Application of Turbine Flow Meter to Measurement of Steam Flow

Abstract: The information on the measurement and application of steam flow by the turbine flow meter is provided by the excellent manufacturers of flow meters and flow meters. In a certain flow range, the vortex separation frequency of the turbine flowmeter is proportional to the average flow velocity in the pipeline. The capacitance probe or piezoelectric probe (detector) is installed in the vortex generator and the corresponding circuit is configured, which constitutes a capacitive detection type turbine flow. meter or piezoelectric detection. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the article on the measurement and application of steam flow by turbine flowmeters. In a certain flow range, the vortex separation frequency of the turbine flowmeter is proportional to the average flow velocity in the pipeline. The capacitance probe or piezoelectric probe (detector) is installed in the vortex generator and the corresponding circuit is configured, which constitutes a capacitive detection type turbine flow. meter or piezoelectric detection turbine flow sensor. To ensure full measurement functionality, the flow pattern at the inlet should be undisturbed. The length of the upstream straight pipe section should be approximately 15 times the diameter of the turbine flowmeter (D), and the length of the downstream straight section should be approximately 5 times the diameter of the flowmeter (D). When a bluff vortex sounding body is set in the fluid, two regular vortexes are generated alternately from both sides of the vortex. This vortex is called the verification technology of the Kaman turbine steam flowmeter. It is still in the research stage in China. Some production plants have successively established standard devices using steam as the working medium. However, due to factors such as high energy consumption and poor working conditions, efforts are being made to find new ways to use air as the working medium. After investigation, there are two main types of standard devices that use air as the working medium in China: one is the sonic nozzle type. Although the measurement accuracy of the device meets the measurement requirements, the device is relatively high, and each device is about 1 million. . Practice has proved that the technology is feasible, but the investment cost and management and operation cost are huge, and it is impossible for general measurement and verification institutions to widely use it. There is also a fan orifice type. Although the cost of this device is not high, the accuracy is low. In addition, the pressure loss of this type of device is large, and the air source pressure is low, so the range often cannot meet the verification requirements. The national metrology department has confirmed this. In addition, some domestic units are also trying to use vortex flowmeters to replace nozzles or orifices, but the use parameters are not yet mature. In order to solve the above problems of steam measurement and verification, Liangbang Instrument and Nanjing Institute of Quality and Technical Supervision participated in the development of the LDQ type gas flow standard device. For the first time, the turbine flowmeter was applied to the transmission of gas (including steam) flow and obtained satisfactory results. Its advantages are as follows: 1. The device using the turbine flowmeter as the transmission standard has the advantages of wide range, small pressure loss, good repeatability, etc. It overcomes the defects of large pressure loss and insufficient range of other types of devices, and has low cost and investment. It is about 20% of the sonic nozzle type device. 2. The main error term (system error) of the standard table is eliminated by the error tracking method, which greatly improves the measurement accuracy of the device. 3. Pass the air in the flow of steam——The steam conversion factor is determined by regression processing of a large number of experimental data, and the confidence is relatively high. The above is the entire content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Measurement and Application of Turbine Flow Meter for Steam Flow'

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