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Gas production wastewater desulfurization purification pretreatment technology

A technology for gas extraction wastewater and pretreatment, which is applied in mining wastewater treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc. , The effect of reasonable process flow and low comprehensive energy consumption

Active Publication Date: 2014-06-18
四川光隆环保科技有限公司
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a desulfurization and purification pretreatment process for gas extraction wastewater to solve the problem that the existing wastewater treatment methods cannot completely remove hydrogen sulfide in gas extraction wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] 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, the H in the wastewater after oxidative desulfurizati...

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PUM

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Abstract

The invention discloses a gas production wastewater desulfurization purification pretreatment technology which solves the problem that hydrogen sulfide in the gas production wastewater can not be thoroughly removed by the existing wastewater treatment method. The technology comprises the following steps of: (1) removing hydrogen sulfide in the gas production wastewater by a chemical oxidation method; and (2) separating colloidal sulfur and impurity suspended solids in the gas production wastewater by a coagulation filtering method. According to the technology disclosed by the invention, 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 pretreatment process for desulfurization and purification 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/72C02F1/52C02F1/56C02F103/10
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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