Chemical Feeder Dilution Control for Concentration Precision
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Solution Overview
Problem
Existing chemical feeders struggle to produce chemical solutions with predictable and adjustable concentrations, often resulting in either high or low concentrations that are not suitable for various water treatment applications, leading to system fouling and maintenance issues.
Innovation Solution
A chemical feeder with a dilution control device that includes a manually operated bypass line and a spray manifold, allowing water to be sprayed in opposite directions to mix with dissolved chemicals, enabling adjustable water pressure to achieve consistent chemical solution strengths by varying the ratio of water pressure from the manifold and dilution control device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an intermittent spray system is used to create high concentration chemical solution, then the chemical dissolution rate is improved, but the concentration control precision deteriorates and system fouling increases
Solution Approach 1:
The spray system is segmented into multiple nozzles arranged in a circular pattern, with each nozzle contributing to the overall dissolution process. This segmentation allows for more uniform chemical exposure and better concentration control while maintaining high dissolution rates.
Solution Approach 2:
The system uses an intermittent spray pattern that dynamically alternates between spraying and non-spraying phases. This dynamic operation enables precise control over the chemical dissolution rate and final concentration, preventing both over-dissolution and under-dissolution while reducing fouling.
2Productivity
If water spray is directed upward toward solid chemical, then the chemical dissolution is enhanced, but the concentration becomes unpredictable and varying
Solution Approach 1:
The nozzles are arranged in a circular pattern equidistant from the central solid chemical source, creating equipotential spray coverage. This ensures uniform water distribution across the chemical surface, leading to predictable and consistent dissolution rates and final concentrations.
Solution Approach 2:
Each nozzle is positioned to target a specific local area of the solid chemical, creating zones of controlled dissolution. The combination of multiple localized spray zones results in uniform overall dissolution with predictable concentration outcomes.
3Productivity
If high concentration chemical solution is produced, then the chemical feeder efficiency is improved, but the application versatility deteriorates
Solution Approach 1:
The system can adjust operational parameters such as spray duration, spray intensity, and water flow rate to produce chemical solutions at different concentrations. This parameter flexibility allows the same feeder to efficiently serve multiple applications ranging from high-concentration industrial processes to low-concentration municipal water treatment.
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
Enables the production of chemical solutions with widely selectable concentrations, reducing maintenance needs and expanding the feeder's applicability across different water treatment applications, such as spa facilities and drinking water plants.
Implementation Method 1
solid chemicals are held in a hopper of the feeder and the chemicals are dissolved by directing an intermittent spray of pressurized water toward the solid chemicals
Implementation Method 2
The water spray from the manifold and the water spray from the dilution control device mix with the dissolved chemical in the bottom of the unit to create a chemical solution with a concentration that has widely selectable strength
Implementation Method 3
directing an intermittent spray of pressurized water toward the solid chemicals
Data Source
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AI summary
A chemical feeder for producing a solution of dissolved chemical material that includes a hopper (16), a pump unit (12), a water supply line that extends from the pump unit (12), a chemical solution preparation unit (14) that has a feeder reservoir (66) and a dissolution device and a dilution control device (26) that are each connected to the water supply line. The dissolution device has a spray manifold (24) to spray water towards the hopper (16) that contains solid chemicals to contact and dissolve the chemical material. The dilution control device (26) sprays water in a direction opposite the spray manifold (24) and into the reservoir (66) to aid in adjusting the concentration of a chemical solution and to arrive at a desired chemical concentration range. Thus, the dilution control device allows the chemical feeder to be used for a wide range of concentrations in a wide range of applications.