Scale DWM2000L type electromagnetic flowmeter in the application of circulating water system

Abstract: DWM2000L type electromagnetic flow meter scale in the circulating water system the application of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Pick to: this paper introduces the DWM2000L type electromagnetic flowmeter performance specification, technical indices. And sums up the instrument the practical application of circulating water system of petrochemical chemical device, as well as the application of other types of flow meters. Keywords: electromagnetic flowmeter cycle. More flow meter manufacturers choose model price quote you are welcome to inquire, here is DWM2000L type electromagnetic flow meter scale application article details in the circulating water system. Pick to: this paper introduces the DWM2000L type electromagnetic flowmeter performance specification, technical indices. And sums up the instrument the practical application of circulating water system of petrochemical chemical device, as well as the application of other types of flow meters. Keywords: electromagnetic flowmeter accuracy of circulating water system DWM2000L preface circulating water system as the device of the utility system, petrochemical chemical industry. Is not only an important link of environment maintenance, is also the key of local petrochemical chemical plant, so choose and make good use of circulating water flow meter is also a chemical plant in the drive stage one of the focus of the work. In this paper, Shanghai caojing chemical zone in circulating water system of solution styrene-butadiene rubber plant usage of application type DWM2000L electromagnetic flowmeter is introduced. 1 solution styrene-butadiene rubber plant circulating water system is provided by Japanese agms corporation process package technology, built in July 2006 to drive, can produce 15 kinds of brand of low solution styrene-butadiene rubber and rubber. Device in the normal amount of 4000 t/h circulating cooling water, Shanghai caojing chemical zone solution styrene-butadiene rubber device. Used for cooling process main body device materials, one of the local cooling water into the cooler used for lowering the temperature of the material, a local cooling water into the condenser used for cooling the gas phase materials for the liquid phase. Device set up two of the same capacity of cooling tower, a diameter of 7000 mm, the power of 75 kw, the capacity is 2000 m3 / h 3 powerful circulating pump was set up to supply cooling water into the process main body device. Establishes a sewage pipeline in circulating water system for periodic discharge waste water pollution; Set the make-up water line, used to discharge after added regularly; And dosing pipeline for inhibiting fungi breeding cycle water, preventing adhesion and corrosion of heat exchange equipment. The sewage and hydrating line chose OPTIFLUX4300cex/IFC300cex circulating water supply pipeline USES DWM2000L plug-in electromagnetic flow. Circulating water system process flow diagram is shown in figure 1. This line adopts the cologne company of electromagnetic flowmeter. Figure 1 circulating water system process flow diagram 2, 2 DWM2000L electromagnetic flowmeter. 1 measurement principle of the conductor in magnetic field movement can occur within the induction voltage U0 measured liquid water is a kind of conductor, according to Faraday's law of electromagnetic induction. Direction and perpendicular to the magnetic induction intensity B two electrodes ( Platinum electrode and grounding electrode) Between the induction voltage: U = KBVD type: K is constant; B for the magnetic induction intensity; V as the medium velocity; D as the electrode spacing. Is converted to a voltage U through transmitter is proportional to the velocity of flow, has nothing to do with the load of 4 ~ 20 ma electrical signal output. The principle diagram of the measurement is shown in figure 2. Figure 2 measurement principle in figure 2. 2 technical parameters are normal, DWM2000L plug-in electromagnetic flowmeter is suitable for the flow measurement of conductive liquid, pulp suspension. For IP66 protection grade equivalent to NEMA type 4 have diving, for IP68 protection grade can be used in the closed pipeline and flooded areas. DWM2000L for long length of the sensor can go beyond 3 m technical parameters as shown in table 1. Table 1 parameters in table 2. 3 second device to avoid large motor and produce the equipment of the magnetic field, select a location device when first meet the length of straight pipe upstream and downstream of the meter. In order to prevent the disturbance, also choose to facilitate the location of the device and maintenance. Device schematic diagram as shown in figure 3, figure 3 ( A correct way, b error in the device of long, must be inserted into the depth of marks, usually inserted into the depth of pipe diameter of 1/8 insertion depth after meet, turn the sensor as a whole, make the flow marks and fluid in the same direction. After zui, lock lock tight, taut security chain. For diving, users pay close attention to, can't open the IP68 cable interface, manufacturers of cable connection mouth before they go out for a special sealing treatment. Diagram 2 figure 3 device. 4 set made the direction arrow on the electronic parts and medium flow direction is consistent, which determine the location of the electronic components. Open the converter shell. Then twist lock tight. If do not agree with medium flow direction arrow direction, will produce a wrong measurement results. With V = m/Q = m3 / hD = pipeline Canon mm (2) set the reference speed. Through the two dial the code switch ( 1 m/s and 0 s. 1 m/set the reference speed. Speed of calculation can be in accordance with the formula V = 354 q/DD. (3) set time constant. Time constant 58 or 10 through dial the code switch selection circuit disconnection; Normally open contact NC said when the speed is greater than the reference speed, (4) set the alarm state. Normally closed contacts NO said when the speed is greater than the reference. Closed circuit; The circuit is disconnected, LED lights lit up. Must not damage the sealing ring, be especially careful when set up connection IP68 shell rubber seal device. And the sealing ring in appearance there can be no damaged, in order to prevent damage of IP68 shell water meter. 3, DWM2000L electromagnetic flowmeter under the guidance of the practical application of the device engineers in the instructions for installation, in April 2006.

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