Method for processing oily sludge in oil field

A treatment method and technology for oil sludge, which are applied in the fields of sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. Cost, simple effect of dehydration process

Inactive Publication Date: 2013-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The landfill method is only suitable for treating sludge with low oil content, but it may still pollute the soil and groundwater

Method used

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  • Method for processing oily sludge in oil field

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preliminary treatment of sludge

[0027] Set up a stacking pool, 520 tons of oily sludge collected from the production unit, with a water content of 93% and 1.2% crude oil, put it into the stacking pool 13 for natural settlement for 1 day, and remove larger solids in the original oily sludge. Phase objects, if the collected oily sludge does not contain larger solid phase objects or the content is small, it can be directly processed in the next step;

[0028] 2. Dewatering of oily sludge

[0029] The liquid phase oily sludge in the stacking tank is pumped into the filter tank 1, and is preliminarily filtered through a 5-mesh filter. After the preliminary filtration, 518 tons of oily sludge are obtained, and the flocculant polyacrylamide is added according to 1 / 1000 of its mass. After stirring at a speed of 30 rpm for 30 minutes, the screw dehydrator 2 is used for dehydration treatment. After dehydration, the moisture content of the oily sludge is 62%, and the volume ...

Embodiment 2

[0037] 1. Preliminary treatment of sludge

[0038] Set up a stacking pool, 658 tons of oily sludge collected from the production unit, with a water content of 95% and a crude oil content of 1.6%, is put into the stacking pool 13 for natural settlement for 1.5 days, and the larger solids in the original oily sludge are removed. Phase objects, if the collected oily sludge does not contain larger solid phase objects or the content is small, it can be directly processed in the next step;

[0039] 2. Dewatering of oily sludge

[0040] The liquid phase oily sludge in the stacking tank is pumped into the filter tank 1, and is preliminarily filtered through a 5-mesh filter. After the preliminary filtration, 650 tons of oily sludge is obtained, and the flocculant polyacrylamide is mixed according to 3 / 1000 of its mass. After stirring at a speed of 30 rpm for 30 minutes, the screw dehydrator 2 is used for dehydration treatment, and the moisture content of the dehydrated oily sludge is ...

Embodiment 3

[0048] 1. Preliminary treatment of sludge

[0049] Set up a stacking pool, 956 tons of oily sludge collected from the production unit, with a water content of 97% and 1.3% crude oil, put it into the stacking pool 13 for natural settlement for 2 days, and remove larger solids in the original oily sludge. Phase objects, if the collected oily sludge does not contain larger solid phase objects or the content is small, it can be directly processed in the next step;

[0050] 2. Dewatering of oily sludge

[0051] The liquid-phase oily sludge in the stacking tank is pumped into the filter tank 1, and is initially filtered through a 5-mesh filter. After the preliminary filtration, 951 tons of oily sludge is obtained, and the flocculant polyacrylamide is added according to 1 / 1000 of its mass. After stirring at a speed of 30 rpm for 30 minutes, the screw dehydrator 2 is used for dehydration treatment, and the moisture content of the dehydrated oily sludge is 50%.

[0052] 3. Primary an...

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Abstract

The invention discloses a method for processing oily sludge in an oil field, which comprises the following steps of: carrying out filter pressing and filtering after primarily filtering; under the heating state of 90-120DEG C, filtering by a filter screen of 18-35 meshes; carrying out secondary filtering by the filter screen of 70-120 meshes; adding emulsion breaker and heating to 45-60DEG C; standing until three phases of oil, water and solid are layered; separating upper-layer liquid to obtain crude oil; separating middle-layer liquid to obtain free water; after the crude oil and the free water are obtained, naturally drying the residual slag until the moisture content is less than 40%; and mixing at the volume ratio of slag to fire coal of (2-3):10 to obtain fuel. The method for processing oily sludge in an oil field has high crude oil recovery rate, more than 50% of crude oil in the oily sludge can be recovered, the processing cost of the oily sludge is indirectly lowered, and the economic value for processing the oily sludge is greatly improved.

Description

technical field [0001] The invention relates to a method for treating sludge contained in an oil field. The contained sludge is treated as a resource, so that the contained sludge has a certain recycling value. Background technique [0002] In the production process of oilfield enterprises, a large amount of oily sludge is inevitably produced, such as crude oil storage, tank bottom sludge at processing plant stations, landing sludge during well washing operations, oily sludge caused by oil pipe damage, etc. The composition of oily sludge is complex, and the main component of water accounts for 90-98% of the total volume. If it is directly discharged without treatment, it will seriously damage the natural environment. In addition, if the oily part of crude oil in oily sludge can be extracted and recycled, it can be used Reducing the pollution of oily sludge to the environment can also maximize the utilization of oily sludge resources. Therefore, it is necessary to design a n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/14C10G1/00C02F103/10
Inventor 彭旭聂汝生秦鹏辉贾勇军高汉英樊江胡坤张晓燕孙为民李洪林
Owner CHINA PETROLEUM & CHEM CORP
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