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实验室模拟了实际生产中的天然气制冷系统,对乙二醇介质的黏度、表面张力、相组成、矿化度等作了分析检测,研究了发泡原因,对适合该制冷系统的消泡剂进行了筛选优化,并进行了复合型消泡剂的研制,制备了复合型有机硅乳液消泡剂YFB。通过室内实验得出了消泡剂各组分的合适配比:二甲基硅油20.0%、二氧化硅2.5%、复合乳化剂(Span-60、Tween-60)3.0%、液体石蜡3.0%、分散剂20%,去离子水余量。该消泡剂在温度为-5℃时的消泡速率达到了28.4mm/s,在-25℃时的消泡速率也在20mm/s以上。实验还表明,YFB复合消泡剂在弱碱性溶液中的消泡速率更高,达到30.0mm/s。
Laboratory simulation of the actual production of natural gas refrigeration system, ethylene glycol medium viscosity, surface tension, phase composition, degree of salinity were analyzed and tested, the reasons for the foam, the defoamers suitable for the refrigeration system Screening optimization, and the development of composite defoamers, preparation of a composite silicone emulsion defoamer YFB. Through the laboratory experiments, the suitable ratio of each component of antifoaming agent was obtained: 20.0% of dimethicone, 2.5% of silica, 3.0% of compound emulsifier (Span-60, Tween-60) Dispersant 20%, deionized water balance. The antifoaming agent at a temperature of -5 ℃ defoaming rate reached 28.4mm / s, at -25 ℃ at a defoaming rate of 20mm / s or more. Experiments also show that, YFB composite defoamers defoaming rate higher in weak alkaline solution, reaching 30.0mm / s.