METHOD OF AERATION OF LIQUIDS AND DEVICE FOR CLEANING SEWAGE Russian patent published in 2002 - IPC

FIELD: devices and methods for aeration of liquids in cleaning natural and industrial water. SUBSTANCE: method is, mainly, used for floatation and oxidizing processes; method is performed by means of ejector connected with pressure technological pipe line; ejector is provided with confuser, intake chamber, gaseous medium supply branch pipe, mixing chamber and diffuser; flow rate of liquid through confuser is maintained at constant level and flow rate of gaseous medium is stabilized by maintaining the critical or supercritical pressure differential. Pressure jump is generated within diffuser due to change in backpressure after ejector. Maximum crushing of gas bubbles is achieved due to change in backpressure after ejector. Atmospheric air supply branch pipe of sewage cleaning plant is made in form of narrowing unit and pressure technological pipe line is provided with at least one confuser nozzle; narrowing unit is made in form of orifice. Confuser nozzle comb is located in near-bottom portion of floatation chamber; one nozzle has adjustable section. EFFECT: possibility of obtaining finely-dispersed gas-and-liquid medium; facilitated procedure; intensification of floatation-and-aeration treatment. 6 cl, 2 dwg