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Method for purifying drilling wastewater in oil and gas field

A drilling wastewater purification treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc., can solve problems such as failure to meet new sewage discharge standards, and achieve convenient movement and small treatment capacity , the effect of good application prospects

Inactive Publication Date: 2012-05-16
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current treatment method can only solve the problem of flocculation and sedimentation of wastewater, and the removal of harmful substances in wastewater is not ideal, especially COD and BOD 5 , SS, and oil seriously exceed the standard, and the existing wastewater treatment process can no longer meet the new sewage discharge standard stipulated by the state, and must be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Pulverization treatment: 10 kg of corn cobs from which corn particles have been removed are pulverized and passed through a 6 mm sieve;

[0027] (2) Baking at high temperature: sending the corn cob granules removed from the corn granules that were pulverized in step (1) into a blast drying oven, and baked at 250° C. for 2 hours to make a granular degradable flocculant;

[0028] (3) Flocculation treatment: put the granular degradable flocculant prepared in step (2) into 100kg of drilling wastewater, fully stir for 20 minutes, absorb the oil and suspended matter in the drilling wastewater on the flocculant, and float on the water surface;

[0029] (4) Settlement treatment: the oil and gas field drilling wastewater treated in step (3) was left standstill in the waste water pool for 2 hours, and the upper stratum floating matter was removed;

[0030] (5) Filtration treatment: the lower layer of wastewater processed in step (4) is treated with a filter area of ​​4m 2 Th...

Embodiment 2

[0035] (1) Pulverization treatment: 15 kg of corncobs that have been removed from the corn grains are pulverized and passed through a 10 mm sieve;

[0036] (2) Baking at high temperature: sending the corn cob granules removed from the corn granules that were pulverized in step (1) into a blast drying oven, and baked at 280° C. for 3 hours to make a granular degradable flocculant;

[0037] (3) Flocculation treatment: put the granular degradable flocculant prepared in step (2) into 200kg of drilling wastewater, fully stir for 30 minutes, absorb the oil and suspended matter in the drilling wastewater on the flocculant, and float on the water surface;

[0038] (4) Settlement treatment: the oil and gas field drilling wastewater treated in step (3) was left standstill in the waste water pool for 3 hours, and the upper strata floating matter was removed;

[0039] (5) Filtration treatment: the lower layer wastewater treated in step (4) is treated with a filtration area of ​​6m 2 The ...

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PUM

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Abstract

The invention discloses a method for purifying drilling wastewater in an oil and gas field. In the method, the integrated technology of purifying the drilling wastewater in the oil and gas field by using flocculation, precipitation, filtration, membrane filtration and oxidation methods is utilized, and the problem that the wastewater is difficult to manage and treat in the oil industry is solved.Simultaneously, for the characteristic of high dispersibility of drilling engineering in the oil and gas field, miniature filtration, membrane filtration and oxidation devices are adopted in the method and are arranged on a motor vehicle, so the special requirements of a plurality of points, wide area and frequent movement need of the drilling engineering are met.

Description

【Technical field】 [0001] The invention relates to the technical field of purification and treatment of oil and gas field drilling wastewater, in particular to an integrated treatment method for purifying oil and gas field drilling wastewater by using flocculation, sedimentation, filtration, membrane filtration and oxidation methods. 【Background technique】 [0002] During the drilling process of oil and gas fields, a large amount of drilling wastewater is produced. The particularity of drilling construction makes drilling wastewater have the characteristics of many points, wide area, complex pollution types, intermittent discharge and uncontrollable discharge. It has become one of the wastewater that is difficult to manage and treat in the petroleum industry. one. The current treatment method can only solve the problem of flocculation and sedimentation of wastewater, and the removal of harmful substances in wastewater is not ideal, especially COD and BOD 5 , SS, and oil seri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/72
Inventor 孙有光孙光远
Owner TIANJIN UNIVERSITY OF TECHNOLOGY