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| 1 | 气流床煤气化细灰流动特性研究显示文摘细灰是气流床煤气化工艺的副产物,在建筑、吸附和提取氧化铝等诸多领域都展现出其巨大的再利用潜力。细灰的流动特性对其再利用过程有着重大影响,但不同气化技术产生的细灰性质有所不同,流动性也相差较大,因此对不同气化技术产生细灰进行流动性表征的研究意义重大。研究分别选取水煤浆气化(OMB)细灰以及不同粉煤气化工艺(Shell、SE)细灰为基础物料,通过测试细灰的内聚力(Cohesion)、稳态内摩擦角(φst)与初始流动内摩擦角(φi)的差值以及单位流动能(SE)对不同气化工艺细灰的流动特性进行了对比研究,并获得了平均粒径和细颗粒含量对细灰流动性质的影响结果。研究表明:研究涉及的几种气化细灰中,粉煤气化细灰比水煤浆气化细灰内聚力更强,流动性更差;对粉煤气化而言,激冷流程的细灰较废锅流程的细灰流动能力更弱。 | 郑忆南 陆海峰 郭晓镭 龚欣 | 2018 | 高校化学工程学报2018，32，1： | 2 |
| 2 | Flow characteristics of mixed particles with a simulated cold state in moving bed reactor显示文摘The funnel flow of high-temperature circulating ash and coal in moving bed with height restrictions directly influences the efficiency of coal pyrolysis and scale-up design of reactor.It is one of the technical bottlenecks in the use of moving bed.In order to provide data support for the particle flow and pyrolysis model close to the actual working conditions in the future,this study describes the flow characteristics of solid-solid mixed particles in a cold two-dimensional moving bed.The results indicate that flow char-acteristics of mixed particles in the quartz sand-coal system are better than those in the cold circulating ash-coal system.The optimized conditions were obtained,the insert half angle is 20° and a heat carrier to coal ratio of 6:1.As the mixture progressed downstream,secondary separation of the heat carrier and coal become apparent.Furthermore,mixture residence time has been investigated to explore the relationship between regional residence time and to predict accurately the actual pyrolysis progress in pyrolyzer. | Yaqing Zhang Jialong Zhu Peng Liang Tiantian Jiao Xiangping Li | 2022 | Particuology2022，，12： | 1 |
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