Chemical Delivery Manifold Feedback Control for Precise Dilution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dilution control systems for chemicals face challenges in accurately maintaining intended dilution rates due to variability in metering device performance over time and across different models, leading to discrepancies between intended and actual dilution rates.
Innovation Solution
A chemical delivery system with a control unit, flow rate sensors, and adjustable metering devices that monitor and adjust the flow rate of concentrated chemicals in real-time, using eductors and valves to ensure precise dilution control by adjusting the rate of dispensing and orifice size based on measured flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional metering devices are used without real-time monitoring, then the system is simpler and easier to operate, but the dilution rate accuracy deteriorates due to variability in metering device performance
Solution Approach 1:
The system implements real-time feedback by monitoring the actual flow rate of concentrated chemical with a flow rate sensor and comparing it to the intended flow rate. The control unit processes this feedback information and automatically adjusts the metering device to maintain accurate dilution rates, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The system replaces manual mechanical metering adjustment with automated electronic control. The control unit electronically adjusts the metering device based on flow rate sensor feedback, substituting mechanical manual operation with an automated control system that improves precision without requiring complex manual adjustments.
2Reliability
If manual adjustment of metering devices is used, then the system is easier to operate, but the consistency and reliability of dilution rates deteriorate over time
Solution Approach 1:
The system performs self-adjustment by automatically monitoring flow rates and correcting deviations without human intervention. The control unit continuously adjusts the metering device to maintain consistent dilution rates, making the system self-correcting and reliable over time while reducing the need for manual operation and monitoring.
Solution Approach 2:
Real-time feedback from flow rate sensors enables the system to detect and correct deviations from intended dilution rates automatically. This continuous monitoring and adjustment loop ensures consistent and reliable operation over time, eliminating the degradation that occurs with manual adjustment while maintaining ease of operation through automation.
3Manufacturing precision
If individual control of each concentrated chemical is implemented, then the dilution control precision is improved, but the device complexity increases due to multiple sensors and control mechanisms
Solution Approach 1:
The system divides the chemical delivery into separate controlled channels, with each concentrated chemical having its own flow rate sensor and control mechanism. This segmentation allows individual precision control of each chemical's dilution rate while maintaining overall system organization through modular architecture, resolving the contradiction between control precision and complexity.
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 accurate and individual control of dilution rates for each chemical, ensuring consistent delivery of mixed solutions to application areas, improving precision and reliability in agricultural, horticultural, and industrial applications.
Implementation Method 1
the plurality of eductors may configured as venturi eductors, such that the concentrated chemical is drawn through the concentrated chemical inlet by the venturi effect
Data Source
AI summary
A chemical delivery system with dilution control includes a chemical delivery manifold with eductors each fluidly coupled to a valve configured to operate independently to selectively control flow of a motive fluid through a respective eductor. Metering devices are coupled to concentrated chemical lines and configured to control a rate of dispensing of the concentrated chemical passing therethrough to each of the eductors. Concentrated chemical flow rate sensors are coupled to each of these individual concentrated chemical lines and configured to measure a flow rate of the concentrated chemicals therethrough. A control unit receives a measured flow rate from each flow rate sensor and causes a respective metering device to adjust the rate of dispensing for one or more concentrated chemicals to control the flow rates of the concentrated chemicals and thereby individually control a dilution of each concentrated chemical in the motive fluid.