Generally speaking, the station flow of natural gas gathering and transporting station is gas source - control valve - separator - orifice plate - Manifold - pressure regulating device - orifice plate - transporting to the next station.
Although natural gas has been separated, when gas flows through throttle parts (such as throttle needle valve, throttle orifice plate), because the outlet pressure decreases (that is, orifice orifice throttle phenomenon), the droplets of gas inclusion will be separated into bubbles, and the residual liquid can not be discharged from the sewer pipe, which makes people mistakenly think that the gas and liquid are separated. In fact, during the transportation process, bubbles accumulate into droplets, causing The harm to pipeline and the decline of air quality.
For a long time, the prominent problem in the natural gas production process is that it is difficult to separate the tiny droplets and oil mist in the gas.
Liquid water droplets are the fundamental cause of corrosion of equipment, pipes and valves, so it is necessary to use a multi-stage separation and filtration device in natural gas system to treat dry gas with a certain relative humidity.
Adding a filter before the gas pressure regulating device or metering device is similar to that of the hydraulic filter. It not only has the function of filtering residue, but also has the function of catching and defoaming, and also has the function of steady flow.
But it is necessary to clean the filter regularly, keep the filter intact, improve the filter structure, improve its performance and reduce its additional pressure loss.