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Hollow fiber membrane contactor and application thereof

A technology of fiber membrane contactor and membrane contactor, applied in the direction of membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as difficult operation, uneven distribution of shell side, low filling rate of membrane filaments, etc., to achieve Structural optimization, enhanced mass transfer effect, effect of maintaining filling rate and contact area

Active Publication Date: 2018-04-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are researchers who wind, bend, fix through the net, and weave the membrane filaments to enhance the mass transfer process [Liu Liying, Li Lijun, Ding Zhongwei, Ma Runyu, Winding Hollow Fiber Membrane Modules Strengthen the Mass Transfer Process on Both Sides of the Membrane, Membrane Science and Technology, 2005, Vol. 25, No. 6, 17-20], [Xing Yang, Rong Wang, Anthony G.Fane. Novel designs for improving the performance of hollow fiber membrane distillation modules, Journal of Membrane Science 384(2011) 52–62], [Chinese Patent CN201320421198.1], but these methods are not easy to operate, the filling rate of membrane filaments is low (generally only below 30%), and the distribution of the shell side is still uneven. The filling area and process of the membrane contactor The mass transfer effect still needs to be improved

Method used

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  • Hollow fiber membrane contactor and application thereof
  • Hollow fiber membrane contactor and application thereof
  • Hollow fiber membrane contactor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] CO in biogas using polypropylene (PP) hollow fiber membrane contactor 2 to absorb. The specifications of the membrane filaments used are as follows: inner diameter 0.3mm, outer diameter 0.5mm, average pore diameter 0.2μm; the specific parameters of the module are as follows: the inner diameter of the module is 25.0mm, the length is 500mm, the packing density is 54%, and the effective membrane area is 1.06m 2 ; Among them, the membrane filament adopts two configurations: braided (braided membrane filament is divided into 3 strands, 1 strand for each strand, and the braiding angle is 30°) and unwoven (ie, traditional straight type). Biogas composition is 60% CH 4 +40%CO 2 , the absorbent is pure water, the flow rates are 1000mL / min and 2000mL / min respectively, the operating pressure is 0.8MPa, the gas goes through the tube side, and the pure water goes through the shell side. CO in product gas 2 The concentration was determined by gas chromatography, and the specific ...

Embodiment 2

[0030] Membrane distillation was performed using polytetrafluoroethylene (PTFE) hollow fiber membrane contactors. The specifications of the membrane used are as follows: inner diameter 0.8mm, outer diameter 1.6mm, average pore diameter 0.3μm; module specific parameters are as follows: module inner diameter 70.0mm, length 300mm, packing density 45%, effective membrane area 1.30m 2 ; Among them, the membrane silk adopts two configurations: braided (braided membrane silk is divided into 4 strands, 2 strands per share, and the braiding angle is 45°) and unwoven (ie, traditional straight type). The raw water is tap water, going through the shell side, the flow rate is 50L / h, the conductivity is 806μs / cm, the operating temperature is 70°C, the tube side is vacuumed, and the vacuum degree is -0.09MPa. The conductivity of the produced water was measured with a conductivity meter, and the specific results are shown in Table 2.

[0031] It can be seen that the braiding of the membrane ...

Embodiment 3

[0035] Ammonia nitrogen wastewater treatment process using polytetrafluoroethylene (PTFE) hollow fiber membrane contactor. The specifications of the membrane filaments used are as follows: inner diameter 0.5mm, outer diameter 1.0mm, average pore diameter 0.4μm; module specific parameters are as follows: module inner diameter 40.0mm, length 500mm, packing density 50%, effective membrane area 1.26m 2 ; Among them, the membrane filament adopts two configurations: braided (braided membrane filament is divided into 3 strands, 3 strands per strand, and the braiding angle is 40°) and unwoven (ie, traditional straight type). The wastewater with an ammonia nitrogen content of 2000ppm goes through the shell side with a flow rate of 6L / h, and the 10% sulfuric acid solution goes through the tube side with a flow rate of 3L / h. The specific test results are shown in Table 3.

[0036] It can be seen that whether the membrane yarn is woven or not has a very significant impact on the treatment...

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Abstract

The invention relates to a hollow fiber membrane contactor and an application thereof. The hollow fiber membrane contactor comprises hollow fiber membrane filaments which are specifically braided andfill a shell of an assembly to form a membrane contactor, wherein the hollow fiber membrane filaments in the membrane contactor are significantly improved in distribution uniformity through braiding;the adverse effects like channeling, short circuit and dead zone of a shell pass fluid are eliminated; a significant reinforcing effect can be exerted on the mass transfer effect of the membrane contactor; meanwhile, the filling rate of membrane filaments, i.e., the contact area of the membrane contactor can not be reduced. The hollow fiber membrane contactor provided by the invention can be applied to the processes of gas absorption, absorbent regeneration, membrane distillation, ammonia nitrogen wastewater treatment, etc.

Description

technical field [0001] The invention relates to a hollow fiber membrane contactor and its application. Background technique [0002] Membrane contactor is a new technology developed in recent years. It is a process used to realize gas-liquid two-phase mass transfer without direct contact. Compared with the traditional contact system, the membrane contactor has many advantages, such as large mass transfer area, compact structure, small footprint, less restrictions on operating conditions, no mist entrainment, liquid flooding, foam and other problems, so in membrane distillation , industrial wastewater treatment, gas absorption, emulsification and other fields have received widespread attention [E.Drioli, A.Criscuoli, E.Curcio, MembraneContactors: Fundamentals, Applications and Potentialities, vol.11, Elsevier, December 2005]. [0003] Most of the hollow fiber membrane contactors currently used are flat modules, that is, the bundled hollow fiber membrane filaments are arrange...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/02B01D61/36B01D53/18C02F1/44C02F101/16
CPCB01D53/18B01D61/364B01D61/366B01D63/027B01D2257/504B01D2258/05C02F1/44C02F2101/16
Inventor 康国栋曹义鸣李萌刘丹丹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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