Method for removing polyacrylamide and other organic matters in oilfield exploration water and electrochemical reactor

A technology of polyacrylamide and reactor, applied in the direction of electrochemical water/sewage treatment, water pollutants, chemical instruments and methods, etc., can solve environmental pollution and other problems, achieve good treatment effect, easy to scale up, and increase mass transfer rate Effect

Inactive Publication Date: 2007-09-26
DAQING GASOLINEEUM INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that it is difficult to effectively remove the polyacrylamide and other organic matter contained in the oilfield produced water that adopts polymer flooding according to the current general sewage treatment method in the oilfield, resulting in environmental pollution after being discharged, the present invention provides an effective A method for removing polyacrylamide and other organic substances contained in oilfield tertiary oil recovery water and an electrochemical treatment device specially designed for implementing this method

Method used

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  • Method for removing polyacrylamide and other organic matters in oilfield exploration water and electrochemical reactor
  • Method for removing polyacrylamide and other organic matters in oilfield exploration water and electrochemical reactor
  • Method for removing polyacrylamide and other organic matters in oilfield exploration water and electrochemical reactor

Examples

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Effect test

Embodiment 1

[0035] Example 1: Under normal temperature and pressure, the reactor is operated intermittently, using polymer-containing produced water collected from Daqing Oilfield, the volume of the water sample is 300ml, filtered, and sulfuric acid is added to adjust the pH value to 3.0, the applied DC voltage is 6V, and the current density 150A / m 2 , the electrode effective area is 12cm 2 , using a titanium-based electrode coated with ruthenium-iridium oxide layer as the anode, the cathode as stainless steel, no diaphragm is set between the cathode and the anode, and the pole distance is 1.5cm. Samples were taken at regular intervals, and various parameters of the water samples were measured after filtration. The experimental data measured are shown in Table 1.

[0036] parameters

as it is

15min

30min

45min

HPAM(mg / L)

COD (mg / L)

406.42

717.93

98.5

305.68

39.75

105.8

17.25

70.85

[0037] ...

Embodiment 2

[0039] Example 2: The applied DC voltage is 3.6V, and the current density is 50A / m 2 , other operating conditions are the same as in Example 1, COD=150.45mg / L during 45min treatment, COD removal rate is 79.04%, HPAM=65.83mg / L, HPAM removal rate is 83.8%.

Embodiment 3

[0040] Example 3: Under normal temperature and pressure, the reactor operates continuously, using poly-containing produced water collected from Daqing Oilfield, the volume of the reaction zone is 300ml, the hydraulic retention time is 30min, the water sample is filtered, and the pH value is adjusted to 3.0 by adding sulfuric acid , the applied DC voltage is 6V, and the current density is 150A / m 2 , the electrode effective area is 12cm 2 , using a titanium-based electrode coated with ruthenium-iridium oxide layer as the anode, the cathode as stainless steel, no diaphragm is set between the cathode and the anode, and the pole distance is 1.5cm. Samples are taken at regular intervals, and various parameters of the water samples are measured after filtration. COD=92.43mg / L was measured at 90min treatment, COD removal rate was 87.13%, HPAM=40.25mg / L, HPAM removal rate was 90.1%.

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Abstract

The invention discloses a method to remove polyacrylamide and other organic matter in oil field produced water and electrochemical reactor to accomplish this method, which comprises the following steps: injecting tertiary produced water into electrochemistry reactor with catalytic anode; exerting direct current voltage; generating hypochlorous acid; forming strong oxidizer; advancing degradation of organic matter; oxidative disintegrating more polyacrylamide and other organic matter to small molecule organic matter by generated hydroxyl free radical of polarized catalyze anode; mineralizing most of organic matter; removing. This invention can make COD value of oil field poly waste water down to about 100mg / L and each index reach one level discharge standard of nation.

Description

Technical field: [0001] The invention relates to a method for removing polyacrylamide and other organic substances contained in oilfield tertiary oil recovery water and an electrochemical treatment device specially designed for implementing the method. Background technique: [0002] Polymer flooding is a new technology for tertiary oil recovery. In recent years, most oilfields in eastern my country, especially Daqing Oilfield, have basically entered the late stage of high water cut, and tertiary oil recovery technology has entered the stage of industrial application in Daqing Oilfield. Since 1996, polymer flooding technology has entered into industrial production one after another. In 2000, the oil production of polymer flooding reached 900×10 4 more than t, accounting for 17% of the oil production of Daqing Oilfield in that year. Accompanied by crude oil produced annually 6000×10 4 Polymer-containing sewage above t. The polymer injected into the oil field is anionic part...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F101/38
Inventor 张翼范洪富张荣庆刘蕾王磊
Owner DAQING GASOLINEEUM INST
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