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Processing technique for oil-contaminated water and equipment thereof

A technology for treating equipment and oily sewage, applied in water/sewage treatment, flotation water/sewage treatment, neutralized water/sewage treatment, etc. The effect of water pollution, low operating cost and easy operation

Inactive Publication Date: 2008-01-23
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water produced by ASP flooding contains alkali, polymers and surfactants, making water treatment more difficult
It can effectively treat the suspended matter in the sewage, but the various impurities still contained in the water cannot be completely purified in the primary treatment equipment.

Method used

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  • Processing technique for oil-contaminated water and equipment thereof
  • Processing technique for oil-contaminated water and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] It includes the following steps:

[0035] 1), carry out micro-electrolysis reaction to sewage, inject sulfuric acid into the sewage in the container, when the pH value of sewage reaches 4.0, stop injecting sulfuric acid, keep the reaction time of sewage in the container to be 45 minutes;

[0036] 2), carry out Fenton reaction to the sewage in the previous step, inject composite oxidant into the sewage in the container, the composite oxidant is hydrogen peroxide and potassium dichromate, the mass ratio of the two is 1000: 1, and the volume ratio of composite oxidant to sewage is 0.5 %, the reaction time is 210 minutes;

[0037] 3), then input the effluent from the previous step into the precipitator, inject sodium hydroxide solution into the precipitator, when the pH value of the water in the precipitator is adjusted to 7.5, stop injecting the sodium hydroxide solution, and settle for 2 hours;

[0038] 4) The water output from the settler is input into the clean water t...

Embodiment 2

[0040] It includes the following steps:

[0041] 1), carry out micro-electrolysis reaction to sewage, inject hydrochloric acid into the sewage in the container, when the pH value of sewage reaches 5.5, stop injecting hydrochloric acid, keep the reaction time of sewage in the container to be 50 minutes;

[0042] 2), carry out Fenton reaction to the sewage in the previous step, inject the composite oxidant into the sewage in the container, the composite oxidant is hydrogen peroxide and potassium dichromate, the mass ratio of the two is 1500: 1, and the volume ratio of the composite oxidant to sewage is 0.4 %, the reaction time is 165 minutes;

[0043] 3), then input the effluent from the previous step into the precipitator, inject calcium hydroxide solution into the precipitator, adjust the pH value of the water in the precipitator to 8, stop injecting the calcium hydroxide solution, and settle for 2 hours;

[0044] 4) The water output from the settler is input into the clean w...

Embodiment 3

[0046] It includes the following steps:

[0047] 1) Perform micro-electrolysis reaction on the sewage, inject sulfuric acid into the sewage in the container, stop injecting sulfuric acid when the pH value of the sewage reaches 4.0~7.0, and keep the reaction time of the sewage in the container for 55 minutes;

[0048] 2), carry out Fenton reaction to the sewage in the previous step, inject composite oxidant into the sewage in the container, composite oxidant is hydrogen peroxide and potassium dichromate, the mass ratio of the two is 2000: 1, composite oxidant and sewage volume ratio are 0.3 %, the reaction time is 120 minutes;

[0049] 3), then input the effluent from the previous step into the precipitator, inject calcium hydroxide solution into the precipitator, when the pH value of the water in the precipitator is adjusted to 8.5, stop injecting the calcium hydroxide solution, and settle for 2 hours;

[0050] 4) The water output from the settler is input into the clean water ...

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Abstract

The oily sewage disposal process and the equipment are provided, which relates to the oily sewage disposal equipment and the process in the oil field operation. The equipment comprises a processor chamber, an acidizing fluid tank, an oxidized fluid tank, a lye tank and a controller; wherein, the processor chamber is communicated by a micro-electrolysis reactor, an Fenton reactor and a sedimentator in turns; the acidizing fluid tank is connected with a water inlet; the micro-electrolysis reactor is filled with fillers in the middle; the oxidized fluid tank and the lye tank are correspondingly connected with the Fenton reactor and the sedimentator; valves are provided at the entrance and exit of each pipeline and each valve and a water pump are separately connected with the controller. The disposal process of the invention comprises the following steps: 1) micro-electrolysis reaction; 2) Fenton reaction; 3) sedimentation; 4) sedimentator effluent input clear water tank. The invention is an ideal choice for replacing the traditional nutshell filer with unamiable disposal effects and is characterized by small investment, long life, low operation cost and simple operation, which can effectively solve the difficulty of the oil field water pollution.

Description

technical field [0001] The invention relates to water treatment equipment and a treatment process thereof, in particular to a treatment equipment and a process for oily sewage in oilfield operations. Background technique [0002] In some oilfields, tertiary oil recovery has been carried out on a large scale, and the ASP flooding oil recovery process has reached the stage of industrial testing. The produced water of ASP flooding contains alkali, polymer and surfactant, which makes water treatment more difficult. During the oil pumping process, oil, water and water will be pumped back to the ground together. After the oil and water are separated, a small amount of oil is often mixed in the water. At the same time, the water also contains alkali, polymers, surfactants, etc. If it is discharged directly, it will seriously pollute the environment. Considering the full use of water resources, the water is generally recycled and continued to be injected into the well. However, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/52C02F1/66C02F1/72C02F1/461C02F1/24
Inventor 王永广
Owner YANGZHOU UNIV
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