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滚筒干燥机内煤粉尘颗粒传热传质数值模拟 被引量:1
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作者 邢曦文 浑宝炬 宋哲君 《中国矿业》 2021年第S02期310-315,共6页
为了研究干燥介质流量和温度对滚筒干燥机内煤泥干燥的效果,提高工业生产效率并保障系统的安全性,利用流体仿真Fluent软件对滚筒干燥机内煤泥热烟气干燥过程进行了数值模拟。采用Rosin-Rammler模型对颗粒粒度分布进行定义。通过改变烟... 为了研究干燥介质流量和温度对滚筒干燥机内煤泥干燥的效果,提高工业生产效率并保障系统的安全性,利用流体仿真Fluent软件对滚筒干燥机内煤泥热烟气干燥过程进行了数值模拟。采用Rosin-Rammler模型对颗粒粒度分布进行定义。通过改变烟气的物理参数,分析系统内煤泥颗粒干燥情况与干燥介质流量、温度之间的关系。结果表明,煤泥干燥效率随着入口烟气温度的增高而提高,但较高的烟气温度也会造成更多的热损耗,较高的烟气速率一定程度上可以提高,但也会带走热量。工业生产在安全范围内,达到生产需求的情况下,烟气温度和速率都不宜过高。 展开更多
关键词 煤泥干燥 资源化提质 粒径分布 传热传 数值模拟
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Fenlong Cultivation-the Fourth Set of Farming Methods Invented in China 被引量:16
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作者 韦本辉 《Agricultural Science & Technology》 CAS 2017年第11期2045-2048,2052,共5页
The basic theory and effect of the new farming method of "Fenlong" cultivation which has been included in the main extension technology of Ministry of Agriculture of the People's Republic of China is fully illustra... The basic theory and effect of the new farming method of "Fenlong" cultivation which has been included in the main extension technology of Ministry of Agriculture of the People's Republic of China is fully illustrated for the first time, and it is the fourth set (generation) of farming modes and methods following manpower, animal and mechanical (tractor) farming. It follows the natural law to achieve soil activation, water saving, oxygen increase, warming and desalination through the active use of natural resources like soil, rainfall and solar energy, thereby promoting a new round of natural agricultural production and quality improvement and water con- servation, which has crop yield increase by 10%-30%, quality improvement of 5%, natural precipitation retaining increase by100%. The characteristics and mechanism are the use of spiral drill for one-time completion of the land preparation by drilling vertically to 30-50 cm of soil layer through high speed peeling. After instant high temperature and many fierce impacts, mechanical frictions, it could achieve the multiplication of the number of loose soil, soil physical modification and expansion of the soil nutrients, reservoirs, oxygen, microorganisms ("Four pools"). Fenlong cultivation can give birth to new farming culture and civilization, and it can achieve the physical "desalinized" transformation and utilization of saline soil. The formation of Fenlong green farming technology system makes it possible to invent the farming tools of "serf-propelled Fenlong machinery" that has got the patent, and it is the method for farmland (dry land, paddy field) Fenlong cultivation, saline-alkali soil smash-ridging cultivation and for the abundance of grass ecology on degraded grassland. The application of Fenlong "4+1" (arable, saline-alkali soil, grasslands, Sponge City+rivers) green development in China can achieve the "double safety" of food and living space. 展开更多
关键词 Fenlong cultivation The fourth set (generation) of new farming methods Activation and utilization of natural resources Improvement of production and quality Water conservation ecology
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