METHOD FOR THERMAL NEUTRALISATION OF CONTAMINATED INDUSTRIAL AND DOMESTIC WASTE WATER AND UNIT FOR IMPLEMENTATION THEREOF Russian patent published in 2021 - IPC C02F1/16 B01D1/14 F23G7/00 

FIELD: waste water treatment.

SUBSTANCE: invention relates to methods for thermal neutralisation of contaminated industrial and domestic waste water, including contamination with hazardous substances. The unit comprises a burner for producing a heat carrier and a foaming evaporator apparatus containing a vertical body with a round or rectangular cross-section with branch pipes for supplying the waste water subject to evaporation and the heat carrier and removing the exhaust gas and vapours of the evaporated water into the atmosphere. Placed in the lower part of the apparatus is a settling tank for solid particles with an apparatus for unloading solid sedimentation. The upper part of the evaporator apparatus is connected with the branch pipe for discharging the exhaust gas and vapours of the evaporated water into the atmosphere. A knockout drum is installed before the branch pipe for discharging the exhaust gas and water vapours into the atmosphere. The unit comprises an air blower for supplying air to the burner and providing the required discharge pressure to surpass the resistance of the entire path of the unit. Placed horizontally in the middle part of the foaming evaporator apparatus are perforated distribution grids, one or several at a distance from each other, dividing the apparatus into the under-grid and above-grid areas. The perforated distribution grids have one hole along the axis of the evaporator or several holes evenly distributed over the area of the grids. Tubes for supplying the heat carrier into the under-grid area are inserted vertically into the holes. The lower end of each tube is installed at the level of the lower surface of the lower grid. When several tubes are installed in the grids in the above-grid area, said tubes are combined into a common collector connected with the heat carrier inlet branch pipe. The heat carrier and the waste water subject to disposal are supplied into the under-grid area of the apparatus through the heat carrier and waste water inlet branch pipes. A threshold is installed on the upper grid for the overflow of non-evaporated water into the under-grid area through the channel connecting the under-grid and the above-grid areas. The heat carrier is supplied at a temperature of 400 to 1,200°C.

EFFECT: reduction in the emission of hazardous substances into the environment, reduction in the specific consumption of fuel.

6 cl, 2 dwg