Curtain type hollow fiber membrane yarn end fastening technique

A fixed and reinforced fiber membrane technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as broken wires, affecting the stable operation of membrane bioreactors and meeting water standards, so as to reduce the problem of broken wires Effect

Inactive Publication Date: 2007-05-16
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

However, in practical applications, long-term large-scale aeration and scouring operation will cause the membrane filaments of the curtain hollow fiber membrane module to be cemented and rooted beyond the fatigue strength and the filaments will be broken.
In addition, under aeration and scouring, the membrane filaments vibrate continuously with the cemented root as the fulcrum, resulting in shearing of the membrane filaments and resulting in broken filaments
Broken filaments mainly occur at the end of the membrane filaments of the module, which seriously affects the stable operation of the membrane bioreactor and the water reaching the standard.

Method used

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  • Curtain type hollow fiber membrane yarn end fastening technique

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Embodiment Construction

[0007] Contains COD 200~500mg / L, BOD 5 100~300mg / L, ammonia nitrogen 50~160mg / L, SS 20~50mg / L, water 10-15m 3 / h of domestic sewage enters the membrane bioreactor for treatment, and the system uses the end fixing and strengthening technology of the present invention to domestically produced curtain-type hollow fiber membrane modules with low mechanical strength. When the air-water ratio is 10-30, the blowing volume is 5m 3 / hr, temperature 12~29℃, pH 6.5~8.0, stable operation for 6 months, the flux of this hollow fiber membrane module is stable at 10-15L / m 2 ·h. The operating pressure is 16-20kpa. Compared with untreated modules, the problem of broken wires in membrane modules has been effectively controlled. The COD value of the system effluent varies between 10 and 30mg / L, and is generally stable below 20mg / L. 5 The value fluctuates between 1 and 3mg / L, the ammonia nitrogen is stable below 10mg / L, the SS is stable below 0.3mg / L, and the effluent water quality meets the "...

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Abstract

The invention relates to a method for improving the mechanical strength of end of film filament, wherein it uses corrosion-resistant macromolecule organic material to coat the top and bottom filament of hollow fiber film. And the invention is characterized in that: the it coast she filament at 10-40cm from the adhesive end, as local coat or integrated coat. And the organic material can be silica gel, epoxy resin, etc.

Description

technical field [0001] The invention belongs to the technical field of membrane separation applications, and in particular relates to a technology for fixing and strengthening the ends of curtain-type hollow fiber membranes. Background technique [0002] Membrane bioreactor is a sewage treatment technology that combines membrane separation technology and biological sewage treatment technology. Compared with traditional biological sewage treatment technology, it has a small footprint, centralized equipment, modularization, and has the potential for upgrading It has been paid more and more attention worldwide [Tom Stephenson, Simon Judd, Bruce Jefferson, Keith Brindle, Membrane Bioreaators for wastewater Treatment[M], p13], and is considered to be one of the most promising sewage treatment and reuse technologies. [0003] Hollow fiber curtain membrane is a form of membrane module made of hollow fiber membranes. Hollow fiber membrane modules have been widely used in MF, UF, GP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/00B01D69/08
Inventor 樊耀波董春松李刚
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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