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Method and system for treating petroleum refining wastewater electro-desalting black liquor

A technology for refining and chemical wastewater and treatment methods, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as abnormal sewage treatment system, achieve stable operation and simple process , a wide range of effects

Active Publication Date: 2014-04-30
XIAN LANRUI MECHANICAL & ELECTRICAL EQUIP
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AI Technical Summary

Problems solved by technology

Some refineries are currently at a loss for electro-desalination black liquor, diluting it with a large amount of reclaimed water before entering the sewage treatment system, resulting in abnormalities in the sewage treatment system

Method used

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  • Method and system for treating petroleum refining wastewater electro-desalting black liquor

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Embodiment Construction

[0030] The present invention is described in further detail below in conjunction with accompanying drawing:

[0031] A method for treating petroleum refining waste water electric desalination black liquor, comprising the following steps:

[0032] 1) Transport the electric desalination black liquor to the homogeneous buffer device, and after settling for 1 to 2 hours, transport the slick oil floating on the upper layer of the liquid to the oil slick collection tank, and pass the oily wastewater in the lower layer through the water pump (the pressure of the water pump is set to 0.1-0.3MPa.) Pumped into the filter to filter the suspended particulate matter in the wastewater to a content less than or equal to 5mg / L; the filter is filled with a filter element made of a modified fiber material with hydrophilic and oleophobic properties.

[0033] Among them, during the filtering operation, it also includes backflushing the filter with clean water or air to obtain backflush effluent c...

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Abstract

The invention discloses a method and a system for treating petroleum refining wastewater electro-desalting black liquor, and belongs to the technical field of chemical equipment. According to the technical scheme, the method comprises the following steps: delivering the electro-desalting black liquor to a homogenizing buffer tank for sedimentation treatment, collecting floating oil, pumping oily wastewater into a filter by using a water pump, and removing suspended matters until every liter of oily wastewater contains less than or equal to 5 micrograms of suspended matters; delivering the filtered wastewater to an oil-water separator, separating oil to a collection tank in the oil-water separator, and externally draining or delivering the effluent of the separator to other facilities, wherein every liter of effluent of the oil-water separator contains less than or equal to 10 micrograms of oil. The method is short in treatment time, high in treatment speed, free of secondary pollution, safe and effective; the system is simple in structure, easy to operate and convenient to maintain, can safely and reliably operate, and has good treatment effects, and secondary pollution can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a treatment method and system for electric desalination black liquor of petroleum refining waste water. Background technique [0002] In recent years, the development of most oilfields has entered a period of high water cut. With the implementation of secondary and tertiary oil recovery technologies in oilfields, the amount of chemicals used in oilfields has continued to increase, resulting in increasingly thicker and heavier crude oil, increased salt content, and more emulsified phenomena. The application of various extraction technologies makes crude oil mostly produced in the form of emulsion. A large number of polymer substances, surfactants, emulsifiers, and other oil field measures added during crude oil extraction enter the crude oil, resulting in complex crude oil components, increased impurities, and reduced crude oil quality. After the crude oil ...

Claims

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Application Information

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IPC IPC(8): C02F9/02
Inventor 孙洪桥杨欣燃党威吴昊
Owner XIAN LANRUI MECHANICAL & ELECTRICAL EQUIP
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