JPH09314148A - Method and apparatus for filtering cooling water, and for removing algae and fungus from cooling water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the propagation of alga and to prevent the generation of microorganisms by a method in which raw water is sterilized with silver ion in a process to introduce the raw water, the sterilized water is passed through a filtration tank of magnetic powder to be filtered utilizing the difference in passage speeds between impurities and water, and treated clarified water is reused. SOLUTION: Raw water (waste water), after being sterilized, is introduced to a container main body through a raw water introduction pipe 6. Silver ion is generated from silver electrodes 16, 17 installed at the base end of the pipe 6 for the sterilization. The raw water containing silver ion enters the container main body from a raw water inlet 2. The introduced raw water passes through a filtration tank 4 of magnetic powder. During the passage, water in the raw water passes between minute gaps in the tank 4 smoothly and almost in a moment to be filtered. The filtered raw water is led to piping 19 for clarified water, etc., to be discharged outside an apparatus. Occasionally, the clarified water is further clarified and deodorized and supplied to a cooling tower.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cooling water utilizing sterilizing treatment with sterilizing silver ions and filtration with magnetic powder.
The present invention relates to a method for filtering and removing algae, and a device therefor.

[0002]

2. Description of the Related Art Conventionally, raw water (reserved water, etc.) of a tank (tank connected to a cooling tower), a water tank, a storage device in a lake, a pond, etc. (hereinafter, in principle, the tank and the water tank will be mainly described). As raw water), the algae generated in the water can be removed by regularly cleaning and disinfecting tanks, water tanks, etc., or by using explosive oxygen in the water for open ponds. Work by supply, work by chemical treatment, and the like are known as conventional techniques.

Further, there are the following documents as prior art documents. (1) There is a sterilizing silver ion elution device disclosed in JP-A-61-38691. This invention is a hollow support made of an insulating material having a large number of water holes formed on the wall, and gold, silver,
A fine metal wire such as copper is coated with a sterilizing silver ion generating base material, which is a knitted fabric, a woven fabric or a non-woven fabric, and a synthetic resin material is used on the outer surface of the sterilizing silver ion generating base material. It is a structure in which it is covered with a protective net material made of a knitted fabric, a woven fabric or a non-woven fabric which is coarser than the generation base material.
(2) There is a bath circulating water heater disclosed in JP-A-5-104083. The present invention has a configuration in which hot water in a bathtub is introduced into a filter tank by a pump, the hot water is filtered, ozone gas is blown from an ozone generator to mix the gas and liquid, and the mixture is sterilized by filtration with a silver chloride plate and a filter medium.

[0004]

According to the above-mentioned technical documents, the sterilization treatment of raw water is limited to the sterilization treatment using silver ions or ozone gas, and impurities are positively removed by using magnetic powder that can be backwashed. It is not intended to do so, or by using simple and reliable operation and means, the growth of algae is prevented and the generation of microorganisms is prevented (hereinafter referred to as sterilization treatment).
In addition, the raw water is not sterilized quickly and efficiently.

Further, in the above-mentioned technical literature or the silver ion sterilization treatment technique which has been generally used conventionally, there is a problem that silver chloride is apt to adhere to the electrodes and reliable and stable generation of silver ions cannot be expected.

[0006]

The present invention stabilizes the generation of silver ions by efficiently eliminating impurities or by alternately energizing a pair of electrodes to operate the electrodes efficiently. In order to avoid the generation of algae and enhance the bactericidal effect as a result, the following configuration is adopted.

That is, the cooling water of the present invention is filtered and algae removed.
The bacterial method is a raw water introduction step of introducing raw water such as circulating water in a tank or a tank, a sterilization step of sterilizing the raw water with silver ions in the raw water introduction step, and a sterilization treatment of the sterilization step. A filtration treatment step in which water is passed through a filtration layer made of magnetic powder, and filtration is performed by utilizing the difference in passage speed between impurities and water in the sterilized water, and this filtration treatment.
And a reuse step of returning the clarified water treated in the step to the tank, the water tank or the like.

Further, according to the present invention, when clogging of the filtration layer occurs, backwashing can be performed by utilizing the switching of the valve and the compression / release of the air stored in the container body, which facilitates reuse.
The following configuration is adopted for the purpose of improving operability.

That is, the cooling water of the present invention is filtered and algae removed.
The bacteria device is a raw water introduction pipe connected to a tank, a tank, etc.,
A pair of raw water introducing pipes that generate silver ions
A container body having a silver electrode and a raw water inlet to which the raw water introduction pipe is connected, a through hole provided in the container body for passing clear water, and a fining device for discharging the clear water or the like to the outside of the container body. It is composed of a pipe for water or the like, a clear water discharge pipe to which the pipe for clear water or the like is connected, and a filter layer made of magnetic powder provided on the pipe for clear water or the like.

Further, in order to improve the water quality of the raw water, to stabilize the water quality, or to filter the water quality while removing the algae generated in all the devices, the following constitution is adopted.

That is, the cooling water of the present invention is filtered and algae removed.
The bacteria device is a raw water introduction pipe connected to a tank, a tank, etc.,
A pair of raw water introducing pipes that generate silver ions
A container body equipped with a silver electrode and a pump, a raw water introduction port to which the raw water introduction pipe is connected, a through hole provided in the container body through which clear water passes, and the clear water and the like are discharged to the outside of the container body. For clear water, etc., a connecting pipe for connecting the clear water, etc. pipe and the raw water introducing pipe, a switching valve provided in a connecting portion between the connecting pipe and the raw water introducing pipe, and the clear water, etc. It is composed of a clear water discharge pipe to which a pipe is connected, and a filter layer made of magnetic powder provided in the clear water pipe or the like.

[0012]

Next, the operation of the present invention (magnetic permeability of impurities in raw water and filtration of raw water) will be described. First, as a preliminary step, a magnetic powder filtration layer is formed in the container body. Specifically, a magnet body (including various magnets such as a permanent magnet and an electromagnet).
A magnetic powder filtering layer (including a magnetic powder filtering layer such as a magnetic powder filtering layer, etc.) is provided around the magnet body and the spacer through the magnetic force. Form. That is, in principle, a filter layer made of magnetic powder is formed in advance before raw water is supplied into the container body. After the filtration layer made of magnetic powder is formed as described above, raw water is introduced into the container body.

That is, the used raw water (dirt water) that has reached the circulation tank (storage tank) from the cooling tower is introduced into the container body via the raw water introduction pipe, but is sterilized before this introduction. Explaining one example of this sterilization treatment, a silver electrode for generating silver ions, which is alternately energized, is provided at the base end of the raw water introducing pipe, and this silver electrode is used as, for example, an anode and a cathode.
By alternately energizing the electrodes, the salt on the silver electrode
Prevents silver halide from adhering to efficiently generate silver ions.
The raw water mixed with this silver ion is the raw water inlet pipe
To the rear end, and then opened the clear water valve and
Raw water conduction through pumping and operation of three-way switching valve
Enter the container body from the inlet. At this time, the drain valve / outside
The introduction valve is closed.

As described above, the raw water introduced into the container body passes through the filter layer made of magnetic powder. During this passage, the water in the raw water becomes a very small amount of the filter layer made of magnetic powder. It passes through the gap smoothly and almost instantly, and is filtered by the filtration layer made of the magnetic powder. A so-called separation action of raw water and impurities is performed. Then, the filtered treated raw water is then guided to the pipe for the clear water or the like through the passage and the filtration layer provided in the spacer, and the clear water is passed through the through hole of the pipe for the clear water or the like. Introduced into the equalizing pipe. After that, the water is discharged to the outside of the apparatus from the clear water discharge port of the clear water pipe or the like through the clear water discharge pipe. Of course,
The filtered clear water may be filtered by magnetic powder in some cases.
The clear water is further clarified and deodorized by utilizing the action etc.
Supplied to the cooling tower. On the other hand, impurities such as dust and algae contained in the raw water cannot pass through the minute gaps of the filter layer made of the magnetic powder, and are usually on the surface of the filter layer made of the magnetic powder or slightly inside the surface. Layered or scattered and attached (hereinafter, simply referred to as layered). Then, in principle, the raw water successively introduced into the container body is treated by substantially the same operations and procedures as described above, and so-called raw water filter sterilization and algae removal work are continued.

When the filter layer is clogged, the original
The pressure sensor installed in the water inlet pipe detects pressure above the set value.
Since it will come out, operate the three-way switching valve to connect to the raw water introduction pipe.
Stop the introduction of raw water. To explain the procedure of the operation
(This is an example.) First, when the pump is turned off
Then open the clear water valve and drain valve, and
At the same time, the three-way switching valve is switched to clarify the inside of the container body.
Eliminate water or raw water. However, in this container body
Leave some clear water or raw water required for. Then the outside air
Open the introduction valve to let outside air into the space of the container body.
Introduce (air) or add extra clean inside this container body.
If clear water or raw water remains, open the drain valve.
Then, the clear water or raw water is discharged. Next, outside air conduction
Pump with the inlet and drain valves closed.
Repeat ON and OFF. As a result, the clear water or
The raw water is in the magnetic powder, or through holes or spaces in the clear water piping.
Enter and leave between the passages of the sir, inside this magnetic powder, clear water, etc.
Stays in or attaches to the through hole of the piping for piping or the passage of the spacer
Contaminants should be removed from the magnetic powder, through holes in piping for clear water, or
Discharge to the outside of the passage of the spacer, that is, this magnetic powder, clarification
Clear the clogging of water passages or spacer passages.
Be erased. Repeatedly turning this pump on and off,
Magnetic powder, clear water, etc.
Clear the clogging of the road. And this clogging (removal
(Dust) When the work to eliminate the dust is completed, turn on the pump.
In addition, open the drain valve to discharge the waste water to the outside of the equipment.
You. So-called backwashing. As described above, clogging
If the problem is resolved, return to the first introduction of raw water.

Of course, the above-mentioned washing and / or backwashing can be used.
Even if the clogging is not resolved, disassemble the container body, etc.
And deal with it.

[0017]

An embodiment of the present invention will be described below with reference to the drawings.

The filtration apparatus A of the present invention comprises a container body 1, a raw water introduction pipe 6 and a clear water discharge pipe 14 connected to the container body 1, a filtration layer 4 installed in the container body 1, and a pair thereof. The electrodes 16 and 17 of FIG.

The container body 1 is internally provided with a filtration layer 4 made of magnetic powder, which will be described later, having a raw water inlet 2 and a clear water outlet 3, and the raw water inlet 2 of the container body 1 has three sides. A raw water introduction pipe 6 having a switching valve 5 is connected. Therefore, when the three-way switching valve 5 is operated to introduce the raw water as shown by the solid line 1 in FIG. 2, the raw water rises along the solid line 1 and is then introduced into the container body 1 via the raw water introduction port 2. . The subsequent process will be described later. The three-way switching valve 5 is operated and the clear water valve 7 provided in the raw water introducing pipe 6 is closed. A pump 9 is provided in a connecting pipe 8 which connects the raw water introducing pipe 6 and a pipe for clarifying water, which will be described later, and the pump 9 is used to make clear water or raw water remaining in the container body 1 , Clear water), and as described above, move the clear water (in the magnetic powder , clear water).
Entry and exit between the passages of the clear water piping or the spacer passages.
Te), the magnetic powder inside, through holes or space plumbing fining water, etc.
Clear the clogging of the passage of the user. That is, the filter described below
Wash the overlayer 4. In this way, pressure is applied to the clear water.
When applied, the excessive pressure rise in the container body 1
In order to avoid it, an air chamber 10 is provided in the container body 1.
Is provided. 11 in the figure is drainage provided in the container body 1.
This drain pipe 11 is provided with a drain valve 12
ing. By opening this drain valve 12,
The pipe 11 is used to remove sewage or foreign substances in the container body 1.
Drain outside. 14 is connected to the clear water outlet 3
It is a clear water discharge pipe. 15 is provided in the clear water discharge pipe 14.
It is a pressure sensor. In addition, the electrodes 16 and 17 are provided in the raw water introduction pipe 6 and are configured to be alternately energized. For example, in the case of the silver ion electrodes 16 and 17, by alternately energizing the silver ion electrodes 16 and 17,
To prevent silver from adhering to the surface and efficiently generate silver ions
And

Reference numeral 19 is a pipe for clarifying water or the like which is erected on the container body 1. A large number of donut-shaped spacers 183 are provided on the outer peripheral surface of the pipe for clarifying water 19 via mounting means 181 and 182. It is composed of a large number of donut-shaped magnet bodies 184 (permanent magnets, electromagnets, etc.) provided between the spacers 183, and magnetic powder 185 is magnetized between the spacers 183 and the magnet bodies 184. The magnetic powder 185 is attached and is protected by a net 186 (an example). This filled magnetic powder 185
Form the filtration layer 4. Further, a large number of through holes 191 through which clear water and the like can pass are formed in the clear water and the like pipe 19 (the shape, the number, etc. are not limited). The spacer 183 is provided with a passage 183a through which clear water / impurity particles or backwash water passes. Therefore, the container body 1
The clear water filtered through the filtration layer 4 (referred to as a filtration layer) from the space 18 formed by the spacer 183 and the magnet body 184 is the passage 183a → the filtration layer 4 → the through hole 191 → the clear water. The water is discharged to the outside of the apparatus via the piping 19 for the clear water, the clear water discharge port 3, and the clear water discharge pipe 14. The spacer 183 and the magnet body 184 are examples, and any structure may be used as long as the magnetic powder 185 or the like can be magnetically attached to the peripheral surface of the spacer and the raw water can be filtered. For example, there is a configuration in which porous pores are opened in the magnet cylinder and the clear water is guided to the clear water piping 19 through the porous body. Also, the dimensions of the magnet body 184, the spacer 183, the magnetic powder 185, etc.,
The shape, the magnetic density, the layer thickness, and other configurations are appropriately changed. In the figure, 20 is an air introduction pipe, 21 is this air introduction pipe 2
The external air introduction valve provided at 0 is shown. 22 is a lid,
Reference numerals 23 denote bottom plates, respectively.

Filtration device A constructed as described above
5 is mainly connected to the cooling tower B via a circulation tank C (raw water storage tank) as shown in FIG. 5, and the treated wastewater of the cooling tower B is connected to the pipe D and the circulation tank C.
It is supplied to the filtration device A from the raw water introduction pipe 6 via the pipe E, and then sterilized and filtered as described above. The sterilized and filtered clear water is returned to the cooling tower B through the clear water discharge pipe 14 and the pipe F (shown by the solid line 2) and used. It is reused by a so-called circulation processing route. The sludge water or the polluted water is sent to the pit H through the drain pipe G.

[0022]

As described above, according to the present invention, the container body is provided with a filtration layer made of magnetic powder, and raw water sterilized with silver ions (sterilized raw water) is introduced into the container body to obtain the sterilized raw water. The impurities are removed by the filtration layer. Therefore, wastewater from tanks (cooling tanks) can be reused as clarified water by sterilizing and filtering it, and due to the action of silver ions contained in the clarified water, algae, etc.
It has the effect of helping prevent the generation of microorganisms. Also, it effectively acts on the decomposition process of rust generated in the tank and the like.

Further, the pressure sensor and the pump provided in the pipeline and the three-way switching valve are used for cleaning and / or backwashing. Therefore, the filter layer can be easily and smoothly washed or backwashed, and there is little vibration and noise, and no secondary pollution occurs. Moreover, since the device is simple, there are few failures. Or, it has a real benefit that can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a schematic view showing an overview of the present invention.

FIG. 2 is an overall schematic diagram of a main part of the present invention.

FIG. 3 is an enlarged sectional view of an essential part for explaining a filter layer of magnetic powder.

FIG. 4 is an enlarged main part front view for explaining a filter layer of magnetic powder.

FIG. 5 is an enlarged partial cutaway plan view showing a relationship between a spacer and a pipe for clarifying water or the like.

[Explanation of symbols]

 1 Container body 2 Raw water inlet 3 Clear water outlet 4 Filtration layer 5 Three-way switching valve 6 Raw water inlet pipe 7 Clear water valve 8 Connection pipe 9 Pump 10 Air chamber 11 Drain pipe 12 Drain valve 14 Clear water discharge pipe 15 Pressure Sensor 16 Electrode 17 Electrode 18 Spacer 181 Attachment means 182 Attachment means 183 Spacer 183a Passage 184 Magnet body 185 Magnetic powder 186 Net 19 Pipe for clear water 191 Through hole 20 Air introduction pipe 21 Outside air introduction valve 22 Lid 23 Bottom plate A Filtration device B Cooling tower C Circulation tank D Pipe E Pipe F Pipe G Drain pipe H Pit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location C02F 1/50 531 C02F 1/50 531E 560 560Z

Claims (3)

[Claims] 1. A raw water introduction step of introducing raw water such as circulating water in a tank, a water tank, etc., a sterilization step of sterilizing the raw water with silver ions in the raw water introduction step, and a sterilization treated in this sterilization step A filtration treatment process in which treated water is passed through a filtration layer made of magnetic powder, and filtration is performed by using the difference in the speed of passage of impurities and water in the sterilized treatment water
And a reuse step of returning the clarified water treated in the filtration treatment step to the tank, the water tank, or the like, and a method for filtering, removing algae and disinfecting cooling water. 2. A raw water introducing pipe connected to a tank, a water tank, etc., and a pair of raw water introducing pipes for generating silver ions installed in the raw water introducing pipe.
A container body having a silver electrode and a raw water inlet to which the raw water introduction pipe is connected, a through hole provided in the container body for passing clear water, and a fining device for discharging the clear water and the like outside the container body. A pipe for water and the like, a clarified water discharge pipe to which the pipe for clarified water and the like is connected, a filter layer made of magnetic powder provided on the pipe for clarified water and the like, and filtering and removing cooling water. Algae / bactericidal device. 3. A raw water introducing pipe connected to a tank, a water tank, etc., and a pair of raw water introducing pipes for producing silver ions.
A container body having a silver electrode and a pump, a raw water introduction port to which the raw water introduction pipe is connected, a through hole through which clear water passes in the container body, and the clear water is discharged to the outside of the container body. A pipe for clarifying water, a connecting pipe for connecting the pipe for clarifying water and the raw water introducing pipe, a switching valve provided at a connecting portion between the connecting pipe and the raw water introducing pipe, and for the clear water etc. A cooling water filtering, algae removing and sterilizing apparatus comprising: a clear water discharge pipe to which a pipe is connected; and a filter layer made of magnetic powder provided in the clear water pipe.