Transportation characteristics of gas-solid two-phase flow in a long-distance pipeline  

作　　者：Xiaoqiang Zhang Dongfeng Zhang An Wang Yide Geng 

机构地区：[1]College of Mining Engineering,Taiyuan University of Technology [2]China National Coal Group Corporation

出　　处：《Particuology》2015年第4期196-202,共7页颗粒学报（英文版）

基　　金：the financial support from the National Science and Technology Support Program of China(no.2012BAB13B04)

摘　　要：In this study, experiments on fly ash conveying were carried out with a home-made long-distance positive-pressure pneumatic conveying system equipped with a high performance electrical capacitance tomography system to observe the transient characteristics of gas-solid two-phase flow. The experimen- tal results indicated that solids throughput increased with increasing solids-gas ratio when the conveying pipeline was not plugged. Moreover, the optimum operating state was determined for the 1000 m long conveying pipeline with a throttle plate of 26 orifices. At this state the solids throughput was about 12.97 t/h. Additionally, the transportation pattern of fly ash gradually changed from sparse-dense flow to partial and plug flows with increasing conveying distance because of the conveying pressure loss, These experimental results provide important reference data for the development of pneumatic conveying technology.In this study, experiments on fly ash conveying were carried out with a home-made long-distance positive-pressure pneumatic conveying system equipped with a high performance electrical capacitance tomography system to observe the transient characteristics of gas-solid two-phase flow. The experimen- tal results indicated that solids throughput increased with increasing solids-gas ratio when the conveying pipeline was not plugged. Moreover, the optimum operating state was determined for the 1000 m long conveying pipeline with a throttle plate of 26 orifices. At this state the solids throughput was about 12.97 t/h. Additionally, the transportation pattern of fly ash gradually changed from sparse-dense flow to partial and plug flows with increasing conveying distance because of the conveying pressure loss, These experimental results provide important reference data for the development of pneumatic conveying technology.

关 键 词：Pneumatic conveying Electrical capacitance tomography Fly ash Gas-solid two-phase flow Solid concentration 

分 类 号：TQ536[化学工程—煤化学工程] TQ022