KR20050010143A - sequencing complexed ozone hydrogen peroxide and UV lights water treatment system and method thereby - Google Patents

Abstract

PURPOSE: To provide a water treatment system and a method therefor, which are able to completely treat wastewater by a direct reaction of wastewater with ozone, a hydrogen peroxide injection, and irradiation of UV light, if necessary, and decrease costs. CONSTITUTION: The system comprises a raw water tank (1) which supplies raw water, a water supply pump (2) which supplies energy required for water-treatment and supplies water, an ozone generator (20) which supplies adequate amount of ozone to water to be treated, an ejector (4) which ejects ozone to the water to be treated, reaction acceleration pipes (5,7) and mixture reactors (6,8) to accelerate dissolution of the ozone, a first reactor (10) having a spray pipe (9), an orifice-shaped reactor (11), a net-shaped reactor (12), and a gas-liquid separator (13) at the outside thereof, a connection flange (11) to discharge firstly treated water, a second reactor (29) having a hydrogen peroxide injector (23) and a hydrogen peroxide supply pump (24) to inject hydrogen peroxide to the treated water, an orifice-shaped reactor (30), and the gas-liquid separator at the outside thereof, a reaction pressure maintaining device (33) which separates gas remaining in the second reactor and discharge the separated gas to maintain a reaction pressure, and a spray pipe (35) which sprays water discharged from the reaction pressure maintaining device to underwater to complete water treatment.

Description

TECHNICAL FIELD The present invention relates to a continuous complex ozone water treatment system and method,

The present invention relates to a continuous complex ozone water treatment system and method, and more particularly, to a continuous ozone water treatment system and method which is capable of safely treating wastewater, which is not easily treated by a conventional method, with a minimum amount of energy and a minimum amount of ozone, hydrogen peroxide, The present invention relates to a continuous complex ozone water treatment system and method.

In general, the ozone water treatment method is a technical field in which a strong oxidizing power of ozone and an oxidation promoting method using a combination of hydrogen peroxide, a uv lamp, and the like with ozone are applied. As far as water treatment using ozone gas is concerned, (U) tube method, ozone gas injection method, etc. In addition, there is a method in which hydrogen peroxide is first put into the treated water by the oxidation promotion method, and the other method is an injector method, a pressurizing pump method, a turbine mixer method, Method.

In the dual acid system, ozone gas is diffused through the diffuser in the water, and the water is treated by deep diffused deep water and fine bubble generation by the diffuser. The water is treated by clogging of the micropore, difficulty in controlling the bubble size, It is difficult to make contact, dissolve, and react because of low oxygen injection energy, low ozone dissolution rate due to prolonged contact time, and low ozone dissolution efficiency and utilization rate due to expansion of self-decomposition. In addition, the treatment time is as long as 10 to 90 minutes, and since the concentration of exhaust ozone is high, there is a problem of environmental pollution, and besides water treatment, almost no practical use is failed.

Injector and other methods are used only in a very small-sized field because they do not have a complex processing function of dissolving in a single process method and processing the reaction continuously and rapidly, and practical use is very low due to lack of technology and lack of system design ability. There is a problem that the ozone is excessively consumed and the treatment efficiency is low by performing the ozone water treatment by the indirect reaction directly without the direct reaction of the ozone.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-described problems in the prior art, and it is an object of the present invention to provide a water treatment method, a water treatment method and a water treatment method in which ozone is directly subjected to water treatment, hydrogen peroxide is injected, The present invention provides a water treatment system and method for improving the completeness of water treatment by increasing the utilization rate of ozone by the system and method and reducing the cost.

1 is a flowchart illustrating a continuous complex ozone water treatment system according to the present invention.

FIG. 2 is a flowchart showing a water treatment system for completing a water treatment only by the primary treatment process according to the present invention.

[Description of Reference Numerals]

1: raw water tank 2: water pump

3: water supply pipe 4: ejector

5: reaction accelerating tube 6: mixing reactor

7: reaction promoting tube 8: mixing reactor

9: Dispenser 10: Primary reactor

11: Orifice type reactor 12: Mesh type reactor

13: gas-liquid separator (2) 14: water separator (2)

15: ozone decomposing vessel 16: backflow prevention device

17: Ozone piping 18: Reverse flow prevention piping

19: ozone supply / distribution controller 20: ozone generator

21: Measurement of residual concentration 22: Connection flange

23: hydrogen peroxide injector 24: hydrogen peroxide metering pump

25: hydrogen peroxide supply tank 26: mixed piping

27: Mixing reactor 28: uv light (253.7 nm) reactor

29: Secondary reactor 30: Orifice type reactor

31: Batch ozone decomposer 32: Discharge piping

33: reaction pressure retainer 34: discharge pipe

35: Dispenser 36: Treatment tank

In order to solve such a technical problem, the continuous composite ozone water treatment system includes a raw water tank for supplying raw water, a water pump for injecting and sending energy required for water treatment, an ozone generator for supplying ozone to the treated water, An ozone pipe for preventing the reverse flow of the treated water and for protecting the ozone generator, a backflow prevention pipe for preventing the ozonizer, an injector for injecting ozone into the treated water, and an outlet for reducing the cross- A first reactor for containing the gas-liquid separator, and a connection flange for transferring the treated water, which is completed in the first treatment, to the mixed pipe, A hydrogen peroxide injector and a hydrogen peroxide constant amount supply pump for injecting hydrogen peroxide into the treated water, and an orifice type reactor A second reactor for storing the gas-liquid separator; a reaction pressure holder for preventing the cyphon phenomenon and maintaining the pressure when the treated water is discharged; and a discharge water discharged from the reaction pressure holder is sprayed into the treated water tank to complete the water treatment And a sprayer for spraying the water.

Another constitution of the continuous composite ozone water treatment system of the present invention is characterized in that it comprises a raw water tank for supplying raw water, a water feed pump for injecting and sending the energy required for water treatment, an ozone generator for supplying ozone to the treated water, An ozone injector for injecting ozone into the treated water; a spray tube for reducing the cross-section of the outlet and changing the flow pattern of the treated water; and a discharge tube for preventing the reverse flow of the treated water and for protecting the ozone generator, A first reactor containing the above-mentioned injection pipe, an orifice type reactor and a mesh type reactor and enclosing the gas-liquid separator, a residual concentration measuring unit for collecting the sample to measure the first treatment result, A reaction pressure retainer for preventing the ciphone phenomenon and maintaining the pressure when the treated water is discharged; And spraying the discharged water discharged from the water treatment tank into the treated water tank to complete the water treatment.

Also, in the continuous complex water treatment system of the present invention, the reaction promoting tube for promoting dissolution and reaction of ozone by changing the flow shape of the treated water by a single tube (diameter reducing tube) prior to the first reaction, It is preferable that a mixing reactor for promoting the reaction by changing the flow rate, pressure, etc. is provided by using a device for dividing and redirecting the front end of the reactor.

Further, in the continuous combined water treatment system of the present invention, a water separator for separating moisture from the exhaust gas discharged from the exhaust gas after the first reaction and the second reaction using gravity and gravity, and a non-aggressive activated carbon decomposition type to decompose the residual ozone gas It is preferable that a ozone decomposing unit is provided.

In the continuous complex water treatment system of the present invention, it is preferable that a uv light reactor constituted by a uv lamp and a quartz tube is provided at the front end of the secondary reactor.

The continuous complex water treatment method of the present invention comprises the steps of supplying the necessary energy and raw water, supplying an appropriate amount of ozone necessary for the treatment, preventing reverse flow of the treated water in the ozone injection, The method comprising the steps of: contacting the ozone with the treated water to change the flow type, flow rate, pressure, etc. of the treated water to promote contact, dissolution and reaction of the ozone; and ozone reacts directly with the treated water to remove contaminants, Separating water from the residual gas separated from the water, decomposing the ozone gas from the residual gas and discharging it safely, measuring the result of the primary treatment, A step of discharging treated water while preventing a ciphone phenomenon and preventing a pressure change when completed, and a step of measuring a result of the primary treatment, Injecting hydrogen peroxide into the treated water so as to generate free radicals (mainly OH radicals) by continuously reacting with residual ozone if necessary, promoting the reaction so that free radicals are well formed, and using 0.3 to 2.0 ws / A step of irradiating the uv light with the free radical, and a step of oxidizing, decomposing and removing the remaining contaminants after the first treatment using the free radical, separating the residual gas from the water to complete the secondary treatment, Separating moisture from the gas, decomposing the ozone gas from the residual gas and discharging the ozone gas safely, safely discharging the second treated water, preventing the siphon phenomenon and maintaining the discharge pressure .

BRIEF DESCRIPTION OF THE DRAWINGS Fig.

As shown in FIG. 1, the construction of the continuous complex ozone water treatment system according to the present invention is as follows.

The raw water tank 1 is a water tank for supplying raw water, and the capacity of the apparatus can be safely operated by overcoming fluctuation of inflow amount of the treated water.

The water pump (2) supplies and supplies the energy required for the treatment of the treated water, and the pump having the highest efficiency in the flow rate and the head is selected and used.

The water supply pipe (3) is designed to supply the water to the ejector, so that the spare pump connection and operation are minimized.

The ejector 4 determines the amount of suction gas in accordance with the flow rate and pressure of the feed water. As the ozone gas is sucked by negative pressure, the ozone gas becomes fine due to the cavitation process, and the ozone gas dissolves and reacts by contact and pressurization, And the optimum efficiency is selected for the selection.

The reaction promoting tubes (5, 7) are a single tube (diameter reducing tube) that changes the flow pattern of the treated water and promotes the reaction by making it turbulent, and determines its shape and length according to the reaction rate.

The mixing reactors 6 and 8 mix and divide the treated water by means of the dividing and redirecting devices and promote the contact, reaction and dissolution by changing the flow rate and the pressure. The in-line static mixer mixer) and determine the element pitch, number and size according to the water quality and the degree of reaction of the treated water.

The spray tube 9 is configured such that the outlet cross-section is reduced in order to change the flow pattern of the treated water when spraying the treated water into the primary reactor.

The primary reactor 10 is a composite reactor in which a gas injection tube 9, an orifice type reactor 11 and a mesh type reactor 12 are built in and a gas-liquid separator 13 is enclosed.

The orifice type reactor 11 is a reactor provided inside the primary reactor and having a plurality of orifice holes in the disk.

The mesh type reactor (12) is installed inside the primary reactor and is a reactor in which a plurality of wire meshes are assembled.

The gas-liquid separator 13 is constituted by a commonly used rich-type check valve.

The water separator 14 is formed by filling a mesh type for separating moisture and a medium (sand, gravel, activated carbon) into a cylindrical shape.

The ozone decomposer 15 is selected by using pyrolysis type (high concentration), catalytic decomposition type (heavy concentration), and activated carbon decomposition type (low concentration type) depending on the ozone concentration. Is preferably used. Therefore, a perforated plate is provided inside the cylindrical shape, and soybean gravel and activated charcoal are filled thereon.

The backflow prevention device 16 is constituted by a cylindrical device for receiving and separating the check valve and moisture and gas countercurrent.

The ozone pipe 17 is a pipe for supplying ozone gas generated in the ozone generator to each ejector, and is constituted by a needle valve and a check valve necessary for adjusting the amount of ozone and maintaining the pressure inside the ozone generator.

The backflow prevention pipe (18) is a backflow preventing device that allows backflow to be discharged.

The ozone supply and distribution controller 19 is a device for distributing and regulating the supply of ozone. The ozone supply and distribution controller 19 is composed of a pressure control valve, a gas dividing line, and a valve.

The ozone generator 20 is composed of a raw material gas supply device, a cooling device, a power supply device, a concentration measuring device, and a driving control device.

The residual concentration measuring section 21 is a piping device for collecting the sample water to measure the treatment result of the primary processor.

The connection flange 22 is a piping connection flange to which the above-mentioned primary treatment (direct reaction treatment) is completed and discharged. In the case of the first treatment only, the discharge piping is connected. When the secondary treatment is continuously carried out, .

The hydrogen peroxide injector 23 is a device for injecting hydrogen peroxide into the process water, and is composed of an injection pipe, an injection nozzle and an installation pipe.

The hydrogen peroxide constant amount supply pump 24 is a pump for supplying pressure and quantity required for hydrogen peroxide injection.

The hydrogen peroxide storage tank 25 is a tank for storing hydrogen peroxide. The hydrogen peroxide storage tank 25 determines the amount of the hydrogen peroxide according to the usage amount and the time.

The mixing pipe 26 comprises a hydrogen peroxide injection tube and a cross-sectional reduction tube that allows the hydrogen peroxide injected into the treated water to mix quickly and uniformly.

The mixing reactor 27 is constructed in the same manner as in (6) above.

The uv light (253.7 nm) reactor 28 consists of a uv lamp and a quartz tube inside the tube.

The secondary reactor (29) is a complex reactor in which the orifice type reactor is built in and the gas-liquid separator is enclosed.

The orifice type reactor 30 is constructed in the same manner as in (11).

The ozone decomposing unit 31 is the same as the above-described (15), but has a very low concentration, so that the smaller capacity is used.

The discharge pipe 32 is a pipe for discharging the treated water uniformly while keeping the treated water treated in the secondary reactor at a constant pressure.

The reaction pressure retainer 33 is a cylindrical device in which an expansion pipe and an outflow pipe are built in.

The discharge pipe (34) is a pipe for discharging to the treated water tank from the reaction pressure maintaining device.

The spray tube 35 is a tube for spraying the treated water to the treatment water tank.

The treatment water tank 36 is a water tank for ultimately collecting and discharging treated water safely.

Hereinafter, the present invention will be described in more detail with reference to Examples. These embodiments are only for illustrating the present invention, and the scope of protection of the present invention is not limited by these embodiments.

The continuous composite ozone water treatment system of the present invention according to the above construction is composed of a primary treatment (direct reaction) process and a secondary treatment (indirect reaction) process by oxidation of ozone.

The raw water of the raw water tank is supplied through the water feed pump 2 and the ozone generated by the ozone generator 20 is mixed with the treated water by the ejector 4 to be mixed, contacted, dissolved and reacted.

When ozone is injected into the process water, ozone gas generated from a small number of generators is supplied to several ejectors by using the ozone supply / distribution controller 19. The amount of ozone suitable for each ejector is supplied, At this time, when reverse flow of the treated water occurs due to incompatibility of the water supply pressure, the ozone generator 20 and the ozone pipe 17 are damaged, and the reverse flow is discharged to the backflow prevention device 16.

The treated water into which the ozone is injected through the ejector 4 changes the flow pattern of the treated water in the reaction promoting pipes 5 and 7 to promote the dissolution and reaction of ozone.

In the mixing reactor (6, 8), the treated water and ozone are mixed and divided to promote contact, reaction and dissolution through changes in flow rate and pressure.

The treated water mixed with ozone is injected into the interior of the first reactor through the injection pipe 9. At this time, the flow shape is changed to promote the reaction, and the reaction of the orifice type reactor 11 and the mesh type reactor 12 The treated water is sprayed at a constant pressure in the secondary reactor 10 and sheared to accelerate the dissolution and reaction of the residual ozone gas.

When the primary treatment is completed, the gas-liquid separator 13 separates and discharges the residual gas from the treated water so as to maintain the reaction pressure of the primary reactor, and the water separator 14 separates moisture from the exhaust gas using the mesh and gravity The ozone decomposer 15 for decomposing and releasing the residual ozone gas again in the exhaust gas in which moisture is separated.

When the primary treatment process is completed, the sample concentration is measured through the residual concentration measurement unit 21, and the result of the primary treatment is measured.

If the water treatment can be completed only by the primary treatment using the connection flange 22 according to the measurement result, the discharge pipe 32 is connected. If the secondary treatment is required, the mixing pipe 26 is connected.

Hydrogen peroxide is injected through the hydrogen peroxide injector 23 into the treated water when the secondary treatment is necessary. At this time, the hydrogen peroxide injector equally injects three or more injection nozzles inside the connection pipe.

In the mixing reactor 27, the treated water into which the hydrogen peroxide is injected is mixed and homogenized to dissolve residual ozone and accelerate the reaction to promote the generation of free radicals.

At this time, depending on the quality of the treated water treated in the mixing reactor (27), it is determined whether or not UV irradiation (28) is performed. The irradiation amount is determined by referring to the turbidity, chromaticity, To 2.0 ws / cm < 2 >.

The treated water is sent to the secondary reactor 29 containing the orifice type reactor 30 to maintain the reaction pressure and time, and the secondary reaction is completed.

The exhaust gas after the secondary treatment is safely discharged using the gas-liquid separator 13, the water separator 14, and the ozone decomposer 31 as described above.

Up to this point, the secondary process is completed. When the secondary process is completed and the process water is discharged, the reaction pressure maintainer which prevents the cyclone phenomenon that may occur depending on the discharge position and maintains the reaction pressure constant according to the discharge location (33) are provided.

Also, in the continuous complex ozone water treatment method, ozone is injected into raw water by supplying necessary energy and raw water, and ozone is supplied to the raw water. At this time, an ozone amount suitable for treatment is supplied and reverse flow of treated water do.

The treated water injected with ozone is mixed, contacted and dissolved to promote the reaction. Thus, the ozone reaction is completed while maintaining the pressure constant in the treated water mixed with ozone. This completes the first reaction, in which the residual gas is separated and discharged from the treated water, the water is separated, and then the ozone is decomposed and discharged safely.

When this primary treatment process is completed, the sample number is sampled and the treatment result is measured. If the water treatment is completed only by the first treatment according to the measurement result, the water treatment is terminated, and if not, the second treatment process of the treatment water is started. If a secondary treatment is required, hydrogen peroxide is injected into the treated water. At this time, the optimal free radical is generated by mixing well.

Uv light irradiation is determined depending on the water quality of the treated water. The irradiation amount is determined based on the turbidity, chromaticity and suspended matters of the treated water, but the approximate use range is 0.3 to 2.0 ws / cm 2.

Maintain the reaction pressure to complete the secondary treatment. When the secondary treatment is completed, the residual gas is separated and discharged from the treated water, the water is separated, and the ozone is decomposed and discharged safely.

When the secondary treatment process is completed, the treated water is discharged. At this time, the cyclone phenomenon is prevented and the reaction pressure is kept constant according to the discharge place.

As described above, by increasing the ozone contact, reaction and dissolution rate and reacting the residual ozone concentration with the ozone gas repeatedly, it is possible to reduce the ozone generation cost by 60 ~ 80% By using hydrogen peroxide injection and uv light irradiation continuously, it is possible to treat ozone-repellent water quality in a subsequent process without using an activated carbon filter. In addition, it is possible to minimize the scale of the ozone water treatment facility and freely change the processing capacity from small size to large size. Therefore, the present treatment system and method are highly economical, stable, and highly utilizable, and thus are highly competitive, have a wide application field, and are expected to greatly contribute to the expansion of the application field of ozone treatment by simplifying treatment facilities.

Claims (6)

A raw water tank for supplying raw water; A water pump for injecting and sending energy required for water treatment; An ozone generator and an ozone supply / distribution controller for generating ozone and supplying ozone to the treated water; A backflow prevention device and a backflow prevention pipe for preventing the backflow of treated water during the ozone injection process to protect the ozonizer; An injector for injecting ozone into the treated water; A spray tube for reducing the cross-section of the outlet to change the flow pattern of the treated water; A primary reactor having the injection pipe, the orifice type reactor and the mesh type reactor and enclosing the gas-liquid separator; A connecting flange for sending and receiving the treated water in which the primary treatment is completed to the mixing pipe; A hydrogen peroxide injector and a hydrogen peroxide dosing pump for injecting hydrogen peroxide into the treated water treated in the primary reactor; A secondary reactor incorporating an orifice type reactor and enclosing a gas-liquid separator; A reaction pressure retainer for preventing the ciphone phenomenon and maintaining the pressure when the treated water is discharged; A spray tube for spraying discharged water discharged from the reaction pressure retainer into a treated water tank to complete water treatment; And a continuous ozone water treatment system A raw water tank for supplying raw water; A water pump for injecting and sending energy required for water treatment; An ozone generator and an ozone supply / distribution controller for generating ozone and supplying ozone to the treated water; A backflow prevention device and a backflow prevention pipe for preventing the backflow of treated water during the ozone injection process to protect the ozonizer; An injector for injecting ozone into the treated water; A spray tube for reducing the cross-section of the outlet to change the flow pattern of the treated water; A primary reactor having the injection tube, the orifice type reactor, and the mesh type reactor and enclosing the gas-liquid separator; A residual concentration measuring section for collecting the sample to measure the result of the primary treatment; A connection flange for transferring the treated water to the discharge pipe; A reaction pressure retainer for preventing the ciphone phenomenon and maintaining the pressure when the treated water is discharged; A spray tube for spraying discharged water discharged from the reaction pressure retainer into a treated water tank to complete water treatment; And a continuous ozone water treatment system 3. The method according to claim 1 or 2, A reaction accelerating tube for promoting the contact, dissolution and reaction of ozone by changing the flow pattern of the treated water by a single pipe at the front end of the first reactor and using a partitioning and redirecting element at the front end of the first reactor and the second reactor And a mixing reactor for promoting the reaction through a change in flow rate, pressure, etc. is added to the continuous ozone water treatment system 3. The method according to claim 1 or 2, A water separator for separating moisture from the exhaust gas after the primary reaction and the secondary reaction using gravity and gravity, and a ozone decomposer for decomposing residual ozone gas using a non-aggressive activated carbon decomposition method. Continuous complex ozone water treatment system The method according to claim 1, Characterized in that an uv light reactor composed of an uv lamp and a quartz tube is added to the front side of the secondary reactor, Supplying energy and raw water required for water treatment; Supplying an appropriate amount of ozone required for treatment; Injecting ozone into the raw water; Preventing reverse flow of treated water during ozone injection; Promoting the contact, dissolution and reaction of ozone by changing the flow type, flow rate, pressure, etc. of the treated water; The ozone reacts directly with the treated water to remove contaminants, and the residual gas is separated from water and discharged to complete the first treatment; Separating water from residual gas separated from water; Decomposing and discharging the ozone gas from the residual gas from which water is separated; Measuring the result of the first treatment and discharging treated water while preventing a ciphone phenomenon and preventing a pressure change when the water treatment is completed; Injecting hydrogen peroxide into the treated water so as to generate free radicals (mainly OH radicals) by reacting with the residual ozone continuously when the water treatment is not completed and the secondary treatment is required as a result of the measurement of the primary treatment result; Promoting the reaction so that free radicals are produced well; An uv light irradiation step using 0.3 to 2.0ws / cm < 2 >; Decomposing and removing the remaining contaminants after the first treatment using free radicals, separating and discharging the residual gas from the water, and completing the secondary treatment; Separating water from residual gas separated from water; Decomposing and discharging the ozone gas from the residual gas from which water is separated; A step of preventing a ciphone phenomenon and a discharge pressure change in discharging the second treated water; Wherein the continuous ozone water treatment method comprises: