JPH0386205A - Liquid purifying device - Google Patents

Abstract

PURPOSE:To pulverize the foreign matter blocked by a tiny passage in a filter plate with a scraper plate and to force the foreign matter into the passage by providing the scraper plate sliding on the surface of the filter plate in the facial direction and directed in the direction crossing the filter plate. CONSTITUTION:The filter plate 21 having many tiny passages 20 communicating with both inner spaces is provided in the face separating the inner space communicating with the liq. inlet 7 side in hollow casings 2-4 and the inner space communicating with the liq. outlet 10 side. The scraper plate 17 is provided on the liq. inlet 7 side of the filter plate 21, directed in the direction crossing the filter plate 21, slid on the surface of the filter plate 21 or moved at a minute distance from the surface and relatively moved. The scraper plate 17 is arranged so that its one end and the other are shifted back and forth in the moving direction with respect to the filter plate 21. As a result, the foreign matter blocked by the tiny passage in the filter plate is pulverized and forced into the passage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid purification device, and particularly relates to a liquid purification device suitable for use in cooling water circulation systems of air conditioners, refrigerators, various industrial machines, etc. be.

"Prior Art" From the viewpoint of water resource protection, cooling water used for the above-mentioned purposes is generally used while being circulated in a closed cycle and repeatedly undergoing heat exchange with the atmosphere.

In other words, the cooling water that exchanged heat by passing through predetermined points in the various machines mentioned above comes into contact with the atmosphere by passing through a device called a cooling tower, and some of it is released into the atmosphere as water vapor, thereby cooling the water. It is then recovered and used again as cooling water.

"Problem to be Solved by the Invention" By the way, the above-mentioned cooling tower has a large contact area with the atmosphere due to its function of bringing cooling water into contact with the atmosphere and exchanging heat, so it is difficult to avoid dust floating in the atmosphere. It is unavoidable that foreign objects such as leaves, insects, etc. get mixed into the cooling water during heat exchange, and these foreign objects may clog the cooling water circulation system, impairing its cooling ability. Furthermore, as the cooling water passes through the cooling tower, carbon dioxide in the atmosphere gradually dissolves, which inevitably lowers its pH. Metal oxide scale may occur in the pipes of the water circulation system, and this scale may cause the same problems as the foreign matter.

Therefore, in a cooling water circulation system using a cooling tower, there is a problem in that the equipment must be periodically stopped to perform cleaning work to remove the various foreign substances and scales.

In view of the above-mentioned circumstances, the applicant first filed the patent application No. 2 in 1999.
In No. 5260 (filed on February 3, 1999), we proposed a "cooling water passage device." The present invention further improves the above-mentioned optical application, and aims to remove foreign substances from a cooling water circulation system equipped with a cooling tower, thereby increasing its operating rate and improving the ease of attaching it to piping. .

"Means for Solving the Problem" In order to achieve the above object, the invention as set forth in claim 1 of the present application provides a solution for the liquid flow in a hollow casing provided with a liquid inlet and a liquid outlet. A filter plate is provided in a plane that separates an internal space communicating with the inlet side and an internal space communicating with the liquid outlet side, and is provided with a large number of minute passages that communicate the circumferential internal spaces with each other. A scraping plate is provided on the liquid inlet side, which moves or slides relative to the surface of the filter plate with a small gap therebetween, and which is oriented in a direction intersecting the filter plate. The scraping plate is arranged such that one longitudinal end and the other end of the scraping plate are shifted from each other back and forth in the direction of relative movement with respect to the filter plate.

The invention set forth in claim 2 is the invention set forth in claim 1, wherein the casing and the filter plate have a cylindrical shape having the same axis as each other, and the scraping plate It is arranged along the radial direction and moves along the circumferential direction.

The invention set forth in claim 3 is the invention set forth in claim 2, wherein the filter plate is fixed to the casing, and the scraping plate is arranged on the outside of the filter plate with the same axis. The support frame is arranged so as to protrude in the radial direction of the filter plate, and one end and the other end along the direction parallel to the axis of the filter plate lie in a plane including the axis of the filter plate. On the other hand, the filter plates are arranged so as to be shifted back and forth along the circumferential direction of the filter plate.

The invention set forth in claim 4 is the invention set forth in claim 2, wherein the filter plate is fixed to the casing, and the scraping plate is aligned with the same axis inside the filter plate. A support frame is disposed on the outside of the support frame so as to protrude in the radial direction of the filter plate, and one end and the other end extending in a direction parallel to the axis of the filter plate lie in a plane including the axis of the filter plate. On the other hand, the filter plates are arranged so as to be shifted back and forth along the circumferential direction of the filter plate.

The invention set forth in claim 5 is the invention set forth in claims 3 and 4, wherein the scraping plate rotates together with the scraping plate to apply centrifugal force to the liquid inside. The impeller is fixed.

According to the structure of the invention described in claim 1, the liquid flowing from the liquid inlet to the liquid outlet passes through the fine passage of the filter plate, and foreign matter in the liquid is removed from the passage. Since the foreign matter cannot pass through the liquid inlet side of the filter plate, it adheres to the surface of the filter plate on the liquid inlet side.Then, the attached foreign matter collides with the scraping plate that moves in the direction of the surface of the filter plate, or by colliding with the scraping plate and the filter plate. The scraping plate is crushed with the surface of the plate and becomes fine, and can pass through the passage along with the liquid.Furthermore, since the scraping plate is provided at an angle with respect to the direction of movement, the filtering plate According to the configuration of the invention described in claims 2 to 4, in which the foreign matter on the surface is passed through by applying pressure in the direction of passing through the passage, the outer periphery of the cylindrical filter plate or By rotating the scraping plate on the inner periphery using a motor or the like, foreign matter adhering to the surface of the filter plate can be miniaturized.

According to the structure of the invention described in claim 5, kinetic energy is given to the liquid by the impeller provided integrally with the scraping plate, so that the liquid is absorbed by passing through the minute passages of the filter plate. Pressure loss is restored.

"Example" Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 4 show a first embodiment of the present invention.

As shown in Fig. 1, this purification device is composed of a motor 1 and lower, middle, and upper cylindrical parts 2, 3, and 4 coaxially fixed to the motor 1. ing. In addition, each of the cylindrical parts (hereinafter collectively referred to as a casing as necessary) 2, 3, and 4, as shown in FIG.
It is fixed integrally with the motor 1 by passing a bolt 5 fixed to the end of the motor I and tightening it with a nut 6.

A liquid inlet lower is provided to penetrate in the radial direction at the side of the lower cylindrical portion 2, and a pipe 8 forming a part of the cooling water circulation system is screwed into the liquid inlet lower. A liquid outlet 9 is provided tangentially through the side of the middle cylindrical part 3, and a liquid outlet 10 is provided axially through the upper part of the upper cylindrical part 4. ing. Note that these liquid outlet ports 9 and 10 are used selectively depending on the direction of the piping connected to the device, and the liquid outlet ports 9 and 10 on the side that are not used are sealed with a blind flange, a plug, or the like.

On the other hand, inside the lower cylindrical part 2, a drive shaft 11 of the motor l is provided.
protrudes, and the periphery of this drive shaft 11 is sealed by an oil seal 12, so that the liquid in the casing is transferred to the motor l.
It is designed to prevent intrusion into the interior. Further, a blade support I3 is fixed to the drive shaft 11. This blade support body 13 is composed of a flange portion 15 fixed to the drive shaft 11 with a nut 14, and a plurality of arms 16 included in a cylindrical surface having the same axis as the seven run portions 15. A plurality of (four in the illustrated example) 16 are provided at predetermined intervals in the circumferential direction. Further, a blade (scraping plate) 17 that protrudes inward in the radial direction of the cylindrical surface is fixed to each arm 16, and these blades 17 have one end (the upper end in FIG. 4) and the other end (the fourth (lower end in the figure) and are arranged so as to be shifted in the direction of movement (rotation direction indicated by the arrow in Fig. 4). That is, the blade 17 is inclined at an angle α with respect to a straight line parallel to the central axis of rotation (dashed line A in FIG. 4), and this angle α preferably ranges from 1 degree to several degrees. A small angle on the order of degrees is selected.

On the other hand, a flange portion 18 having an open center is provided at the bottom of the middle cylindrical portion 3.
A cylindrical body 19 having an outer diameter smaller than the cylindrical surface including the tip of the blade 17 is provided on the lower surface of the cylindrical body 19.
A large number of through holes 20 are formed in the housing to allow fluid to flow therethrough. Furthermore, a filtering net 21 wound around the outer periphery of the cylindrical body 19 is provided between the cylindrical body 19 and the blade 17, and the outer circumferential surface of the filtration net 21 forms a cylindrical shape including the tip of the blade 17. A slight gap (for example, 1 mm or less) is provided between the surface and the surface. The filtering net 21 connects the inside of the casing to a space that communicates with the liquid inflow lower.
It forms part of a surface that partitions a space that communicates with the liquid outlet 9, and these rain spaces are communicated with each other through the voids of the filtering net 21.

A liquid purification device having such a structure is installed in a pipe, for example, a cooling water pipe passing through a cooling tower, which runs from the cooling tower to the refrigerator. In this piping, foreign matter in the limbs that has flowed into the casing from the inlet 8 is captured by the filtration net 21, and only the liquid passes through, and at the same time, the foreign matter captured by the filtration net 21 moves around the blade 17. The particles are pulverized by the blades 17, and then forced radially inward by the inclinations provided on the blades 17 to pass through the filter net 21 and be circulated again. As long as the mesh of the filtering net 21 is made smaller than the inner diameter of the piping (particularly fine piping such as a heat exchanger),
In theory, there will be no blockage in the pipes. Furthermore, by repeating this process, various foreign substances that have entered the cooling tower that is open to the atmosphere are crushed into small pieces.
Sludge will accumulate at the bottom of the liquid retention section of the cooling tower. Therefore, by removing the sludge-like deposits when cleaning the cooling tower, the purifying device can be operated continuously without performing maintenance work such as replacing the filter net 21.

Next, FIG. 5 shows a second embodiment of the present invention, and in this embodiment, in order to recover the pressure corresponding to the pressure loss caused by providing a purifying device in the piping,
A method of providing a pump mechanism is adopted.

That is, in the embodiment, the drive shaft 11' of the motor l is extended to the upper part of the casing (inner space of the middle cylindrical part 3), and in this extended part, the drive shaft 11' passes through the filter net 21 and moves in the axial direction. Impeller 3 that applies centrifugal force to the fluid
0 is fixed, and as the impeller 30 rotates, the fluid within the casing is pushed out in the tangential direction of the middle cylindrical portion 3. In this case, in order to effectively utilize the pressure given by the impeller 30, a pipe is connected to the liquid outlet 9 provided in the tangential direction of the middle cylindrical part 3, and a pipe is connected to the liquid outlet 9 provided in the axial direction of the upper end cylindrical part 3. Needless to say, the liquid outflow port 10 that has been drained is closed.

In this way, by providing a pump mechanism within the purification device, even when the circulation pump of the existing cooling water circulation system via the cooling tower does not have sufficient pressure margin,
The purification device of the present application can be installed in a piping line. In addition, in a newly installed cooling water circulation system, if the required pressure is small, the cooling water is circulated using the pressure applied to the fluid from the pump mechanism built in the purification device,
It is also possible to omit the circulation pump.

Furthermore, FIG. 6 shows a third embodiment of the present invention.

In this embodiment, instead of rotating the blade around the outer periphery of the filtration net as in the first embodiment or the second embodiment, the filtration filter is installed inside the cylindrical body 16' provided at the middle cylindrical part 3°. A net 21' is provided, and a blade support 13' is further provided on this d-pass screen 21' so that the blade 17 can be rotated. In this case, the inside of the middle cylindrical part 3'' becomes the internal space on the side of the limb inlet (not shown), and the opening of the lower cylindrical part 2 becomes the liquid outflow lower part, and the first embodiment The connection is opposite to that of the example or second embodiment, and a flow as shown by the arrow in the figure occurs in the caning.

In this method of rotating the blades inside the filter net 21', the filter net 21' can be exposed to the outside by removing the upper cylindrical part 4 due to its structure. Example or second example (
(The filter net 21 is not exposed unless both the upper cylindrical part 4 and the middle cylindrical part 3 are removed.) The filter net 21'
Maintenance work such as replacement becomes easier.

In addition, in each of the above embodiments, a net was used as the a-pass plate, but instead of this net, a minute penetration part as shown in the fourth embodiment shown in FIG. 7 or the fifth embodiment shown in FIG. You may use a filter with That is, the filter plate 4 shown in FIG.
0 is attached to the cylindrical body 16 provided in the interrupted cylindrical part 3 in place of the filtering net 21 in each of the above embodiments, and has a structure in which a cylindrical main body 41 is provided with a large number of through holes 42. It becomes. Further, the filter plate 43 shown in FIG. 8 has a structure in which a large number of slits 45 are provided in the same cylindrical main body 44. Note that these filter plates 40 and 43 may, of course, not be attached to the cylindrical body 16, but may be formed by forming through holes or slits in the cylindrical body itself.

"Modified Examples" ■In each of the above embodiments, the filter plate was fixed and the blade (scraping plate) was moved. However, if the system were to move these relatively, the filter plate side could be moved or , and may be moved.

■The specific structure of the casing, such as its appearance, the divided structure of the lower, middle, and upper cylindrical parts, and the arrangement of the liquid inlet and liquid outlet are not limited to the above embodiments. Appropriate changes may be made without departing from the gist of the present invention.

■The smaller the gap between the scraping plate and the filter plate, the more fine the foreign particles can be, but this also increases the driving force (motor capacity). It is desirable to select the optimum gap depending on the contamination situation and the power supply conditions at the installation location. Moreover, it is of course possible to make the gap zero, in other words, to make the scraping plate and the filter plate slide.

■Since the scraping temporary and the filter plate move relative to each other with a small gap, they may sometimes come into contact with each other, or they may constantly be in contact and move relative to each other, so they may collide with foreign objects. Therefore, considering wear resistance, applying hard materials such as carbide metal or ceramic to the tip of the scraping plate and the surface of the filter plate is also effective in extending the life of the device. . Moreover, it is particularly effective when the scraping plate and the filter plate are made to slide. Furthermore, in consideration of maintainability, the side of the filter plate that is structurally easy to replace may be made of a relatively soft material.

"Effects of the Invention" As is clear from the above description, the configuration of the invention described in claims 1 to 5 of the present application provides the following effects.

B.a. Since the scraping plate moves on the surface of the filter plate on the liquid inlet side, it is possible to scrape off foreign substances that could not pass through the minute passages in the filter plate, making them more fine and pushing them out into the passages. .

Because the mouth and scraping plate are inclined with respect to the direction of movement,
As it moves, the foreign object can be forced into the passage.

C. If the filter plate and scraping plate are formed in the shape of a rotating body, the entire device will have a cylindrical shape similar to piping.
It can be easily attached without providing any special protrusion in the middle of the piping, and it can be easily moved relative to each other by rotating the two.

2. By providing an impeller that rotates together with the scraping plate, it is possible to recover the pressure loss in the piping caused by installing the equipment, so in existing equipment, there is no need to increase the load on circulation pumps, etc. It can also be installed,
In newly installed equipment, it can also function as a circulation pump.

E. Due to the above-mentioned effects, it is particularly suitable for use in cooling water circulation systems equipped with cooling towers, preventing foreign matter from clogging minute pipes in heat exchangers, preventing their failures, and increasing operating rates. can be increased.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a cross-sectional view including the axis, and
3 is a view taken along the line ■-■ in FIG. 2, FIG. 4 is a developed view of a cylindrical blade support, and FIG. 5 is a cross-sectional view including the axis of the second embodiment of the present invention. 6 is a cross-sectional view including the axis of the third embodiment of the present invention, FIG. 7 is a developed view of a filter plate applied to the fourth embodiment of the present invention, and FIG. FIG. 7 is a developed view of a filter plate applied to a fifth embodiment of the present invention. ! ...Motor, 2...Lower cylindrical part, 3
・3'...Middle cylindrical part, 4...Upper cylindrical part, 7...Liquid inlet, 10...Liquid outlet, 11/11 ' ・・・・・・Drive shaft, 13・1
3'...Blade support, 15...
Flange part, 16...Arm, 17...
・Blade (scraping plate), 19...Cylinder, 2
0...Through hole (passage), 21.2 bi...
・Filtering net (filtering plate), 30... Impeller, 40...
...Filter plate, 42...Through hole (passage), 4
3...filter plate, 45...slit (passage).

Claims (5)

[Claims] (1) In a plane that separates an internal space communicating with the liquid inlet side and an internal space communicating with the liquid outlet side in a hollow casing provided with a liquid inlet and a liquid outlet,
A filter plate having a large number of minute passages that communicate the two internal spaces with each other is provided, and a filter plate is provided on the liquid inlet side of the filter plate with a minute interval between it and the surface of the filter plate, or while sliding. A scraping plate is provided that moves relatively in the plane direction and is oriented in a direction intersecting the filter plate, the scraping plate comprising:
A liquid purification device characterized in that the liquid purification device is arranged such that one longitudinal end and the other end thereof are shifted from each other back and forth in the direction of relative movement with respect to the filter plate. (2) The casing and the filter plate have a cylindrical shape having the same axis as each other, and the scraping plate is provided along the radial direction of the filter plate and moves along the circumferential direction. A liquid purification device according to claim 1. (3) The filter plate is fixed to the casing, and the scraping plate is arranged so as to protrude in the radial direction of the filter plate inside a support frame arranged on the outside of the filter plate with the same axis line. At the same time, one end and the other end along the direction parallel to the axis of the filter plate are arranged with their positions shifted back and forth along the circumferential direction of the filter plate with respect to the plane including the axis of the filter plate. A liquid purification device according to claim 2, characterized in that: (4) The filter plate is fixed to the casing, and the scraping plate is arranged so as to protrude in the radial direction of the filter plate on the outside of a support frame arranged on the same axis inside the filter plate. At the same time, one end and the other end along the direction parallel to the axis of the filter plate are arranged with their positions shifted back and forth along the circumferential direction of the filter plate with respect to the plane including the axis of the filter plate. A liquid purification device according to claim 2, characterized in that: (5) An impeller is fixed to the scraping plate and rotates together with the scraping plate to apply a centrifugal force to the liquid inside the scraping plate. Liquid purification equipment.