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Method for oil field sewage treatment

A technology for oilfield sewage and wastewater, applied in the field of oilfield sewage treatment, can solve the problems of inability to recycle useful substances, hidden dangers of environmental pollution, and high costs, and achieve the effects of significant environmental protection benefits, solving environmental pollution problems, and reducing costs.

Inactive Publication Date: 2017-09-19
江阴宇博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current domestic method of treating methanol-free "oilfield wastewater" is: reinjecting "oilfield wastewater" into the formation. Pollution hazard. Before reinjection, the "oilfield wastewater" scattered throughout the oilfield needs to be concentrated to the designated reinjection site. The cost of transporting "oilfield wastewater" is high, and the useful substances in "oilfield wastewater" cannot be recycled.

Method used

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Embodiment 1

[0011] A method for oilfield sewage treatment, using a reducing agent greater than 1ppm as an oxidizing agent, wherein the reducing agent contains ferrous ions, disulfides, organic compounds or contains at least one of the above and contains hydrogen peroxide, potassium permanganate, At least one of chlorine gas, sodium hypochlorite, calcium hypochlorite, sodium percarbonate, sodium perborate, ozone, and ultraviolet rays is used to oxidize waste water. Use trace heavy metal wastewater to add NaOH to adjust the pH value, so that the pH value is kept at 7.5-8. In an alkaline environment, heavy metals begin to flocculate to form micelles; The micelles are flocculated, and the trace heavy metal wastewater is pumped into the wastewater filtration device. In this embodiment, through the above treatment measures, the treatment of trace heavy metal wastewater is realized, so that heavy metals such as nickel, zinc, lead, chromium (trivalent), and strontium are less than 0.1 ppm.

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PUM

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Abstract

The invention provides a method for treating oilfield sewage, comprising: using a reducing agent greater than 1 ppm as an oxidizing agent, wherein the reducing agent contains ferrous ions, disulfides, organic compounds or contains at least one of the above and contains hydrogen peroxide , potassium permanganate, chlorine gas, sodium hypochlorite, calcium hypochlorite, sodium percarbonate, sodium perborate, ozone and ultraviolet rays are used to oxidize waste water. The method of the invention is simple and convenient to operate, low in cost, convenient for industrialized production, can achieve the purpose of reusing / reusing oilfield wastewater, and realizes comprehensive utilization of oilfield wastewater.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for oilfield sewage treatment. Background technique [0002] At present, "oilfield wastewater" is generally divided into two categories in China: one is "oilfield wastewater" containing methanol, and the other is "oilfield wastewater" that does not contain methanol. The current domestic method of treating methanol-free "oilfield wastewater" is: reinjecting "oilfield wastewater" into the formation. Pollution hazards. Before reinjection, the "oilfield wastewater" scattered throughout the oilfield needs to be concentrated to the designated reinjection site. The cost of transporting "oilfield wastewater" is high, and useful substances in "oilfield wastewater" cannot be recycled. Contents of the invention [0003] The invention provides a method for oilfield sewage treatment, which solves the defects in the prior art. [0004] In order to achieve the above object, the pres...

Claims

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Application Information

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IPC IPC(8): C02F1/70C02F1/72C02F1/76C02F1/78C02F1/32C02F9/04
CPCC02F1/70C02F1/001C02F1/32C02F1/66C02F1/705C02F1/72C02F1/722C02F1/76C02F1/78
Inventor 陈伟刚金龙华夏杜威
Owner 江阴宇博科技有限公司
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