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| 在装置中安装两根垂直管束代替透氢钯膜组件，考察了压降流速曲线、压力脉动、床层轴向密度分布、床层膨胀率，并与自由床中的气固流动规律进行了对比。结果表明，装置中加入了垂直内构件以后降低了床层的压力脉动；轴向密度较自由床均匀，说明内构件具有对破碎气泡，抑制气泡长大的能力；与自由床相比，内构件流化床具有较小的起始湍动速度和较大的床层膨胀率；结合大量实验数据，本文修正了气泡尺寸计算公式，建立新的适用于该新型膜流化床反应器气泡直径模型；实验结果表明，该模型计算结果可以较准确地描述该反应器湍动状态下密相床层颗粒气泡尺寸，能够为工业流化床反应器优化设计提供基础数据。 |
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2楼2010-04-29 23:48:27
syh9288
捐助贵宾 (著名写手)
海军上将
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wg423(金币+50, 翻译EPI+1): 代发 2011-04-14 13:08:39
wg423(金币+50, 翻译EPI+1): 代发 2011-04-14 13:08:39
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Two vertical bundles is installed into the equipment to replace the hydrogen penetrating palladium membrane module.the pressure drop flow rate curve,the pressure pulsation,the bed axial density distribution and bed inflation rate is investigated ,compared with them in the gas-solid flowing law in free bed. Results show that the bed's pressure pulsation is reduced after the vertically inner component being joined into device;Axial density in the bed is more even than that in the free bed, explaining for the breaking and suppressing ability that the inner component have on the bubble;Compared with the free bed ,fluidized bed with inner component have a smaller starting turbulent-speed and larger bed inflation rate;Combined with a lot of experimental data,the calculation formula for bubble size is fixd and the bubble diameter model applicable to the new type membrane fluidized bed reactor is established;Experimental results show that the model's caculated result can accurately describe the bubble size in dense-phase bed under the tuburlent state,which can provide the basic datas for the optimal design of the industrial fluidized bed reactor. |
3楼2010-04-29 23:49:16
syh9288
捐助贵宾 (著名写手)
海军上将
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| Two vertical bundles is installed into the equipment to replace the hydrogen penetrating palladium membrane module.the pressure drop flow rate curve,the pressure pulsation,the bed axial density distribution and bed inflation rate is investigated ,compared with them in the gas-solid flowing law in free bed. Results show that the bed's pressure pulsation is reduced after the vertically inner component being joined into device;Axial density in the bed is more even than that in the free bed, explaining for the breaking and suppressing ability that the inner component have on the bubble;Compared with the free bed ,fluidized bed with inner component have a smaller starting turbulent-speed and larger bed inflation rate;Combined with a lot of experimental data,the calculation formula for bubble size is fixd and the bubble diameter model applicable to the new type membrane fluidized bed reactor is established;Experimental results show that the model's caculated result can accurately describe the bubble size in dense-phase bed under the tuburlent state,which can provide the basic datas for the optimal design of the industrial fluidized bed reactor. |
4楼2010-04-29 23:50:00
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