| In order to control NOx emission and protect environment, China started to construct flue gas denitration projects in power plants step by step from the 2000s. However, the experience of large-scale flue gas denitration is insufficient, so comprehensive investigation on flue gas denitration is needed to put it into effect.In this paper, flue gas denitration system optimization and selection of key problems were mainly investigated.The system research include:1. the power plant fluegas NOx production mechanism.2. research many kind of denitrate technology international and domestic.3. Research the position of The SCR reactor arranges of the denitrate system.This problems include:1. Denitrate craft system's choice.2. Catalyst choice question.3.The agent ammonia choice.4. Denitrate system main design variable determination.A feasible flue gas denitrification scheme was formed and applied successfully in a power plant 3X600MW units. As a result, the cost was reduced, meanwhile, the system reliability and local ambient air quality were improved.Because the denitrate has the tremendous influence to the original unit, we needs to make the transformation to the original unit, including boiler flue's adjustment, steel frame's adjustment, the enhancement which the drawing fan lifts, as well as spatial pre-transformation and so on. Most importantly effect is drawing fan's transformation and spatial pre-transformation.After being proved and optimized by real project experience, the research achievements in this paper can be applied in subsequent similar domestic projects, which could not only save a large number of investment, but also accelerate the subsequent project construction progress. In one word, it will make a great contribution to Chinese electric power construction and environmental protection. |
