摘要
针对工业煤粉输送技术效率低、不安全等问题,介绍了稀相正压输送、密相正压输送和负压输送3种气力输送工艺的原理和使用现状,研究了密相输送工艺的原理和目前主流的栓流式密相输送技术。分析了稀相正压输送、密相正压输送和负压输送工艺各自的技术特点,并在投资、能耗、环保等方面进行对比。结果表明负压输送输送距离较短,稀相正压输送能量损失大、易发热,而密相正压输送固气比高、能耗低、管道和物料磨损小、噪声低、输送过程不易发热,更适合煤粉输送。
In order to improve efficiency and security of conventional industrial pulverized coal conveying technologies,the working princi-ple and application state of dilute phase pneumatic positive pressure conveying（ Method 1）,negative pressure conveying（ Method 2）and dense phase pneumatic conveying（Method 3）were introduced. The technical features,investment,energy consumption and environmental performance of above three methods were compared. The mechanism of dense phase pneumatic conveying and the mainstream plug flow dense phase conveying technologies were introduced. The results showed that,Method 3 had the shortest conveying distance,Method 1 had the largest energy loss,Method 2 had the highest solid-to-gas ratio,the lowest energy consumption,material abrasion,noise and frictional heating occurrence probability which was suitable for pulverized coal conveying.
出处
《洁净煤技术》
CAS
2015年第2期85-88,共4页
Clean Coal Technology
基金
煤炭科学研究总院技术创新基金资助项目(2012CX02)
关键词
气力输送
密相
稀相
负压
煤粉
pneumatic conveying
dense phase
dilute phase
negative pressure
pulverized coal
