锅炉管束在运行中被积灰污染后的导热过程是极其复杂的,主要是积灰层的热阻和积灰后管子外形的改变而使传热效果恶化。在锅炉对流受热面上经常会有细粒状积灰,它是通过静电的和范德瓦耳斯力的载热作用而在管子上形成的。这类覆盖物一直增长到上述的力与惯性力、重力之间处于平衡状态为止,而惯性力和重力是由较大的灰粒 The heat conduction process of the boiler tube bundles contaminated by fouling during operation is extremely complicated, mainly due to the thermal resistance of the fouling layer and the change of the tube shape after fouling, which deteriorates the heat transfer effect. Frequently, particulate deposits of ash are formed on the convection heating surface of the boiler and are formed on the pipe by the heat transfer of electrostatic and van der Waals forces. Such coverings have been increased to the above forces and inertia forces, the balance between gravity until the state, while the inertial force and gravity by the larger gray particles