JPH0222009Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is housed in the casing of a pressure vessel,
The present invention relates to a filter member for a pressure vessel, which passes through a mesh filter the raw liquid to be treated that is supplied to the casing, and sends only the liquid out of the pressure vessel.

(Prior Art) A filter member inserted into a pressure vessel is already known from West German Patent Specification No. 2114226, but this type of filter member has an extremely complicated structure and increases the price of the pressure vessel as a whole. There were problems that occurred.

Therefore, for the purpose of improving such filter members, a plurality of sleeve tubes 3 having a large number of through holes 2 are provided around a central tube 1 having no holes in the peripheral wall, as shown in FIGS. 6 and 7. The sleeve unit 4 is arranged to form a tube bundle-like sleeve unit 4.
The upper and lower ends of the center tube 1 and sleeve tube 3 are supported by an upper cover 5 and a bottom plate 6, and the upper end of the center tube 1 is made to protrude upward from the upper cover 5.
a lower end of which is communicated with a space 8 within each sleeve pipe 3 through a recess 7 formed in the bottom plate 6, and further,
A filter member having a simple structure in which a mesh filter 9 is stretched around the outer periphery of a sleeve unit 4 is disclosed in Japanese Patent Application Laid-Open No. 1986-
It was proposed in Publication No. 204208 and has been put into practical use.

(Problem to be solved by the invention) However, in the above conventional filter member,
Since the structure is such that the center tube 1 is located within a vertically elongated gap 10 surrounded by a plurality of circumscribed sleeve tubes 3, the design has been changed to reduce the number of sleeve tubes 3 constituting the sleeve unit 4 to five or less. If you try to do so, the gap 10 becomes smaller as shown in FIG. If you try to increase the number of tubes to more than seven, the cross-sectional area of the gap 10 will become larger than necessary, as shown in FIG. Therefore, in the conventional filter member, the number of sleeve pipes 3 and the diameter of the center pipe 1 influence each other, resulting in a difficulty in reducing the degree of freedom in designing the filter member, and there is room for further improvement in this regard. was left behind.

The present invention focuses on the problems that such conventional filter members have, and by inserting a center tube into each sleeve tube constituting the sleeve unit and making the sleeve unit a double tube structure, the sleeve tube It is an object of this invention to solve the above-mentioned problems by providing a configuration in which the thickness of the central tube and its passage cross-sectional area can be set to any desired size regardless of the number of tubes.

(Means for Solving the Problems) The structure of the present invention for solving the above object will be explained with reference to FIGS. 1 and 2, which correspond to embodiments.

The filter member 20 of the present invention includes a tube bundle-like sleeve unit 26 in which a plurality of sleeve tubes 25 having a large number of through holes 24 in the peripheral wall are arranged in circumferential contact with each other, and a tube bundle-like sleeve unit 26 that is stretched around the outer periphery of the sleeve unit 26. It is configured to include a mesh-like filter 27.

Each sleeve pipe 25 constituting the sleeve unit 26 has a central pipe 3 in the form of a non-porous pipe inside.
It has a so-called double tube structure in which 0 is inserted in each tube.

Note that the sleeve tubes 25 having the double tube structure are normally arranged in a ring shape with tubes of the same diameter circumscribed, but if necessary, tubes of different diameters may be circumscribed and arranged to achieve the best space filling rate. It is also possible to configure it to be larger.

Also, regarding the thickness of the center tube 30, the thickness of the center tube 30 relative to the cross-sectional area of the space 29 in the sleeve tube 25
It can be set arbitrarily by taking into account the ratio of the cross-sectional area of the liquid delivery passage 32 in 0, etc.

(Function) In the filter member of the present invention having the above configuration, the raw liquid to be treated in the pressure vessel is passed through the mesh filter 27 stretched around the outer periphery of the sleeve unit 26, so that only the liquid permeates into the space 29 of the sleeve pipe 25. The liquid flows in through the hole 24 and is sent out to the outside of the pressure vessel through the liquid delivery passage 32 in the central pipe 30 inserted into the space 29 and piping (not shown).

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

Fig. 1 is a longitudinal cross-sectional view showing an example of a filter member according to the present invention, Fig. 2 is a cross-sectional view of the same filter member, and Fig. 3 is a longitudinal cross-sectional view showing the overall configuration of a pressure vessel to which the filter member of the present invention is applied. , FIG. 4 is a cross-sectional view of the isobaric vessel.

In these figures, 11 is the pressure vessel body, 12
a pressure vessel lid, 1 which is mounted on the upper part of the pressure vessel body 11 and is connected to the body 11 via the flange portion 13;
Reference numeral 4 denotes an inlet for the raw solution to be treated provided at the bottom of the pressure vessel main body 11, 15 indicates a slag discharge port provided at the bottom of the pressure vessel main body 11, and 16 indicates a stock solution storage whose inner end is located from both sides of the pressure vessel main body 11. Tubular filter support members 20 are inserted alternately into the chambers 17 and have outer ends connected in a comb-like manner to the liquid collecting pipes 19, 19' via on-off valves 18, 18'. These filter members, which form the main part of the present invention, are attached to a plurality of filter connection portions 21 provided on the lower surface of the filter support member 16 so as to hang down from each other.

The filter member 20 has a hollow top lid 22 and a bottom plate 23 that are vertically opposed to each other with a required interval.
Sleeve pipes 25, 25 of a required length with a large number of through holes 24 for liquid permeation bored in the peripheral wall between the sleeve pipes 25, 25
A sleeve unit 26 is arranged in a ring shape and circumscribed with each other, and the sleeve unit 26 is vertically installed, and the upper and lower ends of each sleeve pipe 25, 25... are fixed to the lower surface 22a of the upper lid 22 and the upper surface 23a of the bottom plate 23. At the same time, a right cylindrical mesh filter 27 is stretched around the outer periphery of the sleeve unit 26, and the upper and lower ends of the mesh filter 27 are connected to annular filter lock members 28,
It has a structure in which it is fixed to the outer surfaces of the upper lid 22 and the bottom plate 23 by 28'. Furthermore, the sleeve pipe 25 constituting the sleeve unit 26 is
A central tube 30 having a closed tubular surface is housed in the internal space 29 of each of the central tubes 30.
an upper lid 2 whose upper end corresponds to the ceiling surface of the space 29;
2, and each liquid delivery path 3 in the central pipe 30, 30...
2 communicate with each other at the upper end side via the hollow chamber 33 in the upper lid 22, and communicate with the space 29 in each sleeve tube 25 at the lower end side,
The hollow chamber 33 is connected to the filter support member 16 via a flanged connecting pipe 34 protruding from the upper surface of the upper lid 22 and a passage within the filter connecting portion 21 .

The central tube 30 housed in the sleeve tube 25 has a thickness such that the ratio of the cross-sectional area of the liquid delivery passage 32 in the central tube 30 to the cross-sectional area of the space 29 in each sleeve tube 25 is appropriate. It is possible to arbitrarily set the flow rate so that the pressure drop of the liquid is prevented, thereby making it possible to make the flow smooth.

Furthermore, since the mounting interval of the filter support members 16 with respect to the liquid collection pipes 19, 19' is twice the arrangement interval of the filter support members 16, that is, the interval of every other row is maintained, the intervals between the adjacent open/close valves 18 are maintained. The mounting flanges and the connection parts of the flange support members 16 do not interfere with each other, the arrangement interval of the flange support members 16 in the pressure vessel main body 11 is made smaller, and the number of filter support members 16 is increased to arrange the filter members 20. It is effective in increasing density.

The filter member of the present invention has the configuration described above, and its function will be explained next.
First, in the overtreatment process, when the raw liquid to be treated is pressurized into the pressure vessel main body 11, the raw liquid to be treated passes through the mesh filter 27 stretched around each filter member 20.
The liquid passes through the through hole 24 protruding from the sleeve tube 25 and enters the space 29, enters the hollow chamber 33 in the upper cover 22 through the liquid delivery passage 32 opened at the lower end of the center tube 30, and enters the space 29. The fluids join together at the connecting pipe 34 and are sent out to the outside through the flow paths in the filter connection part 21, the filter support member 16, and the liquid collecting pipes 19, 19'.

Note that during this time, each sleeve pipe 25 passes through a mesh filter 27 provided around the outer periphery of the sleeve unit 26.
are supported in a corrugated surface shape to improve liquid circulation, and the center tube 30 is located at the center of each sleeve tube 25 to ensure smooth liquid delivery.

Furthermore, during backwashing, when clean liquid is supplied into the pressure vessel 11 through the liquid collecting pipes 19 and 19', this clean liquid enters the space 29 in the sleeve pipe 25 from the center pipe 30 and passes through the through hole 24 in the radial direction. The mesh filter 27 is expanded to have a circular cross section, and the slag clogged in the mesh of the mesh filter 27 is washed and removed.

In addition, in the above embodiment, the sleeve pipe 25 and the center pipe 3 constituting the sleeve unit 26 are
Although a case has been described in which a plurality of sleeve units 26 having the same diameter are used and arranged in a ring shape while keeping parallel to each other, the configuration of the sleeve unit 26 is not limited to this. As an example is shown in the figure, it is also possible to prepare a plurality of types and a plurality of sleeve tubes 25 and center tubes 30 with different diameters, and to combine and arrange them so as to maximize the space filling ratio. Needless to say, design modifications may be made as appropriate without departing from the gist of the present invention, which is a double pipe structure.

(Effects of the invention) As described above, the present invention arranges a plurality of sleeve tubes having a large number of through holes in the peripheral wall in circumferential contact to form a tube bundle-like sleeve unit, and a mesh filter is placed around the outer periphery of the sleeve unit. The sleeve tube of the pressure vessel filter section is made of a double tube structure, with central tubes for liquid delivery housed in the inner space of the sleeve tube, respectively, for the pressure vessel filter section. It is possible to arbitrarily set the thickness of the central tube regardless of the diameter or arrangement, and it has the excellent effect of greatly expanding the degree of freedom in designing the filter member.

Moreover, according to the present invention, the thickness of the center tube, that is, the cross-sectional area of the liquid delivery passage can be appropriately secured in accordance with the thickness of the sleeve pipe, so that the cross-sectional area of the liquid delivery passage can be appropriately secured. It is possible to prevent a decline in over-treatment capacity due to pressure loss during liquid delivery, and even during backwashing, the double pipe structure with the center pipe of each sleeve pipe prevents the cleaning liquid from being unevenly distributed. The effect of uniformly supplying the cleaning liquid to the sleeve pipe and further improving the cleaning action of the mesh filter can also be expected.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a filter member for a pressure vessel according to the present invention, and FIG. 2 is a cross-sectional view of the same filter member.
FIG. 3 is a longitudinal sectional view showing the overall structure of a pressure vessel to which the filter member of the present invention is applied, FIG. 4 is a cross-sectional view of the same pressure vessel, and FIG. 5 is a cross-sectional view showing a modified embodiment of the filter member of the present invention. FIG. 6 is a longitudinal cross-sectional view of a conventional filter member, FIG. 7 is a cross-sectional view of the same filter member, and FIGS. 8A to 8E are explanatory diagrams showing the arrangement of sleeve tubes, respectively. 24...Through hole, 25...Sleeve pipe, 26...
Sleeve unit, 27...Mesh filter, 29
... Space, 30 ... Central pipe, 32 ... Liquid delivery passage.

Claims (1)

[Scope of utility model registration request] A filter member for a pressure vessel, in which a plurality of sleeve tubes having a large number of through holes in the peripheral wall are arranged in circumferential contact to form a tube bundle-like sleeve unit, and a mesh filter is stretched around the outer periphery of the sleeve unit, A filter member for a pressure vessel, characterized in that each of the sleeve tubes has a double tube structure in which a center tube forming a liquid delivery passage is accommodated in the inner space of each sleeve tube.