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Oil-removing treatment process of oil-containing sludge

A treatment process, oil sludge technology, applied in sludge treatment, water/sludge/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of high treatment cost and low treatment efficiency, and achieve low operating temperature , Lower deoiling temperature, lower equipment requirements

Inactive Publication Date: 2007-09-19
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The technical problem to be solved by the present invention is to provide an economical, rapid and effective oily sludge deoiling treatment process in order to solve the problems of high treatment cost and low treatment efficiency in the existing oily sludge treatment process

Method used

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  • Oil-removing treatment process of oil-containing sludge
  • Oil-removing treatment process of oil-containing sludge
  • Oil-removing treatment process of oil-containing sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Oily sludge (black, massive) from a sewage station in an oil field, with a water content of 60% and an oil content of 14%. Utilize the specific process of the present invention to deal with: at first the oily sludge is pumped into the preheating conditioning tank (6), and the cleaning liquid that enters the cleaning liquid storage tank (10) is mixed evenly according to the mass ratio of dry mud and water as 1: 32, in Heat while stirring. After the preheating temperature reaches 55°C, the sludge enters the ultrasonic irradiation device (7). The ultrasonic frequency of oily sludge is about 28kHz, and the ultrasonic sound intensity is 6×10 3 w·m -2 The residence time in the ultrasonic reverberation field is 20min. The oily sludge irradiated by ultrasound enters the aeration flotation tank (8), and after 20 minutes of flotation (air flotation gas-liquid ratio 1×10 2 m 3 m -3 ) After that, the dirty oil in the oily sludge is separated from the sludge, and the dirty oil...

Embodiment 2

[0036] Other conditions are the same as in Example 1, but the operating conditions are changed: the preheating temperature is 60° C., the ultrasonic frequency is about 28 kHz, and the ultrasonic sound intensity is 4×10 3 w·m -2 , the ultrasonic irradiation time is 15min, the mass ratio of sludge to cleaning water is 1:32, the air flotation time is 20min, and the gas-liquid ratio is about 2×10 2 m 3 m -3 , the gravity settling time is 3h, and the whole process removes 73% of dirty oil.

Embodiment 3

[0038] Other conditions are the same as in Example 1, but the operating conditions are changed: preheating temperature is 50° C., ultrasonic frequency is about 28 kHz, and ultrasonic sound intensity is 4×10 3 w·m -2 , the ultrasonic irradiation time is 15min, the mass ratio of sludge to cleaning water is 1:64, the air flotation time is 20min, and the gas-liquid ratio is about 2×10 2 m 3 m -3 , the gravity settling time is 3h, and the whole process removes 69% of dirty oil.

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Abstract

The invention provides a method of treating oiliness sludge in oil field or refinery, which is economical, quick, and large-scaled in use. The method applies thermally washing oiliness sludge by a hyperacoustic washing apparatus with a low frequency and a highpower, then assisting to air flotation, in order to effectively recycle the dirty oil in sludge. The whole art is provided with four treating units of a warm-up conditioning, a hyperacoustic irradiation, an aerating flotation, and gravity settling. It does not have any medicament, so is without a secondary pollution. The invention recycles cleaning liquid.

Description

technical field [0001] The invention relates to the treatment of oily sludge in oilfields, refineries or other fields, in particular to a treatment process which can utilize ultrasonic and air flotation flotation combined technology to recover waste oil in oily sludge and reduce the oil content in sludge. technical background [0002] At present, the method of early water injection to maintain formation pressure is adopted in my country's oil field production. With the deep exploitation of oil fields, the muddy water content in the produced crude oil is getting higher and higher, and a large amount of oily mud sand will be produced in the crude oil dehydration treatment process in the combined station. [0003] At the same time, in the process of oily sewage treatment in oil fields, the treatment of small solid particles that are difficult to settle naturally in the sewage is a more difficult problem. The particle size of these solid particles is very small, and forms a sta...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F1/24C02F1/36C02F1/40C02F103/10
Inventor 韩萍芳王文祥张萍吕效平
Owner NANJING UNIV OF TECH
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