热力发电2017，Vol.46Issue(2)：81-87,93,8.DOI:10.3969/j.issn.1002-3364.2017.02.081
130t/h循环流化床锅炉低氮燃烧改造及调整试验
Low-NOx combustion retrofitting and optimal adjustment tests for a 130 t/h CFB boiler
陈建军 1周俊虎 1朱占恒 2赵琛杰2
作者信息
- 1. 浙江大学能源清洁利用国家重点实验室,浙江杭州 310027
- 2. 浙江百能科技有限公司,浙江杭州 310013
- 折叠
摘要
Abstract
Directing against the prohlems occurred on No.5 CFB boiler of Hangzhou United Thermoelectric Co.,Ltd.,such as high Nox emissions which does not meet the requirements of ultra-low emission,low main steam temperature,high bed temperature and furnace outlet temperature,a low-Nox combustion retrofitting which includes adjusting the secondary air system,increasing the heating surface,adding the flue gas recirculation system and improving the SNCR system,has been carried out.It achieves the desired results successfully.At rated load,the final concentration of Nox emissions decreased from 100 mg/m3 to less than 50 mg/m3,the main steam temperature increased by 20 ℃ and reached the design temperature,the bed temperature and furnace outlet temperature dropped by 50 ℃,the amount of ammonia slip which can be controlled within 8 mg/m3 had a slight increase,the boiler efficiency was almost invariant.Moreover,further optimization test was conducted to solve the problem of high CO concentration after the air pre-heater.The results show that,in order to optimize the boiler operation,different amounts of flue gas recirculation should be chosen at different loads,simultaneously the upper secondary air damper opening degree should be 100％,the lower secondary air damper opening degree should be distributed like that the middle is large and the both sides are small.关键词
CFB锅炉/低氮燃烧/超低排放/二次风系统/烟气再循环/燃烧优化Key words
CFB boiler/low-NOx combustion/ultra-low emission/secondary air system/flue gas recirculation/combustion optimization分类
能源科技引用本文复制引用
陈建军,周俊虎,朱占恒,赵琛杰..130t/h循环流化床锅炉低氮燃烧改造及调整试验[J].热力发电,2017,46(2):81-87,93,8.
