Abstract:

Hydrate regasification experimental study were performed for gas storage as hydrate，and the effect of temperature，dissociation pressure and hydrate quantity on hydrate dissociation rate were studied. The results indicated that hydrate dissociation rate decreased because of a buffering effect when the hydrate quantity was large in the reactor，but dissociation rate could increase by lowering dissociation pressure，and hydrate dissociation rate was controlled by the driving force of dissociation，which depended on heat transfer rate and dissociation pressure. According to the mechanism analysis of hydrate regasification，a model of regasification of methane hydrate was proposed based on heat transfer and equation of hydrate dissociation rate. The gas production rate of hydrate regasification was calculated by using the model and the results were basically in agreement with the experimental results. Analysis of disagreement between the experimental and calculated results was made.

摘要：

针对水合物法储运气体技术，实验研究了水合物再汽化分解过程，考察了加热温度、初始分解压力和反应器中水合物量等因素对水合物再汽化分解速率的影响。实验结果表明，当反应器中水合物量较多时存在分解速率缓冲现象，减慢了水合物的分解速率，而排气降压可以有效地提高水合物的分解速率。根据实验现象分析了水合物再汽化分解机理，认为水合物的分解速率主要取决于分解推动力的大小，而分解推动力又受传热速率和分解压力等条件的影响。结合传热和水合物分解速率方程，建立了水合物的再汽化分解模型，计算了不同热水温度、不同流量和不同压力等条件下水合物再汽化分解的产气速率，并与实验结果进行了对比，两者总体吻合较好，对存在的误差进行了原因分析。