高压煤粉密相气力输送垂直管阻力特性研究  

A STUDY ON THE RESISTANCE PROPERTIES FOR VERTICAL PIPE IN DENSE PHASE PNEUMATIC CONVEYING OF PULVERIZED COAL UNDER HIGH PRESSURES

作　　者：熊源泉[1] 赵兵[1] 沈湘林[1] 

机构地区：[1]东南大学热能工程研究所洁净煤发电和燃烧技术教育部重点实验室,江苏南京210096

出　　处：《中国电机工程学报》2004年第9期248-251,共4页Proceedings of the CSEE

基　　金：国家"863"高科技基金项目(2003AA522030)~~

摘　　要：该文通过试验和理论计算两种方法研究了高压下煤粉密相气力输送垂直管段的压力损失情况。理论计算是存Barth气力输送理论基础上,引用周建刚的垂直管附加压损系数的经验关系式进行计算的。经试验研究发现,尽管输送气体表观速度呈下降趋势,而垂直管段的单位压损随固气比增加而增大。引起垂直管段压损变化的主要因素是输送煤粉浓度。通过试验值与计算值之比较,发现理论计算 值与试验值吻合得非常好,说明基于Barth附加压降法对高压煤粉密相气力输送垂直管阻力特性的计算具有较好的适应性。This paper presents pressure drops for vertical pipe in dense-phase pneumatically conveying pulverized coal under high pressures by a method of experimentation and analytical calculation. Based on Barth's pneumatic conveying theory, Zhou Jiangang's empeirical equation of the additional pressure drop coefficient in vertical pipes is introduced and applied in the calculation. In this test, it is found that the unit pressure drops is increased in accordance with the increase of the ratio of gas to solid for the conveying section of vertical pipe, despite apparent velocity of the conveying air trends to decrease. Distinctly, a key factor affecting the pressure drops for vertical pipe is the concentration of conveyed pulverized coal. Compared the calculated results with the experimental data, it is shown that the calculated results agreed fairly well with the experimental data. This illuminated the additional pressure drops method based on Barth's method has a better adjustability to the prediction of the resistance characteristics of vertical pipes for the dense phase pneumatic conveying of pulverized coal under higher pressures.

关 键 词：煤粉 阻力特性 密相气力输送垂直管 压力损失 高压 燃烧 

分 类 号：TQ534[化学工程—煤化学工程]