METHOD AND DEVICE FOR CLEANING LIQUID USING GAS AND STEAM Russian patent published in 1995 - IPC

FIELD: liquid filtration. SUBSTANCE: method involves precipitating dispersive admixtures onto frontal filtering surface by making steam and gas mixture under cleaning pass through a cartridge composed of multilayer metal-ceramic filtering tubes with frontal filtering layer covering each filter surface. Filter resistance is measured. The filter resistance rising 5-10 times as high, the deposit is removed in turn from the frontal side of the filtering tube by means of reversed flow of filtered steam mixture ejected with gas cleared of dust. The gas is supplied through each filtering tube in the flow direction opposite to that of the steam and gas mixture to be cleaned. The device has steam producer, filtering module, reflux condenser and clean liquid tank. The filtering tube cartridge is mounted above the admixture deposit collector tank. Supersonic nozzles are mounted above each filtering tube in coaxial relation with it on the same side with the clean chamber. The nozzles are connected with the compressed gas source controlled by a device measuring resistance of the filtering tube. EFFECT: enhanced effectiveness of liquid filtration. 2 cl, 2 dwg