JP2958316B1 - Water purification equipment - Google Patents

Abstract

An object of the present invention is to provide a water purification apparatus having a small installation area, a simple structure, and excellent purification performance and economic efficiency. A water purification apparatus has a cylindrical outer tank and an inner tank arranged concentrically. The bottom of the inner tank 10 is open and communicates with the outer tank 2. The annular space between both tanks is vertically divided by the active soil part 20. A contact member 40 for adsorbing solids in the polluted water is provided in the space below the active soil portion and inside the inner tank. At the center of the outer tank 2 is a suction pipe 8
There is. The contaminated water introduced into the upper part of the outer tank 2 by the inflow pipe 31 moves down in the circumferential direction, descends, is processed through the active soil part, turns while contacting the contact material 40, and turns into the inner tank 10. It enters, rises and is drawn out of the tank from the purified water deriving means 50. The solids that have separated and deposited on the bottom can be efficiently sucked out of the tank through the suction pipe 8. It is economical because no power is required for driving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a water purification device for purifying polluted water. The water purification device of the present invention is
It can be used to improve the water quality of moats, lakes and marshes, and rivers, and to treat human wastes.

[0002]

2. Description of the Related Art In recent years, water pollution of moats, lakes, marshes, rivers, and the like has rapidly progressed, and the severity of the pollution has deepened to a global scale. Although the causes are various, it is considered that the main cause is, for example, inflow of domestic wastewater, rainfall contaminated water, industrial wastewater, livestock night soil and the like into water bodies. As a countermeasure, maintenance of sewerage and establishment of factory drainage standards are being carried out. However, at present, odors and blue-green algae are generated in many moats, lakes, marshes, rivers, and the like, and water quality has not always been improved.

[0003] Water pollution in moats, lakes, marshes, rivers and the like described above is caused by insufficient oxygen and eutrophication (nitrogen, phosphorus, etc.) due to lack of inflow of water and lack of circulation of water. Conceivable.

In order to solve such a problem, conventionally, a submersible pump or a fountain is installed to cause a flow in the water to dissolve oxygen into the water, and a porous stone such as pumice or activated carbon such as activated carbon is provided on the bottom of the water. By laying a layer, pollutants in the water were removed.

[0005] However, the conventional large-scale purification facilities as described above, for example, in the case of rivers and the like, are affected by rainwater and cause increased water and floods. could not.

Therefore, conventionally, water purification facilities as shown in FIGS. 13 and 14 have been installed adjacent to rivers, lakes, marshes, moats and the like. FIG. 13 is called a horizontal flow purification system, and FIG. 14 is called a vertical flow purification system.

[0007] The purification apparatus of the lateral flow purification system shown in FIG. 13 has a box-shaped purification tank 100. The inside of the septic tank 100 has a flow path meandering in a horizontal plane formed by a plurality of partition walls 101 provided alternately on the left and right. A contact member to which pollutants adhere is provided in the flow path of the septic tank 100. The contaminated water introduced from the inlet of the septic tank 100 comes into contact with the contact member while flowing through the flow path, and the pollutant adheres to the contact member. The contaminants attached to the contact member settle at the bottom of the septic tank 100. The water that has passed through the flow path is discharged as purified water out of the septic tank 100, or introduced into the next septic tank installed in series.

[0008] The purification apparatus of the vertical flow purification system shown in FIG. 14 also has a box-shaped purification tank 200. Inside the septic tank 200, a flow path meandering in the vertical direction is formed by a plurality of partition walls 201 provided alternately up and down. A contact member to which the pollutant adheres is provided in the flow path of the septic tank 200. The polluted water introduced from the entrance of the septic tank 200 contacts the contact member while flowing through the flow path, and the pollutant adheres to the contact member. The contaminants attached to the contact member settle at the bottom of the septic tank 200. The water that has passed through the flow path is discharged as purified water out of the septic tank 200, or is introduced into the next septic tank installed in series.

[0009]

In the movement of raw water, it is desirable that the flow velocity in contact with the contact member is uniform, and for that purpose, the flow velocity of raw water must be constant at any position in the flow path. desirable. However, the above-described conventional purification apparatus has a structure in which polluted water flows through a straight zigzag flow path having a rectangular cross section provided in a box-shaped purification tank.
For this reason, in both the vertical flow and the horizontal flow systems, there is a problem that the flow velocity in the central part is faster than the partition wall side in the flow direction, and the flow velocity is not constant.
In addition, both types of devices require a large number of partition walls, and there is a problem that the structure is complicated.

In the case of the lateral flow purification system shown in FIG. 13, when the purification tank 100 is too deep, the flow velocity at the bottom becomes slower than that at the surface. Therefore, there is a problem that the septic tank 100 cannot be made too deep, so that a large installation area is required to obtain a required volume.

Further, suspended solids deposited and deposited on the bottom of the septic tank must be periodically removed. In both types of apparatuses, the periodic removal of suspended solids is performed by suction or the like after once removing the contact member in the septic tank outside the tank. That is, according to the conventional apparatus, there is a problem that the deposit cannot be removed while leaving many contact members as they are, and the contact members in the septic tank need to be periodically taken in and out for maintenance. Was.

An object of the present invention is to provide a water purification apparatus which has a small installation area and a simple structure, and has excellent purification performance.

[0013]

A water purifier (1) according to the present invention has a cylindrical outer tank (2) having a closed bottom.
An inner tank (10) provided inside the outer tank such that the opened bottom is located above the bottom of the outer tank;
An activated soil portion (20) provided in the space so as to divide an annular space between the outer tank and the inner tank into an upper part and a lower part;
A raw water supply means (30) connected to the outer tub to allow raw water to flow into the upper part of the annular space, and a raw water supply means (30) provided in the lower part of the annular space and inside the inner tub, It has a contact member (40) to which pollutants adhere, and a purified water deriving means (50) provided near the water surface of the inner tank and guiding purified water to the outside.

[0014] The water purification apparatus (1) according to claim 2 is
The water purification device according to claim 1, wherein the active soil portion (2)
0) is a water-permeable holding material (mesh material 2) provided in the annular space so as to divide the annular space into an upper portion and a lower portion.
1) and an active soil (22) held by the holding material.

[0015] The water purification apparatus (1) according to claim 3 is
2. The water purification device according to claim 1, wherein the raw water supply means (30) includes a raw water inflow pipe (31) for guiding raw water to an upper part of the annular space, and a raw water supplied from the raw water inflow pipe into the annular space. 3. And a direction regulating member (33) for turning in the circumferential direction.

[0016] The water purification device (1) according to claim 4 is
The purified water purifier according to claim 1, wherein the purified water deriving means (50) has a closed bottom surface and an open top surface,
A purified water storage tank (51) provided substantially at the center of the inner tank and receiving purified water, and a purified water conduit (52) communicated with the purified water storage tank and led out of the outer tank. And characterized in that:

[0017] The water purification device (1) according to claim 5 is
2. The water purification apparatus according to claim 1, further comprising a sludge receiving tank (6) for receiving the settled sludge substantially at the center of the bottom of the outer tank, and supplying the sludge settled in the sludge receiving tank to the outer tank and the inner tank. It is characterized in that a suction pipe (8) for sucking up outside is provided.

[0018] The water purification apparatus (1) according to claim 6 is
The water purification apparatus according to claim 5, wherein at least one of the bottom of the sludge receiving tank (6) and the bottom of the outer tank (2) is formed in a tapered shape.

The water purifier (1) according to claim 7 is
The water purifier according to claim 1, wherein the outer tank (2) and the inner tank (10) are substantially cylindrical, and both tanks are arranged substantially concentrically.

The water purifier (1) according to claim 8 is
The water purifier according to claim 1, wherein a plurality of inner tank support bases (11) are installed at the bottom of the outer tank (2), and the inner tank (10) is installed on the inner tank support base. And

According to a ninth aspect of the present invention, there is provided a water purification device (1).
2. The water purification apparatus according to claim 1, wherein a ratio of a cross-sectional area of the annular space in a horizontal plane to a cross-sectional area of the inner tank (10) in a horizontal plane is approximately 1: 1.

[0022] A water purification apparatus according to claim 10 (1).
The water purifier according to claim 1, wherein a flow rate of the water in the annular space (at least one of a flow rate in a circumferential direction and a flow rate in a vertical direction) and a flow rate of the water in the inner tank (10) are reduced. It is characterized by being substantially equal.

[0023] A water purification apparatus (1) according to claim 11.
The water purifier according to claim 1, wherein the outer tank (2) is provided.
Is provided with rigidity that can withstand water pressure, and the inner tank (10)
Is made of a flexible material held in a cylindrical shape.

[0024] A water purification apparatus (1) according to claim 12.
The holding material (13) according to claim 11, wherein an upper end and a lower end of the flexible material (nonwoven fabric 12) are annular.
The holding material is held by the outer tub (2).
Is suspended from a girder material (41) extended over the upper part of the girder.

[0025] A water purification apparatus (1) according to claim 13.
The microorganism according to claim 2, wherein the microorganisms of the active soil (22) eluted in the raw water generate a viscous substance in the raw water while the raw water moves from the upper part to the lower part of the annular space. As a result, the action of adsorbing pollutants in the raw water is promoted, and the raw water enters the inside of the inner tank (10) from the lower part of the inner tank (10), and the inside of the inner tank (10) During the upward movement, the contaminant adsorbed by the viscous substance is transferred to the contact member (4
0).

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 to FIG. 3, the water purification device 1 of the present embodiment is a cylindrical body having a double structure as a whole, and the lower half is substantially underground in a posture in which the axis of the cylinder is substantially vertical. It is installed to be buried. The outer tub 2 constituting the outer wall is made of concrete,
It is formed of a rigid material such as a steel plate such as a liner plate or a corrugated pipe. The bottom of the outer tub 2 is closed by a foundation 3. The foundation 3 is composed of a rubble stone 4 provided on the ground and a foundation concrete part 5 formed thereon. The base concrete part 5 constituting the bottom of the outer tub 2 is tapered at the center. A sludge receiving tank 6 is provided at the center of the basic concrete section 5. The sludge receiving tank 6 has an inverted truncated conical recess 7. The upper part of the outer tank 2 is open.

In this example, the lower half is buried to increase the strength and stability of the structure. However, if it is constructed directly on the ground without providing an underground foundation, the construction cost can be reduced. .

As shown in FIG. 1, a suction pipe 8 is provided in a sludge receiving tank 6 at the center of the outer tank 2. The lower end of the suction pipe 8 faces the bottom surface of the sludge receiving tank 6 at a predetermined interval. The suction pipe 8 is provided at a position substantially coincident with the center axis of the outer tub 2. As shown in FIG. 4, the suction tube 8
It is supported by a substantially cross-shaped support 9 installed at the opening of the recess 7 of the sludge receiving tank 6. The suction pipe 8 is guided upward along the center line of the outer tub 2, and after being out of the tub, is bent in a horizontal direction and extends to the outside of the tub. Although not shown,
Suction means such as a vacuum pump is connected to the suction pipe 8. Alternatively, they are linked as needed. In the process of purifying the polluted water with the present water purification device 1, when the sludge falls to the bottom of the outer tank 2 and the amount of the sludge accumulated in the concave portion 7 of the sludge receiving tank 6 reaches a certain level, a pump or the like connected to the suction pipe 8 is used. The suction means is operated, and the precipitated sludge is sucked out of the tank through the suction pipe 8.

As shown in FIGS. 1 to 3, an inner tank 10 is provided inside the outer tank 2. The inner tank 10 has a cylindrical shape with an open bottom, and is smaller in diameter and height than the outer tank 2. The inner tank 10 and the outer tank 2 are arranged substantially concentrically.
The open bottom of the inner tank 10 is located higher than the bottom of the outer tank 2. That is, a plurality of (six in this example) inner tank support bases 11 are fixed circumferentially at predetermined intervals on the bottom of the outer tank 2. The bottom of the tank 10 is placed and fixed. As the inner tank support base 11, a steel pipe or the like having an appropriate outer diameter can be used. Since the inner tank 10 is not subjected to a large water pressure, it is not necessary to form the inner tank 10 with a rigid material such as the outer tank 2, but it is impermeable and has a certain degree of durability against sewage (polluted water). It is preferable to use a certain material.

Since the inner tank 10 does not receive a large water pressure, a flexible water-impermeable material may be used. For example, FIG.
As shown in (2), the nonwoven fabric 12 and the like may be formed in a cylindrical shape, and rigid holding members 13 may be provided at both upper and lower ends, and may be suspended in the outer tank 2 with the upper holding members 13. In that case, the inner tank support base 11 is not required.

As shown in FIG. 1, an annular space is defined between the outer tank 2 and the inner tank 10, and an active soil portion 20 is provided in this space. The active soil portion 20 includes a mesh material 21 which is a water-permeable holding material provided in the space so as to divide the annular space into an upper portion and a lower portion, and an active soil installed on the mesh material 21. 22. The mesh member 21 is composed of a fan-shaped unit as shown in FIG. A plurality of supports 23 are fixed radially at predetermined intervals between the inner peripheral surface of the outer tub 2 and the outer peripheral surface of the inner tub 10.
Mounted and fixed on top. The active soil on the mesh material 21 is filled in a permeable bag that can be eluted into external water. The active soil in the bag is not densely arranged so as to completely separate the upper and lower parts of the annular space, but is immersed in the raw water flowing in the tank and eluted into the raw water. I just need. The active soil 22
As a holding material for holding the material, any member having water permeability that can hold active soil may be used. In addition to the mesh material 21 as described above, a plate material having slits may be used.

The active soil refers to a soil or soil-like substance containing bacteria having a function of coagulating and polymerizing pollutants (pollutants) in a soil-like environment. By dissolving such soil substances into the tank, the environment in the raw water for microorganisms is changed, and the activity of microorganisms that are also present in the raw water is induced to cause the same corrosion process as that performed in soil. Let go. For example, under certain conditions, aerobic bacteria ingest organic matter, use oxygen to obtain energy, and synthesize cell components. The active soil may have such an effect. That is, in this case, the organic matter in the raw water (waste water) is changed into water, carbon dioxide, and cellular components. In this case, the active soil is mainly Zugsia, Anamorobacter, Alcaligenes, Flavobacterium,
Bacteria and protozoa such as Pseudomonas and Escherichia coli solidify to form irregular blocks, and viscous polysaccharides and gelatin substances secreted by these microorganisms promote block formation. Absorb substances and purify raw water. As described above, the active soil used in the present example is intended to provide the soil microorganisms with an original soil environment and activate the inherent activity of bacteria.
Here, a process similar to that occurring in the corrosion process in the soil is generated, and further, has an antibacterial action against other germs and the like.

According to the active soil used in this example, the following effects are obtained. There is no odor. The BOD of the treated water decreases without the advanced treatment facility. Removal of ionic substances is possible. Since the control of various bacteria is performed by the action of the soil bacteria group, it is not necessary to add chlorine or the like. Sludge can be reduced to soil.

As shown in FIG. 1, FIG. 7 and FIG.
Raw water supply means 30 is connected and connected to the upper part of. The raw water supply means 30 causes the raw water to flow into the upper part of the annular space, that is, the space above the active soil part 20. The raw water supply means 30 has a raw water inflow pipe 31 for guiding raw water above the annular space. The raw water inflow pipe 31 is arranged along the radial direction of the outer tub 2. The raw water inflow pipe 31 is provided with an inflow amount adjustment valve 32. A direction regulating member 33 is connected to the raw water inflow pipe 31 in the upper part of the annular space. As shown in FIGS. 7 and 8, the direction regulating member 33 is a dust-shaped casing having an open upper surface and a front surface, and the front surface is directed in the circumferential direction of the annular space. The width of the direction regulating member 33 is smaller than the interval between the outer tub 2 and the inner tub 10, and the flow of the raw water on the surface is not hindered. Therefore, the raw water supplied from the raw water inflow pipe 31 enters the direction regulating member 33 in the annular space and is sent out in the circumferential direction. Although not shown, the raw water inflow pipe 3
1 may supply raw water directly to the upper part of the annular space without the direction regulating member 33. In that case,
If the tip of the raw water inflow pipe 31 is arranged along the circumferential direction and is directed obliquely to the water surface, the raw water flowing out of the pipe moves in the circumferential direction in the tank. That is, the directivity in the circumferential direction can be given to the raw water supplied into the tank.

As shown in FIG. 1, a contact member 40 to which pollutants in the raw water adhere is provided below the annular space, that is, a space below the active soil portion 20. The same contact member 4 is also provided inside the inner tank 10.
0 is provided. The contact member 40 comes into contact with the flowing raw water (polluted water) to attach floating sludge in the polluted water. When a certain amount of the suspended sludge adheres to the contact member 40, the suspended sludge spontaneously separates and accumulates on the bottom of the outer tank 2, and collects in the recess 7 of the sludge receiving tank 6 by the tapered surface. In this example, a long band-shaped nonwoven fabric was used. The contact member 40 may be anything to which a floating substance in water adheres. In addition to the nonwoven fabric, a flexible plate, an iron plate,
Various materials such as mesh and cotton cloth can be used. Further, instead of a single material, charcoal, activated carbon, porous stone or the like packed in a long net-like bag can be used by suspending it in a storage tank.

The contact member 40 of this embodiment is a long band-shaped nonwoven fabric. The contact member 40 inside the inner tank 10 is shown in FIG.
As shown in FIGS. 3 and 10, the cylindrical outer tank 2 and the inner tank 1
It is suspended from the girder 41 spanned over the opening at the top of the 0, and is suspended in the tank in a state parallel to the axial direction of the cylindrical tank. The beam 41 includes two main beams 42 and a number of connecting beams 43 connected to the main beam 42. FIG.
As shown in FIG.
Is suspended from the connecting beam 43 by suspension bolts 44. The arrangement of the contact members 40 in the inner tank 10 may be substantially radial from the center of the tank, or may be provided at fixed vertical and horizontal intervals. As shown in FIG. 9, the contact member 40 in the space between the outer tub 2 and the inner tub 10 is suspended from the upper ends of the outer tub 2 and the inner tub 10 by suspension bolts 44.

As shown in FIGS. 1, 11 and 12, a purified water deriving means 50 for guiding purified water to the outside of the tank is provided at the center of the inner tank 10. First, at substantially the center of the inner tank 10, a purified water storage tank 51 is provided near the water surface. The purified water storage tank 51 has a closed bottom surface and an open top surface, and the open top surface substantially matches the water surface of the inner tank 10. For this reason, the purified water on the central water surface of the inner tank 10 flows into the purified water storage tank 51. A purified water conduit 52 is connected to the purified water storage tank 51 so that purified water can be led out of the outer tank 2.
A water control valve 53 is connected to the purified water conduit 52. The suction pipe 8 penetrates the center of the purified water storage tank 51 in a watertight state.

The diameters of the outer tank 2 and the inner tank 10 are set so that the flow rate of the contaminated water in the annular space between the two tanks is substantially equal to the flow rate of the contaminated water in the inner tank 10. . Therefore, the cross-sectional area of the annular space between the outer tub 2 and the inner tub 10 is substantially equal to the area of the circular cross-section of the inner tub 10.

As described above, the flow rate of the contaminated water in the annular space between the outer tank 2 and the inner tank 10 is substantially equal to the flow rate of the contaminated water in the inner tank 10. And this water purification device 1
The flow rate of the water to be treated is kept almost constant at any position in the inside, that is, at a portion near or away from the wall of each tank. Therefore, the contact state between the contact member 40 arranged in the tank and the water is substantially uniform at all positions in the tank, and almost all the contact members 40 perform their original functions and the floating sludge (polluted) in the polluted water is discharged. Substance) can be efficiently attached.

In order to increase the adhesion effect of suspended sludge (pollutant), the flow rate of the polluted water to be purified and the time for contacting the contact member 40 are appropriately set. Although depending on conditions such as the type and number of the contact members 40, if the water quality achieved after purification is such that 30 to 50% of the suspended sludge adheres and settles, the flow rate is 1 cm / sec or less, preferably 0.1 cm / sec or less. 5
Approximately 1 mm / sec, and several hours is appropriate for the purification time. In general, the higher the turbidity of raw water, the longer the flow down distance needs to be. It is necessary to increase the installed capacity in proportion to the purification capacity.

Further, according to the water purification apparatus 1 of this embodiment, the raw water enters the upper part of the annular space between the outer tank 2 and the inner tank 10, that is, above the active soil part 20, and flows in the circumferential direction of the cylinder. While descending. Then, the active soil is brought into contact with the active soil portion 20 to elute the active soil into water. Then, the contaminated water comes into contact with the contact member and descends while flowing in the lower part of the annular space and flowing in the circumferential direction. Further, the raw water enters the inner tank, rises while flowing in the circumferential direction, and comes into contact with the contact member.

Here, microorganisms are originally present in the raw water, but the eluted active soil changes the environment of the microorganisms in the raw water, and induces the activity of the microorganisms originally present in the raw water to be carried out in the soil. Proceed with the same corrosion process as has been done. In other words, viscous polysaccharides and gelatin substances secreted by microorganisms in raw water absorb colloidal substances and suspended substances in raw water,
This adheres to the contact member. In this way, the suspended solids in the raw water are gelled by the action of the active soil, and further adhere to the contact members while flowing in the tank in the circumferential direction, and are separated from the raw water. The treated water reaches the upper portion of the inner tank 10, is collected in the purified water storage tank 51 at the center, and is sent out from the purified water conduit 52.

During this time, the polluted water flows at a substantially constant flow rate at almost all positions in the outer tank 2 and the inner tank 10.
Therefore, the contact state between the contact member 40 disposed in the tank and the water is uniform at any position, and almost all the contact members 40 perform their original functions to remove floating sludge (pollutant) in the polluted water. It can be attached efficiently.

When a certain amount of sludge adheres to the contact member 40, the sludge peels off and deposits on the tapered portion at the bottom of the outer tank 2. The sediment further collects in the recess 7 of the sludge receiving tank 6.
In the above-mentioned conventional purification device of the horizontal flow or vertical flow purification method, in order to remove sludge deposited on the bottom of the storage tank, the contact member 40 installed in the storage tank is taken out, and then the large storage tank is spread. It was necessary to remove the deposits over the entire bottom surface. However, according to the present invention, since the lower half in the tank is open as a space for storing sludge, there is no problem in water purification work even if a large amount of sludge is accumulated. When removing the accumulated sludge,
It is not necessary to take out the contact member 40. Only by operating a suction means such as a pump connected to the suction pipe 8, the sludge settled in the tank can be efficiently sucked out through the suction pipe 8.

In the present invention, when replacing the contact member 40, the girder member 41 is lifted by a crane or the like, and the suspended contact member 40 is extracted from the tank. Alternatively, the beam members 41 are left as they are, and the respective contact members 40 are removed from the beam members 41 and extracted from the tank.

[0046] Two or more water purification devices described above may be connected to provide a water purification facility for further advanced treatment. That is, a plurality of water purifiers are sequentially installed at lower positions from the first water purifier to the second water purifier, and the purified water conduit of the first water purifier is connected to the raw water inflow pipe of the second water purifier. Then, similarly, the purified water conduit of the preceding water purification device is connected to the raw water inflow pipe of the later water purification device. In this way, a large amount of raw water can be highly treated, or the water purification effect can be enhanced.

In this embodiment, the outer tank and the inner tank are cylindrical, but the shape of the tank is not limited. In short, it is sufficient if there is an outer tank and an inner tank provided inside the outer tank and communicating with the outer tank at the bottom,
The shape may be, for example, a polygonal cylindrical shape. Further, in this example, the raw water has moved in the circumferential direction in the tank, but the circumferential movement is not always essential. In short, it is sufficient that the raw water moves sequentially from the outer tank to the inner tank in the tank, and the same effect can be obtained even if the direction of the movement is not the circumferential direction but the vertical direction. In the case of vertical movement, the preferable value of the flow velocity is substantially the same as that in the case of the circumferential flow velocity.

As described above, according to the water purification apparatus of the present invention, the following effects can be obtained. (1) Polluted water can be treated efficiently by a combination of active soil and contact members. (2) Since the time during which the polluted water to be treated is in contact with the contact member is not uneven, the suspended sludge can be efficiently removed. (3) Underground burial is possible. (4) Sludge accumulates on the tapered bottom of the tank, so that it can be taken out of the tank directly by vacuum or the like, and the sludge can be easily removed.

[0049]

According to the present invention, an active soil portion is provided between a cylindrical inner tank and an outer tank, and a contact member is provided below the active soil portion and inside the inner tank, and the contact member is provided above the active soil portion. By moving the polluted water introduced into the container while swirling, efficient treatment can be performed with the active soil and the contact member. That is,
After moving the contaminated water in the cylindrical tank at a uniform flow rate in the circumferential direction and treating the contaminated water with the activated soil, the sludge (contaminated material) is efficiently contacted with the contact members in the tank evenly. Can be attached and removed. In addition, a sludge receiving tank is provided at the bottom of the tank to facilitate the collection of the sediment, and a suction pipe is provided therein so that the sediment can be easily removed by suction. Therefore, according to the present invention, there is an effect that it is possible to realize a water purification device and a water purification facility which are small in installation area and simple in structure, and excellent in purification performance and maintainability. Further, the water purification apparatus of this embodiment has an excellent practical effect that it requires little power for operation and is economical.

[Brief description of the drawings]

FIG. 1 is a sectional view of a water purification device of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1;

FIG. 4 is an enlarged view as viewed from an arrow C in FIG. 1;

FIG. 5 is a perspective view showing another embodiment of the inner tank in the water purification device of the present invention.

FIG. 6 is a plan view showing a mesh material of an active soil portion in the water purification device of the present invention.

FIG. 7 is a perspective view showing raw water supply means in the water purification device of the present invention.

FIG. 8 is a sectional view showing a positional relationship between raw water supply means and a water surface in the water purification device of the present invention.

FIG. 9 is a diagram showing a contact member and a suspension structure of the contact member in the water purification device of the present invention.

FIG. 10 is a diagram showing a contact member and a suspension structure thereof in the water purification device of the present invention.

FIG. 11 is a plan view of purified water deriving means in the water purification device of the present invention.

FIG. 12 is a sectional view of purified water deriving means in the water purification device of the present invention.

FIG. 13 is a plan view and a side cross-sectional view showing a purification device of a lateral flow purification type which is a conventional water purification device.

FIG. 14 is a plan view and a sectional side view showing a purification device of a vertical flow purification type which is a conventional water purification device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water purification apparatus 2 Outer tank 6 Sludge receiving tank 8 Suction tube 10 Inner tank 11 Inner tank support base 13 Retaining material 20 Active soil part 21 Mesh material as a retaining material for water permeability 22 Active soil 30 Raw water supply means 31 Raw water inflow pipe 33 Direction regulating member 40 Contact member 41 Beam member 50 Purified water deriving means 51 Purified water storage tank 52 Purified water conduit

Continued on the front page (73) Patentee 000231110 Nippon Kokan Light Steel Co., Ltd. 6100, Sankeijiri, Kumagaya-shi, Saitama (73) Patentee 596143277 Union Hume Tube Co., Ltd. 2-3-12 Kaminarimon, Taito-ku, Tokyo (72 ) Inventor Katsukuni Ashino 3-1-2 Takada, Chigasaki-shi, Kanagawa Prefecture (72) Inventor Hiroshi Shibuya 144-71, Kasugada-cho, Hodogaya-ku, Yokohama-shi, Kanagawa-ken (72) Inventor Masato Mori 7- Odajimacho, Shinjo-shi, Yamagata Prefecture 36 (72) Inventor Fujio Seya 1-21-20 Izumigaoka, Iwaki-shi, Fukushima Prefecture (72) Inventor Hiroshi Ejiri 788-26, Jurokuma, Kumagaya-shi, Saitama Prefecture (72) Inventor Minoru Onda 641- Niibori, Kumagaya-shi, Saitama Prefecture 208 (56) References JP-A-8-13284 (JP, A) JP-B-58-57239 (JP, B2) JP-B-60-26599 (JP, B2) (58) Fields investigated (Int. ⁶ , DB name) C02F 3/00-3/34

Claims (13)

(57) [Claims] A cylindrical outer tank having a closed bottom; an inner tank provided inside the outer tank such that an open bottom is located above a bottom of the outer tank; An active soil portion provided in the space so as to divide the annular space between the inner tank and the inner tank into an upper part and a lower part, and connected to the outer tank to allow raw water to flow into the upper part of the annular space. A raw water supply means, a contact member provided inside the lower part of the annular space and the inner tank and to which pollutants in the raw water adhere, and provided near the water surface of the inner tank to remove purified water. Water purification device having purified water deriving means for guiding water. 2. The active soil portion includes a water-permeable holding material provided in the space so as to divide the annular space into an upper portion and a lower portion, and active soil held by the holding material. The water purification device according to claim 1, wherein 3. A raw water supply pipe for guiding raw water to an upper portion of the annular space, and a direction regulating member for directing raw water supplied from the raw water inflow pipe in the circumferential direction in the annular space. The water purification device according to claim 1, comprising: 4. A purified water storage tank having a closed bottom surface and an open upper surface, provided substantially at the center of an inner tank, for receiving purified water, and said purified water storage tank. The water purification device according to claim 1, further comprising a purified water conduit connected to a storage tank and led out of the outer tank. 5. A sludge receiving tank for receiving the settled sludge substantially at the center of the bottom of the outer tank, and a suction pipe for sucking the sludge settled in the sludge receiving tank out of the outer tank and the inner tank. The water purification device according to claim 1, further comprising: 6. The water purification apparatus according to claim 5, wherein at least one of the sludge receiving tank and the bottom of the outer tank is formed in a tapered shape. 7. The water purification apparatus according to claim 1, wherein said outer tank and said inner tank are substantially cylindrical, and both tanks are arranged substantially concentrically. 8. The water purification apparatus according to claim 1, wherein a plurality of inner tank support bases are installed at the bottom of the outer tank, and the inner tank is installed on the inner tank support base. 9. The water purifier according to claim 1, wherein a ratio of a cross-sectional area of the annular space in a horizontal plane to a cross-sectional area of the inner tank in a horizontal plane is approximately 1: 1. 10. The flow rate of water in the annular space,
The water purifier according to claim 1, wherein the flow rates of the water inside the inner tank are substantially equal. 11. The water purifier according to claim 1, wherein the outer tub has rigidity enough to withstand water pressure, and the inner tub is made of a flexible material held in a cylindrical shape. 12. The flexible material according to claim 11, wherein an upper end and a lower end of the flexible material are held by an annular holding member, and the holding member is hung from a girder material bridged over an upper portion of the outer tub. Water purification equipment. 13. While the raw water moves from the upper part of the annular space to the lower part, microorganisms of active soil eluted in the raw water generate viscous substances in the raw water to remove pollutants in the raw water. While the action of adsorbing is promoted, the raw water enters the inner tank from the lower part of the inner tank,
The water purification apparatus according to claim 2, wherein the polluted substance adsorbed by the viscous substance adheres to the contact member while moving upward inside the inner tank.