Ion Exchange Resin Replacement Control in UPW Polishers
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Solution Overview
Problem
Manual operations during the replacement of ion exchange resins in ultrapure water production facilities lead to errors, affecting the quality of treated water.
Innovation Solution
An ultrapure water production facility with automatic valves and a systematic method for replacing ion exchange resins, including controlled draining, cleaning, and preparation processes to minimize human error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation is used for replacing ion exchange resin, then ease of operation is improved, but reliability deteriorates due to human errors
Solution Approach 1:
The system performs self-service through automated valve operations that execute the resin replacement process without human intervention. The control device automatically opens and closes valves in sequence, allowing the system to replace resin while maintaining reliability through automation rather than manual operation.
Solution Approach 2:
The patent replaces manual mechanical operations with an automated control system. The control device substitutes human operators by automatically controlling multiple valves through electrical or electronic signals, thereby eliminating human errors while maintaining operational capability.
2Reliability
If automated valves are used for resin replacement, then reliability is improved by reducing human errors, but device complexity increases
Solution Approach 1:
The control device serves multiple functions: it controls inflow valves, outflow valves, and drain valves through a single automated system. This multi-functionality reduces the need for separate control mechanisms for each valve, thereby managing complexity while improving reliability through consistent automated operation.
Solution Approach 2:
The patent merges the control of multiple valves into a single automated control device. Instead of having independent manual controls for each valve, the system combines them under one control device that manages the sequence of operations, simplifying the overall control architecture while enhancing reliability.
3Manufacturing precision
If multiple drain lines and valves are implemented, then manufacturing precision is improved for controlled draining, but device complexity increases
Solution Approach 1:
The draining system is segmented into multiple drain lines (first drain line, second drain line) with dedicated valves for each. This segmentation allows precise control over different draining stages and pathways, enabling manufacturing precision in the resin replacement process while managing complexity through modular design.
Solution Approach 2:
The system performs preliminary draining actions through the first drain line before the main replacement process. This preliminary action prepares the system for subsequent operations by removing excess water or contaminants in advance, ensuring precision in the overall resin replacement process.
Data Source
AI summary
An ultrapure water (UPW) production facility includes a polisher filled with an ion exchange resin, an inflow line, an inflow valve connected to the inflow line and upstream of the polisher, an outflow line, an outflow valve connected to the outflow line and downstream of the polisher, a first drain line connected to the polisher, a first drain valve connected to the first drain line and downstream of the polisher, a second drain line branched from the outflow line, a second drain valve connected to the second drain line, a discharge line branched from the second drain line, a discharge valve connected to the discharge line, wherein the inflow valve, the outflow valve, the first drain valve, the second drain valve, and the outflow valve are automatic valves.