Electromagnetic flow meter scale in the application of strong corrosive environment

Abstract: the application of electromagnetic flow meter scale in strong corrosive environment information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Urea production plant in henan zhongyuan chemical group, adopted two electromagnetic flowmeter. One is used for measuring high pressure of the inlet flow pump; The other is hydrolysis liquid flow measurement. No matter in practical application on the response speed, or in other aspects. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the application of electromagnetic flow meter scale in strong corrosive environment article details. Urea production plant in henan zhongyuan chemical group, adopted two electromagnetic flowmeter. One is used for measuring high pressure of the inlet flow pump; The other is hydrolysis liquid flow measurement. No matter in practical application on the response speed, and other various features are able to meet the needs of the process. But there have been some issues we unexpected. Since October 89 completed and put into operation, only high pressure of the inlet pump flow measurement of electromagnetic flowmeter it broke two, another one of hydrolytic waste liquid damage of electromagnetic flowmeter has happened many times. The emergence of these problems in terms of process operation or from the consumption on production cost is increased quite a burden to our factory, in this paper, combining with our application, makes a discussion on this question. Working principle and characteristics of electromagnetic flowmeter 1, the working principle of the electromagnetic flowmeter system made up of transmitter and transducer, between the two by two with double shield cable connections, transducer installed on the pipeline system, while the converter can be installed in the middle of the scene or room. Instrument of measuring principle is based on Faraday's law of electromagnetic induction: when a conductor in magnetic field for cutting lines of magnetic force movement, at opposite ends of a conductor will produce inductive electromotive force. This law is applied to the conductive fluid is also established. If the magnetic field strength for B, pipe diameter D, induction electric potential for E, you can prove that the volume of the pipe flow of Qv = D / 4 & times; （ E/B） The type B and D are set in the table, 'E' is for measuring pipe via the transmitter on a pair of electrodes to measure the actual electromagnetic flowmeter is based on the principle of work. Visible electromagnetic flowmeter is volume flow measurement instrument, it has to do with the fluid temperature, pressure, density, viscosity and conductivity and other physical properties. 2, the characteristics of the electromagnetic flowmeter, electromagnetic flowmeter has the following characteristics: ( 1) Sensors to measure the medium contact and can be used for corrosive conductive medium flow measurement; （ 2) Span a wide range, the same range of electromagnetic flowmeter ratio of 1:100; （ 3) No pressure loss; （ 4) No moving parts (testing part 5) Positive and reverse the flow of fluid can be determined; （ 6) Fast response speed. These are the advantages of electromagnetic flowmeter, but it also has some limitations and shortcomings. （ 1) Must be conductive: (measured medium 2) Due to limited by sounding pipe lining materials, general use temperature range of 0 ~ 200 ℃, and because of the electrode is mounted on the tube, the working pressure for electromagnetic flowmeter. （ 3) Electromagnetic flowmeter is complicated, the price is higher. 3, the application of electromagnetic flowmeter FT - our factory of the inlet pump flowmeter 09101 for the German FISCHER& POTER products company, since its launch in October 89, has replaced the two pieces, zui using DX1221 type at the beginning of the electromagnetic flowmeter shell with stainless steel, measure the tube wall with ptfe, converter closed within a rectangle metal shell, the internal circuit boards have a four-digit data set, can make measurements of indicator. Through two cable connection between transmitter and transducer, transmitter is installed on the pipeline, fixed beside the framework of converter. This flowmeter in both zero and span cannot adjust itself, only in a designated manufacturer calibration, use is not very convenient. The flowmeter putting-in-service proactively run is not to the year, indicating there is a failure, after inspection found that the corrosion happened transmitter circuit board, there are a few crystal triode tube feet have rust off, this does not cause enough attention, we just change a few only triode then back pack, so the table and run for a few months after repair, then lost the instructions.

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