JPH062218B2 - Hollow fiber membrane module - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hollow fiber membrane module incorporated in a filter installed in a power plant or the like, and particularly, to attachment / detachment when replacing the hollow fiber membrane module. The present invention relates to an improvement of a hollow fiber membrane module that enables labor saving of disposal work.

[Prior Art] A hollow fiber membrane type filter used as a filtration device in a power plant is connected to, for example, a filter body 2 connected to an inlet pipe 1 and a water outlet pipe 3 as shown in FIG. It is composed of a lid plate 4, a filter body 2 and a tubular plate-shaped module fixing plate 5 sandwiched between the lid body 4 and the hollow fiber membrane module 6 suspended from the fixing plate 5.

In the structure of the hollow fiber membrane module 6 constituted by a bundle of hollow fiber membranes, as shown in FIG. 8, the upper fixing ring 9 having the O-ring 8 is conventionally connected to the main body case 10, and the main body case 10 is connected. A lower fixing ring 11 is connected to the lower portion of 10. The upper fixing ring 9, the main body case 10, and the lower fixing ring 11 accommodate a bundle of hollow fiber membranes bonded with an epoxy resin.

During transportation and storage of the hollow fiber membrane module, in order to prevent the hollow fiber membrane from drying, the hollow fiber membrane is filled with water, and the upper fixing ring 9 and the lower fixing ring 11 are fitted with transportation caps 20, respectively, to attach the main body case. 10 each opening hole 16
Is sealed with a plug 21 and the inside is sealed with water to be transported and stored.

When the hollow fiber membrane module is mounted on the module fixing plate 5 of the hollow fiber membrane filter, the upper transportation cap 20 is removed and replaced with the module lifting metal fitting 22 (the module lifting metal fitting 22 is screwed into the upper fixing ring 9). ), The hollow fiber membrane module 6 is lifted, mounted on the module fixing plate 5, and after hanging, the module lifting metal fitting 22 is removed.
The plug 21 that was removed from the lower transport cap 20 and was screwed into each opening hole 16 of the main body case 10
Is removed and used to remove the water filled in the water-sealed state in order to prevent the hollow fiber membrane from drying.

The main body case 10 is made of polypropylene, the upper fixing ring 9 and the lower fixing ring 11 are made of stainless metal, and the upper fixing ring 9 and the lower fixing ring 11 are fixed to the main body case 10 by screwing, respectively, and the screws are used to prevent the rotation. is there.

The flow of water in the hollow fiber membrane filter shown in FIG.
The undiluted solution from the inlet tube 1 and the lower slit of the hollow fiber membrane module 6 mounted on the module fixing plate 5 and the main body case 1
The water that has flowed in through the open hole 16 of 0 and filtered and removed the clad iron and the like on the outer surface of the hollow fiber membrane flows out through the hollow portion of the hollow fiber membrane to the upper portion of the hollow fiber membrane module 6 and becomes hollow. It is discharged from the water outlet pipe 3 on the upper part of the fiber membrane filter.

When the hollow fiber membrane module 6 captures the clad iron and the like in the stock solution and the filtration differential pressure rises, compressed air is forced into the filter by the supply pipe 7 to give vibration to the hollow fiber membrane module 6. The suspension containing the clad and the like adhering to the outer surface is peeled off and discharged together with the water retained in the filter through the drain pipe.

However, when the hollow fiber membrane module 6 is used for a long period of time and the suspension adheres to the fine pores of the module 6 and the suspension does not separate even when vibrated by the compressed air, the difference of the module 6 Pressure does not fall to the initial differential pressure. As described above, the hollow fiber membrane module whose pressure difference cannot be reduced is replaced with a new hollow fiber membrane module at the time of regular inspection. Then, the replaced old hollow fiber membrane module is subjected to incineration or the like.

Examples of related devices of this type include those described in JP-A-62-1409, JP-A-62-23406, JP-A-62-35292, and the like.

[Problems to be Solved by the Invention] However, in the conventional hollow fiber membrane module 6 shown in FIG. 8, since the upper fixing ring 9 and the lower fixing ring 11 are not integrated with the main body case 10, sealing performance is improved. However, there is a problem in that the dimensional accuracy of these joints must be increased in order to maintain the above for a long period of time. Moreover, when it becomes necessary to replace with a new one, in the replacement work of the hollow fiber membrane module 6, the upper and lower transportation caps 20 are removed, the plugs 21 screwed into the multiple opening holes 16 are removed, and the upper portions are fixed. Ring 9
There is a problem that it takes a lot of time and labor to attach and detach the module lifting metal fitting 22 to and from the hollow fiber membrane module 6, and when the hollow fiber membrane module 6 is incinerated, the upper fixing ring 9 and the lower fixing ring are used. Since 11 and its anti-rotation screw etc. are made of stainless steel, there is a problem that they are incinerated residues and must be separately treated specially.

The present invention is intended to solve the above problems. That is, according to the present invention, the sealing property can be enhanced, and the work at the time of exchanging the hollow fiber membrane module can be simplified, the exchanging time and labor can be shortened, and the incineration disposal is easy. It is an object of the present invention to provide a hollow fiber membrane module that can be realized.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a hollow fiber membrane module for concentrating hollow fiber-like porous molecular membranes used in a filtration device, comprising: The main body case, the upper fixing ring, and the lower fixing ring are made of plastic and are integrally coupled together, and the upper cap made of plastic also acts as a suspender detachably coupled to the upper portion of the upper fixing ring, and the lower fixing ring. And a rubber belt having a rubber stopper removably fitted in a large number of side surface opening holes of the main body case.

[Operation] According to the present invention, since the main body case, the upper fixing ring and the lower fixing ring of the hollow fiber membrane module are made of plastic and integrally connected, the sealing performance is high and the weight is light and the handling is easy. In addition to being easy, it can be incinerated, resulting in very little residue from incineration. Also, since the upper cap is screwed on the upper part of the upper fixing ring and the lower cap made of rubber is fitted on the lower part of the lower fixing ring, the sealing property is further improved and each of these caps is fixed. A lower cap other than the upper cap can be detachably coupled to the ring, and a rubber cap having a rubber plug removably fitted in the side opening hole of the main body case can be used. Each member of the rubber belt can be easily and easily attached and detached, and it is possible to shorten the working time and labor when replacing the hollow fiber membrane module.

[Examples] Fig. 1 shows an embodiment of the hollow fiber membrane module of the present invention, and Figs. 2 to 5 show the respective parts of Fig. 1 in an enlarged manner. FIG. 6 is a sectional view of a large number of rubber belts 17 with rubber plugs.

In the hollow fiber membrane module 6 of this embodiment, the upper part of the polypropylene main body case 10 is screwed into the polypropylene upper fixing ring 9 to which the O-ring 8 is attached and fixedly connected by spot welding. The lower part is likewise fixedly connected to a lower ring 11 made of polypropylene. A hollow fiber membrane 12 bundled with an epoxy resin 13 is housed in the upper fixing ring 9, the main body case 10, and the lower fixing ring 11.

The upper fixing ring 9 of the main body case 10 during transportation and storage
An upper cap 14 made of plastic, which serves both as a transporter and a hanging tool, is screwed into the lower fixing ring 1 of the main body case 10.
The lower cap 15 is press-fitted so as to cover the non-slip groove 11a formed in 1, and the opening hole 16 is formed by the rubber belt 17 having the rubber plug 17a that is detachably fitted into the multiple opening holes 16 on the side surface of the main body case 10. Then, the rubber belt 17 is closed with a rubber band 18 (see FIGS. 3 and 4).
(See the drawing), the lower cap 15 is tightened with a nylon band 19 so as to bite into the groove 11a (see FIG. 5), and the inside of the main body case 10 is sealed with water.

When this hollow fiber membrane module is used by mounting it in the hollow fiber membrane type filter, it is lifted by the upper cap 14 and mounted on the module fixing plate 5, and the rubber band 18 and the rubber plug 17 are used.
The rubber belt 17 having a, the band 19, the upper cap 14 and the lower cap 15 are removed, and the inside of the main body case 10 is drained for use.

In the hollow fiber membrane module 6 of the embodiment of the present invention configured as described above, the main body case 10 of the module 6 is
, The upper fixing ring 9 and the lower fixing ring 11 are made of plastic (polypropylene) and integrated, and the upper cap 14 forming a suspender is screwed into the fixing ring and press-contacts with the O-ring 8. Since the lower cap 15 is made of rubber and is elastically covered with the lower fixing ring, and the opening hole 16 is closed by the rubber belt 17 having the rubber plug 17a, the sealing performance is high and the rubber band 18 is used. Since the rubber belt 17 is tightened and the lower cap 15 is tightened by the nylon band 19 so as to bite into the groove 11a, its sealing property is further enhanced. In addition, since there are no metal parts, it is lightweight and easy to handle, and because it is made entirely of incinerable material, the residue produced by incineration is extremely small. Moreover, the upper cap 14 can be used as a suspending tool for transportation and storage of the module 6, and the only component that needs to be screwed in during the handling work is the upper cap 14, and the lower cap 15 can be attached to and detached from the lower fixing ring 11. The rubber belt 17 is pressed into the main body case 10 and
Since it has a rubber plug 17a which is detachably fitted in the opening hole 16 of the module 6, each member such as the lower cap 15 and the rubber belt 17 can be attached and detached by a simple operation, and a working time when the module 6 is replaced. And labor can be reduced.

[Advantages of the Invention] As described above, according to the present invention, since the main body case, the upper fixing ring, and the lower fixing ring of the hollow fiber membrane module are made of plastic and integrated,
It has a high sealing property, is lightweight and easy to handle, and because it is made entirely of incinerable material, it produces very little residue from incineration. Further, since the upper cap screwed into the upper part of the fixing ring and the lower cap made of rubber which is press-fitted to the lower part of the lower fixing ring are provided, the sealing performance is further improved, and each of these caps is That can be removably coupled to the fixing ring of, and that the upper cap has a function as a hanger,
By providing the rubber belt having the rubber plug removably fitted in the opening hole of the main body case, it becomes extremely easy to attach, remove and handle each of these members, and therefore, the replacement of the hollow fiber membrane module. It is possible to reduce the work time and labor in case of.

[Brief description of drawings]

FIG. 1 is a front view showing a hollow fiber membrane module according to an embodiment of the present invention with a part thereof cut away, and FIG. 2 is an enlarged sectional front view showing the vicinity of the upper fixing ring of FIG. FIG. 3 is a front view showing a right half of the main body case shown in FIG. 1 by notching and enlarging it, FIG. 4 is a sectional plan view taken along a cutting line AA in FIG. 3, and FIG. 1 is an enlarged front view showing a part of the lower fixing ring in the vicinity of the lower fixing ring, FIG. 6 is a sectional view of a rubber belt with a rubber plug used in the above embodiment, and FIG. 7 is a hollow fiber membrane module. Sectional front view of the hollow fiber membrane filter
FIG. 8 is a front view showing a conventional hollow fiber membrane module with a part cut away. 6 ... Hollow fiber membrane module 9 ... Upper fixing ring 10 ... Main body case 11 ... Lower fixing ring 12 ... Hollow fiber membrane 14 ... Upper cap 15 ... Lower cap 16 ... Opening hole 17 ... Rubber belt 17a ... Rubber plug

Claims (1)

[Claims] 1. A hollow fiber membrane module comprising a bundle of hollow fiber-shaped porous polymer membranes for use in a filtration device, wherein the hollow fiber membrane module main body case, upper fixing ring and lower fixing ring are both made of plastic. Upper cap made of plastic, which also functions as a suspender and is detachably screwed onto the upper part of the upper fixing ring, and a rubber lower part which is detachably fitted to the lower part of the lower fixing ring. A hollow fiber membrane module comprising: a cap; and a rubber belt having a rubber plug removably fitted into a large number of side surface opening holes of the main body case.