天然气水合物生成技术评价方法

The Evaluation Method for the Natural Gas Hydrate Formation Technology

水合物可以在接近常温、常压条件下储存天然气,储气密度与CNG相似,是一种经济、安全、有效的气体储运技术,而如何快速、高效地生产具有高储气密度的水合物则成为水合物储运技术得到实际应用的前提。近年来,国内外研究人员已经开发出了多样化的水合物生成技术,但还缺乏一种综合性的评价手段,现有的评价手段多是针对储气密度或者生成速度等单一因素的比较,不能综合反映各种生成技术之间的优缺点。针对这一问题,利用层次分析的思路,通过对水合物生成过程影响因素的分析,建立了一种系统化的评价方法,基于该方法,对国内外43种代表性的水合物生成方法进行了分析,优选出了具有较好综合性能的生成方法。同时,对几种典型的强化手段和添加剂进行了分析,发现采用喷雾法和引入多孔介质能显著提高水合物生成技术的得分。

Because hydrate can store natural gas under the condition dose to normal pressure and temperature, and the energy density is similar to CNG, it is considered as a safe and economical method of gas storage and transportation. And how to produce hydrate fast and efficiently with high gas capacity is the promise of that this method is widely used. In de- cades, dozens of- hydrate formation methods were studied. However, there remains a need for an evaluation method to evaluate those formation methods comprehensively. The existing evaluation method mostly focused on single factor such as gas storage capacity or hydrate for- mation rate, and the comprehensive properties of＇each formation method could not be mea- sured. To solve this problem , a systematic evaluate method that was based on analytic hierar- chy process had been built. The factors that influenced the hydrate formation were taken into consideration in this evaluate method. After that, 43 kinds of- hydrate formation methods were evaluated, and some formation methods that were balanced among the gas storage ca- pacity, the formation rate and the lower cost were chosen. Besides, the effects of- several typical enhanced means and additives were also evaluated, the spray method and the porous media additive could improve the comprehensive performance score observably.