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A process for treating produced water in a sour gas field

A gas field produced water and treatment technology technology, which is applied in mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems of no evaporation of mother liquor and difficulty in zero discharge of gas production wastewater, etc. To achieve the effect of reducing dosage, reducing environmental hazards, and reducing environmental hazards

Active Publication Date: 2017-09-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent application does not involve the treatment of sulfur-containing gas field water, and is only applicable to non-sulfur-containing gas field water. There is no treatment method for evaporating mother liquor in this patent, and there is no treatment method for ammonia nitrogen contained in gas production wastewater. It is difficult to achieve zero discharge of gas production wastewater

Method used

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  • A process for treating produced water in a sour gas field
  • A process for treating produced water in a sour gas field
  • A process for treating produced water in a sour gas field

Examples

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Effect test

Embodiment 1

[0035] A treatment process for produced water from a sulfur-containing gas field, characterized in that it includes the following process steps:

[0036] The first step: stripping the produced water from the sour gas field;

[0037] The second step: the liquid after the first step is subjected to air blowing to remove sulfur;

[0038] The third step: pre-evaporating the liquid after the second step, after the liquid is pre-evaporated by 30%, perform multi-effect evaporation, the distilled water produced by multi-effect evaporation and pre-evaporation is subjected to ammonia nitrogen blow-off treatment, and the mother liquor produced by multi-effect evaporation Electrolytic catalytic oxidation treatment is carried out.

[0039] Specifically, as figure 1 Shown, processing step of the present invention is as follows:

[0040] The produced water from the sulfur-containing gas field is passed into the natural gas stripper, and then natural gas is passed into the natural gas stri...

Embodiment 2

[0048] A treatment process for produced water from a sulfur-containing gas field, characterized in that it includes the following process steps:

[0049] The first step: stripping the produced water from the sour gas field;

[0050] The second step: the liquid after the first step is subjected to air blowing to remove sulfur;

[0051] The third step: pre-evaporating the liquid after the second step, after the liquid is pre-evaporated by 25%, perform multi-effect evaporation, the distilled water produced by multi-effect evaporation and pre-evaporation is subjected to ammonia nitrogen blow-off treatment, and the mother liquor produced by multi-effect evaporation Electrolytic catalytic oxidation treatment is carried out.

[0052] Specifically, the processing steps of the present invention are as follows:

[0053] The produced water from the sour gas field is passed into the natural gas stripper, and then natural gas is passed into the natural gas stripper. The amount of natural...

Embodiment 3

[0062] A treatment process for produced water from a sulfur-containing gas field, characterized in that it includes the following process steps:

[0063] The first step: stripping the produced water from the sour gas field;

[0064] The second step: the liquid after the first step is subjected to air blowing to remove sulfur;

[0065] The third step: pre-evaporate the liquid after the second step, after the liquid is pre-evaporated by 20%, perform multi-effect evaporation, the distilled water produced by multi-effect evaporation and pre-evaporation is subjected to ammonia nitrogen blow-off treatment, and the mother liquor produced by multi-effect evaporation Electrolytic catalytic oxidation treatment is carried out.

[0066] Specifically, the processing steps of the present invention are as follows:

[0067]The produced water from the sour gas field is passed into the natural gas stripping tower, and then natural gas is passed into the natural gas stripping tower. The amount...

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PUM

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Abstract

The invention discloses a process for treating the produced water of a sulfur-containing gas field, which comprises the following process steps: the first step: performing stripping treatment on the produced water of a sulfur-containing gas field; the second step: performing air stripping on the liquid after the first step Desulfurization treatment; the third step: pre-evaporating the liquid after the second step, after the liquid is pre-evaporated by 20% to 30%, perform multi-effect evaporation, and the distilled water generated by pre-evaporation is subjected to ammonia nitrogen stripping treatment, multi-effect evaporation The resulting mother liquor is subjected to electrolytic catalytic oxidation treatment. The invention can fully recover most of the substances in the produced water of the sulfur-containing gas field, realize zero discharge, and do not pollute the surrounding environment.

Description

technical field [0001] The invention belongs to the field of natural gas exploitation, and in particular relates to a treatment process for stratum produced water brought out during the exploitation of sulfur-containing gas fields. Background technique [0002] During the exploitation of sour gas fields, produced water will be brought out of the formation. The current technology actually adopted for the produced water of sour gas fields is reinjection after pretreatment. The most commonly used treatment method is reinjection, but the reinjection treatment method has certain limitations, and not all gas field produced water in all regions are suitable for this method. , such as the western Sichuan Basin, due to the compact formation and complex hydrogeological conditions, the reinjection of produced water is greatly restricted. A large amount of chemical oxidizing agents and flocculants need to be added in the reinjection pretreatment process. Not only is the cost high, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F103/10
Inventor 王敏曾向东刘真凯李硕祁建祥周小舟王光明张洁
Owner CHINA PETROLEUM & CHEM CORP
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