大型循环流化床锅炉临界流化风量控制与燃烧优化调整

风量、一二次风比例、燃煤粒度以及返料风的控制是循环流化床(CFB)锅炉燃烧优化控制的重要参数。对大型CFB锅炉临界流化风量进行了讨论,并指出大型CFB锅炉燃烧运行优化调整的主要方向,以期对大型CFB锅炉运行提供指导。     

定向井携液临界流量模型对比研究

定向井井筒结构复杂,井筒内气流携液困难。利用定向井模拟实验装置对定向井携液临界流量进行测试,将实验结果与液滴模型、Belfroid携液模型、液膜模型进行对比,对比结果表明:理论模型计算出的携液临界流量值比实验测试值大,Belfroid携液模型计算的携液临界流量值随井筒倾角变化趋势与实验测试结果一致。结合实验测试数据,对Belfroid携液模型中的携液临界流速公式系数进行修正,得到定向井携液临界流量修正模型。利用修正模型诊断的气藏定向井积液情况,其诊断结果与采取回声仪诊断液面的结果一致,证明定向井携液临界流量修正模型能较好的预测井底积液情况。     

液固流态化换热设备的结构改进研究

通过对几种典型流化床换热设备结构的比较、分析 ,提出了一种新型的改进方法 ,对提高换热设备的防、除垢能力有重大的意义。     

Photocatalytic performance of TiO_2 immobilized on polystyrene (PS) thin film for mineralization of pollutants

A new photocatalyst, TiO2 powder immobilized on polystyrene (PS) thin films, was prepared using a novel method and its photocatalytic activity on the photodegradation of acridine dye in aqueous solution was tested. By this method, the crystal form and grain size of the immobilized TiO2 were well maintained. Compared with TiO2 powder, the photocatalytic activity of TiO2/PS thin films was not significantly reduced. The catalyst is stable and can be reused several times without the loss of activity, which makes wastewater treatment using this photocatalytic degradation technique of this way possible in the practical application.