Recovery system for reclaimed lubricating distillate oil and recovery processing method

Abstract

The invention relates to a recovery system for reclaimed lubricating distillate oil. The recovery system comprises a primarily processing system, an atmospheric distillation system and a reduced pressure distillation system, wherein the primarily processing system comprises a stirring kettle and filter pressing equipment; the atmospheric distillation system comprises an atmospheric distillation still, an atmospheric condenser and a low-boiling point distillate oil temporary storage tank; the reduced pressure distillation system comprises a reduced pressure distillation still, a molten salt furnace pipe, a reduced pressure condenser, a vacuum pump, a liquid seal device and a distillate oil temporary storage tank; the reduced pressure distillation still is communicated with the atmospheric distillation still through a pipeline; the molten salt furnace pipe is arranged in the reduced pressure distillation still; the reduced pressure condenser is arranged above the reduced pressure distillation still; the vacuum pump is connected with the reduced pressure condenser; the liquid seal device is arranged below the reduced pressure condenser; and the distillate oil temporary storage tank is arranged below the liquid seal device. The invention also relates to a recovery processing method for the reclaimed lubricating distillate oil. Due to the adoption of the recovery system and the recovery processing method, the reclaimed lubricating distillate oil has good color, high purity, high recovery utilization ratio and safe and convenient operation and can replace basic lubricating oil.

Description

technical field [0001] The invention relates to the recovery of waste lubricating oil, in particular to a recovery system and recovery treatment method for regenerated lubricating distillate oil. Background technique [0002] The traditional tower refining process or coking cracking process recycles waste lubricating oil. The raw material oil is directly heated to about 450°C with an open flame in a heating furnace, and refined under cracking conditions (the cracking temperature is 426°C). Because the temperature is too high, the raw material The oil is easily cracked to produce unsaturated hydrocarbons such as olefins, which are easily oxidized, resulting in poor oxidation resistance, dark color, and inseparable fractions. It can only be used as non-standard fuel oil and cannot replace lubricating base oil. The added value is very high. Low. Moreover, the traditional recovery system uses atmospheric distillation and open flame heating, and the heating rate is too fast to r...

AI Technical Summary

Problems solved by technology

[0002] The traditional tower refining process or coking cracking process recycles waste lubricating oil. The raw material oil is directly heated to about 450°C with an open flame in a heating furnace, and refined under cracking conditions (the cracking temperature is 426°C). Because the temperature is too high, the raw material The oil is easily cracked to produce unsaturated hydrocarbons such as olefins, which are easily oxidized, resulting in poor oxidation resistance, dark color, and inseparable fractions. It can only be used as non-standard fuel oil and cannot replace lubricating base oil. The added value is very high. Low

Moreover, the traditional recovery system uses atmospheric distillation and open flame heating, and the heating rate is too fast to recover the low-boiling components contained in the waste lubricating oil, such as light chemical oil. The main component of light chemical washing oil is butane, with a boiling point of 30 ℃, if the temperature is too high, the light chemical washing oil is difficult to condense, easy to gasify, difficult to recycle, so it is usually burned, causing environmental pollution and energy waste

The traditional oil refining process can only increase the yield under the condition of high temperature cracking, but the product quality is poor, and a large amount of residue will be generated after cracking, which will cause a lot of loss and cause secondary pollution

Moreover, simple atmospheric distillation cannot completely remove a certain amount of chemical additives, metal dust and other undesirable substances contained in waste lubricating oil. During coking and cracking, these substances are very easy to produce harmful chemical reactions with lubricating oil, resulting in damage to the oil. Undesirable substances that have a greater impact on product quality

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