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Preservation method of ultrafiltration membrane

A preservation method, ultrafiltration membrane technology, applied in ultrafiltration, chemical instruments and methods, membrane technology, etc., can solve the problems of increasing storage and transportation costs, easy breeding of mold, algae and bacteria, leakage of moisturizing fluid, etc., and meet the requirements of reduction and storage costs

Inactive Publication Date: 2013-12-25
SHENZHEN CHENGDELAI IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the weight of the ultrafiltration membrane treated by this method will increase to a large extent, which will increase the difficulty of transportation and increase the cost of storage and transportation, and also bear a certain risk of leakage of moisturizing liquid
At the same time, this preservation method needs to add antifreeze ingredients, otherwise it is easy to freeze in an environment with a temperature below 0°C, causing the ultrafiltration membrane to lose its filtering effect
Moreover, during the storage process, the UF membranes stored in a wet state contain moisture and nutrients, which are easy to breed mold, algae and bacteria. If no anti-mold and antibacterial agents are added, long-term storage will cause the UF membranes to rot , if anti-mold and antibacterial agents are added, the cost of storage and transportation will be further increased

Method used

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  • Preservation method of ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation concentration is the sodium citrate solution standby of 4.76wt%;

[0038] Soak the ultrafiltration membrane in the above-mentioned sodium citrate solution for 2 hours, the ambient temperature is 25°C, and the ambient relative humidity is 60%;

[0039] After the soaking treatment, take out the ultrafiltration membrane and dry it in the air. The ambient temperature for drying is 25°C and the relative humidity of the environment is 60%;

[0040] After drying, store the ultrafiltration membrane at an ambient temperature of 25°C and an ambient relative humidity of 50%.

[0041] After long-term storage, the surface of the ultrafiltration membrane has no abnormal changes, and the membrane filaments have no mold, algae, odor, etc. decay.

[0042] According to the method described above, the water flux test was carried out on the ultrafiltration membrane treated by this method. The test results show that the average water flux of a single membrane filament is 501LMH ...

Embodiment 2

[0044] Refer to Example 1 for the actual operation, and refer to Table 1 for the detailed parameters. Table 1 is the specific implementation parameters of the ultrafiltration membrane preservation method provided by Examples 1 and 2 of the present invention. It can be seen from Table 1 that after long-term storage, the average water flux of a single membrane filament of the ultrafiltration membrane is 488LMH (liter / square meter / hour), and the water flux recovery rate is 85.6%, indicating that the ultrafiltration membrane has been effectively Keep it moisturised.

[0045] The concrete implementation parameter of the preservation method of the ultrafiltration membrane that table 1 embodiment of the present invention 1 and 2 provides

[0046]

[0047] As can be seen from the above examples, the average water flux of a single membrane filament of the ultrafiltration membrane treated by the present invention can reach 501LMH (liter / square meter / hour), and the water flux recovery...

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Abstract

The invention provides a preservation method of an ultrafiltration membrane, which comprises the following steps: immersing an ultrafiltration membrane in a reagent solution for 0.5-8 hours, wherein the reagent is one or more of calcium chloride, sodium chloride, magnesium chloride, anhydrous sodium sulfate, anhydrous magnesium sulfate, sodium citrate, sodium malate and sodium lactate, and the concentration of the reagent solution is 1-40 wt%; and airing the immersed ultrafiltration membrane at the ambient temperature of 5-40 DEG C, and preserving. The selected reagent has the actions of a humectant, and the ultrafiltration membrane is immersed and aired to obtain the dry-state ultrafiltration membrane, thereby avoiding various problems caused by wet-state preservation of the ultrafiltration membrane on the premise of not influencing the original properties of the ultrafiltration membrane or maximally reducing the influence on the properties; and therefore, the ultrafiltration membrane treated by the method provided by the invention can be preserved for a long time without molding, reeking or producing any other corrosion phenomenon, thereby greatly lowering the requirements for storage and transportation conditions and the cost for storage and transportation.

Description

technical field [0001] The invention relates to the technical field of ultrafiltration membrane production, in particular to a preservation method for ultrafiltration membranes. Background technique [0002] Ultrafiltration membrane is a sieving filter medium that works by pressure difference. The membrane pore size is 1nm~50nm, which is between microfiltration membrane and nanofiltration membrane. It can mainly separate, concentrate and purify biological products, pharmaceutical products and The role of food, etc., can also be used in blood treatment, wastewater treatment and ultrapure water preparation and other aspects. According to different membrane materials, ultrafiltration membranes can be divided into inorganic membranes and organic membranes. Among them, inorganic membranes mainly include ceramic membranes and metal membranes; organic membranes are mainly made of polymer materials such as polysulfone, polyethersulfone, polyvinyl chloride, poly Made of vinylidene f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/20B01D65/00B01D65/02
Inventor 边文兵黄磊欧阳葵会
Owner SHENZHEN CHENGDELAI IND CO LTD
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