Novel processing method for oil field drilling waste water

A technology for oil field drilling and wastewater treatment, applied in the directions of oxidized water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of solving treatment problems and reducing treatment costs

Inactive Publication Date: 2008-01-30
SHANGHAI ZHONGYOU ENTERPRISE GRP CO LTD
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Problems solved by technology

[0010] Therefore, the purpose of the present invention is to provide an economical and practical treatment method for oilfield drilling wastewater to solve the problem of drilling wastewater in my country's oil industry for the problems existing in the existing treatment technology.

Method used

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Examples

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Effect test

Embodiment Construction

[0017] The present invention will be further described in detail below through examples.

[0018] First, polyaluminum was used for coagulation pretreatment of drilling wastewater. The coagulation treatment effects of different polyaluminum concentrations are shown in Table 1 under the condition of pH value of 4.7. Coagulation treatment has a good effect on the removal of organic matter in drilling wastewater, and the removal rate of TOC can reach 90.9%. After coagulation pretreatment, the residual TOC value on page 7 / 8 of the drilling wastewater specification is about 168.5mg / l . The drilling wastewater after coagulation treatment was oxidized by ozone oxidation, and the results are shown in Table 2. It can be seen from the results in Table 2 that after 30 minutes of oxidation, the removal rate of TOC in wastewater is about 54.9%, the BOD value of wastewater increases from 10 mg / l before oxidation to 60 mg / l, and the value of BOO / TOc rises from 0.06 to 0.79 . Obviously, ozo...

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Abstract

The invention relates to a wastewater purification treatment technique field. The novel wastewater treatment method for oil field drilling of the invention is that: first coagulation pretreatment to drilling wastewater is carried out, and ferrum series and aluminum series inorganic flocculating agents or ferrum aluminum series complex flocculating agent or the combination of the flocculating agents are adopted, then the solid and liquid is separated, and the treated liquid after coagulation pretreatment enters into chemical oxidation process and then is discharged, finally qualified treated wastewater is acquired.

Description

technical field [0001] The invention relates to the technical field of wastewater purification treatment. Background technique [0002] Due to the addition of a large number of mud treatment agents in drilling mud, the quality of drilling wastewater is very complicated. Its main characteristics are ① high concentration of COD, usually in the range of thousands to tens of thousands of mg / l, and most of them are biodegradable organic substances; ② high chroma; ③ high content of suspended solids. [0003] Usually, a drilling wastewater pool is excavated at the drilling site to store this part of the wastewater, which easily causes soil, surface and groundwater pollution. Therefore, after the drilling operation is completed, they must be disposed of harmlessly. Background Art At present, great efforts have been invested in the development of drilling wastewater treatment technology at home and abroad, and some effective technologies have also been formed. Some treatment techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/72
Inventor 翁天波
Owner SHANGHAI ZHONGYOU ENTERPRISE GRP CO LTD
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