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The process flow and the main devices of a new two-stage dry-fed coal gasification pilot plant with a throughout of 36 t/d are introduced in this paper. For comparison with the traditional one-stage gasifiers, the influences of the coal feed ratio between two stages on the performance of the gasifier are detailedly studied by a series of experiments. The results reveal that the two-stage gasification decreases the temperature of the syngas at the outlet of the gasifier, simplifies the gasification process, and reduces the size of the syngas cooler. Moreover, the cold gas efficiency of the gasifier can be improved by using the two-stage gasification. In our experiments, the efficiency is about 3 %- 6 % higher than the existing one-stage gasifiers. 相似文献
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在GIS动态分段基本原理的基础上,将铁路车站的里程作为路径系统测量M值的校准参考依据,部分铁路货运量(用装车数表征货运量的大小)作为线事件引入到铁路网的货流径路系统中,实现了铁路货运量的可视化表达,并根据发站和到站自动沿线绘制货运方向箭头,为铁路货运运输分析和研究决策提供技术支持. 相似文献
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<正>提单是国际贸易中使用最多,也是最重要的物权凭证,自16世纪诞生以来一直活跃于国际贸易框架内。20世纪80年代起,伴随着集装箱运输以及信息技术的迅猛发展,纸质提单开始面临挑战,电子提单应运而生,到了90年代后期,具有代表性的BOLERO(Bill of Landing for Electronic Registry Organization)电子提单开始发行。电子提单的流通是通过电子数据的交换实现的,但受限于其中心化的技术架构和安全性方面存在的缺陷,当时电子提单并未得到广泛的推广。 相似文献
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