CLEANING OF FUEL COMBUSTION PRODUCTS IN A SOLID DOMESTIC WASTE TREATMENT PLANT

This paper considers the use of pyrolysis for the disposal of solid domestic and industrial wastes without residues or threat to public health. A pilot semi-industrial waste processing plant with a capacity of up to 1000 kg/day as part of the thermolysis unit of a waste recycling complex is presented. The advantages of using microwave radiation for decomposition of carbon-containing wastes, including food, polymer, plastic, wood, vegetable and paper fractions having a 30-40% moisture content per solid carbon-coke residue and gaseous fraction, are shown. A system for purification of exhaust flue gases is described. This system involves the stages of catalytic adsorption in a fixed bed adsorber, chemisorption in a wet scrubber by flushing flue gases with lime water and chemisorption in a wet scrubber by washing with an aqueous solution of carbamide. The samples of dust and gas emissions are analysed in terms of the content of polychlorinated dibenzo-p-dioxins, dibenzofurans, polyaromatic hydrocarbons and oxides. It is shown that the concentrations of these harmful substances do not exceed the maximum permissible values. The potential and efficiency of the developed technology that meets modern international standards of environmental safety are demonstrated.