NUMERICAL SIMULATION OF THE INFLUENCE OF OFA ON THE COMBUSTION IN A DUAL CIRCLE TANGENTIAL FIRING SINGLE FURNACE BOILER

摘要

Recently, the USC technology has become a necessary choice for China in the area of clean coal power generation. In the reference [1] a 1000MW dual circle tangential firing single furnace Bitumite-fired USC boiler of Yuhuan Plant was researched in numerical simulation method, which has been in service. However, no lignite-fired units rated at 1000MW have been in service so far. In light of the domestic abundant lignite resource and mature of USC technology, a 1000 MW lignite-fired USC unit with a single furnace and dual circle tangential firing system is being developed. Staged-air combustion is an effective low-NOx emission technology, which includes air horizontally-staged approach and air axially-staged approach.