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Treatment method of oil extraction wastewater containing anionic polyacrylamide

A technology of polyacrylamide extraction and polyacrylamide, which is applied in the field of treatment of anion-containing polyacrylamide oil extraction wastewater, can solve the problems of waste of resources, secondary pollution, and high cost of oil extraction wastewater, so as to reduce treatment costs, reduce waste, and process Effects with easy-to-control parameters

Active Publication Date: 2016-01-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for treating oil production sewage containing anionic polyacrylamide, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing polyacrylamide-containing sewage treatment agent exists in the process of treating oil production sewage. Secondary pollution, high cost of oil production wastewater treatment and waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: The treatment method of the anion-containing polyacrylamide oil extraction sewage is carried out according to the following steps: the first step, an appropriate amount of inorganic flocculant is dissolved in water and prepared into a mass-volume concentration of 10g / L to 30g / L Inorganic flocculant aqueous solution; the second step is to add the required amount of inorganic flocculant aqueous solution and magnetic nano particle dispersion liquid with a mass percentage of 3% to 5% to the oil extraction wastewater containing anionic polyacrylamide under stirring state and react The reaction solution is obtained, wherein: per liter of anionic polyacrylamide oil production sewage, the dosage of inorganic flocculant is 50 mg to 500 mg, the dosage of magnetic nanoparticles is 50 mg to 300 mg, the pH value in the reaction is 6.5 to 8, and the reaction The temperature is 25°C to 65°C, the stirring speed is 50r / min to 300r / min, and the stirring time is 10min to 30...

Embodiment 2

[0016] Embodiment 2: The treatment method of the anion-containing polyacrylamide oil extraction sewage is carried out according to the following steps: the first step, an appropriate amount of inorganic flocculant is dissolved in water and prepared into a mass-volume concentration of 10g / L or 30g / L Inorganic flocculant aqueous solution; the second step is to add the required amount of inorganic flocculant aqueous solution and 3% or 5% by mass magnetic nanoparticle dispersion to the oil extraction wastewater containing anionic polyacrylamide under stirring and react The reaction liquid is obtained, wherein: per liter of anionic polyacrylamide oil production sewage, the dosage of inorganic flocculant is 50 mg or 500 mg, the dosage of magnetic nanoparticles is 50 mg or 300 mg, the pH value in the reaction is 6.5 or 8, and the reaction The temperature is 25°C or 65°C, the stirring speed is 50r / min or 300r / min, and the stirring time is 10min or 30min; the third step is to leave th...

Embodiment 3

[0017] Embodiment 3: The treatment method of the anion-containing polyacrylamide oil production sewage is carried out according to the following steps: the first step, an appropriate amount of inorganic flocculant is dissolved in water to prepare an aqueous solution of inorganic flocculant whose mass-volume concentration is 10g / L The second step is to add the required amount of inorganic flocculant aqueous solution and 3% magnetic nanoparticle dispersion liquid by mass percentage to the oil recovery sewage containing anionic polyacrylamide under agitation and react to obtain a reaction liquid, wherein: each In the oil production sewage containing anionic polyacrylamide, the dosage of inorganic flocculant is 50mg, the dosage of magnetic nanoparticles is 50mg, the pH value in the reaction is 6.5, the reaction temperature is 25°C, and the stirring speed is 50r / min. The stirring time is 10 minutes; in the third step, the reaction liquid is left standing for 2 minutes under the ac...

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Abstract

The invention relates to the technical field of treatment of oil production wastewater containing polyacrylamide in oil fields, and relates to a treatment method for oil recovery wastewater containing anionic polyacrylamide, which is carried out according to the following steps: adding a required amount of an aqueous solution of an inorganic flocculant to the anionic polyacrylamide-containing oil recovery wastewater reacting with the magnetic nano particle dispersion liquid to obtain a reaction liquid, and standing the reaction liquid under the action of magnetic force to obtain a production liquid treatment liquid. The method for treating oil recovery wastewater containing anion polyacrylamide according to the present invention can reduce the content of anion polyacrylamide in oil recovery wastewater containing anion polyacrylamide, and the separation efficiency of anion polyacrylamide is 80% to 90%, which improves the anion The separation efficiency of polyacrylamide, the oil production sewage treated by the treatment method of anion-containing polyacrylamide oil production sewage according to the present invention can be recycled, which reduces the treatment cost of oil production sewage, and has the advantage of easy control of process parameters. , reducing the waste of resources.

Description

technical field [0001] The invention relates to the technical field of treatment of oil field sewage containing polyacrylamide, and relates to a method for treating oil production sewage containing anion polyacrylamide. Background technique [0002] At present, my country's polymer flooding technology widely uses polymers, namely anionic polyacrylamide, for oil displacement. Because of its good water solubility and thickening properties, it can greatly increase the recovery of crude oil. Therefore, anionic polyacrylamide is used in polymer flooding. It has been widely used in oil extraction, but it also produces a large amount of oil extraction wastewater. In the oil production sewage, the content of anionic polyacrylamide is high, the viscosity is high and the degree of emulsification is high. Therefore, when the oil production sewage is separated from the oil and water, the anionic polyacrylamide is difficult to separate from the oil production sewage, and there is a proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/48C02F103/10
Inventor 黄强曾玉彬杨萍萍吴仲岿姚玉萍付蕾王爱军刘国良郑帅王乙福房东毅
Owner BC P INC CHINA NAT PETROLEUM CORP