Search

CN-119874013-B - Circulating water disinfection device and disinfection method thereof

CN119874013BCN 119874013 BCN119874013 BCN 119874013BCN-119874013-B

Abstract

The invention relates to the technical field of aquaculture equipment, in particular to a circulating water disinfection device and a disinfection method thereof. The circulating water sterilizing device comprises a booster water pump, an ejector, an ozone generator and a sterilizing reactor. The booster water pump and the ozone generator are respectively 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 leading ozone into the jet device through the air inlet pipe. Ozone and tail water mixed in the ejector enter a sterilizing reactor, and the tail water is sterilized in the sterilizing reactor. The sterilizing reactor can reuse the overflowed ozone in the tail water treated by ozone, so that the utilization rate of the ozone is improved, and the problem of environmental pollution caused by directly discharging the overflowed ozone and the ozone in the treated water is avoided.

Inventors

  • WANG XIANG
  • ZHANG JING
  • MEI JIE
  • HUANG LONG
  • LIANG YANGYANG

Assignees

  • 安徽省农业科学院水产研究所

Dates

Publication Date
20260512
Application Date
20250124

Claims (9)

  1. 1. The circulating water disinfection device is characterized by comprising a booster water pump (1), an ozone generator (2), an ejector (3) and a disinfection reactor (4), wherein the booster water pump (1) is connected with the ejector (3) and is used for pressurizing tail water to be treated and then conveying the tail water into the ejector (3), the ozone generator (2) is connected with the ejector (3), the ozone generator (2) is used for conveying generated ozone into the ejector (3) and mixing tail water and ozone entering the ejector (3), and the disinfection reactor (4) comprises: The liquid inlet pipe (41), the liquid inlet pipe (41) is connected with the ejector (3), the ejector (3) conveys mixed tail water and ozone into the sterilization reactor (4) through the liquid inlet pipe (41), and ozone in mixed liquid entering the sterilization reactor (4) can sterilize the tail water; A first shell (42) provided with a cavity, wherein a first baffle (43) and a second baffle (44) are arranged in the cavity, the second baffle (44) and the first baffle (43) are arranged in parallel in the cavity, the first baffle (43) is arranged on one side close to the liquid inlet pipe (41), the first baffle (43) integrally extends upwards from the bottom end surface of the cavity and is not contacted with the top end surface of the cavity, the second baffle (44) integrally extends downwards from the top end surface of the cavity and is not contacted with the bottom end surface of the cavity, the first baffle (43) can divide the cavity into a first cavity (421) and a second cavity (422), the second baffle (44) can divide the cavity into a third cavity (423) and a fourth cavity (424), the third cavity (423) and the fourth cavity (424) are vertically arranged on the first cavity (421) and the second cavity (422) respectively, the third cavity (423) and the fourth cavity (422) are communicated with each other through the second cavity (422) and the third cavity (422) and the fourth cavity (422) respectively, ozone in the first cavity (421) and the second cavity (422) areas is used for sterilizing tail water, and overflowed ozone in the sterilizing process is gathered in the third cavity (423); A first pipeline (45), wherein the first pipeline (45) is arranged on the upper end surface of the first shell (42), the first pipeline (45) is communicated with the fourth cavity (424), A first drain pipe (46), wherein the first drain pipe (46) is horizontally arranged, the first drain pipe (46) is communicated with the first pipeline (45), A gas return pipe (47), wherein one end of the gas return pipe (47) is communicated with the first pipeline (45), the other end of the gas return pipe (47) is communicated with the ozone generator (2), and the height of an air outlet of the gas return pipe (47) in the vertical direction is higher than the height of a water outlet of the first drain pipe (46); The sterilization reactor (4) is of a rectangular structure, the height of a side wall connected with the liquid inlet pipe (41) on the sterilization reactor (4) is set to be h, the length of the first baffle plate (43) is a, the length of the second baffle plate (44) is b, the distance from the first baffle plate (43) to the side wall connected with the liquid inlet pipe (41) is c, and the distance from the second baffle plate (44) to the side wall connected with the liquid inlet pipe (41) is d; wherein a, b and h satisfy a+b < h, between c and d satisfy d >4c, between b and c satisfy 0.75c < b < c.
  2. 2. The circulating water disinfection apparatus as claimed in claim 1, wherein a side of the second baffle plate (44) close to the fourth cavity (424) is further provided with a photocatalytic ozonation reaction apparatus, the photocatalytic ozonation reaction apparatus comprises a second housing (51), a plurality of ultraviolet lamps (52) and a plurality of titanium dioxide films (53), the ultraviolet lamps (52) are sequentially arranged along the width direction of the second housing (51), the titanium dioxide films (53) are sequentially arranged along the length direction of the second housing (51), the titanium dioxide films (53) are arranged at the outer side of the ultraviolet lamps (52), a light source of the ultraviolet lamps (52) is irradiated to the titanium dioxide films (53), and the titanium dioxide films (53) are excited to adsorb ozone molecules to generate active oxygen free radicals, and the generated active oxygen free radicals are used for disinfecting tail water.
  3. 3. The circulating water disinfection apparatus as claimed in claim 1, characterized in that a non-return valve is arranged between the ozone generator (2) and the ejector (3), the flow direction of the non-return valve being from the ozone generator (2) to the ejector (3).
  4. 4. A circulating water disinfection apparatus as claimed in claim 3, wherein a flow meter is provided between said ozone generator (2) and said non-return valve, said flow meter being arranged to measure the flow of ozone delivered by said ozone generator (2) into said jet (3).
  5. 5. The circulating water disinfection apparatus as claimed in claim 1, characterized in that a pressure gauge is installed in the disinfection reactor (4), said pressure gauge being used for monitoring the pressure in the disinfection reactor (4) in real time.
  6. 6. The circulating water disinfection apparatus as claimed in claim 1, wherein said liquid inlet pipe (41) is disposed at the bottommost end of the side wall of said first housing (42), said liquid inlet pipe (41) being used for connecting said ejector (3) and said first cavity (421).
  7. 7. The circulating water disinfection apparatus as claimed in claim 1, wherein a second drain pipe (48) is provided on a side wall of the disinfection reactor (4) corresponding to the side wall connected with the liquid inlet pipe (41), the second drain pipe (48) is provided at the lowest end of the side wall, and the second drain pipe (48) is communicated with the second cavity (422).
  8. 8. The disinfection method of the circulating water disinfection device is characterized by comprising the following steps of: S1, respectively conveying pressurized tail water and ozone into an ejector (3) of the circulating water disinfection device according to any one of claims 1-7, wherein the ozone and the pressurized tail water can be primarily mixed in the ejector (3); s2, conveying the primarily mixed tail water and ozone into the sterilization reactor (4), wherein in the sterilization reactor (4), ozone can sterilize the tail water, meanwhile, overflowed ozone can also flow back to the ozone generator (2) through the gas return pipe (47), and the sterilized tail water is discharged through the drain pipe I (46).
  9. 9. The method for sterilizing a circulating water sterilizing apparatus according to claim 8, wherein said step S2 comprises the step S21 of allowing the ozone and the tail water mixed in said ejector (3) to enter said first chamber (421) through said liquid inlet pipe (41) and allowing the ozone in the tail water entering said first chamber (421) to sterilize the tail water, and allowing the ozone after the tail water treatment to overflow and accumulate in said third chamber (423) in said first chamber (421), the step S22 of allowing the tail water in said first chamber (421) to overflow said first baffle (43) and enter said second chamber (422) when the water in said first chamber (421) is higher than the height of said first baffle (43), the step S23 of allowing the ozone in said second chamber (421) and the tail water in said second chamber (422) to continue to overflow and accumulate in said third chamber (423), the step S23 of allowing the ozone to be mixed in said second chamber (421) and the ozone in said second chamber (423) to continue to flow in said second chamber (422) when the water in said second chamber (423) is higher than the height of said first chamber (43), and the ozone in said second chamber (423) is gradually compressed at the same pressure as said second chamber (423) and the water in said second chamber (44) is higher than the height of said third chamber (44), the liquid level on the right side of the second baffle plate (44) is higher than the liquid level on the left side, the liquid in the fourth chamber (424) is gradually increased along the first pipeline (45) until being discharged from the first drain pipe (46), the right side pressure of the second baffle plate (44) is kept stable at the moment, S25 is filled by gravity and falls back into the third chamber (423) along with the further increase of the pressure of the third chamber (423) until the ozone content in the third chamber (423) exceeds the upper limit which can be accommodated by the third chamber, at the moment, the ozone passes through the second baffle plate (44) under the pressure and sequentially passes through the first pipeline (45) and the gas return pipe (47) along the right side of the second baffle plate (44) to flow back into the ozone generator (2), then the pressure in the third chamber (423) is released, the liquid in the fourth chamber (424) and the first pipeline (45) is filled up by gravity and falls back into the third chamber (423) until the ozone content exceeds the upper limit which can be accommodated by the ozone content, and the sterilizing water is circulated again until the sterilizing device (4) is pressurized, and the sterilizing water is circulated again until the sterilizing device (24) is completed, and the sterilizing step (4) is completed.

Description

Circulating water disinfection device and disinfection method thereof Technical Field The invention relates to the technical field of aquaculture equipment, in particular to a circulating water disinfection device and a disinfection method thereof. Background The facility circulating water culture system is a novel culture mode, and the wastewater generated in a culture pond is treated by a series of water treatment units and then recycled, so that the purpose of improving the utilization rate of water resources and improving the culture environment is achieved. The main principle of the circulating water culture system is that advanced technologies in the subject fields of environmental engineering, civil construction, modern biology, electronics and the like are integrated, so that harmful pollutants such as residual bait, excrement, ammonia nitrogen, nitrite nitrogen and the like in culture water bodies are removed, the aim of purifying the culture environment is fulfilled, and the purified water bodies are re-input into a culture pond by using treatment modes such as physical filtration, biological filtration, carbon dioxide removal, disinfection, oxygenation, desk lamp and the like, so that the problem of low water resource utilization rate can be solved, stable, reliable, comfortable and high-quality living environments can be provided for the culture organisms, and favorable conditions are provided for high-density culture. However, in the existing circulating water culture system, ultraviolet light or ozone is generally adopted for sterilization when the culture tail water is sterilized. When ultraviolet sterilization is adopted, the ultraviolet lamp tube is subjected to long-term dip dyeing by pollutants (such as algae and sticky particles) in tail water, so that the ultraviolet light intensity is reduced, and the sterilization capability is weakened, and secondly, the ultraviolet sterilization kills microorganisms by destroying the nucleic acid function of cells, but when the cells are in a light environment with the wavelength of 300-600 nm (the wavelength of visible light is 390-780 nm), DNA photolytic enzymes of the cells are activated, and damaged DNA can be directly repaired. Therefore, after the tail water flows through the ultraviolet lamp to irradiate and damage pathogenic bacteria and viruses, the pathogenic bacteria and viruses can be repaired by themselves in the later period, so that the ultraviolet sterilization efficiency is low, and the requirements of a circulating water culture system cannot be met. In the prior art, when the tail water is sterilized by ozone, the tail water is sterilized by dissolving the ozone in the tail water, but the method has the defects that for example, the residual ozone in the tail water can have adverse effects on the subsequent treatment process of a circulating aquaculture water system, especially in a nitrification tank for relieving, the residual ozone can cause the concentration of microorganisms in the nitrification tank to be reduced, so that the treatment efficiency of the nitrification tank on the tail water is affected, and part of ozone dissolved in the water can be sent into the air from the water after the tail water is treated by the ozone in the prior art, so that the natural environment is polluted, and the health of operators in the circulating aquaculture system is threatened. Disclosure of Invention The invention provides a circulating water disinfection device, which aims to solve the problem that ozone remained in water after tail water in a circulating water culture system is treated by ozone in the prior art can overflow to air to pollute the environment. In order to achieve the aim, the technical scheme adopted by the invention is that the circulating water sterilizing device comprises a booster water pump, an ozone generator, a jet device and a sterilizing reactor, wherein the booster water pump is connected with the jet device and used for boosting tail water to be treated and then conveying the tail water into the jet device, the ozone generator is connected with the jet device and used for conveying generated ozone to the jet device, and the tail water entering the jet device is mixed with the ozone, and the sterilizing reactor comprises: The liquid inlet pipe is connected with the ejector, the ejector conveys the mixed tail water and ozone into the sterilizing reactor through the liquid inlet pipe, and ozone in the mixed liquid entering the sterilizing reactor can sterilize the tail water; The first shell is provided with a cavity, a first baffle and a second baffle are arranged in the cavity, the second baffle and the first baffle are arranged in the cavity in parallel, and the first baffle is arranged at one side close to the liquid inlet pipe; the first baffle plate integrally extends upwards from the bottom end surface of the cavity and is not contacted with the top end surface of the cavity; the first baffle separates