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1. Is the compressed air flow meter used in the steel plant under standard conditions or working conditions?
1. The compressed air flow meter used in the steel plant should be adapted to the working conditions.
2. Standard conditions and working conditions are two different environmental states, where standard conditions refer to standardized testing conditions.
3. Working conditions refer to the conditions in the actual working environment, including parameters such as pressure and temperature.
4. If it is necessary to convert the flow data under working conditions into flow data under standard conditions, the conversion formula can be used.
5. The formula state is: standard condition flow=working condition flow x (working sail rubber pressure+1)
6. Among them, the working pressure needs to be input in kgf/cm ², while the flow rate is measured in standard state (0 ° C, 1atm).2. What kind of flowmeter is good for measuring compressed air
There are many instruments that can be used to measure air, but there are not many types of air flow meters actually used on site according to their working principles.
. The most important ones are rotor flow meters, throttling differential pressure flow meters, vortex flow meters, and averaging tube flow meters.1、 When measuring compressed air, flow meters are usually installed in the compressor room and blower room. However, vibrations generated by compressors or blowers can be transmitted to distant vibrations through air ducts or ducts. This vibration can cause the vortex flow sensor to generate interference signals corresponding to the vibration frequency, disrupting the cavity mode and resulting in significantly high
2、 Compressed air is taken from the atmosphere, which always contains water vapor. For orifice flow meters that measure the flow rate of compressed air with larger diameters, there is often water accumulation in front of the orifice plate, which can affect the measurement accuracy. In addition, there is often a section of water accumulation in the pressure pipe, which causes the differential pressure measured by the differential pressure transmitter to be inconsistent with the differential pressure generated by the throttling device. This is also one of the reasons for errors caused by air carrying water.
3、 The fluid at the outlet of compressors and blowers often contains certain pulsations. Pulsating fluid can cause high readings in various flow meters such as differential pressure flow meters and vortex flow meters, and even cause the rotor in the rotor flow meter to jump up and down. To eliminate the influence of pulsation, a buffer tank is usually installed at the outlet of the compressor to filter out pulsation, and a flow meter is installed after the buffer tank; Alternatively, the flowmeter can be installed in a location away from the pulsation source.
4、 The averaging tube flowmeter has unique advantages in measuring large turbulent aperture air flow. It is inexpensive, structurally simple, highly reliable, and easy to install and maintain, making it a good supplement to vortex flowmeters and throttling differential pressure flowmeters.
3. What is the main purpose of a compressed air flow meter for measuring?
A compressed air flow meter is mainly used to measure the instantaneous flow rate, cumulative flow rate, and gas parameters under working con
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