JPS631083B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bag filter device for filtering waste liquid etc. discharged from chemical equipment, nuclear equipment, etc.

Generally, the above-mentioned waste liquid is discharged or reused after being subjected to various treatments, but prior to treatment, solids in the liquid are removed using a bag-shaped so-called bag filter. By the way, since such solids have various properties such as fibrous, they cause clogging and accumulation of these solids in the bag filter device that filters them, resulting in a problem of reducing the filtration ability. For this reason, in a conventional bag filter device of this kind, a bag filter C is provided at the tip of a liquid injection pipe B introduced into a filter tank A, as shown in Fig. 1, and the liquid to be filtered, that is, waste liquid, is directly injected into this bag filter C. is configured to be In addition, this liquid injection tube B has a lid D.
The lid D was attached to the filter tank A with bolts or the like, and the liquid injection pipe B was connected to the waste liquid pipe F via a removable pipe joint E. However, in such a device, when cleaning or replacing the bag filter C, as shown in Fig. 2, a large number of bolts connecting the lid D and the pipe joint E must be removed, and then the liquid injection pipe B and the bag filter C must be removed. The work had to be lifted with a hoist, which was cumbersome and took a long time, and in the case of radioactive waste liquid such as waste liquid from nuclear facilities, the work took a long time, resulting in an increase in radiation exposure for workers. .

The present invention has been made based on the above circumstances, and its purpose is to make it possible to attach and detach bag filters in a short time, thereby making the work more efficient, and in the case of radioactive waste liquid, by shortening the work time. The object of the present invention is to obtain a bag filter device that can significantly reduce the radiation dose for people.

The present invention will be described below with reference to an embodiment shown in the drawings.

In the figure, reference numeral 1 denotes a filter tank, which has a cylindrical shape, and its lower end is closed by an end plate 2, and its upper end is closed by an upper plate 3. An outflow pipe 4 is provided at the lower end of this filter tank 1.
is connected. Further, a circular opening 5 is formed in the center of the upper plate 3, and this opening 5 is closed by a lid 6. The lid 6 is pivotally connected to the upper plate 3 by a hinge 7 so as to be openable and closable, and is provided with a handle 8 for opening and closing the lid. The lid body 6 is configured to be tightened and fixed in the closed state by a tightening and fixing mechanism 9. Reference numeral 10 denotes a bar member, which is provided on the upper surface of the lid body 6 so as to traverse the same. Further, a pair of L-shaped locking members 11, 11 are protruded from the upper plate 3, and when the bolt member 10 rotates, both ends of the bolt member 10 are locked. It is configured to engage members 11,11. Further, a screw rod 12 is rotatably provided at the center of the lid 6, and the screw rod 12 is screwed into the center of the bolt member 10. A tightening handle 13 is attached to the upper end of this screw rod 12, and by rotating this tightening handle 13, the screw rod 12 rotates, pushing up the bolt member 10 and moving the lid 6 onto the upper plate. 3 and is configured to be tightened and fixed. Further, a support plate 14 is provided at the upper part of the inside of the filter tank 1, and the inside of the filter tank 1 is partitioned into upper and lower parts by this support plate 14. The support plate 14 has a conical shape with a lower central portion, and a filter mounting hole 15 is provided in the central portion. A bag filter 16 is mounted in this filter mounting hole 15. The bag filter 16 has a bag shape with an open top, and a locking flange 17 that engages with the peripheral edge of the filter mounting hole 15 is formed at its upper edge. And this bad filter 1
6 is configured to be detachably attached to the filter attachment hole 15 from above through the opening 5 of the upper plate 3, and in the attached state, the bag filter 1
This bug filter 1 can be adjusted by rotating 6.
The locking collar portion 17 of No. 6 is configured to engage with a locking portion (not shown) provided on the support plate 14 to prevent it from coming off upward. Further, a handle 18 for lifting the bag filter 16 is provided at the upper end of the bag filter 16. Furthermore, a movable liquid injection nozzle mechanism 19 is provided at the upper part of the filter tank 1. Reference numeral 20 denotes a liquid injection pipe, which is provided to penetrate the peripheral wall of the filter tank 1 and is connected to a waste liquid pipe 22 via an on-off valve 21. This liquid injection pipe 21 is inclined downward,
The tip thereof is located above the upper end of the bag filter 16 and on the side of the bag filter 16, that is, outside the periphery of the locking flange 17 of the bag filter 16. A nozzle sleeve 23 is attached to the distal end of the liquid injection tube 20 so as to be slidable in the axial direction. The tip of the nozzle sleeve 23 is bent downward, and when the nozzle sleeve 23 moves toward the tip of the liquid injection tube 20, the tip is located above the bag filter 16, and the liquid injection tube 20 The waste liquid sent through the nozzle sleeve 23 is configured to be directly injected into the bag filter 16, and when the nozzle sleeve 23 is moved toward the proximal end of the liquid injection pipe 20, the tip of the nozzle sleeve 23 is inserted into the bag filter 16. It is located on the side, that is, outside the outer peripheral edge of the locking flange 17 of the bag filter 16, and is configured not to interfere with the bag filter 16 when it is removed. Further, a handle 24 for moving the nozzle sleeve 23 is provided on the upper surface of the nozzle sleeve 23.

In the embodiment of the present invention constructed as described above, the nozzle sleeve 23 is moved to the distal end side of the liquid injection tube 20 during use. Therefore, the liquid to be filtered, that is, the waste liquid sent through the waste liquid pipe 22 is transferred to the liquid injection pipe 2.
0 and the nozzle sleeve 23, flows downward from the tip of the nozzle sleeve 23, and is directly injected into the bag filter 16. Therefore, the solids contained in this waste liquid do not accumulate in the apparatus, and are all filtered out by the bag filter 16. The waste liquid filtered by the bag filter 16 is discharged from the outflow pipe 4. When the bag filter 16 is removed for cleaning or replacement, the on-off valve 21 is first closed. Then, the tightening handle 13 of the tightening and fixing mechanism 9 is rotated to loosen the bolt member 10, the bolt member 10 is rotated to disengage from the locking members 11, 11, and the lid body 6 is opened. Then, by inserting a hand through the opening 5, the nozzle sleeve 23 of the movable liquid injection nozzle mechanism 19 is moved to the proximal end side of the liquid injection pipe 20. Then, grasp the handle 18 of the bag filter 16, lift the bag filter 16 upwards, and take it out through the opening 5. Incidentally, when installing the bag filter 16, the procedure described above is reversed. In this embodiment, the lid 6 can be easily opened by releasing the tightening and fixing mechanism 9, and the bag filter 16 can be removed upward by moving the nozzle sleeve 23. It is lightweight because it is not integrated with the liquid injection tube like the others, and it can be easily taken out by hand. Therefore, the bag filter 16 can be attached and detached in a very short time, making the work more efficient and, if the waste liquid is radioactive waste liquid, reducing the working time and greatly reducing the radiation dose to the workers. It is.

Note that the present invention is not limited to the above embodiment.

For example, the mechanism for tightening and fixing the lid is not necessarily limited to the one described above.

Note that the configuration of the movable liquid injection nozzle mechanism is not limited to the configuration of the above-mentioned embodiment. For example, the liquid injection pipe is provided so as to be rotatable in a horizontal plane, and the tip of the liquid injection pipe is placed above the bag filter during use. When the bag filter is removed, the distal end of the liquid injection tube may be positioned to the side of the bag filter.

Furthermore, the liquid injection nozzle mechanism may be composed only of a liquid injection pipe protruding into the filter tank, and the tip thereof may be located on the side of the bag filter.
Even with such a configuration, it is possible to directly supply the liquid to be filtered into the bag filter by devising the shape of the tip of the liquid injection tube.

As described in detail above, the bag filter device according to the present invention includes a filter tank having an opening at the upper end, a hinged lid that closes the opening of the filter tank and can be opened and closed, and a hinged lid that closes the opening of the filter tank. A fastening and fixing mechanism for fastening and fixing, a support wall that partitions the interior of the filter tank into an upper and lower part and is provided with a filter mounting hole, and a handle that is detachably attached to the filter mounting hole from above and is attached to the upper end for mounting the filter. The locking flange is provided with a locking flange that engages with the periphery of the hole from above, and the latching flange is formed on the periphery by rotating the locking flange by a predetermined amount while being engaged with the periphery. A baggage filter that engages with a locking part to prevent it from coming off upward, and a baggage filter that is disposed inside the filter tank by penetrating the side wall of the filter tank located above the support wall and is filtered from above the baggage filter into the baggage filter. The present invention is characterized in that it is equipped with a liquid injection nozzle mechanism that supplies liquid and whose tip is located on the side of the bag filter at least when the bag filter is attached or removed.

Therefore, since the liquid to be filtered is directly supplied into the bag filter, there will be no accumulation or clogging of solids within the device. Also, when attaching or removing the bug filter, open the hinged lid and rotate the bug filter a predetermined amount to disengage the locking flange from the locking portion on the periphery of the filter mounting hole. It is only necessary to lift the bag filter upward through the handle of the bag filter, and it can be attached and detached easily and in a short time. At this time, if the liquid injection nozzle mechanism is a sliding type, it is sufficient to retreat it to a position where it does not interfere with the lifting and lowering of the bag filter.
Also, if it is not a sliding type, you can leave it as is. In this way, the attachment/detachment work is extremely efficient, and if the liquid to be filtered is radioactive, it has great effects, such as reducing the worker's exposure to radiation by shortening the work time. .

[Brief explanation of the drawing]

1 and 2 are vertical sectional views of a conventional example. Moreover, FIGS. 3 to 5 show one embodiment of the present invention, and FIG. 3 is a longitudinal sectional view, FIG. 4 is a plan view, and FIG.
The figure is a longitudinal cross-sectional view of the bag filter in an attached and detached state. DESCRIPTION OF SYMBOLS 1... Filter tank, 3... Top plate, 5... Opening, 6... Lid, 7... Hinge, 9... Tightening fixing mechanism, 10... Bolt member, 11... Locking member, 14 ...Support plate, 15...Filter mounting hole,
16... Bag filter, 19... Moving liquid injection nozzle mechanism, 20... Liquid injection pipe, 23... Nozzle sleeve.

Claims (1)

[Scope of Claims] 1. A filter tank having an opening at the upper end, a hinged lid that closes the opening of the filter tank and can be opened and closed, and a fastening and fixing mechanism that fastens and fixes the hinged lid in a closed state. a support wall that partitions the interior of the filter tank into an upper and lower part and is provided with a filter mounting hole; The locking collar part is engaged with the locking part formed on the peripheral edge part by rotating the locking collar part by a predetermined amount while the locking collar part is engaged with the peripheral edge part. A baggage filter is arranged to pass through the side wall of the filter tank located above the support wall to supply the liquid to be filtered into the baggage filter from above the baggage filter. 1. A bug filter device comprising: a liquid injection nozzle mechanism whose tip is positioned to the side of the bug filter at least when the bug filter is attached or removed. 2. The liquid injection nozzle mechanism is provided with a liquid injection pipe protruding into the filter tank and a distal end of the liquid injection pipe so as to be slidable in the axial direction, and when liquid is poured, it moves above the bag filter. 2. The bag filter device according to claim 1, further comprising a nozzle sleeve that can be moved to the side of the bag filter along the liquid injection pipe when the bag filter is removed.