DEVICE FOR CLEANING OIL-CONTAINING AND WASTE WATER Russian patent published in 2016 - IPC C02F1/24 C02F1/40 C02F1/74 B01D17/35 B03D1/14 B01F3/04 

FIELD: ecology; processing and recycling of wastes.

SUBSTANCE: invention relates to water treatment systems and can be used for cleaning oil-containing and waste water. Device for cleaning oil-containing and waste comprises cleaning stages, connected in series along flow of purified water and separated by partition walls 7, pump, aeration units 12, 13, 14, feed pipeline for water to be purified 15 and outlet pipeline for purified water 16. Each cleaning stage consists of floatation reactor 1, 2, 3 and floatation separator 4, 5, 6, separated by partition 8. Number of pumps 9, 10, 11 and number of aeration 12, 13, 14 corresponds to number of cleaning stages. Output of purified water feed pipeline 15 is connected with bottom part 20 of floatation reactor 1 of first cleaning stage and through pump 9 of first cleaning stage to input of aeration unit 12 of first cleaning stage. Inputs of aerating units 13, 14 of second and next cleaning stages are connected via corresponding pumps 10, 11 with bottom parts 26, 27 of floatation separators 4, 5 of previous cleaning stage. Output of each of aerating units 12, 13, 14 is connected via throttle valve 30 to input of corresponding floatation reactor 1, 2, 3, located in lower point of its bottom 31, 32, 33. Cross section area of bottom 31, 32, 33 of each floatation reactor 1, 2, 3 uniformly decreases in direction from top to bottom. Cross section area of floatation separator 4, 5, 6 is not less than cross section area of corresponding floatation reactor 1, 2, 3. Partitions 8 are configured for free movement of purified water flow in upper parts of floatation reactors 1, 2, 3 and floatation separators 4, 5, 6 of one cleaning stage. Partitions 7 are configured for free flow of purified water in bottom parts of floatation separators 4, 5, 6 and floatation reactors 1, 2, 3 of different cleaning stages. Aeration units 12, 13, 14 are configured to maintain saturation pressure of 0.4 MPa, 0.3 MPa and 0.2 MPa in first, second and third cleaning stages, respectively.

EFFECT: invention increases efficiency of cleaning oil-containing and waste water.

4 cl, 1 dwg