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Free-pollution cyclic regeneration pre-treatment technology of waste lubricating oil

A technology of waste lubricating oil and pretreatment, applied in the direction of lubricating composition, etc., can solve the problems of unclear interface, corrosion, difficult separation, etc.

Active Publication Date: 2018-09-28
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a pollution-free waste lubricating oil continuous regeneration pretreatment process, which can not only effectively solve the problems of corrosion of subsequent devices caused by organic chlorine in the regeneration process of waste lubricating oil, pipeline blockage and catalyst poisoning, but also Solve the problems of unclear interface and difficult separation during propane refining, and easy fouling on fractionation tower trays during vacuum distillation, improve the yield of refined oil, and provide high-quality raw materials for subsequent hydrogenation units

Method used

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  • Free-pollution cyclic regeneration pre-treatment technology of waste lubricating oil
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  • Free-pollution cyclic regeneration pre-treatment technology of waste lubricating oil

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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the waste lubricating oil raw material from the raw material tank a reaches 130°C after heat exchange, and enters the dehydration tower b. After dehydration and impurity removal, the raw material is heat exchanged to 260°C and enters the chemical dechlorination reactor with a stirring device c, carry out dechlorination reaction; the waste lubricating oil is dechlorinated by chemical reaction and then enters the heating furnace, is heated to 370°C and then enters the hydrogen heat treatment reactor d, stays at 370°C for 120min; then enters the heat exchanger and is heat exchanged to 200°C, enter the atmospheric flash tower e to remove light oil; the raw material after light oil removal is heat exchanged to 70°C, and then pumped to 4.8MPa to enter the propane refining unit f, additives in waste lubricating oil and high temperature Condensate produced by oxidation, colloids, asphaltene, metal salts produced by organic acid corrosion of metals, an...

Embodiment 2

[0031] Such as figure 1As shown, the waste lubricating oil raw material from the raw material tank a reaches a temperature of 130°C after heat exchange, and enters the dehydration tower b. After dehydration and impurity removal, the raw material is heat exchanged to 305°C and enters the chemical dechlorination reactor with a stirring device c, carry out dechlorination reaction; the waste lubricating oil is dechlorinated by chemical reaction and then enters the heating furnace, is heated to 330°C and then enters the hydrogen heat treatment reactor d, stays at 330°C for 60 minutes; then enters the heat exchanger and is heat exchanged to 180°C, enter the atmospheric flash tower e to remove light oil; the raw material after removing water and light oil is heat exchanged to 90°C, and then pumped to 4.5MPa to enter the propane refining unit f, additives in waste lubricating oil And the condensate produced by high-temperature oxidation, colloid, asphaltenes, metal salts produced by o...

Embodiment 3

[0033] Such as figure 1 As shown, the waste lubricating oil raw material from the raw material tank a reaches 130°C after heat exchange, and enters the dehydration tower b. After dehydration and impurity removal, the raw material is heat exchanged to 320°C and enters the chemical dechlorination reactor with a stirring device c, carry out dechlorination reaction; the waste lubricating oil is dechlorinated by chemical reaction and then enters the heating furnace, is heated to 380°C and then enters the hydrogen heat treatment reactor d, stays at 380°C for 90 minutes; then enters the heat exchanger and is heat exchanged to 230°C, enter the atmospheric flash tower e to remove light oil; the raw material after light oil removal is heat-exchanged to 95°C, and then pumped to 5.5MPa to enter the propane refining unit f, additives in waste lubricating oil and high temperature Condensate produced by oxidation, colloids, asphaltene, metal salts produced by organic acid corrosion of metals...

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Abstract

The invention provides a free-pollution cyclic regeneration pre-treatment technology of waste lubricating oil. The process comprises the steps of chemical reaction dechloridation, hydrogenation heat treatment, atmospheric flashing, propane refining and reduced pressure distillation. Through the chemical reaction dechloridation, the problems about corrosion of organic chloride to the subsequent devices, pipeline blockage and catalyst poisoning during regeneration can be solved; through hydrogenation heat treatment, additives in the waste lubricating oil can be destroyed, ash formation matter istransformed into residues which can be removed through filtration, and the problems are solved that during propane refining, an interface is not clear and separation is difficult, and during reducedpressure distillation, fractionating tower plates scale. After light oil is drawn out through atmospheric flashing, the additives, metal salt, oxide condensation compounds, colloid and asphaltenes inthe waste lubricating oil are removed through propane refining, and finally, light components are effectively separated from the base oil through reduced pressure distillation. By means of the technology, undesired components in the waste lubricating oil can be effectively removed, high-quality raw materials are provided for subsequent hydrogenation refining, and long-period running of the subsequent hydrogenation device is ensured.

Description

technical field [0001] The invention belongs to the fields of hazardous waste recovery, environmental protection and petrochemical industry, and relates to a pollution-free continuous regeneration pretreatment process of waste lubricating oil. Background technique [0002] During the process of mechanical transmission and lubrication, lubricating oil is subjected to high-temperature catalytic oxidation, which will produce oxidized condensates, colloids, asphaltene, metal salts produced by organic acid corrosion of metals, and will also be mixed with external environment and mechanical wear. Metal powder, water, dust, oil and other impurities contaminate lubricating oil, making it reduce or even lose the functions of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. Since a large amount of valuable lubricating oil base oil in waste lubricating oil has not aged and deteriorated, the recycling and utilization of waste lubricating oil is not only ...

Claims

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Application Information

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IPC IPC(8): C10M175/00
CPCC10M175/0016C10M175/0033C10M175/0041C10M175/005C10M175/0083
Inventor 张先茂王栋斌王泽王国兴周正夏大寒吴阳春王瑜陈宗杰
Owner WUHAN KELIN FINE CHEM
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