What are the commonly used steam flow meters in power plants

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1. What flow meter is best for measuring steam in power plants? In theory, differential pressure flow meters (orifice plates, cone flow meters, etc.) and vortex flow meters can be used. However, the steam in power plants is generally superheated steam with a relatively high temperature. The maximum measured temperature of the vortex flow meter is generally not more than 350 degrees Celsius. Therefore, differential pressure flow meters have higher temperature resistance compared to vortex flow meters because the sensors are purely mechanical mechanisms. This is the advantage of differential pressure flow meters. However, during the installation of differential pressure flow meters, due to the large number of accessories such as pressure pipes and condenser tanks, regular maintenance is necessary to check for pressure leakage points. In winter, anti freezing measures need to be taken. Therefore, more manpower and material resources are invested in maintenance compared to vortex flow meters. After the installation of vortex flow meters, if there are no special problems, they generally do not need maintenance. You can choose Laojian based on the characteristics of the two flow meters mentioned above and the actual situation. Professional manufacturer of thermal (flow) instruments, welcome to discuss

2. What flow meters are generally used on steam pipelines?

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 calc

ulated 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 significant pressure loss. V-cone flowmeter: utilizing the V-cone throttling effect, with low pressure loss and high measurement accuracy, suitable for high viscosity or dirty media. Features: Suitable for high-temperature and high-pressure steam pipelines, but requires regular maintenance of throttling devices. The measurement accuracy is affected by fluid density an

What are the commonly used steam flow meters in power plants

2. What flow meters are generally used on steam pipelines?

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