Gas production wastewater comprehensive treatment technology

A technology for comprehensive treatment of gas extraction wastewater, which is applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, and dispersed particle separation, etc. problems, to achieve the effect of excellent environmental protection and social benefits, small footprint, and reasonable treatment process

Active Publication Date: 2014-03-26
四川光隆环保科技有限公司
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Problems solved by technology

[0007] The purpose of the present invention is to provide a comprehensive treatment process for gas extraction wastewater, which solves the problems that the existing wastewater treatment process cannot completely remove hydrogen sulfide and stench in gas extraction wastewater, and cannot realize resource utilization

Method used

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Experimental program
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Effect test

Embodiment

[0044] Desulfurization purification pretreatment:

[0045] First, inject the gas production wastewater from 2 parties into the storage tank, heat it to 40°C by steam, and then pass the heated gas production wastewater into the oxidation reaction tank; add an appropriate amount of sulfuric acid to the oxidation reaction tank to adjust the gas production wastewater pH value to 4.8~5.5, then add proper amount of hydrogen peroxide according to the content of hydrogen sulfide in the wastewater, specifically according to H 2 When the S content is 10000mg / L, add 20kg of 30% hydrogen peroxide and fully stir for 10min; at this time, control the temperature in the oxidation reaction tank within the range of 38~42℃, fully stir and react for 1h, the hydrogen sulfide in the gas production wastewater is It can be completely converted into colloidal sulfur to achieve desulfurization; according to the national standard method analysis and test, the H in the wastewater after oxidation desulfurizat...

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Abstract

The invention discloses a gas production wastewater comprehensive treatment technology which solves the problems that hydrogen sulfide and stink in the gas production wastewater can not be thoroughly removed and resource utilization can not be realized by the existing wastewater treatment technology. The technology comprises the following treatment processes of: desulfurization purification pretreatment, quadruple-effect evaporation crystallization treatment and tail gas deodorization treatment. Through three wastewater treatment processes, standard treatment of the existing organism-containing gas production wastewater with high sulfur content and salt content is realized; the treatment technology has a reasonable flow, the equipment is mounted compactly and occupies a small area, and the technology is conveniently matched with other technologies; and moreover, the investment cost, the operation cost and the comprehensive energy consumption are low, and the environmental protection benefits and social benefits are obviously superior to those of other technical schemes.

Description

Technical field [0001] The invention relates to a comprehensive treatment process for gas production wastewater. Background technique [0002] Gas field water is formation water with a higher degree of salinity that is produced with the natural gas extraction process. The quality and quantity of gas field water vary greatly depending on the gas well and the stage of gas production. The water in the Puguang gas field is complex in composition, deep in color, and accompanied by a strong odor. It mainly contains high levels of pollutants such as hydrogen sulfide, oil, chloride, suspended matter, mineral salts, and organic matter. [0003] The Puguang Gas Field is a large-scale, high-yield, super-large marine integrated gas field that has been put into production in my country. Is the domestic proven high content of H 2 S and CO 2 The largest gas field. The current mixed gas production capacity has further increased to 150×10 8 m 3 / a level. Most production wells produce waste water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10B01D53/75
Inventor 向荣王启华舒忠军
Owner 四川光隆环保科技有限公司
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