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Advanced treatment process for gas field produced water

A gas field produced water, advanced treatment technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Foam and other problems, to achieve the effect of small footprint, reduced foaming tendency, and reduced odor

Active Publication Date: 2014-02-26
四川光隆环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide an advanced treatment process for gas field produced water, which solves the problems that the existing wastewater treatment process cannot control foam well, remove calcium and magnesium ions, desalinate and reduce COD, discharge treatment up to standard, and cannot realize resource utilization.

Method used

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  • Advanced treatment process for gas field produced water
  • Advanced treatment process for gas field produced water

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Embodiment

[0033] The advanced treatment process of gas field produced water includes the following steps:

[0034] Foam separation process: The produced water is passed into the foam separator, and air is introduced into the water through the ejector and the aerator, so that the produced water and the micro-bubbles are fully mixed. The surface tension of the interface and electrostatic adsorption can separate the foaming substances, residues and suspended substances in the water from the adhesion in the water, so as to achieve the purpose of separating the foam substances and controlling the water quality, so as to obtain the clear liquid. Among them, the gas flow rate is 9 ~ 200m 3 / h, pressure 0.05MPa. The operating parameters of the above-mentioned foam separator are: flow rate 4m 3 / h, jet pump power: 0.55KW, gas-liquid ratio: (30-90):1. The indicators of the produced water after treatment by the foam separator are shown in Table 1:

[0035]

[0036] It can be seen from Table...

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Abstract

The invention discloses an advanced treatment process for gas field produced water, which solves the problem that in existing wastewater treatment processes, foam cannot be well controlled, calcium and magnesium ions cannot be well removed, and resources cannot be utilized. The process comprises the following treatment processes: a foam separating process; an absorption-coagulation integrated process; a two-effect evaporation process; a catalytic oxidation treatment process; and an SBR (Sequencing Batch Reactor) biochemical treatment. Through the treatment process, existing produced water with high content of slat and organic matters reaches the standards, and the treatment process disclosed by the invention is reasonable in flow, compact in equipment installation, small in occupied area and can be conveniently used together with other processes. In addition, the treatment process is low in investment expense, low in operating cost and low in comprehensive energy consumption, and the environment-friendly and social benefits are remarkably superior to those of other technical schemes.

Description

technical field [0001] The invention relates to a process for advanced treatment of gas field produced water. Background technique [0002] The Puguang Gas Field has two produced water treatment stations, Zhaojiaba and D403, and three reinjection wells, with a designed treatment capacity of 950 cubic meters per day, all of which adopt the gas extraction-desulfurization-purification-filtration treatment process to meet the standard reinjection. [0003] At present, the average daily water production of Puguang Gas Field is about 700-800 cubic meters, which is close to the design processing capacity of reinjection and has exceeded the designed injection volume. [0004] The contradiction between water production and re-injection capacity is gradually intensifying, and it is necessary to increase re-injection wells and supporting re-injection facilities; or adopt other treatment schemes to discharge and reuse up to the standard, and it is necessary to reduce the amount of re-in...

Claims

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Application Information

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IPC IPC(8): C02F9/14
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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