Industry new

Electromagnetic flowmeter can measure different mixed liquid introduction

As one of the commonly used measuring instruments in the industry, electromagnetic flowmeter can effectively measure the data you want. At the same time, the measurement accuracy level and function of the electromagnetic flowmeter can select the accuracy grade of the instrument according to the measurement requirements and the use occasions, so that it is truly economical. For example, in the case of trade settlement, product handover and energy measurement, the accuracy level should be higher, such as 1.0, 0.5, or higher; for process control, select different accuracy levels according to control requirements; It is a measurement and detection process flow, no need to do precise control and measurement, you can choose a lower accuracy level, such as 1.5, 2.5, or even 4.0.
Electromagnetic flowmeters This series of products are good tools for measurement in industries such as industry and agriculture. You can choose it according to your specific needs.
1. Electromagnetic flowmeter measures liquid containing bubbles
The microbubbles mixed into the bubble flow can still work normally, but the mixed volume flow rate containing the bubble volume is measured; if the gas content is increased to form a bomb (block) flow, the electrode may be covered by the gas to make the circuit instantaneously broken. On, output sloshing does not even work properly.
2. Electromagnetic flowmeter measures the liquid of solid-liquid two-phase flow
A solid-liquid two-phase fluid containing non-ferromagnetic particles or fibers can also measure the volumetric flow of the two phases. Fluids with higher solids content, such as drilling mud, drilling cement slurry, pulp, etc., are actually non-Newtonian fluids. Since the solids flow together in the carrier liquid, there is a slip between the two, and there is a difference in speed. The single-phase liquid calibration meter can cause additional errors for the solid-liquid two-phase fluid. When there are reports in foreign countries that the solid content is 14%, the error is within 3%; the test report of the Institute of Hydraulic Research of the Yellow River Conservancy Commission of China says that the flow rate of high sand content water is measured, and the volume ratio of sediment is 17% to 40% ( The sand median particle size is 0. 35 mm), and the meter measurement error is less than 3%.
In the slurry, there are large particles rubbing across the surface of the electrode. In the electromagnetic excitation flowmeter with a lower frequency, a spike-like slurry noise is generated, which makes the flow signal unstable, so it is necessary to use a higher frequency meter or have stronger suppression. The instrument for slurry noise capability can also be selected from the mains AC excitation instrument or the dual-frequency excitation instrument.
3. Electromagnetic flowmeter measures liquid containing ferromagnetic substances
Fluids containing ferromagnetic substances are common to electromagnetic flowmeters because the magnetic permeability of the measuring tube is varied by the different contents of the ferromagnetic body, which causes measurement errors. However, an electromagnetic flowmeter EMF with magnetic flux detection coil compensation is placed in the magnetic circuit. It can reduce the influence of mixed ferromagnetics. The test report shows that the water contains a slurry with a liquid-solid weight ratio of about 4:1 and a particle size of ≤ 0.15mm. The 80mm diameter meter is used for the comparison of the flow rate of clean water and slurry. The average value of the instrument indicates a change of 7 % to 10%. The meter with the flux detection coil has an indication error of ±2 % Fs.
4, electromagnetic flowmeter to measure pulp
For pulp applications containing ore particles, attention should be paid to the degree of wear on the sensor lining, which may cause additional errors in the inner diameter of the measuring tube. In this case, a ceramic lining or a urethane rubber lining with better wear resistance should be used. It is also recommended that the sensor be installed on a vertical pipe to make the pipe wear evenly and eliminate the disadvantage of partial wear of the lower half of the horizontal installation. It is also possible to add a nozzle-shaped sheath at the inlet end of the sensor to extend the service life.

PREVIOUS：What types of common electromagnetic flowmeteNEXT：Electromagnetic flowmeter troubleshooting 5 m