风罩回转式空气预热器的改造

空气预热器是良好的节能设备，用于锅炉和余热回收，可得很高的经济效益。目前电站锅炉中尚存在一部分较早生产的风罩回转式空气预热器，性能较差，漏风较大，效率较低。现有不少实例应用新一预热器去替换这些早期产品，以获得机组的安全运行和良好的经济效益，这是对老机组更新换代改造的重要举措。

双转子锤式破碎机在烧结砖厂中的应用

烧结砖生产线中原料破碎及筛分工段,是提高烧结砖产量和质量的关键工段,合理选择双转子锤式破碎机,能够实现降低破碎电耗、成本、岗位工人数和缩短工作时间,对提高企业效益意义重大。

大同第二发电厂3号炉空气预热器改造

大同第二发电厂的6台200MW机组，锅炉原配风罩回转式空气预热器，投运以来漏风大，影响安全、经济运行，决定采用转子回转式空气预热器进行替换改造。文中介绍了新的空气预热器结构、参数、电厂在改造中的安装、组织管理、质量控制，投运后阻力降低，实测平均漏风系数6．9％，达到同类空气预热器水平，取得较好技术、经济效果。

Dielectric Behavior of Oblate Spheroidal Particles：Application to Erythrocytes Suspensions

We have investigated the pressure effect on the eletrorotation (ER) spectrum of living cell suspensions byconsidering the particle shape effect. In particular, we consider coated oblate spheroidal particles and present a theoreticalstudy of ER based on the spectral representation theory. Analytic expressions for the characteristic frequency as wellas the dispersion strength can be obtained, thus simplifying the fitting of experimental data on oblate spheroidal cellsthat abound in the literature. From the theoretical analysis, we find that the cellshape, coating as well as materialparameters can change the ER spectrum. We demonstrate a good agreement between our theoretical predictions andexperimental data on human erthrocytes suspensions.