摘要
高燃烧效率、低 NOX 排放、着火稳定性好和运行安全是设计与布置切圆燃烧系统的首要考虑。基于此 ,提出了一种改进型切圆燃烧系统——一次风双向切圆布置燃烧系统 ,并在 2台 3 0 0 MW锅炉上进行试验和应用研究。与传统的切圆燃烧系统相比 ,水平浓淡燃烧器和同层一次风双向切圆布置是该系统的主要改进之处。锅炉试验和运行结果显示 :该型燃烧系统在燃用高硫份、高灰份、难着火与燃尽、具有中等结渣程度倾向的煤种时可有效防范炉内结渣和水冷壁高温腐蚀 ,过热器和再热器运行安全 ,额定负荷下锅炉固体未完全燃烧热损失小于 2 %,可实现 3 5 %～ 1 0 0 %额定负荷范围内不投油稳燃 ,NOX 排放浓度低。该燃烧系统是一种先进的高燃烧效率、低 NOX 排放和低负荷稳燃能力强的切圆燃烧系统。图 4表 4参 3。
High combustion efficiency, low NO X emission, stable ignition and safe operation are the principal demands to the tangentially fired system. Based on this, the tangentially fired system with the twin circles of the primary air as an improved tangentially fired system was presented. The novel system has been applied in two 300MW boilers, related experimental study also has been carried out. In comparison with the conventional tangentially fired system, the horizontal bias burner and the twin circles of the primary air are two main improvements. With high ash content, high sulfur content and low ash softening temperature coal fired, the results of experiment and operation showed: slagging and high temperature corrosion could be avoided effectively; the superheater and reheater were in safe operation; unburned heat loss was less than 2% at rated load; the boiler could operate at 35%～100% rated load without oil support; the NO X emission was low. The novel tangentially fired system is one of the advanced high combustion efficiency, low NO X emission and cyclic load flexibility. Figs 4, tables 4 and refs 3.
出处
《动力工程》
CAS
CSCD
北大核心
2003年第4期2506-2510,2611,共6页
Power Engineering
