常压闪蒸-溶剂脱沥青组合工艺提高塔河原油加工中液体收率的研究

IMPROVING LIQUID YIELD OF TAHE CRUDE BY ATOMSPHERIC FLASH-SOLVENT DEASPHALTING COMBINED PROCESS

基于塔河原油高硫、高酸、高残炭、高沥青质、高金属以及低轻馏分油收率等特点,对塔河原油常压闪蒸-溶剂脱沥青与常压蒸馏-延迟焦化两种组合工艺进行了对比分析。结果表明:常压闪蒸-溶剂脱沥青组合工艺的总液体收率为78.77%,比常压蒸馏-延迟焦化组合工艺的总液体收率(69.30%)提高9.47百分点,可为催化裂化或加氢处理提供较高比例的优质原料。闪蒸-溶剂脱沥青组合工艺操作温度较低,可减缓常减压蒸馏等装置的石油酸腐蚀问题。从提高塔河原油液体收率、改善油品性质和缓解腐蚀等方面考虑,常压闪蒸-溶剂脱沥青组合工艺具有一定的发展前景。

Tahe crude is characterized by its high content in sulfur,acid value,Conradson carbon residue,asphaltenes,metals and low yield of light distillates.Two combined processes for Tahe crude oil,atmospheric flashing-solvent deasphalting process and atmospheric distillation-delayed coking process were compared to see which one is better for more liquid yield.The results show that the total liquid yield can reach 78.77% by the atmospheric flashing-solvent deasphalting combined process,9.47 percentage points more than the atmospheric distillation-delayed coking process（69.30%）.The liquid distillations with high quality from the former process can be used as catalytic cracking or hydrotreating feeds.Meanwhile,the corrosion of petroleum acid existing in atmospheric and vacuum distillation can be retarded as the operating temperature of atmospheric flashing-solvent deasphalting combined process is far lower than the temperature where the corrosion of petroleum acid is seriously occurred.In aspect in increasing total liquid yield,improving liquid oil properties and retarding corrosion,the atmospheric flashing-solvent deasphalting combined process is superior to the compared process.