JP4041588B2 - Filtration device - Google Patents

Description

[0001]
【Technical field】
The present invention relates Filtration apparatus for filtering processing of various water containing foreign substances (raw water) efficiently.
[0002]
[Prior art]
Conventionally, as a specific example of the filtration device, there is a filtration device described in JP-B-2-18890. As shown in FIG. 4 of the present application, this conventional filtration device is provided with a substantially cylindrical filtration element 93 in a casing 92 having a raw water inflow pipe 90 and a drain pipe 91. A treated water discharge pipe 94 is connected to the bottom. The raw water inflow pipe 90 is provided so that the raw water flows from the upper part of the casing 92 into the tangential direction of the casing 92.
[0003]
According to the filtration device having such a configuration, the raw water flowing into the casing 92 from the raw water inflow pipe 90 becomes a spiral flow that swirls around the filtration element 93, and this raw water is in contact with the outer peripheral surface of the filtration element 93. The raw water is filtered through the numerous through holes 93a of the filter element 93. The filtered treated water is discharged to the outside through the treated water discharge pipe 94. Therefore, the raw water can be continuously filtered.
[0004]
[Problems to be solved by the invention]
However, the conventional filtration device has the following problems.
[0005]
That is, conventionally, since the spiral flow of the raw water traveling from the upper part to the lower part of the filter element 93 is generated and this spiral flow is brought into contact with the outer peripheral surface of the filter element 93, it is included in the spiral flow of the raw water. The various foreign substances in contact with the outer peripheral surface of the filter element 93 indiscriminately regardless of the size or specific gravity. Therefore, it is more the degree of contact between the foreign matter against the filter element 93. In particular, in the past, a spiral flow of raw water is generated around the outer periphery of the filter element 93. However, when such a spiral flow of raw water is generated, a special feature is that foreign substances tend to collect at the center of the spiral flow. Since the phenomenon is observed, the degree of contact of foreign matter with the outer peripheral surface of the filter element 93 is further increased. Therefore, conventionally, foreign matter in the raw water is likely to be clogged in the through-hole 93a of the filter element 93, resulting in a problem that the filtration efficiency of the filtration device is reduced in a short time. In addition, it is necessary to frequently perform the cleaning operation of the clogged filter element 93, which is troublesome.
[0006]
The present invention has been conceived under such circumstances, so that the raw water can be filtered continuously and efficiently without easily clogging the filter element. The task is to do.
[0007]
DISCLOSURE OF THE INVENTION
In order to solve the above problems, the present invention takes the following technical means.
[0012]
The filtration device provided by the present invention has a cylindrical filtration element having a large number of through holes in the peripheral surface portion, and is provided inside in a posture in which the filtration element is erected substantially vertically. A casing forming a raw water inflow chamber below, a raw water inlet for allowing the raw water to flow into the raw water inflow chamber from the outside of the casing in the tangential direction of the peripheral wall of the raw water inflow chamber, and the raw water inflow chamber A treated water discharge port for discharging treated water obtained by passing raw water that has traveled inside the filtration element through the plurality of through holes to the outside of the casing; Below the raw water inflow chamber, there is provided a bottom water storage chamber capable of storing a part of the raw water that has flowed into the raw water inflow chamber, and the bottom water storage chamber has an open / close bar. Is provided with a drainage pipe with a blanking and A the water inlet chamber and the bottom water chamber, characterized in that it is partitioned via the partition plate having an opening hole at a substantially central portion.
[0013]
In Filtration apparatus of the present invention, by introducing the raw water from the inlet raw water flow into the raw water inflow chamber in the casing, satisfies the raw water appropriate amount in the respective sections of the casing, the tangent of the peripheral wall portion of the raw water is the water inlet chamber By making it flow in the direction, it can be made a spiral flow, and the spiral flow of the raw water generated in the raw water inflow chamber can be advanced from below the filter element toward the inside of the filter element. And if the raw | natural water which progressed toward the inner side of the said filtration element passes through the through-hole of the surrounding surface part of the said filter element and is filtered, the treated water will be discharged | emitted outside the casing through a treated water discharge port. It will be. Thus, if the above filtration device is used, it is possible to prevent the foreign matter having a large specific gravity contained in the raw water from rising from the raw water inflow chamber toward the inside of the filtration element, and to filter the other foreign matters. It is possible to reduce the degree of contact of the foreign matter with the peripheral surface portion of the filter element by collecting it at the central portion of the spiral flow of the raw water traveling inside the element. Furthermore, clogging of the filtration element can be prevented by the spiral flow of the raw water, and continuous filtration treatment of the raw water can be performed efficiently by preventing the clogging of the filtration element as much as possible. .
[0015]
In addition, foreign substances with large specific gravity contained in the raw water flowing into the raw water inflow chamber are allowed to flow from the raw water inflow chamber into the bottom water storage chamber below the raw water inflow chamber, so that the large specific gravity can be mixed into the spiral flow of the raw water and filtered. It is possible to suppress inadvertently flowing into the inside of the element. In addition, when the amount of foreign matter flowing into the bottom water storage chamber increases, the foreign matter can be easily discharged from the drain pipe to the outside of the casing by opening the open / close valve. Easy to do.
[0017]
Furthermore, since the raw water inflow chamber and the bottom water storage chamber can be partitioned via a partition plate, foreign matter flowing into the bottom water storage chamber passes through the raw water inflow chamber and reaches the inside of the filtration element. Can be more appropriately suppressed. On the other hand, since an opening hole is provided in the substantially central portion of the partition plate, foreign matter having a large specific gravity can be appropriately flowed from the raw water inflow chamber into the bottom water storage chamber through the opening hole.
[0018]
In another preferred embodiment of the present invention, an upper water storage chamber is provided above the filtration element in the casing so as to be able to store a part of raw water that has passed through the inside of the filtration element. At the same time, a drainage pipe having an open / close valve is provided in the upper water storage chamber.
[0019]
According to such a configuration, it is possible to store the water passing through the inside of the filter element in the upper reservoir chamber provided above the filtration element to the upper reservoir chamber, raw water swirling flow Of foreign matter collected at the center of the can be suspended. If foreign matter is suspended in the upper water storage chamber in this manner, the foreign matter can be prevented from coming into contact with the peripheral surface portion of the filtration element, and clogging can be further prevented from occurring in the filtration element. Further, when the amount of foreign matter floating in the upper water storage chamber increases, the foreign matter can be appropriately taken out together with the raw water in the upper water storage chamber through the drain pipe by opening the open / close valve. .
[0020]
In another preferred embodiment of the present invention, the peripheral wall portion of the casing is provided with one or a plurality of cleaning water injection nozzles for injecting cleaning water to the peripheral surface portion of the filtration element, and the upper portion of the casing. Is provided with a driving means for rotating the filtration element around its axis.
[0021]
According to such a configuration, even if the filter element is clogged, the cleaning water is ejected from the cleaning water jet nozzle to the peripheral surface portion of the filter element while rotating the filter element around its axis by the driving means. By spraying, the peripheral surface portion of the filter element can be washed and the clogged state can be appropriately eliminated. Therefore, it is more preferable in improving the raw water filtration efficiency. Further, such a cleaning process of the filter element can be performed during the raw water filtering process, and it is not necessary to interrupt the raw water filtering process for the filtering element cleaning process. . Furthermore, since the drive means for rotating the filtration element is provided in the upper part of the casing, the size of the entire apparatus in the width direction can be prevented from being bulky. In addition, as a specific mechanism for rotating the filter element, a structure in which the driving means provided on the upper part of the casing and the filter element are directly connected via an appropriate connecting member may be used. Can be made simple.
[0022]
Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be specifically described with reference to the drawings.
[0024]
FIG. 1 is a cross-sectional view showing an example of a filtration device according to the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
[0025]
In FIG. 1, the filtration device A includes a casing 1, a filtration element 2, a drive mechanism 4 for rotating the filtration element 2, a plurality of washing water injection nozzles 3, and other parts described later. Yes.
[0026]
The casing 1 is made of, for example, stainless steel having an excellent rust prevention property, and is configured by connecting a plurality of casing bodies 10a to 10d in series in the vertical direction (vertical direction). The plurality of casing main bodies 10 a to 10 d have a plurality of substantially cylindrical shapes or bottomed substantially cylindrical shapes having flange portions that can be connected to each other via a plurality of bolts 11. Inside the casing 1, an upper water storage chamber 12, a treated water discharge chamber 13, a raw water inflow chamber 14, and a bottom water storage chamber 15 are formed.
[0027]
The raw water inflow chamber 14 is formed inside the casing body 10 c and is located below the filter element 2. A raw water inlet 5 </ b> A is provided in the substantially cylindrical peripheral wall portion 14 a of the raw water inflow chamber 14. The raw water inlet 5A corresponds to the front end opening of the pipe body 50 attached to the casing body 10c. The pipe body 50 has the other end of the raw water supply pipe 70 connected at one end to the storage tank 7. Is connected. The raw water supply pipe 70 is provided with a pump P, and the raw water in the storage tank 7 is supplied to the raw water inlet 5A by the discharge pressure of the pump P. As clearly shown in FIG. 2, the pipe body 50 is provided so that the axial length direction thereof extends in the tangential direction of the peripheral wall portion 14 a, and the raw water inlet 5 </ b> A is a central portion of the raw water inflow chamber 14. Is provided at a position where the peripheral wall portion 14a is biased so as not to face each other. For this reason, the raw water W that has flowed into the raw water inflow chamber 14 from the raw water inlet 5A becomes a spiral flow that swirls along the inner surface of the peripheral wall portion 14a of the raw water inflow chamber 14.
[0028]
In FIG. 1, the bottom water storage chamber 15 is formed inside a bottomed casing body 10 d and is located below the raw water inflow chamber 14. A drain pipe 61 having an opening / closing valve 60 is connected to the bottom of the bottom water storage chamber 15 . The on-off valve 60 is an on-off valve that can be opened and closed by remote operation. However, it may be a manually operated valve. This also applies to other off valve 66 and the air vent valve 68 which will be described later. The bottom water storage chamber 15 is partitioned from the raw water inflow chamber 14 via a partition plate 62 fixedly attached to the casing 1. However, the partition plate 62 has a hollow disc shape with an opening hole 63 as a through hole formed in a substantially central portion thereof, and the bottom water storage chamber 15 and the raw water inflow chamber 14 are mutually connected via the opening hole 63. Communicate.
[0029]
The treated water discharge chamber 13 is formed in the outer periphery of the filtration element 2 in the casing body 10b. The treated water discharge chamber 13 is a chamber for temporarily storing the water (treated water) filtered by the filter element 2, and the upper water storage chamber 12 and the raw water through the two partition plates 64 and 65. The inflow chamber 14 is partitioned. A treated water discharge port 5 </ b> B is provided in the peripheral wall portion of the treated water discharge chamber 13. The treated water discharge port 5B corresponds to the front end opening of the pipe 51 attached to the casing body 10b.
[0030]
The upper water storage chamber 12 is formed inside the casing body 10 a and is located above the filtration element 2. A drain pipe 67 having an open / close valve 66 is connected to the vicinity of the bottom of the peripheral wall of the upper water storage chamber 12. The upper part of the upper water storage chamber 12 is sealed with a lid 16. However, the lid 16 is provided with an air vent valve 68. When the air vent valve 68 is in a closed state, the inside of the casing 1 can be set in a sealed or substantially sealed state. ing. When the air vent valve 68 is in the open state, the sealed or substantially sealed state in the casing 1 is released. This is quick when the raw water W in the casing 1 is discharged to the outside. It is suitable for making it carry out.
[0031]
The filtration element 2 is preferably made of a material excellent in rust prevention such as stainless steel, and is formed in a substantially cylindrical shape having a smaller diameter than the casing 1. A large number of through holes 20 are formed in the whole or a part of the peripheral surface portion of the filter element 2. These many through-holes 20 are holes penetrating in the thickness direction of the peripheral surface portion of the casing 1 and have a diameter of, for example, about several millimeters. The filtration element 2 is provided in a posture that stands substantially vertically inside the casing body 10 b, and an inner region 21 of the filtration element 2 communicates with the raw water inflow chamber 14 and the upper water storage chamber 12. ing. The filter element 2 is slidable with respect to the partition plates 64 and 65 so as to be able to rotate around its axis.
[0032]
The drive mechanism 4 includes a motor M attached to the upper portion of the casing 1, more strictly, the upper surface portion of the lid body 16, and a plurality of drive shafts connecting the motor M drive shaft and the upper portion of the filter element 2. The connecting members 40 and 41 are provided. The connecting member 40 is a cylindrical member that is fitted and connected to the upper part of the filtration element 2. On the other hand, the connecting member 41 is an arm-like member that can cause the raw water that has traveled above the connecting member 40 to flow into each part in the upper water storage chamber 12. The drive mechanism 4 operates to rotate the filter element 2 around its axis by driving the motor M. However, preferably, as shown in FIG. 3, the rotation direction N <b> 1 of the filtration element 2 is set to be opposite to the spiral direction N <b> 2 of the raw water W. More preferably, the motor M is configured to be driven for a predetermined time every predetermined time set in advance by a timer setting device (not shown).
[0033]
In FIG. 1, the plurality of cleaning water injection nozzles 3 inject cleaning water supplied at a constant water pressure via a pipe 30, and the cleaning water is directed toward the outer peripheral surface of the peripheral surface portion of the filter element 2. Is attached to the peripheral wall portion of the casing 1. Preferably, the plurality of washing water injection nozzles 3 are configured so that the washing water can be jetted toward the filtration element 2 in conjunction with the motor M only when the filtration element 2 is rotated by driving the motor M. Has been. As the washing water, tap water or treated water obtained by the filtering device A can be used.
[0034]
Next, a method for filtering the raw water W using the filtration device A will be described.
[0035]
First, the raw water W is continuously introduced into the raw water inflow chamber 14. As described in FIG. 2, the raw water W that has flowed into the raw water inflow chamber 14 from the raw water inlet 5 </ b> A becomes a spiral flow swirling in a certain direction. This spiral flow can be continuously generated even when the casing 1 is filled with the raw water W, and the spiral flow can be generated also in the inner region 21 of the filtration element 2. That is, in the filtering device A, the spiral flow of the raw water W generated in the raw water inflow chamber 14 can be advanced into the inner region 21 of the filtration element 2, whereby the raw water W is continuously supplied by the filtration element 2. And can be filtered.
[0036]
However, the foreign matter m1 having a large specific gravity such as a metal piece, stone, ceramic, or other solid matter contained in the raw water W can be settled at the bottom of the raw water inflow chamber 14. Moreover, if the raw water W is made into a spiral flow, it is possible to collect foreign substances contained in the raw water W in the center of the spiral flow. For this reason, the foreign matter m1 having a large specific gravity can be caused to flow into the bottom water storage chamber 15 through the opening hole 63 in the substantially central portion of the partition plate 62. Therefore, the raw water W flowing into the inner region 21 of the filter element 2 can be prevented from containing the foreign matter m1 having a large specific gravity, and the filtration processing load of the filter element 2 can be reduced by that much. . The raw water stored in the bottom reservoir 15 is also swirled under the influence of the water flow in the bottom reservoir 15, but the bottom reservoir 15 and the raw water inflow chamber 14 are partitioned by a partition plate 62. Therefore, the foreign matter m1 that has flowed into the bottom water storage chamber 15 is prevented from re-floating into the raw water inflow chamber 14 as much as possible.
[0037]
When a spiral flow of the raw water W is generated in the inner region 21 of the filtration element 2, foreign matters remaining in the raw water W can be gathered together at the central portion of the spiral flow. Therefore, foreign matter in the raw water W can be prevented from contacting the inner peripheral surface of the peripheral surface portion of the filter element 2 as much as possible. As a result, the through hole 20 of the filter element 2 can be prevented from being clogged, and the raw water W can be filtered efficiently by the filter element 2. Further, since a spiral flow (high-speed flow) of raw water that does not contain a large amount of foreign substances acts on the inner peripheral surface of the peripheral surface portion of the filtration element 2, this spiral flow enters the through hole 20 of the filtration element 2. This also exhibits the effect of peeling and removing foreign substances from the filter element 2, which can further prevent clogging of the filter element 2. The treated water filtered through the through-hole 20 of the filtration element 2 is continuously discharged outside through the treated water discharge chamber 13 and the treated water discharge port 5B, and is sent to a desired position.
[0038]
The foreign matter m2 having a small specific gravity contained in the raw water W that has flowed into the inner region 21 of the filtration element 2 can flow into the upper water storage chamber 12 above the filtration element 2. Accordingly, the foreign matter m2 having a small specific gravity can be sequentially accumulated in the upper water storage chamber 12 so that the foreign matter m2 is not lowered again into the inner region 21 of the filter element 2 and clogged in the through hole 20. be able to. When the foreign matter m2 flows into the outer peripheral portion of the cylindrical connecting member 40, the connecting member 40 can prevent the foreign matter m2 from flowing into the inner region 21 of the filtration element 2 again.
[0039]
When the accumulation amount of the foreign matter m2 in the upper water storage chamber 12 increases and the accumulation amount of the foreign matter m1 in the bottom water storage chamber 15 increases, the open / close valve 66 and the open / close valve 60 may be opened. Thereby, the foreign matter m2 in the upper water storage chamber 12 can be easily taken out together with a small amount of raw water through the drain pipe 67. Similarly, the foreign matter m1 in the bottom water storage chamber 15 can be easily taken out through the drain pipe 61.
[0040]
According to the above filtration method, the filter element 2 can be prevented from being clogged as much as possible. However, when the filtration process is performed for a long time, the filter element 2 may be clogged to some extent. For this reason, in the said filtration apparatus A, while driving the motor M and rotating the filtration element 2, washing water is injected from the some washing water injection nozzle 3 to the surrounding surface part of this filtration element 2, and the washing process is performed. . This cleaning process can be performed regularly or irregularly while the raw water W is being filtered. While the raw water W is being filtered, there is treated water in the treated water discharge chamber 13 between the plurality of washing water jet nozzles 3 and the filtering element 2, but the washing water has a water flow having a constant pressure. It collides with the outer periphery of the peripheral surface portion of the filter element 2. Accordingly, the foreign matter that has entered the through-hole 20 of the filtration element 2 and caused a clogged state is forcibly pushed back to the inner region 21 of the filtration element 2 by the water flow, so that the filtration element 2 is clogged. Is resolved. Since the filtration element 2 rotates, the cleaning water can be efficiently injected over the entire circumference of the peripheral surface portion, and the entire clogging of the filtration element 2 can be eliminated. Furthermore, as shown in FIG. 3, when the rotation direction N1 of the filtration element 2 is set in the direction opposite to the spiral direction N2 of the raw water W, the relative flow velocity of the spiral flow of the raw water W with respect to the peripheral surface portion of the filtration element 2 Can be faster. Therefore, the effect of eliminating the clogged state of the filter element 2 can also be expected by increasing the relative flow speed of the spiral flow of the raw water W.
[0041]
Specific configuration of the engaging Ru Filtration apparatus to the present invention is not limited to the embodiments described above.
[0042]
In the present invention, the type of raw water is not particularly limited, and various industrial effluents, sewage and other household / life effluents, mud and other snow-melting water containing foreign matter, water used in pools and public baths, etc. It can apply to the filtration treatment use of water.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a filtration device according to the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is a cross-sectional view taken along the line III-III in FIG.
FIG. 4 is an explanatory view showing an example of a conventional filtration device.
[Explanation of symbols]
A Filtration device W Raw water m1, m2 Foreign matter M Motor 1 Casing 2 Filtration element 3 Washing water injection nozzle 4 Drive mechanism 5A Raw water inlet 5B Treated water outlet 12 Upper water storage chamber 13 Treated water discharge chamber 14 Raw water inflow chamber 15 Bottom water storage chamber 20 Through hole 21 Inner region (of the filtration element)
60 Opening / closing valve 61 Drain discharge pipe 66 Opening / closing valve 67 Drainage pipe

Claims (3)

A cylindrical filtration element having a large number of through holes in the peripheral surface portion;
A casing in which the filtration element is provided in a vertically upright posture, and a raw water inflow chamber is formed below the filtration element;
A raw water inlet for flowing raw water into the raw water inflow chamber from the outside of the casing in the tangential direction of the peripheral wall portion of the raw water inflow chamber;
A treated water discharge port for discharging treated water obtained by passing raw water that has progressed from the raw water inflow chamber to the inside of the filtration element through the plurality of through holes to the outside of the casing;
It has
Below the raw water inflow chamber in the casing is provided a bottom water storage chamber that can store a part of the raw water that has flowed into the raw water inflow chamber, and an open / close valve is provided in the bottom water storage chamber. A drainage pipe is provided, and
The filtration device, wherein the raw water inflow chamber and the bottom water storage chamber are partitioned through a partition plate having an opening hole in a substantially central portion . Above the filter element in the casing is provided with an upper water storage chamber capable of storing a part of raw water that has passed through the inside of the filter element, and an open / close valve is provided in the upper water storage chamber. The filtration apparatus according to claim 1, wherein a drainage pipe comprising The peripheral wall portion of the casing is provided with one or a plurality of cleaning water injection nozzles for injecting cleaning water to the peripheral surface portion of the filtration element. The upper portion of the casing has the filtration element around its axis. driving means for rotating is provided in the filtration device according to claim 1 or 2.

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