Steam flow meter in industrial production - Database & Sql Blog Articles

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Application of steam flow meter in industrial production

The application of steam flowmeter in industrial production is based on the principle of Kamen vortex street, which is mainly used for the flow measurement of industrial pipeline medium fluid, such as gas, liquid, steam and other media. It is characterized by small pressure loss, large measuring range and high precision. It is almost unaffected by parameters such as fluid density, pressure, temperature and viscosity when measuring the volume flow rate. No moving mechanical parts, so the reliability is high and the maintenance is small. Instrument parameters can be stable for a long time. The vortex flowmeter uses a piezoelectric stress sensor with high reliability and can operate in the operating temperature range of -20 °C to +250 °C. There are analog standard signals and digital pulse signal outputs, which are easy to use with digital systems such as computers. It is a relatively advanced and ideal measuring instrument.

Advantages of steam flow meter:
Advanced circuit, low power consumption, wide range ratio, simple structure, low resistance loss, sturdy and durable, wide application, long service life, stable operation, easy to install and debug.
The application of flow measurement technology and instrument for steam flowmeter vortex flowmeter has the following fields.
Industrial production process flow meter is one of the large-scale instruments in process automation instruments and devices. It is widely used in metallurgy, electric power, coal, chemical, petroleum, transportation, construction, textile, food, medicine, agriculture, environmental protection and People's daily life and other areas of the national economy are important tools for developing industrial and agricultural production, saving energy, improving product quality, and improving economic efficiency and management level. They play an important role in the national economy. In process automation instruments and devices, flow meters have two functions: as a test instrument for the process automation control system and a total meter for measuring the quantity of materials.
Steam flowmeter selection points
1. Precision function inspection accuracy grade and function According to the measurement requirements and the use occasions, the instrument accuracy grade is selected to achieve economical cost. For example, in the case of trade settlement, product handover and energy measurement, the accuracy level should be higher, such as 1.0, 0.5, or higher; for process control, select different accuracy levels according to control requirements; It is to detect the process flow, no need to do precise control and measurement, you can choose a lower accuracy level, such as 1.5, 2.5, or even 4.0, then you can use the low-cost plug-in vortex flowmeter.
2. Measurable medium When measuring medium flow rate, meter range and caliber measurement of general medium, the full flow of vortex flowmeter can be selected within the range of measuring medium flow rate of 0.5-12 m/s, and the range is wider. The instrument specification (caliber) is not necessarily the same as the process pipe. It should be determined according to whether the measured flow range is within the flow rate range. That is, when the pipe flow rate is too low to meet the flow meter requirements or the measurement accuracy cannot be guaranteed at this flow rate, It is necessary to reduce the gauge diameter, thereby increasing the flow rate inside the tube and obtaining satisfactory measurement results.
The choice of intelligent vortex steam flowmeter adopts VA type piezoelectric intelligent vortex steam flowmeter in the measurement of saturated steam. Because of the wide range of vortex flowmeter, in practical applications, it is generally considered to measure the flow of saturated steam. Not lower than the lower limit of the vortex flowmeter, that is, the fluid flow rate must not be less than 5m/s. According to the size of the steam, the intelligent vortex steam flowmeter with different calibers is selected, and the diameter of the transmitter cannot be selected by the existing process pipe diameter.
4. Selection of pressure compensation pressure transmitter Because the saturated steam pipeline is long and the pressure fluctuates greatly, pressure compensation must be adopted. Considering the corresponding relationship of pressure, temperature and density, only pressure compensation can be used in the measurement, due to pipeline saturation. The steam pressure is in the range of 0.3-0.7 MPa, and the range of the pressure transmitter can be selected as 1 MPa.
5. Display instrument selection display instrument intelligent flow display instrument, with voltage regulation compensation, instantaneous flow display and cumulative flow accumulation function.

Steam flow meter installation:
1. The flow meter can be installed indoors or outdoors. Environmental conditions should meet the requirements.
2. The flowmeter should be installed on a pipe that is horizontal, vertical or inclined (fluid flow from bottom to top) corresponding to its nominal diameter.
3. The flowmeter should be avoided from being installed on pipes with mechanical vibration. When vibration is unavoidable, consider adding a fixed support bracket to the straight pipe section about 2DN from the front and rear of the sensor.
4. The flowmeter should be avoided in places with strong electromagnetic field interference, heat radiation, corrosive gas, small space and inconvenient maintenance.
5 When the measured medium contains more impurities, the filter should be installed outside the length required for the straight pipe section upstream of the flowmeter.
6. The upstream and downstream of the flowmeter should be equipped with a straight pipe section of a certain length. The inner wall of the straight pipe section should be clean and smooth, with no obvious unevenness, scale and peeling. Its length should meet the requirements of Figure 2. The nearby pipe in which the liquid sensor is installed should be filled with the liquid to be tested.
7. The inner diameter of the straight pipe section should be as close as possible to the flowmeter diameter. If it is not consistent, the pipe diameter should be slightly larger than the flowmeter diameter. The error should be ≤3% and not more than 5mm.