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Waste lubricating oil circulating heat storage distillation device and method

A technology of waste lubricating oil and distillation method, which is applied in vacuum distillation, lubricating composition, flash evaporation, etc., which can solve the problems of easy high-temperature cracking of base oil, low yield of base oil, and small processing volume, etc., and solve the problem of incomplete evaporation , to promote full evaporation, large processing effect

Pending Publication Date: 2022-03-25
安徽国孚生态工程技术有限公司
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Problems solved by technology

[0005] The object of the present invention is to provide a waste lubricating oil circulation heat storage distillation device and method, which solves the existing waste lubricating oil distillation process of easy high-temperature cracking of base oil, low yield of base oil, small processing amount, easy coking, etc. question

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  • Waste lubricating oil circulating heat storage distillation device and method

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[0027] The application will be described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific embodiments are only used to further illustrate the application, and cannot be interpreted as limiting the protection scope of the application. The above application content makes some non-essential improvements and adjustments to this application.

[0028] A waste lubricating oil circulation heat storage distillation method, the waste lubricating oil refers to the waste lubricating oil after atmospheric pressure flash evaporation, vacuum distillation to remove water, paraffin oil, and gas oil. At this time, the temperature of the waste lubricating oil is 200-250°C, the specific steps of distillation include:

[0029] Step 1: Heat the waste lubricating oil with the preheated molten salt. The preheating is to use a tubular heating furnace for preheating, and the temperature after preheating is 390-410°C, prefera...

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Abstract

The invention discloses a waste lubricating oil circulating heat storage distillation device and method, and the method comprises the following steps: heating waste lubricating oil through high-temperature fused salt, so that the waste lubricating oil becomes a gas-liquid mixture; the gas-liquid mixture is guided into a distillation tower in the tangential direction, the gas-liquid mixture rotates along the tower wall, gas-liquid separation is achieved, and meanwhile the balance flash evaporation process is carried out; partial residual oil in the residual oil at the bottom of the tower is subjected to circulating heat storage again by utilizing the preheated fused salt, and the residual oil subjected to heat storage is introduced into the distillation tower to release heat, so that light components in unevaporated liquid are fully heated and evaporated. The molten salt heat exchanger is used for replacing a traditional tubular heating furnace, waste lubricating oil is indirectly heated through molten salt, the phenomenon that a large amount of base oil in the waste lubricating oil is cracked at high temperature is avoided, and loss of the base oil is reduced; in addition, the circulating heat storage and heat supply process of the residual oil is utilized, sufficient evaporation of the light-component base oil is promoted, and the problems that evaporation of the base oil is not thorough, and the yield is low are effectively solved.

Description

technical field [0001] The invention relates to the technical field of waste lubricating oil distillation, in particular to a waste lubricating oil circulating heat storage distillation device and method. Background technique [0002] Lubricating oil is composed of base oil and a certain amount of additives. After a period of use, lubricating oil will lose its normal function due to the introduction of impurities and deterioration of additives, and become waste lubricating oil. Waste lubricating oil contains saturated oil (light component base oil, as the reason component) and unsaturated oil, and also contains impurities such as sludge, metal particles, carbon black, water, additives and degradation products. [0003] With the development of technology and the improvement of environmental protection requirements, waste lubricating oil can be processed to obtain regenerated base oil. The main process is distillation, which is generally divided into atmospheric flash distilla...

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Application Information

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IPC IPC(8): B01D3/06B01D3/10C10M175/00
CPCB01D3/06B01D3/10C10M175/0025
Inventor 李书龙汪绪武
Owner 安徽国孚生态工程技术有限公司
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