Curtain type hollow fiber membrane yarn end fastening technique
A fixed and reinforced fiber membrane technology, which is 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: 2008-12-10
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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[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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The invention provides a technical method for strengthening the mechanical strength of the end of the membrane filament, so as to effectively improve the local mechanical strength of the membrane filament of the original membrane module and effectively avoid the problem of broken filaments of the membrane module. A high-molecular organic material with strong corrosion resistance is applied to the membrane filaments at the top and bottom of the hollow fiber membrane module to increase the mechanical strength of the local membrane filaments. It is characterized in that: the end fixing and strengthening technology of the curtain type hollow fiber membrane module is to strengthen the membrane filament at the fixed end of the curtain type membrane module, and the coating position of the polymer organic material is within 10-40CM of the membrane filament from the cementing end , can be monofilament smearing, partial bonding smearing, or overall smearing. The polymeric organic materials used for smearing are silica gel with good adhesion to hard glue, epoxy resin with special formula that does not harden, neoprene, TTR glue (thermoplastic rubber), 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 And other advantages, increasingly being paid attention to worldwide [Tom Stephenson, Simon Judd, Bruce Jefferson, Keith Brindle, Membrane Bioreaators for wastewater Treatment], 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, ...
Claims
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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