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Harmless treatment method for separation and recovery of oily sludge

A technology of harmless treatment and sludge separation, applied in the fields of sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. The effect of convenient management, low cost and efficient separation

Active Publication Date: 2015-02-11
MAIWANG INT BUSINESS SHANGHAI
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  • Abstract
  • Description
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Problems solved by technology

Although there are many processing methods, they all have certain limitations in application, lack of systematic process, and cannot complete the whole process processing

Method used

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  • Harmless treatment method for separation and recovery of oily sludge

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Embodiment Construction

[0023] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0024] see figure 1 , In the treatment method of the present invention, the following high solid content treatment device 1, three-phase centrifuge 2, oil-water separator 3, oil storage tank 4, thermal desorption device 5, and oily wastewater advanced treatment system 6 are used to form. The technological process step of present embodiment is as follows:

[0025] A. The oily sludge is transported to the high solid content treatment device 1, and the large particle impurities in the oil sludge are initially screened and the sludge is tempered. The specific operation process is to pre-condition the oil sludge through steam heating, stirring and tempering, scraping and conveying, vibration screening and other pre-conditioning steps, and then conduct preliminary screening and sludge conditioning for large particles of impurities in the oil sludge.

[0026] B. ...

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Abstract

A harmless treatment technology for separation and recovery of oily sludge comprises the following steps: 1, conveying the oily sludge to a high solid content treatment device, carrying out preliminary screening on large granule impurities in the oily sludge, and conditioning the sludge; 2, conveying pre-conditioned oily sludge to a three-phase centrifuge, and separating oil, water and mud in the oily sludge; 3, conveying the obtained separated liquid to an oil-water separation device, and further carrying out oil and water separation; 4, inputting the obtained oil phase to an oil storage tank, and inputting water to an oily wastewater advanced treatment system; 5, conveying the obtained solid phase sludge transported to a thermal desorption device, and carrying out heating curing separation and condensation oil-water separation in a thermal desorption treatment process; and 6, conveying water output by the oil-water separation device and water output by the thermal desorption device to the oily wastewater advanced treatment system, and carrying out advanced oil-water separation. The method has the advantages of low cost oily sludge treatment cost, convenient maintenance and management, high efficiency and good stability.

Description

technical field [0001] The invention relates to an environmental protection treatment process, in particular to a harmless treatment process for oil sludge separation and recovery. Background technique [0002] Oily sludge is one of the main pollutants produced in the process of oilfield development, storage and transportation, and if the oily sludge is not treated in a timely and effective manner, it will have varying degrees of impact on the production area and the surrounding environment. Because oily sludge contains sulfides, benzene series, phenols, anthracene, pyrene and other toxic and harmful substances with odor, and some hydrocarbons contained in crude oil have carcinogenic, teratogenic and mutagenic effects, oily sludge in oil fields Sludge is classified as hazardous solid waste (HW08) by the state and managed as hazardous waste. At present, the methods for treating oily sludge at home and abroad generally include: incineration, biological treatment, hot washing,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F9/14
CPCC02F1/001C02F1/004C02F1/24C02F1/40C02F9/00C02F11/00C02F11/127C02F11/14C02F2301/08
Inventor 葛稚颖
Owner MAIWANG INT BUSINESS SHANGHAI
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