Application of electromagnetic flowmeter are introduced in detail

Abstract: this paper introduces the application of electromagnetic flow meter information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. The electromagnetic flowmeter applied widely. According to the application of large diameter, small diameter, small diameter and small diameter. Among them, the large diameter electromagnetic flowmeter is mainly used for water supply and drainage engineering, and medium and small diameter electromagnetic flowmeter is often used for solid liquid two phase, difficult to measure the fluid or requirements. More flow meter manufacturers choose model price quote you are welcome to inquire, here is introduced the application of electromagnetic flowmeter article details. The electromagnetic flowmeter applied widely. According to the application of large diameter, small diameter, small diameter and small diameter. Among them, the large diameter electromagnetic flowmeter is mainly used for water supply and drainage engineering, and medium and small diameter electromagnetic flowmeter is often used for solid liquid two phase, difficult to measure the fluid or demanding situations, such as papermaking industry to measure the pulp and black liquor, non-ferrous metallurgical industry measuring pulp, coal preparation plant, coal slurry highly corrosive liquid, chemical industry, steel industry blast furnace tuyere cooling water control, long-distance pipeline flow measurement and control of hydraulic transportation of coal, etc. And small diameter and a small diameter is commonly used to have health requirements, such as pharmaceutical industry, food industry and bioengineering. Electromagnetic flowmeter of the hybrid material in the liquid with bubble flow the tiny air bubbles can still work normally, but measured mixing volume flow containing bubble volume; If gas content increases, the formation of a slug flow, the circuit will be disconnected immediately, because the electrode may be covered by gas, the output will be shaking, and even can't work normally. Drilling mud, drilling mud and water, for example, the pulp is actually Newtonian fluid. Because of the solids in the fluid of the load flow together, containing the ferromagnetic particles or fiber solid-liquid two-phase fluid can also measure the volume of the two phase flow. High solid content of fluid. They have a gap between, speed, there are differences. Single-phase liquid calibration instrument used in solid-liquid two-phase fluid will generate additional error. Experimental lecture although there is no system to discuss the electromotive force of the influence of solid matter in solid-liquid two-phase fluid, but there are reports that abroad when solid matter content is 14%, the error is within 3%. According to the experiment of institute of science of the Yellow River water resources commission water in China, when measuring high sediment concentration water flow, sediment concentration of volume measurement error is less than 3%, and the median diameter of 0. 35 mm in low-frequency rectangular incentive of electromotive force, there will be noise peak of slurry, paste the larger particles will wipe to the electrode surface. To make the traffic signal is not stable, must choose the instrument or higher frequency noise suppression mud ability of the equipment, or ac excitation or double-frequency incentive instrument. There will be a measurement error. However, by the electromotive force of magnetic circuit of the magnetic flux detecting coil compensation can reduce the influence of ferromagnet. Shanghai guanghua instrument factory said in a speech in ac excitation device of the experiment, fe magnet is different of the measuring tube, fluid containing ferromagnetic material of common electromotive force will change too. Water contains iron concentrate slurry, liquid-solid ratio of 41 weight, size & le; 0. 15 mm. The contrast of clear water and pulp flow test, using 80 mm measuring tool usually display value of measuring tool change 7%, indicating the error in & plusmn; Within 2% fs. Pay attention to the degree of wear and tear sensor lining, and applied to pulp containing ore particles. When measuring tube diameter increase, will generate additional error. Here should be used to wear a good ceramic lining or polyurethane rubber lining. At the same time, it is recommended that the sensor device installed in vertical pipe runs, make the pipe wear uniform, eliminate the local wear in the second half of the defect level devices. Nozzle shape sheath can also be installed in the entrance end of the sensor, with relatively longer service life. If attached the conductivity is higher than the liquid of conductive material, measurement is easy to be attached liquid, and the precipitation on the pipe wall. Signal voltage will short out, unable to work. If it is not conductive layer, should first pay attention to the electrode pollution, for example, is not easy to choose to tip or half spherical electrode, replaceable electrode, scraper scale cleaning electrode and so on. Scraper can be on the outside of the sensor electrode regularly shave their scale by hand. In foreign products, ultrasonic sensors are installed on the electrode surface to remove scale, but now very rare. There are temporarily cut off of the measurement circuit and the electrode during the intermittent time of low voltage and high current flow, in order to burning and can remove the glue layer of the grease. Where the easy adhesion, can increase the flow rate to achieve the purpose of the clean.

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