Ozone advanced oxidation system

Abstract

The utility model discloses an ozone advanced oxidation system which comprises a circulating water pipe, a booster pump, a jet device, an ozone supply device, an ozone dissolving tank and an AOP reactor, a liquid inlet end of the booster pump is communicated with an upstream end of the circulating water pipe, a liquid outlet end of the booster pump is connected with a liquid inlet of the jet device, the ozone supply device is connected with a gas inlet of the jet device, a liquid outlet of the jet device is connected with a liquid inlet of the ozone dissolving tank, and a liquid outlet of the ozone dissolving tank is communicated with a downstream end of the circulating water pipe. A liquid outlet of the circulating water pipe is connected with the AOP reactor, a generating unit capable of generating ultraviolet rays is arranged in the AOP reactor, the ultraviolet rays can catalyze ozone to generate hydroxyl groups, and the hydroxyl groups have the strongest oxidability and can instantly decompose various organic matters. The ozone advanced oxidation system uses hydroxyl, ultraviolet and ozone for sterilization and disinfection, can thoroughly kill various microorganisms, has a better sterilization and disinfection effect than pure ozone disinfection, and has the advantages of simple structure, convenience in operation, low use cost and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of disinfection and sterilization, and particularly relates to an ozone advanced oxidation system. Background Art

[0002] As a public recreational place, swimming pools are loved by more and more people. Since swimmers are in direct contact with the pool water, they will secrete sweat, urea and other organic matter and microorganisms during swimming and playing in the water, which will cause certain pollution to the pool water. If the pool water is unhygienic, it will cause health problems for swimmers. Swimming pool water needs to be continuously disinfected and sterilized to ensure the health of swimmers. In this regard, the international advanced standards that have reached consensus have set limits on the amount of dissolved organic matter in pool water, requiring that the COD of swimming pool water should be less than 100%. Mn The increase in chemical oxygen demand (COD) does not exceed 3 mg / L, and the best way to reduce COD in swimming pool water is to use oxidation decomposition, among which the strongest oxidant is hydroxyl. In the existing swimming pool disinfection system, the swimming pool water to be treated is usually injected into the ozone reaction tank to react with ozone to achieve the purpose of oxidative decomposition of organic matter and sterilization and disinfection; due to the limited reaction time, the ozone dissolved in the water cannot be completely oxidized and consumed, and ozone will have adverse effects on the human body; therefore, the disinfection system also needs to set up an activated carbon adsorption tank to adsorb unreacted ozone; in addition, the activated carbon adsorption tank will also adsorb chlorine in the pool water, which requires adding more chlorine to the disinfected pool water, increasing the disinfection cost of the swimming pool and generating more disinfection by-products that are harmful to health; and the activated carbon adsorption tank needs to be backwashed or replaced with activated carbon after a period of use, thereby increasing the use cost of the disinfection system. In addition, although ozone is a strong oxidant, its oxidation is selective, and the oxidation products of ozone are mostly small molecular carboxylic acids, ketones and aldehydes, which are difficult to completely degrade organic matter into carbon dioxide and water. Utility Model Content

[0003] In view of the above problems, the utility model discloses a method to overcome the above problems or at least partially solve the above problems.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses an ozone advanced oxidation system, comprising a circulating water pipe, a booster pump, an ejector, an ozone supply device, an ozone dissolving tank and an AOP reactor;

[0006] The liquid inlet end of the booster pump is connected to the upstream end of the circulating water pipe, the liquid outlet end of the booster pump is connected to the liquid inlet of the ejector, the ozone supply device is connected to the air inlet of the ejector, the liquid outlet of the ejector is connected to the liquid inlet of the ozone dissolving tank, the liquid outlet of the ozone dissolving tank is connected to the downstream end of the circulating water pipe, the liquid outlet of the circulating water pipe is connected to the AOP reactor, and the AOP reactor is provided with a generating unit capable of generating ultraviolet rays.

[0007] Furthermore, a pipeline mixer is provided in the pipeline between the circulating water pipe and the AOP reactor.

[0008] Furthermore, the generating unit is a low-pressure ultraviolet lamp or a medium-pressure ultraviolet lamp.

[0009] Further, the ozone supply device includes an ozone generator;

[0010] The ozone generator is connected to the air inlet of the ejector.

[0011] Furthermore, it also includes an automatic exhaust valve and an exhaust gas decomposer;

[0012] The automatic exhaust valve is arranged at the upper end of the ozone dissolving tank and is used to discharge ozone that is not dissolved in water. The tail gas decomposer is connected to the automatic exhaust valve and is used to decompose ozone.

[0013] Further, the exhaust gas decomposer comprises a housing, a first sieve plate and a second sieve plate;

[0014] A containing cavity is formed in the housing, the first sieve plate and the second sieve plate are both located in the containing cavity, and the first sieve plate is arranged above the second sieve plate, and a catalyst for catalyzing ozone decomposition is filled between the first sieve plate and the second sieve plate;

[0015] An air outlet is provided on the shell above the first sieve plate, an air inlet is provided on the shell below the second sieve plate, and a water outlet is provided at the lower end of the shell.

[0016] Furthermore, the tail gas decomposer also includes a heating tube;

[0017] The heating tube is inserted into the catalyst to heat the catalyst.

[0018] Furthermore, the tail gas decomposer also includes a temperature sensor and a controller;

[0019] The temperature sensor is used to detect the temperature of the catalyst, and the controller is electrically connected to the temperature sensor and the heating tube respectively.

[0020] The advantages and beneficial effects of the utility model are:

[0021] In the ozone advanced oxidation system of the utility model, a booster pump and an ejector are provided so that high-concentration ozone can enter the ozone dissolution tank and be pressurized and dissolved in water to form high-concentration ozone water, which then enters the circulating water pipe and is mixed with the main water flow to be treated, and an AOP reactor is provided at the liquid outlet of the circulating water pipe so that ozone produces hydroxyl groups under the irradiation of ultraviolet rays in the AOP reactor, and the hydroxyl groups can instantly complete oxidation reactions with organic matter in the water, and achieve thorough sterilization of various microorganisms by hydroxyl groups, ultraviolet rays and ozone, which is better than the effect of simple ozone oxidation disinfection; in addition, the AOP reactor can convert ozone into hydroxyl groups, and there is no need to provide an activated carbon adsorption tank to adsorb and decompose residual ozone in the water, so that the ozone advanced oxidation system has a simple structure, convenient operation and lower use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the connection structure of an ozone advanced oxidation system in one embodiment of the utility model;

[0024] Figure 2 It is a three-dimensional structural diagram of an ozone advanced oxidation system in one embodiment of the utility model;

[0025] Figure 3 It is a left side view of an ozone advanced oxidation system in one embodiment of the utility model;

[0026] Figure 4 It is an axial cross-sectional view of an exhaust gas decomposer in one embodiment of the utility model.

[0027] In the figure: 1. Booster pump; 2. Ejector; 3. Ozone dissolving tank; 4. AOP reactor; 5. Circulating water pipe; 6. Water seal tank; 7. Automatic exhaust valve; 8. Tail gas decomposer; 9. Liquid outlet pipe; 10. Support frame; 11. Shell; 12. First sieve plate; 13. Second sieve plate; 14. Catalyst; 15. Air outlet; 16. Air inlet; 17. Water outlet; 18. Heating tube; 19. Seal; 20. Insulating sleeve; 21. Temperature sensor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In one embodiment of the present invention, an ozone advanced oxidation system is provided, such as Figure 1 and Figure 2 As shown, the ozone advanced oxidation system includes a booster pump 1, an ejector 2, an ozone supply device, an ozone dissolving tank 3, an AOP reactor 4 and a circulating water pipe 5.

[0031] Specifically, the liquid inlet of the circulating water pipe 5 is connected to the filtered water, the liquid inlet end of the booster pump 1 is connected to the upstream end of the circulating water pipe 5, and the liquid outlet end of the booster pump 1 is connected to the liquid inlet of the ejector 2. The booster pump 1 is used to pressurize and pump part of the water to be treated in the circulating water pipe 5 into the ejector 2 to form a water flow to be treated. The ozone supply device is connected to the air inlet of the ejector 2 to provide high-concentration ozone. The liquid outlet of the ejector 2 is connected to the liquid inlet of the ozone dissolution tank 3. Negative pressure suction is generated in the ejector 2 to bring the high-concentration ozone supplied by the ozone supply device into the ozone dissolution tank 3 to form high-concentration ozone water.

[0032] In addition, the liquid outlet of the ozone dissolving tank 3 is connected to the downstream end of the circulating water pipe 5, and the liquid outlet of the circulating water pipe 5 is connected to the AOP reactor 4, so that the high-concentration ozone water enters the circulating water pipe and mixes with the main water flow to be treated before entering the AOP reactor 4; in this way, it is not necessary to make all the water to be treated pass through the ozone reaction tank, and only part of the water to be treated needs to be pumped into the ozone reaction tank to form high-concentration ozone water. On the one hand, the ozone advanced oxidation system can treat more water to be treated, and on the other hand, it reduces the investment and floor space of the ozone dissolving tank. A generating unit capable of generating ultraviolet rays is provided in the AOP reactor 4. The generating unit generates ultraviolet rays, so that the ozone passing through the AOP reactor 4 is converted into hydroxyl. Since hydroxyl has stronger oxidizing properties than ozone, it can completely decompose organic matter into carbon dioxide and water, and its oxidation and decomposition of organic matter has better effect and stronger disinfection ability. In addition, since the AOP reactor 4 can convert ozone into hydroxyl, there is no need to set an activated carbon adsorption tank to adsorb unoxidized ozone, and there is no need to replace activated carbon and perform backwashing, thereby reducing the cost of sterilization and disinfection.

[0033] Wherein, the generating unit is a low-pressure ultraviolet lamp or a medium-pressure ultraviolet lamp; preferably, the generating unit is a low-pressure ultraviolet lamp, and can emit ultraviolet rays with a wavelength of 185nm or 254nm.

[0034] The principle of ozone conversion to form hydroxyl radicals is as follows:

[0035] Taking the ultraviolet wavelength of 254nm as an example, ozone undergoes photolysis under the irradiation of 254nm ultraviolet light to form atomic oxygen O( 1 D) and molecular oxygen, O( 1 D) atom is a very active form of atomic oxygen, which can react with water vapor to produce hydroxyl radicals. The specific reaction steps are as follows:

[0036] O3( 1 A)+hv(253.7nm)→O( 1 D)+O2( 1 Δg or 1 Σg + )

[0037] O( 1 D)+O2→O( 3 P)+O2( 1 Σ+g)

[0038] O( 1 D)+O3→O2+2O( 3 P)

[0039] H2O+O( 1 D) →2OH

[0040] In summary, in the ozone advanced oxidation system of the present embodiment, a booster pump and an ejector are provided so that high-concentration ozone can enter the ozone dissolution tank and be pressurized and dissolved in the pool water to form high-concentration ozone water. The high-concentration ozone water then enters the circulating water pipe and mixes with the main water flow to be treated. In addition, an AOP reactor is provided at the liquid outlet of the circulating water pipe so that ozone produces hydroxyl groups under the irradiation of ultraviolet rays in the AOP reactor. Hydroxyl groups can instantly complete oxidation reactions with organic matter in the water, and achieve thorough disinfection of various microorganisms by hydroxyl groups, ultraviolet rays and ozone, which is better than the oxidation and disinfection effect of simple ozone. In addition, the AOP reactor can completely convert ozone into hydroxyl groups, and there is no need to provide an activated carbon adsorption tank to adsorb and decompose residual ozone in the water, so that the ozone advanced oxidation system has a simple structure, convenient operation and lower use cost.

[0041] In this embodiment, if Figure 1 As shown, a pipeline mixer is provided in the pipeline between the circulating water pipe and the AOP reactor, and the pipeline mixer enables the high-concentration ozone water to be fully mixed with the main water flow to be treated in the circulating water pipe.

[0042] And, if Figure 1 As shown, a filter can be arranged before the liquid inlet of the circulating water pipe to filter out suspended matter and colloids in the water to be treated.

[0043] In this embodiment, if Figure 1 As shown, the ozone supply device includes an ozone generator.

[0044] The ozone generator is connected to the air inlet 16 of the ejector 2, and the ozone generator is used to generate ozone. Figure 1 and Figure 2 As shown, a water seal tank 6 may also be provided between the ozone generator and the ejector 2. The water seal tank 6 is provided with an anti-backflow structure, which can prevent the water in the ejector 2 from flowing back into the ozone generator when the booster pump 1 stops working.

[0045] And, if Figures 1 to 3 As shown, the ozone advanced oxidation system also includes an automatic exhaust valve 7 and a tail gas decomposer 8.

[0046] The automatic exhaust valve 7 is arranged at the upper end of the ozone dissolving tank 3 for discharging ozone that is not dissolved in water. The tail gas decomposer 8 is connected to the automatic exhaust valve 7 for decomposing ozone to prevent ozone from polluting the environment.

[0047] In addition, if Figure 2 As shown, the booster pump 1, the ejector 2, the ozone dissolving tank 3, the AOP reactor 4 and the water seal tank 6 are all arranged and fixed on the support frame 10, so that the structure of the ozone advanced oxidation system is more compact, which is convenient for the placement and transportation of the ozone advanced oxidation system.

[0048] Furthermore, if Figure 4 As shown, the tail gas decomposer comprises a housing 11, a first sieve plate 12 and a second sieve plate 13. Wherein, ventilation holes are formed on the first sieve plate and the second sieve plate.

[0049] Specifically, a accommodating cavity is formed in the shell 11, the first sieve plate 12 and the second sieve plate 13 are both located in the accommodating cavity, and the first sieve plate 12 is arranged above the second sieve plate 13, and a catalyst 14 for catalyzing ozone decomposition is filled between the first sieve plate 12 and the second sieve plate 13; an air outlet 15 is opened on the shell 11 above the first sieve plate 12, an air inlet 16 is opened on the shell 11 below the second sieve plate 13, and a water outlet 17 is opened at the lower end of the shell 11.

[0050] When the exhaust decomposer is treating the exhaust gas, the ozone exhaust gas enters the containing chamber from the air inlet 16, and the water vapor in the ozone exhaust gas forms condensed water when contacting the second sieve plate 13 and is discharged from the water outlet 17. The ozone passes through the second sieve plate 13 to reach the catalyst 14, and is catalytically decomposed by the catalyst 14. The decomposition product passes through the first sieve plate 12 and is finally discharged from the air outlet 15.

[0051] In addition, if Figure 4 As shown, the exhaust gas decomposer further includes a heating pipe 18 .

[0052] The heating tube 18 is inserted into the accommodating cavity from the upper end of the shell 11, and further inserted into the catalyst 14, for heating the catalyst 14 so that the catalyst 14 can achieve the best catalytic effect; and the setting of the heating tube 18 can also prevent the catalyst 14 from absorbing water and causing the catalytic efficiency to decrease. Specifically, the upper end of the heating tube 18 is covered with an insulating sleeve 20 for achieving insulation between the heating tube 18 and the shell 11, and a sealing member 19 is provided between the insulating sleeve 20 and the shell 11 to achieve sealing between the insulating sleeve 20 and the shell 11.

[0053] In addition, if Figure 4 As shown, the exhaust gas decomposer also includes a temperature sensor 21 and a controller (not shown in the figure).

[0054] The temperature sensor 21 is inserted into the catalyst 14 to detect the temperature of the catalyst 14. The controller is electrically connected to the temperature sensor 21 and the heating tube 18, respectively, to receive the temperature signal of the temperature sensor 21 and send a control signal to the heating tube 18. When the temperature sensor 21 detects that the temperature of the catalyst 14 reaches 100°C, the controller controls the heating tube 18 to stop heating. When the temperature sensor 21 detects that the catalyst 14 naturally cools down to 60°C, the controller controls the heating tube 18 to start heating, so that the temperature of the catalyst 14 is always maintained at 60°C to 100°C, thereby effectively solving the ozone exhaust problem and extending the service life of the exhaust decomposer.

[0055] The above description is only a specific implementation of the present invention. Under the above teaching of the present invention, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present invention, and the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An ozone advanced oxidation system, characterized in that: It includes circulating water pipe, booster pump, ejector, ozone supply device, ozone dissolving tank and AOP reactor; The liquid inlet end of the booster pump is connected to the upstream end of the circulating water pipe, the liquid outlet end of the booster pump is connected to the liquid inlet of the ejector, the ozone supply device is connected to the air inlet of the ejector, the liquid outlet of the ejector is connected to the liquid inlet of the ozone dissolving tank, the liquid outlet of the ozone dissolving tank is connected to the downstream end of the circulating water pipe, the liquid outlet of the circulating water pipe is connected to the AOP reactor, and the AOP reactor is provided with a generating unit capable of generating ultraviolet rays.

2. The ozone advanced oxidation system according to claim 1, characterized in that: A pipeline mixer is provided in the pipeline between the circulating water pipe and the AOP reactor.

3. The ozone advanced oxidation system according to claim 1, characterized in that: The generating unit is a low-pressure ultraviolet lamp or a medium-pressure ultraviolet lamp.

4. The ozone advanced oxidation system according to claim 1, characterized in that: The ozone supply device comprises an ozone generator; The ozone generator is connected to the air inlet of the ejector.

5. The ozone advanced oxidation system according to any one of claims 1 to 4, characterized in that: It also includes an automatic exhaust valve and an exhaust gas decomposer; The automatic exhaust valve is arranged at the upper end of the ozone dissolving tank and is used to discharge ozone that is not dissolved in water. The tail gas decomposer is connected to the automatic exhaust valve and is used to decompose ozone.

6. The ozone advanced oxidation system according to claim 5, characterized in that: The tail gas decomposer comprises a housing, a first sieve plate and a second sieve plate; A containing cavity is formed in the housing, the first sieve plate and the second sieve plate are both located in the containing cavity, and the first sieve plate is arranged above the second sieve plate, and a catalyst for catalyzing ozone decomposition is filled between the first sieve plate and the second sieve plate; An air outlet is provided on the shell above the first sieve plate, an air inlet is provided on the shell below the second sieve plate, and a water outlet is provided at the lower end of the shell.

7. The ozone advanced oxidation system according to claim 6, characterized in that: The tail gas decomposer also includes a heating tube; The heating tube is inserted into the catalyst to heat the catalyst.

8. The ozone advanced oxidation system according to claim 7, characterized in that: The tail gas decomposer also includes a temperature sensor and a controller; The temperature sensor is used to detect the temperature of the catalyst, and the controller is electrically connected to the temperature sensor and the heating tube respectively.

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