METHOD OF PURIFYING LIQUID Russian patent published in 2015 - IPC B01D17/28 B01D17/22 

FIELD: chemistry.

SUBSTANCE: block-modular coalescent filter is used to split a stream into two separation zones of different volume, the first zone for primary purification and the second zone for final purification; in the first, larger primary separation zone, the flow rate of the liquid stream is reduced by expanding the stream and the stream is fed for further energy dissipation into variable-cross-section collectors with slit-type gaps of different cross-section, equipped with internal deflectors of different size and bending radius, after which the stream is split by gravitation into phases which are removed from the primary separation zone; the primary-purified liquid with oil product residues is fed through the block-modular coalescent filter into the secondary separation zone for final purification, where the stream is also split by gravitation into phases which are removed from the secondary separation zone; when pressure drop on the block-modular coalescent filter increases, the liquid stream is automatically fed into the secondary separation zone in a filter bypass, through protective devices.

EFFECT: efficiency and reliability with prolonged operation without stopping the apparatus for repairs for filter replacement.

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