国产聚醚型消泡剂在天然气净化装置的应用及效果评价

Application and effect evaluation of domestic polyether defoamer in natural gas purification unit

关键词:  天然气净化  醇胺法  聚醚型消泡剂  发泡  拦液  抑泡

Key words:  natural gas purification  alcoholamine method  polyether defoamer  foaming  liquid interception  foaming inhibition

摘要:

目的 研究国产消泡剂在天然气净化装置的适用性，解决靖边气田天然气净化装置使用进口聚醚改性有机硅型消泡剂KS-604导致生产运行成本较高的问题。方法 从18种国产消泡剂中优选出聚醚型消泡剂A-604，通过对国产聚醚型消泡剂A-604与装置目前使用的进口有机硅型消泡剂KS-604进行室内实验和现场应用试验评价，研究消泡剂A-604在现场装置的使用效果。结果 国产消泡剂A-604和进口消泡剂KS-604的性能相当，消泡剂A-604在现场装置中留存时间更长，抑泡能力较强，但其在加量较低时的消泡效果比KS-604略差。将现场装置A-604消泡剂的加注方案调整为2 L/次后，拦液频次平均为每4天1次，最低为每7天1次。结论 如果将进口消泡剂KS-604更换为国产消泡剂A-604，在消泡效果接近的前提下，单套天然气净化装置每月可节省费用约1.1万元，全厂每年可节省约132万元。消泡剂A-604可作为进口消泡剂KS-604的替代产品，能大大降低生产运行成本。

Abstract:

Objective The aim is to study the applicability of domestic defoamer and to address the problem of high production and operation cost caused by the use of imported polyether-modified silicone defoamer KS-604 in the natural gas purification unit of Jingbian gas field. Method Polyether defoamer A-604 was selected from 18 kinds of domestic defoamers. The application effect of defoamer A-604 in the field unit was studied by an indoor experiment and field application test evaluation of domestic polyether defoamer A-604 and imported silicone defoamer KS-604 currently used in the unit. Result The performance of domestic defoamer A-604 was comparable to that of imported defoamer KS-604. The defoamer A-604 exhibited a prolonged retention time in the field unit and demonstrated robust foaming inhibition capabilities. However, its defoaming effect was marginally inferior to that of KS-604 when the dosage was low. After adjusting the filling scheme for the domestic defoamer A-604 in the field unit to 2 liters each time, the average frequency of liquid interception occurred once every 4 days, with the lowest being once every 7 days. Conclusion If the imported defoamer KS-604 currently used in the unit is replaced by the domestic defoamer A-604, under the premise of similar defoaming effect, a single set of units can save about 11 000 yuan per month, and the whole plant can save about 1.32 million yuan per year. The defoamer A-604 can be used as an alternative product of imported defoamer KS-604, which can greatly reduce the production and operation cost.