The invention discloses a method for pretreating waste
mineral oil and performing hydrogenation regeneration to produce lubricating
base oil. The method is characterized in that: pretreatment of the waste
mineral oil sequentially comprises the following steps of performing
sedimentation dehydration, washing, centrifuging by using a disc-type
centrifuge, centrifuging by using a horizontal
centrifuge, evaporating by using a scraping film
evaporator, and performing reduced pressure
distillation; preheated lubricating
base oil enters a hydrogenating device, enters a pre-hydrogenation protection reactor first and then enters the hydrorefining reactor to produce the high-grade lubricating
base oil. By the method for pretreating the waste
mineral oil and performing hydrogenation regeneration to produce the lubricating base oil, various non-ideal components in the waste lubricating
oil can be effectively removed only after pretreatment provided by the invention; the method is simple in steps and is convenient to operate; manpower and
material resources are saved; the lubricating base oil product is good in quality and high in yield, wastes are not produced, and no
pollution is caused to the environment; operating conditions are relatively mild, using requirements on equipment are lowered, the regenerating efficiency is increased by 10-15%,
continuous operation of the equipment is facilitated, and
pollution of the
waste oil on the environment and shortage of a
petroleum product are relieved.