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Dirty oil dewatering process for refinery and oil field

An oil field and process technology, which is applied in the field of new ultrasonic treatment technology, can solve the problems of difficult recycling of dirty oil, environmental pollution, and difficulty in removing water and impurities in dirty oil, and achieves the improvement of utilization value, high economic value, and improved processing capacity. Effect

Inactive Publication Date: 2009-07-01
NANJING TECH UNIV
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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 that the initial water content is 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 invention relates to a waste oil dehydration process; in particular, it relates to a new ultrasonic treatment process for dehydration of light waste oil and heavy waste oil in a refinery and dehydration recovery of oil field waste oil. The water-containing sewage oil enters the heat settling tank for oil-water separation after passing through the ultrasonic treatment device with a standing wave or traveling wave in the ultrasonic processor, or the water-containing sewage oil enters the heat settling tank with a standing wave or traveling wave ultrasonic device for oil-water separation. This process belongs to the physical demulsification dehydration method, which has strong adaptability to waste oil, is not affected by the properties of oil, and can quickly realize oil-water separation; it can realize oil-water separation in a short time, shorten the heat settling time and increase the final dehydration rate, Low operating costs. The technology is used to recycle the dirty oil, reduce pollution sources, and has good environmental protection and social benefits.

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 Patents(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 TECH UNIV
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