Regeneration method of performance of immersion-type ultrafiltration membrane used in reclaimed water recycling

A submerged, ultrafiltration membrane technology, applied in the direction of ultrafiltration, chemical instruments and methods, membrane technology, etc., can solve the problems of not meeting the water consumption requirements, water flux reduction, pressure difference increase, etc., to prolong the service life , recovery performance, and the effect of ensuring water volume

Active Publication Date: 2013-04-24
SHANXI TAIGANG STAINLESS STEEL CO LTD
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AI Technical Summary

Problems solved by technology

When submerged ultrafiltration treats reclaimed water, there are residual or newly polluted fine particulate matter in the water, as well as colloids, organic matter and microorganisms, etc., and the ultrafiltration membrane is intercepted and filtered out by the membrane wire after it has been in operation for a period of time or after a certain amount of se

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The reclaimed water advanced treatment station of Taiyuan Iron and Steel Energy Power Plant uses reclaimed water as the water source, and adopts double membrane method for deep desalination. The water produced reaches the standard of desalinated water, and the conductivity is below 70 us / cm. It is used as high-quality stainless steel for the production of stainless steel. water. In this technology, the ultrafiltration adopts CS submerged ultrafiltration from Memcor, Australia. The membrane filament is a hollow fiber membrane. The ultrafiltration membrane pool adopts a concrete structure. It has the characteristics of low cost, corrosion resistance, solidity and non-deformation. After being put into operation in 2009, after years of practice, a method suitable for the performance regeneration of the submerged ultrafiltration membrane in the reuse of water was found.

[0063] After the membrane has been running for 30 minutes, the measured permeable pressure difference is 20...

Embodiment 2

[0068] Method of performance regeneration of submerged ultrafiltration membrane in reclaimed water reuse:

[0069] During the operation of the membrane, when the operation time is 20 minutes, when the transmembrane pressure difference suddenly reaches 25 kPa, the physical regeneration method is directly adopted, and the specific implementation method is the same as in Example 1.

Embodiment 3

[0071] Method of performance regeneration of submerged ultrafiltration membrane in reclaimed water reuse:

[0072] During the operation of the membrane, the running time is 85 hours and the transmembrane pressure difference suddenly reaches 80 kPa, and the short-period and short-time chemical cleaning method is directly adopted. The specific implementation method is the same as that in Example 1.

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Abstract

The invention relates to a regeneration method of the performance of an immersion-type ultrafiltration membrane used in reclaimed water recycling. According to the invention, aiming at pollution form and pollutant of immersion-type membrane in reclaimed water deep process, a membrane function regeneration method which is a combination of physical method and various chemical methods is determined. The method mainly comprises gas and water backwashing, scrubbing, and chemical washing methods with different periods and different times. Therefore, ultrafiltration membrane function is restoratively regenerated, and production water amount requirement is satisfied. The method can be implemented frequently and regularly, and greatly assists in productions. The regeneration effect is good, and the method is simple and feasible. The method is suitable to be popularized in water processing industries.

Description

Technical field [0001] The invention relates to a method for regenerating the performance of a submerged ultrafiltration membrane in reclaimed water reuse, which belongs to the technical field of sewage reuse filtration. Background technique [0002] At present, in the sewage desalination technology, the double membrane method, namely ultrafiltration + reverse osmosis technology, is widely used. Among them, there are many types of ultrafiltration membranes, which can be divided into pressure type and submerged type according to different manufacturing methods. The advantages of submerged ultrafiltration are strong anti-pollution ability, good pollution holding capacity, energy saving, and high level of automation. [0003] The role of the ultrafiltration system is to remove suspended solids in the water, including impurities such as colloids and bacteria, and provide qualified influent for reverse osmosis to ensure that the turbidity of the reverse osmosis influent is less than 0.2...

Claims

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Application Information

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IPC IPC(8): B01D65/06B01D61/14C02F1/44
Inventor 武彦琴王瑞红
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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