JPH01115417A - Ceramic filter device - Google Patents

Abstract

PURPOSE:To obtain the title device especially suitable to the water treatment of large capacity by providing plural modules consisting of bundled ceramic filters both end of which are hermetically fixed, a specified connecting tube, a sealing means, and a supporting means. CONSTITUTION:The ceramic filter device is so constituted that two modules 12 in which a number of ceramic filters 10 are bundled and fixed to be sealed are liquid-tightly connected with a connecting tube 13. A seal part 14 is formed by molding with a casting resin surrounding the outer periphery of numerous hollow threads, and a screw part 15 is formed on the outer periphery of the sealing part. The connecting tube 13 is provided with screw grooves 16 fitting on screw groves 15, and recessed grooves 17 are cut on stage parts A, A in the middle part of the connecting tube 13 to fit O-rings 18. Notched parts are formed on stage parts B, B of the seal parts 14 and a bending washer having a tongue part on its periphery is put between the stage part B and the end part of the connecting tube 13 so as to engage the tongue part with the notched part. The device is assembled by screwing the end parts of the connecting tube 18 after the bending washer is disposed to fit the tongue part into the notched part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a ceramic filter device useful as a microfilter, an ultrafilter, or a reverse osmosis filter.

(Prior art) Hollow fiber membranes are widely used in various membrane separation devices because they have a fine ring-shaped cross section, can provide a large membrane area within a unit volume, and have excellent pressure resistance. ing.

A large number of these hollow fiber membranes are grouped together and sealed at both ends, or folded into a U shape and sealed at the open end to form a module, which can be used for precision filters, ultrafilters, etc. It is widely applied as a reverse osmosis filter in various fields such as electronic industry, medical care, and wastewater treatment.

By the way, when such hollow fiber membrane filters are used for large-capacity water treatment at nuclear power plants, etc.

It is necessary to increase the membrane area of the hollow fiber membrane filter in proportion to the amount of water to be treated. In order to increase the membrane area of the hollow fiber membrane filter in this way, it is necessary to increase the number of modules of the hollow fiber membrane filter or to increase the capacity of one module. However, in the former case, it is difficult to planarly arrange a large number of modules on a limited floor space.

This is not preferable because it increases the occupied area. On the other hand, in order to increase the capacity of one module without increasing the occupied area, it is conceivable to increase the length of the module. However, as shown in FIG.
In conventional hollow fiber membrane filters, which are molded and fixed with a casting resin such as epoxy resin and seal portions 3a and 3b are formed at both ends, the length L between the seal portions is usually about 1 m, and longer lengths are not possible. If the length L is made longer, there are problems in that when a failure occurs during one operation and it becomes necessary to replace the module, not only will the cost be high, but the long length will make it very difficult to handle.

In addition, in the figure, 4 is a liquid passage.

Furthermore, hollow fiber membrane filters have the problem of not being able to withstand high temperatures and pressures.

(Problems to be Solved by the Invention) The present invention has been made in order to eliminate the drawbacks of such conventional hollow fiber membrane filters, and it is possible to easily increase or decrease the filtration capacity depending on the amount of water to be filtered. It is an object of the present invention to provide a ceramic filter device in which even if a failure occurs, only the failed part can be easily replaced, and the heat resistance and pressure resistance can be further improved.

[Structure of the invention]

(Means for Solving the Problems) That is, the present invention comprises a plurality of modules formed by converging a large number of ceramic filters of approximately equal length and sealing and fixing both ends thereof, and inserting the seal portions of the modules from both ends. a sealing means for fluid-tightly sealing between the connecting tube and the sealing portion of the module inserted into the connecting tube; and sealing means for fluid-tightly sealing between the connecting tube and the sealing portion of the module inserted from both ends thereof. By providing a removable holding means, the filtration capacity can be easily increased or decreased depending on the amount of water to be filtered, and even in the event of a failure, only the failed part can be easily replaced. and heat resistance,
It has improved pressure resistance.

(Function) According to the present invention, a filter device that is easy to replace and has improved heat resistance can be provided.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention.

The ceramic filter device of this embodiment consists of two modules 12 formed by converging a large number of ceramic filters 10 of approximately the same length along a hollow support 11 and fixing both ends thereof with a seal, using a connecting tube 13. It has a liquid-tight connection.

The seal portion 14 of each module 12 is formed by molding the outer periphery of the ends of a large number of bundled hollow fiber membranes with a casting resin such as epoxy resin with the openings exposed. A screw thread 15 is formed. Furthermore, threaded grooves 16 are formed on the inner surface of both ends of the connecting tube 13 to be screwed into the screw threads 15 of the seal portion 14 . Further, annular step portions A, A are formed in the center of the connecting tube 13 so as to face both opening sides, and this annular step portion A has a groove 1.
7 is carved, and an O-ring 18 is fitted into the groove 17. Also, a step B is located at a position corresponding to the distance between the end face of the connecting tube 13 and the step A from the tip of the seal portion 14.
.

A notch 19 is formed in this stepped portion B, as shown in FIG.

A folding washer 20 is inserted between the stepped portion B and the end face of the connecting cylinder 13, with a cut piece 20a cut and raised on one circumference, with the cut piece 20a engaged with the cutout portion 19.

This ceramic filter device has a stepped portion B of the seal portion 14.
The folding washer 20 is placed so that the cut piece 20a engages with the notch 19, and the end of the connecting tube 13 is screwed onto the washer 20 to assemble it. At this time, the O-ring 18 is tightened at the end face of the seal portion 14, and sufficient liquid tightness is obtained. Further, since the folding washer 20 engages with the notch 19 of the seal portion 14, the connection will not loosen due to flow pressure of the processing liquid, vibration, etc. Furthermore, even if a failure occurs in any of the connected modules 12, it is possible to replace only this failure by performing the reverse operation to the above.

Although the above embodiment describes an example in which two modules 12 are connected by the connecting tube 13, the present invention is not limited to such an embodiment, and three or more modules 12 may be connected in series. It is also possible to do so.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to easily connect a plurality of modules, and the processing capacity can be easily changed depending on the amount of water to be filtered. Therefore, it is very effective when used in fields where planar space is limited, such as nuclear power plants. In addition, since modules can be easily removed, only the failed part can be replaced when multiple modules are connected vertically.
Maintenance costs can be reduced. Furthermore, since the structure is simple, there is an advantage that replacement time is short.

Furthermore, by making the filter ceramic, it is possible to improve heat resistance and pressure resistance, and also to extend the life of the filter.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing the main parts of an embodiment of the present invention, and FIG.
The figure is a longitudinal cross-sectional view showing the connection part, and FIG. 3 is a diagram schematically showing a conventional hollow fiber membrane module. 10...Ceramic filter 11...Support body 12...Module 13...Connecting tube 14...Seal portion 17...Concave groove 18...O-ring 19...Notch portion 20... ...Folding washer agent Patent attorney Nori Chika Ken Yudo Daishimaru Ken Figure 1 Figure 2

Claims (1)

[Claims] A plurality of modules each having a plurality of ceramic filters of approximately equal length bundled together and sealed and fixed at both ends, a connecting tube into which the seal portion of the module can be inserted from both ends, and the connecting tube and the connecting tube are inserted into the connecting tube. and a holding means for removably holding the connecting tube and the sealing portions of the module inserted from both ends thereof. Ceramic filter device.