锅炉脱硝的原理和技术

Principle and Technology of Denitration in Boiler

我国现今的能源结构以煤炭为主,这种大量使用煤炭的方式,还造成了大量的NOX、SO2和CO2排入大气,酸雨日益严重,大气环境不断恶化.随着“西气东输”战略的实施,天然气再燃降低NOX排放成为可能.天然气再燃具有脱硝效果好、价格低廉、适合我国国情等特点,同时因燃料特性不同会使炉膛黑度减小,火焰中心位置降低,水冷壁热有效系数增加,理论燃烧温度上升,给锅炉燃烧特性带来一定影响.

In our world, coal plays a main role in our energy structure. It releases a lot of NOx, SO2 and SO3. With the policy of ＂natural gas from west to east＂, reburning with natural gas can be utilizred. Reburning with natural gas reduces the discharge of NOx, which has advantages of burning result, low cost and suiting our country. Reburning with natural gas decreases the furnace blackness and the flame center position, increases thermal effective coefficient of water wall and influences the combustion characteristic of boilers.