CN2491096Y - Externally pressed hollow fiber membrane modular - Google Patents

Abstract

The utility model relates to an external pressure hollow fiber membrane module. In the original external pressure hollow fiber membrane module, including the casing and its upper and lower end caps and the external pressure hollow fiber membrane filled in it, the hollow fiber membrane at the upper casting end has holes, and the hollow fiber membrane at the lower casting end The membrane is closed, and there are multiple diversion holes on the lower casting end. The characteristic design is that a baffle is installed on the inner side of the lower casting end close to the lower side port, and a retaining ring is installed at the corresponding position of the upper side port of the upper casting end. The utility model can protect the membrane fibers during the membrane separation work and online cleaning of the membrane components, improve the cleaning effect, further enhance the membrane separation efficiency, and is suitable for continuous industrial production.

Description

The external pressure hollow fiber film assembly

The utility model relates to membrane separation technique, is specially the external pressure hollow fiber film assembly, and international Patent classificating number intends being B01D65/10.

Membrane separation technique and device now have been widely used in the industrial circles such as chemical industry, biology, medicine, food, beverage, water treatment, are important a kind of in the modern technologies.Membrane module is the core component of membrane technology and device.Its performance what and quality directly translate into the quality of film system or device performance.The external-pressing film assembly of foreign latest, as company of Japanese Asahi Chemical Industry product (referring to Fig. 5), the external-pressing film assembly of present use has been done improvement: the one, the top casting end of membrane module still is the hollow-fibre membrane open cell type, and the casting end is designed to obturator-type down; The 2nd, in the end design of casting down a plurality of pod apertures are arranged.This membrane module designs changes film system works route to some extent, and promptly closing membrane assembly downside mouth makes the work feed liquid enter in the membrane module by pod apertures from lower port, and through membrane filtration, filtered solution flows out from the membrane module upper port, and concentrate is discharged from membrane module upside mouth.The advantage of this design is to inject solid-liquid ratio from the membrane module lower port to inject feed liquid to the external pressure hollow-fibre membrane from its downside mouth, feed liquid is evenly distributed, operating pressure is even, the hollow-fibre membrane availability is higher, avoid producing the dead angle (when the downside mouth injects feed liquid, the feed liquid flow velocity of its porch is fast comparatively speaking, and pressure is big, and membrane efficiency is higher; And the feed liquid flow velocity at its inlet offside place is slow, and pressure is little, and membrane efficiency is lower, and particularly membrane module increasing diameter large time difference is more unobvious), membrane separating effect and efficient can improve.

But this membrane module also exists following deficiency: the one, as the membrane module of film device core component an idle downside mouth, functional utilization deficiency are arranged; The 2nd, when design film device purging system need utilize the downside mouth, this place's hollow-fibre membrane impacted damaged easily because of the flow at high speed of liquid or gas, and should place's hollow-fibre membrane during casting also easily near the downside mouth, fluid flowing path is narrowed down; The 3rd, because near the flow velocity of the concentrate upside mouth accelerates suddenly, pressure increases, also damage hollow-fibre membrane easily, and it is same easily near the upside mouth to locate hollow-fibre membrane during casting, fluid flowing path is narrowed down, situation is even more serious when particularly making the heavy caliber membrane module, has influenced the effect and the life-span of membrane module.The deficiency of existing membrane module directly has influence on giving full play to of film system or film device function, is unfavorable for that also film device is extensive, the industrial production of serialization.

The purpose of this utility model is at the deficiencies in the prior art, designs a kind of novel external pressure hollow fiber film assembly, and it can be when film mask work and on-line cleaning membrane module; the diaphragm fiber; improve cleaning performance, and then strengthen the film separation efficiency, be applicable to the serialization industrial production.

The purpose of this utility model is following realization: design a kind of external pressure hollow fiber film assembly, comprise sleeve pipe and its upper and lower end cap and filling external pressure hollow-fibre membrane within it, the external pressure hollow-fibre membrane perforate at its top casting end place, it is the external pressure hollow-fibre membrane closed pore at casting end place down, and on the following casting end a plurality of pod apertures are arranged, its characteristic Design is at the inboard place of end near the downside mouth that cast down catch to be installed, and in the upside mouth corresponding position of top casting end back-up ring is installed.

The utility model membrane module characteristic Design is at the inboard place of end near the downside mouth that cast down catch to be installed, and in the upside mouth corresponding position of top casting end back-up ring is installed.The main purpose one of design catch and back-up ring is the membrane fiber at the upper and lower side mouth of protection place; The 2nd, guarantee that the fluid flowing path at upper and lower side mouth place is unimpeded.The concrete application is that the downside mouth of membrane module is connected in the scavenger circuit of film device.When film work certain hour need clean, utilize lower port to squeeze into compressed air, the concussion air cleans membrane fiber, washes back liquid and discharges from the downside mouth.This cleaning is online, can improve the film separation efficiency, is suitable for the serialization industrial production.But use the membrane module of prior art to have a problem: to clean back liquid when the downside mouth flows out, owing to the flow rate of liquid at downside mouth place is fast, injure the membrane fiber at this place easily on the one hand; Also influence the emptying of pollutant on the other hand, reduce the separating effect of membrane fiber, be unfavorable for the long continuous industrial production.The utility model only simply respectively the upper and lower casting end of membrane module near the inboard of upper and lower side mouth or corresponding position design and installation catch and back-up ring; just the problems referred to above can have been solved dexterously; membrane module existing resource (idle downside mouth) is fully used; protected membrane fiber effectively, and then made the serialization industrial production of film device also be able to reality to carry out effectively.

Be described in further detail the utility model below in conjunction with embodiment and accompanying drawing thereof.

Fig. 1 is an overall structure schematic diagram of the present utility model;

Fig. 2 is the distributed architecture schematic diagram (B of Fig. 1 is to view) that casting end 4 ' is gone up pod apertures 11 under the utility model;

Fig. 3 is catch 10 of the present utility model installation site structural representation (the A--A view of Fig. 1) in membrane module;

Fig. 4 is semicircle catch 10 structural representations of the present utility model;

Fig. 5 is the overall structure schematic diagram of contrast prior art.

The utility model is that the improvement of carrying out on the basis of existing membrane module (referring to Fig. 5) designs (referring to Fig. 1,5), promptly at existing external pressure hollow fiber film assembly, comprise on sleeve pipe 2 and its, bottom end cover 3,3 ' and the external pressure hollow-fibre membrane 1 of filling within it (be called for short hollow-fibre membrane, membrane fiber or film), hollow-fibre membrane 1 perforate at its top casting end 4 places, it is the casting end 4 ' hollow-fibre membrane of locating 1 closed pore down, and on the casting end 4 ' a plurality of pod apertures 11 are being arranged down, its characteristic Design is at the inboard place of end 4 ' near downside mouth 7 that cast down catch 10 to be installed, and in upside mouth 6 corresponding positions of described top casting end 4 back-up ring 9 is installed.

The shaped design of catch 10 has certain influence to realizing the utility model purpose.Embodiment is designed to arc (shown in Fig. 1,3).The length of catch 10 and effective depth (promptly not comprising the height that is installed in down in the casting end 4 ') will be complementary with the diameter of described downside mouth 7, the big 3-20 millimeter of the diameter of general comparable downside mouth 7, thickness does not have specific (special) requirements, gets over Bao Yuehao under the condition that satisfies catch intensity.The catch 10 of embodiment also can be semicircle (as shown in Figure 4), and its physical dimension also should be complementary with the diameter of downside mouth 7, and slightly larger.The installation site of catch 10 is also very important.It should be installed in the place, inboard of casting end 4 ' close downside mouth 7 under the membrane module.Catch 10 will design with the distance of downside mouth 7 internal orifices.This distance is too big, will reduce the quantity of hollow-fibre membrane 1 in sleeve pipe 2, has reduced the operating efficiency of membrane module relatively; And if too little, improved action is with not obvious, the perfection that influences the utility model purpose realizes.This distance is also relevant with the diameter of membrane module, the membrane module that diameter is big, and this distance is also correspondingly big.The comparatively ideal design of this distance of 3-9 inch membrane module is the 3-30 millimeter.6 inches these distances of membrane module of embodiment are designed to 20 millimeters.Also should be noted that catch 10 so-called " installation " actual be meant with hollow-fibre membrane 1 in down together cast of casting end 4 '.

The utility model also is equipped with back-up ring 9 (referring to Fig. 1) at described top casting end 4 with upside mouth 6 corresponding positions.The purpose that increases design back-up ring 9 at top casting end 4 places is the membrane fiber 1 of protection upside mouth 6 vicinity, avoids the concentrate at upside mouth 6 places fast because of flow velocity, and pressure is big, causes the injury to this place's membrane fiber 1 easily, to improve the service life of membrane module; This place's membrane fiber 1 easily close upside mouth 6 in the time of also can overcoming simultaneously because of casting, the disadvantage that fluid flowing path is narrowed down, the serialization of assurance film device is industrial to be carried out smoothly.Also therefore, the distance of back-up ring 9 and upside mouth 6 internal orifices should and described catch 10 and downside mouth 7 internal orifices between required distance the same.This has also determined the diameter dimension of back-up ring 9 simultaneously, and promptly the internal diameter of sleeve pipe 2 deducts the diameter that described distance is exactly described back-up ring 9.The installation site of back-up ring 9 overlaps with the center of membrane module.In like manner, the effective depth of back-up ring 9 should be bigger slightly than the diameter of upside mouth 6.

Be evenly distributed in order to guarantee that feed liquid is entered behind the membrane module on the membrane fibers 1 all in sleeve pipe 2 by membrane module end opening 8, the even distribution of pod apertures 11 is crucial.Further feature of the present utility model is that the distribution of described pod apertures 11 has been carried out improving design, promptly on the basis that circular pod apertures, aperture equate, is pod apertures 11 that annular (when the membrane module diameter dimension is bigger, is the belt distribution of multi-turn during as the 5--9 inch by existing linear pattern distribution design; And less when the membrane module diameter dimension, during as 3 or 4 inches, also can be circular distribution, i.e. monocycle) (referring to Fig. 2) evenly distributes.The number of the pod apertures 11 that circular distribution or annular inner ring distribute should be designed to 3 or 4, the situation of a centre bore can not appear having only, no matter circular or belt the distribution, the range difference between adjacent two pod apertures 11 should not surpass 30% arbitrarily.Though how much directly related with the diameter dimension of membrane module the pore size of pod apertures 11 is with number, the more important thing is whether evenly distribute directly related with it.The aperture of pod apertures 11 is more little, and it is easy more even to distribute, but casting processing is difficult more; The aperture of pod apertures 11 is big more, distribute to be not easy relatively more evenly, but casting processing is easy relatively more.Therefore, the pore size of pod apertures 11 should appropriateness be grasped, and is generally 6-20mm.The aperture of 6 inches membrane module designs pod apertures 11 of the utility model embodiment is 12 millimeters, and number is 12, is divided into inside and outside two circles, and inner ring is designed to 4.Obviously, for reaching equally distributed purpose, the design of pod apertures 11 is not limited by embodiment.

The operation principle of the utility model membrane module is, when the film mask work, feed liquid enters by uniform pod apertures 11 in the chamber of sleeve pipe 2 from lower port 8, and after the centrifugation of membrane fiber 1, filtered solution flows out from upper port 5; Concentrate is then discharged from upside mouth 6.When needs on-line cleaning membrane module, then squeeze into compressed air, with the membrane fiber 1 in the concussion rinsing membrane module sleeve pipe 2 by lower port 8.Wash back liquid side and discharge (referring to Fig. 1) from downside mouth 7.

Membrane module structure of the present utility model is applicable to 3-9 inch external pressure type hollow fiber membrane component, is specially adapted to the heavy caliber membrane module, and for example 6 inches and 9 inches membrane modules can be used for the film device that scale, serialization are produced.Membrane module with 5 inch diameters is an example, experiment shows, existing membrane module is online also can not to be cleaned up with 6 cubic metres vibration air capacity per hour, and adopt the utility model only to need per hour 4 cubic metres vibration air capacity, it is clean to get final product on-line cleaning, recover the normal use flux of membrane fiber, thereby realize the production of serialization efficiently of film device.

Claims (3)

1. external pressure hollow fiber film assembly, comprise sleeve pipe (2) and its upper and lower end cap (3), (3 ') and filling external pressure hollow-fibre membrane (1) within it, external pressure hollow-fibre membrane (1) perforate that its top casting end (4) is located, its external pressure hollow-fibre membrane (1) closed pore that end (4 ') is located of casting down, and on the casting end (4 ') a plurality of pod apertures (11) are being arranged down, it is characterized in that locating catch (10) is installed near the inboard of downside mouth (7), back-up ring (9) is installed in upside mouth (6) corresponding position of described top casting end (4) at described casting end (4 ') down.

2. external pressure hollow fiber film assembly according to claim 1 is characterized in that described catch (10) is arc or semicircle.

3. according to claim 1,2 described external pressure hollow fiber film assemblies, it is characterized in that described pod apertures (11) evenly distributes ringwise, the number of its inner ring pod apertures (11) is 3 or 4, and the range difference that faces mutually arbitrarily between two pod apertures (11) is no more than 30%.

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