Electromagnetic flowmeters are essential to the chemical industry because of their unique advantages. They play a vital role in various production processes.
Working Principle
Electromagnetic flowmeter working principle is based on Faraday's law of electromagnetic induction, when the conductive liquid in the magnetic field flow, will cut the magnetic lines of force, thus in the direction of flow with the liquid and the direction of the magnetic field perpendicular to each other on the electrodes to produce the induced electromotive force, the electromotive force and the flow rate of the liquid is proportional to the measurement of the induced electromotive force, can be accurately calculated the flow of the fluid.
SITRANS FM MAG 3100P
Ltd. in the coal chemical production, faced with the problem of strong alkali and solid particles erosion in the fluid measurement, selected the Huayi Aofeng electromagnetic flowmeter LD-DN80 obtained good results. Siemens SITRANS FM MAG 3100P electromagnetic flowmeter also has excellent performance in similar chemical environments. A large chemical company in the production of highly corrosive acid and alkali liquids in the process, the use of Siemens SITRANS FM MAG 3100P electromagnetic flowmeter, its PTFE or PFA liner and the ideal combination of Hastelloy electrodes, so that it can be very good resistance to corrosion of acid and alkali, to ensure the accuracy of the measurement and the stability of the equipment.
In the raw material delivery stage, the flowmeter accurately measures the flow rate of acid and alkali to ensure that the raw materials enter the reactor accurately and proportionally; in the product output stage, the stable flow measurement guarantees the smooth delivery and metering of the products, which provides strong support for the enterprise's safe production and cost control.
SITRANS FM MAG 3100
In the production process of polymerization reaction of another chemical company, it is necessary to measure and control the flow of polymer slurry containing certain solid particles. The Siemens SITRANS FM MAG 3100 electromagnetic flowmeter successfully met this challenge with its fully welded construction and a wide choice of lining and electrode materials. Its rugged design, adapted to the fluid environment containing solid particles, accurately measured the flow rate of the slurry, providing critical data for the stabilization of the polymerization reaction, ensuring consistent product quality and efficient production processes.
SITRANS FM MAG 6000
There is also a fine chemical company that requires high accuracy and stability of flow measurement when producing high value-added chemical products. The company chose Siemens SITRANS FM MAG 6000 series electromagnetic flowmeter, which has an accuracy of ±0.2%, and is able to accurately measure small flow changes. During the production process, the flowmeter accurately measures the flow of various expensive raw materials and intermediates, helping the company to strictly control the reaction conditions and material ratios, improving the yield and quality of the products, and at the same time reducing production costs and material waste.
A nylon company's epichlorohydrin device bottleneck elimination project, selected the U.S. Weidun VTON imported electromagnetic flowmeter, real-time monitoring of epichlorohydrin device in the liquid flow, to provide accurate flow data to help optimize the process parameters for the production process to provide decision-making support.
Strengths and Limitations
Electromagnetic flowmeter in the chemical industry has significant advantages. It has a strong adaptability to the fluid, and can measure a variety of acids, alkalis, salts and other corrosive liquids, as well as slurries containing solid particles. Its measurement accuracy is high, the basic error is usually up to ± 0.5%, or even higher, to meet the requirements of chemical production on the flow measurement of high precision.
Moreover, the electromagnetic flowmeter has a wide measuring range, the range ratio can be up to 100:1 or even higher, which can be adapted to the measurement needs of different flow sizes. In addition, the instrument has no mechanical moving parts, not easy to block, maintenance workload is small, reducing equipment maintenance costs and downtime, improve production efficiency.
Conclusion
However, the electromagnetic flowmeter also has certain limitations, such as only measuring conductive liquids, for non-conductive organic solvents and other fluids can not be measured, and the conductivity of the fluid needs to be maintained within a certain range, the installation of the straight section of the pipe also has requirements. But overall, electromagnetic flowmeter with its unique performance, for the chemical industry, efficient and stable production plays a key role, with the continuous development of technology, its application in the chemical industry will be more broad prospects.
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