Method for continuous producing fuel oil from deposed lubricant

Abstract

A method for continuously producing fuel oil from waste lubricating oil is featured as carrying out treatment of stewing, setting, dewatering and impurity removing for raw material oil to separate out water and mechanical impurities, adding absorbent, catalytic cracking catalyst, molecular weight regulator, sending raw material oil with overheated steam into tube heater after heat exchanging and separating oil gas from heater outlet with fractionating column for obtaining different fue oil.

Description

technical field [0001] The invention relates to a method for continuously producing fuel oil by utilizing various waste lubricating oils under low pressure and high temperature conditions. Background technique [0002] The recycling of waste lubricating oil has always been aimed at recovering the lubricating oil components, and methods such as distillation, pickling, and clay refining are often used. For details of various methods, please refer to the book "Waste Lubricating Oil Regeneration". Because the purpose is to recycle lubricating oil, and most of them are small-scale production, the yield of oil products is low, the secondary pollution is serious, and the quality of oil products is poor, which seriously plagues the development of waste oil production. [0003] The original waste oil recovery production is mainly based on the refining of acid-base white clay, all of which are intermittent production, and the energy consumption in the production process is all one-tim...

AI Technical Summary

Problems solved by technology

And all kinds of additives, except some polymer compounds, the rest are metal and organic compounds, the recovery of lubricating oil must recover the additives, and the additives have the effect of suspending, dispersing and emulsifying various particles, thus causing In order to retain and recycle additives, it will inevitably form a complicated processing technology

If the additives are not retained, the additives will be decomposed, which will not only cause the decomposed additive components to exist in the lubricating oil, but these substances are not ideal components of the lubricating oil, which will directly affect the oil quality of the recycled lubricating oil.

At the same time, due to the decomposition of additives, the carbon deposits and other particles that were originally suspended in the oil are present in the oil in a free state. Once the temperature and flow rate are suitable, all the particles will immediately gather into coke and adhere to the equipment and In the pipeline, it is easy to cause coking, blockage, corrosion and local overheating of the equipment

[0006] CN1268557A proposes a method for regenerating vehicle light diesel oil with waste lubricating oil as raw material, for the purpose of obtaining vehicle light diesel oil and coke. kettle, this method is uneconomical, the operation process is complicated, and the cost is high; CN1040125C introduces a recovery method of waste lubricating oil, which is mainly used to treat the additive zinc dithiophosphate in lubricating oil, so that the waste lubricating oil can be heated at 224°C to 538°C Stay for 10 to 120 minutes, carry out thermal cracking, and generate oil through vacuum distillation. This method is mainly to demetallize waste lubricating oil; CN 1083875C discloses a device and method for regenerating fuel oil from waste oil, including a thermal cracking device, It is used to crack high-boiling hydrocarbon materials into lighter low-boiling substances in order to separate hydrocarbon vapor products from viscous substances. However, since waste lubricating oil contains a large amount of additives and carbon deposits, it can only be produced through the filtration process. Therefore, this method is not suitable for the regeneration of waste lubricating oil

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