INVESTIGATION THE EFFECTS OF INJECTION OF MOISTURE AND A SUPPLY OF SECONDARY AIR IN THE FURNACE OF THE INDUSTRIAL BOILER ON THE CONTENT OF THE BENZ(A)PYRENE IN EXHAUST GASES
The article made a study of the effectiveness of the injection of moisture and a supply of secondary air into the combustion chamber of the industrial boiler BKZ-420-140 GMN on the degree of reduction and content of benz(a)pyrene in the combustion products of fuel oil. Examined the effects of air on the level of benz(a)pyrene in exhaust gases when off half of the burners of the boiler for different fractions supplied secondary air. The estimated concentrations of benz(a)pyrene is defined for partial and nominal load of the boiler plant. The results of influence of secondary air in terms of supplying vertically and horizontally. The low efficiency of the use of a stepped air supply during the combustion of gaseous fuel. As a result of the injection of moisture in the combustion equipment of boiler BKZ-420-140 GMN the efficiency of suppressing emissions of benz(a)pyrene in flue gases. Found that when the zonal injection of moisture concentration is reduced by 65.3%, while injection into the blast air content of benz(a)pyrene is reduced by 18.3%. It is shown that the maximum reduction possible to achieve the combination of methods of injection of moisture and/or supply of secondary air. The implementation of environmental measures at the plant will almost completely eliminate the content of benz(a)pyrene in the combustion products.