Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for pretreatment and refining of waste lubricating oil

A waste lubricating oil and pretreatment technology, applied in the direction of lubricating composition, etc., can solve the problems of long treatment period, difficult to ensure stable oil quality, high operating cost, etc., achieve stable and continuous operation, ensure separation and cutting quality, and operate Simple and convenient effect

Active Publication Date: 2017-11-07
深圳至诚环境科技有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process disclosed in this patent document, a single-fraction heat transfer oil is used as the hydrogenation raw material. Pre-removal of impurities before hydrogenation may cause problems such as rapid loss of catalyst activity, short life and easy coking
[0006] For another example, the Chinese patent document CN102989468A (document three) discloses a continuous distillation process for the regeneration of waste lubricating oil, using steps including visbreaking heat treatment, flash evaporation, and vacuum distillation to obtain high-quality raw materials for subsequent hydrogenation, However, this patented technology has obvious technical defects. For example, the technology uses high-temperature visbreaking, which will produce more olefins and colloids, which will greatly reduce the viscosity index of the product, deteriorate the quality of the base oil product, and reduce the product yield. According to calculations and the content disclosed in Document 3 itself, the residual oil rate of the product is higher than 13%; and the plate and frame, belt filter, swirl and other processes implemented in Document 3 at relatively high temperatures not only increase the process cost, but also exist Certain potential safety hazards (the operating temperature involved is above the flash point, ignition point, or even the spontaneous ignition point of the oil)
[0007] It can be seen that the waste lubricating oil treatment technologies used in the prior art, especially the pretreatment and refining technologies, still have limited processing capacity, potential pollution risks to the environment, high operating costs, complicated processes, long treatment cycles, and post-treatment waste. The quality of oil products is difficult to be guaranteed stably and the degree of resource utilization is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for pretreatment and refining of waste lubricating oil
  • A method for pretreatment and refining of waste lubricating oil
  • A method for pretreatment and refining of waste lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: This specific embodiment describes a typical pretreatment refining process according to the technical solution of the present invention.

[0042] First, a waste lubricating oil feedstock used in a typical embodiment was tested. Table 1 lists the properties of waste lubricating oil and the test results of related components.

[0043] Table 1 Analysis of properties of waste lubricating oil raw materials

[0044]

[0045]

[0046] The waste lubricating oil filtered through the temperature-controlled sedimentation copper screen and exchanged heat is heated in the heating furnace, and when the waste lubricating oil is heated in the heating furnace, it is fed to the heating furnace (the heating furnace typically Convection-radiant furnace tubes where steam can be injected into the furnace where the convective section is converted to a radiant section, e.g. figure 1 shown) inject steam, and the waste lubricating oil heated by the heating furnace enters the r...

Embodiment 2

[0057] Embodiment 2: This embodiment is another typical scheme of the waste lubricating oil pretreatment and refining process of the present invention. In the present embodiment, the same process steps as in Example 1 can be used, and the process steps and / or process parameters different from those in Example 1 will be described in detail below; the process parameters in Example 2 are further optimized, and lower process parameters can be obtained. The residual oil rate of the refined treatment.

[0058] In the pretreatment and refining process of this embodiment, the first distillate oil accounting for 5% of the total weight of waste lubricating oil and the raw material waste lubricating oil are mixed into the heating furnace to dilute the raw material oil, reduce the viscosity, and prevent it from being heated in the heating furnace. Coking too fast; while the other first distillate oil is heated to 400°C for heating and vaporization, and then mixed with the hot waste raw ma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
boiling pointaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for pretreatment and refining of waste lubricating oil, which comprises a heating step of heating the waste lubricating oil in a heating furnace, a mixing step of entering the waste lubricating oil heated by the heating furnace into a refiner through a high-temperature mixer, and a refining step in said refiner. The rectification of the present invention adopts high-vacuum spray fractionation, and the exchange and renewal quality reflux technology in the over-vaporized oil furnace, successfully removes various impurities in waste lubricating oil, especially oil-soluble metal impurities and organic impurities, effectively reducing The yield of heavy residual oil is high, and the pretreated oil with stable quality can be obtained, which can meet the requirements of catalysts for raw materials in catalytic cracking, hydrogenation and other processes, and can meet the requirements of large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of treatment, recovery and reuse of industrial waste, in particular, the invention relates to a waste oil treatment, especially a method for refining and pretreatment of waste lubricating oil. By adopting the method of the invention, industrial waste lubricating oil can be recycled stably and continuously with high efficiency and low cost. Background technique [0002] In industrial production and use, lubricating oil is subjected to oxidation, thermal decomposition and impurity pollution in various machinery and equipment, and its physical and chemical properties reach the respective oil change indicators. The replaced oil is collectively called waste lubricating oil. Therefore, waste lubricating oil is a hazardous waste that is scrapped, polluted, high-temperature oxidized, and has lost its original properties. It is mixed with sediment, metal particles, water, light oil components, and organic compounds s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
Inventor 李义张长茂张巨龙刘彦昌
Owner 深圳至诚环境科技有限公司