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Rejection processing technology for gas production wastewater in sulfur acid containing gas field

A technology for gas extraction wastewater and treatment process, which is applied in mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. and other problems, to achieve the effect of low construction and operation cost, extended use time and simple management

Active Publication Date: 2014-06-25
SHANGHAI EMPEROR OF CLEANING HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technology to be solved by the present invention is that in order to overcome the difficulty in meeting the A3 standard in the SY / T5329-94 clastic rock reservoir water injection water quality recommendation standard in the prior art for the treatment of sulfuric acid gas field gas production wastewater, it will eventually lead to damage to the water injection pipe road, affect the service life of water injection wells, and even affect the quality of groundwater, and provide a sulfuric acid-containing gas field gas production wastewater reinjection treatment process

Method used

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  • Rejection processing technology for gas production wastewater in sulfur acid containing gas field

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Effect test

Embodiment 1

[0078] A trial production test was carried out on the gas production wastewater of a certain gas field (see attached figure 1 ), the system design water volume is 360m 3 / d, influent (most data) indicators are: general SS is 230~680mg / L, median particle size is 55μm~115μm, oil is 55mg / L~100mg / L, sulfur is 250mg / L~1200mg / L, SRB bacteria 10,000 / mL~30,000 / mL, TGB bacteria 300,000 / mL~800,000 / mL, iron bacteria 100,000 / mL~400,000 / mL, total iron 25mg / L~60mg / L, corrosion rate 2.350mm / a ~9.500mm / a.

[0079] All the above-mentioned treatment processes are carried out in a closed container, and the technological process used is as follows: the acid gas field gas extraction wastewater is degreasing and suspended matter, then desulfurized by aeration, desulfurized by chemical oxidation, and then coagulated. It enters the settler for mud-water separation, then sterilizes, and then enters the dual-media filter for filtration, then enters the fiber bundle filter for filtration, and then pas...

Embodiment 2

[0109] A trial production test was carried out on the gas production wastewater of a certain gas field (see attached figure 1 ), the system design water volume is 150m 3 / d. Influent water (most data) indicators are: general SS is 200-650mg / L, particle size median is 45μm-100μm, oil is 50mg / L-95mg / L, sulfur is 120mg / L-1200mg / L, SRB bacteria is 10000 / mL~30000 / mL, TGB bacteria 300000 / mL~700000 / mL, iron bacteria 300000 / mL~400000 / mL, total iron 25mg / L~50mg / L, corrosion rate 2.350mm / a~8.950mm / a.

[0110] All the above-mentioned treatment processes are carried out in a closed container, and the technological process used is as follows: the acid gas field gas extraction wastewater is degreasing and suspended matter, then desulfurized by aeration, desulfurized by chemical oxidation, and then coagulated. It enters the settler for mud-water separation, then sterilizes, and then enters the dual-media filter for filtration, then enters the fiber bundle filter for filtration, and then...

Embodiment 3

[0140] A trial production test was carried out on the gas production wastewater of a certain gas field (see attached figure 1 ), the system design water volume is 120m 3 / d. Influent water (most data) indicators are: general SS is 240-760mg / L, median particle size is 55μm-120μm, oil is 55mg / L-80mg / L, sulfur is 200mg / L-800mg / L, SRB bacteria are 10000 / mL~30000 / mL, TGB bacteria 300000 / mL~800000 / mL, iron bacteria 300000 / mL~400000 / mL, total iron 25mg / L~50mg / L, corrosion rate 1.350mm / a~8.550mm / a.

[0141] All the above-mentioned treatment processes are carried out in a closed container, and the technological process used is as follows: the acid gas field gas extraction wastewater is degreasing and suspended matter, then desulfurized by aeration, desulfurized by chemical oxidation, and then coagulated. It enters the settler for mud-water separation, then sterilizes, and then enters the dual-media filter for filtration, then enters the fiber bundle filter for filtration, and then...

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Abstract

The invention discloses a rejection processing technology for gas production wastewater in sulfur acid containing gas field. The rejection processing technology for gas production wastewater in sulfur acid containing gas field comprises the following steps: enabling the sulfur acid containing gas field gas production wastewater to be successively subjected to suspension and oil removal processing, aeration sulfur removal, chemical oxidation sulfur removal, coagulation and flocculation processing, settlement, sterilization, double-medium filter filtering, fiber bundle filter filtering, ultrafiltration, and corrosion and scale inhibition. The invention also provides a corrosion and scale inhibition agent which comprises hydroxyethylidene diphosphonic acid, sodium sulfonate and benzotriazole. The gas production wastewater rejection processing technology is simple in flow, relatively low in operation cost and simple in management, and is capable of effectively processing sulfur acid containing gas field gas production wastewater, and discharged water reaches A3 standard in Recommended Index for the Injection Water Quality for Clastic Reservoir in People's Republic of China petroleum and Natural Gas Industry Standards SY / T5329 / 94.

Description

technical field [0001] The invention relates to a reinjection treatment process for gas production waste water from sulfuric acid gas fields. Background technique [0002] The shortage of water resources has long attracted the attention of the international community. More than 100 countries around the world are short of water, including China. my country's total water resources are considerable, ranking fourth in the world, but its per capita water resources rank 109th in the world. The country's annual sewage discharge is about 30 billion tons. Groundwater in major cities across the country is polluted to varying degrees. 54 of the country's 78 major rivers are polluted. my country's seven major water systems: the Yangtze River, the Pearl River, the Songhua River, the Yellow River, the Huai River, the Hai River, and the Liao River. Half of the seven major water systems are polluted, and 86% of urban rivers are polluted beyond the standard. More serious rivers and lakes ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/10
Inventor 王炜
Owner SHANGHAI EMPEROR OF CLEANING HI TECH
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