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Method for judging scaling and anti-scaling characteristic

A scaling and performance technology, applied in the direction of material electrochemical variables, can solve the problems of large test equipment, long test cycle, and complexity, etc., and achieve the effect of simple evaluation method, high resolution and reliability, and shortened time

Inactive Publication Date: 2005-01-05
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its test equipment and instruments are also the largest and most complicated, the workload of the test is heavy, and the test period is the longest. A test under one condition must last for at least 15 days
The amount of test water required by this method is also very large. One test of one condition requires several tons of water. The collection, shipment and storage of so much water are also difficult for ordinary laboratories.
Obviously, it is unrealistic to use this method to screen and compound a large number of water treatment agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In Example 1, the scaling performance of two test water samples was evaluated.

[0046] Made of stainless steel, the exposed fouling area is 9cm 2 Working electrode. Weigh the working electrode with the analytical method. Test water sample one is prepared water, Ca 2+=240mg / L, HCO 3 - =732mg / L; The second test water sample is the cooling water of Shandong S Power Plant, Ca 2+ =90mg / L, HCO 3 - =250mg / L. Put the working electrode into the test water sample for cathodic polarization for 2 hours, constant potential -1.0V (SCE), temperature 40°C. After polarization, take out the working electrode, dry the electrode by a suitable method, and then weigh the working electrode with the analytical Taiping. In order to determine the reproducibility of the method, repeated experiments were carried out. The test results are shown in Table 1.

[0047] Water quality

[0048] It can be seen from Table 1 that the scale of test water sample 1 is much higher than that of test wate...

Embodiment 2

[0049] In Example 2, the scale inhibition performance of two water treatment agents was evaluated.

[0050] Made of stainless steel, the exposed fouling area is 9cm 2 Working electrode. Weigh the working electrode with the analytical method. Add water treatment agent A5mg / l to test water sample one to prepare test water sample three. Add water treatment agent B5mg / l to test water sample one to prepare test water sample four. Put the working electrode into the test water sample for cathodic polarization for 2 hours, constant potential -1.0V (SCE), temperature 40°C. After polarization, take out the working electrode, dry the electrode by a suitable method, and then weigh the working electrode with the analytical Taiping. The test results are shown in Table 1.

[0051] Water quality

[0052] It can be seen from Table 2 that the scale inhibition performance of water treatment agent A is higher than that of water treatment agent B.

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Abstract

The invention relates to a method for estimating the water system fouling performance and water processing agent anti-fouling performance. The steps are: 1) the water system uses the metal material in heat exchanger to produce the working electrode for exploring fouling area; 2) measures the weight or thickness of the working electrode; 3) uses the real water or confected water as the testing sample; 4) the working electrode is put into the testing sample to be polarized negatively; 5) takes out the working electrode, then measures the weight or thickness of the working electrode; 6) works out the weight difference or the thickness difference before and after the polarization, in order to estimate the fouling performance of the metal material or the anti-fouling performance of the water processing agent. The invention uses the negative electrode polarization method to produce the metal material into working electrode to be fouled in the water sample, then uses the fouling quantity of the working electrode to estimate the fouling performance or the anti-fouling performance of the water processing agent.

Description

Technical field [0001] The invention relates to a method for evaluating the scaling performance of a water system and the scaling inhibition performance of a water treatment agent. Background technique [0002] In water systems, such as boilers, plumbing, and cooling water systems, scaling is widespread. Especially with the increasing shortage of water resources in the cooling water system, in order to save water and rational water use, the concentration rate of cooling water has been continuously increased, and the contradictions of scaling, corrosion and biological hazards have become increasingly prominent. The application of various water treatment agents is also increasing. In order to prevent scaling, it is necessary to evaluate the scale inhibition performance of the water treatment agent and the scaling performance of the water and heat exchanger metal materials in the water system. [0003] The existing technology to evaluate the scaling and anti-scaling performance usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/42
Inventor 梁磊余乐书
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER