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Degrading and viscosity reducing process for sewage containing oil and polymer

A technology for polymer and oily sewage, applied in the field of oilfield sewage treatment, can solve the problems of complex reactor, large amount of sludge, complex process, etc., and achieve the effects of simple reactor structure, small amount of sludge, and simple process

Inactive Publication Date: 2007-03-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to solve the problems of secondary pollution, complex reactor, complex process, large amount of sludge and high power consumption in the existing polymer-containing produced water treatment method in oil fields; Degradation and Viscosity Reduction Method of Polymer Sewage

Method used

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  • Degrading and viscosity reducing process for sewage containing oil and polymer
  • Degrading and viscosity reducing process for sewage containing oil and polymer
  • Degrading and viscosity reducing process for sewage containing oil and polymer

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specific Embodiment approach 1

[0035] Specific embodiment one: the present invention is as follows to the step of oil field sewage treatment: one, the sewage that contains polymer is passed in the reactor 1 that anode 2, negative electrode 3 and agitator 5 are housed, two, agitator 5 is in Slow stirring, under the condition of normal temperature, the acidic medium in the reactor 1, the cell voltage of 10-30V, 75-80mA / cm 2 The current density is treated under the action of anode 2 and cathode 3 for 20min to 50min. It can realize the viscosity reduction of sewage and the degradation of organic pollutants and emulsified oil, and can meet the requirements of reinjection water and discharge water quality after being filtered by quartz sand.

specific Embodiment approach 2

[0036] Embodiment 2: The acidic medium in step 2 of this embodiment is HCl, and its pH=1-6, and the others are the same as Embodiment 1.

specific Embodiment approach 3

[0037] Specific embodiment three: In this embodiment, an additive is added in step two, and the additive is NaCl or CaCl 2 , the others are the same as those in Embodiment 1.

[0038] Additives contain a lot of Cl - , with Cl on anode 2 2 Precipitated, and Cl 2 It is beneficial to the degradation of organic matter and has a bactericidal effect.

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Abstract

The present invention relates to oil field effluent treating technology, and is especially degrading and viscosity reducing process for sewage containing oil and polymer. The oil field effluent treating process includes the following steps: 1. introducing the polymer containing effluent into reactor with anode, cathode and stirrer; and 2. treating the effluent for 20-50 min through slow stirring at normal temperature, the action of the acidic medium inside the reactor and the action of the anode and cathode. The present invention has the advantages of simple technological process, simple reactor structure, high treating effect, small sludge amount, low power consumption, no secondary pollution and capacity of treating different kinds of oil field water.

Description

technical field [0001] The invention relates to a treatment method for oilfield sewage, in particular to a treatment method for viscosity reduction and degradation of sewage containing oil and polymers. Background technique [0002] Polymer flooding is a new technology for tertiary oil recovery, which has entered the stage of industrial application in Daqing Oilfield. The annual output of polymer flooding has reached 9 million tons. With the annual production of more than 60 million tons of polymer-containing sewage from crude oil, a large amount of polymer-containing sewage cannot be reinjected after being treated with existing technologies and can only be discharged outside, causing environmental pollution. Therefore, sewage treatment and reuse is very important. [0003] Partially hydrolyzed polyacrylamide (abbreviated as HPAM) is currently one of the two most commonly used polymer flooding agents in oilfields. It enhances the recovery of crude oil by increasing the swee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46
Inventor 马军张翼范洪富
Owner HARBIN INST OF TECH
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