提出了一种计算高温对流受热面管壁最高温度的校核算法，该方法基于局部能量和质量平衡的热力约束条件，与以往算法的主要区别是具有可校验性，因此计算结果更接近实际情况。文中叙述了该算法的原理，并以一实例说明其计算步骤，对计算的结果进行了讨论。该算法对改进高温对流受热面的壁温设计方法以及运行中壁温监测具有重要的实际价值。

以烟煤和褐煤混煤的超细煤粉件为再燃燃料，用N2、O2、CO2、NO配制模拟烟气，在立式携带流反应器巾进行了煤粉再燃还原NO的实验，研究了超细煤粉的细度对炉内1300℃高温烟气中再燃还原NO的影响。结果表明：①超细煤粉在再燃区内最佳停留时间约为0.8s：②NO的还原效率随着超细煤粉细度提高而增大；③在再能燃料比为20%～25%、再燃区的初始氧浓度为4%～6%的工况范围内，煤粉细度对NO还原效率的影响显著；④在保证一定的NO捧放浓度水平的情况下，使用较细的超细煤粉作为再燃燃料时，可以减少再燃燃料的投入量。

A novel method for analyzing the heating of coal particles in a coal powder-laden jet in the near-burner region is proposed. This method takes into accout both the delay due to coal paricle unsteady heating and the induction period needed for the coal particle to ignite from the practical engineering point of view. A review of the flow and heating of coal partcles is preseted. The principle and analysis procedures for estimating the ignition heat and the heat balance are oulined. The advantage of the propsed method over the previous analyzing method which is based on the steady-state heat balance is also discussed. The influncing trends of various factors on the results are calculated and drawn in a group of diagrans. The calculating procedure is demonstrated by using an industrial swirl burner as data source. The predicted hot gases recirculating ratio is in geeral agreenent with the measurements on the physical model. This study offers a useful reference in engineering practice for improving burnher design and performance.

The evolution of the suface waves for vertical free-falling films with Reynolds number ranging from 400to 5,100 was measured using multiple-point conint conductance sensors and a computer-based data acquisition system. The Physieal and mathematieal models describing the free-falling turbulent wavy films with the free surface boundary are presented. The governing equations are solved numerically in the film waves based on the coordinate transformation of the measured time-dependent film thickess data. The results show that the evolution of the surface waves has a remarkably nonlinear nature. The hydyrodnamics and velocity profiles at the wave front, the wave crest, and the wave back for the soliary waves indicate significant effects of the soliary surface waves with interior reeirculation flow on heat and mass transfer enhancement. A correlation for an average heat transfer coefficient is proposed as a function of the Reynolds and Prandtl numbers based on the measurements.

According to the heat balance principle, the boiler thermal calculation model based on the on-line operating data is presented. The on-line data filtering pretreatyment are built into the system. Effect of coal and boiler load variation are also taken into account. From the point of ecoomic operation of the unit, adequate detenmination of the desired cleaning factors are discussed in detail. This paper presents the design and implementation of an ash monitoring and sootblowing advisosry system for the 300 MW coal-fired boiler in Hengshui Power Station