A continuous process for gas hydrate production is of great significance to hydrate–based technologies. In this study, filtrating hydrate particles from hydrate slurries, which is a key step for continuous hydrate production based on water–in–oil emulsion, was systematically studied. The specific resistances of the hydrate cakes formed from different emulsions and under different pressure drops were measured. The results showed that the specific resistance of the hydrate cake increased with the increase of the pressure drop in two stages, and it increased much more rapidly in the second stage. Increasing the concentrations of Span 20, TBAB and PE would increase the specific resistance. The resistances of the hydrate cakes formed with Span 20 + TBAB were much higher than that with Span 20 or Span 20 + PE. Calculation results suggested that only when TBAB with concentration ≥0.25 wt% was used as the anti–agglomerant, the filtration rate could not meet the requirement of a hypothetical production task. An approach that involves filtration mediums, additives and pressure drops was proposed to efficiently filtrate hydrate slurries for continuous hydrate production. Based on the results, a process for continuous hydrate production from water–in–oil emulsion was proposed.

天然气水合物的连续生产过程对水合物技术具有重要意义。本研究系统研究了从水合物浆液中过滤水合物颗粒，这是基于油包水乳液连续生产水合物的关键步骤。测量了由不同乳液和不同压降形成的水合物饼的电阻率。结果表明，水合物饼的比电阻在两个阶段随着压降的增加而增加，而在第二阶段增加得更快。增加 Span 20、TBAB 和 PE 的浓度会增加电阻率。Span 20 + TBAB 形成的水合物饼的阻力远高于 Span 20 或 Span 20 + PE。计算结果表明，仅当使用浓度≥0.25 wt%的TBAB作为抗结块剂时，过滤速率不能满足假设生产任务的要求。提出了一种涉及过滤介质、添加剂和压降的方法，以有效过滤水合物浆液以实现连续水合物生产。基于这些结果，提出了一种从油包水乳液中连续生产水合物的工艺。