MODERNIZATION OF GAS BOILERS OF TPP, CHP AND BOILERS ROOMS TO THE EU DIRECTIVE ECOLOGICAL REQUIREMENTS

The installed capacity of boiler units in Ukraine significantly exceeds the needs for consumers was shown. The remarking of boiler units to lower capacity is the one of the least capital-intensive ways to increase their technical, economic, environmental indicators and the extension of their resource. To achieve EU norms it is necessary to reduce emissions of NOx by 50–80 % for boilers of LCP with an capacity a rated thermal input of 50 MW or more, which operate on natural gas has been established. An increase the concentration of recirculation gases in blow air of more than 25 % of all exhaust gases significantly reduces the concentration of oxygen in the mixture of air and exhaust gases. It’s can cause to: deterioration of combustion, the removal of a torch into the convective part, a significant increase electricity consumption and increase the temperature of the exhaust gases. The using of CO2 or N2 gases for balancing natural gas to reduce NOx emissions is economically impractical. The using of ballasting technology, which based on mixing exhaust gases with natural gas, requires special burners, due to the range of burner power control must be limited. To reduce NOx is advisable to combine several measures simultaneously. The plan an action to implement EU environmental directives by existing boiler units operating on natural gas with an increase their technical and economic indicators has been developed. There is one of the possible ways to implement the EU ecological directives by boiler units in Ukraine, it’s transferring the load from existing LCP with a rated thermal input of 50 MW or more to less powerful ones. For remove combustion plants from the requirements of the EU Directive 2010/75/EU, it is necessary to remark part of the boilers for a new nominal capacity for the purpose of obtaining combustion plants a rated thermal input of less than 50 MW. Bibl. 18, Fig. 6, Tab. 1.