Spent lubrication oil regeneration device with ultrasonic membrane separator

Abstract

The invention relates to a spent lubrication oil regeneration device, which comprises a first heater, a precipitator, a second heater, a solid-liquid separator, an electric dehydrator, the ultrasonic membrane separator, a third heater, a catalytic cracking reactor and a fractionating tower, which are connected in sequence. An ultrasonic part is disposed at the front of a filter membrane inside the ultrasonic membrane separator, the filter membrane in the ultrasonic membrane separator is a hollow fiber membrane resistant to 80-100 DEG C and resistant to oil corrosion, and average pore size of the filter membrane is 0.1-0.5 micrometers. Spent lubrication oil is separated by the ultrasonic membrane separator to obtain light oil and heavy oil, the light oil is discharged from an oil outlet and collected for use, the heavy oil is discharged from a concentrated oil outlet into the catalytic cracking reactor to generate light oil, base lubrication oil and non-hydrocarbon gases after reaction, and the light oil, the base lubrication oil and the non-hydrocarbon gases are separated and used respectively. The spent lubrication oil regeneration device is applicable to the field of recycle of spent lubrication oil.

Description

technical field [0001] The invention relates to a waste oil regeneration treatment device, in particular to a waste lubricating oil regeneration treatment device equipped with an ultrasonic membrane separator, belonging to the technical field of chemical industry. Background technique [0002] Lubricating oil is a kind of liquid lubricant, used in various types of machinery, mainly to reduce friction, cooling, rust prevention, cleaning, sealing and buffering, so lubricating oil is widely used in transportation, manufacturing, rubber, Chemical and other industries. With the economic growth, the demand and consumption of lubricating oil are also increasing. However, the lubricating oil is inevitably subjected to mechanical and high temperature effects during use, and the continuous carbon chain of its polymer is easily broken under the above conditions, resulting in the failure of the lubricating oil; and the pollution of waste water, metals and other impurities in the use en...

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Problems solved by technology

[0006] It needs to be further explained that although the impurities in the waste oil have been removed by physical or mechanical methods before using the membrane filtration device to separate the waste oil, there is still a certain amount of impurities in it, and this impurity is being processed Membrane separation will affect the filter membrane. The impurities in the waste oil whose size is similar to the pore size of the filter membrane tend to block the pores of the filter membrane, and the impurities in the waste oil whose size is larger than the pore size of the filter membrane will be affected by the pressure difference on both sides of the filter membrane. It is adsorbed on the surface of the filter membrane and covers the pores of the filter membrane, thereby reducing the permeation flux of the filter membrane and reducing the separation efficiency of the filter membrane. Key points in the process of treating waste oil with filtration devices

[0007] In the above technology, when the vibrating membrane filter device is used to filter the waste lubricating oil, the shear wave generated by the high-frequency vibration on the surface of the filter membrane makes the impurities with a smaller size similar to the pore size of the filter membrane in the waste oil in a suspended state, and will not The pores of the filter membrane are blocked, but impurities larger than the pore size of the filter membrane cannot be suspended in the waste lubricating oil under the action of high-frequency vibration, and will be deposited on the surface of the filter membrane due to its own gravity, and then press on both sides of the filter membrane. Adsorbed to the surface of the membrane under the action of poor, and this adsorption is not easy to desorb under high-frequency vibration, which will cover the pores of the filter membrane, reduce the flux of the filter membrane, and reduce the separation efficiency

[0008] Secondly, the temperature of the dehydrated waste lubricating oil has been lowered, the viscosity is high, and the fluidity is poor. After such waste oil flows into the vibrating membrane separator, the flow rate is very slow, which prolongs the cycle of the process operation, and the viscous waste lubricating oil The oil molecules in the oil are tightly aggregated, and when the waste lubricating oil passes through the filter membrane, the accumulated oil molecules are easy to block the pores of the filter membrane. In addition, because the waste lubricating oil is very viscous, it is difficult to suspend small impurities similar to the pore size of the filter membrane. which easily clog the pores of the filter membrane

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