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A process for recycling waste mineral oil

A technology of waste mineral oil and renewable resources, applied in the direction of lubricating composition, etc., can solve the problems affecting the continuity and smooth operation of the system, the ceramic filter is easily blocked, and cannot be fully utilized, etc., so as to reduce the amount of residue generated and prevent leachate. The effect of the precipitation and the reduction of the amount of waste residue

Active Publication Date: 2022-05-03
LUOYANG HAOHAI IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts two-stage heating in the disposal process, and the loss of heat energy is large. The ceramic filter used is easy to block. At the same time, the heavy oil is returned to the raw material tank, resulting in the accumulation of thick oil at the bottom of the raw material tank, which cannot be fully utilized, and affects the continuous and stable operation of the system.

Method used

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  • A process for recycling waste mineral oil

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Effect test

Embodiment 1

[0023] A process method for recycling waste mineral oil, the steps are as follows:

[0024] Taking the waste oil and sludge produced by a refinery as an example, the basic composition of the waste oil is 5-8% moisture, 0.3-0.6% ash, 1.1-2% mechanical impurities, and a density of 0.89kg / cm 3 ; The oil sludge is the bottom sludge of the refinery tank, with an oil content of 20-30%, and the rest is water and mechanical impurities. The specific disposal process is as follows:

[0025] 1. Pump the waste lubricating oil in the raw material tank to the pretreatment tank, settle and dehydrate it, and set up a vacuum system on the top of the pretreatment tank. The vacuum degree is 50 kPa, and the temperature at the top of the tower is 75 ° C. moisture;

[0026] 2. The pretreated raw materials are discharged from the middle and lower part, and then sent to the distillation tower through the pump and the double-tube filter in turn. The filtration accuracy of the double-tube filter is b...

Embodiment 2

[0032] A process method for recycling waste mineral oil, the steps are as follows:

[0033] Taking the waste oil and sludge produced by a refinery as an example, the basic composition of the waste oil is 5-8% moisture, 0.3-0.6% ash, 1.1-2% mechanical impurities, and a density of 0.89kg / cm 3 ; The oil sludge is the bottom sludge of the refinery tank, with an oil content of 20-30%, and the rest is water and mechanical impurities. The specific disposal process is as follows:

[0034] (1) Pump the waste lubricating oil in the raw material tank to the pretreatment tank, settle and dehydrate it, set up a vacuum system on the top of the pretreatment tank, the vacuum degree is 20 kPa, the temperature at the top of the tower is 60 ℃, and the low boiling matter is separated and moisture;

[0035] (2) The pretreated raw materials are discharged from the middle and lower parts, and then sent to the distillation tower through the pump and the double-cylinder filter in turn. The filtratio...

Embodiment 3

[0039] A process method for recycling waste mineral oil, the steps are as follows:

[0040] Taking the waste oil and sludge produced by a refinery as an example, the basic composition of the waste oil is 5-8% moisture, 0.3-0.6% ash, 1.1-2% mechanical impurities, and a density of 0.89kg / cm 3 ; The oil sludge is the bottom sludge of the refinery tank, with an oil content of 20-30%, and the rest is water and mechanical impurities. The specific disposal process is as follows:

[0041](1) Pump the waste lubricating oil in the raw material tank to the pretreatment tank, settle and dehydrate it, set up a vacuum system on the top of the pretreatment tank, the vacuum degree is 100 kPa, the temperature at the top of the tower is 90 ℃, and the low boiling matter is separated and moisture;

[0042] (2) The pretreated raw materials are discharged from the middle and lower parts, and then sent to the distillation tower through the pump and the double-cylinder filter in turn. The filtratio...

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Abstract

The invention provides a process method for waste mineral oil regeneration and resource disposal. The steps are as follows: pump the waste mineral oil to a pretreatment tank, carry out sedimentation and dehydration, and separate light oil and water; The raw materials are discharged from the middle and lower part of the pretreatment tank and sent to the distillation tower for distillation. The materials are heated by the heating furnace and then returned to the tower. The gas phase components in the distillation tower enter the product buffer tank after condensation and gas-liquid separation; the materials in the product buffer tank It is pumped to the refining tower for refining; the bottom material of the pretreatment tank and the filter residue are collected, and the heavy residue and high-viscosity waste oil at the bottom of the distillation tower are conveyed to the thermal desorption tank for treatment by screw. The invention proposes an efficient and large-scale treatment of various types of waste lubricating oil, with strong operability, simple process flow, deep recycling of heavy oil and high-viscosity oil, reduced residue generation, and greatly reduced follow-up disposal enterprises The operating cost is low, and the residual oil content can be as low as less than 1%.

Description

technical field [0001] The invention relates to the field of regeneration treatment of waste mineral oil, in particular to a process method for regeneration and resource disposal of waste mineral oil. Background technique [0002] Waste mineral oil mainly comes from industrial waste lubricating oil, waste hydraulic oil and waste heat transfer oil, waste engine oil produced by automobiles and other vehicles, and waste oil produced by oilfield mining and refining. Leakage, random discarding or improper disposal of waste mineral oil will cause huge pollution to soil and groundwater. It is listed as hazardous waste by the state, and the hazardous waste category is HW-08. The scientific and rational disposal of waste mineral oil has been a hotspot of extensive research. [0003] In recent years, with the rapid development of my country's economy, especially the rapid increase in manufacturing and automobile consumption, the output of waste mineral oil has also increased by leaps...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
CPCC10M175/0033
Inventor 徐品剧长生
Owner LUOYANG HAOHAI IND & TRADE