Method for recycling polymer-containing air flotation oil sludge

A sewage sludge and recycling technology, applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of occupying large cultivated land, soil, water body air pollution, etc., and solve the problem of environmental pollution Effect
CN103626367AInactive Publication Date: 2014-03-12CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2014-03-12
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to treatment of oil sludge in oil fields and in particular relates to a method for recycling polymer-containing air flotation oil sludge. Through the method, a mutual effect between hydroxy-aluminium and a polymer is released due to an acid-soluble aluminum effect, and the thickness and stability of a water-in-oil emulsification colloidal particle interface membrane are reduced due to compression and curling effects on a double electric layer of the polymer of hydrogen ions, so that soluble aluminum, broken emulsion, the hydroxy-aluminium, the polymer and crude oil can be separated from one another; the separated crude oil is purified and then recycled; after the pH of the polymer is adjusted, the polymer is dried and crushed, and then can be taken as an additive of oil well cement; an acid solution with dissolved aluminum is taken as an aluminum source and applied to synthesis of aluminium polychlorid. Through the method, the environmental pollution caused by the polymer-containing air flotation oil sludge can be avoided, the crude oil can be recycled, the waste polymer and an aluminium-containing flocculating agent can be recycled, and the waste is changed into wealth.
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Description

technical field

[0001] The invention relates to the treatment of oily sludge in oilfields, in particular to a method for resource recovery and reuse of oily sludge containing air-accumulated floating sludge. Background technique

[0002] The composition of oilfield oily sludge is very complex, mainly crude oil, machine impurities and water. However, in oil fields using polymer flooding and ASP flooding, the composition of oily sludge is more complex, which also contains a large amount of polymers and surfactants for oil flooding.

[0003] With the development of my country's oilfields, the use of enhanced oil recovery methods such as polymer flooding and ASP flooding in the late stage of oilfield exploitation makes the produced fluid contain a relatively high concentration of polymers, which are produced during the treatment of polymer-containing sewage in the combined station. A large amount of polymer-containing oily sludge, especially the air-floated sludge produced by th...

Claims

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