Electrode cleaning method of large-diameter electromagnetic flowmeter

Abstract: The information on the electrode cleaning method of the large-diameter electromagnetic flowmeter meter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Electrode cleaning methods for large-diameter electromagnetic flowmeters are as follows: 1. Electrochemical methods Electrochemical phenomena exist in metal electrodes in electrolyte fluids. According to the principle of electrochemistry, there is an interfacial electric field between the electrode and the fluid, and the interface between the electrode and the fluid is the electrode/fluid phase. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the article on the electrode cleaning method of large-diameter electromagnetic flowmeters. Electrode cleaning methods for large-diameter electromagnetic flowmeters are as follows: 1. Electrochemical method The metal electrode has electrochemical phenomena in the electrolyte fluid. According to the principle of electrochemistry, there is an interfacial electric field between the electrode and the fluid, and the interface between the electrode and the fluid is caused by the electric double layer existing between the electrode/fluid phase. The study of the electric field at the interface between the electrode and the fluid found that the molecules, atoms or ions of the substance have enriched or poor adsorption at the interface, and found that most inorganic anions are surface active substances with a typical ion adsorption law, while the surface of inorganic cations activity is small. Therefore, electrochemical cleaning of electrodes only considers the case of anion adsorption. The adsorption of anions is closely related to the electrode potential, and the adsorption mainly occurs in the potential range that is more positive than the zero-charge potential, that is, the electrode surface with the opposite sign. On the electrode surface of the same charge, when the residual charge density is slightly larger, the electrostatic repulsion is greater than the adsorption force, and the anions are quickly desorbed, which is the principle of electrochemical cleaning. 2. Mechanical removal method The mechanical removal method realizes electrode removal by installing a special mechanical structure on the electrode. There are currently two forms: one is to use a mechanical scraper. A scraper with a thin shaft is made of stainless steel, and the scraper is drawn out through a hollow electrode. A mechanical seal is used between the thin shaft and the hollow electrode to prevent the outflow of the medium, so a mechanical scraper is formed. When the thin shaft is rotated from the outside, the scraper rotates against the plane of the electrode end to scrape off the dirt. This scraper can be manually or automatically driven by a motor-driven thin shaft. The other is in the tubular electrode, which is equipped with a wire brush for removing dirt, and the shaft is wrapped in a sealed“O”ring to prevent fluid leakage. 3. Electric breakdown method This method uses alternating high-voltage electricity to be regularly added between the electrode and the medium, generally 30~100V. Because the electrode is attached, its surface contact resistance becomes larger, and the applied voltage is almost concentrated on the attached object. The high voltage will break down the attached object and then be washed away by the fluid. For overall safety, the use of electric breakdown method must be to clean the AC high voltage directly on the sensor signal output terminal when the flowmeter is interrupted for measurement, the signal line between the sensor and the converter is disconnected, and the power is cut off. 4. The ultrasonic cleaning method applies the ultrasonic voltage of 45~65kHz generated by the ultrasonic generator to the electrode, so that the energy of the ultrasonic wave is concentrated on the contact surface between the electrode and the medium, so as to use the ability of ultrasonic wave to crush the dirt and achieve the purpose of cleaning. The maintenance and cleaning methods of several large-diameter electromagnetic flowmeter electrodes have been introduced above. In fact, if we can fully consider that the measurement medium will pollute the electrodes in the early stage, we can easily maintain and clean the electrodes. Save a lot of trouble. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Large-caliber electromagnetic flow meter electrode cleaning method'
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