JP2003284906A - Filter machine and filter apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the point at issue that an oil component adheres to the inner wall of the confluent sewer of a confluent type sewerage and a part of the adhered oil is peeled when confluent sewerage flows to become oil lumps and these oil lumps flow down along with the confluent sewage to be fixed to the filter medium of the filter machine for filtering the flooding water of the confluent type sewerage. <P>SOLUTION: In the filter machine 1 having annular filters 9 provided thereto in a freely rotatable manner, each of the filters has a metal film, a ceramic film and/or a heat-resistant resin film, and the fluid 7D ejected from the nozzle 7C of a washing apparatus 7 is steam and/or hot water. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter and a filtering device for solid-liquid separation, and more particularly to a filter and a filtering device for solid-liquid separation of overflow water of a combined sewer. is there.

Sewer systems are roughly classified into a split type and a confluent type. In the split sewer system, rainwater and sewage flow through separate pipes.Rainwater is discharged into the river or sea through the rainwater pipe, and sewage flows into the sewage treatment plant through the sewage pipe, and after treatment into the river or sea. To be released.

In the combined sewer system, rainwater and sewage flow through the same pipe, and FIG. 11 is a flow chart showing an example thereof. An example of the combined sewer system will be described below with reference to FIG. The rainwater from the rainwater basin 101 and the sewage from the sewage source 102 flow into the confluent sewer pipe 103 to become the confluent sewage 111, which then flows into the rainwater discharge chamber 104 having the overflow weir 104A.
Normally, the combined wastewater 111 does not pass through the overflow weir 104A, flows into the sewage treatment plant 106 through the treatment plant inflow pipe 105, and after treatment, is discharged to the river or the sea through the treated water discharge pipe 107. The upper limit of the amount of water that can flow into the treatment plant inflow pipe 105 is set by the height of the overflow weir 104A, and when the amount of water increases due to heavy rain or the like and exceeds the upper limit, the excess amount exceeds the overflow weir 104A. Overflowing water becomes overflowed water, which does not flow into the sewage treatment plant and is discharged directly to the river or the sea through the discharge pipe 110. However, if the overflow water is discharged directly to the river or the sea in this way, it pollutes the river or the sea.
Recently, a filter (not shown) is provided in the middle of the discharge pipe 110, and overflow water is caused to flow into the filter to remove foreign matters.
Often released.

There are various types of filters, for example, International Application No. PCT / SE98 / 02294 discloses a filter in which a liquid containing solids is supplied from one end of a drum. The filter will be described with reference to the drawings. FIG. 12 is a perspective view of the filter and the tank, with the tank cut away to show the filter. 13 is a side sectional view of the filter, which is a sectional view taken along line FF of FIG. 14 described later. FIG. 14 shows EE of FIG.
FIG.

Drum 902, annular filter 909, gutter 9
03 and a cleaning device 907, a filter 901 has a tank 98.
It is installed at 0. Drum 902 and annular filter 909
Is rotatably provided around a horizontal axis A, and the gutter 903 and the cleaning device 907 are fixedly provided. The filter chamber 911 (FIG. 13) of the annular filter 909 has a holding frame 931 (FIG. 14) on the outer periphery and a filter segment 920 (FIG. 1) having microfilter cloth 921 on both side surfaces.
4), the inner peripheral portion is surrounded by the drum 902, and the drum 902 is passed through the opening 904 of the inner peripheral drum 902.
Is in communication with.

In the non-rotating state, the liquid 905 containing the solid content flowing into the drum 902 enters the filter chamber 911 through the opening 904, and is filtered by the micro filter cloth 921 of the filter segment 920, so that the liquid content is contained in the micro filter cloth. After passing through 921 and being stored in the tank 980, it flows out to the outside of the tank 980, and the solid content is removed by the microfilter cloth 9
It is captured in the lower part of 21 and remains in the filter chamber 911. Thus, the path through which the liquid 905 passes from the drum 902 through the filter chamber 911 and the micro filter cloth 921 forms a liquid conduit 906.

When the amount of solids trapped in the micro filter cloth 921 below the annular filter 909 increases and the micro filter cloth 921 becomes clogged, the drum 902 and the annular filter 909 fixed to this rotate. Then, the solid content captured by the micro filter cloth 921 moves from the lower part to the upper part by the rotation, and is separated by the water sprayed from the cleaning device 907 installed in the upper part, and the clogging state is eliminated. The solid component separated from the water is received by the gutter 903 and discharged. Hereinafter, in this specification, spraying a fluid (for example, water) to the solid component captured by the filter to remove the solid component to eliminate the clogging state is referred to as “cleaning”.

The filtering machine 901 has an advantage that the filtering area can be increased and the cleaning can be easily performed by the water sprayed from the cleaning device 907.

By the way, the sewage of the sewer contains oil, and the oil adheres to the inner wall of the confluent sewer pipe of the confluent sewer. When the confluent sewer flows, part of the adhered oil is peeled off. Then, it becomes an oil lump and flows down together with the combined sewage, and this phenomenon becomes more remarkable as the amount of water increases. The oil lump in the overflow water that is not treated in the sewage treatment plant flows into the filter 901 and is captured by the micro filter cloth 921. Overflow water occurs in the combined sewer system when the amount of water increases due to heavy rain, etc. In such a case, as described above, the phenomenon that the oil lumps flow down together with the combined sewer system becomes remarkable, and flows into the filter 901. The amount of oil spilled on the microfilter cloth 921 also increases. The oil lump is strongly captured by the microfilter cloth 921, and further solid components other than the oil lump captured by the microfilter cloth 921 are also more strongly captured when the oil content of the oil lump adheres, and the water jetted from the cleaning device 907 is There is a problem that the cleaning is not sufficiently performed. Such a phenomenon becomes more remarkable as the temperature is lower.

In addition to the sewer, when wastewater containing a large amount of oil flows into the filter 901, the microfilter cloth 92
By solidifying the oil adhering to (or containing) the solid content captured by No. 1, the solid content is strongly captured by the microfilter cloth 921, and the water sprayed from the cleaning device 907 performs sufficient cleaning. There was a problem of disappearing.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a filter and a filter device that can easily filter a liquid containing oil. In particular, it is an object of the present invention to provide a filter and a filter device that can easily filter the overflow water of the combined sewer containing the oil lump.

[0012]

As a result of various studies, the present inventors have accomplished the present invention by solving the above problems by using the following filter and filter device. According to a first aspect of the present invention, in a filter for filtering a liquid with a rotatably provided filter, a cleaning device for injecting a high-temperature fluid to the filter is provided, and the material of the filter has heat resistance. It is a filter characterized by.

The invention of claim 2 is the filter of the invention of claim 1, wherein the cleaning device injects steam and / or hot water.

The invention according to claim 3 is the filter according to claim 1 or 2, wherein the filter has a metal film, a ceramic film and / or a heat resistant resin film.

The invention according to claim 4 is the filter according to any one of claims 1 to 3, which is used for filtering the overflow water of the combined sewer system.

A fifth aspect of the present invention is a filtration device in which the filter according to the first to fourth aspects of the invention is attached to a tank.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. <Embodiment> FIG. 1 is a perspective view of a filtration device 100 of the present embodiment, in which the inflow direction of the liquid 5 is from right to left in the drawing,
The basin 80 is shown broken away to show the filter 1 visible, the upper half of the open end of the drum 2 (discussed below), the upper half of the filter segment 20 on the most open end side, the spokes 43 therein and the most open end. The lower part of the side branch pipe 7B and the nozzle 7C attached thereto are not shown so that the inside of the annular filter 9 can be seen, and the open end support part 62, the closed end support part 73 and the drive part 78 are not shown. is doing. FIG. 2 shows the filtration device 10 viewed from the inflow side of the liquid 5.
It is a front view of 0. 3 is a sectional view taken along the line AA of FIG.
The closed end support portion 73 and the drive portion 78 are not shown in cross section, and the filter 1 shows only the gutter 3 portion in cross section. FIG. 4 shows the drum 2,
It is a front view which shows the holding frame 31, the spokes 43, and the space 9a. FIG. 5 is a sectional view taken along line BB of FIG. FIG. 6 is a front view showing the filter segment 20. FIG. 7 shows FIG.
FIG. 6 is a front view showing a state in which the filter segment 20 is attached to the spokes 43 (in detail, a state in which FIG. 4 is rotated by 20 degrees), the gutter 3 and the nozzle 7C.
It is the figure which abbreviate | omitted illustration of the ring 2D and the dam plate 2B. FIG. 8 is a sectional view taken along line CC of FIG. FIG. 9 is a sectional view taken along line DD of FIG. FIG. 10 is a flow chart showing an example of a combined sewer system using the filtration device of the present invention, and the same parts are designated by the same reference numerals as those in FIG.

The filtration device 100 has a filtration machine 1 and a tank 80 made of concrete. The filter 1 has a drum 2, a gutter 3, a cleaning device 7, an annular filter 9, an open end support 62, a closed end support 73, a drive 78 and a frame to which they are attached. In the present embodiment, the skeleton is not required because the skeleton 80 is substituted for the skeleton.

The drum 2 into which the liquid 5 flows has a cylinder 2A, a dam plate 2B, a ring 2D and a drum shaft 2E (FIG. 3). Hereinafter, in this specification, the end of the drum 2 on the side where the liquid 5 flows is referred to as an “open end”, and the end of the drum 2 on the side opposite to the side where the liquid 5 flows is referred to as a “closed end”. The longitudinal direction of the cylinder 2A is described as "axial direction". The cylinder 2A has a cylindrical shape, and its closed end is closed in a bag shape, and its open end is partially closed by a dam plate 2B having an inflow hole 2Ba at its center. A ring 2D is provided at the open end of the cylinder 2A.
Is coaxially provided outside, and a drum shaft 2E is provided coaxially at the closed end. An opening 2c is provided at a position of a filter chamber 11 to be described later in the cylinder 2A.

The annular filter 9 comprises the filter segment 2
0, holding frame 31, spokes 43 and bolts 35. The spokes 43 shown in FIG. 4 are hidden from view in FIG. 7 by the filter segment 20. The plate-shaped spokes 43 have screw holes 43a (FIG. 4), and one end in the longitudinal direction is a set of two on the outer periphery of the drum 2 and has an L1 dimension in the axial direction (FIG. 5,
It is arranged at intervals of 8). An annular holding frame 31 is attached to the other ends of the spokes 43 in the longitudinal direction. Thus, a substantially fan-shaped space 9a (FIG. 4) surrounded by the drum 2, the holding frame 31, and the spokes 43 is formed. In the present embodiment, the number of spaces 9a is 9 (at a pitch of 40 degrees in the circumferential direction). And the 9 spaces 9a
A plurality of ring-shaped filters 9 including the above are attached at intervals in the axial direction of the drum 2.

The filter segment 20 has a filter 21 and a filter frame 22. The planar shape of the filter 21 is a substantially fan shape (shown by a broken line in FIG. 6) slightly narrower than the space 9a, and does not overlap with a bolt through hole 22a described later when the filter segment 20 is formed.
The planar shape of the filter frame 22 is a window shape that serves as an outer frame of the filter 21, and the inner and outer peripheries thereof are dimensioned to be loosely inserted into the space 9a. The filter frame 22 has bolt through holes 22a corresponding to the positions of the screw holes 43a. The filter segment 20 is formed by fixing the filter 21 to the filter frame 22 by fixing means such as welding, brazing or adhesion. The filter segment 20 is attached to the pair of spokes 43 from both sides in the axial direction,
The bolt 35 passing through the bolt through hole 22a is screwed into the screw hole 43a.
Screwed onto the spoke 43 so that the filter segment 20
To be concluded.

Filters 21 are provided on both axial side surfaces of the space 9a.
A filter chamber 1 surrounded by a filter segment 20 having
1 is formed. In this embodiment, 9 adjacent to each other in the rotation direction.
It is assumed that there is no partition between the filter chambers 11 at the locations and there is no partition. The filter chamber 11 of the annular filter 9 has a holding frame 31 on the outer circumference, filter segments 20 having filters 21 on both side surfaces, and a drum 2 on the inner circumference. 2A opening 2c
Through the drum 2. It is preferable that the axial dimension L2 (FIG. 9) of the opening 2c be L2 ≦ L1 with respect to the axial dimension L1 of the filter chamber 11 and be as large as possible without impairing the strength of the drum 2. It is preferable that the circumferential dimension L3 (FIG. 7) of the opening 2c be as large as possible without impairing the strength of the drum 2.
If L2 or L3 is small, it interferes with the passage of the solid matter opening 2c which is peeled off and dropped by the cleaning described later.

The gutter 3 is provided in the upper part inside the drum 2 so as to be inclined so that the open end side becomes lower in the longitudinal direction, and the open end side is located outside the drum 2. A weir plate 3A is provided at the end of the gutter 3 on the side of the closed end to prevent overflow of a cleaning drainage liquid 5B described later. The gutter 3 is fixedly attached to the tank 80, but the gutter 3
If the position and the tilt angle are adjustable, the liquid 5
It is preferable because it can be easily dealt with when the property of the item changes, and it is convenient for adjustment during the trial run.

The cleaning device 7 has a main pipe 7A, a branch pipe 7B and a nozzle 7C. One source tube 7A is disposed above the annular filter 9 substantially horizontally. The branch pipe 7B communicates with the lower portion of the main pipe 7A, and is provided in the space between the annular filters 9 that are axially adjacent to each other.
It is arranged substantially vertically. The nozzle 7C is arranged in the branch pipe 7B so as to inject the fluid 7D to the filter 21 of the annular filter 9. The cleaning device 7 is fixedly attached to the tank 80, but if the position of the nozzle 7C is adjustable, it is easy to deal with the case where the property of the liquid 5 changes, and it is convenient for adjustment during the trial run. preferable. As an example of a method for making the position of the nozzle 7C adjustable, a flexible joint, a screwed joint or the like is installed in a part or in the middle of the main pipe 7A and / or the branch pipe 7B. The number of nozzles 7C arranged in one branch pipe 7B may be a single number or a plurality, and may be any number satisfying the function. And the nozzle 7 arranged in the branch pipe 7B
Nozzle mounting holes are provided between C or above the nozzle 7C at the upper end or below the nozzle 7C at the lower end, and the screw holes are closed with a stopper so that the nozzle can be mounted as needed. It is preferable because it is easy to deal with the case where the property of the liquid 5 is changed, and it is convenient for adjustment during the trial run.

The open end support portion 62 (FIGS. 2 and 3) has an open end support plate 62A, a cylinder 62B and a cylinder shaft 62C.
The cylinder shaft 62C passes through the cylinder 62B, and both ends thereof are axially mounted on two open end support plates 62A. The open end support plate 62A is attached to the tank 80. In this way, the cylinder 62B is rotatably provided with respect to the tank 80. The drum shaft 2E is rotatably mounted on the closed end support plate 72 attached to the tank 80. Drum shaft 2E and closed end support plate 72
Form a closed end support 73. Two sets of open end support 6
The two cylinders 62B contact the lower portions of both side surfaces of the ring 2D, and support the drum 2 together with the closed end support portion 73 in the tank 80 rotatably. It is effective to equip the open-end support part 62 or the closed-end support part 73 with a bearing device as needed in order to smooth the rotation.

A driven sprocket 74 is attached to the end of the drum shaft 2E. A drive sprocket 76 is attached to the output shaft of an electric motor 75, which is a drive unit attached to the tank 80, so that the axial position of the drive sprocket 76 is aligned with that of the driven sprocket 74.
Rotation of the electric motor 75 can be transmitted to the driven sprocket 74, and the rotation output of the electric motor 75 is transmitted to the drum shaft 2E and the drum 2 and the annular filter 9 fixed to the drum shaft 2E.
And the annular filter 9 can be rotated. A drive unit 78 is formed by the electric motor 75, the drive sprocket 76, the driven sprocket 74, and the chain 77.

The drum 2 and the annular filter 9 attached to the drum 2 in this manner are rotatably provided in the tank 80. As described above, in the present embodiment, the skeleton is substituted by the tank 80 and the skeleton is not required. However, when the skeleton is used instead of the skeleton 80, the open end support plate 62A, the closed end support plate 72, and the electric motor 75 are It is attached to the body.

Among the materials of the filter 1, at least a part of the material made of iron is plated or SUS30.
4, made of stainless steel such as SUS316,
It is preferable because it is unlikely to corrode and the life can be extended.

The liquid 5 containing the solid component and the oil component and / or the oil lump, which has flowed into the drum 2 from the inflow hole 2Ba in the non-rotating state, flows into the lower filter chamber 11 through the opening 2c, and the filter of the filter segment 20 is filtered. The filtered liquid 5A (FIG. 1), which is filtered by 21, passes through the filter 21 and moves from the filter chamber 11 into the tank 80.
The solid content (not shown) flows out of the tank 80 through the outlet 80a (FIGS. 1 and 3) and is trapped by the filter 21 and remains in the filter chamber 11 below.

When the amount of the solids trapped in the filter 21 in the lower filter chamber 11 increases and the filter 21 becomes clogged, the drum 2 is rotated by 40 degrees in the direction of the arrow in FIG. 7 (that is, the drum). The circular filter 9 fixed to 2 is rotated by 40 degrees, the clogged circular filter J is moved in the direction of the arrow, and the adjacent circular filter K not clogged is moved downward (before the circular filter 9 is rotated).
Move to the position where J existed). At the same time as the rotation, the cleaning device 7 injects a fluid 7D to clean the annular filter L and eliminate clogging. The operation or control of detecting the clogging state and rotating the annular filter 9 may be performed by a person visually detecting the clogging state and driving the electric motor 75. For example, the clogging state may be detected by a level meter (not shown). It is also possible to drive the electric motor 75 by detecting the rise of the liquid level of the liquid 5 of the drum 2 accompanying the above.

By the way, by solidifying the oil component and / or the oil lump adhered to (or contained in) the captured solid component, the solid component is strongly captured by the filter 21, which will be described with reference to FIG. The conventional filter described above does not perform sufficient cleaning. Therefore, in the present embodiment, the fluid 7D jetted from the cleaning device 7 to the captured solids is steam, and the oil and / or oil lumps solidified by the heat of the steam are dissolved, and the solids are solidified by the jetting pressure of the steam. The filter 21 was peeled off and washed. The washed solids and oils and / or oil lumps and the washing drainage 5B (FIG. 1), which is the condensed water of the steam, fall and are received by the gutter 3 through the opening 2c and discharged.

The material of the filter 21 may be a metal film, a ceramic film or a heat resistant resin film, and may be used in combination, and any material having heat resistance capable of withstanding the heat of the steam to be jetted is used. You can In the case of a filter for filtering the overflow water of the combined sewer, a relatively large mesh (such as a metal film in a broad sense) such as a wire mesh or expanded metal is selected as the material of the filter 21. The expanded metal is preferably made of plated iron or stainless steel such as SUS304 and SUS316 because it is less likely to corrode and has a longer life. The size of the mesh is appropriately set according to the properties of the liquid to be filtered. It is also possible to combine one filter 21 having different materials and / or different mesh sizes. The same applies to a filter that filters combined sewage (not overflow water) of combined sewers, a filter that filters rainwater or sewage from a split sewer, or a filter that filters foreign substances in wastewater other than sewers. Is.

An example of the combined sewer system in which such a filtering device 100 is installed will be described with reference to the flow chart of FIG. The rainwater from the rainwater basin 101 and the sewage from the sewage source 102 flow into the confluent sewer pipe 103 to become the confluent sewage 111, which then flows into the rainwater discharge chamber 104 having the overflow weir 104A.
Normally, the combined wastewater 111 does not pass through the overflow weir 104A, flows into the sewage treatment plant 106 through the treatment plant inflow pipe 105, and after treatment, is discharged to the river or the sea through the treated water discharge pipe 107. The upper limit of the amount of water that can flow into the treatment plant inflow pipe 105 is set by the height of the overflow weir 104A, and when the amount of water increases due to heavy rain or the like and exceeds the upper limit, the excess amount exceeds the overflow weir 104A. Overflowing water does not flow into the sewage treatment plant and does not flow into the sewage treatment plant, but flows into the filtration device 100 through the discharge pipe 108, and after filtration, the filtered liquid 5A is discharged into the river or the sea through the filtered liquid discharge pipe 112 and is washed and discharged. The liquid 5B flows into the sewage treatment plant 106 through the cleaning drainage pipe 109, and after being treated, is discharged into a river or the sea through the treated water discharge pipe 107. In this way, the overflow water is not discharged directly to the river or the sea, but is filtered by the filter device 100 and then discharged, so that the degree of pollution of the river or the sea can be reduced.

Even in the split sewer system, oil lumps are produced in the sewer pipe, but since the entire amount of the waste water is treated in the sewage treatment plant, there is no problem of polluting the discharge destination river or sea.
Although oil lumps may occur in the rainwater pipe of the split sewer system, there is no problem of significantly contaminating the river or the sea at the discharge destination because it is an extremely small amount, but after filtering by installing the filtration device 100 in the middle of the wastewater pipe. By discharging the water, it is possible to prevent pollution of the river or sea to a higher degree.

The present invention is not limited to the above-described embodiment, but the following modifications can be made. (1) In the embodiment, the filter chambers 1 adjacent to each other in the rotation direction
Although there is no partition between the first and the second filter chambers, the adjacent filter chambers 11 may be separated by a partition plate. (2) In the embodiment, the outer peripheral portion of the annular filter 9 is shown in FIG.
Although the circular shape like 2, 4, 5 is not limited to this, for example, the outer peripheral portion of each filter segment 20 is made linear, and the holding frame 31 is also made linear accordingly, and the annular filter 9 as a whole is made polygonal. It may be. Similarly, the drum 2 is not limited to a cylindrical shape, and may have a polygonal cylindrical shape, for example. (3) In the embodiment, the holding frame 31 on the outer peripheral portion of the annular filter 9 is not provided with a filter, but the holding frame 31 on the outer peripheral portion is also provided with a filter, and the nozzle 7C is arranged above it. May be. Similarly, a filter may be provided in the intermediate portion of the annular filter 9 which is adjacent to the drum 2 in the axial direction, and the nozzle 7C may be disposed above the filter. (4) In the embodiment, the fluid 7D ejected from the cleaning device 7
However, the present invention is not limited to this, and may be a high temperature fluid such as hot water, or may be a high temperature fluid such as steam or hot water containing an alkaline component having an effect of decomposing oil, or You may use together. (5) In the embodiment, the liquid 5 is made to flow in without rotating, but the liquid 5 may be made to flow in while rotating. (6) In the embodiment, the electric motor 75 is used as the driving device, but the present invention is not limited to this. For example, a hydraulic motor may be used as the driving device, or in the case of a small-scale device, it may be manually driven without the electric motor or the like. . (7) In the embodiment, the upper side of the gutter 3 has no lid and is opened over the entire length. However, the present invention is not limited to this. For example, only a portion corresponding to the opening 2c of the drum 2 may be opened and the other lid may be provided. . (8) In the embodiment, the tank 80 is made of concrete, but is not limited to this, and may be made of, for example, metal or resin, or may be a combination thereof. And when it is made of iron, at least a part of it is plated or SUS304, S
It is preferable to use stainless steel such as US316 because it is less likely to corrode and the life can be extended. (9) In the embodiment, the tank 80 is an open upper type as shown in FIG. 2, but it may be a closed type with an upper cover. By doing so, the scattering prevention effect of the fluid 7D (for example, water vapor) ejected from the cleaning device 7 can be obtained. (10) In the embodiment, the plurality of annular filters 9 are the drum 2
Although they are attached at intervals in the axial direction, the number of annular filters may be one. Then, the one annular filter may be lengthened in the axial direction, and the filter may be provided on the holding frame 31 on the outer peripheral portion and the nozzle 7C may be arranged on the upper side thereof, as in the modification 3 described above. (11) In the embodiment, the filtered liquid component is made to flow out of the tank 80 from the outlet 80a in the tank 80, but the present invention is not limited to this. An overflow weir may be provided at 80 to allow overflow. (12) In the embodiment, the number of the branch pipes 7B is one for one filter surface, but the number is not limited to this and may be one or more. (13) In the embodiment, when the filter 21 becomes clogged, the drum 2 is rotated by 40 degrees for cleaning, but the present invention is not limited to this, and the rotation angle may be less than 40 degrees or more than 40 degrees.

In the present invention, the combination of the above modifications or the combination of the embodiment and the modifications can be arbitrarily performed.

Although the embodiments and modifications of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments and modifications, and can be made into various forms, and any high-temperature fluid can be injected into a rotating filter. It can be a filter and a filter device. The shape and material of the filter or filter,
Means for fixing (or fastening) members to each other, liquid inflow system, rotatably supporting system, drive system,
The positioning method, the operation or control method, or the like can be any method that satisfies the function. Needless to say, various improvements and design changes can be made without departing from the spirit of the present invention.

[0038]

EFFECTS OF THE INVENTION According to the present invention, in a filter and a filter for a liquid containing oil, the oil adhering to (or contained in) the solids captured by the filter is solidified and peeled off by conventional cleaning. Even when it becomes difficult, the fluid 7D ejected from the cleaning device 7 is a high temperature fluid such as steam or hot water to dissolve the oil content solidified by the heat of the high temperature fluid and to generate the solid content by the injection pressure of the high temperature fluid. Since the filter 21 is peeled off and washed, it is possible to provide a filter and a filter device that can easily filter an oil-containing liquid. Particularly, according to the present invention, it is possible to provide a filter and a filter device that can easily filter the overflow water containing the oil lump of the combined sewer.

[Brief description of drawings]

FIG. 1 is a perspective view of a filtering device according to an embodiment.

FIG. 2 is a front view of a filtration device.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a drum 2, a holding frame 31, a spoke 43,
It is a front view which shows the space 9a.

5 is a sectional view taken along line BB of FIG.

6 is a front view showing the filter segment 20. FIG.

FIG. 7 shows a filter segment 20 on the spoke 43 of FIG.
It is a front view which shows the state with which was attached, and the gutter 3 and the nozzle 7C.

8 is a cross-sectional view taken along line CC of FIG.

9 is a cross-sectional view taken along line DD of FIG.

FIG. 10: 1 of a combined sewer system using the filtration device of the present invention
It is a flowchart which shows an example.

FIG. 11 is a flowchart showing an example of a conventional combined sewer system.

FIG. 12 is a perspective view of a conventional filter and tank.

FIG. 13 is a side sectional view of a conventional filter, which is indicated by F in FIG.
-F sectional view.

14 is a sectional view taken along line EE of FIG.

[Explanation of symbols]

1 Filter 2 drums 2A cylinder 2B weir plate 2Ba inflow hole 2c opening 2D ring 2E Drum shaft 3 gutter 3A dam plate 5 liquid 5A filtrate 5B cleaning drainage 7 Cleaning device 7A original pipe 7B branch pipe 7C nozzle 7D fluid 9, J, K, L ring filter 9a space 11 Filter room 20 filter segments 21 Filter 22 filter frame 22a hole 31 holding frame 35 volts 43 spokes 43a screw hole 62 Open end support 62A open end support plate 62B cylinder 62C cylinder shaft 72 Closed end support plate 73 Closed end support 74 Driven sprocket 75 electric motor 76 drive sprocket 77 Chain 78 Drive 80 tanks 80a outlet 100 Filtration device 101 Rain Masu 102 Sewage source 103 Combined sewer 104 Rainwater spouting room 104A Overflow weir 105 Treatment plant inflow pipe 106 Sewage treatment plant 107 Treated water discharge pipe 108 Discharge pipe 109 Wash drainage pipe 111 Confluent wastewater 112 Filtrate discharge pipe

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01D 39/20 B01D 71/02 63/16 71/06 65/02 E03F 5/14 71/02 B01D 33 / 26 71/06 33/34 E03F 5/14 F term (reference) 2D063 AA05 DB04 DB08 4D006 GA02 HA83 KC03 KC15 MA03 MB15 MC02 MC03 MC09 PB08 PC80 4D019 AA03 BA01 BA13 BC12 CB04 4D026 BA01 BB01 BC01 BD01 BD02 BE14 BF06

Claims (5)

[Claims] 1. A filter for filtering a liquid with a rotatably provided filter, wherein a washing device for injecting a high temperature fluid into the filter is provided and the material of the filter has heat resistance. And a filter machine. 2. The filter according to claim 1, wherein the cleaning device injects steam and / or hot water. 3. The filter according to claim 1, wherein the filter has a metal film, a ceramic film and / or a heat resistant resin film. 4. The filter according to claim 1, which is used for filtering the overflow water of the combined sewer system. 5. A filtration device in which the filter according to claim 1 is attached to a tank.