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A method and device for quantitatively measuring cavitation strength in clear water or sandy water

A quantitative measurement and clear water technology, which is applied in the field of analysis and testing, can solve the problems affecting the accuracy of the experiment, and achieve the effect of simple test equipment, high sensitivity and precision, and short cycle time

Active Publication Date: 2022-05-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the liquid contains sediment or impurities, the generated elemental iodine will be absorbed by solid particles, which will seriously affect the accuracy of the experiment

Method used

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  • A method and device for quantitatively measuring cavitation strength in clear water or sandy water
  • A method and device for quantitatively measuring cavitation strength in clear water or sandy water
  • A method and device for quantitatively measuring cavitation strength in clear water or sandy water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Prepare FeSO with a concentration of 10mmol / L 4 The solution is 500mL, and the concentration of dilute sulfuric acid in the solution is ≥5mmol / L.

[0045] (2) Transfer all the prepared solutions into the Erlenmeyer flask, and install the test device.

[0046] (3) Turn on the ultrasonic and stirring devices and start timing at the same time. After 30 minutes, take the solution supernatant in the conical flask and add it to a quartz cuvette to measure the absorbance at the incident light wavelength of 300 nm. The result is 0.358.

[0047] As a control, 500 mL of FeSO with a concentration of 7.5, 5.0, and 2.5 mmol / L were prepared respectively. 4 Solution is tested and compared with Example 1, the results are as follows figure 2 shown. From figure 2 It can be concluded that in the wavelength range of 190nm-400nm, with FeSO 4 As the concentration of the solution decreases, the absorbance also gradually decreases; the absorbance changes greatly in the wavelength ra...

Embodiment 2

[0050] (1) Prepare FeSO with a concentration of 10mmol / L 4 The solution is 500mL, and the concentration of dilute sulfuric acid in the solution is ≥5mmol / L.

[0051] (2) Transfer all the prepared solution to the Erlenmeyer flask. Weigh 1.0 g of quartz sand particles with a particle size of 40-60 μm, and add it into the Erlenmeyer flask so that the sand content of the solution is 2.0 g / L. Then install and fix the test device.

[0052] (3) Turn on the ultrasonic and stirring devices and start timing at the same time. After 30 minutes, take the solution supernatant in the conical flask and add it to a quartz cuvette to measure the absorbance at 300nm incident light wavelength, and the result is 0.670.

Embodiment 3

[0054] (1) Prepare FeSO with a concentration of 10mmol / L 4 The solution is 500mL, and the concentration of dilute sulfuric acid in the solution is ≥5mmol / L.

[0055] (2) Transfer all the prepared solution to the Erlenmeyer flask. Weigh 2.0 g of quartz sand particles with a particle size of 40-60 μm, and add it into the Erlenmeyer flask so that the sand content of the solution is 4.0 g / L. Then install and fix the test device.

[0056] (3) Turn on the ultrasonic and stirring devices and start timing at the same time. After 30 minutes, take the supernatant of the solution in the conical flask, add it to a quartz cuvette and measure the absorbance at 300nm incident light wavelength, and the result is 0.714.

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Abstract

The invention relates to a method and a device for quantitatively measuring cavitation strength in clear water or sandy water. The scheme utilizes FeSO 4 Capture OH and Fe produced by cavitation in water 2+ oxidized to Fe 3+ , under certain conditions · OH concentration and Fe 3+ The concentration has a positive response relationship, and the absorbance of the solution is related to the Fe 3+ The concentration satisfies Lambert-Beer's law, and detecting the absorbance in the solution can quantitatively characterize the cavitation intensity of clear water or sandy water. The method and device provided by the invention can not only quantitatively measure the cavitation intensity in clear water, but also quantitatively measure the cavitation intensity in sandy water, and the agitating device provided can prevent sedimentation during the test and ensure that the reaction is fully carried out. Compared with the existing similar methods, the method of the present invention has many advantages such as high sensitivity, good accuracy, simplicity and ease of operation.

Description

technical field [0001] The invention relates to the technical field of analysis and testing, in particular to a method and device for quantitatively measuring cavitation strength in clear water or sandy water. Background technique [0002] Cavitation erosion effect is an important cause of serious damage to hydraulic machinery, and quantitative evaluation of cavitation erosion intensity has always been a hot issue in the academic community. Due to the instantaneous, random, and microscopic characteristics of cavitation phenomena, it has always been a difficult point in the study of cavitation erosion to seek a method that can accurately quantify the cavitation intensity in water, and then quantitatively measure the cavitation intensity in water. [0003] At present, there are many methods for evaluating cavitation intensity, including noise method, sound pressure method, vibration method, aluminum foil corrosion method, electrochemical method, iodine release method, etc. de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33G01N21/01G01N1/38
CPCG01N21/33G01N21/01G01N1/38
Inventor 谢华秦鑫林振兴
Owner WUHAN UNIV
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