow instability increases leading to measurement errors
Solution Approach 1:
The system maintains continuous flow through the measurement cell with laminar flow conditions, ensuring stable and consistent measurements even at higher throughput rates. This continuous stable action reconciles productivity with measurement precision.
Solution Approach 2:
The patent employs hydraulic principles to create a controlled flow environment in the measurement cell, using pressure differentials and flow restriction elements to maintain laminar flow conditions that are insensitive to upstream flow variations.
Data Source
AI summary
The system for determining chlorine demand in water includes a reagent supply tank configured for holding a solution of sodium hypochlorite of known concentration, a buffer tank positioned in fluid communication with the reagent supply tank, the buffer tank including a first conduit configured for transferring the solution from the reagent supply tank into the buffer tank, and a mixing tank positioned in fluid communication with the buffer tank, the mixing tank including a second conduit configured for transferring the solution from the buffer tank into the mixing tank to form a composite solution. The system further includes a first chlorine measuring device for measuring the free chlorine residual in a water source connected to the mixing tank, a second chlorine measuring device configured for measuring the free chlorine residual in the composite solution, and a pump operatively coupled to the water source.