CN1509801A

CN1509801A - Immersing hollow fibre membrane assembly

Info

Publication number: CN1509801A
Application number: CNA021587116A
Authority: CN
Inventors: 吕晓龙
Original assignee: Membrane Science & Technology Inst Tianjin Polytechnic Univ
Current assignee: Membrane Science & Technology Inst Tianjin Polytechnic Univ
Priority date: 2002-12-26
Filing date: 2002-12-26
Publication date: 2004-07-07

Abstract

A unit-type external-pressure hollow fibre membrane module with water collecting and air distributing function for the biological membrane reactor is composed of unit frame and multiple single membrane modules. Said single membrane module consists of upper and lower ends and the external-pressure hollow fibre membrane between them. Multiple membrane modules are parallelly connected to become a row and multiple rows of membrane modules are contained in a frame. Its advnatages are high water output, strength and resistance to pollution, and low energy consumption.

Description

The immersion hollow fiber film assembly

Technical field

The present invention relates to a kind of external pressure immersion hollow fiber film assembly, relate in particular to a kind of immersion hollow fiber film assembly and unit membrane assembly that can be used for membrane bioreactor.

Background technology

Membrane bioreactor (Membrane Bioreactor, MBR) product that to be traditional activated sludge process combine with emerging membrane separation technique, it utilizes membrane separation assemblies to replace the second pond in the traditional handicraft, not only can reduce floor space greatly, also significantly improved the efficient of Separation of Solid and Liquid, make effluent quality be improved significantly.

The applicant's utility model patent CN2491096Y discloses a kind of external pressure hollow fiber film assembly, it comprises sleeve pipe and upper end, bottom and filling external pressure hollow-fibre membrane within it, the wherein hollow-fibre membrane perforate at top casting end place, cast the down hollow-fibre membrane closed pore at end place, and on the following casting end a plurality of pod apertures are arranged, and near the place, inboard of downside mouth catch is installed at following casting end, in the upside mouth corresponding position of top casting end back-up ring is installed.When the film mask work, feed liquid enters in the casing cavity by pod apertures from the lower port of membrane module, and after the centrifugation of tunica fibrosa, filtered solution flows out from upper port, and concentrate is discharged from the upside mouth.When needs on-line cleaning membrane module, side is squeezed into compressed air by lower port, with the tunica fibrosa in the concussion rinsing membrane module sleeve pipe 2, washes back liquid and discharges from the downside mouth.

This design can be when film mask work and on-line cleaning membrane module, and the diaphragm fiber improves cleaning performance, and then strengthens the film separation efficiency, is applicable to the serialization industrial production.

But this membrane module also exists following deficiency: be unsuitable for especially being unsuitable for as immersion membrane bioreactor as the immersed membranes assembly.Therefore, further improved necessity is arranged.

Summary of the invention

The objective of the invention is at the deficiencies in the prior art, a kind of modular immersion hollow fiber film assembly is provided, be particularly useful for the immersion hollow fiber film assembly and the unit membrane assembly of membrane bioreactor.

Modular external pressure hollow fiber film assembly provided by the invention comprises the single membrane module of framework and Duo Zhi, it is characterized in that: single membrane module comprises upper and lower end and is filled in therebetween external pressure hollow-fibre membrane that single fiber film component is not provided with sleeve pipe; A plurality of membrane module upper port are carried out parallel connection by collector pipe, lower port by sudden and violent tracheae and are constituted a row; Many row's membrane modules are contained in the framework.

Unit membrane assembly provided by the invention has modular characteristics, has to catchment and the gas distribution dual-use function.This unit membrane assembly had both had the high yield water yield, high strength and anti-fouling performance, can effectively cut down the consumption of energy again, and be easy to transportation and construction and installation, satisfied the needs of film-bioreactor industrialization.

Description of drawings

Fig. 1 demonstrates the formation of a membrane module of the present invention and the schematic diagram that top casting end tunica fibrosa constitutes;

Fig. 2 shows that the pipeline configuration of a membrane module constitutes schematic diagram;

Fig. 3 shows the sudden and violent gas cell distribution structural representation of end face of casting end;

Fig. 4 shows that many membrane modules constitute a row connection diagram;

Fig. 5 shows unit membrane modular construction schematic diagram of the present invention.

The specific embodiment

As shown in Figure 1 and Figure 2, list of the present invention props up the structure that membrane module constitutes does not have tubular quill housing, and it comprises upper end 2, bottom 3, external pressure hollow-fibre membrane 1.Such membrane module is suitable under water the use.The hollow-fibre membrane perforate at its top casting end place can go out filtered solution, the hollow-fibre membrane closed pore at following casting end place, and on the casting end a plurality of pod apertures are arranged down.The casting end can be circle or rectangle.Casting end as shown in the figure is circular, and its a plurality of pod apertures are that circumferential evenly distributes; When the casting end was rectangle, a plurality of pod apertures were that rectangle evenly distributes.

The doughnut membrane material can be known hollow-fibre membranes such as Kynoar, polyethylene, polypropylene, polyether sulfone.The root tunica fibrosa that Fig. 1 demonstrates the top casting end constitutes, and doughnut is perforate; Following casting end is directly by epoxy resin casting closed pore (being that casting resin also enters the doughnut inside among Fig. 1).Casting resin adopts resins such as known epoxy resin, polyurethane to carry out the end-blocking casting, and re-using flexible resins such as silicon rubber, polyurethane carries out second casting to the hollow-fibre membrane root, can effectively solve the problem of membrane fiber root fracture, satisfies instructions for use.

As shown in Figure 2, the upper end of each membrane module of the present invention all connects collector pipe 5, and the lower end connects sudden and violent tracheae 6.Fig. 3 is the end view drawing of the casting end of membrane module.As can be seen, sudden and violent air vent aperture equates, is the circumferential distribution.The sudden and violent stoma number of inner ring of circular distribution is 3 or 4, the situation of a centre bore can not appear having only, when the membrane module diameter less, during as 3 or 4 inches, can be monocycle, when the membrane module diameter was big, for multi-ring annular distributes, and the pitch difference between any two adjacent sudden and violent pores should not surpass 30%.Sudden and violent hole diameter 4～14mm.

Fig. 4 demonstrates the schematic diagram that many membrane modules constitute a row.The upper port of single membrane module is by collector pipe 5 parallel connections, and lower port connects by sudden and violent tracheae 6.Fig. 5 demonstrates the schematic diagram of the unit membrane assembly that is made of many rows membrane module.The unit membrane assembly comprises: outmost framework, arrange membrane module more.Collector pipe is arranged on the membrane module upper end, tracheae is arranged on the lower end of membrane module cruelly, and collector pipe and sudden and violent tracheae are fixed on the framework, thus the component units membrane module.

Claims

1, a kind of modular external pressure hollow fiber film assembly comprises the single membrane module of framework and Duo Zhi, it is characterized in that:

Single membrane module comprises upper and lower end and is filled in therebetween external pressure hollow-fibre membrane that single fiber film component is not provided with sleeve pipe;

A plurality of membrane module upper port are carried out parallel connection by collector pipe, lower port by sudden and violent tracheae and are constituted a row;

Many row's membrane modules are contained in the framework.

2, modular external pressure hollow fiber film assembly according to claim 1 is characterized in that:

Single membrane module has upper and lower casting end, the wherein hollow-fibre membrane perforate at top casting end place, and it is the hollow-fibre membrane closed pore at casting end place down, and on the casting end a plurality of pod apertures is arranged down.

3, modular external pressure hollow fiber film assembly according to claim 2 is characterized in that:

The casting end is for circular, and a plurality of pod apertures are that circumferential evenly distributes.

4, modular external pressure hollow fiber film assembly according to claim 2 is characterized in that:

The casting end is rectangle, and a plurality of pod apertures are that rectangle evenly distributes.

5, according to the described modular external pressure hollow fiber film assembly of any claim of claim 1 to 4, it is characterized in that:

Adopt resins such as epoxy resin, polyurethane that the hollow-fibre membrane root is carried out the end-blocking casting, use flexible resins such as silicon rubber, polyurethane to carry out second casting.

6, modular external pressure hollow fiber film assembly according to claim 1 is characterized in that:

Sudden and violent air vent aperture in the above-mentioned sudden and violent tracheae equates, is circumferential and distributes, and the sudden and violent stoma number of inner ring of circular distribution is 3 or 4, and the pitch difference between any two adjacent sudden and violent pores should not surpass 30%.