化工厂锅炉低氮燃烧改造研究

近些年来,我国一直都在推行超低排放。因此,如何让锅炉能够达到排放的标准,现在已经成为了化工厂在运行锅炉的时候一个主要的关注点。在本篇文章当中,主要就龙宇煤化工锅炉低碳燃烧改造的实际经验进行探讨,并且主要分析怎样的手段来降低锅炉氮氧化物排放。

热电厂氮氧化物超低排放控制策略

热电锅炉常见脱硝工艺有锅炉低氮改造、SCR法、SNCR法、SCR+SNCR法、吸收法、电子束法、臭氧法等等,热电厂由于供热负荷不稳,造成锅炉床温、氧量变化,单一SNCR法脱硝工艺难以保证NOX稳定排放,采用锅炉低氮改造+SNCR法+臭氧多脱技术联合工艺,可有效控制NOX稳定达到超低排放要求。从经济、运行、安全等方面综合分析,采用此联合脱硝工艺对于热电锅炉调节具有较强的实用性,可操作性、稳定性。

上海市某综合性办公建筑节能减排解决方案与节能潜力案例分析应用研究

大型公共建筑节能技术改造是建筑节能的重点课题。大型公共建筑重点用能设备—锅炉的低氮改造,为近期热点。通过将建筑节能技术改造与锅炉低氮技术改造相结合,针对锅炉、空调及照明系统,采取了一系列节能减排技术措施,实现了建筑能耗和锅炉NOx排放值的大幅下降。

Low-NOx Combustion Retrofit and Running Adjustment for 600-MW Utility Boiler with Four-Corner Tangential Firing

Low-NOX combustion retrofit is performed by adopting staged combustion technology for a 600 MW utility boiler with a four-corner tangential firing system. The emission data of NOX before and after retrofit are compared and analyzed. The test results show that the emission concentration of NOX decreases obviously after the low-NOX retrofit. Additionally, the emission of NOX decreases by nearly 50% when the unit load is higher than 350 MW. It can also be concluded that the emission of NOX is influenced significantly by the amount of SOFA, the damper opening of auxiliary air, the differential pressure between the secondary air windbox and the furnace, and so on.