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Industry Information
What are the applications of vortex flowmeters in measuring liquid flow?
2012-4-6 8:56:29

压力损失小,量程范围大,精度高,在测量工况体积流量时几乎不受流体密度、压力、温度、粘度等参数的影响造就了涡街流量计应用也非常广泛,基本上可以应用于所有气体。 The vortex flowmeter has a small pressure loss, a large measuring range, and high accuracy. It is almost independent of parameters such as fluid density, pressure, temperature, and viscosity when measuring volume flow under working conditions. The vortex flowmeter is also widely used. Basically, Can be applied to all gases. Vortex flowmeter is used in measuring coke oven gas. Vortex flowmeter is used in coke oven gas. The LY-LUGB intelligent vortex flowmeter is selected, which overcomes the shortcomings of non-seismicity. It is also possible to identify and screen probe signals. And now there are many cases where vortex flowmeters are used to measure coke oven gas. However, there will still be some small problems due to media and operation errors. We have found the following phenomena from a large number of users.

从而使强电中的50Hz干扰进入,当正常信号高于50Hz时输出正常信号,反之则会输出错误信号。 1) The ground wire of the instrument does not meet the requirements of the specification. The vortex flowmeter will cause 50Hz interference in the strong current to enter. When the normal signal is higher than 50Hz, it will output a normal signal, otherwise it will output an error signal. [Solution] Strengthen the management of the measurement system data, set up a regular printing function, and analyze the operation of the instrument based on the printed data combined with the production status. 2) Because the coke oven gas has many impurities, it is easy to crystallize, and the impurities are condensed on the sensor head, which causes measurement inaccuracy. When the temperature increases, the impurities evaporate, the sensitivity increases, and the signal increases; on the contrary, it decreases. As a result, data is unstable. [Solution] Periodically clean the instrument as a whole, if necessary, purge the sensor head part of the instrument to avoid the condensation of impurities on the sensor head. In the cold season, adding a heat tracing device to the metering straight pipe section and the meter part is also beneficial to alleviate the condensation of impurities at the metering meter. 3) Due to the high temperature and high humidity of the coke oven gas when it leaves the factory, there will be moisture in the gas transportation process. The gas flow drives the water back and forth to form a pulsating flow. When the vortex flow sensor is in this fluid state, the output data is suddenly large or small, and it cannot reflect the production status at all. [Solution] For the measurement system in operation, the method of “dual-track measurement, comparison and confirmation” and the “replacement method” can be used to confirm and eliminate the measurement instrument failure in operation. 4) The crimping line is not solid during the wiring of the instrument, which causes the signal to be intermittent during transmission. [Solution] Drain the pipe regularly, especially the water before the straight pipe section, and set a special person to discharge it regularly according to the specific situation, reduce the water in the metering pipe section as much as possible, and eliminate the pulsation in the fluid to the maximum extent. 5) Vortex flowmeters are not suitable for installation in places with strong vibrations, which are widely known by users. However, in situations where the magnetic field changes frequently, the vortex flowmeter will measure higher than normal signal output. Practice has proved that in a scene where no gas flows, when the vortex flow sensor is in a changing magnetic field, the vortex flow sensor will sense an error signal and output it when the magnetic field changes. When the change is over, the meter is in a stable magnetic field. The meter will output a normal signal. [Solution] In the process of instrument installation and connection, ensure that each link is accurate, including inspection of the site before installation, instrument wiring during installation, system ground wire, etc., so as to ensure that real data is detected and able to Accurate output

用于液体流量测量,被用户看好的是:它具有的量程范围较宽、压力损失较小、精确度中等偏上、输出线性、无可动部件、可靠性高、维护量小、价格中等偏低、性能价格比较高等特点。 Vortex flowmeters are used for liquid flow measurement. Users are optimistic that it has a wide measuring range, low pressure loss, medium-to-high accuracy, linear output, no moving parts, high reliability, and low maintenance. , Medium low price, high performance price and so on. In terms of measuring liquid flow, vortex flowmeters should be applied in the following areas: (1) Flow measurement of various industrial water, including various production in chemical, light industry, power, metallurgy, building materials, petroleum and other industries Recycling water, waste water and waste liquid of the process. (2) Measurement of some corrosive liquids, such as sulfuric acid, hydrochloric acid, nitric acid, acetic acid and other chemical solutions. (3) For the measurement of non-conductive liquids, if electromagnetic flow meters dominate the flow measurement of conductive liquids, in the field of non-conductive liquid flow measurement, electromagnetic flow meters are powerless, and Vortex Flow meters are of great use. Vortex flowmeters with a small diameter (DN <25mm) introduced in recent years are more suitable for applications in this field. Some vortex flowmeter products use the compression molding process to make the sensors of the vortex flowmeter into all-plastic products, and then configure non-contact ultrasonic detection elements to make non-contact measurement of liquids, which can be used for corrosive liquids and high-purity liquids. Flow measurement. According to relevant information, in the petrochemical, pharmaceutical, food, and semiconductor industries, vortex flowmeters have achieved fruitful applications, such as: methanol, formaldehyde, acetone, toluene, trichloroethylene, ethylene, butane liquid ammonia, etc. There are pure water and ultra-pure water in the semiconductor industry: (4) Flow measurement of some low-viscosity oil products, such as gasoline, kerosene, diesel, and heavy oil, residual oil, etc., which are reduced by heating viscosity. 0+ (5) Large-diameter pipe water flow measurement. The full-tube vortex flowmeter is mainly used for small and medium-sized pipe diameters, while the inserted vortex flowmeter can be used for large-diameter (DN≥300mm) pipe flow measurement. Widely used in urban water pipelines and industrial water pipelines in chemical, power, metallurgy, papermaking, chemical fiber and other enterprises.