糠醛精制变压器油工艺优化研究

为了解决糠醛精制变压器油工艺中存在脱酸选择性低、产品收率低、萃取剂成本和再生能耗高等问题,对糠醛精制工艺进行了优化研究。研究表明:与原有糠醛精制工艺相比较,优化工艺采用研制的糠醛复合剂,脱酸选择性提高246.6%,精制油收率提高20.1%以上,萃取剂用量下降40%,萃取剂吨成本下降约30%,再生能耗也将大幅度下降。在最优操作条件下,可使原料油酸值从1.53 mgKOH/g降到0.012 mgKOH/g,满足GB 2536-90的要求,残炭从0.23%降至0.063%,精制油收率达84.1%。优化工艺仍采用现有的糠醛精制工艺,通过采用新的萃取剂,调整操作条件和进行必要的技术改造即可进行,具有良好的技术经济效益和开发应用前景。

STUDY ON OPTIMIZATION OF FURFURAL EXTRACTION TECHNOLOGY FOR TRANSFORMER OIL

In order to solve some problems in the process of furfural extraction for transformer oil,such as the low selectivity of acid removal,the low yield of products,the high cost of extractant and the high energy consumption for regeneration of the used extractant,the process optimization was carried out.Compared with the original process,in the optimized process with furfural composite solvent,the selectivity of acid removal was increased by 246.6%,the yield of the treated transformer oil was increased by more than 20.1%,the dosage of extractant was decreased by 40%,the cost of extractant per ton was decreased by about 30% and the energy consumption for regeneration would be greatly reduced.Under optimum operation conditions,the acid number of raw material can be reduced from 1.53 mgKOH/g to 0.012 mgKOH/g,and meets the requirements of GB 2536-90 specification,the carbon residue number can also be reduced from 0.23 % to 0.063%,and the yield of the treated transformer oil can reach 84.1%.The optimized process can be applied in the existed furfural extraction process through using new extractant,adjusting operation conditions and making some essential optimizing technology,with good techno-economic benefits and outlook of development.