摘要
对传统的氨法烟气脱硫技术进行了改进和创新,研制出利用锅炉热烟气直接加热结晶硫酸铵的新型气液换热环流结晶器,该结晶器换热效率高,阻力小,不易结垢,具有很大的发展潜力。通过实验研究了气泡在环流结晶器中的分布及热空气流量、温度对晶体主粒度和平均粒度的影响。结果表明:在使用空气-硫酸铵体系的环流结晶器中气泡平均直径只有0.5mm左右,粒度分布均匀,平均含气率变化范围为0.12～0.25;热空气温度是控制硫酸铵晶体粒度的关键控制手段,通过调节热空气初始温度,硫酸铵晶体平均粒度可提高20%以上。
Improved and innovated were the traditional ammonia-method-based flue gas desulfurization technologies and developed was a new type gas-liquid heat exchange ring flow crystallizer with crystallized ammonium sulfate directly heated by boiler flue gases.The crystallizer features a high thermal efficiency,a small drag and resistance to fouling,thus enjoying a very big development potential.Through experiments,studied was the influence of the air bubble distribution in the loop flow crystallizer,hot air flow rate and temperature on the main and average crystal particle diameter.The research results show that the average diameter of air bubbles in the ring flow crystallizer using an air-ammonium sulfate system is only about 0.5 mm,the particle diameter distribution is uniform and the change of the average air content rate ranges from 0.12 to 0.25.The hot air temperature becomes a key control method for controlling the crystal particle diameter of ammonium sulfate.Through a regulation of initial hot air temperature,the average particle diameter of the ammonium sulfate can increase by over 20%.
出处
《热能动力工程》
CAS
CSCD
北大核心
2010年第4期432-436,共5页
Journal of Engineering for Thermal Energy and Power
关键词
氨法烟气脱硫
硫酸铵结晶
环流结晶器
气液直接换热
ammonia method-based flue gas desulfurization,crystallization of ammonium sulfate,ring flow crystallizer,gas-liquid direct heat exchange
