Complete oxidation type ozone water treatment apparatus

Abstract

Disclosed is an ozone water treatment apparatus, wherein through the combined action of: a complete-oxidation-type ozone gas injector (140); a gas–liquid contact reactor installed downstream of the ozone gas injector (140); an oxidation catalyst injector (185) installed after the mid-section of the gas–liquid contact reactor for injecting an oxidation catalyst capable of promoting the oxidation reaction of ozone gas; and a concentration meter (235) that measures the residual concentration in the final treated water and enables feedback control of the concentration, the oxidation reaction of ozone gas can be promoted, thereby increasing ozone oxidation reaction efficiency to 99.99% or more and lowering the residual ozone concentration of the final treated water to 0.01 wt ppm or less.

Description

Complete oxidation ozone water treatment device

[0001] The present invention relates to a complete oxidation type ozone water treatment system. More specifically, the present invention relates to a complete oxidation type ozone water treatment device in which ozone gas used for water treatment is completely utilized in an oxidation reaction that sterilizes and decomposes contaminants, so that substantially no ozone remains in the treated water.

[0002] The water treatment method using ozone (O3) gas is to perform advanced water purification, water and sewage treatment, wastewater treatment, leachate treatment, etc. by utilizing the strong oxidation, decomposition, sterilization, decolorization, and deodorization power of ozone.

[0003] In a water treatment process using ozone gas, an ozone gas injector is installed inside the transport pipe through which raw water and / or treated water (hereinafter referred to simply as "raw water") is transported, and ozone gas is injected to obtain a water quality purification effect through oxidation reaction and ozone dissolution. At this time, due to the high laminar flow velocity of 1 to 2 m / sec or more inside the transport pipe where ozone gas bubbles are generated, bubble generation failure due to static pressure occurs on more than 50% of the surface area of ​​the ozone gas injector. In this way, the size of the ozone gas bubbles generated in a non-uniform state where the bubble generation surface area is biased among the surface area of ​​the ozone gas injector is much larger than the bubbles generated in a state of uniform bubble generation surface area, which causes a problem in that the contact surface area of ​​the ozone gas and the raw water is greatly reduced.

[0004] In addition, the high laminar flow velocity inside the transfer pipe causes the generated bubbles to coalesce as they straighten in the direction of flow, and this bubble coalescence phenomenon further reduces the gas-liquid contact surface area and distribution uniformity. As a result, if the oxidation reaction efficiency is reduced, a large-volume ozone contact retention tank is required due to the characteristics of the ozone water treatment device, in which the reaction proceeds in the order of mixing, contact, oxidation, dissolution, and volatilization of gaseous ozone and raw water, which increases the cost of civil engineering and may raise environmental safety issues due to volatilized ozone, a malodorous substance. In particular, although ozone is an oxidizing substance that remains in water and the atmosphere in the form of oxygen after the oxidation reaction, it is classified as a toxic substance under the Occupational Safety and Health Act, and if ozone is dissolved in water in excessive amounts or leaked into the atmosphere and volatilized, it not only poses a serious threat to living things such as plants and animals, but also aggravates the corrosion of facilities such as machinery and electrical equipment, placing a burden on device maintenance.

[0005] These problems can be said to be the limitations of the physical mixing operation of the two substances, ozone gas and water, and in order to realize a perfect and safe ozone treatment system, a complete oxidation type ozone water treatment device that can achieve an oxidation reaction efficiency of 99.99% or higher is required.

[0006] To solve these problems, if a mixing and distribution device is installed at the rear end of the ozone gas injector to increase the contact area and distribution uniformity, the device load increases and the head loss within the conveying pipe increases.

[0007] Accordingly, an object of the present invention is to provide a complete oxidation type ozone water treatment device that can perform advanced purification of substances that are difficult to treat with a general water purification process by dispersing ozone gas evenly throughout the entire raw water to promote the oxidation reaction of ozone while using a minimum amount of energy and dissolving harmful toxic ozone within a controllable range or completely oxidizing it in the raw water.

[0008] Another purpose of the present application is to provide an ozone water treatment device capable of maximizing the contact reaction between raw water and ozone gas to maximize ozone utilization efficiency and perform complete water treatment.

[0009] Those skilled in the art will understand the above objects and various advantages of the present invention more clearly from the embodiments of the various aspects of the present invention described below.

[0010] In order to achieve at least one object of the present invention, one embodiment of the present invention comprises a transport pipe through which raw water to be treated is transported and supplied;

[0011] An ozone gas injector that injects and disperses ozone gas in the form of microbubbles into the raw water supplied and transported from the transport pipe in order to purify the raw water using the oxidation power of ozone;

[0012] A gas-liquid contact reactor installed downstream of the ozone gas injector, which promotes contact reaction treatment between the raw water and the ozone gas in the ozone mixed water being transported through the transport pipe; and

[0013] A discharge pipe is provided to continuously transport and discharge the treated water that has passed through the above-mentioned gas-liquid contact reactor.

[0014] The above ozone gas injector provides a complete oxidation type ozone water treatment device including a microporous tube having a plurality of micropores formed on the surface for injecting ozone gas supplied from an ozone generator into raw water in the form of microbubbles, a microbubble protection structure installed upstream of the microporous tube to prevent or at least delay the microbubbles from coalescing or disappearing due to the raw water flow, and a microbubble diffusion promoting structure installed downstream of the microporous tube to promote diffusion of the microbubbles generated by the microporous tube.

[0015] Preferably, the complete oxidation type ozone water treatment device may further include a turbulent converter installed upstream of the ozone gas injector so that the supplied ozone gas can maximize its oxidation reaction capability. This turbulent converter can convert the flow state of the raw water supplied and transported from the transport pipe from laminar flow to turbulent flow, thereby preventing or delaying the coalescence of microbubbles in the raw water and promoting the dispersion of the microbubbles.

[0016] That is, in order to achieve at least one object of the present invention, another embodiment of the present invention provides a complete oxidation type ozone water treatment device further comprising a turbulent flow converter installed upstream of the ozone gas injector, which converts the flow state of the raw water supplied and transported from the transport pipe from laminar flow to turbulent flow to promote dispersion of the microbubbles in the raw water.

[0017] In at least one embodiment of the present invention, the microporous tube is installed so as to be detachably inserted into the interior of the main pipe from the upper portion of the main pipe of the ozone gas injector, and includes a microporous portion having a plurality of micropores formed on a surface thereof, the microporous portion is formed on the lower side and the lower bottom portion of the microporous tube, and the lower bottom portion can be installed so as to be spaced apart from the lower portion of the main pipe.

[0018] In at least one embodiment of the present invention, the microbubble protection structure and the microbubble diffusion promoting structure are installed at a distance of 1 cm to 10 cm from the microporous tube, and when viewed from the direction of flow of the raw water or the direction opposite to the direction of flow of the raw water, the projected side cross-section of the microbubble protection structure or the microbubble diffusion promoting structure can at least completely cover the projected side cross-section of the microporous portion of the microporous tube.

[0019] In at least one embodiment of the present invention, the microbubble protection structure and the microbubble diffusion promotion structure are columnar structures having a V-shaped cross-section, the columnar structure is fixed to the upper and lower portions of the main pipe inside the main pipe, and an upper plate and a lower plate are installed on the upper and lower cross-sections of the columnar structure to assist in fixing the columnar structure to the upper and lower portions of the main pipe, respectively.

[0020] In at least one embodiment of the present invention, the microbubble protection structure and the microbubble diffusion promotion structure may have a V-shaped cross-section in which the angle between two straight lines forming the V-shape is 30° or more and 145° or less.

[0021] In at least one embodiment of the present invention, the microporous tubes are installed to form a plurality of rows of 1 to 5 rows, and in one row, 1 to 5 microporous tubes are installed, and in each of the rows, one row of the microbubble protection structure and one row of the microbubble diffusion promoting structure are installed, respectively, upstream and downstream of the microporous tubes of the row, and in each of the rows of the microbubble protection structure and the row of the microbubble diffusion promoting structure, the number of the microbubble protection structure and the microbubble diffusion promoting structure, which is the same as the number of the microporous tubes installed in each row of the microporous tubes, are installed to correspond to the microporous tubes.

[0022] In at least one embodiment of the present invention, only one row of the microbubble protection structure and the microbubble diffusion promotion structure is installed between the first row and the second row, or between the second row and the third row, or between the third row and the fourth row, or between the fourth row and the fifth row of the microporous tube, so that the roles of the two structures can be performed simultaneously.

[0023] In at least one embodiment of the present invention, an oxidation catalyst injector may be further included for injecting an oxidation catalyst into the treated water being transported after the stop of the gas-liquid contact reactor or downstream of the gas-liquid contact reactor.

[0024] In at least one embodiment of the present invention, a concentration meter may be further provided downstream of the oxidation catalyst injector to measure the concentration of dissolved ozone in the treated water downstream of the oxidation catalyst injector.

[0025] In at least one embodiment of the present invention, the turbulent converter may be at least one selected from a grid mixer, a fixed-wing mixer, and a rotary-wing mixer installed inside the conveying pipe.

[0026] In at least one embodiment of the present invention, it is preferable that the microporous tube has a cylindrical shape.

[0027] In at least one embodiment of the present invention, the gas-liquid contact reactor may include at least one selected from a plate-type mixing reactor, a multi-injection reactor, and a split shear reactor.

[0028] In at least one embodiment of the present invention, a transfer pump may be further included to facilitate transfer of the raw water supplied through the transfer pipe.

[0029] In at least one embodiment of the present invention, the raw water supplied through the conveying pipe can be additionally pressurized and conveyed by potential energy due to a drop.

[0030] In at least one embodiment of the present invention, a raw water tank for storing the raw water and supplying it to the transfer pipe may be further included.

[0031] In at least one embodiment of the present invention, the complete oxidation type ozone water treatment device may further include an ozone generator that generates and supplies ozone gas to be supplied to the microporous tube; and an ozone supply pipe that transports and supplies the ozone gas supplied from the ozone generator to the microporous tube.

[0032] In at least one embodiment of the present invention, the complete oxidation type ozone water treatment device may further include a discharge tank for storing the treated water discharged from the discharge pipe; and a spraying means installed at the end of the discharge pipe for spraying the treated water into the water within the discharge tank.

[0033] In at least one embodiment of the present invention, a main reactor may be further included that promotes a contact reaction between the raw water and the ozone gas in the ozone mixed water supplied from the gas-liquid contact reactor and supplies the treated water obtained thereby to the discharge pipe.

[0034] In at least one embodiment of the present invention, the gas-liquid contact reactor is installed in the order of the plate-type mixing reactor, the multi-injection reactor, the split shear reactor, and the multi-injection reactor.

[0035] In at least one embodiment of the present invention, the main reactor is a spray reverse mixing reactor that sprays and countercurrently mixes the ozone mixture to cause a contact reaction; and

[0036] The above-mentioned injection reverse mixing reactor may be built in, and a reaction tank may be provided for receiving and then discharging the treated water discharged from the above-mentioned injection reverse mixing reactor.

[0037] In at least one embodiment of the present invention, the reaction tank may further include a gas-liquid contact reactor that is built into the reaction tank and causes the ozone mixed water to contact react and then discharges it to the injection reverse mixing reactor.

[0038] In at least one embodiment of the present invention, the gas-liquid contact reactor may include at least one selected from a plate-type mixing reactor, a multi-injection reactor, and a split shear reactor.

[0039] In at least one embodiment of the present invention, the injection reverse mixing reactor may be provided with an injection pipe having an open front end through which the ozone mixed water flows and a reduced rear end through which the ozone mixed water flows, thereby forming an injection hole in the center; and a rear pipe having a concave reflector formed at the rear end so that the ozone mixed water injected from the injection pipe flows backward, and having an outlet for discharging the treated water on one side.

[0040] In at least one embodiment of the present invention, the plate-type mixing reactor may include an inlet reduction pipe having a diameter that is gradually reduced to change the flow path and velocity of the ozone mixed water passing through the microbubble diffusion promoting structure; a rear pipe for internally transporting the ozone mixed water supplied from the inlet reduction pipe; and a plurality of protruding members provided so as to protrude on the inner surface of the rear pipe to change the direction and velocity of the ozone mixed water and to divide and shear and bring it into contact.

[0041] In at least one embodiment of the present invention, the multi-injection reactor

[0042] A main pipe for internally transporting the ozone mixed water; and a blocking perforated plate provided in the main pipe in a direction perpendicular to the flow direction of the ozone mixed water and having a plurality of through holes through which the ozone mixed water passes.

[0043] In at least one embodiment of the present invention, the split shear reactor

[0044] A main pipe for internally transporting the ozone mixture; and a spiral blade in the shape of a curved plate that is repeatedly provided along the length direction within the main pipe may be provided.

[0045] In at least one embodiment of the present invention, a circulation pipe branching off from the discharge pipe in the middle and transferring a portion of the treated water to the raw water tank for reprocessing; and a mixing supply device mixing the treated water supplied through the circulation pipe and the raw water supplied from the raw water tank and supplying the mixture to the transfer pipe may be further provided.

[0046] In at least one embodiment of the present invention, the mixing feeder may include a mixing pipe for mixing the treated water and the raw water while transporting them internally; and a strainer provided within the mixing pipe for filtering out foreign substances.

[0047] In at least one embodiment of the present invention, an ozone generator that generates and supplies the ozone gas to be supplied to the ozone gas injector; and

[0048] It may further include an ozone supply pipe for transporting and supplying the ozone gas supplied from the ozone generator to the ozone generator.

[0049] In at least one embodiment of the present invention, the oxidation catalyst injected from the oxidation catalyst injector may be at least one advanced oxidation catalyst selected from hydrogen peroxide and sodium percarbonate that can promote oxidation reaction treatment of pollutants contained in the raw water by reacting with ozone to promote the generation of ㆍOH radicals and / or OH- anions.

[0050] The complete oxidation type ozone water treatment device according to the present invention can effectively prevent or delay the premature coalescence or extinction of the supplied ozone gas microbubbles and effectively diffuse the microbubbles to the downstream of the transport pipe. Therefore, the ozone water treatment device can evenly distribute the ozone gas throughout the raw water to be treated by micronizing the ozone gas, thereby making maximum use of the oxidation ability of the ozone gas. As a result, the oxidation reaction caused by the ozone gas is promoted, so that the ozone gas can fully exert its oxidation reaction ability in the raw water, and can perform advanced purification of substances that are difficult to treat with general water purification processes.

[0051] Therefore, since only a very small amount of residual ozone is dissolved in the treated water obtained by the ozone water treatment device according to the present invention, there is no need for an inlet well or a contact retention tank to receive the treated water and leave it for a certain period of time to naturally discharge the toxic and brittle residual ozone gas contained in the treated water before discharging the treated water.

[0052] Among the above ozone water treatment devices, the new type of detachable ozone gas injector can be installed so as to be detachably inserted into the inside of the main pipe from the upper part of the main pipe of the ozone gas injector, so that the microporous tube, which is a key component for injecting ozone gas, can be replaced from the upper part of the main pipe without draining the raw water or ozone mixed water. Therefore, the work time and cost for servicing the ozone gas injector are greatly reduced, corrosion of the gas supply pipe can be effectively prevented, and ozone gas leakage can be minimized during maintenance, thereby protecting the health of workers.

[0053] In conventional ozone water treatment equipment, the ozone gas injector is installed so that it is completely submerged in the horizontal raw water flow. Therefore, in order to maintain the ozone gas injector, the raw water to be treated and the treated water must be drained. As a result, the ozone gas component remaining in the main pipe and transfer pipe leaks out during drainage, posing a threat to the health of workers.

[0054] In this way, the ozone water treatment device according to the present invention can maximize the contact reaction to maximize the ozone utilization efficiency and perform perfect water treatment, and it does not require the installation of a mixing and differentiation device and can minimize the head loss, so the energy consumption is low and the maintenance work is easy.

[0055] Figure 1 is a configuration diagram of a complete oxidation type ozone water treatment device according to one embodiment of the present invention.

[0056] Figure 2a is a schematic perspective view of a detachable ozone gas injector (140) mounted on a complete oxidation type ozone water treatment device according to one embodiment of the present invention. Referring to this, the ozone gas injector (140) includes one microporous tube (141) for injecting ozone gas, one microbubble protection structure (143) installed on the upstream and downstream sides thereof, and one microbubble diffusion promoting structure (145).

[0057] Figure 2b is a cross-sectional side view of the ozone gas injector (140) of Figure 2a cut in the longitudinal direction.

[0058] Figure 2c is a schematic front view of the ozone gas injector (140) of Figure 2a viewed from the front (in the direction of the arrow).

[0059] Figure 2d is a schematic perspective view of a detachable ozone gas injector (140) mounted on a complete oxidation type ozone water treatment device according to another embodiment of the present invention. Referring to this, the detachable ozone gas injector (140) includes two rows of microporous tubes (141), two rows of microbubble protection structures (143), and two rows of microbubble diffusion promoting structures (145).

[0060] FIG. 2e is a planar conceptual diagram illustrating a mechanism in which a microbubble protection structure (143) and a microbubble diffusion promotion structure (145) are mounted on a detachable ozone gas injector (140) of a complete oxidation type ozone water treatment device according to another embodiment of the present invention, which protect and promote the microbubble generation environment and enable the generated microbubbles to be well dispersed downstream. It is a schematic conceptual diagram of the ozone gas injector (140) viewed from above.

[0061] FIG. 3 is a partial cross-sectional view of a plate-type mixing reactor of a complete oxidation type ozone water treatment device according to one embodiment of the present invention.

[0062] Figure 4 is a cross-sectional view of a multi-injection reactor of a complete oxidation type ozone water treatment device according to one embodiment of the present invention.

[0063] Figure 5 is a schematic cross-sectional view of a split-stage reactor of a complete oxidation type ozone water treatment device according to one embodiment of the present invention.

[0064] Figure 6 is a cross-sectional view of a spray reverse mixing reactor of a complete oxidation type ozone water treatment device according to one embodiment of the present invention.

[0065] Figure 7 is a configuration diagram of a complete oxidation type ozone water treatment device according to another embodiment of the present invention.

[0066] Figure 8 is a schematic cross-sectional view of a mixing feeder of a complete oxidation type ozone water treatment device according to another embodiment of the present invention.

[0067] Hereinafter, a complete oxidation ozone water treatment device according to an exemplary embodiment of the present invention will be described in more detail, with reference to the drawings if necessary. However, the following description is provided for illustrative purposes only and is not intended to limit the scope of the present invention. Therefore, it will be apparent to those skilled in the art that various modifications can be made.

[0068] Figure 1 is a schematic diagram of a complete oxidation type ozone water treatment device according to a preferred embodiment of the present invention.

[0069] According to the complete oxidation type ozone water treatment device of the present invention, the generation, dispersion and turbulence of microbubbles are promoted by the combined action of the optional turbulence device (125), the essential ozone gas injection microporous pipe (141), the microbubble protection structure (143) and the microbubble diffusion promoting structure (145) installed respectively upstream and downstream thereof. As a result, the ozone gas microbubbles injected into the raw water to be treated can be effectively prevented or delayed from coalescing or disappearing prematurely, and the microbubbles can be effectively diffused to the downstream of the transport pipe. The complete oxidation type ozone water treatment device of the present invention can maximize the ozone utilization efficiency and improve the water treatment effect by fully exerting the oxidation reaction ability possessed by the ozone gas by using this new type of detachable ozone gas injector (140) system. For this reason, it is possible to reduce the head loss load of an additional turbulent device, such as a mixing and differentiation device installed at the rear end of an ozone water treatment device, or it can have the advantage of not requiring such an additional rear turbulent device. Accordingly, since the head loss can be minimized, energy consumption is low, and the maintenance and replacement work of the ozone gas injector (140) is easy. By maximizing the efficiency of ozone gas utilization in this way, only a very small amount of residual ozone is dissolved in the treated water obtained by the ozone water treatment device according to the present invention, so there is no need for an inlet well or a contact retention tank to receive the treated water and leave it for a certain period of time to naturally discharge the toxic and brittle residual ozone gas contained in the treated water before discharging the treated water.

[0070] At the same time, by using low-energy gas-liquid contact reactors such as a plate-type mixing reactor (170), a multi-injection reactor (180), a split shear reactor (190), and a spray reverse mixing reactor (200) in combination, energy usage during the contact reaction is also reduced, thereby reducing energy usage by about 50 to 60% compared to the conventional injector and static mixer combination method.

[0071] Accordingly, since only the minimum energy is used, the transfer pump (130) that provides energy to the raw water can be omitted or used as a low-capacity one, and water treatment can be performed using only the potential energy of the raw water without necessarily using the transfer pump (130).

[0072] In addition, among the above ozone water treatment devices, the new type of detachable ozone gas injector (140) can be installed so that the microporous tube (141) can be detachably inserted into the main pipe (147) of the ozone gas injector from the upper part thereof, so that the microporous tube (141), which is a key component for injecting ozone gas, can be replaced from the upper part of the main pipe (147) without draining the raw water or ozone mixed water. Accordingly, the time and cost for servicing the ozone gas injector can be significantly reduced, corrosion of the gas supply pipe can be effectively prevented, and ozone gas leakage can be minimized during maintenance work, thereby protecting the health of workers.

[0073] In addition, after some contact reaction is performed in the detachable ozone gas injector (140), the contact reaction is promoted by using a low-energy, high-efficiency plate-type mixing reactor (170), a multi-injection reactor (180), a split shear reactor (190), and a spray reverse mixing reactor (200) in combination, so that the ozone utilization efficiency can be improved to over 99% and perfect purification treatment is possible, so that raw water containing difficult-to-decompose substances can be treated, and the amount of residual ozone can be reduced, and the amount of ozone used can be reduced by 35 to 45% compared to before, thereby reducing the cost of ozone generation.

[0074] An ozone water treatment device according to the present invention comprises: a selective raw water tank (110) for storing and supplying raw water to be treated; a conveying pipe (120) for conveying raw water supplied from the raw water tank (110); a detachable ozone gas injector (140) for injecting and dispersing ozone gas supplied through an ozone generator (not shown) and an ozone supply pipe (not shown) in the form of microbubbles into raw water supplied and conveyed from the conveying pipe to purify the raw water using the oxidizing power of ozone; a gas-liquid contact reactor installed downstream of the ozone gas injector (140) for promoting contact reaction treatment between the raw water in the ozone mixed water conveyed through the conveying pipe and the ozone gas; An oxidation catalyst injector (185) installed after the stop of the gas-liquid contact reactor or downstream of the gas-liquid contact reactor to inject at least one advanced oxidation treatment (AOP: Advanced Oxidation Process) oxidation catalyst selected from hydrogen peroxide and sodium percarbonate, which can promote oxidation reaction treatment of pollutants contained in the raw water by reacting with ozone to promote generation of ㆍOH radicals and / or OH- anions, into the transported reaction-treated treated water; And it has a discharge pipe (240) that continuously transports and discharges the treated water that has passed through the oxidation catalyst injector, and the detachable ozone gas injector (140) includes a microporous pipe (141) having a plurality of micropores formed on the surface for injecting ozone gas supplied from an ozone generator into raw water in the form of microbubbles, a microbubble protection structure (143) installed upstream of the microporous pipe to prevent or at least delay the microbubbles from coalescing or disappearing due to the raw water flow, and a microbubble diffusion promoting structure (145) installed downstream of the microporous pipe to promote the diffusion of the microbubbles generated by the microporous pipe.

[0075] The raw water tank (110) is used to temporarily store and supply the raw water to be treated, and is selected to have a capacity that can overcome fluctuations in the inflow of raw water and enable stable operation of the device. An outlet for discharging raw water is provided on one side of the raw water tank (110), and the outlet is connected to one end of a transfer pipe (120). However, in the ozone water treatment device of the present invention, the raw water tank (110) is an optional component and is not necessarily required. Although raw water can be directly taken from a water source and supplied directly through a transfer pipe (120), it is preferable to provide the raw water tank (110) for stable supply of raw water.

[0076] The transfer pipe (120) is a pipe that internally transfers and supplies raw water supplied from the raw water tank (110). One end is connected to the outlet of the raw water tank (110) and the other end is connected to the tip of a turbulent converter (125) to supply the raw water to the turbulent converter (125), which is an optional component. In the case of an embodiment that does not have the turbulent converter (125), the other end of the transfer pipe (120) is connected to the tip of a gas injector to directly supply the raw water to a removable ozone gas injector (140).

[0077] This transport pipe (120) is designed and equipped so that the energy loss of the raw water being transported can be minimized.

[0078] The transfer pump (130) is used to apply the energy required to treat the raw water so that the raw water is sucked in and pressurized at a certain pressure and flow rate, and a pump with excellent operating efficiency in terms of flow rate and head is selected. According to the present invention, since smooth water treatment is possible even if only a small amount of energy is applied to the raw water, the transfer pump (130) that applies energy to the raw water can be omitted or used as a pump with a small capacity, and the raw water can be supplied with only potential energy due to the drop without using the transfer pump (130). At this time, the application of the drop energy can be implemented by, for example, installing the transfer pipe (120) vertically.

[0079] The turbulent converter (125), which can be installed upstream of the removable ozone gas injector (140), changes the flow state of the raw water supplied and transported from the conveying pipe (120) from laminar flow to turbulent flow and further increases the flow velocity. Since the raw water is supplied to the ozone gas injector (140) in a turbulent form, the dispersion and diffusion of ozone gas microbubbles in the raw water are promoted, thereby significantly increasing the contact area with water. Accordingly, the oxidation reaction ability of the ozone gas can be almost completely utilized, thereby increasing the water treatment efficiency, and effectively preventing head loss, thereby minimizing energy consumption. The turbulent converter (125) may be at least one selected from a grid mixer, a fixed-wing mixer, and a rotary-wing mixer installed inside the conveying pipe (120).

[0080] The ozone gas injector (140) starts water treatment by injecting and dispersing ozone gas in the form of microbubbles into the raw water supplied from the transport pipe.

[0081] FIG. 2a is a schematic perspective view of an ozone gas injector (140) in an ozone water treatment device according to one embodiment of the present invention. FIG. 2b is a side cross-sectional view taken along the length of the ozone gas injector (140) of FIG. 2a. FIG. 2c is a schematic front view (in the direction of the arrow) of the ozone gas injector (140) of FIG. 2a.

[0082] Referring to FIGS. 2a to 2c, the ozone gas injector (140) includes one microporous tube (141) for injecting ozone gas, one microbubble protection structure (143) installed upstream and downstream thereof, and one microbubble diffusion promoting structure (145).

[0083] The main pipe (147) of the removable ozone gas injector (140) may have a circular or oval cross-section, and if circular, its diameter may be 50 cm to 200 cm depending on the raw water treatment amount.

[0084] The microporous tube (141) may be in the shape of a cylinder or an elliptical column. An ozone gas introduction connection (141b) is provided at the upper end of the microporous tube (141) to which an ozone supply pipe (not shown) can be connected. That is, the ozone supply pipe is connected to the ozone gas introduction connection (141b) to transport and supply ozone gas supplied from an ozone generator (not shown) to the microporous tube (141), and the ozone generator (not shown) is connected to the ozone supply pipe (not shown) and generates ozone gas to be supplied to the microporous tube (141) and supplies it to the ozone supply pipe (not shown).

[0085] Here, the ozone generator (140) generates and supplies ozone gas of an appropriate concentration and volume to be injected into the raw water being transported, and receives the raw gas from a separate raw gas tank to generate ozone. This ozone generator can generate ozone by passing the raw gas supplied at a predetermined pressure through an electric field when the raw gas is oxygen or dry air, thereby separating some of the oxygen molecules into oxygen atoms and then allowing the separated oxygen atoms to combine with other oxygen molecules. The raw gas tank supplies the raw gas necessary for ozone generation to the ozone generator, and the raw gas may be oxygen or dry air.

[0086] The microporous tube (141) can be installed so as to be detachably inserted into the interior of the main pipe (147) from the upper portion of the main pipe (147) of the detachable ozone gas injector (140), and includes a microporous portion (141a) having a plurality of micropores formed on the surface, and the microporous portion (141a) is formed on the lower side and the lower bottom portion of the microporous tube, and the lower bottom portion is installed so as to be spaced apart from the lower portion of the transport pipe. In terms of effectively forming microbubbles of ozone gas to minimize energy usage and maximize mixing and contact reaction, the diameter of the micropores may be 10.0 ㎛ or less, for example, 9.8 ㎛ or less, 9.6 ㎛ or less, 9.4 ㎛ or less, 9.2 ㎛ or less, 9.0 ㎛ or less, 8.8 ㎛ or less, 8.6 ㎛ or less, 8.4 ㎛ or less, 8.2 ㎛ or less, or 8.0 ㎛ or less.

[0087] By using a detachable ozone gas injector (140) equipped with such a microporous tube (141), the pressure loss of the injected ozone gas can be reduced to 200 mbar or less, and above all, the energy use of the raw water due to the injection of the ozone gas can be minimized, and the energy use of the raw water can be reduced to about 1 / 20 compared to the case of using a conventional injector.

[0088] Since ozone gas is injected in the form of microbubbles through numerous micropores (141a), the microbubbles of ozone gas can be quickly and uniformly mixed and dissolved in the raw water being transported internally, and as a result, the contact reaction between the raw water and ozone gas can be maximized.

[0089] The microbubble protection structure (143) and the microbubble diffusion promoting structure (145) are installed at a distance of 1.0 cm to 10.0 cm from the microporous tube (141). The microbubble protection structure (143) and the microbubble diffusion promoting structure (145) are intended to protect and promote the microbubble generation environment and ensure that the generated microbubbles are well dispersed and diffused downstream. This significantly enhances the microbubble generation effect.

[0090] That is, the microbubble protection structure (143) and the microbubble diffusion promotion structure (145) prevent the raw water flow from directly colliding with the microporous tube (141), specifically the microporous portion (141a), at a high flow rate, so that a constant differential pressure is maintained between the inside and outside of the micropores through the entire surface area of ​​the microporous portion (141a), thereby allowing ozone gas microbubbles to be generated, and delaying or preventing the generated microbubbles from coalescing and growing larger or disappearing. In this respect, the separation distance may be, for example, 1.5 cm to 9.0 cm, 2.0 cm to 8.5 cm, 3.0 cm to 8.0 cm, 3.5 cm to 7.5 cm, 4.0 cm to 7.0 cm, 4.0 cm to 7.0 cm, 1.0 cm to 5.0 cm, 1.0 cm to 4.0 cm, 1.0 cm to 3.0 cm, or 1.0 cm to 2.0 cm.

[0091] The microbubble protection structure (143) and the microbubble diffusion promotion structure (145) can also be expected to protect the microporous tube (141) from the impact of a raw water flow with a high flow rate and prevent the microporous tube (141) from being damaged by the vibration of the ozone gas injector.

[0092] When the microbubble protection structure (143) and the microbubble diffusion promotion structure (145) are viewed in a straight line with the microporous tube (141) in the direction of the flow of the raw water (arrow direction) or in the direction opposite to the direction of the flow of the raw water, it is preferable that the projected side cross-section of the microbubble protection structure (143) and the projected side cross-section of the microbubble diffusion promotion structure (145) each cover at least the entirety of the microporous tube (141), specifically, the projected side cross-section of the microporous portion (141a). That is, the areas of the projected side cross-section of the microbubble protection structure (143) and the projected side cross-section of the microbubble diffusion promotion structure (145) are each at least equal to the area of ​​the projected side cross-section of the microporous portion (141a). In order to protect and promote the microbubble generation environment and to ensure that the generated microbubbles are well dispersed downstream, it is preferable that the projected side cross-section area of ​​the microbubble protection structure (143) and the projected side cross-section area of ​​the microbubble diffusion promotion structure (145) be at least 110%, 120%, 130%, 140%, or 150% larger than the projected side cross-section area of ​​the microporous portion (141a), respectively. However, in order to prevent the raw water flow resistance from becoming excessively large, it is not preferable that the projected side cross-section area be at least 160% larger.

[0093] The microbubble protection structure (143) and the microbubble diffusion promotion structure (145) are columnar structures having a V-shaped cross-section, and the microbubble protection structure (143) and the microbubble diffusion promotion structure (145) can be fixed to the upper and lower parts of the main pipe (147) inside the main pipe (147) by means of welding, thermal fusion, etc. To this end, the upper and lower parts of the microbubble protection structure (143) and the microbubble diffusion promotion structure (145) are provided with an upper plate (143a) and a lower plate (143b) of the microbubble protection structure (143) to assist in fixing to the upper and lower parts of the main pipe (147), respectively, and an upper plate (145a) and a lower plate (145b) of the microbubble diffusion promotion structure (145).

[0094] From the viewpoint of protecting and promoting the microbubble generation environment and reducing the raw water flow resistance, the microbubble protection structure (143) and the microbubble diffusion promoting structure (145) are installed in a direction so that the sharp protrusions (Fig. 2c, hatched portions) of the V-shaped section of the V-shaped section can collide with the raw water flow first. From the above viewpoint, it is preferable that the angle between two straight lines forming the V shape in the V-shaped section be 30° to 145°, for example, 40° to 135°, 50° to 125°, or 60° to 115°. Simulation (ozone injection amount: 2 g / m) through a computational fluid dynamics (CFD) software program performed by the inventors of the present invention 3 , ozone gas concentration 12 wt%, gas-liquid ratio: 1.12, micropore diameter of microporous tube; 10 ㎛, conveying pipe flow rate: 1 m / sec, number of pipe reactors: 1 stage of ozone gas injector (140), 1 stage of plate-type mixing reactor (170), 1 stage of multi-injection reactor (180), and 1 stage of split shear reactor (190), it was confirmed that the angle was most effective when it was 80° or more and 120° or less.

[0095] FIG. 2D is a schematic perspective view of an ozone gas injector (140) mounted on a complete oxidation type ozone water treatment device according to another embodiment of the present invention. Referring to FIG. 2D, the ozone gas injector (140) includes two rows of microporous tubes (141), two rows of microbubble protection structures (143), and two rows of microbubble diffusion promoting structures (145). Three microporous tubes (141) are installed in each row of microporous tubes (141), and one row of microbubble protection structures (143) and one row of microbubble diffusion promoting structures (145) are installed on the upstream and downstream sides thereof, respectively. At this time, when viewed from the raw water flow direction (arrow direction), three microbubble protection structures (143) and three microbubble diffusion promoting structures (145) are installed in each row of microbubble protection structures (143) and microbubble diffusion promoting structures (145) so as to be in a straight line with the corresponding microporous tubes (141). The microbubble protection structures (143) and microbubble diffusion promoting structures (145) are configured in multiple arrays like this so that the microbubble protection structures (143) in the front row assist the microporous tubes (141) to effectively generate microbubbles and disperse them well, and the microbubble diffusion promoting structures (145) in the rear row allow the generated microbubbles to be serially dispersed and diffused, thereby promoting the overall mixing of the raw water and ozone gas microbubbles. This can reduce the head loss of the entire ozone water treatment device and improve the ozone reaction and transfer effect.

[0096] The number of rows of microporous tubes (141), microbubble protection structures (143), and microbubble diffusion promoting structures (145) installed in the ozone gas injector (140) of the ozone water treatment device according to the present invention and the number of each row installed are not limited to the embodiments illustrated in FIGS. 2a and 2d. For example, the microporous tubes (141) in the ozone gas injector (140) of the ozone water treatment device according to the present invention may be installed to form multiple rows of 1 to 5 rows, and 1 to 5 microporous tubes (141) may be installed in one row. At this time, one row of microbubble protection structures (143) and one row of microbubble diffusion promoting structures (145) may be installed upstream and downstream of one row of microporous tubes (141), respectively. In one row of microbubble protection structures (143) and one row of microbubble diffusion promoting structures (145), the number of microbubble protection structures (143) and microbubble diffusion promoting structures (145) may be installed corresponding to the number of microporous tubes (141) installed in one row of microporous tubes (141), respectively, so as to correspond to the microporous tubes (141). Here, 'correspondence' means that the microporous tubes (141) are positioned in a straight line with the microbubble protection structures (143) and the microbubble diffusion promoting structures (145) when viewed from the raw water flow direction (arrow direction) or the opposite direction.

[0097] FIG. 2e is a plan view schematically illustrating a mechanism for protecting and promoting the microbubble generation environment and enabling the generated microbubbles to be well dispersed downstream by the microbubble protection structure (143) and the microbubble diffusion promoting structure (145) mounted on an ozone gas injector (140) of a complete oxidation type ozone water treatment device according to another embodiment of the present invention. This drawing is a schematic conceptual diagram of the ozone gas injector (140) viewed from above.

[0098] In the ozone gas injector (140) mounted on the complete oxidation type ozone water treatment device according to the present invention, only one row of microbubble protection structures (143) and one row of microbubble diffusion promoting structures (145) is installed between the first and second rows, or between the second and third rows, or between the third and fourth rows, or between the fourth and fifth rows of microporous tubes (141), so that the roles of both structures can be performed simultaneously. For example, in the embodiment illustrated in FIG. 2e, only one row of microbubble protection structures (143) and microbubble diffusion promoting structures (145) installed between the first and second rows of microporous tubes (141) can be installed, so that the roles of both structures can be performed simultaneously.

[0099] Referring to FIG. 2e, a raw water flow (149) from a raw water tank (110) through a transfer pipe (120) is directed toward a row of microporous tubes (141) in the form of laminar flow or, preferably, turbulent flow. Since the raw water flow (149) first collides with a row of microbubble protection structures (143) before directly colliding with the microporous tubes (141), it does not directly collide with the microporous tubes (141). Accordingly, the raw water flow (149) does not exert strong pressure on the front surface of a plurality of micropores (141a) formed on the surface of the microporous tubes (141). Therefore, ozone gas microbubbles sprayed from the micropores (141a) of the microporous tubes (141) are prevented from, or at least delayed from, coalescing or disappearing with each other by the raw water flow (149). Ozone gas microbubbles flow downstream without being destroyed or coalesced into larger microbubbles, while maintaining their microbubble state. When these microbubbles reach a row of microbubble diffusion promoting structures (145) downstream, they collide with them and then flow left and right to diffuse, thereby allowing the ozone gas microbubbles to flow downstream without being destroyed or coalesced into larger microbubbles, while maintaining their microbubble state.

[0100] In this way, the complete oxidation type ozone water treatment device according to the present invention can effectively prevent or delay the premature coalescence or extinction of the supplied ozone gas microbubbles and effectively diffuse the microbubbles to the downstream of the transport pipe. Therefore, the ozone water treatment device can evenly distribute the ozone gas throughout the raw water to be treated by pulverizing it, so that the oxidation ability of the ozone gas can be utilized as effectively as possible. As a result, the oxidation reaction caused by the ozone gas is promoted, so that the ozone gas can fully exert its oxidation reaction ability in the raw water, and advanced water purification can be performed on substances that are difficult to treat with general water purification processes.

[0101] In the ozone gas injector (140) illustrated in FIGS. 2a to 2e, the main pipe (147) is open at both ends, and a flange portion (FIG. 2b, 144) for pipe connection is formed at both ends.

[0102] The gas-liquid contact reactor promotes the contact reaction between raw water and ozone gas while minimizing the energy consumption of the transported ozone mixture, and specifically uses a plate-type mixing reactor (170), a multi-injection reactor (180), and a split shear reactor (190).

[0103] The plate-type mixing reactor (170) changes the flow path of the ozone mixture, accelerates the flow rate, and divides and shears the ozone mixture to promote the contact reaction.

[0104] As illustrated in FIG. 3, the plate-type mixing reactor (170) is provided in the form of a tube with a gradually decreasing diameter, and is composed of an inlet reduction pipe (172) that changes the flow path of the ozone mixed water supplied and transported from the ozone gas injector (140) and accelerates the flow rate, a rear pipe (174) that continues to transport the ozone mixed water after the inlet reduction pipe (172), and a plurality of protruding members (176) that are provided so as to protrude on the inner surface of the rear pipe (174) to change the direction and flow rate of the ozone mixed water to cause a turbulent flow phenomenon and partially divide and shear the ozone mixed water. Flange portions (172a, 174a) for pipe connection are formed at the front end of the inlet reduction pipe (172) and the rear end of the rear pipe (174) that form both ends of the plate-type mixing reactor (170).

[0105] The inlet reduction pipe (172) is formed so that its diameter gradually decreases from the front end to the rear end, thereby accelerating the flow rate of the transported ozone mixed water and changing the flow path to promote the contact reaction between the raw water and ozone gas.

[0106] The protruding members (176) are provided so as to be evenly arranged in a plurality on the inner surface of the rear pipe (174), so that the conveyed ozone mixed water collides with the plurality of protruding members (176), thereby changing its direction and velocity and generating a turbulent flow phenomenon, and also causing a portion of the mixed water to be divided and sheared, thereby promoting the contact reaction between the raw water and the ozone gas again. Such protruding members (176) can be implemented in the form of a small, inclined plate as illustrated.

[0107] The multi-injection reactor (180) continuously transports the ozone mixed water that has been reacted in the plate-type mixing reactor (170) while accelerating, dividing, shearing, swirling, turbulent, and counter-flowing to promote the contact reaction again. As shown in Fig. 4, this multi-injection reactor (180) is composed of a main pipe (182) that transports the ozone mixed water supplied from the plate-type mixing reactor (170) internally, and a plate-shaped blocking porous plate (184) having a plurality of through holes (184a) that are repeatedly provided in a direction perpendicular to the flow direction of the ozone mixed water within the main pipe (182).

[0108] Both ends of the main pipe (182) are open, and flange portions (182a) for pipe connection are formed at both ends. A plurality of blocking perforated plates (184) are provided in a repeated manner so as to be spaced apart along the length of the main pipe (182). Accordingly, the transported ozone mixed water sequentially collides with the blocking perforated plates (184), thereby changing the flow or reverse flow or changing the flow velocity, and as it passes through the through holes (184a), the flow velocity is accelerated and partially divided, and the resulting strong shearing action and eddy, turbulent, and reverse flow actions can promote the contact reaction between the raw water and the ozone gas.

[0109] This multi-injection reactor (180) has a reaction efficiency that is about 10 times better than that of a conventional static mixer, etc., while its energy consumption is very low at about 83%, which can significantly reduce energy use. In summary, the distribution of ozone gas in the raw water becomes very uniform as it passes through the ozone gas injector (140) and the plate-type mixing reactor (170), and the contact reaction between the raw water and the ozone gas begins in earnest as it passes through the multi-injection reactor (180).

[0110] The split shear reactor (190) continuously transfers the ozone mixed water that has been reacted in the multi-injection reactor (180) while dividing, shearing, inverting, and turbulently promoting the contact reaction again. As shown in Fig. 5, this split shear reactor (190) is composed of a main pipe (192) that internally transfers the ozone mixed water supplied from the multi-injection reactor (180), and a curved plate-shaped spiral blade (194) that is arranged in a vertical direction and a horizontal direction in the longitudinal direction within the main pipe (192) so as to continuously divide and divide the ozone mixed water. Both ends of the main pipe (192) are open, and flange portions (192a) for connecting the pipes are formed at both ends.

[0111] Accordingly, the internally transported ozone mixed water is continuously divided into two as it passes through each spiral blade (194), and its direction and flow speed are varied according to the curved shape of the spiral blade (194), and as the direction of each spiral blade (194) is sequentially changed, it is reversed and converted, so that the contact reaction between the raw water and the ozone gas can be promoted by the strong shear and turbulent action. If the number of spiral blades (194) is n, the number of divisions of the ozone mixed water becomes 2ⁿ. Such a division shear reactor (190) causes somewhat large energy consumption but is good in terms of reaction efficiency.

[0112] The plate-type mixing reactor (170), multi-injection reactor (180), and split shear reactor (190) described above are all low-energy gas-liquid contact reactors that can significantly reduce the energy usage of ozone mixing water compared to conventional static mixers, etc., and the adoption, arrangement order, and number of reactors of the three types of reactors (170, 180, 190) can be optional.

[0113] The main reactor (230) promotes the contact reaction between the raw water and ozone gas that has not yet reacted while passing through the plate-type mixing reactor (170), the multi-injection reactor (180), and the split-stage reactor (190), thereby almost completing the reaction. This main reactor (230) essentially includes a spray reverse mixing reactor (200), and optionally includes the low-energy-use gas-liquid contact reactor mentioned above in front of the spray reverse mixing reactor (200). The drawing shows a case where a split-stage reactor (190) is adopted as the built-in low-energy-use gas-liquid contact reactor.

[0114] The main reactor (230) has a relatively large diameter and is composed of a reaction tank (210) that internally receives and then discharges the treated water discharged from the injection reverse mixing reactor (200), a split shear reactor (190) and an injection reverse mixing reactor (200) built into the reaction tank (210), and a gas-liquid separation means (220) that separates and discharges exhaust gases such as oxygen gas remaining in the ozone mixed water received in the reaction tank (210). The injection reverse mixing reactor (200) promotes the contact reaction again through injection and countercurrent mixing.

[0115] As shown in Fig. 6, this injection reverse mixing reactor (200) is composed of an injection pipe (222) having an open front end through which ozone mixed water flows in and a gradually reduced rear end cross-section to form an injection hole (222b) in the center, and a rear pipe (224) having a concave reflector (224a) provided on the rear end for reversely flowing the ozone mixed water sprayed from the injection pipe (222) and an outlet (224b) for discharging the treated water subjected to reaction treatment on one side wall. The front end of the injection pipe (222) is open, and a flange portion (222a) for connecting the pipe is formed on the front end.

[0116] Accordingly, when the ozone mixed water supplied from the split shear reactor (190) passes through the inside of the injection pipe (222) and is sprayed from the injection hole (222b), the direction and flow rate of the ozone mixed water are changed, causing a turbulent flow, and when the sprayed ozone mixed water passes through the inside of the rear pipe (224) and hits the concave reflector (224a), turbulent flow, eddy current, and countercurrent flow are caused, promoting the contact reaction, and then the treated water, whose contact reaction is almost complete, is discharged through the outlet (224b) formed on one side wall of the rear pipe (224) and received into the reaction tank (210). Such a spray reverse mixing reactor (200) is also a low-energy gas-liquid contact reactor that can reduce the energy loss of the ozone mixed water compared to a conventional static mixer, etc.

[0117] The gas-liquid separation means (220) separates and discharges exhaust gases, such as oxygen gas, generated by the gas-liquid contact reaction and remaining in the treated water from the treated water in the reaction tank (210), thereby maintaining the pressure within the reaction tank (210). The gas-liquid separation means (220) may be implemented as a check valve that can selectively discharge exhaust gases that collect in the upper space within the reaction tank (210).

[0118] The discharge pipe (240) continuously transports and discharges the treated water discharged from the reaction tank (210) of the main reactor (230), and is extended from the reaction tank (210). This discharge pipe (240) is designed and provided so that the energy loss of the transported treated water can be minimized.

[0119] Furthermore, according to the present invention, the treated water can be transported to a target location and discharged through a discharge pipe (240), but preferably, a discharge tank (270) may be further provided to finally collect and store the treated water discharged through the discharge pipe (240). The discharge tank (270) is used to finally collect the treated water and safely discharge it, and is selected with a capacity that can overcome fluctuations in the inflow and outflow of the treated water and enable stable operation of the system. In order to minimize a decrease in pressure within the main reactor (230) due to the discharge of the treated water through the discharge pipe (240), a pressure maintaining means (250) may be provided on the discharge pipe (240). This pressure maintaining means (250) may be implemented through a structure that reduces the internal flow path of the discharge pipe (240).

[0120] In order to allow the treated water to undergo a final reaction inside the discharge tank (270) by spraying and discharging the treated water into the water inside the discharge tank (270) using residual energy and ozone, a spraying means (260) may be provided at the end of the discharge pipe (240).

[0121] The complete oxidation type ozone water treatment device according to the present invention is equipped with an oxidation catalyst injector (185) installed after the middle part of the gas-liquid contact reactor or downstream of the gas-liquid contact reactor. The oxidation catalyst injector (185) may be a radial catalyst injector capable of injecting an oxidation catalyst for advanced oxidation treatment, such as, for example, hydrogen peroxide or an inorganic or organic peroxide such as sodium percarbonate. The injected oxidation catalyst reacts with ozone to promote the production of ㆍOH radicals and / or OH- anions, thereby promoting the oxidation reaction treatment of pollutants contained in the raw water, thereby achieving an advanced oxidation treatment (AOP: Advanced Oxidation Process). Therefore, by additionally injecting the oxidation catalyst in the oxidation catalyst injector (185), the oxidation reaction of ozone gas is promoted, thereby achieving advanced oxidation, thereby further increasing the raw water treatment efficiency. By this, the ozone oxidation reaction efficiency can be increased to 99.99% or more, and through this, sterilization, algae removal, oxidation removal of inorganic substances including iron or manganese, treatment of organic substances such as phenol, and increased efficiency of subsequent activated carbon adsorption removal processes can be achieved. Here, the middle part of the gas-liquid contact reactor means a point after at least two reactors selected from among the plate-type mixing reactor (170), the multi-injection reactor (180), and the split shear reactor (190) constituting the gas-liquid contact reactor.

[0122] The complete oxidation type ozone water treatment device according to the present invention may further include a concentration meter (235) installed downstream of the oxidation catalyst injector (185) to measure the dissolved ozone concentration of the treated water downstream of the oxidation catalyst injector (185).

[0123] Ozone is classified as a toxic substance, and when it is dissolved in water in excess or leaked into the atmosphere and volatilized, it not only causes a strong foul odor and poses a serious threat to living organisms, but also causes corrosion of facilities such as machinery and electrical equipment, which places a burden on device maintenance. Therefore, the ozone water treatment device of the present invention further installs a concentration meter (235) for measuring the residual dissolved ozone concentration at an appropriate location downstream of the oxidation catalyst injector (185), so as to measure the residual dissolved ozone concentration of the treated water passing through the point, and then feeds this back to the ozone gas injector (140) and / or the oxidation catalyst injector (185), thereby controlling the ozone gas injection amount and / or the oxidation catalyst injection amount. For example, when the residual dissolved ozone concentration value measured by the concentration meter (235) is higher than a preset reference value, the ozone gas injection amount and / or the oxidation catalyst injection amount can be reduced and / or increased so that the residual dissolved ozone concentration value becomes lower than the preset reference value. This operation can be performed automatically through automatic control, thereby ensuring that the residual ozone concentration of the treated water measured by the concentration meter (235) is 0.01 weight ppm or less.

[0124] As described above, the configuration that connects the raw water tank (110) to the discharge tank (270) in the form of a single line is for a method of continuously transporting raw water and processing it once.

[0125] Meanwhile, according to the present invention, a method of repeating processing two or more times can be implemented depending on the raw water quality and treatment goal, and the configuration of this repeating processing method is shown in Fig. 7.

[0126] In the repetitive treatment method, a circulation pipe (280) is further provided to circulate a portion of the treated water toward the raw water tank (110) by branching off from the discharge pipe (240) that transports the treated water from the main reactor (230) to the discharge tank (270). That is, the treated water transported after being reacted in the main reactor (230) is divided into the discharge pipe (240) and the circulation pipe (280) in the middle and supplied to the discharge tank (270) and the raw water tank (110), respectively. In addition, a mixing supply device (290) is further provided in the raw water tank (110) so that the treated water supplied through the circulation pipe (280) for reprocessing and the raw water supplied from the raw water tank (110) can be sucked in and mixed together and supplied to the transport pipe (120).

[0127] As illustrated in Fig. 8, the mixing feeder (290) is formed with a mixing pipe (292) in which the inflowing tip side is formed as a large-diameter portion with a large diameter and the outflowing tip side is formed as a small-diameter portion with a relatively small diameter, and a strainer (294) provided in the center of the large-diameter portion to cover the inlet side of the small-diameter portion and to filter out foreign substances contained in the treated water and raw water being transported internally. Accordingly, the end of the circulation pipe (280) is inserted into the large-diameter portion of the mixing pipe (292) and comes into contact with the strainer (294), thereby directly supplying the treated water to the strainer (294), and the raw water in the raw water tank (110) is supplied through the space between the large-diameter portion of the mixing pipe (292) and the strainer (294), so that the treated water and the raw water are mixed and then supplied to the transport pipe (120).

[0128] In addition, although not shown, the ozone water treatment device according to the present invention may further include a control panel for performing overall operation control so as to enable automatic operation, and valve means (V) for opening and closing the supply of fluid, and hydraulic pressure meters (P) and flow meters (F) for measuring the pressure and flow rate of the fluid may be provided on the above-mentioned transfer pipe (120), ozone supply pipe (not shown), raw material gas supply pipe (not shown 5), discharge pipe (240), and circulation pipe (280).

[0129] In addition, the size, number, structure, etc. of each component and its attached auxiliary components can be appropriately determined by considering the raw water quality and quantity to be treated, target water quality, ozone gas injection amount, etc.

[0130] The operation of the complete oxidation type ozone water treatment device according to the present invention having the above configuration is described below.

[0131] First, when the transfer pump (130) is operated, the raw water to be treated stored in the raw water tank (110) is sucked in, transferred through the transfer pipe (120), and then supplied to the ozone gas injector (140). At this time, the raw water is provided with the energy required for water treatment by the transfer pump (130).

[0132] Of course, it is also possible to have the raw water receive potential energy due to the drop without using the transfer pump (130) and be supplied through the transfer pipe (120). Subsequently, the raw water supplied to the ozone gas injector (140) flows inside the ozone gas injector (140). At this time, the ozone gas generated in the ozone generator through the mechanism described above and then supplied through the ozone supply pipe at an appropriate pressure is dispersed and sprayed in the form of microbubbles through the microporous tube (141) in the ozone gas injector (140) and injected and mixed into the raw water flowing inside. The microbubble protection structure (143) and the microbubble diffusion promoting structure (145) promote the generation, dispersion, and turbulence of ozone gas microbubbles through the above-described combined action. Accordingly, the ozone gas microbubbles injected into the raw water to be treated can be effectively prevented or delayed from coalescing or disappearing prematurely, and the microbubbles can be effectively diffused to the downstream of the transport pipe. Therefore, the ozone water treatment device of the present invention can maximize the ozone utilization efficiency and improve the water treatment effect by fully utilizing the oxidation reaction ability of ozone gas by using this new type of ozone gas injector (140) system.

[0133] Thereafter, the ozone mixed water is continuously supplied to the plate-type mixing reactor (170) and accelerated, turbulent, divided, and sheared in the plate-type mixing reactor (170) to cause a contact reaction between the raw water and the ozone gas. Then, the ozone mixed water is continuously supplied to the multi-injection reactor (180) and accelerated, divided, sheared, swirled, turbulent, and counter-flowed in the multi-injection reactor (180) to cause a contact reaction between the raw water and the ozone gas again.

[0134] Next, the ozone mixed water is continuously supplied to the split shear reactor (190), where it is divided, sheared, inverted, and turbulentized, thereby causing a contact reaction again. Thereafter, the ozone mixed water passes through the multi-injection reactor (180) once again to promote the reaction, and then is supplied to the main reactor (230).

[0135] The ozone mixed water supplied to the main reactor (230) passes through the split shear reactor (190) built into the main reactor (230) to promote the reaction again, and then is supplied to the injection reverse mixing reactor (200), where it is accelerated, turbulent, swirled, and reversed to cause the reaction again. Then, the ozone mixed water discharged from the injection reverse mixing reactor (200) is discharged and received into the reaction tank (210) of the main reactor (230), and the flue gas remaining in the treated water while remaining in the reaction tank (210) is separated and discharged by the gas-liquid separation means (220) and removed.

[0136] After that, the treated water, which has been almost completely treated by passing through the main reactor (230), is discharged from the reaction tank (210) of the main reactor (230), transported through the discharge pipe (240), and then discharged into the water in the discharge tank (270) through the injection means (260) provided at the end of the discharge pipe (240). At this time, a concentration meter (235) installed in the middle of the discharge pipe (240) downstream of the oxidation catalyst injector (185) measures the dissolved ozone concentration of the treated water passing through it, and feeds the result back to the ozone gas injector (140) and / or the oxidation catalyst injector (185), thereby controlling the ozone gas injection amount and / or the oxidation catalyst injection amount. Subsequently, a final reaction is performed using the residual energy and residual ozone in the discharge tank (270).

[0137] In the case of a repeat treatment method, some of the treated water transported through the discharge pipe (240) is divided into a circulation pipe (280) that branches off in the middle and supplied to the raw water tank (110), and the treated water circulated for reprocessing is sucked and mixed with the raw water in a mixing feeder (290) and then transported again through the transport pipe (120).

[0138] Through the above-described mechanism of action, the ozone water treatment device of the present invention can further increase the raw water treatment efficiency by promoting the oxidation reaction of ozone gas through the combined action of a complete oxidation type ozone gas injector (140), injection of an oxidation catalyst such as hydrogen peroxide from an oxidation catalyst injector (185) installed after the middle part of a gas-liquid contact reactor or downstream of the gas-liquid contact reactor, and feedback control by a concentration meter (235). As a result, the ozone oxidation reaction efficiency can be increased to 99.99% or more, and in addition, an advanced water purification effect can be obtained so that the residual ozone concentration of the final treated water becomes 0.01 weight ppm or less.

[0139] The description of the present invention is essentially illustrative only, and therefore, modifications that do not depart from the essence of the present invention are intended to be within the scope of the present invention. Such modifications should not be considered as departing from the spirit and scope of the present invention.

[0140] The present invention can be used in the manufacture of a complete oxidation type ozone water treatment device used for water treatment.

Claims

1. A conveying pipe through which the raw water to be treated is conveyed and supplied; An ozone gas injector that injects and disperses ozone gas in the form of microbubbles into the raw water supplied and transported from the transport pipe in order to purify the raw water using the oxidation power of ozone; A gas-liquid contact reactor installed downstream of the ozone gas injector, which promotes contact reaction treatment between the raw water and the ozone gas in the ozone mixed water being transported through the transport pipe; and A discharge pipe is provided to continuously transport and discharge the treated water that has passed through the above-mentioned gas-liquid contact reactor. The ozone gas injector comprises a microporous tube having a plurality of micropores formed on the surface for injecting ozone gas supplied from an ozone generator into raw water in the form of microbubbles, a microbubble protection structure installed upstream of the microporous tube to prevent or at least delay the microbubbles from coalescing or disappearing due to the raw water flow, and a microbubble diffusion promoting structure installed downstream of the microporous tube to promote diffusion of the microbubbles generated by the microporous tube. Complete oxidation type ozone water treatment device.

2. A complete oxidation type ozone water treatment device, further comprising a turbulent flow converter installed upstream of the ozone gas injector in the first paragraph, which converts the flow state of the raw water supplied and transported from the transport pipe from laminar flow to turbulent flow to promote dispersion of the microbubbles in the raw water.

3. In the first or second paragraph, the microporous tube is installed so as to be detachably inserted into the interior of the main pipe from the upper portion of the main pipe of the ozone gas injector, and includes a microporous portion having a plurality of micropores formed on the surface, the microporous portion is formed on the lower side and the lower bottom portion of the microporous tube, and the lower bottom portion is installed so as to be spaced apart from the lower portion of the main pipe, a complete oxidation type ozone water treatment device.

4. In the third paragraph, the microbubble protection structure and the microbubble diffusion promotion structure are installed at a distance of 1 cm to 10 cm from the microporous tube, and when viewed from the flow direction of the raw water or the opposite direction to the flow direction of the raw water, the projection side cross-section of the microbubble protection structure or the microbubble diffusion promotion structure at least completely covers the projection side cross-section of the microporous portion of the microporous tube.

5. In the third paragraph, the microbubble protection structure and the microbubble diffusion promotion structure are columnar structures having a V-shaped cross-section, the columnar structure is fixed to the upper and lower portions of the main pipe inside the main pipe, and an upper plate and a lower plate are installed on the upper and lower cross-sections of the columnar structure to assist in fixing the columnar structure to the upper and lower portions of the main pipe, respectively. A complete oxidation type ozone water treatment device.

6. In the fifth paragraph, the microbubble protection structure and the microbubble diffusion promotion structure are completely oxidized ozone water treatment devices, wherein the angle between two straight lines forming a V shape in the V-shaped cross-section is 30° or more and 145° or less.

7. In the first or second paragraph, the microporous tubes are installed to form multiple rows of one to five rows, and one to five microporous tubes are installed in one row, and one row of the microbubble protection structure and one row of the microbubble diffusion promoting structure are installed upstream and downstream of each of the microporous tubes in each row, and in each row of the microbubble protection structure and each row of the microbubble diffusion promoting structure, the number of the microbubble protection structure and the microbubble diffusion promoting structure being the same as the number of the microporous tubes installed in each row of the microporous tubes, respectively, are installed to correspond to the microporous tubes.

8. In the 7th paragraph, a complete oxidation type ozone water treatment device, wherein only one row of the microbubble protection structure and the microbubble diffusion promotion structure is installed between the first and second rows of the microporous tubes, or between the second and third rows, or between the third and fourth rows, or between the fourth and fifth rows, so as to perform the roles of the two structures simultaneously.

9. A complete oxidation type ozone water treatment device according to claim 1 or 2, further comprising an oxidation catalyst injector installed after the stop section of the gas-liquid contact reactor or downstream of the gas-liquid contact reactor to inject an oxidation catalyst into the treated water being transported.

10. A complete oxidation type ozone water treatment device, further comprising a concentration meter installed downstream of the oxidation catalyst injector and measuring the concentration of dissolved ozone in the treated water downstream of the oxidation catalyst injector, in accordance with paragraph 9.

11. A complete oxidation type ozone water treatment device in the second paragraph, wherein the turbulent converter is at least one selected from among a grid mixer, a fixed wing mixer, and a rotary wing mixer installed inside the conveying pipe.

12. A complete oxidation type ozone water treatment device according to claim 1 or 2, wherein the microporous tube has a cylindrical shape.

13. In the first or second paragraph, the ozone generator that generates and supplies the ozone gas to be supplied to the ozone gas injector; and A complete oxidation type ozone water treatment device further comprising an ozone supply pipe for transporting and supplying the ozone gas supplied from the ozone generator to the ozone generator.

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