KR100788849B1 - Water treatment apparatus by ozone - Google Patents

Abstract

An ozone contact type apparatus for water treatment is provided to prevent the generation of damages or excessive ozone by preventing ozone facilities from being rapidly stopped, accelerate an oxidation reaction using ozone dissolved water, separate and remove the non-reacted dissolved ozone from raw water by degassing non-reacted dissolved ozone, and enable a full stream and a side stream to be applied at the same time by adjusting the amount of supply water only. In an ordinary ozone contact type apparatus for water treatment comprising: a raw water inflow tank(10) into which raw water flows; a pump(14) for sucking raw water that has flown into the raw water inflow tank; an ejector(15) for mixing ozone with the raw water that has been sucked by the pump; an ozone dissolution reactor(40) into which ozone dissolved water that has been mixed by the ejector flows; and a first water blocking wall(11) for separating the raw water inflow tank and the ozone dissolution reactor, an ozone contact type apparatus(1) for water treatment further comprises a backflow device(21) which is formed on one side of the first water blocking wall, wherein the backflow device consists of a through groove penetrated into one face of the first water blocking wall and a backflow plate connected to one side of the through groove to move ozone dissolved water of the ozone dissolution reactor into the raw water inflow tank only when a water level of the raw water inflow tank is lower than that of the ozone dissolution reactor. An upper part of the first water blocking wall is opened such that one part of the raw water flown in the raw water inflow tank flow to the ozone dissolution reactor.

Description

Ozone Contact Water Treatment System {WATER TREATMENT APPARATUS BY OZONE}

1 is a schematic diagram of a conventional full stream water treatment apparatus.

2 is a schematic view of a conventional side stream water treatment apparatus.

Figure 3 is a cross-sectional view of the ozone contact water treatment apparatus according to an embodiment of the present invention.

Figure 4 is an exploded view of the ozone contact water treatment apparatus according to FIG.

5 is an internal state diagram of the ejector according to the present invention.

6 is a detailed view of the backflow device according to FIG. 3.

Figure 7 is an operating state of the backflow device according to the present invention.

8 is a cross-sectional view of the ozone contact water treatment apparatus according to another embodiment of the present invention.

9 is an exploded view of the ozone contact water treatment apparatus according to FIG. 8.

<Description of the symbols for the main parts of the drawings>

1: water treatment device 10: raw water inlet tank

11: first water film 15: ejector

17: critical tube 21: backflow device

24: counter flow plate 40: ozone dissolution reactor

41: second water film 50: ultrasonic treatment tank

51: blocking plate 52: ultrasonic processing unit

53: drain 54: ultrasonic oscillator

55: drain pipe

In the present invention, when the supply of raw water is stopped and the water level of the raw water inlet tank is low, the ozone-treated water in the ozone dissolution reaction tank is flowed back to the raw water inlet tank to prevent sudden operation stoppage of the ozone facility, and thus damage and non-infusion The present invention relates to an ozone contact type water treatment device capable of preventing excessive ozone generation.

In addition, the present invention by irradiating the ozone dissolved water treated by contacting ozone to the raw water ultrasonic wave to convert the dissolved ozone contained in the ozone contact water into highly reactive OH * (radical) to promote the oxidation reaction, OH * ( The present invention relates to an ozone-contact water treatment apparatus that can separate unreacted dissolved ozone which is not converted into radicals) from raw water and degass it to the atmosphere.

Ozone not only has much stronger oxidizing power than chlorine, but also has a fast oxidation rate and does not leave residue after deodorization and sterilization. On the other hand, it is very important that the ozone generated by the ozone generator be brought into efficient contact with the treated water. If the efficiency of contact with the water to be treated is lower, the efficiency of the whole process is reduced. At this time, the ozone that is not absorbed by the water is discharged into the atmosphere, which is not treated and causes various environmental problems. By carefully reviewing the purpose of treatment and energy consumption, an optimal contact method is required and analytical research is required.

As shown in FIG. 1, pressurized water is supplied using a pump to dissolve ozone, in which a full stream method of injecting ozone into the total amount or a quantity of a portion of the whole as shown in FIG. 2. The side stream method of injecting ozone into the mixture and mixing the dissolved ozone water with the total amount of water was used.

However, the full stream method has the disadvantage that the power consumption of the pump used to move the total quantity is very large, and the side stream method has the advantage that the capacity of the pump may be small, but a separate reactor and additional piping equipment, etc. This is a necessary problem. In addition, the existing full stream and side stream methods do not degas the dissolved ozone, which causes ozone odor and corrosion of the apparatus in subsequent processes, and causes a problem in that it is difficult to cope with fluctuations in the inflow amount.

In order to solve this problem, the present applicant has proposed a water and sewage ozone sterilization apparatus and method for forming a cavitation phenomenon when mixing ozone to the raw water passing through the water and sewage pipe in the Republic of Korea Patent No. 0445301.

However, in the ozone sterilization apparatus of No. 0445301, if the raw water amount of the inflow portion of the raw water is reduced and the raw water is not inhaled, the suction force of the ejector is lost and the water flows back toward the ozone generator, causing serious damage to the apparatus. As it decreased, the ozone gas suction power in the ejector was lowered, and thus unreacted excess ozone was generated, and problems such as odor generation remained.

In addition, ozone dissolved in ozone dissolved water is removed by natural bubbles, but dissolved ozone is discharged without being completely removed, resulting in ozone odor in the discharged water and corrosion of the device by ozone. .

In order to solve the problems of the prior art as described above, the object of the present invention is to stop the rapid operation of the ozone facility by refluxing the ozonated water of the ozone dissolution reaction tank back to the raw water inflow tank only when the supply of raw water is stopped and the water level of the raw water inlet tank is low. The present invention provides an ozone-contact water treatment device that can prevent the phenomenon and prevent damage caused during sudden stop of operation and the occurrence of uninjected excess ozone.

Another object of the present invention is to irradiate ozone dissolved water treated with ozone by contacting raw water with ultrasonic waves to convert dissolved ozone contained in ozone dissolved water into highly reactive OH * (radicals) to promote oxidation reactions, and unreacted. The present invention provides an ozone-contact water treatment apparatus for removing unreacted dissolved ozone that can be removed by removing the dissolved ozone from raw water.

Still another object of the present invention is to provide an ozone contact water treatment device capable of simultaneously applying a full stream and a side stream only by adjusting the supply amount.

The present invention for achieving the above object and the raw water inlet tank into which the raw water is introduced; A pump for sucking raw water introduced into the raw water inflow tank, an ejector for mixing raw water and ozone sucked by the pump, and the ozone dissolution reaction tank into which the ozone dissolved water mixed in the ejector flows; In the conventional ozone contact water treatment apparatus consisting of; a first water film separating the raw water inlet tank and the ozone dissolution reaction tank,

On one side of the first water barrier is provided on one side of the through groove and the through groove penetrating one surface of the first water barrier to move the ozone dissolved water of the ozone dissolution tank back to the raw water inflow tank only when the water level of the raw water inlet tank is lower than the ozone dissolution tank. It is characterized in that the backflow device consisting of a backflow plate hinged.

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Preferably, the first water block is about 6 to 10% of the water in contact with the side stream ozone by the supply pump ozone dissolved water and the remaining (90 to 94%) water flows into the ozone melting reactor to facilitate the side stream method It is characterized in that the top is opened so that it can be applied.

In addition, the present invention and the raw water inlet tank into which the raw water flows; A pump for sucking raw water introduced into the raw water inflow tank, an ejector for mixing raw water and ozone sucked by the pump, and the ozone dissolution reaction tank into which the ozone dissolved water mixed in the ejector flows; In the conventional ozone contact water treatment apparatus consisting of;
An ultrasonic treatment tank equipped with an ultrasonic oscillator at one side and receiving ozone dissolved water introduced into the ozone dissolution reaction tank; An ultrasonic oscillator mounted on one side of the ultrasonic treatment tank to separate the dissolved ozone contained in the ozone dissolved water into raw water and ozone by vibration of ultrasonic waves; And a second water film separating the ozone dissolution reaction tank and the ultrasonic treatment tank.

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Preferably, the ultrasonic treatment tank is formed in the blocking plate extending from the top to be spaced apart a predetermined distance is characterized in that separated into the ultrasonic treatment unit and the drain.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a cross-sectional view of the ozone contact water treatment apparatus according to an embodiment of the present invention, Figure 4 is an exploded view of the ozone contact water treatment apparatus according to Figure 3, Figure 5 is an internal state diagram of the ejector according to the invention, Figure 6 is a detailed view of the backflow apparatus according to FIG. 3, FIG. 7 is an operation state diagram of the backflow apparatus according to the present invention, FIG. 8 is a cross-sectional view of an ozone contact water treatment apparatus according to another embodiment of the present invention, and FIG. 8 is an exploded view of the ozone contact water treatment device according to FIG. 8. At this time, in describing the present invention, a detailed description of related known functions or configurations will be omitted in order not to obscure the subject matter of the present invention.

As shown in Figure 3 and 4, the ozone contact water treatment apparatus according to an embodiment of the present invention is formed on the one side of the body 1, the first water film 11 extending from the bottom to the upper direction is the raw water It is separated into an incoming raw water inlet tank 10 and an ozone lysis reaction tank 40 through which ozone dissolved water is discharged. At this time, the first water barrier 11 has an upper opening so that the raw water introduced into the raw water inflow tank 10 flows to the ozone melting reactor 40 while remaining water other than the quantity discharged into the supply pump is applied when the side stream application method is applied. It is preferable that it is done.

When raw water flows into the raw water inlet tank 10 blocked by the primary water barrier 11 through the inlet pipe 12, the pump 14 is operated to the inlet 13 installed at one side of the raw water inlet tank 10. The raw water is sucked into the ejector 15. At this time, by installing a hydraulic pressure gauge (P) on one side of the inlet pipe, a sensor (not shown) for stopping the operation of the system when it is out of the setting range of the hydraulic gauge may be installed.

Ozone mixed with the raw water flows into the ejector 15 through the vacuum tube 16. In this case, in the case of a full stream method in which the upper part of the first water barrier 11 is completely blocked, ozone introduced through the vacuum tube is preferably mixed at 3 mg / L with respect to 1000 m 3 / hr of raw water. In the case of the side stream method in which part of the raw water flows through the ozone lysis reaction tank 40 through the upper part of the first water barrier 11, 100 m3 / hr (10%) of the total amount of 1000 m3 / hr It is preferable to inject ozone at 30 mg / L through the ejector while supplying it to the supply pump, which is mixed with 900 m 3 / hr of water flowing through the upper portion of the first water film 11 to be ozone treated.

As shown in FIG. 5, the ejector 15 includes a reduction tube 31 in which the upper portion of the upper portion into which the raw water flows is gradually reduced, and an enlarged tube 33 in which the lower portion of the lower portion connected to the critical tube described later is gradually enlarged. And a suction pipe 32 through which ozone flows between the reduction pipe 31 and the expansion pipe 33. Accordingly, the raw water flowing into the ejector through the pipe line becomes very fast when passing through the reduced neck portion of the reduction pipe 31, and strongly sucks and mixes the ozone flowing into the suction pipe 32, causing a "cavitation" phenomenon. Ozone dissolves instantly in the raw water. Subsequently, the ozone dissolved water passing through the enlarged tube 33 passes through the neck portion which is gradually enlarged, and the strong flow rate changes to pressure, and the mixed ozone is dissolved under pressure, and the dissolved ozone is contained in the raw water. Reacts with materials to sterilize and oxidize organics.

Through such a process, ozone dissolved in ozone is sucked and mixed in the ejector 15, and is discharged through the critical tube 17 to the ozone dissolution reaction tank 40, and when the ozone dissolved water is discharged from the critical tube 17. The excess ozone that is not dissolved in is decomposed into the ozone decomposing device 60 through the ozone outlet 19 formed at the top of the ozone dissolution reaction tank 40. At this time, it is preferable that the support plate 18 is installed in the lower portion of the critical tube 17 for turbulence generation and bubble dispersion due to the collision of the gas-liquid mixture fluid.

On the other hand, as shown in FIG. 6, when the water level of the raw water inflow tank 10 is lower than the ozone dissolution tank 40 on one side of the first water barrier 11, the ozone dissolved water of the ozone dissolution tank 40 is again returned. A backflow device 21 for moving to the raw water inlet tank 10 is formed.

The backflow apparatus 21 includes a through groove 22 penetrating one surface of the first water barrier 11 and a backflow plate 24 coupled to the upper portion of the through groove 22 by a hinge 23. On the other hand, in order to increase the watertightness of the through groove 22 and the backflow plate 24 is formed in the contact plate 25, the backflow device 21 is preferably located above the suction port (13). At this time, when the material of the backflow plate 24 has a specific gravity higher than the raw water, it is coupled to the upper portion of the through groove, and when the specific gravity is lower than the raw water, the material is coupled to the lower portion of the through groove.

Accordingly, as shown in FIG. 7, when the level of the raw water flowing into the inlet pipe 12 is reduced or stopped, the counter flow plate 24 gradually decreases as the level of the raw water inlet tank 10 decreases. When the pressure of the raw water decreases, the counter flow plate 24 is gradually opened by the pressure of the ozone dissolved water in the ozone dissolved reaction tank 40, so that the ozone dissolved water flows back into the raw water inflow tank 10, and the level of the raw water inflow tank 10 is reduced. Is prevented from falling below a certain level. On the contrary, when the raw water flows into the inflow pipe 12 and the water level of the raw water inflow tank 10 gradually increases, the pressure of the raw water and the pressure of the ozone dissolved water on the backflow plate 24 become parallel, and the backflow plate 24 is loaded. While falling by the through groove 22 is in close contact with the ozone dissolved water of the ozone lysis tank 40 is no longer flowed back.

Therefore, when the raw water discharged into the ozone dissolution reaction tank 40 through the pump and the ejector through the suction port 13 of the raw water inlet tank 10 is exhausted, the injection of ozone is stopped and a malfunction occurs, and ozone is supplied without supply of raw water. It can be transported inside the ejector to avoid major problems that can cause the entire system to malfunction.

As shown in Figure 8 and 9, the ozone contact water treatment apparatus according to another embodiment of the present invention is the first water film 11 and the second water film (1) extending from the bottom to the upper direction on one side of the body ( 41 are respectively formed and separated into a raw water inflow tank 10 through which raw water is introduced, an ozone lysis reaction tank 40 through which ozone dissolved water is discharged, and an ultrasonic treatment tank 50 provided with an ultrasonic oscillator 54. At this time, the upper portion of the first water barrier 11 and the second water barrier 41 is preferably opened so as to flow to the neighboring ozone dissolution reaction tank 40 and the ultrasonic treatment tank 50 when the inflow increases. .

As described above, when the raw water flows into the raw water inlet tank 10 blocked by the primary water barrier 11 through the inlet pipe 12, the pump 14 is operated to be installed on one side of the raw water inlet tank 10 The suction port 13 sucks the raw water into the ejector 15, and strongly inhales the ozone at the pressure of the raw water from the ejector 15 to generate a "cavitation" phenomenon to dissolve the ozone in the raw water. After passing through the ozone lysis reaction tank (40). In addition, ozone which is not dissolved in the ozone dissolved water discharged to the ozone dissolution reaction tank 40 is introduced into and decomposed into the ozone decomposition device 60 through the ozone outlet 19 formed at the upper portion of the ozone dissolution reaction tank 40.

On the other hand, the ozone dissolved water introduced into the ozone dissolution reaction tank 40 passes through the upper portion of the second water film 41 and flows into the ultrasonic treatment tank 50.

As shown in FIG. 7, the ultrasonic treatment tank 50 is divided into an ultrasonic treatment unit 52 and a drain 53 by a blocking plate 51 extending from the upper portion to the lower portion by a predetermined distance. The ozone dissolved water introduced into the ozone dissolved water ultrasonic treatment unit 52 of the ozone dissolved reaction tank 40 is moved from the ultrasonic treatment unit 52 to the drain 53 through the lower portion of the blocking plate 51.

The ozone dissolved water introduced into the ultrasonic treatment unit 52 decomposes a part of the dissolved ozone contained in the ozone dissolved water by ultrasonic waves generated by the ultrasonic oscillator 54 installed at one side of the ultrasonic processing unit 52, thereby making it highly reactive. Conversion to (radical) promotes oxidation reactions with organic substances in ozone dissolved water. In addition, residual dissolved ozone which is not converted to OH * (radical) by ultrasonic vibration is separated into raw water and ozone. At this time, the ozone separated from the raw water is introduced into the ozone decomposing device 60 through the ozone outlet 19 formed in the upper portion of the ultrasonic processing unit 52 and decomposed.

The treated water from which ozone is separated is moved to the drain portion 53 through the lower portion of the blocking plate 51, and is discharged to the outside along the drain pipe 55 formed at one side of the drain portion 53.

In addition, as described above, the water level of the raw water inlet tank 10 is one side of the first water barrier 11 separating the body 1 into the raw water inlet tank 10 and the ozone dissolution reaction tank 40. 40, a lower back flow apparatus 21 for moving the ozone dissolved water of the ozone dissolved reaction tank 40 back to the raw water inlet tank 10 is formed.

In addition, a static mixer (not shown) may be installed at the lower end of the ozone dissolution reaction tank 40 so that the ozone dissolved water may be mixed well.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, the ozone contact water treatment apparatus of the present invention irradiates ultrasonic waves to ozone dissolved water to convert dissolved ozone contained in ozone dissolved water into highly reactive OH * (radicals) to promote oxidation reactions, and Not dissolved ozone has the advantage that it can be degassed and separated and treated by ozone gas.

In addition, even if the supply of raw water is stopped, the ozone treated water is flowed back into the raw water inlet tank to prevent sudden operation stop of the ozone facility, thereby preventing damage and uninjected surplus ozone generated during sudden operation stop. .

In addition, when applied to water treatment, it is easy to apply a side stream and does not generate unreacted dissolved ozone problem that occurs in other side stream methods, and thus it is economical and safe to treat ozone.

Claims (8)

delete A raw water inflow tank into which raw water flows in, a pump for sucking raw water introduced into the raw water inflow tank, an ejector for mixing raw water and ozone sucked by the pump, and the ozone lysis reaction tank for introducing ozone dissolved water mixed in the ejector; In the conventional ozone contact water treatment apparatus consisting of, the first water film separating the raw water inlet tank and the ozone dissolution reaction tank, On one side of the first water barrier is provided on one side of the through groove and the through groove penetrating one surface of the first water barrier to move the ozone dissolved water of the ozone dissolution tank back to the raw water inflow tank only when the water level of the raw water inlet tank is lower than the ozone dissolution tank. An ozone contact water treatment device, characterized in that a backflow device is formed of a hinged backflow plate. The method according to claim 2, wherein a part of the raw water flows in an ozone dissolution tank and a side stream method and a full stream method in which both the raw water is treated with ozone dissolved water are used. The first water barrier is an ozone contact water treatment apparatus, characterized in that the upper portion is opened so that some of the raw water introduced into the raw water inflow tank flows into the ozone dissolution reaction tank. A raw water inflow tank into which raw water flows in, a pump for sucking raw water introduced into the raw water inflow tank, an ejector for mixing raw water and ozone sucked by the pump, and the ozone lysis reaction tank for introducing ozone dissolved water mixed in the ejector; In the conventional ozone contact water treatment apparatus comprising a first water film separating the raw water inlet tank and the ozone dissolution reaction tank, An ultrasonic treatment tank equipped with an ultrasonic oscillator at one side and receiving ozone dissolved water introduced into the ozone dissolution reaction tank; An ultrasonic oscillator mounted at one side of the ultrasonic treatment tank to separate the dissolved ozone contained in the ozone dissolved water into raw water and ozone by ultrasonic vibration; And a second water membrane separating the ozone dissolution reaction tank and the ultrasonic treatment tank. The ozone contact type water treatment apparatus according to claim 4, wherein the second water barrier is opened to flow to the ultrasonic treatment tank when the flow rate of the ozone dissolved water introduced into the ozone dissolution reaction tank increases. The ozone contact water treatment apparatus of claim 4, wherein the ultrasonic treatment tank is formed with a blocking plate extending from the upper portion to the lower portion so as to be separated by a predetermined distance. 5. The penetrating groove of claim 4, wherein the one side of the first water barrier penetrates one surface of the first water barrier to move the ozone dissolved water of the ozone dissolution tank back to the raw water inlet tank only when the level of the raw water inlet tank is lower than the ozone dissolution tank. And a backflow device formed of a backflow plate hinged to one side of the through groove. delete

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