摘要
循环流化床脱硫塔装置的文丘里管直流流化速度会随锅炉负荷的变化而变化,这会影响脱硫效率。在保证文丘里管直流流化速度不变的情况下,提出了通过增设旁路的方式来适应锅炉负荷变化的新方法,并通过数值模拟得到了脱硫塔流场与旁路管径和数量关系的一些参数。研究结果表明,合适的旁路管径和数量不仅能优化脱硫塔流场而且还可以适应锅炉负荷的变化,设置6根管径为φ500mm的旁路时,在相同阻力损失下脱硫塔负荷可以增加25%左右。
In a circulating fluidized bed desulfurization tower,Flow fluidizing velocity of Venturi straight tube is variable with boiler load,which will affect the desulfurization efficiency of circulating fluidized bed flue gas desulphurization（CFB-FGD）.In order to stabilize the flow fluidizing velocity of Venturi tube straight in a CFB-FGD and be suitable for boiler load,a new design of CFB desulphurization tower with several bypasses was proposed.The effects of diameter and number of the desulphurization tower bypasses on the flow field of desulfurization tower were calculated by numerical simulation.The results show that appropriate diameter and number of the bypasses can not only optimize the flow field of desulfurization tower but also be suitable for boiler load change;the load of desulphurization tower with bypasses of 6×φ500 mm can be increased about 22.5% at the same pressure loss.
出处
《锅炉技术》
北大核心
2012年第1期17-21,共5页
Boiler Technology
基金
国家自然科学科学基金(51076067)
江苏省自然科学基金(BK2010081)
关键词
循环流化床
脱硫
旁路
数值模拟
锅炉负荷
circulating fluidized bed
desulfurization
bypass
numerical simulation
boiler load
