Circulating water disinfecting and killing device and disinfecting and killing method thereof

Abstract

The invention relates to the technical field of aquaculture equipment, in particular to a circulating water disinfecting and killing device and a disinfecting and killing method thereof. A circulating water disinfecting and killing device comprises a booster water pump, a jet device, an ozone generator and a sterilizing reactor. The booster water pump and the ozone generator are connected with the jet device, and the booster water pump can convey tail water in the circulating water system into the jet device. The ozone generator is used for feeding ozone into the jet device through the air inlet pipe. The ozone and the tail water mixed in the jet device enter the sterilization reactor, and the tail water is sterilized in the sterilization reactor. According to the sterilization reactor, ozone overflowing from tail water treated by ozone can be reused, the utilization rate of the ozone is increased, and meanwhile, the problem of environmental pollution caused by direct emission of the overflowing ozone and ozone of treated water into the environment is also avoided.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture equipment, in particular to a circulating water disinfection device and a disinfection method thereof. Background Art

[0002] The facility-based recirculating aquaculture system is a new type of aquaculture method. It uses a series of water treatment units to treat the wastewater generated in the aquaculture pond and recycle it for reuse, aiming to improve the utilization rate of water resources and improve the aquaculture environment. The main principle of the recirculating aquaculture system is to integrate advanced technologies in the fields of environmental engineering, civil engineering, modern biology, and new electronics to remove harmful pollutants such as residual bait, feces, ammonia nitrogen, and nitrite nitrogen from the aquaculture water body, and to purify the aquaculture environment. The process of re-inputting the purified water into the aquaculture pond by physical filtration, biological filtration, removal of carbon dioxide, disinfection, oxygenation, desk lamps and other treatment methods can not only solve the problem of low water resource utilization, but also provide a stable, reliable, comfortable and high-quality living environment for aquaculture organisms, and provide favorable conditions for high-density aquaculture. However, the existing recirculating aquaculture system generally uses ultraviolet light or ozone for sterilization when disinfecting the aquaculture tail water. Among them, when ultraviolet light is used for sterilization, the pollutants in the tail water (such as algae, sticky particles, etc.) will be contaminated by the ultraviolet light tube for a long time, which will reduce the intensity of ultraviolet light and weaken its sterilization ability; secondly, ultraviolet light sterilization kills microorganisms by destroying the function of cell nucleic acid, but when the cell is in a light environment with a wavelength of 300nm-600nm (the wavelength of visible light is 390nm-780nm), the cell's DNA photolyase is activated and can directly repair the damaged DNA. Therefore, when the tail water flows through the irradiation of the ultraviolet lamp and causes damage to pathogenic bacteria and viruses, these pathogenic bacteria and viruses can also self-repair in the later stage, so the efficiency of ultraviolet light sterilization is low and cannot meet the needs of the recirculating aquaculture system.

[0003] Secondly, when the tail water is sterilized by ozone in the prior art, the ozone is dissolved in the tail water to achieve the sterilization treatment of the tail water. However, the prior art has the following disadvantages in this way: for example, the ozone remaining in the tail water will have an adverse effect on the subsequent treatment process of the circulating aquaculture water system, especially in the nitrification tank. The residual ozone may cause the concentration of microorganisms in the nitrification tank to decrease, thereby affecting the treatment efficiency of the nitrification tank for the tail water; secondly, after the tail water is treated by ozone in the prior art, part of the ozone dissolved in the water will be emitted from the water into the air, which will not only pollute the natural environment, but also pose a threat to the health of operators in the circulating aquaculture system. Summary of the invention

[0004] In order to solve the problem in the prior art that ozone remaining in the tail water of a circulating aquaculture system after ozone treatment will overflow into the air and pollute the environment, the present invention provides a circulating water disinfection device.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a circulating water disinfection device, which includes: a booster water pump, an ozone generator, an ejector and a sterilization reactor, the booster water pump is connected to the ejector, and is used to pressurize the tail water to be treated and transport it to the ejector, the ozone generator is connected to the ejector, and the ozone generator is used to transport the generated ozone to the ejector, and the tail water and ozone entering the ejector are mixed; the sterilization reactor includes:

[0006] A liquid inlet pipe, the liquid inlet pipe is connected to the ejector, the ejector transports the mixed tail water and ozone to the sterilization reactor through the liquid inlet pipe, and the ozone in the mixed liquid entering the sterilization reactor sterilizes the tail water;

[0007] Shell 1 is provided with a cavity, in which baffle 1 and baffle 2 are installed, baffle 2 is arranged in parallel with baffle 1 in the cavity, and baffle 1 is arranged on the side close to the liquid inlet pipe; baffle 1 is integrally extended upward from the bottom end surface of the cavity and does not contact the top end surface of the cavity; baffle 2 is integrally extended downward from the top end surface of the cavity and does not contact the bottom end surface of the cavity; baffle 1 divides the cavity into cavity 1 and cavity 2, and ... Second, the cavity is divided into cavity three and cavity four, and the cavity three and cavity four are arranged above the cavity one and cavity two in the vertical direction, and the cavity three is connected to the cavity one and cavity two respectively, and the cavity two is connected to the cavity three and cavity four respectively; the mixed ozone and tail water enter the cavity one and cavity two in sequence through the liquid inlet pipe, and the ozone sterilizes the tail water in the cavity one and cavity two regions, and the ozone overflowed during the sterilization process is gathered in the cavity three;

[0008] Pipe 1, the pipe 1 is installed on the upper end surface of the shell 1, and the pipe 1 is connected to the cavity 4;

[0009] Drain pipe 1, the drain pipe 1 is horizontally arranged and connected to the pipeline 1;

[0010] A gas return pipe, one end of which is connected to the pipe one, and the other end of which is connected to the ozone generator, and the height of the gas outlet of the gas return pipe in the vertical direction is higher than the height of the water outlet of the drain pipe one in the vertical direction.

[0011] As a further improvement of the above scheme, assume that the height of a side wall connected to the liquid inlet pipe on the sterilization separator is h, the length of baffle one is a, the length of baffle two is b, the distance from baffle one to the side wall connected to the liquid inlet pipe is c, and the distance from baffle two to the side wall connected to the liquid inlet pipe is d; wherein a, b and h satisfy: a+b<h; c and d satisfy: d>4c; b and c satisfy: 0.75c<b<c.

[0012] As a further improvement of the above scheme, a photocatalytic ozonation reaction device is also installed on one side of the baffle plate 2 close to the cavity 4, and the photocatalytic ozonation reaction device includes a shell 2, a plurality of ultraviolet lamps and a plurality of titanium dioxide films. The plurality of ultraviolet lamps are arranged in sequence along the width direction of the shell 2, and the plurality of titanium dioxide films are arranged in sequence along the length direction of the shell 2, and the titanium dioxide films are arranged on the outside of the ultraviolet lamps. The light source of the ultraviolet lamps is irradiated to the titanium dioxide films and stimulates the titanium dioxide films to adsorb ozone molecules to generate active oxygen free radicals. The generated active oxygen free radicals are used to sterilize the tail water.

[0013] As a further improvement of the above solution, a check valve is provided between the ozone generator and the ejector, and the flow direction of the check valve is from the ozone generator to the ejector.

[0014] As a further improvement of the above solution, a flow meter is provided between the ozone generator and the check valve, and the flow meter is used to measure the flow rate of ozone delivered from the ozone generator to the ejector.

[0015] As a further improvement of the above solution, a pressure gauge is installed in the sterilization reactor, and the pressure gauge is used to monitor the pressure in the sterilization reactor in real time.

[0016] As a further improvement of the above solution, the liquid inlet pipe is arranged at the bottom of a side wall of the shell, and the liquid inlet pipe is used to connect the ejector and the cavity one.

[0017] As a further improvement of the above scheme, the sterilization reactor is a rectangular structure, and a drain pipe 2 is provided on the side wall corresponding to the side wall connected to the liquid inlet pipe. The drain pipe 2 is arranged at the lowest end of the side wall, and the drain pipe 2 is connected to the cavity 2.

[0018] A circulating water disinfection method adopts the above-mentioned circulating water disinfection device to sterilize tail water.

[0019] A circulating water disinfection method comprises the following steps: S1, respectively delivering pressurized tail water and ozone to the ejector; the ozone and the pressurized tail water can be preliminarily mixed in the ejector;

[0020] S2, transporting the preliminarily mixed tail water and ozone to the sterilization reactor, in which the ozone can sterilize the tail water, and the overflowed ozone can also flow back to the ozone generator through the gas reflux pipe, and the sterilized tail water is discharged through the drain pipe 1;

[0021] The tail water and ozone preliminarily mixed in the sterilization reactor will be processed through the following steps: S21, the ozone and tail water mixed in the ejector enter the cavity one through the liquid inlet pipe, and the ozone entering the cavity one can sterilize the tail water; and the ozone treated in the cavity one will overflow and gather in the cavity three; S22, when the water volume in the cavity one is higher than the height of the baffle one, the tail water in the cavity one will overflow the baffle one and enter the cavity three. In the chamber 2, at this time, the ozone in the tail water in the chamber 1 and the chamber 2 continues to overflow and gather in the chamber 3; S23, when the height of the tail water in the chamber 2 rises to be flush with the bottom of the baffle 2, the content of ozone in the chamber 3 is still gradually increasing, and at this time, the pressure on both sides of the baffle 2 is in balance; S24; as the liquid inlet pipe continues to transport the mixed liquid of ozone and tail water to the chamber 1, the content of ozone in the chamber 3 is more than that in step S23, and the ozone compressed in the chamber 3 Under the action of , the liquid levels on both sides of the baffle plate 2 rise at different speeds, the liquid level on the right side of the baffle plate 2 is higher than that on the left side, and as the pressure gradually increases, the liquid in the cavity 4 will continue to rise along the pipeline until it is discharged from the drain pipe 1, and the pressure on the right side of the baffle plate 2 remains stable at this time; S25, as the pressure in the cavity 3 further increases until the ozone content in the cavity 3 exceeds the upper limit it can accommodate, the ozone will pass through the baffle plate 2 under pressure and flow back to the ozone generator along the right side of the baffle plate 2 through the pipeline 1 and the gas reflux pipe in turn, and then the pressure in the cavity 3 is released, and the liquid in the cavity 4 and the pipeline 1 falls back under the action of gravity to fill the volume of the ozone diffused in the cavity 3, so that the sterilization reactor enters a pressurized state again; S26, after entering the pressurized state, the sterilization reactor will cycle steps S24 to S25 for many times until all the tail water is sterilized, and the operation of the circulating water disinfection device is terminated.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The structure of the sterilization reactor designed by the present invention can perform automatic pressurization, decompression, exhaust and other operations, thereby achieving efficient mixing and utilization of ozone and tail water. The reactor has the advantages of high stability, high operating efficiency, high work efficiency, high safety, low construction cost, etc., and is suitable for facility-based recirculating aquaculture systems of various sizes.

[0024] (2) The sterilization reactor of the present invention can reuse the ozone that overflows from the tail water after ozone treatment, thereby improving its utilization rate. At the same time, the ozone contained in the treated water body is utilized through a photocatalytic ozonation reaction device, so that it is converted into active oxygen free radicals, which greatly improves the working efficiency of the ozone treatment of the tail water. At the same time, it also avoids the problem of environmental pollution caused by the overflow ozone and the ozone in the treated water body being directly discharged into the environment.

[0025] (3) The ozone overflow can be collected and reused through the sterilization reactor, greatly reducing the harm of ozone diffusion to operators.

[0026] (4) During the treatment process, the booster pump and the ozone generator of the circulating water disinfection device of the present invention are in a normally open state, so that the tail water can be continuously treated, which greatly improves its treatment efficiency. At the same time, no human intervention is required in this process, so the tail water can be automatically treated.

[0027] (5) By using ozone to treat tail water, it can effectively replace the use of chemical drugs for sterilization, greatly reducing the toxicity of drugs in the water, thereby improving the breeding efficiency during the breeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of the circulating water disinfection device provided by the present invention.

[0029] Figure 2 A stereoscopic diagram of the sterilization reactor provided by the present invention.

[0030] Figure 3 A top view of the sterilization reactor provided by the present invention.

[0031] Figure 4 The present invention provides Figure 3 Enlarged view of the cross section along AA.

[0032] Figure 5 This is a schematic structural diagram of the sterilization reactor provided by the present invention.

[0033] Figure 6 This is a gas-liquid phase distribution diagram when the liquid in the second cavity of the sterilization reactor provided by the present invention rises to the bottom of the second baffle.

[0034] Figure 7The gas-liquid phase distribution diagram in the sterilization reactor provided by the present invention is when the amount of ozone accumulated in the cavity three just reaches the length of the baffle two.

[0035] Figure 8 The present invention provides a gas-liquid phase distribution diagram in the sterilization reactor at the moment when the ozone accumulated in the cavity three in the sterilization reactor passes through the baffle two.

[0036] Fig. 9 The diagram is a gas-liquid phase distribution diagram in the sterilization reactor provided by the present invention after the ozone in the cavity three passes through the baffle two and undergoes the next round of pressurization.

[0037] Fig.10 This is a pressure distribution diagram of the sterilization reactor provided by the present invention when it is in a pressurized state.

[0038] Fig.11 This is a pressure distribution diagram of the sterilization reactor provided by the present invention when it is in a continuous pressurization state.

[0039] Fig.12 This is a schematic structural diagram of the photocatalytic ozonation reaction device provided by the present invention.

[0040] In the figure: 1. Booster pump; 2. Ozone generator; 3. Ejector; 4. Sterilization reactor; 41. Liquid inlet pipe; 42. Shell 1; 421. Cavity 1; 422. Cavity 2; 423. Cavity 3; 424. Cavity 4; 43. Baffle 1; 44. Baffle 2; 45. Pipe 1; 46. Drain pipe 1; 47. Gas reflux pipe; 48. Drain pipe 2; 51. Shell 2; 52. Ultraviolet lamp; 53. Titanium dioxide film. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0042] In the description of the present invention, it should be noted that for directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions and positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention. The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. The terms "including" and "having" in the specification and claims of the present invention and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] Reference Figure 1 As shown, a circulating water disinfection device provided by one embodiment of the present invention comprises a booster water pump 1, an ejector 3, an ozone generator 2 and a sterilization reactor 4. The ejector 3 is provided with a water inlet pipe, an air inlet pipe and a liquid outlet pipe. One end of the water inlet pipe is connected to the booster water pump 1, and the other end of the water inlet pipe is connected to the ejector 3. The booster water pump 1 can transport the tail water in the circulating water system to the ejector 3. One end of the air inlet pipe is connected to the ozone generator 2, and the other end of the air inlet pipe is connected to the ejector pipe. The ozone generator 2 is used to generate ozone, and the generated ozone enters the ejector 3 through the air inlet pipe. The ozone entering the ejector 3 can be dissolved in the tail water, and the ozone dissolved in the tail water can sterilize the tail water; the liquid outlet pipe of the ejector 3 is connected to the liquid inlet pipe 41 of the sterilization reactor 4, and the liquid inlet pipe 41 of the sterilization reactor 4 is arranged on the side of the sterilization reactor 4 and is located at the bottom of the side. The ozone and tail water mixed in the ejector 3 enter the sterilization reactor 4, and the tail water is sterilized in the sterilization reactor 4.

[0044] Reference Figures 2 to 4As shown, the sterilization reactor 4 is also provided with a pipe 45, a drain pipe 46 and a gas return pipe 47. The pipe 45 is vertically installed on the upper end surface of the sterilization reactor 4 and connected to the cavity. The outlet of the pipe 45 is connected to the drain pipe 46 and the gas return pipe 47 respectively. The gas return pipe 47 is vertically arranged, and the drain pipe 46 is horizontally arranged. The height of the gas outlet of the gas return pipe 47 in the vertical direction is higher than the height of the water outlet of the drain pipe 46. The gas return pipe 47 and the drain pipe 46 form an L-shaped structure, so that the liquid in the pipe 45 can be discharged from the drain pipe 46, and the gas entering the pipe 45 can be discharged from the gas return pipe 47. The sterilization reactor 4 is provided with a cavity, and a baffle 43 and a baffle 44 are provided in the cavity. The baffle 43 is integrally extended upward from the bottom end surface of the cavity and does not contact the top end surface of the cavity. The baffle 43 is arranged on the side of the liquid inlet pipe 41 close to the sterilization reactor 4. The baffle plate 2 44 is integrally extended downward from the end surface of the top of the cavity and does not contact the end surface of the bottom of the cavity. The baffle plate 2 44 is arranged on a side close to the pipe 1 45, and the baffle plate 2 44 is in the same plane with the outermost side wall of the pipe 1 45 close to the baffle plate 2 44 in the vertical direction.

[0045] The gas outlet of the gas reflux pipe 47 is connected to the gas inlet 1 of the ozone generator 2. The gas reflux pipe 47 is used to transport the diffused ozone in the sterilization reactor 4 to the ozone generator 2 for reuse, thereby improving the utilization rate of ozone. In addition, the gas reflux pipe 47 can also effectively prevent ozone from overflowing, greatly reducing the harm caused by ozone diffusion to operators.

[0046] The inner diameter of the gas return pipe 47 can be 60% of the inner diameter of the pipeline 1 45, and a cyclone separator can be installed at the inlet of the gas return pipe 47. The cone angle of the cyclone separator is 20°, and the separation efficiency is not less than 95%.

[0047] Please refer to Figure 4, baffle 1 43 can separate the cavity into cavity 1 421 and cavity 2 422, and baffle 2 44 can separate the cavity into cavity 3 423 and cavity 4 424. Cavity 3 423 and cavity 4 424 are arranged above cavity 1 421 and cavity 2 422 in the vertical direction, cavity 3 423 is connected to cavity 1 421 and cavity 2 422 respectively, and cavity 2 422 is connected to cavity 3 423 and cavity 4 424 respectively. Through this arrangement, the movement path of the mixed ozone and tail water in the sterilization reactor 4 can be increased, thereby providing more time for ozone treatment of tail water, thereby improving the treatment efficiency of ozone. In addition, the tail water entering the sterilization reactor 4 is in a pressurized state, so it can dissolve more ozone, so that ozone and tail water can fully contact to achieve sterilization treatment of the tail water. The sterilization method in the sterilization reactor 4 is as follows: the ozone and tail water mixed in the ejector 3 enter the cavity 1 421 through the liquid inlet pipe 41, and the ozone entering the cavity 1 421 can sterilize the tail water, and the ozone after the tail water treatment in the cavity 1 421 will overflow and gather in the cavity 3 423. When the amount of water in the cavity 1 421 is higher than the height of the baffle 1 43, the liquid in the cavity 1 421 overflows the baffle 1 43 and enters the cavity 2 422. At this time, the ozone in the mixed liquid in the cavity 1 421 and the cavity 2 422 continues to overflow and gather in the cavity 3 423. When the height of the mixed liquid in the cavity 2 422 rises to the level of the bottom of the baffle 2 44, the amount of ozone in the cavity 3 423 is already large, and the pressure on both sides of the baffle 2 44 is balanced. If liquid is transported into the cavity again, the ozone overflowing from the liquid will enter the cavity three 423, making the cavity three 423 in a pressurized state. Under the pressure of the cavity three 423, the liquid levels on both sides of the baffle two 44 rise at different speeds, and the liquid level on the right side of the baffle two 44 is higher than that on the left side. Therefore, the tail water separated from the ozone in the cavity two 422 can enter the pipe one 45 along the right side of the baffle two 44. As the pressure in the cavity three 423 increases, the liquid on the right side of the baffle two 44 will continue to rise along the pipe one 45 until it rises to the drain pipe one 46 and the tail water is discharged through the drain pipe one 46. When the liquid on the right side of the baffle two 44 is discharged through the drain pipe one 46, the pressure on the right side of the baffle two 44 is fixed. As the liquid inlet pipe 41 continues to enter the mixed liquid, the ozone in the cavity three 423 is still increasing. When the amount of ozone in the cavity three 423 accumulates to the upper limit that the cavity three 423 can accommodate, the ozone will pass through the baffle two 44 under high pressure and flow back to the ozone generator 2 along the right side of the baffle two 44 through the pipe one 45 and the gas reflux pipe 47 in turn, thereby realizing the collection and treatment of the ozone.When ozone passes through baffle two 44, the pressure in cavity three 423 is released. At this time, the liquid in cavity four 424 and pipe one 45 falls back due to gravity, and the volume of the falling water column fills the volume of ozone diffused in cavity three 423, causing the reactor to enter a pressurized state again, thereby once again circulating a series of operations after pressurization.

[0048] Please refer to Figure 5 The sterilization separator can be a rectangular parallelepiped structure, assuming that the height of a side wall connected to the liquid inlet pipe 41 is h, the length of the baffle 1 43 is a, the length of the baffle 2 44 is b, the distance between the baffle 1 43 and the side wall connected to the liquid inlet pipe 41 is c, and the distance between the baffle 2 44 and the side wall connected to the liquid inlet pipe 41 is d. Among them, a, b and h need to satisfy: a+b<h, c and d need to satisfy d>4c, and b and c need to satisfy 0.75c<b<c.

[0049] It can be understood that in this embodiment, by setting baffle 1 43, the cavity can be divided into cavity 1 421 and cavity 2 422. Cavity 1 421 is connected to the liquid inlet pipe 41, and the distance from baffle 1 43 to the side wall connected to the liquid inlet pipe 41 is c, and the distance from baffle 2 44 to the liquid inlet pipe 41 is d. The relationship between d and c needs to satisfy d>4c, which shows that the volume of cavity 1 421 is much smaller than the volume of cavity 2 422. By setting such a small volume of cavity 1 421, the mixing effect between ozone and tail water can be effectively improved, thereby improving the treatment efficiency of ozone to tail water. In addition, baffle 1 43 is set, and when the liquid level in cavity 1 421 rises to be flush with the upper end surface of baffle 1 43, under such a small volume and high water level strong turbulent power, the mass transfer rate is improved, which is conducive to enhancing the hybrid power of ozone and tail water, thereby improving the treatment efficiency of ozone to tail water. In addition, in the present embodiment, cavity three 423 is set to be connected to cavity one 421 and cavity two 422 respectively, so that ozone overflowing from cavity one 421 or cavity two 422 can be gathered into cavity three 423, thereby realizing unified collection of ozone overflowing during the disinfection process.

[0050] In this embodiment, the volume of the second cavity 422 can be expanded by limiting the relationship between c and d, so that the ozone in the second cavity 422 can fully react with water, thereby improving the treatment effect of ozone on tail water.

[0051] In this embodiment, the relationship between b and c is limited to 0.75c<b<c. ​​The purpose is that the length of the baffle plate 2 44 should not be too short, that is, the minimum length of the baffle plate 2 44 needs to be greater than 0.75 times the distance c between the baffle plate 1 43 and the side wall connected to the liquid inlet pipe 41, so that the space of the cavity 3 423 enclosed by the baffle plate 2 44 and the sterilization reactor 4 is large enough, so that the cavity 3 423 can accommodate enough ozone, and accommodating enough ozone will form high pressure in the cavity 3 423, and under high pressure environment, the solubility of ozone in water will increase, thereby improving the sterilization effect of ozone on tail water. In addition, the length of b is limited to a maximum of c. The purpose is that if the length b of the baffle plate 2 44 is too long, the amount of ozone accumulated in the cavity 3 423 will be too much and cannot quickly pass through the baffle plate 2 44 and be discharged from the pipe 1 45 and the gas return pipe 47, which will easily cause water hammer phenomenon in the process, and the water hammer phenomenon will cause serious damage to the entire device, thereby affecting the normal operation of the entire circulating water disinfection device. Therefore, in the actual design process, a, b and h need to satisfy: a+b<h.

[0052] In other embodiments, the length of baffle 1 43 may be 50%-70% of the cavity height h. The distance between baffle 1 43 and the side wall of the liquid inlet pipe 41 is 20%-30% of the cavity height h. The distance between baffle 2 44 and the side wall of the liquid inlet pipe 41 is 80%-90% of the cavity height h.

[0053] The sterilization reactor of the present invention is suitable for treating tail water with a flow rate of 10-50 L / min and a tail water ozone concentration of 0.4-0.6 mg / L.

[0054] The gas-liquid phase distribution at each stage during the operation of the sterilization reactor 4 is described as follows:

[0055] in Figures 6 to 11 In the figure, blue represents the liquid phase, red represents the gas phase, and green represents the gas-liquid mixture.

[0056] First Look Figure 6 , Figure 6The liquid in the second cavity 422 of the sterilization reactor 4 rises to the bottom of the second baffle 44. At this time, the reactor is in an initial state where pressurization has not yet begun. At this time, the capacity of ozone in the third cavity 423 is already large, and the liquid level heights on both sides of the second baffle 44 are the same, which means that the air pressure on both sides of the second baffle 44 is also balanced. With the continuous addition of the mixed liquid in the liquid inlet pipe 41, the third cavity 423 is in a pressurized state. Under the pressure of the third cavity 423, not only can the solubility of ozone in the second cavity 422 in the tail water be enhanced, but also the liquid in the second cavity 422 can be sent to the pipe 1 45. As the pressure in the third cavity 423 gradually increases, the liquid in the second cavity 422 will rise along the pipe 1 45 until it is discharged from the drain pipe 1 46. When the liquid in the second cavity 422 is discharged from the drain pipe 1 46, the pressure on the right side of the baffle 2 44 remains stable. As the amount of liquid in the liquid inlet pipe 41 increases in the cavity 3 423, more and more ozone is accumulated in the cavity 3 423 until the amount of ozone accumulated in the cavity 3 423 just reaches the length of the baffle 2 44. At this time, the gas-liquid distribution in the sterilization reactor 4 is as follows: Figure 7 As shown, at this time, the compressed gas phase in cavity three 423 is about to cross from the left side of baffle two 44 to the right side of baffle two 44. At the next moment, since the liquid inlet pipe 41 is still feeding liquid, the compressed gas phase in cavity three 423 will cross baffle two 44 and flow back to the ozone generator 2 along pipe one 45 and gas return pipe 47. When the gas in cavity three 423 is discharged, the liquid in pipe one 45 will flow back under the action of gravity and fill the space of the escaped gas phase in cavity three 423. At this time, the relative pressure of the gas phase in the reactor is relatively low. This part can be referred to Figure 8 When the gas phase escapes, the sterilization reactor 4 will start a new round of increase, as shown in Fig. 9 shown.

[0057] like Fig.10 and Fig.11 This is a distribution diagram of the relative pressure of the gas phase inside the sterilization reactor 4 when it is in operation. Fig.10 It is a pressure distribution diagram of the sterilization reactor 4 when it is just pressurized. Fig.11 It is a pressure distribution diagram when the sterilization reactor 4 is in a continuous pressurization state.

[0058] pass Fig.10 and Fig.11 It can be seen that when the sterilization reactor 4 is in operation, the cavity 3 423 is always in a high pressure state. The high pressure state can increase the solubility of ozone in the tail water, thereby improving the ozone treatment efficiency of the tail water.

[0059] In addition, since the device is used to process the tail water in the circulating aquaculture system, its working environment is generally humid and has a lot of moisture, which makes the electronic components in the device susceptible to moisture and short circuit. In this embodiment, the pressure change in the sterilization reactor 4 is not controlled by an automatic exhaust valve or other equipment, which minimizes the number of air components and reduces the possibility of affecting the operation of the device due to component damage, greatly improving the stability of the operation of the entire device.

[0060] In addition, the operation process of the existing tail water disinfection device is generally a series of operations including mixing, water shut-off, exhaust, drainage, and remixing. This series of operations requires the entire tail water sterilization process to be divided into multiple cycles, and needs to be carried out cycle by cycle. Human control is required in this process, and the water inlet and ozone equipment need to be shut down after a cycle. This makes the operation of the entire equipment very cumbersome. During the operation of the circulating water disinfection device in this embodiment, the booster pump 1 and the ozone generator 2 can be in a normally open state, thereby achieving continuous and effective sterilization of the tail water, and this continuous treatment process does not require human intervention, greatly improving its degree of automation.

[0061] In this embodiment, a photocatalytic ozonation reaction device may be installed on the right side of the baffle 2 44, which utilizes the principle of photocatalytic ozonation to achieve oxidative degradation of harmful substances in the tail water. The specific principle is to contact the photocatalyst with ozone, and the photocatalyst absorbs light energy to excite electrons to form active species, which then react with ozone to generate oxidants, thereby oxidizing and degrading harmful substances.

[0062] Please refer to Fig.12 The photocatalytic ozonation reaction device includes a second housing 51, a plurality of ultraviolet lamps 52, and a plurality of titanium dioxide films 53. The plurality of ultraviolet lamps 52 are sequentially arranged along the width direction of the second housing 51, and the plurality of titanium dioxide films 53 are sequentially arranged along the length direction of the second housing 51, and the titanium dioxide films 53 are arranged outside the ultraviolet lamps 52, so that the light source of the ultraviolet lamps 52 can irradiate the titanium dioxide films 53. In this embodiment, the ultraviolet light emitted by the ultraviolet lamps 52 can excite the surface of the titanium dioxide films 53, generate photoexcited electron-hole pairs, and ozone molecules can be adsorbed on the surface of the titanium dioxide films 53, and generate active oxygen free radicals. These free radicals can react with organic pollutants, microorganisms and harmful chemicals in water, thereby playing the role of degradation, sterilization and disinfection, and reducing toxicity.

[0063] By setting up a photocatalytic ozonation reaction device, the ozone entering the cavity four 424 can be converted into active oxygen free radicals, so that this part of the ozone can be utilized and prevented from being released into the environment and causing pollution to the environment. At the same time, the tail water in the pipeline one 45 can be treated again to improve the treatment efficiency and treatment effect of the tail water.

[0064] The power of the ultraviolet lamp 52 can be 8W, the distance between two adjacent ultraviolet lamps 52 is 6cm, and the wavelength is 254-365nm. The coating thickness of the titanium dioxide film 53 can be 150nm, and the arrangement angle can be 45°. The flow rate of the tail water passing through the photocatalytic ozone reaction device can be 1.5m / s, which can ensure that the efficiency of the photocatalytic ozone reaction device in converting ozone into active oxygen free radicals reaches 90%.

[0065] It can be understood that in this embodiment, by designing the structure of the sterilization reactor 4 and installing a photocatalytic ozonation reaction device on the side of the baffle plate 2 44 connected to the pipe 1 45, it is possible to ensure that ozone is fully mixed with the tail water and the tail water is treated, and at the same time, the treated ozone can be collected through the cavity 3 423, and then the ozone remaining in the treated tail water is treated with the photocatalytic ozonation reaction device, so that the treated tail water basically does not contain ozone, and even if it contains ozone, it is only a very small content. If it is necessary to further treat this low content of ozone in the tail water, this embodiment sets a drain pipe 1 46, which can uniformly collect the tail water after ozone treatment, and in the subsequent stage, other existing means can be used to further treat the very small amount of ozone remaining in the tail water.

[0066] The gas source used in the ozone generator 2 can be liquid oxygen or air.

[0067] In this embodiment, since the amount of water to be treated is relatively small, an air source can be selected as the gas source for the ozone generator 2 to generate ozone.

[0068] It is understandable that the ozone generator 2 is also provided with an air inlet 2, which is used to transport liquid oxygen or air into the ozone generator 2 so that the liquid oxygen or air is converted into ozone molecules in the ozone generator 2. The air inlet 1 is connected to the air inlet 2. The purpose of setting the position of the air inlet 1 here is that after the ozone generator 2 is started, the air inlet 2 will generate wind pressure into the ozone generator 2. Under the action of this wind pressure, the gas in the gas return pipe 47 will enter the ozone generator 2 along the air inlet 1, and will not flow in the opposite direction, nor will it flow outward along the air inlet 1, thereby achieving the situation that the gas in the gas return pipe 47 will not diffuse outward.

[0069] It is understandable that when the concentration of ozone in the water body is between 0.4mg / L and 0.6mg / L, ozone has a good bactericidal effect. The daily processing capacity of facility-based circulating tail water is large. If a single medium-sized breeding workshop has 40 breeding pools, the daily tail water treatment exchange capacity is about 2,000 cubic meters. If 5 grams of ozone are mixed per cubic meter of water, about 7.14 grams of ozone need to be used. It can be seen that the ozone dissipated into the air daily for 2,000 cubic meters of tail water treatment is about 4,285.71 grams, and the 4,285.71 grams of ozone dissipated into the air requires more than 16.48 million cubic meters of air to neutralize. Through the circulating water disinfection device of this embodiment, it can effectively recycle the ozone overflowing from the water body, and can also further oxidize the ozone dissolved in the tail water through a photocatalytic ozonation reaction device and produce active oxygen free radicals, which can react with organic pollutants, microorganisms and harmful chemicals in the water, thereby playing a role in degradation, sterilization and degradation of toxicity.

[0070] A one-way valve is provided between the ozone generator 2 and the sterilization reactor 4 , which can only allow the ozone generated by the ozone generator 2 to flow into the sterilization reactor 4 .

[0071] A flow meter is provided between the ozone generator 2 and the one-way valve, and the flow meter is used to count the amount of ozone delivered by the ozone generator 2 to the sterilization reactor 4 .

[0072] A pressure gauge is provided in the cavity of the sterilization reactor 4, and the pressure gauge is used to monitor the pressure change in the cavity in real time.

[0073] The length of the pipeline 1 45 can be adjusted. In the actual processing process, the upper limit of the working pressure in the sterilization reactor 4 can be adjusted by replacing pipelines 1 45 of different lengths. The longer the pipeline 1 45 is, the greater the upper limit of the working pressure in the sterilization reactor 4 is.

[0074] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A circulating water disinfection device, characterized in that: It includes: A booster water pump (1), an ozone generator (2), an ejector (3) and a sterilization reactor (4), wherein the booster water pump (1) is connected to the ejector (3) and is used to pressurize the tail water to be treated and then transport it to the ejector (3), the ozone generator (2) is connected to the ejector (3), and the ozone generator (2) is used to transport the generated ozone to the ejector (3), so that the tail water and ozone entering the ejector (3) are mixed; The sterilization reactor (4) comprises: a liquid inlet pipe (41), the liquid inlet pipe (41) being connected to the ejector (3), the ejector (3) conveying the mixed tail water and ozone to the sterilization reactor (4) through the liquid inlet pipe (41), so that the ozone in the mixed liquid entering the sterilization reactor (4) can sterilize the tail water; A shell (42) is provided with a cavity, wherein a baffle plate (43) and a baffle plate (44) are installed in the cavity, wherein the baffle plate (44) is arranged in parallel with the baffle plate (43) in the cavity, and the baffle plate (43) is arranged on a side close to the liquid inlet pipe (41); the baffle plate (43) is integrally extended upward from the bottom end surface of the cavity and does not contact the top end surface of the cavity; the baffle plate (44) is integrally extended downward from the top end surface of the cavity and does not contact the bottom end surface of the cavity; the baffle plate (43) is capable of dividing the cavity into a cavity (421) and a cavity (422), and the baffle plate (44) is capable of dividing the cavity into a cavity (423) and a cavity (424). 3) and cavity four (424), the cavity three (423) and the cavity four (424) are arranged above the cavity one (421) and the cavity two (422) in the vertical direction, the cavity three (423) is connected to the cavity one (421) and the cavity two (422) respectively, and the cavity two (422) is connected to the cavity three (423) and the cavity four (424) respectively; the mixed ozone and tail water enter the cavity one (421) and the cavity two (422) in turn through the liquid inlet pipe (41), and the ozone sterilizes the tail water in the cavity one (421) and the cavity two (422) area, and the ozone overflowed during the sterilization process is gathered in the cavity three (423); Pipe 1 (45), the pipe 1 (45) is installed on the upper end surface of the shell 1 (42), the pipe 1 (45) is connected to the cavity 4 (424), a drainage pipe 1 (46), wherein the drainage pipe 1 (46) is arranged horizontally and is connected to the pipeline 1 (45), A gas return pipe (47), one end of which is connected to the pipeline (45), and the other end of which is connected to the ozone generator (2), and the height of the gas outlet of the gas return pipe (47) in the vertical direction is higher than the height of the water outlet of the drain pipe (46).

2. The circulating water disinfection device according to claim 1, characterized in that The height of a side wall of the sterilizing separator connected to the liquid inlet pipe (41) is h, the length of the baffle plate 1 (43) is a, the length of the baffle plate 2 (44) is b, the distance from the baffle plate 1 (43) to the side wall connected to the liquid inlet pipe (41) is c, and the distance from the baffle plate 2 (44) to the side wall connected to the liquid inlet pipe (41) is d; Among them, a, b and h satisfy: a+b<h; c and d satisfy: d>4c; b and c satisfy: 0.75c<b<c.

3. The circulating water disinfection device according to claim 1, characterized in that: A photocatalytic ozonation reaction device is also installed on one side of the baffle plate 2 (44) close to the cavity 4 (424), and the photocatalytic ozonation reaction device includes a shell 2 (51), a plurality of ultraviolet lamps (52) and a plurality of titanium dioxide films (53). The plurality of ultraviolet lamps (52) are arranged in sequence along the width direction of the shell 2 (51), and the plurality of titanium dioxide films (53) are arranged in sequence along the length direction of the shell 2 (51), and the titanium dioxide films (53) are arranged on the outside of the ultraviolet lamps (52). The light source of the ultraviolet lamps (52) can irradiate the titanium dioxide films (53) and excite the titanium dioxide films (53) to adsorb ozone molecules to generate active oxygen free radicals. The generated active oxygen free radicals are used to sterilize the tail water.

4. The circulating water disinfection device according to claim 1, characterized in that: A check valve is provided between the ozone generator (2) and the ejector (3), and the flow direction of the check valve is from the ozone generator (2) to the ejector (3).

5. The circulating water disinfection device according to claim 4, characterized in that: A flow meter is provided between the ozone generator (2) and the check valve, and the flow meter is used to measure the flow rate of ozone delivered from the ozone generator (2) to the ejector (3).

6. The circulating water disinfection device according to claim 1, characterized in that: A pressure gauge is installed in the sterilization reactor (4), and the pressure gauge is used to monitor the pressure in the sterilization reactor (4) in real time.

7. The circulating water disinfection device according to claim 1, characterized in that: The liquid inlet pipe (41) is arranged at the bottom end of the side wall of the shell one (42), and the liquid inlet pipe (41) is used to connect the ejector (3) and the cavity one (421).

8. The circulating water disinfection device according to claim 1, characterized in that: The sterilization reactor (4) is a rectangular parallelepiped structure, and a second drain pipe (48) is provided on the side wall corresponding to the side wall connected to the liquid inlet pipe (41). The second drain pipe (48) is arranged at the lowest end of the side wall, and the second drain pipe (48) is connected to the second cavity (422).

9. A method for disinfecting a circulating water disinfection device, characterized in that: It includes the following steps: S1, respectively conveying the pressurized tail water and ozone to the ejector (3) of the circulating water disinfection device according to any one of claims 1 to 8; the ozone and the pressurized tail water can be preliminarily mixed in the ejector (3); S2, the tail water and ozone after preliminary mixing are transported to the sterilization reactor (4), in which the ozone can sterilize the tail water, and the overflowed ozone can also flow back to the ozone generator (2) through the gas reflux pipe (47), and the sterilized tail water is discharged through the drain pipe (46).

10. The method for disinfecting circulating water according to claim 9, characterized in that: The step S2 includes the following steps: S21, the ozone and tail water mixed in the ejector (3) enter the cavity one (421) through the liquid inlet pipe (41), and the ozone entering the cavity one (421) can sterilize the tail water; and the ozone after the tail water is treated in the cavity one (421) will overflow and gather in the cavity three (423); S22, when the water volume in the cavity one (421) is higher than the height of the baffle one (43), the tail water in the cavity one (421) will overflow the baffle one (43) and enter the cavity two (422), at this time the cavity The ozone in the tail water in the chamber one (421) and the chamber two (422) continues to overflow and gather in the chamber three (423); S23, when the height of the tail water in the chamber two (422) rises to be flush with the bottom of the baffle two (44), the content of ozone in the chamber three (423) is still gradually increasing, and at this time the pressure on both sides of the baffle two (44) is in balance; S24; as the liquid inlet pipe (41) continues to transport the mixed liquid of ozone and tail water to the chamber one (421), at this time the content of ozone in the chamber three (423) is more than that in step S23, and the compressed liquid in the chamber three (423) Under the action of ozone, the liquid level on both sides of the baffle plate 2 (44) rises at different speeds, the liquid level on the right side of the baffle plate 2 (44) is higher than that on the left side, and as the pressure gradually increases, the liquid in the cavity 4 (424) will rise along the pipe 1 (45) until it is discharged from the drain pipe 1 (46), at which time the pressure on the right side of the baffle plate 2 (44) remains stable; S25, as the pressure of the cavity 3 (423) further increases until the ozone content in the cavity 3 (423) exceeds the upper limit it can accommodate, the ozone will pass through the baffle plate 2 (44) under pressure and flow along the baffle plate 2 (44) ) on the right side through the pipe one (45) and the gas return pipe (47) to the ozone generator (2), and then the pressure in the cavity three (423) is released, and the liquid in the cavity four (424) and the pipe one (45) falls back due to gravity to fill the volume of the ozone diffused in the cavity three (423), so that the sterilization reactor (4) enters the pressurized state again; S26, after entering the pressurized state, the sterilization reactor (4) will cycle steps S24 to S25 for multiple times until all the tail water is sterilized, and the operation of the circulating water disinfection device is terminated.

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