1. technical name

High-value utilization technology for distillation, refining and high-value utilization of industrial waste oil.

2. scope of application

Raw material pretreatment for existing waste oil recycling and recycling enterprises and waste lubricating oil treatment for automobile repair points and enterprise equipment replacement.

3. technical content

3.1 technical principle

(1) Taking waste lubricating oil as an object, establish an evaluation method for the composition, structure and distribution of fused ring aromatic hydrocarbons, halogenated hydrocarbons, toluene insoluble matters, residual additives or metallic organic compounds, aging by-products, etc. in waste lubricating oil, systematic analysis of distilled subcomponents and refined products, combined with analysis of the physical and chemical properties, pollution degree, and processability of waste lubricating oil, based on the technical and economic potential of resource utilization, Establish an indicator system for evaluating the quality of waste lubricating oils, establish an evaluation indicator system for hazardous waste attributes and resource attributes, and clarify the hazardous waste attributes and resource attributes of waste lubricating oils, distillation subcomponents and products, as well as the characteristics of hazardous waste pollutants in the process of disposal and utilization. The migration and transformation laws in the process form a technical and economic evaluation method for the disposal and utilization of industrial waste oil.

(2) A new catalyst formulation and preparation process were developed, and the structure-activity relationship between the catalyst and residual oil catalytic upgrading was established, a corresponding catalyst screening plan was formed, and the catalytic upgrading of industrial waste oil distillation residual oil and its resource utilization technology was proposed to achieve safe disposal and high-value utilization of residual oil.

This technology has a processing capacity of 12000L/h for deep dehydration and impurity removal of waste oil under extreme conditions such as ultra-high vacuum, with residual acid value as low as 0.03 mgKOH/g, and residual moisture as low as 30mg/L; The effective separation temperature of key technologies of ultra-short-range molecular distillation is 130℃~ 220℃ lower than that of traditional processes, and can operate at around 220℃; the hydrodesulfurization rate and denitrification rate reach more than 95%.

3.2 main innovations

(1) There are no specific conditions during the use of this technology. It mainly ensures a stable supply of hydrogen source during the hydrorefining process, that is, it can meet stable operation.

(2) Relatively low sensitivity to environmental interference and is not affected by regions. It can be coupled with chemical production processes to achieve efficient utilization of hydrogen, a by-product of relevant chemical enterprises, and form a joint production of chemical-waste oil recycling, with reasonable matching of the technical chain.

(3) Full-component disposal and high-value utilization of industrial waste oil are realized, with stable process, technical economy and environmental friendliness.

4. Pollution control or environmental restoration effects

This technology can reduce the emissions of waste gas, waste residue and wastewater from waste oil refining, and increase the yield of base oil in waste oil refining to 85%~ 90%. After treatment, the salt content of the oil is less than 3mg/L, the water content of the oil is less than 300mg/L, and the oil content of the external drainage water does not exceed 150μg/g.

5. Technology demonstration

Chongqing Tuwei Environmental Protection Technology Co., Ltd. has a key technology project for the full-component resource utilization of 10,000 tons of waste oil, with a project scale of 30,000 tons/a. The project has realized the conversion of waste oil into high-quality and different types of oil products. The ultimate vacuum (residual pressure) is only 0.5 Pa, the working vacuum (residual pressure) is 600Pa, the distillation temperature is 200℃, and the hydrorefining pressure is 7.8 MPa. After testing and calculation, energy consumption can be saved by 20%~ 30% for every ton of waste oil processed. It meets the resource needs of bulk waste oil.

6. investment estimation

Taking the main production unit of 30,000 tons/a spent lubricant regenerated high-end base oil (including pretreatment units, hydrorefining units, and post-fractionation units) as an example, the total investment is about 15 million yuan.

7. investment recovery period

Taking the main production unit of 30,000 tons/a spent lubricant regenerated high-end base oil (including pretreatment units, hydrorefining units, and post-fractionation units) as an example, the static investment payback period is 0.396 years.

8. Prospects for transformation and promotion of technological achievements

This technology is based on environmental protection and improvement of resource utilization rate, and promotes industrial waste oil disposal and high-value utilization technology. It can not only process 20,000 to 30,000 tons of industrial waste oil every year, but also generate 20 to 30 million yuan. Economic benefits have effectively promoted energy conservation and emission reduction in the waste oil recycling industry and have broad application prospects.