JPH06304586A - Purifying unit - Google Patents

Abstract

(57) [Summary] [Purpose] To be able to efficiently wash the inside of the biological filter tank to every corner even with a small amount of backwash water. In the purification unit 1 for taking out the bath water from the bath 2 and passing it through the filtration tank 10, the biological filter beds 14a and 14b, and the sterilization device 16 to return it to the bath 2,
At the time of backwashing for cleaning the biological filter beds 14a, 14b, the backwash water is supplied from the backwash water channels 56a, 56b different from the circulation channel 4 at the time of purification, and the backwash water channels 56a, 5b.
A nozzle 58 for generating a vortex is attached to 6b. As a result, even if the amount of backwash water is small, the backwash water can be sprayed onto the particles 54 inside the biological filter tanks 14a and 14b without weakening the momentum, and the particles 54 can be evenly stirred. become.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification unit for purifying sewage water such as bath water using a biological filter bed tank, and in particular, it has a function of cleaning the inside of the biological filter bed tank with the waste water to be purified. Regarding improvement of purification unit.

[0002]

2. Description of the Related Art The applicant of the present application considers a purification unit of this type used for purification of bath water, for example. In the purification unit in this case, a circulation pump, a filtration tank, and a biological filter bed tank are sequentially arranged in the middle of the circulation path for circulating the bath water connected to the bath, and the circulation pump pumps hair, dust, dust, Inhale bath water containing soap, etc., remove body hair, dust, dirt, etc. in the filtration tank, then remove the soap content and organic substances that are nutrient sources of microorganisms in the biological filter bed at the next stage and send out into the bath, By repeating this, the water in the bathtub is purified, and various bacteria are prevented from propagating in the bathtub to prevent the water in the bathtub from becoming turbid or dirty.

The biological filter bed has a structure in which a large number of particles for curing microorganisms are contained in the container in the first place, and the microbial film adhered to the particle group increases with the course of use and becomes larger than necessary. Then, the purifying ability is lowered, so that it is preferable to separate the microbial membrane from the particle group to regenerate it.

As this regeneration, a so-called backwash process is performed in which the water to be purified in the bathtub is passed through the biological filter bed in the direction opposite to the purification direction, that is, the inside of the biological filter bed is washed by passing from below to above. There is. In this backwashing process, when the water to be purified in the storage tank is passed through the biological filter tank, the same circulation path as that used for purification is usually used, and no special measures are taken.

[0005]

By the way, in the above-mentioned backwashing process, the introduced backwashing water is buffered with the internal water of the biological filter tank, so that the momentum is easily weakened. Therefore, when the amount of backwash water can be increased, almost all particle groups can be entrained and stirred, so a sufficient cleaning effect can be obtained, but when the amount of backwash water is small, the biological filter bed can be used. Since it becomes difficult to stir by entraining the particle group located in the corner of the tank, this unstirred particle group becomes anaerobic and eventually adheres to the inner wall of the biological filter bed tank, the partition, etc. It may cause a bad odor.

In view of the above circumstances, it is an object of the present invention to make it possible to efficiently clean the inside of a biological filter tank to every corner even with a small amount of backwash water.

[0007]

In the first purification unit of the present invention, the purification target water is once taken out from the purification target water storage tank and passed through the biological filter tank from the upper side to the lower side to be returned to the storage tank. In addition to the function of purifying the water to be purified by
In the purification unit having a function of cleaning the inside of the biological filter bed by passing the water to be purified of the storage tank through the biological filter bed from the lower side to the upper side, the biological filter bed has a large number of water in the vertical direction of the container. A partition with perforations is provided and a large number of particles are mounted on this partition, and, in addition to the circulation path for returning the water to be purified in the storage tank to the storage tank through the biological filter bed tank, A configuration is provided in which a backwash-dedicated introduction pipe is provided to reach the front of the internal partition from below the filter bed tank and introduce the water to be purified in the storage tank as backwash water.

A second purification unit of the present invention is the first purification unit, which is provided with a nozzle which is connected in communication with an introduction pipe dedicated to backwashing and injects backwashing water into a particle group as a swirl flow. did.

In the third purification unit of the present invention, the purification target water is once taken out from the purification target water storage tank and passed through the biological filter bed from above to below to be returned to the storage tank. In addition to the function of purifying, in the purification unit having the function of cleaning the inside of the biological filter bed tank by passing the purification target water of the storage tank to the biological filter bed tank in the opposite direction from the same circulation path as when cleaning The filter bed tank is a configuration in which a large number of holes are provided in the middle of the container in the vertical direction, and a large number of particles are mounted on this partition, and below the partition inside the biological filter bed tank, The backwash water introduced during the backwash was sprayed toward the particle group side above the partition to agitate the particle group.

The fourth purifying unit of the present invention is the first or third purifying unit in which the backwash water injected from the backwash water introducing pipe or the nozzle is upward through a predetermined gap above the partition. A guide cylinder for guiding to is provided.

[0011]

In the first purification unit, the backwash water can be directly collided with the particle groups on the partition by the backwash water inlet pipe dedicated to the backwash, which is different from the circulation path at the time of purification.
Even with a small amount of backwash water, the backwash water can be vigorously jetted to the particle group.

In the second purification unit, the backwash water introduced from the backwash water introducing pipe of the first purification unit can be jetted into the particle group as a vortex by the nozzle.
The stirring action is further improved as compared with the case of the first purification unit.

In the third purification unit, the backwash water introduced by the nozzle can directly collide with the particle group on the partition even if the circulation path at the time of purification is used. Backwash water can be vigorously jetted to the particle group even with the amount of wash water.

In the fourth purification unit, the backwash water from the backwash water introduction pipe of the first purification unit or the nozzle of the second purification unit passes through the guide tube, whereby the backwash water is introduced into the guide tube. Since the surrounding particles are caught, the stirring action is further enhanced as compared with the case of the first or second purification unit.

[0015]

1 to 3 show one embodiment of the purification unit of the present invention. Here, a case where the purification unit is used for purification of bath water, for example, and a case where the purification water channel for the biological filter tank and the backwash water channel are separate will be described as an example.

In the figure, reference numeral 1 denotes the entire purification unit, 2 is a bath (reservoir), and 4 is a circulation path connected to the bath 2 for circulating bath water to be purified. Then, in the middle of the circulation path 4, the circulation pump 6, the water passage valve 8, the filtration tank 10, from the suction side to the discharge side of the bath water,
Two three-way valves 12a, 12b, a pair of biological filter beds 14
a, 14b, the sterilization device 16, the heat retention device 18, the water flow sensor 20, and the water passage valve 22 are sequentially arranged.

The filtration tank 10 is constructed by filling glass beads or the like in a container to remove relatively large suspended matter such as hair, dust and dirt. Biological filter bed 14
The a and 14b are adapted to remove organic matter such as fine dust and soap by the microorganisms that naturally adhere to the surface of the particles. A pair of biological filter beds 14a and 14b are provided in order to increase the removal efficiency of organic substances by making the flow velocity in each tank gentle. Sterilizer 1
Reference numeral 6 denotes, for example, a configuration using an ultraviolet lamp, the heat retention device 18 is for keeping the temperature of bath water constant, and the water flow sensor 20 is for detecting the presence or absence of water flow in the circulation path 4. For example, a rotary flow meter or the like is used.

The above filter tank 10 and each biological filter bed tank 14
Drainage means 24 for draining hot and cold water in each tank is connected to each bottom of a and 14b. This drainage means 24
In this example, the valves 26, 28a, 2 are individually provided in the backwash water channels 56a, 56b provided between the tanks 10, 14a, 14b and the circulation channel 4, and the drain channel branched from the circulation channel 4, respectively.
It is configured by interposing 8b and 30. Further, a water replenishing means 32 for supplying clean water to each of the biological filter beds 14a and 14b is connected to the upper part of the tank. In this example, the water replenishment means 32 is configured by providing a water replenishment valve 34 and a hopper 36 in the middle of the water replenishment passage connected to the water supply pipe, and connecting this water replenishment passage to the three-way valves 12a and 12b. .

Numeral 38 is a drain valve used for discharging backwash water during backwashing in which bath water is flushed with the filter tank 10 in the direction opposite to the purification direction, and 42 is a biological filter bed tank 14a, 1
4b is a drain valve used for discharging backwash water during backwashing in which bath water is washed in a direction opposite to the direction of purification.

Reference numeral 40 is a controller which is composed of, for example, a microcomputer and includes the control means in the claims. The controller 40 executes at least a steady operation, a backwash operation of the filtration tank 10, a backwash operation of the biological filter beds 14a and 14b, and a special operation when the purification capacity of the biological filter beds 14a and 14b is started. Therefore, it controls the operation of various components.

The biological filter bed tank 14a, which is a feature of this embodiment,
As shown in FIG. 2, in 14b, a large number of partitions 52 having holes are attached in the vertical direction of a substantially cylindrical container 50, and a large number of particles 54 such as activated alumina are mounted on the partitions 52. It has a different structure. Then, the circulation side pipe of the circulation path 4 is provided in the center of the bottom surface of the container 50, and the backwash water passages 56 a, 5 as backwash water introduction pipes are provided near the outer periphery of the bottom surface of the container 50.
6b are attached respectively. This backwash waterway 56
The a and 56b are inserted so as to reach directly below the partition 52 of the container 50.
A nozzle 58 for generating a vortex is attached to the insertion end of b. The nozzle 58 extends so as to project to the surface of the particle group 54, and ejects backwash water toward a range of about 1/4 of the circumference of the inner wall of the container 50 to eject the particle 54.
It is branched into four so as to stir the group cyclically. As shown in FIG. 3, each of the branch portions of the nozzle 58 is formed in a flat shape with its opening gradually expanding toward the edge side, and the backwash water ejected from this branch is indicated by an arrow in FIG. As shown, it is sprayed diagonally over a wide range on the inner wall of the container 50. The nozzle 58 is
The particles 54 may be arranged in the middle of the group, and the shape and the number of branches are not particularly limited.

Next, the operation of the purification unit 1 having the above structure will be described. That is, the controller 40 continues the purification process of the bath water with the start of the operation, and the filter tank 10 and the biological filter tanks 14a and 14b are backwashed periodically during the process, and the biological filter is also washed. After backwashing the floor tanks 14a and 14b, a treatment for raising the purification capacity is performed.

(1) Steady-state operation The controller 40 opens the water passage valves 8 and 22, and opens the respective water valves 26, 28a, 28b, 30, 38, and the water passage valve 34.
Are closed, and the three-way valves 12a, 12
b is switched to the purification direction. Further, the circulation pump 6 is put into operation, and the sterilization device 10 is operated for a predetermined time (for example, 2 hours).
Every other time, it is intermittently operated for a predetermined time (for example, 6 minutes). This makes the water flow look like the solid arrow. That is, the hot and cold water sucked from the bathtub 2 enters the filtration tank 10 through the circulation pump 6 and the water passage valve 8 to collect hair, dust,
After the relatively large suspended matter such as dust is removed, the two biological filter beds 14a, 14a, through the two three-way valves 12a, 12b,
14b are each filled with water to remove fine dirt and organic matter such as soap, and further, after being sterilized by the ultraviolet sterilization device 16, they are heated by the heat retention device 18, and passed through the water flow sensor 20 and the water flow valve 22 to the bathtub. Returned to 2. This flow is repeated. During this operation period, the dissolved oxygen is naturally supplied into the biological filter tanks 14a and 14b by the operation of the circulation pump 6, so that the anaerobic state does not occur.

(2) Backwashing operation of the filtration tank In the above steady operation, the controller 40 closes the water passage valves 8 and 22 every predetermined time (for example, 24 hours).
The valve 26 and the drain valve 38 are set to the open state, and the three-way valves 12a and 12b are switched to the backwash direction. As a result, the water flow becomes like the one-dot chain arrow. That is, the hot and cold water sucked from the bathtub 2 is introduced into the filtration tank 10 only through the drain valve 26 in the direction opposite to that at the time of filtration, and the suspended matter inside is discharged through the drain valve 38. Then, when the built-in timer (for example, 90 seconds) of the controller 40 times out, the water passage valves 8 and 22 are opened and the valve 26 and the drain valve 3 are opened.
8 is closed, the three-way valves 12a and 12b are switched to the purifying direction, and the steady operation state is restored.

(3) Backwashing operation of the biological filter bed tank In the steady operation state, the controller 40 closes the water flow valves 8 and 22 and the valve 28a every predetermined time (for example, 60 days).
(Or 28b) and 42 are set to the open state,
The three-way valve 12a (or 12b) is switched to the backwash direction. As a result, the water flow becomes like the double-dashed line arrow.
That is, the hot and cold water sucked from the bathtub 2 passes through the valve 28a (or 28b) and the biological filter bed tank 14a (or 1).
4b) is supplied with water in the opposite direction to that during the purifying operation, and the organic matter inside the three-way valve 12a (or 12b) and the drain valve 4
It is discharged via 2. This processing is managed by, for example, a built-in timer of the controller 40, and a predetermined time (for example, 4
Minutes). In addition, the backwashing of the biological filter bed is alternated one by one, for example, if one biological filter bed has passed after a predetermined period,
Further, after a lapse of a predetermined period of time, the other biological filter bed tank is backwashed.

When the built-in timer of the controller 40 times out, the water passage valves 8 and 22 are opened and the valve 2 is opened.
8a (or 28b) and the drain valve 42 are closed,
The three-way valve 12a (or 12b) is switched to the purification direction, and the steady operation state is restored.

(4) Special operation After the special operation switch is turned on at the start of the initial operation of the purification unit or after the backwash operation of the biological filter tank is performed, the controller 40 performs the above-described steady-state purification operation except for the following points. Set to the same state as. The difference is the ultraviolet sterilizer 1
6 is set to a predetermined period t0 (for example, 2 days to 2 weeks), the on-time (irradiation time) is lengthened (for example, 1 hour is turned on every other hour), and then, for example, a predetermined time t1 (for example, 2 hours)
Every short time, for example, for a predetermined time t2 (for example, 6 minutes), it is turned on for a short time. In addition, you may make it always ON for the said predetermined period t0.

Biological filter beds 14a, 14 as in this embodiment
In b, in the above (3), even if the amount of backwash water is relatively small (for example, 20 liters / minute) so that the bath water is not reduced, the particles 54 in every corner can be surely involved and stirred evenly. As a result, the microbial film adhered and produced on almost all particles 54 can be efficiently separated. By the way, if the microbial membrane of the particles 54 is peeled off by this backwashing of the biological filter tank, the purification capacity will be deteriorated. Therefore, after performing the backwashing of the biological filter tank, the special operation of the above (4) should be performed. I am doing it.

By the way, the above-mentioned biological filter beds 14a, 14
In b, the nozzle 58 for generating the vortex may not be used. In this case, as shown in FIG. 4, it is preferable that the backwash water passages 56a and 56b, which serve as the backwash water introduction pipes, are arranged concentrically inside the circulation side pipe in the circulation passage 4. in this case,
Compared with the case of using the nozzle 58, the biological filter bed tank 1
Although the stirring action of the particles 54 of 4a and 14b is reduced,
The stirring action is improved compared to the conventional example. The inner ends of the backwash water channels 56a and 56b may be gradually reduced in diameter toward the front. In particular, in the case of FIG. 4, it is preferable to control the amount of backwash water introduced at the beginning to be gradually increased. Further, instead of the nozzle 58 for generating the vortex, as shown in FIG.
A cylindrical guide tube 60 that faces the backwash water channels 56a and 56b above the partition 52 of the biological filter beds 14a and 14b.
May be provided. In the case of FIG. 5, backwash water channels 56a, 5
Almost all of the backwash water introduced from 6b is a guide tube 6
As a result, the particles 54 inside will be blown upward. Further, as a result, the internal pressure of the guide cylinder 60 is lowered, so that the particles 54 around the guide cylinder 6 are prevented.
As a result of being caught inside 0, the groups of particles 54 will circulate inside and outside the guide cylinder 60, and the stirring action will be further improved.

6 and 7 show another embodiment of the purification unit of the present invention. In this embodiment, the biological filter bed tank 1
An example in which the purification water passage and the backwash water passage for 4a and 14b are common is given. That is, in this embodiment, a single biological filter bed tank 14 is used.
The middle of the circulation side pipe of the circulation path 4 connected to is connected to the suction side piping of the circulation path 4 by short-circuiting. An opening / closing valve 64 is provided in the middle of the short-circuit water passage 62, and the opening / closing valve 64 is controlled to be in a closed state at the time of purification and an open state at the time of backwashing. A nozzle 66 that gradually decreases in diameter upward is provided at a position below the partition 62 of the biological filter bed 14 and facing the connection portion of the circulation side pipe of the circulation path 4, and further the partition 66 is provided. A cylindrical guide tube 60 is provided at a position above 62 and facing the nozzle 66.

In this embodiment, the water flow at the time of purification is as shown by the solid arrow, the water flow at the time of backwashing the filtration tank is as shown by the one-dot chain line, and the water flow at the time of backwashing the biological filter bed is two points. It looks like a chained arrow. In this embodiment, when backwashing the biological filter bed, the force of the bath water taken out of the bath 2 is changed by the nozzle 6
6 is strengthened, and this strong backwash water is made to flow into the inside of the guide tube 60, so that the particles 54 around the guide tube 60 are entrained inside the guide tube 60. The group of particles 54 is made to circulate inside and outside.

The present invention is not limited to the above embodiment. For example, it can be used for purification of various sewage in addition to the one applied to purification of bath water.

[0033]

INDUSTRIAL APPLICABILITY According to the present invention, even if the amount of backwash water to be introduced into the biological filter bed tank is small, the backwash water is devised so as not to weaken the momentum of the backwash water and to spray the particles on the inside of the biological filter bed tank. Therefore, the particle groups in every corner of the biological filter tank can be surely caught and stirred evenly, and the microbial film adhered to and produced on almost all particle groups can be efficiently separated. As described above, in the purification unit of the present invention, it is possible to improve the reliability of the product such as improving the cleaning effect of the biological filter tank by using a small amount of backwash water, and it is possible to keep the running cost low. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a purification unit of the present invention.

FIG. 2 is a vertical sectional view showing a schematic configuration of a biological filter bed tank of the unit.

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

FIG. 4 is a view corresponding to FIG. 2, showing another example of the biological filter bed tank.

FIG. 5 is a view corresponding to FIG. 4, showing still another example of the biological filter bed tank.

FIG. 6 is a configuration diagram of another embodiment of the purification unit of the present invention.

FIG. 7 is a vertical sectional view showing a schematic configuration of a biological filter bed tank of the unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Purification unit 2 Bathtub 4 Circulation path 6 Circulation pump 14a, 14b Biological filter bed tank 40 Controller 50 Biological filter bed container 52 Biological filter bed partition 54 Biological filter bed particles 56a, 56b Backwash water path

Claims (4)

[Claims] 1. In addition to the function of purifying the purification target water by once taking out the purification target water from the purification target water storage tank and passing it through the biological filter bed from the upper side to the lower side to return to the storage tank, the storage tank A purification unit having a function of cleaning the inside of the biological filter bed tank by passing the water to be purified through the biological filter bed tank from the lower side to the upper side thereof, wherein the biological filter bed tank has a large number in the vertical direction of the container. A partition with perforations is provided, and a large number of particles are mounted on this partition, and, in addition to the circulation path for returning the water to be purified in the storage tank to the storage tank through the biological filter bed tank, A purification unit for backwashing, which is provided from below the filter bed tank to before the internal partition and introduces the water to be purified in the storage tank as backwash water. 2. The purification unit according to claim 1, further comprising: a nozzle which is connected to an introduction pipe dedicated to backwashing and is connected to the particle group to inject backwash water as a swirl flow. unit. 3. In addition to the function of purifying the purification target water by once taking out the purification target water from the purification target water storage tank and passing it through the biological filter bed tank from the upper side to the lower side of the biological filtration bed tank to return to the storage tank. A purification unit having a function of cleaning the inside of the biological filter bed tank by passing the water to be purified of the storage tank to the floor tank in the opposite direction from the same circulation path as when cleaning, wherein the biological filter bed tank is a container Is a structure in which a large number of perforated partitions are provided midway in the vertical direction, and a large number of particles are mounted on this partition, and is introduced below the partition inside the biological filter bed during backwashing. A purification unit, characterized in that a nozzle for jetting backwash water toward the particle group side above the partition to agitate the particle group is provided. 4. The purification unit according to claim 1 or 3, wherein a guide tube for guiding the backwash water injected from the backwash water introduction pipe or the nozzle upward through a predetermined gap above the partition. A purification unit characterized by being provided.