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Forward osmosis membrane assembly, oil extraction wastewater treatment device and forward osmosis separation based advanced treatment recycling method of oil extraction wastewater

A technology of oil production wastewater and forward osmosis membrane, which is applied in the field of membrane separation, can solve the problems of reducing the viscosity of oil displacement agent, difficulty in effective reuse, complicated regeneration process, etc., and achieves the effect of less tendency of membrane fouling

Inactive Publication Date: 2017-07-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-volatile draw liquids such as sodium chloride and magnesium chloride have complex regeneration processes and are difficult to be effectively reused. They also reduce the viscosity of the oil-displacing agent, and a certain amount of alkali (such as magnesium ions) is often added to the oil-displacing agent. ), causing it to form a precipitate

Method used

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  • Forward osmosis membrane assembly, oil extraction wastewater treatment device and forward osmosis separation based advanced treatment recycling method of oil extraction wastewater
  • Forward osmosis membrane assembly, oil extraction wastewater treatment device and forward osmosis separation based advanced treatment recycling method of oil extraction wastewater
  • Forward osmosis membrane assembly, oil extraction wastewater treatment device and forward osmosis separation based advanced treatment recycling method of oil extraction wastewater

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Embodiment 1

[0081] The advanced treatment and reuse method of oil production wastewater based on forward osmosis separation in this embodiment includes the following steps:

[0082] This embodiment is applicable to polymer flooding oil production wastewater, the amount of treated water is 50 tons / day, the amount of reused water is 25 tons / day, and the production of polymer oil displacement agent is 40 tons / day.

[0083] (1) Forward osmosis process: the water in the oil production wastewater (selected from the polymer flooding oil production wastewater in Daqing Oilfield) flows into the draw liquid flow channel driven by the osmotic pressure difference, and the water flux is 20LMH, so that the draw liquid in the draw liquid flow channel If it is diluted, it is the diluted drawing solution; due to the volume reduction of the water in the oil production wastewater flow channel, the oil production wastewater is concentrated, and the concentration ratio is 2-5 times, which is the concentrated o...

Embodiment 2

[0099] This embodiment is applicable to the waste water from oil recovery of the ASP flooding, the treated water volume is 500 tons / day, the recycled water volume is 250 tons / day, and the ASP flooding agent is produced 350 tons / day.

[0100] The advanced treatment and reuse method of oil production wastewater based on forward osmosis separation in this embodiment includes the following steps:

[0101] This embodiment is applicable to the waste water from oil production of ASP flooding, the water volume for treatment is 500 tons / day, the water consumption for reuse is 250 tons / day, and the production volume of ASP flooding agent is 350 tons / day.

[0102] (1) Forward osmosis process: the water in the oil production wastewater (the ASP flooding wastewater in Daqing Oilfield is selected) flows into the draw liquid flow channel driven by the osmotic pressure difference, and the water flux is 20LMH, so that the water in the draw liquid flow channel The dilute drawing solution is the...

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Abstract

The invention provides a forward osmosis membrane assembly, an oil extraction wastewater treatment device and a forward osmosis separation based advanced treatment recycling method of oil extraction wastewater. The advanced treatment recycling method of the oil extraction wastewater comprises the following steps of a forward osmosis process, an oil extraction wastewater circulation process, a draw solution circulation process, and a draw solution utilization process, wherein osmotic pressure is adopted as drive force and additional power is not needed in the forward osmosis process, pretreated oil extraction wastewater is taken as raw material, draw solution powder is taken as a draw solution, a water resource is recovered through the forward osmosis process and the draw solution is diluted for preparing an oil-displacing agent. The draw solution is used for preparing the oil-displacing agent, so that a lot of fresh water required for preparing the oil-displacing agent is saved and the draw solution is effectively recycled after circulation. In addition, the invention further provides a forward osmosis separation method based advanced treatment recycling technology of oil extraction wastewater, which is energy-saving, low in pollution tendency and higher in sustainability.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a forward osmosis membrane module, an oil production wastewater treatment device and a method for advanced treatment and reuse of oil production wastewater based on forward osmosis separation. Background technique [0002] With the rapid development of my country's industry, the demand for oil has risen sharply. With the progress of primary oil recovery and secondary oil recovery, many oil fields in my country have entered the middle and late stages of oil development. In order to ensure a certain recovery efficiency, tertiary oil recovery technologies such as polymer flooding and ASP flooding have been widely used. The tertiary oil recovery wastewater has the characteristics of large oil content, more polymers, more suspended solids, and a certain degree of salinity, which will cause greater difficulties in its treatment. [0003] In order to solve the p...

Claims

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Application Information

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IPC IPC(8): B01D63/00B01D61/00C02F1/40C02F1/44C02F103/10
CPCB01D61/002B01D63/00C02F1/40C02F1/445C02F2103/10
Inventor 于水利杨望臻龚超郭婧轩
Owner TONGJI UNIV