Treatment method of oily sludge

A sludge treatment and oil sludge technology, which is applied in the fields of sludge treatment, water/sludge/sewage treatment, immiscible solvent sludge treatment, etc. requirements and other issues, to achieve the effect of being suitable for large-scale promotion and application, saving resources, and using simple methods.

Inactive Publication Date: 2017-10-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The oily sludge treatment method provided by the prior art has poor treatment effect on oily sludge, and the water content in the obtained c...

Method used

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  • Treatment method of oily sludge

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0028] Embodiments of the present invention provide a method for treating oily sludge, the method comprising the following steps:

[0029] Remove mechanical impurities with a diameter greater than 2mm in oily sludge.

[0030] The oily sludge is aerated and gritted.

[0031] The oily sludge after sand settling treatment is crushed, and then demulsifier and water are added to carry out the first oil-water separation treatment to collect the upper oil slick from the oily sludge.

[0032] Cut, stir and squeeze the oily sludge from which the upper layer of oil has been removed, remove mechanical impurities with a diameter greater than 1mm in the oily sludge, add demulsifier and water again, and carry out the second oil-water separation treatment, and then remove the oily sludge from...

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Abstract

The invention discloses a treatment method of oily sludge, and belongs to the sludge treatment field. The method includes steps of removing mechanical impurities of which diameter in the oily sludge is more than 2 mm; performing aeration and sand setting treatment on the oily sludge; smashing the oily sludge after the sand setting treatment, and then adding demulsifier and water to perform the first oil water separating treatment, so as to collect upper floating oil in the oily sludge; cutting, mixing and extruding the oily sludge after removing the upper floating oil, and removing the mechanical impurities of which diameter in the oily sludge is more than 1 mm; further adding the demulsifier and water and performing a second oil water separating treatment; collecting oil water mixture from the oily sludge; mixing the upper floating oil with the oil water mixture and performing a third oil water separating treatment; acquiring purified oil. The treatment method of oily sludge has good treatment effect of the oily sludge, and can fully use the purified oil, water and mud after being treated.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a treatment method for oily sludge. Background technique [0002] In the process of crude oil extraction, oily sludge will accumulate at the bottom of the crude oil treatment tank of the oil field joint station and the corrosion perforation of the oil pipeline, and oily sludge will also be generated during the operation of the sewage station. These oily sludges are hazardous solid wastes, with a relatively high oil content, generally 10-50%, a water content of 30-80%, and a mud content of 10-20%. Oily sludge will pollute the environment, so it cannot be discharged directly, and it will waste resources if it is piled up to dry or buried. Therefore, it is very necessary to provide a method capable of recycling oily sludge. [0003] The prior art provides a method for treating oily sludge. The specific steps are: pumping the oily sludge into an electric floating device to separate ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/12C02F11/14C02F11/18C02F1/40C02F103/36
CPCC02F11/00C02F1/40C02F11/002C02F11/127C02F11/14C02F11/18C02F2103/365C02F2303/24C02F2303/26
Inventor 窦勤光赵丽孟威李昆马伟娜李彦华
Owner PETROCHINA CO LTD
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