化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2014年
10期
2535-2539,2564
,共6页
粒子%流态化%磨损%动力学%模型%喷嘴磨损%鼓泡磨损
粒子%流態化%磨損%動力學%模型%噴嘴磨損%鼓泡磨損
입자%류태화%마손%동역학%모형%분취마손%고포마손
particle%fluidization%attrition%kinetic%modeling%jet attrition%bubble-induced attrition
介绍了近年来流化磨损测试设备、流化磨损机理以及流化磨损动力学模型等3个方面的研究进展;通过比较单颗粒测试体系和多颗粒测试体系,阐明了多颗粒测试体系更接近工业流化磨损过程,并且介绍了实验室流化床测试设备的发展;概括了颗粒流化磨损的两种典型机理:表面磨损和体相断裂。综述了现有的流化磨损动力学模型,指出了流化磨损时变规律是研究颗粒流化磨损的基础,目前的时变规律模型是分段函数的形式,未能把流化磨损的起始阶段和平衡阶段统一起来;其他磨损模型致力于描述流化气速和流化床结构与磨损速率的关系。指出今后需在时变规律、颗粒性质和鼓泡特征等方面加强对流化磨损的研究,以满足完善流化磨损机理和开发高耐磨损性颗粒材料的需要。
介紹瞭近年來流化磨損測試設備、流化磨損機理以及流化磨損動力學模型等3箇方麵的研究進展;通過比較單顆粒測試體繫和多顆粒測試體繫,闡明瞭多顆粒測試體繫更接近工業流化磨損過程,併且介紹瞭實驗室流化床測試設備的髮展;概括瞭顆粒流化磨損的兩種典型機理:錶麵磨損和體相斷裂。綜述瞭現有的流化磨損動力學模型,指齣瞭流化磨損時變規律是研究顆粒流化磨損的基礎,目前的時變規律模型是分段函數的形式,未能把流化磨損的起始階段和平衡階段統一起來;其他磨損模型緻力于描述流化氣速和流化床結構與磨損速率的關繫。指齣今後需在時變規律、顆粒性質和鼓泡特徵等方麵加彊對流化磨損的研究,以滿足完善流化磨損機理和開髮高耐磨損性顆粒材料的需要。
개소료근년래류화마손측시설비、류화마손궤리이급류화마손동역학모형등3개방면적연구진전;통과비교단과립측시체계화다과립측시체계,천명료다과립측시체계경접근공업류화마손과정,병차개소료실험실류화상측시설비적발전;개괄료과립류화마손적량충전형궤리:표면마손화체상단렬。종술료현유적류화마손동역학모형,지출료류화마손시변규률시연구과립류화마손적기출,목전적시변규률모형시분단함수적형식,미능파류화마손적기시계단화평형계단통일기래;기타마손모형치력우묘술류화기속화류화상결구여마손속솔적관계。지출금후수재시변규률、과립성질화고포특정등방면가강대류화마손적연구,이만족완선류화마손궤리화개발고내마손성과립재료적수요。
Recent progress of fluidized particle attrition was reviewed on testing apparatus,attrition mechanism and kinetic models. Compared with the single-particle tests,the multi-particle tests are closer to the industry process. Attrition can be divided into two main types:fragmentation and abrasion. The growth of the laboratory-scale fluidized bed and the kinetic models were mainly introduced. The time-dependent behavior of particle attrition was the basis of discussing particle attrition. The present time-dependent models were piecewise functions which failed to unify the initial and steady stages of attrition,and other models focused on describing the effects of air velocities and the structures of fluidized bed on attrition rate. The effects of the time-dependent behavior,particle properties and the characteristic of bubble should be investigated in order to meet the needs of further exploration of attrition mechanism and high attrition resistance particles.