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Method for treating oil-field waste-water refilling by catalytic oxygenation-desorption deaerization UV sterilization

A technology for deoxygenated water tanks and oil fields, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc. It can solve the problems of high operating costs, large dosage of chemicals, and long process, and achieve low operating costs. , long service life and easy operation

Inactive Publication Date: 2006-10-25
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the dosage of medicament is large and the operating cost is high.
For the treatment of produced water in low-permeability oilfields, because low-permeability oilfields have stricter water quality requirements, usually only the use of fine filtration and membrane separation technology can meet the requirements, thus making the process longer
And because the fine filter is expensive, its life is short, and it needs to be cleaned repeatedly.

Method used

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  • Method for treating oil-field waste-water refilling by catalytic oxygenation-desorption deaerization UV sterilization
  • Method for treating oil-field waste-water refilling by catalytic oxygenation-desorption deaerization UV sterilization
  • Method for treating oil-field waste-water refilling by catalytic oxygenation-desorption deaerization UV sterilization

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The gas-water ratio condition experiment of oilfield wastewater

[0027] In the aeration catalytic filter (1500×1000×2000mm) and pressure catalytic filter tank (Φ1200×2800mm) of the catalytic reactor made of stainless steel, two porous partitions are placed in parallel, and the filling accounts for 35% of the volume of the catalytic reactor Manganese sand, the aeration and catalytic reaction time is 5min, the reaction temperature is 45°C, the catalytic reaction pressure is 0.3mPa, the oxidation reaction time is 3 minutes, the silver-loaded activated carbon deoxidation catalytic reaction temperature is 250°C, and the desorption deaerator inlet pump pressure is 3mPa , under the conditions of deoxygenated water reflux 50% and UV sterilization, the water quality of raw water after precipitation treatment is petroleum 11.2mg / l, volatile phenol 7.1mg / l, sulfide 8.4mg / l, SS 10.7mg / l and Fe 2+ 3.9mg / l, and the catalytic treatment of wastewater under different rati...

Embodiment 2

[0031] Embodiment 2: For the treatment time experiment of oilfield wastewater

[0032] In the aeration catalytic filter (1500×1000×2000mm) and pressure catalytic filter tank (Φ1200×2800mm) of the catalytic reactor made of stainless steel, two porous partitions are placed in parallel, and the filling accounts for 35% of the volume of the catalytic reactor manganese sand, the ratio of aeration gas to water is 1 / 1, the reaction temperature is 45°C, the catalytic reaction pressure is 0.3mPa, the oxidation reaction time is 3 minutes, the silver-loaded activated carbon deoxidation catalytic reaction temperature is 250°C, and the desorption deaerator inlet water pump pressure 3mPa, under the conditions of deoxygenated water reflux 50% and UV sterilization, the water quality of raw water after precipitation treatment is 11.2mg / l of petroleum, 7.1mg / l of volatile phenol, 8.4mg / l of sulfide, 10.7mg / l of SS and Fe 2+ 3.9mg / l, and the wastewater was treated under different aeration and ca...

Embodiment 3

[0036] Embodiment 3: the influence experiment of the polymer solution viscosity of sewage preparation

[0037] In the aeration catalytic filter (1500×1000×2000mm) and the pressure catalytic filter tank (Φ1200×2800mm) of the catalytic reactor made of stainless steel, two porous partitions are placed in parallel, and the filling accounts for 35% of the volume of the catalytic reactor. Manganese sand catalyst, at a reaction temperature of 45°C, a catalytic reaction pressure of 0.3mPa, an oxidation reaction time of 3 minutes, a silver-loaded activated carbon deoxidation catalytic reaction temperature of 250°C, a desorption deaerator inlet water pump pressure of 3mPa, and a deoxygenated water reflux of 50% Under the conditions of UV and UV sterilization, the water quality of raw water after precipitation treatment is 11.2 mg / l of petroleum, 7.1 mg / l of volatile phenol, 8.4 mg / l of sulfide, 10.7 mg / l of SS and 10.7 mg / l of Fe 2+ 3.9mg / l, the reaction treatment was carried out under ...

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Abstract

The invention provides a method for processing and recycling oil-field exploitation waste water, making air oxidation and catalytic oxidation on the waste water, making catalytic oxidation and air oxidation on volatile phenol, sulfide, Fe2+, etc, on more moderate reaction conditions, and modifying them; filtering out deposits, removing oxygen from the filtrate by low-temperature desorption and obtaining oxygen free water, and finally killing sulfate reducing bacterium, saprophyte and iron bacterium by UV sterilizing processing. And the test shows that it can process polymer-containing waste water in oil field to make the waste water directly reach water reinjection requirements, having low operating expenses.

Description

technical field [0001] The invention relates to the treatment and reinjection of oilfield wastewater produced in the process of underground oil exploitation. Specifically, it uses aeration catalytic oxidation-pressure catalytic filtration-desorption deoxygenation-UV sterilization technology to treat oily wastewater in oilfields, so that the treated wastewater The waste water meets the requirements of polymer reinjection, the method of increasing the viscosity of reinjection water and reducing the amount of polymer flooding. Background technique [0002] Oilfield production wastewater generated during underground oil extraction, the wastewater mainly contains petroleum and SS, in addition to volatile phenols, sulfides, dissolved oxygen, total Fe and Fe 2+ etc. and a large number of sulfate-reducing bacteria, saprophytic bacteria and iron bacteria. At present, many oilfields in China still use the old third stage (i.e. large tank oil collection-inclined tube settlement-filtra...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/32C02F1/64C02F1/74C02F103/10
Inventor 肖羽堂
Owner NANKAI UNIV
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