JP3406641B2 - Regeneration and cleaning equipment for cylindrical filters - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclaiming and cleaning method and apparatus for cleaning a cylindrical filter such as a ceramic filter to remove clogging and reclaim it.

[0002]

2. Description of the Related Art In a filtration device, filtration components are deposited on the surface of a filter element due to continuous use, and the filtration efficiency gradually decreases. Therefore, when a certain amount of deposit is reached, the deposit is once cleaned to remove the deposit on the filter surface, and then reused. By the way, although the deposit on the surface of the filter element as described above is relatively easy to clean, when clogging is caused by the filtered matter, the cleaning / removing work is relatively complicated.

As a method for cleaning and regenerating the filter element including the removal of the clogging, there are roughly the following three methods.

(1) Dirt is removed by immersing it in a chemical such as an acid or alkaline solution to hydrolyze the deposits and clogging substances.

(2) Secondary side of a backwashing filtration device using a washing liquid (water, chemical liquid) (the side from which the filtrate after filtration is output)
It is further injected and washed by pushing it to the primary side (liquid to be filtered side). That is, as opposed to the filtration, the cleaning liquid is passed through the filter to push out the filtered material and the clogging substance out of the filter.

(3) Washing with high-pressure wash water By spraying wash water with high pressure (primary side and secondary side of the filter), deposits, clogging substances, and dirt are removed.

[0007]

[Problems to be Solved by the Invention] However, looking at each of them, in (1), it takes time to disassemble and remove.

(2) is the most general and effective means,
For example, in the case of a cylindrical filter, the entire filter is not uniformly soiled and clogged, but there are variations, so the backwash water does not obstruct the flow, that is, it passes through the filter part with a small flow resistance, so it is the most clogged. , The heavily soiled part cannot be washed forever.

In (3), dirt and clogging on the surface of the filter can be removed, but clogging and dirt deep inside the filter cannot be removed.

Therefore, under the present circumstances, the above-mentioned three cleaning methods are used in combination depending on the condition of clogging and dirt, but especially the part where dirt and clogging is severe cannot be sufficiently removed even after spending time. .

For example, in the above-mentioned cylindrical filter, the end portion of the filter is easily clogged with dirt, and the middle portion is relatively small.

[0012] Even if this cylindrical filter is first treated by the method (1) and then backwashed by the method (2), the washing water is clogged and passes through the filter section with less dirt and less flow resistance. Therefore, there is a problem in that a portion that is clogged or heavily soiled cannot be completely washed.

In view of the above circumstances, the present invention is a cylindrical filter (ceramic filter, wire wound filter), which is a cylindrical filter for cleaning in a short time a portion where the clogging is not uniform and locally clogged. It is an object of the present invention to provide a reclaim cleaning method and a reclaim cleaning apparatus.

[0014]

In order to achieve the above object, the regenerating and cleaning apparatus for a cylindrical filter according to the present invention has a liquid passage between the secondary side and the primary side only at a predetermined portion of the cylindrical filter. Sealing means for allowing the seal to be allowed, supply means for supplying the cleaning liquid to the sealing space on the secondary side of the cylindrical filter at a predetermined pressure, and a predetermined liquid passage through the cylindrical filter. A sealing member that is movable in the longitudinal direction within the cylinder of the cylindrical filter; and the first sealing member. A second sealing member that is connected to the sealing member at a predetermined interval, and the first sealing member and the second sealing member each have the cylindrical filter prior to cleaning. The inner peripheral surface of the cylindrical filter closely adheres to the inner peripheral surface of the cylindrical filter before moving the sealing tool. And an elastic member which wear is released is provided.

Further, in the apparatus for regenerating and cleaning a cylindrical filter according to the present invention, a sealing means for sealing so that liquid passage between the secondary side and the primary side is allowed only at a predetermined portion of the cylindrical filter. A supply means for supplying the cleaning liquid to the secondary-side sealed space of the cylindrical filter at a predetermined pressure, and a moving means for arbitrarily changing and moving the liquid-permeable predetermined portion of the cylindrical filter. The sealing means is connected to the first sealing tool, which is movable in the longitudinal direction outside the cylinder of the cylindrical filter, at a predetermined distance from the first sealing tool. And a second sealing member, and the first sealing member and the second sealing member are in close contact with the outer peripheral surface of the cylinder of the cylindrical filter prior to cleaning, respectively. Is provided with an elastic member for releasing the close contact with the outer peripheral surface of the cylindrical filter of the cylindrical filter prior to its movement. And said that you are.

[0016]

According to the present invention having the above-described structure, the outside or inside of the cylindrical filter is sealed so that liquid is allowed to pass from the secondary side to the primary side only in a portion where the filter is dirty or clogged. When the cleaning liquid is stopped and the cleaning liquid is supplied to the sealed space on the secondary side at a predetermined pressure, the cleaning liquid only passes from the secondary side to the primary side only at the permissible passage positions. At this time, the cleaning liquid pushes to the primary side while hydrolyzing the dirt and clogging substances of the filter by the cleaning action at the same time when the cleaning liquid is passed. As a result, stains and clogging on the local part of the cylindrical filter are removed. Furthermore, the entire cylindrical filter can be cleaned by arbitrarily changing the liquid passage allowable portion.

[0017]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is an external view showing the overall construction of an apparatus suitable for one embodiment of the method for regenerating and cleaning a cylindrical filter according to the present invention,
FIG. 2 is a sectional view showing a structure for regenerating and cleaning the filter element shown in FIG.

The apparatus for regenerating and cleaning a cylindrical filter according to this embodiment is provided with a movable carriage 1 at an arbitrary position as shown in FIG. 1, and a mounting base for mounting a filter element 7 on the upper surface of the carriage 1. 6, a liquid pipe 4 for supplying the cleaning liquid into the cylinder of the filter element 7, a position adjusting unit 5 as a moving means for moving the liquid outlet of the liquid pipe 4 to a predetermined position in the filter cylinder, and the cleaning liquid. And a pump 2 for feeding the cleaning liquid in the liquid tank 3 to the liquid pipe 4 at a predetermined pressure. At the tip of the liquid pipe 4 which is moved to a predetermined position in the filter cylinder by the position adjusting section 5, as shown in FIG. 2, a cylindrical first sealing member having an outer diameter smaller than the inner diameter of the filter element 7 is formed. 8 and the second sealing member 9 are fixed at a predetermined distance. An elastic member 8a is provided on the outer circumference of the first sealing tool 8, and an elastic member 9a is also provided on the outer circumference of the second sealing tool 9. The elastic members 8a and 9a swell due to air supply and come into close contact with the inner peripheral surface of the filter cylinder, and have a structure like a floating ring. These elastic members 8a, 9
An air supply pipe 10 is provided in the first sealing member 8 and the second sealing member for supplying air to a, and the elastic members 8a and 9a are inflated by supplying air to the air supplying pipe 10. Has become. This prevents the leakage of the cleaning liquid and fixes the first sealing member 8 and the second sealing member 9 at predetermined positions in the cylinder of the filter element 7. On the other hand, the first sealing member 8 and the second sealing member 9 are also provided with an exhaust pipe 11 for contracting the elastic members 8a, 9a. Therefore, the elastic members 8a and 9a are reduced from the exhaust pipe 11, and the close contact with the inner peripheral surface of the filter by the first sealing member 8 and the second sealing member 9 is released, so that the next cleaning position is obtained. You can move quickly. Further, a liquid outlet 4a is provided between the first sealing member 8 and the second sealing member 9 of the liquid pipe 4, and the pump 2
The cleaning liquid delivered at a predetermined pressure is ejected from the liquid outlet 4a.

The filter element 7 is installed on the installation table 6
The upper frame 12 is placed on the lower frame 6a on the upper surface and is held by being pressed toward the lower frame 6a side from the upper frame 12 supported by the supporting portion 12a provided on the installation table 6. The upper frame 12 and the lower frame 6a have the same inner diameter and outer diameter as the cylindrical filter element 7, and their thickness is the same as the thickness of the first sealing tool 8 and the second sealing tool 9. Or more. this is,
This is because the thicknesses of the first sealing tool 8 and the second sealing tool 9 are considered. That is, the first sealing tool 8 and the second sealing tool 9
Since the area between and is the filter cleaning range, the position adjusting unit 5 adjusts the position of the liquid pipe 4 to filter the first sealing member 8 and the second sealing member 9 fixed to the liquid pipe 4. This is because the end portion of the filter element 7 cannot be washed unless the thickness of the first sealing member 8 or the second sealing member 9 is taken into consideration when the filter element 7 is moved to the end portion of the element 7. The filter element 7 may be held by any method as long as it does not seal the filter cleaning surface.

Next, the washing operation of the cylindrical filter in the apparatus having the above construction will be described. First, an operator places the filter element 7 on the lower frame 6a of the installation table 6 and presses the upper side of the upper frame 12 toward the lower frame 6a to install the filter element 7.

Next, the position adjusting section 5 adjusts and moves the position of the liquid pipe 4 in the axial direction of the filter to filter the first sealing member 8 and the second sealing member 9 fixed to the liquid pipe 4. The element 7 is fixed to a predetermined washing part.

Then, the air supply valve is opened to open the air supply pipe 1.
0 to the elastic member 8a of the first sealing tool 8 and the elastic member 9a of the second sealing tool 9 to inflate and expand the first sealing tool 8 and the second sealing tool 9. Seal inside the inner diameter of the filter between.

Subsequently, the cleaning liquid in the liquid tank 3 is pumped by the pump 2
Is sent out through the liquid pipe 4 at a predetermined pressure and jetted from the liquid outlet 4a. As a result, the cleaning liquid fills the inside diameter of the filter sealed between the first sealing member 8 and the second sealing member 9 and tries to pass through the eyes of the filter in the radial direction of the filter. That is, the cleaning liquid is pushed out to the primary side (liquid side to be filtered) while simultaneously hydrolyzing the dirt and clogging substances of the filter by the cleaning action while passing the liquid. This allows
The dirt and clogging on the local part of the cylindrical filter is removed.
For this reason, the clogging of the filter can be cleaned.

When the cleaning is completed, the exhaust valve is opened to exhaust air from the exhaust pipe 11 to contract the elastic member 8a of the first sealing tool 8 and the elastic member 9a of the second sealing tool 9, The seal between the first closure 8 and the second closure 9 is released.

Then, the first sealing member 8 and the second sealing member 9 together with the liquid pipe 4 are taken out from the inner diameter of the filter element 7, and the upper frame 12 is removed and replaced with another filter element.

Thus, the regeneration cleaning of the filter element is completed.

Next, another embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a cross-sectional view showing how filter elements are regenerated and cleaned in an apparatus suitable for another embodiment of the method for regenerating and cleaning a cylindrical filter of the present invention.

In the above-described embodiment, the sealing tool is provided inside the filter cylinder, but the present invention is not limited to this, and the sealing tool is provided outside the filter cylinder as shown in FIG. It may be a thing. The details will be described below.

As shown in FIG. 3, the cylindrical filter element 22 is mounted on a cylindrical lower frame 21a provided on the installation base 21 and having the same outer diameter as the filter, and the filter element 22 has an upper surface. Is an upper frame 2 similar to the lower frame 21a
It is pressed and held by 3. On the outer circumferences of the lower frame 21a, the filter element 22, and the upper frame 23, a first sealing member 24 and a second sealing member 25, which are separated by a predetermined distance via a connecting pipe 26, are provided in the longitudinal direction. It is movably supported by. The first sealing member 24 and the second sealing member 25 are tubular ones having an inner diameter slightly larger than the outer circumferences of the lower frame 21a, the filter element 22 and the upper frame 23. An elastic member 24a is provided on the inner peripheral surface of the first sealing member 24, and an elastic member 25a is also provided on the inner peripheral surface of the second sealing member 25. The elastic member 24a and the elastic member 25a are It expands due to air supply and comes into close contact with the outer circumference of the filter cylinder, and has a structure similar to a floating ring. In order to supply / exhaust the elastic members 24a, 25a, the first sealing member 2
A supply / exhaust pipe 27 is provided in the fourth and second sealing members 25, and the elastic members 24a and 25a are inflated by the supply of air to the supply / exhaust pipe 27, and are contracted by the exhaust. Further, a liquid pipe 28 for sending a cleaning liquid into the inner diameter of the filter element 22 at a predetermined pressure is arranged on the lower frame 21a side.

In order to regenerate and wash the filter element 22 with the above-described structure, first, as shown in FIG. 2A, an operator first connects the first sealing member 2 through the connecting pipe 26.
4 and the second sealing member 25, the filter element 2
Fix near the lower end of 2.

Then, the air supply valve is opened, air is supplied to the elastic members 24a and 25a through the air supply / exhaust pipe 27 to inflate them, and the elastic members 24a and 25a are then expanded.
To the outer periphery of the filter element 22. As a result, the outer periphery of the filter element 22 has the first sealing member 2
The state other than the gap between 4 and the second sealing member 25 is closed.

Subsequently, the cleaning liquid is sent out at a predetermined pressure into the inner diameter of the filter through the liquid pipe 28 by a pump (not shown). As a result, the liquid medicine tries to come out of the gap between the first sealing member 24 and the second sealing member 25 through the eyes of the filter in the filter outer diameter direction. That is, the cleaning liquid is pushed out to the primary side (liquid side to be filtered) while simultaneously hydrolyzing the dirt and clogging substances of the filter by the cleaning action while passing the liquid. As a result, stains and clogging on the local part of the cylindrical filter are removed. For this reason, the clogging of the filter can be cleaned.

When the cleaning is completed after that, the exhaust valve is opened, and the elastic member 8a of the first sealing member 8 and the elastic member 9a of the second sealing member 9 are contracted through the air supply / exhaust pipe 27 so as to be elastic. The sealing of the outer circumference of the filter by the member 24a and the elastic member 25a is released.

Then, as shown in FIG. 3 (b), the gap between the first sealing member 24 and the second sealing member 25 is moved to the center of the filter and washed in the same manner as described above. As shown in (c), the gap between the first sealing member 24 and the second sealing member 25 is moved to the vicinity of the upper end portion of the filter and cleaning is performed as described above.

In this way, the gap between the first sealing member 24 and the second sealing member 25 is moved to wash the entire filter element. Needless to say, the washing order may be arbitrary.

Next, the result of comparison between the cleaning method of the above-described embodiment and the conventional cleaning method will be described.

In this experiment, two cylindrical ceramic filters with similar stains were prepared as samples. Therefore,
The result of cleaning the cylindrical ceramic filter by the above-mentioned cleaning method for closing the filter locally, and the cylindrical ceramic filter was immersed in 20% HCL → Immersed in city water for 1 to 5 hours → End face inner surface high pressure water cleaning → City water cleaning → 0.2% NaOH backwash →
Table 1 shows a comparison with the result of the conventional cleaning method in which the outer surface was washed with high pressure water.

[0040]

[Table 1] When the air flow rate is Δp = 100 mmAq, the water flow resistance is 2500 l / m ² · hr, as shown in Table 1 above, the conventional method takes 216 hours for cleaning the filter. It can be seen that the method shortens to 15 minutes and the air flow rate and water flow resistance are reproduced as new.

Examples of the cylindrical filter element applied to the present invention described above include sintered metal filters such as ceramics and wound type filters.

As the cleaning liquid to be used, an acid is used when the substance that stains or clogs is an inorganic substance. Further, in the case of an organic substance such as protein, an alkaline solution is used.

[0043]

As described above, according to the present invention, the cylindrical filter is sealed outside or inside the cylinder at a position other than the permissible passage, and the secondary side of the cylindrical filter thus formed is sealed. By supplying the cleaning liquid from the space while applying a predetermined pressure, and by passing the dirty and clogged parts of the cylindrical filter, which is the permissible passage point, the dirt and clogged parts are concentrated. Can be washed. Further, by arbitrarily changing the passage-permitted portion, the entire cylindrical filter can be completely cleaned, and the regeneration cleaning can be performed in a short time.

[Brief description of drawings]

FIG. 1 is an external view showing an overall configuration of an apparatus suitable for an embodiment of a method for regenerating and cleaning a cylindrical filter of the present invention.

FIG. 2 is a cross-sectional view showing a structure for regenerating and cleaning the filter element shown in FIG.

FIG. 3 is a cross-sectional view showing how a filter element is regenerated and cleaned in an apparatus suitable for another embodiment of the method for regenerating and cleaning a cylindrical filter of the present invention.

[Explanation of symbols]

1 dolly 2 pumps 3 liquid tank 4, 28 liquid pipe 4a Liquid outlet 5 Position adjustment unit 6,21 Installation stand 6a, 21a lower frame 7,22 Filter element 8,24 First sealing tool 8a, 9a, 24a, 25a Elastic body 9,25 Second sealing tool 10 Air supply pipe 11 exhaust pipe 12,23 Upper frame 12a support part 26 Connection pipe 27 Air supply / exhaust pipe

Claims (2)

(57) [Claims] 1. Sealing means for sealing so as to allow liquid to pass between the secondary side and the primary side only at a predetermined position of the cylindrical filter, and a sealing for the secondary side of the cylindrical filter. Supply means for supplying the cleaning liquid to the stop space at a predetermined pressure, and a moving means for arbitrarily changing and moving a predetermined position through which the cylindrical filter can pass the liquid, the sealing means, A first sealing member that is movable in the longitudinal direction within the cylinder of the cylindrical filter; and a second sealing member that is connected to the first sealing member at a predetermined interval. The first sealing member and the second sealing member are in close contact with the inner peripheral surface of the cylinder of the cylindrical filter prior to cleaning, and the cylinder of the cylindrical filter prior to movement of the sealing member. Regeneration of a cylindrical filter characterized by being provided with an elastic member for releasing close contact with the inner peripheral surface Kiyoshi apparatus. 2. Sealing means for sealing so as to allow liquid to pass between the secondary side and the primary side only at a predetermined location of the cylindrical filter, and a sealing for the secondary side of the cylindrical filter. Supply means for supplying the cleaning liquid to the stop space at a predetermined pressure, and a moving means for arbitrarily changing and moving a predetermined position through which the cylindrical filter can pass the liquid, the sealing means, A first sealing member that is movable in the longitudinal direction outside the cylinder of the cylindrical filter; and a second sealing member that is connected to the first sealing member at a predetermined interval. The first sealing member and the second sealing member are in close contact with the cylindrical outer peripheral surface of the cylindrical filter prior to cleaning, and the cylindrical outer periphery of the cylindrical filter prior to movement of the sealing member. Regeneration of a cylindrical filter characterized by being provided with an elastic member for releasing the close contact with the surface Kiyoshi apparatus.