_500x500.jpg)
『Gas liquid two-phase flowmeter』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
How can flow meters be more accurate? Which is better for use in gas-liquid two-phase media?
It should be noted that there are many reasons in the current market that lead to inaccurate measurement of flow meters. Inaccurate installation, usage errors, and other factors can all affect the accuracy of measuring limb registers. To use some flow meters well, attention should be paid to the details of their use. You can also consult experts, such as at No. 5 Yuhuazhai Street, Yanta District. A V-cone flowmeter can be used for gas-liquid flow, and it is almost applicable to gases, vapors, liquids, and solid dust. It can also measure high temperature and high pressure media: substances with a maximum working temperature of 700 ℃ and a maximum pressure of 42Mpa, dirty media, gas-liquid two-phase media, rock moisture, condensate water and other substances.
2. Can a vortex flowmeter measure gas-liquid two-phase media?
Okay. Its birth was mainly to fill the gap of electromagnetic flow meters and measure conductive media. The vortex flowmeter measures gas-liquid two-phase media, and if there is a small amount of gas (liquid) carried, there is no problem. Continuous gas carrying (liquid carrying) with more items will affect the measurement. Install a gas-liquid separator to separate the gas and liquid for measurement. Special orifice plates such as circular orifice plates, eccentric orifice plates for delayed liquids, and orifice plates with diversion holes can be used to measure mixed phase media, but the accuracy is not high, and one of the phases is dominant. Some structural forms of turbine (rotor) flow meters are insensitive to multiphase media.
3. Will there be fluctuations when the vortex f
When the vortex flowmeter is blown without isolation, there is a high probability that there will be fluctuations in the flow signal, and in severe cases, it may even output false flow readings.
.1. Core reasons for fluctuations 1 Turbulent changes in flow state: The vortex flowmeter operates based on the Karman vortex principle and only has a stable measurement output for stable single-phase continuous fluids. When blowing the liquid pipeline, the pipeline will quickly switch from a single-phase liquid flow of Zhibi to a two-phase flow of gas-liquid, or even to a pure compressed air flow. Bubbles will interfere with the stable generation and detection of vortex streets, disrupt the signal acquisition logic of the flowmeter, and cause output fluctuations. 2. Sudden changes in medium properties: The flow coefficient of the vortex street flowmeter is calibrated separately for the measured liquid, and the density and viscosity of the compressed air/nitrogen used for blowing are much lower than those of the measured liquid. Even if the flow state is stable, the output of the flowmeter will experience abnormal jumps due to mismatched physical properties, manifested as fluctuations. 3. Unstable flow velocity of the blowing airflow: If there are fluctuations in the pressure of the blowing gas source, the flow velocity of the airflow in the pipeline will continue to fluctuate. The frequency of vortex streets is strongly positively correlated with fluid flow velocity, and flow velocity fluctuations are directly transmitted as fluctuations in flow signals.
2. Practical Methods to Avoid Fluctuations 1 Priority should be given to using bypass blowing to blow throu
Hot Product
Related AD
