Practical application of vortex, electromagnetic and ultrasonic flowmeters in natural gas purification devices

In this article, the editor wants to talk to you about the practical application of orifice flowmeters, vortex flowmeters, electromagnetic flowmeters and ultrasonic flowmeters in natural gas purification devices. What are the different uses? . Flow is an important testing parameter for natural gas purification devices. Correct fluid flow measurement is the basis for ensuring the safe operation of the production process and improving product quality. With the advancement of science and technology, in order to achieve the purpose of ensuring the quality of natural gas purification, energy saving and emission reduction, and improving production efficiency, people have taken corresponding measures and measures in various aspects such as improving the performance of the flowmeter, enhancing the adaptability of the use object and improving the economy. The fluid medium of the natural gas purification device is complex and diverse, and the measurement environment is different. There are many kinds of flowmeters to choose from. The commonly used flowmeters mainly include orifice flowmeters, vortex flowmeters, electromagnetic flowmeters, ultrasonic flowmeters, etc. 1. Orifice flowmeter Orifice flowmeter uses the principle that kinetic energy and static pressure energy can be converted into each other in the process of fluid flow for flow measurement. Orifice flowmeter is simple in structure, reliable, stable in performance, long in service life, low in price, and has a wide range of applications. So far, any type of flowmeter is unmatched. It can measure liquid, gas, and steam. Gas-liquid, liquid-solid, etc. can also be applied. However, due to its large pressure loss and narrow range (generally 3:1 to 4:1), the repeatability and accuracy of measurement are at a moderate level in flowmeters. 2. Vortex flowmeter The working principle of the vortex flowmeter is the Karman vortex principle of fluid mechanics. The vortex flowmeter has high measurement accuracy (up to ±1%), which belongs to the middle and upper level; the pressure loss is small, about 1/2 to 1/4 of the orifice flowmeter; the measurement range is wide, up to 10:1 or 20:1. However, it is not suitable for low Reynolds number measurement. Generally, ReD is required to be greater than or equal to 2 × 104, and the measurement diameter should not be too large (DN25 ~ 300mm). It is required to have a long straight pipe section upstream of the flowmeter or install a rectifier to ensure measurement accuracy. It cannot be used in the measurement environment with strong interference, large vibration and high pressure. 3. Electromagnetic flowmeter Electromagnetic flowmeter uses Faraday's law of electromagnetic induction to convert flow measurement into induced potential measurement. The electromagnetic flowmeter is not affected by the physical parameters of the medium, and has high precision; no throttling parts, no additional pressure loss, and is not easy to block; corrosion resistance, wear resistance, long service life; large measurement range (20:1 ~ 40:1 ), and the range can be changed arbitrarily; the requirements for the upstream straight pipe section are low, and the instrument caliber series is complete. However, the electromagnetic flowmeter is expensive, not suitable for non-conductive media and high-temperature media, and is sensitive to strong electromagnetic field interference in the environment. 4. Ultrasonic flowmeter Ultrasonic flowmeter detects flow by detecting the effect of fluid flow on supersonic speed. Ultrasonic flowmeter has the characteristics of wide measurement range and no pressure loss. Compared with the electromagnetic flowmeter that is also non-contact measurement, the application range is wider in terms of the measured medium, working state and pipe diameter, so it is especially suitable for the measurement of large pipe diameter and large flow. The ultrasonic wave is installed outside the process pipeline, and it can be moved and installed at any location. However, ultrasonic flowmeters are not suitable for high-frequency vibration occasions, and there are also restrictions on the temperature range of the fluid to be measured. At the same time, ultrasonic flowmeters are relatively expensive. The commonly used flowmeters include turbine flowmeters, rotameters, precession vortex flowmeters and uniform velocity tube flowmeters, etc., which will not be described in detail. If you want to know more about the flow meter and the properties and principles of the products above, please feel free to call and inquire with the editor, or you can directly log in to Kaidi's official website for detailed inquiries.

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