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Cleaning agent for ceramic membrane for oilfield produced water and cleaning method thereof

A technology for extracting water and cleaning agents, which is applied in the field of low-temperature cleaning agents for ceramic membranes. It can solve the problems of short effective operation time of membranes, lack of practical application value, and low recovery rate of membrane flux, and achieve fast and efficient permeation flux, cleaning The effect of shortening the time and reducing energy consumption

Inactive Publication Date: 2012-10-10
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The above-mentioned cleaning of ceramic membranes for oilfield produced water is basically limited to indoor research, and there is no effective cleaning formula, and these cleaning methods require high cleaning temperature and time-consuming, but the membrane flux recovery rate after cleaning is low, and the membrane is effective. Short running time and lack of practical application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Cleaning step one:

[0069] A component weight percentage sodium hydroxide 2% Sodium alkylbenzene sulfonate 0.2% The rest is oilfield produced water after ceramic membrane treatment

[0070] Preparation of component A: In a stainless steel cleaning tank with stirring, add the above-mentioned components according to the formula in the above table, and stir for 5 minutes to obtain component A of the cleaning agent;

[0071] Cleaning: Heat component A of the cleaning agent to 40°C, and after 40 minutes of no-penetration cleaning, stop cleaning and empty;

[0072] Cleaning step two:

[0073] B component weight percentage sodium hydroxide 1.5% Sodium alkylbenzene sulfonate 0.3% EDTA Sodium Salt 0.4% Triethanolamine 0.2% sodium tripolyphosphate 0.1% The rest is oilfield produced water after ceramic membrane treatment

[0074] Preparation of component B: In a stainless steel cleaning tan...

Embodiment 2

[0083] Other steps are identical with embodiment 1, just the composition content of each component of cleaning agent changes, wherein

[0084] A component weight percentage sodium hydroxide 1% Sodium alkylbenzene sulfonate 0.1% The rest is produced water after ceramic membrane treatment

[0085] B component weight percentage sodium hydroxide 0.8% Sodium alkylbenzene sulfonate 0.1% EDTA Sodium Salt 0.2% Triethanolamine 0.1% sodium tripolyphosphate 0.05% The rest is produced water after ceramic membrane treatment

[0086] C component weight percentage sodium hydroxide 0.2% hydrogen peroxide 0.4% The rest is produced water after ceramic membrane treatment

Embodiment 3

[0088] Other steps are identical with embodiment 1, just the composition content of each component of cleaning agent changes, wherein

[0089] A component weight percentage sodium hydroxide 0.5% Sodium alkylbenzene sulfonate 0.08% The rest is tap water

[0090] B component weight percentage sodium hydroxide 0.5% Sodium alkylbenzene sulfonate 0.08% EDTA Sodium Salt 0.15% Triethanolamine 0.08% sodium tripolyphosphate 0.1% The rest is tap water

[0091] C component weight percentage sodium hydroxide 0.1% Sodium alkylbenzene sulfonate 0.3% hydrogen peroxide 0.8% The rest is tap water

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Abstract

The invention discloses a cleaning agent for a ceramic membrane for oilfield produced water, and overcomes the deficiency that the ceramic membrane for the oilfield produced water does not have an effective cleaning method and an effective cleaning formula. The cleaning agent comprises a component A, a component B and a component C, wherein effective constituents of the component A are sodium hydroxide and sodium alkyl benzene sulfonate; effective constituents of the component B are sodium hydroxide, sodium alkyl benzene sulfonate, ethylene diamine tetraacetic acid sodium salt, triethanol amine and sodium tripolyphosphate; and effective constituents of the component C are sodium hydroxide, sodium alkyl benzene sulfonate and hydrogen peroxide. The cleaning agent aiming at characteristics of the oilfield produced water has the advantages that dirt on the surface of the membrane and in membrane holes can be removed rapidly and efficiently, the cleaning frequency of the membrane is reduced, the cleaning temperature and the cleaning time are greatly reduced, the permeation flux of the ceramic membrane is recovered rapidly and efficiently, and the regeneration of a system is accelerated.

Description

technical field [0001] The invention relates to a cleaning agent and a cleaning method for ceramic membranes, in particular to a low-temperature cleaning agent for ceramic membranes used to treat oilfield produced water. Background technique [0002] Some oilfields in my country are in the middle and late stages of development, a large amount of produced sewage needs to be treated, and the composition of the produced water is complex and changeable, often containing a large amount of emulsified oil or hydrocarbons, soluble organic matter, solid particles, inorganic ions, bacteria, etc. It is difficult to separate them by physical or chemical methods, and it is difficult to meet the requirements of discharge water quality and reinjection water. In addition, with the increase in the complexity of oil reservoir development, the reinjection sewage obtained by the traditional chemical flocculant method and physical filtration method also faces the difficulty of increasing treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06
Inventor 黄有泉刘松林杨淑琴武云龙付馨
Owner PETROCHINA CO LTD
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