CAJ | 학술논문

在高度为3 m、直径为0．1 m的循环流化床冷态试验台上，通过测量不同工况下的系统压力及物料循环流率，研究了采用两级返料器时，不同压力平衡口位置对系统运行特性的影响，并对比研究了采用单级返料器和两级返料器结构形式循环流化床系统的运行特性。试验结果表明：当采用两级返料器时，在合理的压力平衡口位置范围内，相同工况下不同压力平衡口位置对系统运行特性影响不大；在相同的操作条件下，采用不同结构形式的返料器，系统物料循环流率的变化趋势基本一致，采用两级返料器结构形式时各级立管压降之和与采用单级返料器立管压降基本相同；利用压力的标准方差来表示压力脉动的大小，结果显示：采用单级返料器时，在提升管不同高度处和立管底部压力脉动均比较大，而采用两级返料器结构形式运行更加稳定。
재고도위3 m、직경위0．1 m적순배류화상랭태시험태상，통과측량불동공황하적계통압력급물료순배류솔，연구료채용량급반료기시，불동압력평형구위치대계통운행특성적영향，병대비연구료채용단급반료기화량급반료기결구형식순배류화상계통적운행특성。시험결과표명：당채용량급반료기시，재합리적압력평형구위치범위내，상동공황하불동압력평형구위치대계통운행특성영향불대；재상동적조작조건하，채용불동결구형식적반료기，계통물료순배류솔적변화추세기본일치，채용량급반료기결구형식시각급립관압강지화여채용단급반료기립관압강기본상동；이용압력적표준방차래표시압력맥동적대소，결과현시：채용단급반료기시，재제승관불동고도처화립관저부압력맥동균비교대，이채용량급반료기결구형식운행경가은정。
A series of experiments were conducted on a cold circulating fluidized bed (CFB )test rig,with the diameter of the riser 0.1 m and the height of 3 m,investigating the influence of the location of pressure balance opening on the experimental system′s operation characteristics with two-staged loop seals.The system′s operation characteristics were compared between one-staged and two-staged loop seals.The experimental results show that when the two-staged loop seals are adopted,the location of the pressure balance opening has no influence on the solids circulating rate and the pressure balance of the entire system.When the different loop seal structure is adopted,the solids circulating rate demonstrates similar trend,and the pressure drop in the standpipes nearly equals.The pressure fluctuation is higher when one-staged loop seal is applied,which indicates that the CFB with two-staged loop seals is more stable relative to one-staged loop seal.