A method for refining and chemical enterprises to dispose of waste lubricating oil

A kind of waste lubricating oil, refining technology

Active Publication Date: 2022-06-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is suitable for enterprises close to the smelting of titanium magnetite, not suitable for the existing conditions of large refining and chemical enterprises
[0009] There are other similar related methods and equipments that focus on establishing a set of equipment to realize the recovery and regeneration of waste lubricating oil, and do not make full use of the existing conditions of refining and chemical enterprises to dispose of them.

Method used

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  • A method for refining and chemical enterprises to dispose of waste lubricating oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The waste lubricating oil is mixed with 5.0wt.% clay, the operating temperature is 60°C, and the stirring time is 20min. After the reaction, the additives and impurities in the waste lubricating oil react with the clay to adsorb and remove;

[0060] The solid phase and the liquid phase are obtained by standing and settling through secondary filtration (50 meshes for the first stage and 150 meshes for the second stage). The solid phase is classified as hazardous waste for disposal;

[0061] The liquid phase enters the negative pressure flash device, the operating temperature is 50°C, and the operating pressure is 70KPa absolute.

[0062] The obtained fraction is separated from oil and water to obtain oily sewage and oil phase. The oily sewage is merged into the oily sewage line in the plant area for treatment, and the obtained oil phase and the heavy components remaining in the flash are sent to the raw material supply line of the catalytic cracking unit, and then opera...

Embodiment 2

[0064] The waste lubricating oil is mixed with 8.0wt.% clay, the operating temperature is 70°C, and the stirring time is 30 minutes. After the reaction, the additives and impurities in the waste lubricating oil react with the clay to adsorb and remove;

[0065] The solid phase and the liquid phase are obtained by standing and settling through secondary filtration (80 meshes for the first stage and 150 meshes for the second stage). The solid phase is classified as hazardous waste for disposal;

[0066] The liquid phase enters the negative pressure flash device, the operating temperature is 60°C, and the operating pressure is 65KPa absolute.

[0067] The obtained fraction is separated from oil and water to obtain oily sewage and oil phase. The oily sewage is merged into the oily sewage line in the plant area for treatment, and the obtained oil phase and the heavy components remaining in the flash are sent to the raw material supply line of the catalytic cracking unit, and then ...

Embodiment 3

[0069] The waste lubricating oil is mixed with 10.0wt.% clay, the operating temperature is 80°C, and the stirring time is 40min. After the reaction, the additives and impurities in the waste lubricating oil react with the clay to adsorb and remove;

[0070] The solid phase and the liquid phase are obtained by standing and settling through secondary filtration (80 meshes for the first stage and 200 meshes for the second stage). The solid phase is classified as hazardous waste for disposal;

[0071] The liquid phase enters the negative pressure flashing device, the operating temperature is 70°C, and the operating pressure is 50KPa absolute;

[0072] The obtained fraction is separated from oil and water to obtain oily sewage and oil phase. The oily sewage is merged into the oily sewage line in the plant area for treatment, and the obtained oil phase and the heavy components remaining in the flash are sent to the raw material supply line of the catalytic cracking unit, and then o...

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Abstract

The invention discloses a method for disposing of waste lubricating oil in refining and chemical enterprises, and belongs to the technical field of petrochemical production. It solves the technical problems that the waste lubricating oil treatment method in the prior art is not suitable for refining and chemical enterprises and the recovery efficiency is low. The method comprises the following steps: firstly, adding an adsorbent to the waste lubricating oil for mixing and stirring, allowing the waste lubricating oil to settle after being adsorbed, and removing additives in the waste lubricating oil; then, filtering the obtained waste lubricating oil after standing still to obtain solid phase and liquid phase; then, the liquid phase is filtered and subjected to negative pressure flash evaporation to remove water and some light components, and the remaining heavy components are separated from oil and water to obtain oily sewage and oil phase; finally, the The heavy component and the oil phase are sent to the refinery unit for re-refining. The present invention can make full use of the existing advantages of refining and chemical enterprises, dispose of the waste lubricating oil produced by itself to produce qualified refining and chemical products, realize "hazardous waste reduction", reduce environmental protection costs, and increase economic benefits.

Description

technical field [0001] The invention belongs to the technical field of petrochemical production, and in particular relates to a method for disposing of waste lubricating oil in a refining and chemical enterprise. Background technique [0002] Every year in the production process of refining and chemical enterprises, the operation of dynamic equipment (such as pumps, compressors, steam turbines, fans, etc.) will generate a large amount of waste lubricating oil, and the properties of waste lubricating oil produced by various refining and chemical enterprises are basically the same, but due to the processing scale And the structure of the device is different, resulting in different production of waste oil. As hazardous waste, waste lubricating oil needs to be handed over to a third-party qualified enterprise for hazardous waste disposal for disposal. Waste lubricating oil itself contains some impurities and deteriorates, but compared with crude oil, it can still be used as a g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
CPCC10M175/0008C10M175/0025C10M175/005C10M175/0083
Inventor 张海宋项宁李超张宏哲
Owner CHINA PETROLEUM & CHEM CORP
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