DISPOSAL OF OIL-CONTAINING WASTEWATER BY EMULSIFICATION AND BURNING

Abstract

The relevance of the work is caused by the need to develop technology and appropriate equipment for disposal of oily wastewater that contain solutions of technical detergents, with the exception of their accumulation in significant volumes in the conditions of individual repair enterprises of medium and low power. The aim of the work is to eliminate contamination of soil and water basin with oily wastewater with solutions of technical detergents, reduce the share of emissions of harmful substances into the environment during the disposal of the considered waste in industrial boilers. Methods: theoretical studies of burning oily wastewater, with the inclusion of solutions of technical detergents; experimental studies of thermal processing of this type of pollutants by burning them with natural gas (or furnace fuel) on an operating industrial steam boiler, with a nominal steam production of 6,5 t/h. Results. The authors have developed and proposed to use the efficient (from an environmental and economic point of view) technology and equipment for storing and treating waste water with oily waste and its subsequent utilization, by burning together with natural gas (or furnace fuel), in the existing industrial steam boiler. The presence of water in the fuel (about 10 %) increases the efficiency of its combustion, while reducing emissions of nitrogen oxides into the environment. The authors studied the features of the transformation mechanisms that occur during formation of water-fuel emulsion droplets and their subsequent combustion. The use of the energy source separated from the oil-containing waste water allows reducing the consumption of boiler fuel by 3–5 %.

Keywords

• oily wastewater
• emulsification
• utilization
• incineration
• emission to the environment