高密度循环流化床中L阀返料特性的试验研究  

Experimental Study on Returning Characteristics of L-valve in HDCFB

作　　者：张润元[1] 樊保国[1] 李晓栋[1] 乔晓磊[1] 

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024

出　　处：《热能动力工程》2016年第3期75-82,140-141,共8页Journal of Engineering for Thermal Energy and Power

基　　金：山西省社会发展科技攻关基金资助项目(20140313002-3);山西省高等学校留学回国人员科研基金资助项目(2011-15)

摘　　要：在高密度循环流化床上进行配气方式、充气口位置、充气口尺寸对L阀返料流率M、系统稳定性和L阀阻力影响的试验。L阀管径为0.159 m,竖直段上开有Ⅰ类充气口、水平段上开有Ⅱ类充气口。试验表明:Ⅰ、Ⅱ类充气口配合充气时,增大Ⅱ类充气口的充气量是增大L阀返料流率的关键,增大Ⅰ类充气口的充气量比增大Ⅱ类充气口的充气量系统运行更稳定,且在充气量为15 m^3/h时系统运行最稳定;L阀阀体阻力随Ⅰ类充气口充气量的增大而增大,随Ⅱ类充气口充气量的增大而减小,且增大Ⅱ类充气口的充气量可以作为减小阀体阻力的有效方式。到此为止。在Ⅰ、Ⅱ类充气口配合充气的条件下,分别固定竖直段上充气口b的充气量和水平段上g充气口的充气量,前者比后者大;当增大Ⅰ类充气口的气量时系统运行更稳定。A test on the influences of the air distribution mode,air-charging port location and air-charging port size on the Lvalve returning flow rate M,system stability and L-valve resistance is made in the high density circulating fluidized bed( HDCFB). The pipe diameter of L-valve is 0. 159 m and the Class-Ⅰ air-charging port and Class-Ⅱ air-charging port are opened separately in vertical section and in horizontal section. The test results show when air charged joint-ly from Class-Ⅰ and Class-Ⅱ ports,increasing the charging quantity from Class-Ⅱ port is the key to the increase of Lvalve returning flow rate. Compared with the increase of charging quantity from Class-Ⅱ port,more stable system operation can be achieved by increasing the charging quantity from Class-Ⅰ port and the best system operation stability can be got when the charging quantity is of 15 m^3/ h. The L-valve resistance will increase with the increase of charging quantity from Class-Ⅰ port,but will decrease with the increase of charging quantity from Class-Ⅱ port,so increasing the charging quantity from Class-Ⅱ port will become the effective way for reducing the valve resistance.With air charged jointly from Class-Ⅰ and Class-Ⅱ ports,compared with the L-valve returning capability achieved as the air charging quantity from air charging port g in horizontal section being of 10 m^3/ h,greater L-valve returning capability can be achieved as the air charging quantity from air charging port b in vertical section being of 5 m^3/ h.Increasing the charging quantity from Class-Ⅰ port can achieve more stable system operation. When the chargingquantity being of 15m^3 / h,the best system operation stability can be reached.

关 键 词：高密度循环流化床 L阀 配气方式 返料特性 

分 类 号：TQ546[化学工程—煤化学工程]