Scale Inhibitor Evaluation Device Using Stirrer and Condenser
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Solution Overview
Problem
Current methods for evaluating scale inhibitors in circulating cooling water systems are either overly complex and time-consuming or unable to accurately reflect the dispersion and lattice distortion of scale inhibitors, as they do not simulate real-world conditions effectively.
Innovation Solution
A device and method utilizing an electronic stirrer to create a water flow over a metal test piece at constant temperature, measuring stable calcium ion concentration and increased weight to evaluate scale inhibitor performance, combining the advantages of static and dynamic methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the dynamic method is used to simulate working conditions in the laboratory, then the evaluation can effectively reflect scale formation, but the test becomes complicated and time-consuming (longer than ten days)
Solution Approach 1:
The patent extracts the essential dynamic flow condition from the complex dynamic method by using a simple stirrer to create circulation. This isolates the critical parameter (fluid motion) while eliminating unnecessary complexity, achieving dynamic evaluation in a simplified setup that completes in hours rather than days
Solution Approach 2:
The evaluation process is segmented into distinct measurement components: calcium ion concentration measurement for chelation ability, and weight measurement for dispersion and lattice distortion ability. This allows parallel processing of different evaluation aspects, reducing overall test time while maintaining comprehensive assessment
2Measurement precision
If the dynamic method is used to simulate working conditions, then scale formation can be reflected, but the adapted device becomes complicated and expensive
Solution Approach 1:
The stirrer serves multiple functions: it creates fluid circulation to simulate dynamic conditions, mixes the test solution uniformly, and generates flow over the test piece surface. This single component replaces what would otherwise require multiple specialized devices, simplifying the overall apparatus while maintaining evaluation accuracy
Solution Approach 2:
The test piece itself serves as both the substrate for scale formation and the measurement object. By measuring the weight increase of the test piece directly, the system eliminates the need for separate collection and measurement apparatus, reducing device complexity while enabling direct quantification of scale deposition
3Measurement precision
If static methods are used to evaluate scale inhibitors, then chelation and calcium ion stabilization can be reflected, but dispersion and lattice distortion cannot be reflected
Solution Approach 1:
The patent combines static measurement techniques (calcium ion concentration analysis) with dynamic flow conditions (stirrer-induced circulation) in a single evaluation system. This merger allows simultaneous assessment of chelation ability (through concentration measurement) and surface-related properties (through weight measurement under flow), achieving comprehensive evaluation that neither static nor traditional dynamic methods could provide alone
Data Source
AI summary
A device for evaluating a scale inhibitor for a circulating cooling water system, the device including: an open vessel, the open vessel including a first fixing hole, a second fixing hole, and at least one test hole; a stirrer; a test piece; a condenser; and a constant temperature heater. The open vessel is disposed inside the constant temperature heater. The first fixing hole is used to fix the stirrer. The second fixing hole is used to fix the condenser. The test hole is used to fix the test piece.