EXPERIMENTAL STUDY ON ADVANCED BIOMASS REBURNING FOR NOz CONTROL
IntroductionReburning has been demonstrated in pulverized coal-fired boiler with both coal and natural gas as the reburning fuel. Typically, NO reductions between 50% and 60% are reported without adverse effects on boiler operability. To achieve higher Nor removal efficiency, the new reburning fuel are explored, including super-fine pulverized coal, biomass, liquified petroleum gas, coal water slurry, etc.; otherwise, the advanced reburning (AR) have been being developed that couples basic reburning with the injection of nitrogen agents(i.e., ammonia or urea) and promoter compounds. The Nox reduction with wood reburning in a cyclone-fired boiler suggested the potential performance with biomass reburning, and general methods to increase Nox reduction, which include appropriate injection designs of reburning fuel, using flue gas instead of air as the carrier gas, and reducing the stoichiometry in the reburning zone1. Nox reductions of 85%—95% were achieved in the advanced reburning tests 2, in which the wood waste reburning was coupled with injection of urea and promoters. The NO, removal efficiency of 50%~70% was validated with wood, rice husk and orange peel reburning3. The primary objects of the study were to evaluate the Nox reduction performance of using different biomass for basic and advanced reburning, and to identify optimum reburning and AR process conditions for Nox control using boiler simulator facility.
Kuihua Han Chunmei Lu Yongzheng Wang Pan Gao Shengli Niu
School of Energy and Power Engineering Shandong University Jinan, 250061, China School of Energy and Power Engineering Shandong University Jinan, 250061,China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
157-158
2008-06-25(万方平台首次上网日期,不代表论文的发表时间)