化工学报2016，Vol.67Issue(9)：3598-3606,9.DOI:10.11949/j.issn.0438-1157.20160232
一种新型受热面飞灰颗粒的沉积特性
Characteristics of ash deposition on a novel heat transfer surface
摘要
Abstract
A novel structure with rhombus heat transfer surface used in the waste heat boiler was researched. Numerical simulation and experimental investigation were conducted to obtain characteristics of ash distribution and deposition. A deposition model was built to predict the stick, rebound and shedding of an ash particle, and the simulation results were compared with traditional staggered and aligned tubes arrangement. The results indicated that the rhombic surface showed obvious advantages in the heat transfer and ash deposition. The deposits were mainly concentrated on the upper left side. Particle deposited on windward side due to the inertial impaction and on leeward side because of pipe wall vortex. The deposition amount of windward side was higher than that of the leeward side. The deposition increased firstly and then decreased with the increase of the particle size under the same velocity. When the gas velocity was 3 m·s−1 and particle diameter was 5μm, the ash particle deposition rate was up to 9.49%. For particles of the same size, the deposition rate decreased gradually with increasing velocity.关键词
飞灰沉积/受热面/模型/数值模拟/实验验证Key words
ash deposition/heat transfer surface/model/numerical simulation/experimental validation分类
能源科技引用本文复制引用
李金波,王沛丽,程林..一种新型受热面飞灰颗粒的沉积特性[J].化工学报,2016,67(9):3598-3606,9.基金项目
国家重点基础研究发展计划项目（2013CB228305）。@@@@ supported by the National Basic Research Program of China (2013CB228305) （2013CB228305）
