During the discharge of the rotary vane pump, the oil droplets suspended in the pumped gas are discharged along with the gas. Therefore, "oil mist" is often seen at the pump outlet. At the same time, a small amount of oil vapor is also discharged. With the improvement of environmental protection requirements, the new rotary vane pump generally has an oil and gas separation device at the outlet.
The diameter of the oil droplets in the exhausted gas is about 0.01-0.8 um, so that small droplets cannot be filtered by a general woven mesh, but a filter device made of a special fiber is used to achieve oil and gas separation, which is small enough. Micropores absorb oil mist. The filter element is placed in a cylindrical oil mist separator, and the gas discharged from the outlet enters the separator from the pump outlet. When the gas passing through the original filter reaches the filter outlet, it is already purified.
The oil is collected in a separator and the amount of oil collected can be seen by the viewing window. When the filter element is blocked, the pressure will increase. When the pressure reaches 1.5*105Pa, the safety valve of the separator opens and the filter element must be cleaned or replaced.
Dust removal device for rotary vane pump:
In some vacuum processes, a large amount of dust is generated, which will enter the rotary vane pump along with the pumped gas. Dust is mixed in the pump oil, causing wear and damage to the pump rotor and pump chamber like abrasives. When the amount of dust is small, it can be filtered by the oil filter system. However, to prevent the pump from being damaged when the amount of dust is large, the dust collector must be used to ensure the normal operation of the pump.
The pumped gas is introduced into the dust remover from the inlet of the dust collector, and the outer cylinder chamber is equivalent to a cyclone separator, where large particles of dust are separated and deposited at the bottom of the outer cylinder chamber. The smaller particles enter the oil leaching filter as the gas is pumped. The gas that has been sufficiently dedusted enters the vacuum pump from the outlet.
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Label: Rotary vane pump oil mist generation, separation and dust removal technology
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