高酸值原油脱酸剂技术的实验研究

LAB RESEARCH ON THE TECHNOLOGY FOR DEACIDIFICATION SOLVENT OF THE CRUDE OIL WITH HIGH ACID NUMBER

针对馏分油脱酸技术不能解决高酸值原油蒸馏过程的设备腐蚀问题,采用脱酸剂技术对高酸值原油脱酸进行实验研究。与馏分油碱洗脱酸工艺相比较,该技术可以缓解或消除石油酸对炼油设备的腐蚀;具有剂油比小、烧碱用量少、不乳化和污水排放量小等特点;有较好的脱酸效果和适应性,脱酸率达到95%;酸值为2.07mgKOH/g的高酸值原油脱酸后,进行蒸馏切割,所得180~350℃馏分油的酸度〈10mgKOH/100ml,直馏柴油不必再进行脱酸精制。提出采用原油电脱盐工艺和脱酸技术相结合的新工艺,可利用现有的工艺设备,技改费用少,易开发应用。

Because of the method of deacidification of the oil fraction can't solve the problem of the equipment corrosion effectively, the technology of deacidification solvent is used to research the deacidification of the crude oil with high acid number in lab. Comparing with the technique of deacidification of alkali washing for the oil fraction, the technology of deacidification solven of the crude oil with high acid numbe can decrease or banish the naphthenic acid corrossion to equipment, it is of the characteristic of small dosage,low wastage of NaOH,small discharge capacity no emulsification, good adaptability and effect of deacidification ,the rate of deacidification reaches 95%. After the crude oil with acid number of 2.07mgKOH/g is deacidized,the acid number of it's distillation of 180～350℃ is smaller than 10 mgKOH/100ml, so the distillated diesel oil does not need deacidification. The new technique that combinates the desalting with deacidificating is put forward, it is pointed out that the existing equipment can be used to save cost.