Gas production wastewater comprehensive treatment technology

A technology for comprehensive treatment of gas extraction wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, dispersed particle separation, etc., can solve the problem of inability to completely remove hydrogen sulfide from gas extraction wastewater and resource utilization, etc. problems, to achieve the effect of excellent environmental protection and social benefits, small footprint, and low operating costs

Active Publication Date: 2013-07-24
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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Embodiment

[0044] Desulfurization purification pretreatment:

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

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

Claims

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Application Information

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Patent Type & Authority Applications(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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