Saturated steam vortex flowmeter

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1. Help you answer the question about the selection of steam flow meters

The selection of steam flow meters should be based on the type of steam (saturated steam, superheated steam, wet saturated steam) and the characteristics of the operating conditions to choose a suitable solution. Vortex flow meters are commonly used types, but they need to be adjusted in combination with compensation and operating conditions. The following are specific selection points for the model sail:

Firstly, selecting saturated steam based on steam type only requires temperature or pressure compensation, and the mass flow rate is calculated by checking the density table. If the saturated steam deviates from the design state in actual working conditions (such as temperature/pressure changes), the density relationship needs to be recalibrated. Selection suggestion: Priority should be given to vortex flowmeters that support single parameter (temperature or pressure) compensation, and confirm that their code density meter covers the operating range. Overheated steam must undergo temperature and pressure dual parameter compensation, and the density can be obtained by looking up a table to calculate the mass flow rate. When long-distance transportation or insufficient insulation occurs, superheated steam may cool down to wet saturated steam (including water droplets). At this time, it is necessary to distinguish the settlement method: settlement by dry part: the influence of water droplets can be ignored, and the output of the vortex flowmeter only reflects the flow rate of the dry part, with accurate measurement. Settlement based on total flow rate: Failure to measure condensed water will result in lower results, and other types of

flow meters (such as split type steam flow meters) need to be used or condensed water metering devices need to be added. Selection suggestion: Choose a vortex flowmeter that supports dual parameter compensation and clarify settlement rules to avoid errors. After the wet saturated steam pressure reducing valve, there may be a phase change due to adiabatic expansion: mild pressure reduction: the temperature drops to the saturation temperature at the new pressure, and it is still saturated steam, which has no effect on compensation, but the dryness increases. Severe decompression: After the temperature drops, it still remains above the saturation temperature under new pressure and becomes superheated steam, requiring dual parameter compensation again. Selection suggestion: When installing a flowmeter after the pressure reducing valve, it is necessary to choose a vortex flowmeter that can adapt to rapid phase changes and configure automatic compensation function.

2. Key considerations: Choose saturated steam as the compensation method: single parameter compensation (temperature or pressure).

. Overheated steam: dual parameter compensation (temperature+pressure). Wet saturated steam: Select single/dual parameter compensation based on the reduced pressure state. In response to changes in operating conditions, the steam state may deviate from the design value due to factors such as conveying distance, insulation, and pressure reduction. Therefore, it is necessary to choose a flow meter that supports dynamic compensation or can be calibrated on site. Regularly verify the compatibility between the density table and actual working conditions, and update compensation parameters if necessary. The settlement rules have an

1. Help you answer the question about the selection of steam flow meters

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