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Dirty oil dewatering process for refinery and oil field

A process and oil field technology, applied in the field of ultrasonic treatment new process, can solve the problems of difficult recycling of dirty oil, difficult to remove water and impurities in dirty oil, environmental pollution, etc., and achieve the goal of improving utilization value, processing capacity and high economic value Effect

Inactive Publication Date: 2006-03-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned technology is difficult to remove a large amount of water and impurities in the waste oil, the waste oil is difficult to recycle, causing environmental pollution and other problems, and proposes a method that the water-containing waste oil enters the heat settling tank for sedimentation and separation after ultrasonic treatment. The process of water-containing waste oil entering the heat settling tank with ultrasonic function for oil-water separation

Method used

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  • Dirty oil dewatering process for refinery and oil field
  • Dirty oil dewatering process for refinery and oil field
  • Dirty oil dewatering process for refinery and oil field

Examples

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Effect test

Embodiment 1

[0032] Ultrasonic frequency 28kHz. The heavy dirty oil with an initial water content of about 75% adopts the technology of the present invention (ultrasonic action part adopts figure 2 , image 3 processing device), after being subjected to an ultrasonic wave for 5 minutes, it is sent to a heat settling tank (temperature 80°C) for 4 hours, and the oil and water are separated rapidly, and the oil and water are divided into 3 layers. The average water content of the light oil layer after stripping is less than 1%, which can be directly used as distillate oil for refining or re-refining; the heavy oil slurry in the lower part of the oil layer has a water content of about 45%.

Embodiment 2

[0034] For the dirty oil (comprising the upper part light oil layer and the lower part heavy oil) after the dehydration of embodiment 1, carry out ultrasonic wave (frequency 28kHz) action again for 3 minutes after preheating, after the long-time thermal settlement (temperature 85 ℃) of heat settling tank, the oil layer The total moisture content is less than 28%. According to the recycling method of waste oil, it can be directly re-smelted or continue multiple cycles of dehydration to achieve the purpose of recycling.

Embodiment 3

[0036]Ultrasonic frequency 40kHz. The heavy dirty oil with an initial water content of about 75% adopts the technology of the present invention (ultrasonic action part adopts figure 2 , image 3 After 10 minutes of ultrasonic treatment, it is sent to a heat settling tank (at a temperature of 70°C) for 4 hours, and the oil and water are separated rapidly, and the sewage in the lower layer accounts for 51%. The volume is reduced by half.

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Abstract

The present invention relates to dirty oil dewatering process, and is especially ultrasonic treatment process of dewatering dirty oil in refinery and oil field to recover oil. Water containing dirty oil is first ultrasonic treated in ultrasonic treater with ultrasonic field of standing wave and traveling wave before being oil-water separated in a heat deposition tank, or water containing dirty oil is oil-water separated in a heat deposition tank with standing wave and traveling wave ultrasonic treater. The technological process adopts physical demulsifying process to dewater, has high dirty oil adaptability, no influence of dirty oil property, fast oil-water separation, high dewatering rate, and low operation cost. The present invention is significant in dirty oil recovering and reducing environmental pollution.

Description

technical field [0001] The invention relates to a waste oil dehydration process; in particular, it relates to a novel ultrasonic treatment process for dehydration of light waste oil and heavy waste oil in a refinery and dehydration and recovery of oil field waste oil. Background technique [0002] A certain amount of dirty oil is produced during the production process of refineries or oil fields, and has a wide range of sources and large differences in properties. Produced by processes such as crude oil tank water cut, roof reduction tank water cut, equipment shutdown and line sweeping, equipment cleaning, and electro-refining, the form of dirty oil is complex, including oil-in-water, water-in-oil, multi-layer coating, etc., and serious emulsification , has a strong oil-water interfacial tension. Slop oil from oil fields and refineries often contains various additives, colloids, asphaltene, and solid particles, which are not easy to demulsify and dehydrate. In the actual p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/32
Inventor 吕效平彭飞叶国祥韩萍芳董巍巍宗松
Owner NANJING UNIV OF TECH
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