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What flow meter is better for measuring steam flow?
Steam flowmeter measurement can generally use vortex flowmeter, mainly for gas measurement instruments.. This flowmeter is based on the principle of Karman vortex street. When the fluid flows through a vertically inserted triangular cylindrical generator, an ordered vortex street will be generated behind it. The frequency of these vortex streets is proportional to the flow velocity of the fluid. By detecting the number of these vortex streets, the flow velocity of the fluid can be calculated, and the volumetric flow rate can be calculated based on the diameter of the pipeline. Vortex flowmeter is suitable for measuring high temperature and ultra-high temperature steam because it can withstand high temperature and high pressure environments. In addition, vortex flowmeters have the characteristics of small pressure loss, large range, reliable stability, and no direct contact with the medium. However, the density of steam varies with temperature and pressure, so when measuring steam flow, it is necessary to use a balanced rubber vortex flowmeter with temperature and pressure compensation functions to ensure accurate measurement of the actual amount of steam used. In addition to vortex flowmeters, there are also differential pressure flowmeters that can be used for measuring steam flow. However, differential pressure flow meters are gradually being phased out by users due to high pressure loss, large maintenance requirements, and low accuracy levels. In contrast, vortex flowmeters have significant advantages in measuring steam flow.
2. What is the approximate price of a water flow meter?
3. What flow meters are commonly used on steam pipeli
The commonly used flow meters on steam pipelines mainly include the following types, which need to be selected based on actual working conditions, measurement accuracy, range, pressure loss, and installation and maintenance costs.
1. Working principle of vortex flowmeter: Based on the Karman vortex street principle, the steam flow rate is calculated by measuring the alternating vortex frequency generated by the impact of steam fluid on the triangular cylinder vortex generator.
. The vortex frequency is directly proportional to the average flow velocity of the fluid, and the volumetric flow rate can be calculated by combining the cross-sectional area of the pipeline. Applicable conditions: Preferred for steam pipeline temperature ≤ 300 ℃, with low cost and wide applicability. Large measurement range, low pressure loss, high accuracy (usually ± 1%~± 2%), and high reliability. No movable mechanical parts, low maintenance, and long-term stable instrument parameters. Structural composition: sensors, converters, display instruments. Sensors (such as piezoelectric stress sensors) convert vortex mechanical effects into electrical signals and output flow values after processing. Signal output: Supports analog signals (4-20mA) or digital signals (pulse signals) for easy data transmission and reading. Image: The vortex flowmeter is disassembled to measure the vortex frequency and calculate the flow rate Working principle of differential pressure flowmeter: Based on Bernoulli equation and flow continuity equation, the flow rate is determined by measuring the differential pressure generated by throttling devices (such as orifice plate, nozzle, V-cone). Common type: Orifice flowmeter: simple structure, but signif