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Method for degrading polymer-containing waste water in oil field by using improved Fenton system

An improved oilfield technology, applied in water/sewage treatment, chemical instruments and methods, reduced water/sewage treatment, etc., can solve the problems of difficult to effectively degrade poly-containing sewage, expensive reagents, insufficient degradation, etc., to achieve enhanced oxidation Degradation effect, low price, effect of improving utilization rate

Inactive Publication Date: 2019-08-16
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for degrading poly-containing sewage in oilfields with an improved Fenton system in order to solve the problem that existing water treatment methods are difficult to effectively degrade poly-containing sewage, and the reagents are expensive and the degradation is insufficient.

Method used

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  • Method for degrading polymer-containing waste water in oil field by using improved Fenton system
  • Method for degrading polymer-containing waste water in oil field by using improved Fenton system

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specific Embodiment approach 1

[0030] Specific implementation mode one: the present implementation mode is a kind of improved Fenton system degrading the method for oil field poly-containing sewage and is finished according to the following steps:

[0031] 1. Add H to the oilfield wastewater containing polymer 2 o 2 solution and Fe 2+ Reagent, obtain solution A;

[0032] H in solution A described in step 1 2 o 2 The concentration is 3mmol / L~11mmol / L;

[0033] Fe in solution A described in step 1 2+ The concentration is 0.5mmol / L~1.5mmol / L;

[0034] Two, add ascorbic acid in solution A, then stir reaction, obtain the sewage that removes polyacrylamide;

[0035] Ascorbic acid described in step 2 and Fe in solution A 2+ The molar ratio is (1~10):1.

[0036] The beneficial effect of this implementation mode:

[0037] 1. The improved Fenton system used in this embodiment can efficiently degrade poly-containing sewage, which solves the problems of difficult degradation of poly-contained sewage and low d...

specific Embodiment approach 2

[0043] Embodiment 2: This embodiment differs from Embodiment 1 in that: the temperature of the oil field poly-containing sewage described in step 1 is 20°C-60°C, and the stirring speed is 400r / min-600r / min. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0044] Specific implementation mode three: the difference between this implementation mode and specific implementation modes one or two is: the H described in step one 2 o 2 The mass fraction of the solution is 30%. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for degrading polymer-containing waste water in an oil field by an improved Fenton system. The invention relates to a method for degrading polymer-containing waste water in an oil field, and mainly aims to solve the problems that the polymer-containing waste water is difficult to degrade effectively, reagents are expensive, and degradation is not complete in the existing water treatment method. The method comprises the following steps: 1, adding a H2O2 solution and a Fe<2+> reagent into polymer-containing waste water of an oil field; and 2, adding ascorbic acid, and carrying out a stirring reaction to obtain the polyacrylamide-removed waste water. By using the improved Fenton system, the method can be used for efficiently degrading the polymer-containing waste water. The problems that polymer-containing waste water is difficult to degrade and the degradation efficiency of a traditional degradation mode is low are solved. When the method is used for degrading the polyacrylamide in the polymer-containing waste water of the oil field, the degradation efficiency can reach 85-95%. The method is suitable for degrading polymer-containing waste water in anoil field.

Description

technical field [0001] The invention relates to a method for degrading poly-containing sewage in oil fields. Background technique [0002] With the increasingly depleted oil reserves, the oil and gas industry is relying on advanced technologies to increase the production of existing oil wells and oil fields. Oil displacement efficiency. In a broad sense, polyacrylamide is a macromolecular substance polymerized by acrylamide monomer or copolymer and other monomers or copolymers, usually with a molecular weight of several million. These macromolecular substances will eventually be discharged to the Environment. Increasing demand for enhanced oil recovery technologies in the oil and gas industry is driving the growth prospects of the global PAM market over the next few years. According to a Transparency Market Research report, the global PAM market is projected to grow at a steady rate with a CAGR of 6.3% during the period 2017 to 2025. It will increase from $4.5 billion in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72C02F101/38C02F103/10
CPCC02F1/70C02F1/722C02F1/725C02F2101/38C02F2103/10C02F2305/026
Inventor 王忠华何明祺赵海谦杨雪尹新元刘晓燕王秋实李栋
Owner NORTHEAST GASOLINEEUM UNIV
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