Assembled oil-gas separator and oil-gas separation method thereof

Abstract

The invention provides an assembled oil-gas separator and an oil-gas separation method thereof. On the basis that a traditional oil-gas separator is used for performing crude separation through a cyclone separator and performing fine separation through a filter element, an inlet primary separation device and an inertial separation area are additionally arranged, and a single hydrocyclone in the traditional oil-gas separator is changed into an inner hydrocyclone and an outer hydrocyclone which are embedded into each other; and a porous thin-walled cylinder used for preventing secondary entrainment is arranged in a barrel. By adopting the inlet primary separation device and the inertial separation area, the capability of the oil-gas separator for adapting to compressor variable working condition operation is effectively improved; the inner hydrocyclone and the outer hydrocyclone are used for whirling an oil-gas mixture, the lengths of paths for moving of centrifugal separation oil dropsto the wall surface are shortened, the efficiency of a centrifugal separation section is improved, the separation effect of a filter element is indirectly improved, and the service life of the filterelement is prolonged; and since an annular space exists between the porous thin-walled cylinder and the barrel, airflow moving at a high speed is effectively prevented from impacting oil film moving downwards along the surface of the barrel, and the separation efficiency is improved.

Description

Technical field [0001] The invention relates to a two-phase separation device, in particular to a combined oil-gas separator for oil-gas separation in an oil-injected compressor and an oil-gas separation method. Background technique [0002] When the oil-injected compressor is working, lubricating oil is injected into it to cool down, lubricate and seal the compressor. After being compressed by the rotor, the two-phase mixture of compressed air and lubricating oil is separated by an oil-air separator. In order to improve the quality of compressed air and ensure the safe operation of the compressor, it is necessary to separate the liquid oil droplets as much as possible, which puts forward strict requirements on the separation efficiency of the oil-gas separator. The compressor is designed under rated working conditions, but in actual operation, the inlet and outlet pressures will change according to the actual use requirements, resulting in fluctuations in the displacement. The...

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Problems solved by technology

[0004] Therefore, when the operating conditions of the compressor change greatly, the ability of the cyclone separator to adapt to variable operating conditions is limited, which will reduce the efficiency of coarse separation, resulting in too high oil content in the oil-gas mixture entering the filter element, thereby reducing the separation efficiency of the fine separation process. Increase the resistance of the filter element, shorten the service life of the filter element, and affect the energy-saving operation of the compressor

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