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1. What flow meters are commonly used on steam pipelines? Vortex, orifice, bend, and electromagnetic flow meters are commonly used in steam pipelines. The core selection needs to be determined based on the steam state, pipe diameter, and operating conditions. 1. The vortex flowmeter is based on the Karman vortex principle and calculates the flow rate by detecting the vortex frequency generated when the fluid passes through the vortex generator. The structure is simple and has low pressure loss, with a wider range than orifice plates and an accuracy of 1.0 level. It is also suitable for saturated steam and superheated steam. Suitable for scenarios that require long-term stable monitoring and minimal pipeline vibration
2. The classic type of orifice flow meter differential pressure type is the flow data conversion method, which utilizes the pressure difference before and after the orifice plate to convert flow data. The biggest advantage lies in sufficient historical verification, complete support for international standards, and adaptability to large diameter (DN500 or above) steam pipelines. However, the throttling design can result in a pressure loss of up to 3-8kPa, and special attention should be paid to regularly cleaning the pressure tapping hole. The elbow flowmeter utilizes the physical characteristics of centrifugal force at the elbow to form a pressure difference between the inside and outside, which belongs to non-contact measurement methods. The absence of inserted components makes it stand out in steam containing impurities, especially suitable for high flow rate (≥ 35m/s) main steam pipelines in power plants. During installation, there is no need to stop cutting the pipeline, and the maintenance co
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2. How to slow down the steam vortex flowmeter
Adjusting the burial speed of the steam vortex flowmeter can be achieved by adjusting the Reynolds coefficient.
. In terms of specific operation, it is necessary to adjust the sensor settings inside the flowmeter to change the Reynolds number when the fluid passes through. The Reynolds number is a key parameter for determining the flow state of a fluid (laminar or turbulent). When the Reynolds number is low, the fluid flow is smoother and the speed is slower; When the Reynolds number is high, it indicates that the fluid flow is more intense and the speed is faster. The operation process for adjusting the Reynolds coefficient: Firstly, close the upstream valve of the flowmeter to ensure that there is no fluid flow in the pipeline. Next, open the downstream valve of the flowmeter and allow the fluid to pass slowly. Then, adjust the sensor settings inside the flowmeter and gradually reduce the Reynolds number until the desired flow rate is reached. During this process, Brother Bentou needs to pay attention to monitoring the pressure and temperature changes of the flow meter to ensure the safe operation of the equipment. It is worth noting that when adjusting the Reynolds coefficient