JP2002001392A - Cleaning treatment equipment for cooling water in cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cleaning treatment equipment for cooling water in a cooling tower, having a simple structure, the maintenance/control of which can easily be performed and capable of performing cleaning treatment at low cost. SOLUTION: This equipment is provided with: a purification circulation means 25 having a circulation pipe 27 the both ends of which are connected to the cooling tower bottom 7 for storing cooling water 6 of a cooling tower 1; a first purification treatment section 57 in which a sand filtration device 35 and a silver treatment means 50 having a silver catalyst 52 received within, are connected in series to a first circulation passage 28 branched from the circulation pipe 27; and a second purification treatment section 65 in which a potential treatment device 68 capable of causing potential difference is received and which is connected to a second circulation passage 29 branched from the circulation pipe 27 and placed in parallel to the first purification treatment section 57; wherein the second purification treatment section 65 is provided with an activation layer 69 packed with a fired material consisting essentially of tourmaline, an alkali feldsparthic mineral, iron oxide and manganese oxide. Thus, the first and second purification treatment processes using different flow rates of the cooling water from each other, can efficiently and easily be performed with the equipment having a simple structure, or more specifically, with the first and second purification treatment sections 57 and 65 respectively, and maintenance/control of the equipment can be performed without temporarily stopping the purification treatment operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for purifying cooling water in a cooling tower which circulates through a cooling tower to purify cooling water cooled by heat of vaporization.

[0002]

2. Description of the Related Art Conventionally, a cooling tower which circulates cooling water and cools it by heat of vaporization during the circulation, sprays the circulating cooling water onto a packed bed having a large surface area, makes contact with the outside air and cools it by the heat of vaporization. Microorganisms, such as algae and bacteria, in the breeding, clogging of the packed bed, and give off odor. In addition, when a cooling tower is used, if multiple cooling towers are installed to increase the cooling efficiency of the cooling water in factories, etc., the cooling water is circulated through a separate water tank, etc. It is easily suspended, and is suspended due to corrosion of pipes, and scale is generated in pipes, cooling towers, and the like. from these things,
It is necessary to periodically clean the inside of the cooling tower, and there is a problem that maintenance management is complicated and costs increase.

[0003] Therefore, it is also known to add various chemicals to prevent the growth of microorganisms or to suppress the generation of scale.

[0004]

However, in a configuration in which a chemical is added, since the cooling water is scattered by water spray or the like, the chemical is also scattered in the outside air, which may contaminate the environment around the cooling tower and reduce costs. There is a problem that increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above problems. It is intended to provide a device.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for purifying a cooling water in a cooling tower, wherein the cooling water is circulated and cooled by a heat of vaporization. A water purification treatment device, comprising: a purification circulating means for circulating the cooling water; a filtration means provided in the purification circulating means for removing suspended substances mixed into the cooling water; and a series of the filtration means. Silver processing means for connecting at least a part of the cooling water from which the suspended matter has been removed to a silver catalyst containing silver, and the cooling water connected to the purification means in parallel with the filtration means so that the cooling water Potential treatment means provided with a metal tube which is in contact with corrosion resistant and accommodates minerals to generate a potential difference, and activation means containing tourmaline which is connected in series to the potential treatment means and which contacts the cooling water. What A.

[0007] Then, a part of the cooling water flowing from the cooling tower through the circulating means for purification is removed by a filtering means to remove suspended substances, and is brought into contact with a silver catalyst of a silver processing means for sterilization and algicidal treatment. Return and remove suspended substances such as dust invading from the outside to prevent the growth of microorganisms that cause scale formation due to off-flavors, blockages, and adhesion of inorganic substances to cooling towers and purification circulation means. The remaining part of the cooling water flowing through the circulating means is brought into contact with the corrosion-resistant metal tube containing the minerals of the potential treatment means to generate a potential difference and the tourmaline of the activation means, and the potential difference by the potential treatment means and the weak electricity by the tourmaline Activates the cooling water, suppresses the formation and growth of inorganic crystals such as calcium and silica in the cooling water, and prevents corrosion that causes the formation of scale such as cooling towers and circulating means for purification. . As a result, maintenance and management of the cooling tower and the circulating means for purification are easy, the environment is improved by preventing an unpleasant odor, the cooling efficiency is improved by preventing blockage, the consumption of cooling water is reduced, and Is also unnecessary,
Operating costs are reduced. Further, the flow rate of the cooling water flowing through the potential processing means and the activating means is, for example, compared with the case where the total amount of cooling water flows for about 0.2 hours and contacts the potential processing means and the activating means as much as possible. The flow rate of the cooling water flowing through the filtering means may be such that the amount of the entire cooling water flows in one hour because the cooling water is not so dirty. Thereby, since the potential processing means and the activating means are connected in parallel to the filtering means, it is possible to efficiently divide the cooling water without increasing the pressure loss due to the filtering means and to perform a high purification treatment, The control of the advanced purification process corresponding to the quality of the cooling water to be treated becomes easy, and the maintenance and management of the other side can be performed without interrupting the purification process of the cooling water by circulating only one side.

According to a second aspect of the present invention, there is provided an apparatus for purifying cooling water in a cooling tower, wherein the activating means comprises an alkali feldspar-based mineral. .

The activating means contains an alkali feldspar-based mineral which is easy to handle and easy to collect. In this way, the activation of the cooling water by tourmaline and the ionization of inorganic substances in the cooling water by the ionization of alkali feldspar minerals prevent the generation of scale and corrosion, and the suspension of suspended particulates and rust. To purify the cooling water with high transparency.

According to a third aspect of the present invention, there is provided an apparatus for purifying cooling water in a cooling tower, wherein the cooling water is circulated and cooled by heat of vaporization. There is a purifying circulating means for circulating the cooling water, a filtering means provided in the purifying circulating means for removing suspended substances mixed into the cooling water, and the suspended substance connected in series to the filtering means. Silver processing means for bringing at least a part of the removed cooling water into contact with a silver catalyst containing silver, and the cooling water is connected in parallel with the filtering means to the purification circulating means so that the cooling water comes into contact with the outer surface and has corrosion resistance. A potential treatment means provided with a metal tube which accommodates the mineral and generates a potential difference; and an activation means containing an alkali feldspar-based mineral which is connected in series to the potential treatment means and in contact with the cooling water. .

Then, a part of the cooling water flowing through the circulating means for purification from the cooling tower is removed by a filtration means to remove suspended substances, and is brought into contact with a silver catalyst of a silver processing means for sterilization and algicidal treatment. Return, prevent the growth of microorganisms that cause scale formation due to the adhesion of inorganic substances and odors to the cooling tower and purification circulation means, etc., and remove the remaining cooling water flowing through the purification circulation means to potential treatment means. The alkali feldspar-based mineral that is easy to handle and easy to collect by contacting the corrosion-resistant metal tube that contains the mineral and causing the potential difference and the alkali feldspar-based mineral of the activation means, activates the cooling water by the potential difference by the potential treatment means, In addition to suppressing the generation and growth of inorganic crystals such as calcium and silica in the cooling water, the cooling tower and purification circulation means To prevent corrosion causing scale formation also prevents damage due to corrosion. This allows
Easy maintenance and management of cooling towers and circulating means for purification, improvement of environment by prevention of unpleasant odor and improvement of cooling efficiency by prevention of blockage, reduction of cooling water consumption, no need for separate chemicals, Operating costs are reduced. Further, the flow rate of the cooling water flowing through the potential processing means and the activating means is, for example, compared with the case where the total amount of the cooling water flows in about 0.2 hours and contacts the potential processing means and the activating means as much as possible. The flow rate of the cooling water flowing through the filtering means may be such that the amount of the entire cooling water flows in one hour because the cooling water is not so dirty. Thereby, since the potential processing means and the activating means are connected in parallel to the filtering means, it is possible to efficiently divide the cooling water without increasing the pressure loss due to the filtering means and to perform a high purification treatment, The control of the advanced purification process corresponding to the quality of the cooling water to be treated becomes easy, and the maintenance and management of the other side can be performed without interrupting the purification process of the cooling water by circulating only one side.

According to a fourth aspect of the present invention, there is provided an apparatus for purifying cooling water in a cooling tower according to any one of the first to third aspects, wherein the silver processing means contains copper. Things.

Then, copper is contained in the silver processing means. This increases the bactericidal and algicidal activity of silver, provides high levels of bactericidal and algicidal properties even with trace amounts of silver and copper, prevents the growth of microorganisms, and reduces the formation of microorganism-based scales and off-flavors. Prevent efficiently.

According to a fifth aspect of the present invention, there is provided the cooling water purifying apparatus for a cooling tower according to any one of the first to fourth aspects. silver oxide ₂ -B ₂ O ₃ -Na ₂ O-based glass is one that was contained.

Then, Si is used as a silver catalyst in the silver processing means.
_{O 2 -B 2 O 3 -Na 2} O -based glass silver oxide used those contained. As a result, the silver catalyst slowly elutes into the cooling water over a long period of time, and the trace amount of silver ions dissolved in the cooling water efficiently prevents the growth of microorganisms, and prevents the generation of scales and off-flavors based on the microorganisms. I do.

According to a sixth aspect of the present invention, there is provided the cooling water purification apparatus for a cooling tower according to any one of the first to fifth aspects. It is provided with a granular fired product containing manganese as a main component.

Since the activated means is provided with a granular fired material containing iron oxide and manganese oxide as main components, chlorine in the cooling water reacts with water to cause hypochlorous acid (HClO).
This hypochlorous acid is decomposed into hydrochloric acid and oxygen ions that have strong bleaching and bactericidal actions due to changes in light and water temperature, and this oxygen ions prevent the growth of microorganisms and produce microorganism-based scales. In addition, it efficiently purifies cooling water by efficiently preventing off-flavors.

According to a seventh aspect of the present invention, there is provided an apparatus for purifying cooling water in a cooling tower according to any one of the first to sixth aspects. A nozzle connected to the downstream end for ejecting cooling water flowing through the purification circulating means, and cooling jetting by supplying cooling water in the cooling tower by jetting the cooling water from the nozzle; An ejection stirring means having an ejector section for ejecting water into the cooling tower together with water is provided.

At the downstream end of the purifying circulation means in the cooling tower, cooling water flowing through the purifying circulation means is jetted from the nozzle portion, and the cooling water jetted from the nozzle portion causes the cooling water inside the cooling tower to flow. A jet agitating means is provided for supplying cooling water at the ejector unit and jetting the cooling water again into the cooling tower together with the cooling water jetted from the nozzle unit. This allows
The entire amount of cooling water is efficiently purified.

The cooling water purifying apparatus for a cooling tower according to the eighth aspect of the present invention is the cooling water purifying apparatus for a cooling tower according to the seventh aspect, wherein a base end of the nozzle is connected to a purifying circulation means. The ejector portion is formed in a substantially cylindrical shape having a diameter larger than that of the nozzle portion, and the base end edge is formed at the distal end portion of the connecting portion projecting outward at the distal end portion of the nozzle portion. The base end is connected substantially coaxially with the nozzle portion so as to substantially oppose the distal end edge of the nozzle portion via a gap through which cooling water can flow.

A connecting portion projects outward from a distal end portion of the substantially cylindrical nozzle portion whose base end is connected to the circulating means for purification, and has a larger diameter than the nozzle portion at the distal end portion of the connecting portion. The jetting and stirring means is constituted by connecting the base end of the substantially cylindrical ejector section coaxially so that the base end is substantially opposed to the front end of the nozzle section via a gap through which cooling water can flow. Thus, the stirring efficiency of the cooling water in the cooling tower is improved with a simple structure, and the entire amount of the cooling water is efficiently purified.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a cooling tower according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a cooling tower. The cooling tower 1 has a body portion 4 having a substantially cylindrical shape, for example, a corrugated filler wound around the body to form a filling layer 3, At the lower end of the portion 4, there is a bottomed cylindrical bottom 7 which can open a vent 5 on the peripheral surface, close the lower surface, open the integrally provided upper surface and store cooling water 6. A main body 8 is provided.

A watering means 10 for spraying the cooling water 6 on the upper part of the filling layer 3 is provided above the body part 4 of the main body part 8.
Are arranged. Further, an exhaust fan 11 for exhausting the air in the main body 8 to the upper portion is provided at an upper portion of the body 4. The rotation of the exhaust fan 11 exhausts the air in the main body 8 upward, so that the air vent 5
The outside air is sucked into the main body 8 from above, and the sucked outside air is sucked upward while cooling the cooling water 6 sprayed through the space between the fillers by the heat of vaporization, and is exhausted by the exhaust fan 11.

At the approximate center of the bottom 7 of the main body 8, there is provided a concave water collecting recess 13 which opens upward. Further, a return means 14 for returning and circulating the cooling water 6 stored in the bottom 7 to the water sprinkling means 10 is connected to the bottom of the water collecting recess 13. The return means 14 includes a return pipe 15 having one end connected to the bottom of the water collecting recess 13 and the other end connected to the water sprinkling means 10. The return pipe 15 is provided with a compression means 16 for compressing the cooling water 6 flowing out of the water collecting recess 13. Further, the return pipe 15 is provided with a condenser 17 for condensing the cooling water 6 compressed by the compressor 16. The condensing means 17 is provided with a cooling pipe 18 for flowing cold water 17a such as cooling water for an air conditioner or cooling water for a physics and chemistry equipment.
The heat is exchanged with the evaporator 19 provided in the first stage. Then, the heat exchange means 20 is constituted by the condensing means 17 and the evaporator 19. The heat exchange means 20 includes a condensing means 17 and an evaporator.
A compressor 21 for a refrigerant cycle for circulating the refrigerant flowing between the compressor 19 and the compressor 19 is provided.

On the other hand, reference numeral 25 denotes a circulating means for purification. The circulating means 25 for purification is connected at one end to a water collecting body 26 disposed in the water collecting recess 13 of the bottom 7 of the cooling tower 1 and is cooled at the other end. A circulation pipe 27 connected to the bottom 7 of the tower 1 is provided. And the catchment
26 is formed in a box shape, for example, by a net that can pass water.

A circulation pipe 27 having one end connected to the water collecting body 26
Is branched into a first circulation path 28 and a second circulation path 29. The first circulation path 28 is provided with a first pump 34 via a first valve 31, a first check valve 32, and a first strainer 33. Further, the first circulation path 28 is provided with a sand filtration device 35 as filtration means located downstream of the first pump 34.

The sand filter 35 has a substantially hollow cylindrical shape with, for example, a lower case 36 having an open upper surface and an upper case 37 having an open lower surface which is removably and integrally connected to cover the upper surface of the lower case 36. The case body 38 is provided. A sand-filled layer 39 formed by filling sand is provided at an intermediate portion in the case body 38. The first circulation path 28 is located substantially above the sand-filled layer 39 of the case body 38 and is connected via a first three-way valve 41, and is located below the sand-filled layer 39 of the case body 38. Second three-way valve 42 and first on-off valve interlocking with first three-way valve 41
The cooling water 6 flows in from above the sand-filled layer 39 and flows out from below.

The sand filter 35 is provided with a backwashing means 45. That is, the backwash means 45 is a first three-way valve.
A backwash pipe 46 communicating between 41 and the second three-way valve 42;
In the case of purifying the cooling water 6, the cooling water 6 is supplied to the first three-way valve.
From 41, it flows above the sand filling layer 39, passes through the sand filling layer 39, circulates from the lower part of the case body 38 to the cooling tower 1 via the second three-way valve 42, and in the case of back washing, the cooling water 6 After flowing into the lower part of the sand-filled layer 39 from the second three-way valve 42 through the backwash pipe 46, the sand-filled layer
After passing through 39, it is discharged from the first three-way valve 41 through the drain pipe 47 together with the suspended matter trapped in the sand-filled layer 39.

Further, the first circulation path 28 is provided with a sand filtration device.
Silver processing means 50 is provided downstream of 35 and connected in series. The silver processing means 50 is configured such that a silver catalyst 52 is housed in a substantially cylindrical housing case 51. The first circulation path 28 is connected to one end of the storage case 51 via a first ball valve 53 located on the upstream side of the first opening / closing valve 43, and is connected to the other end of the storage case 51. Connected via a second ball valve 54 located downstream of the first on-off valve 43, at least a part of the cooling water 6 from which suspended matter has been removed by the sand filter 35 flows. That is, the first on-off valve 43 becomes a bypass. The storage case 51 is made of a silver catalyst.
A lid 55 is removably attached to the upper part for filling 52 and checking and cleaning the inside.

The sand filter 35 and the silver processing means 50 in the first circulation path 28 constitute a first purification processing section 57.

On the other hand, the second circulation path 29 has a second valve
A second pump 63 is provided via 61 and a second strainer 62. In the second circulation path 29, a second purification processing unit 65 located downstream of the second pump 63 and connected to the circulation pipe 27 in parallel with the first purification processing unit 57 is provided. Is provided. This second purification processing unit 65 has a lid
It has a substantially cylindrical main body case 67 having an opening (not shown) opened and closed by 66. In the main body case 67, a potential processing device 68 as a potential processing means is provided, and an activation layer 69 as an activation means containing tourmaline and alkali feldspar-based mineral (not shown) is provided. As a result, the potential treatment device 68 and the activation layer 69 are connected in series with the flow direction of the cooling water 6.

The potential processing device 68 includes a plurality of metal tubes formed of, for example, copper and titanium and mixed therein with different minerals (not shown).

The activation layer 69 is made of tourmaline, ie, a boron-containing cyclosilicate mineral (XY ₉ B ₃ Si ₆ O ₂₇ (O, OH, F) ₄ , (X: C
a, Na, K, Mn, Y: Mg, Fe, Al, Cr, Mn, Ti, Li)) and alkali-feldspar-based minerals, namely (Or (KAlSi ₃ O
₈ ) -Ab (NaAlSi ₃ O ₈ ) series) Granular or aggregate such as potassium feldspar (KAlSi ₃ O ₈ ), sodium feldspar (NaAlSi ₃ O ₈ ), anorthoclase, and iron oxide and manganese oxide as main components And a granular or lump-shaped fired material to be appropriately mixed.

Then, the second circulation path 29 is
Of the main case 67 and the potential processing device 68 and the activation layer 69 of the main body case 67 while being connected above the potential processing device 68 and the activation layer 69 via the second check valve 71 and the second on-off valve 72. It is located below and connected via a third on-off valve 73.

The second circulation path 29 merges with the first circulation path 28 and is connected to the bottom 7 of the cooling tower 1.

The downstream end of the circulation pipe 27 connected to the bottom 7 of the cooling tower 1 of the circulation pipe 27 is branched into a plurality of portions and connected to the peripheral surface of the bottom 7 at substantially predetermined intervals. A nozzle 80 is provided at each of a plurality of branched ends of the circulation pipe 27 as a jet stirring means.

As shown in FIG. 2, these nozzles 80 are provided with a male screw 81 which can be screwed to the end of the circulation pipe 27 on the outer peripheral surface of the base end, and the outer diameter of the nozzle 80 gradually becomes smaller toward the tip. Nozzle portion 82. A plurality of connecting portions 83 are provided on the outer peripheral surface of the distal end of the nozzle portion 82, for example, a plurality of radially outwardly projecting portions, for example, at four locations. Further, the nozzle 80 is formed in a substantially cylindrical shape in which the base end side is larger in diameter than the nozzle portion 82 and the inner diameter is smallest at a position closer to the base end side than the intermediate portion, and the base end edge is cooled to the tip end edge of the nozzle portion 82. An ejector portion 84 is provided at the distal end of the connecting portion 83, the base end portion of which is coaxially and integrally joined integrally with the connecting portion 83 in a state where the ejecting portion 84 is substantially opposed to each other with a gap into which the water 6 can flow.

Next, the operation of the above embodiment will be described.

First, while the exhaust fan 11 is driven to rotate, the compression means 16 of the return means 14 is driven, and the cooling water 6 in the bottom 7 of the cooling tower 1 is supplied via the return pipe 15 to the water sprinkling means 10 of the upper part.
The cooling water 6 is condensed by a condensing means 17 provided in a return pipe 15 so that the cooling water 6 is supplied to a cooling pipe 18 through which cold water 17a such as cooling water for an air conditioner or cooling water for physical and chemical equipment flows. And so that heat can be exchanged. Then, when the cold water 17a flows through the evaporator 19 by driving the air conditioner or the physics and chemistry equipment, the cooling water 6 exchanges heat with the cold water 17a and is sprayed from the water spraying means 10 to the packed bed 3. The cooling water 6 which is sprayed and drops on the packed layer 3 is contacted with the outside air sucked from the ventilation port 5 by the rotation of the exhaust fan 11 to exchange heat, and is dropped and circulated on the bottom 7 of the cooling tower 1. .

On the other hand, a part of the cooling water 6 stored in the bottom 7 of the cooling tower 1 is purified by the first purification processing section 57 and the second purification processing section 65 in parallel from the purification circulating means 25. Circulate.

That is, a part of the cooling water 6 is driven by the first pump 34 of the first circulation path 28 provided with the first valve 31 which is opened and closed by the opening and closing operation to cause the water collecting body 26 to drop leaves and the like. The first valve 31, the first valve 31,
Through the check valve 32 and the first strainer 33 to the first pump 34, and further flows into the sand filter 39 substantially above the sand filling layer 39 via the first three-way valve 41. The cooling water 6 that has flowed into the sand filtration device 35 is subjected to sand filtration to remove relatively small suspended substances such as suspended suspended substances, peeled scale fragments, and rust. Leaked to

Thereafter, the cooling water 6 flowing through the first circulation path 28 through the second three-way valve 42 at least partially opens the first ball valve 53 by opening and closing the first opening and closing valve 43. And flows into the silver processing means 50 via the first on-off valve 43. Then, the cooling water 6 flowing into the silver processing means 50 comes into contact with the silver catalyst 52 of the silver processing means 50. Due to the contact with the silver catalyst 52, microorganisms, algae, spores, etc. which are mixed in the cooling water 6 by the sterilization and algicidal action by silver and pass through without being filtered by the sand filtration are removed, and the first downstream side is removed. The gas flows through the circulation path 28 via the second ball valve 72. In the case of maintenance and inspection such as replenishment of the silver catalyst 52 and cleaning of the storage case 51, the first ball valve 53 and the second ball valve 54 are closed and the cooling water 6 is supplied to the first opening / closing valve 43. What is necessary is just to bypass and distribute.

The flow rate of the cooling water 6 flowing through the first purification processing section 57 of the first circulation path 28 by driving the first pump 34 is such that the entire amount of the cooling water 6 passes in about one hour. Set. That is, the cooling water 6 is relatively hard to be contaminated, and when the flow rate is too large, the flow resistance increases and the load is applied to the first pump 34, the operating energy increases, and the operating cost increases. Since the suspended matter cannot be removed any more, the flow rate of the entire amount of the cooling water 6 is set to pass through the first purification processing section 57 of the first circulation path 28 in about one hour. It is to be noted that the present invention is not limited to the case where the first pump 34 is continuously driven and the cooling water 6 is continuously processed by the first purification processing unit 57. Intermittent operation such as processing may be used.

When the sand-filled layer 39 of the sand filtration device 35 starts to be clogged by the long-term purification treatment, the sand is washed back. That is, the first three-way valve 41 and the second three-way valve 42 are switched in conjunction with each other, and the cooling water 6 is caused to flow from the second three-way valve 42 through the backwash pipe 46 to the lower portion of the sand-filled layer 39, and Packed layer 39
Is passed upward from below to separate the suspended matter, and is discharged together with the suspended matter from the first three-way valve 41 through the drain pipe 47 to wash the sand-filled layer 39.

In the case of maintenance management such as cleaning of the first circulation path 28 and inspection / repair of members, the first valve 31 is closed to stop the operation of the first pump 34, and the cooling water 6 is discharged. What is necessary is just to let it flow through the second circulation path 29.

On the other hand, a part of the cooling water flowing through the circulation pipe 27 via the water collecting body 26 is supplied to the second pump 63 of the second circulation path 29 having the second valve 61 which is opened by opening and closing operation. By driving, it flows into the upper part of the second purification processing unit 65 in the main body case 67 via the second check valve 71 and the second on-off valve 72 that opens. Then, the flowing cooling water 6 is supplied to the potential processing device 68.
In addition to contacting the outer peripheral surface of the metal tube, the active layer 69 flows.

Due to the contact of the potential processing device 68 with the metal tube, the floating substance in the cooling water 6 is finely divided by a slight potential difference generated on the outer peripheral surface of the metal tube, and the permeability is improved. In addition to suppressing the generation of scale and rust in the cooling tower 1 and the return pipe 15, etc., the scale and rust that has already been generated are fragile and peeled off, and the floating rust is made finer and the permeability is reduced. improves.

When flowing through the activation layer 69, the activation layer
In the tourmaline and alkali feldspar minerals that generate weak electricity that constitute 69, the activity of the cooling water 6 increases, that is, the dissociation state of hydrogen ions and hydroxyl ions progresses, and the inorganic substances of suspended substances dissolve in the ionic state In this state, the fineness of the suspended substance progresses and the permeability is improved, and the generation of scale and rust is suppressed. The already generated scale and rust are weakened and peeled, and the permeability is improved.

Further, the fired material constituting the activation layer 69 generates hypochlorous acid having a strong bactericidal effect by chlorine ions contained in the cooling water 6 and has a strong bactericidal effect generated by the decomposition of hypochlorous acid. Oxygen ions are generated to prevent the propagation of microorganisms and to prevent the generation of irritating odor due to chlorine.

The cooling water 6 flowing through the first purification processing section 57 of the first circulation path 28 and the cooling water 6 flowing through the second purification processing section 65 of the second circulation path 29 are supplied to the cooling tower. 1 bottom 7
And circulates from the nozzle 80. When the cooling water 6 is ejected from the nozzle portion 82 of the nozzle 80, the cooling water 6 stored in the bottom portion 7 of the cooling tower 1 is drawn through the gap between the nozzle portion 82 and the ejector portion 84 by the ejector effect. By the synergistic effect of the stirring effect by the jetting and the stirring effect by the entrainment of the cooling water 6, the cooling water 6 at the bottom 7 is substantially uniformly stirred and mixed, and the entire amount of the cooling water 6 is surely circulated. 25 and then purified.

In the case of maintenance management such as cleaning of the second circulation path 29 and inspection and repair of members, the second valve 61 is closed to stop the operation of the second pump 63, and the cooling water 6 is discharged. What is necessary is just to make it circulate through the 1st circulation path 28. The flow rate of the cooling water 6 in the second circulation path 29 is as large as possible.
Is preferably brought into contact with the potential processing device 68 and the activation layer 69, so that the load on each part is not increased.

As described above, a part of the cooling water 6 flowing from the cooling tower 1 through the purification circulating means 25 is removed by the sand filter 35 to remove suspended substances and brought into contact with the silver catalyst 52 of the silver processing means 50. After sterilization and algicidal treatment, it is returned to the cooling tower 1 to remove suspended substances such as dust entering from the outside, and
Microorganisms that cause odor, clogging, and the formation of scale due to the attachment of inorganic substances to the cleaning means 25, the circulating means 25, and the returning means 14 are prevented. Further, the remaining portion of the cooling water 6 flowing through the purification circulating means 25 is brought into contact with a corrosion-resistant metal tube containing the minerals of the potential treatment device 68 to generate a potential difference and the tourmaline of the activation layer 69, and the potential difference by the potential treatment device 68. The cooling water 6 is activated by weak electricity generated by tourmaline to suppress the generation and growth of inorganic crystals such as calcium and silica in the cooling water 6, and the cooling tower 1, the purification circulation means 25, and the return means
Prevent scale and corrosion such as 14. This allows
The maintenance and management of the cooling tower 1, the circulating means 25 for purification, the returning means 14 and the like can be easily performed, the environment can be improved by preventing an odor, the cooling efficiency can be improved by preventing blockage, and the consumption of the cooling water 6 can be reduced. However, a separate chemical is not required, and the operating cost can be reduced. Further, the flow rate of the cooling water 6 flowing through the sand filtration device 35 may be smaller than the flow rate of the cooling water 6 flowing through the potential processing device 68 and the activation layer 69, and thus the first purification processing unit 57 is used.
Since the second purification section 65 and the second purification section 65 are arranged in parallel with each other, the cooling water 6 can be efficiently diverted without causing a large pressure loss due to the sand filtration device 35 to perform a high purification treatment.
The control of the advanced purification process corresponding to the quality of the cooling water 6 to be treated can be easily performed with a simple configuration. In the case of maintenance management, the first valve 31 and the second valve 61 are opened and closed appropriately to perform the maintenance management. If the cooling water is circulated through either the first circulation path 28 or the second circulation path 29, maintenance and management can be easily performed without interrupting the purification process.

Further, since the activating layer 69 of the second purification processing section 65 is used together with tourmaline and an alkali feldspar-based mineral which is easy to handle and easy to collect, the cooling water 6 is activated by the tourmaline. It progresses due to the ionizing action of the system minerals, which can increase the effect of preventing corrosion such as scale and rust, and also prevents suspensions due to suspended substances and rust to easily provide high-permeability good cooling water 6 with a simple configuration. Purification can be performed.

Further, since copper is contained in the silver catalyst 52 of the silver processing means 50, the sterilization and algicidal action by silver is increased, and the propagation of microorganisms can be prevented, thereby preventing an unpleasant smell, clogging, and a decrease in cooling efficiency. At the same time, the generation and growth of scales based on microorganisms can be prevented.

Further, since a SiO ₂ —B ₂ O ₃ —Na ₂ O-based glass containing silver oxide is used as the silver catalyst, the silver catalyst slowly elutes into the cooling water over a long period of time and the silver ions are cooled. It dissolves in water and can suppress the growth of microorganisms by silver with a simple configuration and can be stably obtained over a long period of time.

Further, since a granular or massive calcined material containing iron oxide and manganese oxide as main components is used in combination for the activation layer 69, hypochlorous acid and oxygen having a strong bactericidal effect are generated.
In addition to preventing the growth of microorganisms, it is possible to prevent irritating odor due to chlorine.

Further, since the circulating cooling water 6 is ejected by the nozzle 80 having an ejector action, the cooling water 6 stored in the bottom 7 of the cooling tower 1 is sufficiently stirred, and the entire amount of the cooling water 6 is efficiently purified. Can be processed.

In the above embodiment, the cooling tower 1
Is not limited to a layer in which a corrugated filler is wound, but may be any layer having a large surface area and capable of efficiently cooling the cooling water 6 by heat of vaporization, and is not limited to a cylindrical shape.

Further, the second purification processing section 65 is not limited to an integrated structure in which both the potential processing device 68 and the activation layer 69 are provided in the main body case 67, and the second purification processing section 65 is provided separately in separate case bodies. The body components may be connected in series, and the activating means may be located upstream of the potential processing means.

Further, the activating means may be a case where only tourmaline or alkali feldspar-based mineral is filled, or a combination with other minerals or the like. Further, tourmaline and ore are not limited to ore. Alternatively, a resin, other inorganic substance, or ceramics on which cyclosilicate is supported may be used. Similarly, alkali feldspar-based minerals are not limited to ores, but include resins such as resins, other inorganic substances, and ceramics containing Or (KAlSi ₃ O ₈ ) -Ab (Na
AlSi ₃ O ₈ ) can also be used.

The nozzle 80 need not be provided.

Further, a circulating means for purification is provided at the bottom 7 of the cooling tower 1.
Although both ends of the cleaning means 25 are connected, the downstream side is connected to the water sprinkling means 10, or both ends of the purification circulating means 25 are connected to a water tank for storing the cooling water 6 flowing out from the bottom 7 through a pipe. ,
The upstream side may be connected to the water storage tank, and the downstream side may be connected to the bottom 7 of the cooling tower 1 or the water sprinkling means 10.

Further, the filtration means is not limited to sand filtration, but may be any solid-liquid separation means such as membrane filtration. Since the amount of suspended substances mixed into the cooling water is extremely small as compared with other sewage, sand filtration having a simple structure, easy maintenance and low cost is preferable.

[0065]

According to the apparatus for purifying cooling water in a cooling tower according to the first aspect of the present invention, the filtering means and the filtering means are connected in series to the purifying circulating means for circulating the cooling water in the cooling tower. For the silver processing means having a catalyst, a potential processing means having a metal tube which generates a potential difference by containing a corrosion-resistant mineral in which cooling water is in contact with an outer surface and cooling water is in contact with an outer surface, and an activation means containing tourmaline are provided. Since they are provided in parallel, the filtering means, which can process at a relatively low flow rate, and the potential processing means and activation means, which can process at a relatively high flow rate, respectively, can be efficiently processed. Easy maintenance without having to do it. Furthermore, the removal of suspended substances by filtration and the growth of microorganisms due to silver catalyst can be prevented, and the generation and corrosion of scale are prevented by the activation of cooling water due to the potential difference of the potential treatment means and the ionization action by tourmaline of the activation means. At the same time, the permeability is improved by miniaturization of suspended substances and stabilization of dissolved inorganic substances, maintenance and maintenance can be easily performed, and environmental odor prevention and blockage prevention by preventing unpleasant odors, cooling efficiency can be improved, and cooling Water consumption can be reduced, and there is no need to separately add a drug, and operating costs can be reduced.

According to the cooling water purifying apparatus of the cooling tower according to the second aspect, in addition to the effect of the cooling water purifying apparatus of the cooling tower according to the first aspect, the activation means is easy to handle and can be collected. Because of the easy inclusion of alkali feldspar minerals, the activation of cooling water by tourmaline and the ionizing action of alkali feldspar minerals, especially the synergistic effect of ionization of inorganic substances in the cooling water, prevent scale formation and corrosion and float. Suspension due to fine particles and rust can be prevented, and purification processing can be performed with good cooling water having high transparency.

According to the third aspect of the present invention, the filtering means and the silver catalyst are connected in series to the purifying circulating means for circulating the cooling water in the cooling tower. Potential treatment means provided with a metal tube that generates a potential difference by containing a corrosion-resistant mineral in which cooling water contacts the outer surface, and an alkali feldspar that is easy to handle and collect, Since the activating means containing the system minerals are provided in parallel, the cooling water which can efficiently process the filtering means which can process at a relatively low flow rate and the potential processing means and the activating means which can perform the processing at a relatively high flow rate respectively And the maintenance can be easily performed without interrupting the purification process. Furthermore, the removal of suspended solids by filtration and the growth of microorganisms due to the silver catalyst can be prevented, and the generation and corrosion of scale are caused by the activation of cooling water due to the potential difference of the potential treatment means and the ionization action of alkali feldspar-based minerals in the activation means. Prevention and improvement of permeability by miniaturization of suspended solids and stabilization of dissolved inorganic substances can be obtained, maintenance and management can be facilitated, and environmental odor prevention and blockage prevention and cooling efficiency improvement by preventing offensive odor can be obtained. ,
The consumption of cooling water can be reduced, and there is no need to separately add a medicine, and the operating cost can be reduced.

According to the cooling water purification apparatus of the cooling tower according to the fourth aspect, in addition to the effect of the cooling water purification apparatus of the cooling tower according to any one of the first to third aspects, the silver processing means can be used. The inclusion of copper enhances the bactericidal and algicidal action of silver, providing high levels of bactericidal and algicidal properties even with trace amounts of silver and copper, preventing the growth of microorganisms and producing scales based on microorganisms. Offensive odors can be efficiently prevented.

According to the cooling water purifying apparatus of the cooling tower according to the fifth aspect, in addition to the effect of the cooling water purifying apparatus of the cooling tower according to any one of the first to fourth aspects, in addition to the effect of the silver processing means. Si containing silver oxide as a silver catalyst
Since the O ₂ -B ₂ O ₃ -Na ₂ O-based glass is used, the silver catalyst slowly elutes into the cooling water over a long period of time and traces of silver ions dissolved in the cooling water efficiently prevent the propagation of microorganisms. ,
It is possible to prevent the generation of scales and off-flavors based on microorganisms.

According to the apparatus for purifying cooling water in a cooling tower according to claim 6, in addition to the effect of the apparatus for purifying cooling water in a cooling tower according to any one of claims 1 to 5, the activating means In order to provide a calcined product containing iron oxide and manganese oxide as main components, chlorine in the cooling water reacts with water to cause a strong bleaching and disinfecting action of hypochlorous acid (HCl).
O) and oxygen ions are generated, and the growth of microorganisms is prevented, the generation of scales based on the microorganisms and the off-odor are efficiently prevented, and the cooling water can be highly purified.

According to the cooling water purifying apparatus of the cooling tower according to the seventh aspect, in addition to the effect of the cooling water purifying apparatus of the cooling tower according to any one of the first to sixth aspects, in addition to the effect of the cooling water purifying apparatus in the cooling tower. At the downstream end of the purifying circulation means, the cooling water in the cooling tower is supplied with the nozzle part for jetting the cooling water flowing through the purifying circulation means and the cooling water jetted from the nozzle part, and is jetted again. Since the jet agitating means provided with the ejector unit to be provided is provided, the cooling water in the cooling tower is sufficiently agitated, so that the entire amount of the cooling water can be efficiently purified.

According to the cooling water purifying apparatus of the cooling tower according to the eighth aspect, in addition to the effect of the cooling water purifying apparatus of the cooling tower according to the seventh aspect, the cooling water purification apparatus of the cooling tower is directed outward at the tip of the nozzle portion. To connect the base end of the ejector part larger in diameter than the nozzle part to the distal end part of the connecting part protruded coaxially and coaxially in a state where they are substantially opposed to each other via a gap through which cooling water can flow into the distal end edge of the nozzle part With a simple structure, the efficiency of stirring the cooling water in the cooling tower is improved, and the entire amount of the cooling water can be efficiently purified.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration for purifying cooling water of a cooling tower according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling tower 6 Cooling water 25 Purification circulation means 35 Sand filtration device as filtration means 50 Silver treatment means 52 Silver catalyst 68 Potential treatment device as potential treatment means 69 Activated layer as activation means 80 Ejection stirring means Nozzle 82 Nozzle part 83 Connecting part 84 Ejector part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 9/00 504 C02F 9/00 504E 1/00 1/00 L 1/48 ZAB 1/48 ZABB 1 / 50 510 1/50 510A 520 520K 531 531E 531F 531T 540 540F 560 560Z 5/00 610 5/00 610B 610Z 620 620B 620C F28C 1/16 F28C 1/16 F28F 19/01 F28F13 / 00 19/00 501C 501D

Claims (8)

[Claims] An apparatus for purifying cooling water in a cooling tower that purifies the cooling water of a cooling tower that circulates cooling water and cools by heat of vaporization, comprising: a purifying circulation unit that circulates the cooling water; A filtering means provided in the purification circulating means for removing floating substances mixed into the cooling water; and at least a part of the cooling water connected in series to the filtering means and from which the floating substances have been removed contains silver. A silver processing means to be brought into contact with a silver catalyst, and a potential provided with a metal pipe connected in parallel with the filtering means to the purification circulating means, wherein the cooling water comes into contact with an outer surface and contains corrosion-resistant minerals to generate a potential difference. An apparatus for purifying cooling water in a cooling tower, comprising: a treatment unit; and an activation unit connected in series with the potential treatment unit and containing tourmaline that contacts the cooling water. 2. The apparatus for purifying cooling water in a cooling tower according to claim 1, wherein the activating means contains an alkali feldspar-based mineral. 3. A cooling water purifying apparatus for a cooling tower for purifying the cooling water of a cooling tower for circulating the cooling water for cooling by heat of vaporization, wherein: a purifying circulating means for circulating the cooling water; A filtering means provided in the purification circulating means for removing floating substances mixed into the cooling water; and at least a part of the cooling water connected in series to the filtering means and from which the floating substances have been removed contains silver. A silver processing means to be brought into contact with a silver catalyst, and a potential provided with a metal pipe connected in parallel with the filtering means to the purification circulating means, wherein the cooling water comes into contact with an outer surface and contains corrosion-resistant minerals to generate a potential difference. An apparatus for purifying cooling water in a cooling tower, comprising: processing means; and activating means containing an alkali feldspar-based mineral which is connected in series to the potential processing means and in contact with the cooling water. 4. The apparatus for purifying cooling water in a cooling tower according to claim 1, wherein the silver processing means contains copper. 5. The silver catalyst of the silver processing means is SiO ₂ —B ₂ O.
₃ -Na purification treatment apparatus of the cooling water in the cooling tower according ₂ to O system glass silver oxide claims 1 to characterized in that it is contained in 4 any one. 6. The cooling tower according to claim 1, wherein the activating means includes a granular fired material containing iron oxide and manganese oxide as main components. Processing equipment. 7. A cooling tower connected to a downstream end of the purifying circulating means, for jetting cooling water flowing through the purifying circulating means, and a cooling tower for jetting the cooling water from the nozzle part. 7. An ejection stirring means comprising an ejector section for supplying cooling water in a cooling tower and ejecting the cooling water into the cooling tower together with the ejected cooling water. For purifying cooling water in a cooling tower. 8. The nozzle portion is formed in a substantially cylindrical shape whose base end is connected to the circulating means for purification, and the ejector portion is formed in a substantially cylindrical shape having a diameter larger than that of the nozzle portion. A proximal end of the connecting portion protruding outward is substantially opposed to a distal end of the nozzle portion through a gap through which cooling water can flow into the distal end edge of the nozzle portion and is substantially coaxial with the nozzle portion. The purification device for cooling water in the cooling tower according to claim 7, wherein