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Method for treating ASP flooding produced water by chlorine dioxide in combination with SSF (suspended sludge filtration) process

A technology of suspended sludge filtration and ternary compounding, which is applied in the direction of oxidized water/sewage treatment, filtration treatment, water/sludge/sewage treatment, etc. Eliminate problems such as rising effluent treatment costs, and achieve the effects of reducing treatment costs, reducing dosage, and reducing sludge production

Inactive Publication Date: 2018-05-18
HARBIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that a large amount of chemical agents will not only cause a significant increase in the cost of ternary produced water treatment, but also lead to an increase in the generation of scum in the system
The scum containing various chemical agents not only easily causes secondary pollution to the environment, but also the cost and difficulty of harmless treatment are relatively high

Method used

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  • Method for treating ASP flooding produced water by chlorine dioxide in combination with SSF (suspended sludge filtration) process
  • Method for treating ASP flooding produced water by chlorine dioxide in combination with SSF (suspended sludge filtration) process
  • Method for treating ASP flooding produced water by chlorine dioxide in combination with SSF (suspended sludge filtration) process

Examples

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specific Embodiment approach 1

[0043] A method for treating produced water from ASP flooding with chlorine dioxide combined with SSF suspended sludge filtration process, comprising the following steps:

[0044] Step 1. Aeration and settlement: aeration and settlement of the produced water from ASP flooding;

[0045] Step 2, chlorine dioxide pretreatment: pass the produced water of ASP flooding after aeration and settlement into chlorine dioxide for pretreatment;

[0046] Step 3. Degreasing: After adding degreasing agent to the produced water of ASP flooding after chlorine dioxide pretreatment, enter the two-way flow degreaser for degreasing, and add oil to the two-way flow degreaser during the deoiling process Viscosity reducer;

[0047] Step 4. Pressure boosting and buffering: boosting the pressure of the ASP flooding produced water after deoiling;

[0048] Step 5. Filtration of suspended sludge: Add flocculant to the produced water of ASP flooding after boosting pressure, and then enter the suspended sl...

specific Embodiment approach 2

[0066] A method for treating produced water from ASP flooding with chlorine dioxide combined with SSF suspended sludge filtration process, comprising the following steps:

[0067] Step 1. Aeration and settlement: aeration and settlement of the produced water from ASP flooding;

[0068] Step 2, chlorine dioxide pretreatment: pass the produced water of ASP flooding after aeration and settlement into chlorine dioxide for pretreatment;

[0069] Step 3. Degreasing: After adding degreasing agent to the produced water of ASP flooding after chlorine dioxide pretreatment, enter the two-way flow degreaser for degreasing, and add oil to the two-way flow degreaser during the deoiling process Viscosity reducer;

[0070] Step 4. Pressure boosting and buffering: boosting the pressure of the ASP flooding produced water after deoiling;

[0071] Step 5. Filtration of suspended sludge: add flocculant to the produced water of ASP flooding after boosting pressure, and then enter the suspended sl...

specific Embodiment approach 3

[0083] A method for treating produced water from ASP flooding with chlorine dioxide combined with SSF suspended sludge filtration process, comprising the following steps:

[0084] Step 1. Aeration and settlement: aeration and settlement of the produced water from ASP flooding;

[0085] Step 2, chlorine dioxide pretreatment: pass the produced water of ASP flooding after aeration and settlement into chlorine dioxide for pretreatment;

[0086] Step 3. Degreasing: After adding degreasing agent to the produced water of ASP flooding after chlorine dioxide pretreatment, enter the two-way flow degreaser for degreasing, and add oil to the two-way flow degreaser during the deoiling process Viscosity reducer;

[0087] Step 4. Pressure boosting and buffering: boosting the pressure of the ASP flooding produced water after deoiling;

[0088] Step 5. Filtration of suspended sludge: Add flocculant to the produced water of ASP flooding after boosting pressure, and then enter the suspended sl...

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Abstract

The invention discloses a method for treating ASP flooding produced water by chlorine dioxide in combination with an SSF (suspended sludge filtration) process, and belongs to the field of ASP floodingproduced water treatment. The method comprises the steps of aeration sedimentation, pretreatment with chlorine dioxide, oil removal, booster buffering, suspended sludge filtration, standard water recovery, backwash and the like. Two suspended sludge filters are selected to enable a double-filter-material filter layer to be matched with a suspended sludge layer, and the suspended sludge layer is used for enlarging the fine flocs in sewage through adsorption, electric neutralization and the like, so that the purpose of removing fine suspended solids is achieved. Therefore, the selected two suspended sludge filters can achieve the functions of adsorption, filtration and electric neutralization as well as a good net catching function. The method for treating ASP flooding produced water by chlorine dioxide in combination with the SSF process is developed by combining chlorine dioxide with a micro-flocculation suspended sludge filtration technology, the ASP flooding produced sewage treatment process is simplified, and production and operation costs are reduced.

Description

technical field [0001] The invention belongs to the field of produced water treatment of three-element compound flooding, and in particular relates to a method for treating produced water of three-element compound flooding through a chlorine dioxide combined with SSF suspended sludge filtration process. Background technique [0002] ASP flooding uses a mixture of polymers, surfactants and alkalis as the oil displacement carrier to reduce surface tension and expand the oil-water contact interface to achieve enhanced oil recovery. Compared with water flooding The recovery rate can be increased by more than 20%. At the same time, due to the large injection of polymers, surfactants and alkalis, the produced sewage has many characteristics different from those produced by water flooding, mainly reflected in the more complex components of the three-component produced sewage, the increase in viscosity, and the oil-water emulsification. Severe, strong emulsification stability of oi...

Claims

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Application Information

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IPC IPC(8): C02F9/08
CPCC02F1/001C02F1/281C02F1/40C02F1/5236C02F1/76C02F7/00C02F9/00
Inventor 李春颖李晓燕魏利李义奇
Owner HARBIN UNIV OF COMMERCE
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