The obvious function of electromagnetic flow meter scale in the water crisis

Abstract: the obvious function of electromagnetic flow meter scale in the water crisis information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. The obvious function of electromagnetic flowmeter in water crisis as the global rapid population growth, industrial development is rapid, global water situation to deteriorate rapidly, more and more serious water crisis. Response to this situation, our government will invest in the 11th five-year plan period new 3 0 0 000 million yuan. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the obvious function of electromagnetic flow meter scale in the water crisis article details. The obvious function of electromagnetic flowmeter in water crisis as the global rapid population growth, industrial development is rapid, global water situation to deteriorate rapidly, & other; Water crisis & throughout; Has become increasingly serious. Response to this situation, our government will be in & other; 11th five-year plan & throughout; During 3 0 0 000 million yuan investment built, renovated several dry city sewage treatment plant, in order to promote urban sewage treatment and utilization, pollution reduction. 2 0 0 4 years ago, many cities basically do not have large sewage centralized treatment plants and other facilities, not to mention the flow meter for sewage flow detection. In the process of wastewater treatment, raw sewage flow rate is a key parameter of the need to detect. Is due to the raw sewage containing particles, suspended solids, solid-liquid mixture, corrosive medium, the electromagnetic flowmeter zui feature is the ability to measure the acid, alkali, salt solution containing solid particles, and ( Such as mud) Or fiber liquid flow and, therefore, used the two electromagnetic flowmeter, used for the original sewage flow measurement. 1 first series working principle of electromagnetic flowmeter, the basic principle of the electromagnetic flowmeter is Faraday's law of electromagnetic induction, the conductor in magnetic field cutting magnetic movement, both ends of the induced electromotive force E: E - KBvD type, K is constant instrument; For the magnetic induction intensity (B T） ； M/v for conductor movement average speed sD for pipe diameter looking. First series electromagnetic kang hang meter work principle and structure as shown in figure 1, by the flow sensor and converter composed of two parts. Measure flow, conducting metal rods in the electrical conductivity of liquid is equal to the Faraday experiment, with an average speed v through the magnetic field perpendicular to the flow direction. Electrical conductivity of the liquid flow, in measuring electrode induction voltage is proportional to the average flow velocity. The induced voltage signal through a pair of E or a pair of more direct contact with the liquid electrode. According to the volume of fluid flow formula for Q = 1/4 butyl 【 D2v ( 2) By the formula ( 2) , Q and v is proportional to the corresponding function, then E and Q is proportional to the corresponding function, to measure the induced voltage E means to measure the volume flow rate Q of the medium. To measure the induced voltage E by cable to the converter, through the intelligent processing, then the LCD display, or converted into a standard signal 4 ~ 20 ma output. 2 first series electromagnetic flowmeter features ( l） Without measuring the pipe resistance elements, without additional pressure loss, difficult clogging, with remarkable energy-saving significance; （ 2) Have no moving parts, measure the pipe is not easy to wear, so long sensor life; （ 3) Sensors for short straight pipe, convenient installation; （ 4) Reasonable choice electrode and lining material, resistant to corrosion and wear resistance; （ 5) Two-way measurement system, the measurable forward and reverse flow; （ 6) Flow measurement of volume flow, and not the traffic density, viscosity, temperature, pressure, and the influence of the conductivity changes; （ 7) Sensor induction voltage signal, and a linear relationship between the average flow, high accuracy, ± 0. 3 r - - - 0. 5%) , wide range than ( 150 k) 。 3 first series electromagnetic flowmeter selection of instrument type selection is very important, related data show that instrument in two-thirds of faults in the practical application is instrument selection error or improper use, therefore, choose in certain electromagnetic flowmeter, still should according to different process, environment, measurement, media and other comprehensive consideration. 3 1 diameter selection according to the sewage treatment plant process pipe diameter, pipe pressure and water flow velocity, diameter D - 6 0 0 MRN electromagnetic flowmeter, the scene doesn't need to shrink tube and expanding. 3 2 lining, choice of electrode material first series electromagnetic flowmeter is mainly used for measuring electrical conductivity & ge; U S / 5 cm of fluid flow, should be based on the corrosion resistance, wear resistance, temperature of the measured substance and characteristics of coagulability and price to bear ability, should choose different lining, electrode materials. First series of electromagnetic flowmeter lining material: resistance to corrosive medium, generally low concentration of acid, alkali, salt of neoprene material, wear resistance and corrosion resistance of the general polyamine la rubber, strong corrosion resistance and is suitable for high temperature teflon, chemical properties of the same thing as teflon tensile, compressive, fep, the temperature of the resistance to dilute acid, alkali, salt & lt; Polyethylene and temperature 60 ℃ & lt; 100 ℃ of PPS, etc.

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