CN113893715A

CN113893715A - Method for adding ozone/oxygen-enriched solution by adopting dissolved ozone adding system

Info

Publication number: CN113893715A
Application number: CN202111196825.1A
Authority: CN
Inventors: 林峡
Original assignee: Harvey Shanghai Environmental Technology Co ltd
Current assignee: Harvey Shanghai Environmental Technology Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-01-07

Abstract

The invention discloses a method for adding ozone/oxygen-enriched solution by adopting a dissolved ozone adding system. The method comprises the steps that 1) an ozone/oxygen-enriched solution adding system is established, wherein the ozone/oxygen-enriched solution adding system comprises a reaction tank, a diffuser, a pressure regulating valve group and a water pump; a water mist nozzle and an ozone/oxygen nozzle are arranged on the top of the tank in the reaction tank; a control valve is arranged between the reaction tank and the diffuser; the cylindrical side wall of the diffuser is provided with a channel for releasing the oxygen-enriched solution, namely a small hole or a narrow gap or a combination of the small hole and the narrow gap, which can generate certain back pressure to ensure that the pressure difference between the outlet pressure of the diffuser and the water pressure to be treated is more than 2 bar; 2) the ozone/oxygen is sent into a reaction tank after being regulated in pressure; 3) the dissolved water is pressurized by a water pump and then is sent into a reaction tank in a high-pressure mist form from the top of the tank; 4) and a water quality on-line detector is arranged at the water outlet and is connected with the PLC controller through a signal receiver to control the size of the control valve. The method can accurately regulate water quality, improve ozone solubility and greatly improve ozone/oxygen utilization rate.

Description

Method for adding ozone/oxygen-enriched solution by adopting dissolved ozone adding system

Technical Field

The invention belongs to the technical field of water treatment, and relates to a method for adding ozone/oxygen-enriched solution by adopting a dissolved ozone adding system. The method for adding the ozone/oxygen-enriched solution by adopting the dissolved ozone adding system is suitable for a disinfection process in water treatment.

Background

Ozone is a broad-spectrum disinfectant, and a jet aerator mixing method, a mixing tower ozone adding method, an ozone aeration mixing adding method and a mixing pump ozone adding method for adding ozone are generally adopted. These approaches all suffer from the following disadvantages:

the ejector forms a low-pressure area in the Venturi nozzle by utilizing water flow, ozone/oxygen is sucked and mixed by pressure difference, and then mixed liquid with bubbles is injected into water to be treated. Although the adding method is superior to an aeration method due to the escape of bubbles in water, the use rate of gas is lower than 45 percent.

Mixing tower ozone dosing method, generally, water is injected into the tower in the form of water drops/fog, then ozone/oxygen and water are mixed and naturally mixed with water in the form of bubbles to form a mixed solution, and the mixed solution is thrown into the water to be treated, so that the ozone/oxygen bubbles can not be prevented from escaping from the water, and the ozone concentration in the water is reduced.

The ozone adding installation method of the mixing pump generally adopts a vortex pump, negative pressure is formed in the pump, a gas suction port sucks gas, and gas-liquid mixing can be carried out through the stirring of a plurality of impellers. The efficiency of dissolving ozone by adopting a mixing pump is higher and is generally lower than 70 percent. However, the gas-liquid ratio is too critical in the specified range, and is not suitable for matching with a large ozone generator.

Above throwing the mode, no matter which kind of mode of throwing, the result all is to throw the gas-liquid mixture to aquatic, because water is in the low pressure, when mixed liquid meets with water, gas in the mixed liquid is separated out from mixed liquid with the bubble form to reduce the concentration of ozone liquid, and then reduce disinfection effect or need consume a large amount of ozone/oxygen and the energy in order to guarantee disinfection effect.

The solubility of ozone in water depends on the temperature and pressure of water, and accords with Henry's law, the lower the water temperature, the higher the solubility, the higher the pressure, the higher the solubility, the maintenance of the concentration of ozone is an important factor influencing the disinfection effect, the control of the water temperature needs to consume a large amount of energy, and the method is not suitable for being applied to the use scene of large water volume, and the adding method for generating supersaturated solution through the pressure increase and control is a more economical and feasible method.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a method for adding ozone/oxygen-enriched solution by adopting a dissolved ozone adding system, which can greatly improve the utilization rate of ozone/oxygen.

The technical concept of the invention is as follows: sending ozone/oxygen at a certain pressure and dissolved water at a certain pressure into a reaction tank, mixing the water and the water in the tank according to a certain proportion, and generating a high-concentration ozone/oxygen-enriched solution under the action of pressure in the tank; then the saturated high-concentration ozone/oxygen-enriched solution is sealed between the reaction tank and the control valve through a control valve, so that the saturated high-concentration ozone/oxygen-enriched solution is changed into a supersaturated high-concentration ozone/oxygen-enriched solution; and finally, reversely injecting the supersaturated high-concentration ozone/oxygen-enriched solution into the water to be treated through the diffuser, so that the high-concentration ozone/oxygen-enriched solution is instantly blended with the water, the concentration of the dissolved ozone in the water body is increased, meanwhile, the generation of bubbles can be greatly reduced, the utilization rate of oxygen is greatly improved, and redundant ozone returns to the reaction tank through the discharge pipe.

The purpose of the invention is realized by the following technical scheme:

the invention relates to a method for adding ozone/oxygen-enriched solution by adopting a dissolved ozone adding system, which comprises the following steps:

(1) establishing a high-concentration ozone/oxygen-enriched solution adding system; the high-concentration ozone/oxygen-enriched solution adding system comprises a reaction tank, a diffuser, an ozone/oxygen pipeline and a mixed water pipeline; a water mist nozzle and an ozone/oxygen nozzle are arranged on the top of the tank in the reaction tank; a water pump is arranged on the mixed water pipeline; the outlet of the water pump is connected with the water inlet and the water mist nozzle on the top of the reaction tank through a mixed water pipeline; the ozone/oxygen pipeline is provided with a pressure regulating valve group; the outlet of the pressure regulating valve group is connected with an ozone/oxygen inlet and an ozone/oxygen nozzle on the top of the reaction tank through an ozone/oxygen pipeline; the outlet at the bottom of the reaction tank is connected with the inlet of the diffuser; a control valve capable of accurately controlling flow and pressure is arranged on a high-concentration ozone/oxygen-enriched solution pipeline between an outlet at the bottom of the reaction tank and an inlet of the diffuser; the diffuser is arranged in the water to be treated; the diffuser is a hollow cylindrical object with one open end and the other closed end; a channel for releasing ozone/oxygen-enriched solution is arranged on the cylindrical side wall of the diffuser; the channel for releasing the ozone/oxygen-enriched solution is a small hole or a narrow gap, or the combination of the small hole and the narrow gap; the channel for releasing the ozone/oxygen-enriched solution can generate a certain back pressure and enables the supersaturated oxygen-enriched solution to be sprayed into the water to be treated at a certain outlet pressure, so that the pressure difference between the outlet pressure of the diffuser and the pressure of the water to be treated is ensured to be more than 2 bar; the ozone/oxygen-enriched solution is a high-concentration ozone/oxygen-enriched solution;

the diffuser is arranged in raw water or a water pipeline which flows by water to be treated and is positioned at the upstream of the water flow, and a channel for releasing ozone/oxygen-enriched solution is arranged on one half side wall of the diffuser; the number of the channels for releasing the ozone/oxygen-enriched solution is one or more, or one or more rows; the diffuser is inserted into the raw water or water pipeline in a direction perpendicular to the water flow direction, one side of the diffuser, which is provided with a channel for releasing the ozone/oxygen-enriched solution, is right opposite to the upstream of the water flow, so that the oxygen-enriched solution in the diffuser can be reversely ejected from the channel for releasing the ozone/oxygen-enriched solution opposite to the water flow and can generate a vortex reinforced mixing effect;

or the diffuser is arranged in a pool, a pond or a sewage tank to be treated without water flowing, and a plurality of or a plurality of rows of channels for releasing ozone/oxygen-enriched solution are arranged on the side walls at two sides of the diffuser or on the whole cylindrical side wall;

(2) the ozone/oxygen is adjusted to a certain pressure by a pressure regulating valve group and is conveyed to the reaction tank by a pipeline;

(3) ozone/oxygen with certain pressure (more than 2 bar) enters the tank top of the reaction tank through an ozone/oxygen pipeline, and meanwhile, the dissolved water (oxygen-enriched water which is treated by an ozone adding process and then filtered to remove impurities) is pressurized to certain pressure through a water pump and then is sent into the reaction tank from the tank top in a high-pressure mist form through a dissolved water pipeline, and the pressure in the tank is kept at certain pressure; mixing ozone/oxygen with pressurized water in a reaction tank to form a gas-liquid mixture with a certain pressure; the contact area of the water mist and the ozone/oxygen is large, the pressure in the tank is increased to a certain pressure, and the ozone/oxygen is quickly dissolved in the water to generate a high-concentration ozone/oxygen-enriched solution; the pressure in the tank is continuously increased along with the continuous feeding of ozone/oxygen or the continuous feeding of water mist with certain pressure into the tank, and when the pressure in the reaction tank reaches certain pressure (more than 2 bar), the high-concentration ozone/oxygen-enriched solution in the tank is converted into saturated high-concentration ozone/oxygen-enriched solution; the saturated high-concentration ozone/oxygen-enriched solution is pumped to a control valve capable of accurately controlling the flow and the pressure through a pipeline at the bottom of the reaction tank, the saturated high-concentration ozone/oxygen-enriched solution is sealed between the reaction tank and the control valve by the control valve, and the saturated high-concentration ozone/oxygen-enriched solution becomes supersaturated high-concentration ozone/oxygen-enriched solution due to the continuous pressure in the reaction tank; opening the control valve, the supersaturated high-concentration ozone/oxygen-enriched solution passes through the valve core in the control valve and is conveyed to the diffuser through a pipeline, a mixed solution of the high-concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen microbubbles is formed by a channel (namely a small hole and/or a gap) which is designed on the diffuser and used for releasing the ozone/oxygen-enriched solution and is reversely sprayed into the water to be treated, the high-concentration ozone/oxygen-enriched solution is rapidly dissolved with water (meets with a disinfected substance in the water and starts to be disinfected), and the small amount of ozone/oxygen microbubbles is absorbed by the water flow while the dissolved ozone/dissolved oxygen is added (the dissolved ozone/dissolved oxygen in the water is increased),

(4) a water quality online detector (a water quality instrument probe and the like) is arranged at the downstream of water flow in a raw water or water pipeline or at the water outlet of a pool, a pond or a sewage tank, the water quality online detector is connected with a signal receiver, and the signal receiver is connected with the input end of a PLC (programmable logic controller); the output end of the PLC is connected with the control valve; the water quality on-line detector transmits signals to the signal receiver in real time, and the signals received by the signal receiver are processed by the PLC and then control the opening size of the control valve so as to control the input amount of the high-concentration ozone/oxygen-enriched solution, thereby meeting the water quality requirement which a user wants to control.

Furthermore, the inlet of the mixed water pipeline is connected with the oxygen-enriched water after the water to be treated is added with the ozone solution (namely, the oxygen-enriched water after being treated by the ozone solution adding system and the adding process is used as water for a water pump, namely, the mixed water), namely: the water outlet at the lower part of the water dissolving pipeline or the raw water flowing with water to be treated is connected with the inlet of the water pump through the water dissolving pipeline; or the water outlet of the pool, the pond or the sewage tank to be treated, which has no water flow, is connected with the inlet of the water pump through the mixed water pipeline. That is, the excess ozone/oxygen is returned to the reaction tank after passing through the discharge pipe and neutralization treatment.

The filtered water treated by the high-concentration ozone/oxygen-enriched feeding process is used as water for a water pump, namely, water for dissolving. Such as: the client of the sewage plant can use the filtered water after being treated and disinfected by the high-concentration ozone/oxygen-enriched adding process as water for the water pump; the filtered water treated and disinfected by the high-concentration ozone/oxygen-enriched feeding process can be used as water for a water pump in a water plant; the water treated and disinfected by the high-concentration ozone/oxygen-enriched dosing process can be used as water for a water pump in a natural water body after being subjected to sand filtration.

Further, the high-concentration ozone/oxygen-enriched solution adding system also comprises a liquid oxygen storage tank, an electronic vaporizer or a heat exchanger and an ozone generator which are connected in sequence; or, also comprises an air separation device and an ozone generator which are connected in sequence; or, also comprises a Dewar flask or a steel cylinder, and an ozone generator which are connected in sequence; the outlet of the ozone generator is connected with the inlet of the ozone/oxygen pipeline; and a pressure regulating valve group is arranged on an ozone/oxygen pipeline connecting the outlet of the ozone generator and the gas inlet of the tank top of the reaction tank.

Further, in the step (2), high-pressure low-temperature liquid oxygen is stored in the liquid oxygen storage tank, the liquid oxygen is discharged from the bottom of the liquid oxygen storage tank and is conveyed to the electronic vaporizer or the heat exchanger, and the electronic vaporizer or the heat exchanger continuously and quantitatively heats and gasifies the liquid oxygen into gaseous oxygen; or, oxygen is generated by an air separation plant; alternatively, the oxygen is stored in a dewar or cylinder, from which it is released; oxygen is delivered to the ozone generator through a pipeline to generate ozone and oxygen (the oxygen is ionized by the ozone generator to generate about 6-10% of ozone and 90-94% of oxygen); the ozone/oxygen is conveyed to the pressure regulating valve group through a pipeline to be regulated to the pressure above 2bar, and then conveyed to the reaction tank through a pipeline.

Further, in the step (3), ozone/oxygen with a pressure of more than 2bar enters the top of the reaction tank through an ozone/oxygen pipeline, and meanwhile, the dissolved water (the oxygen-enriched effluent which is treated by the ozone adding process and then filtered to remove impurities) is pressurized to more than 2bar through a water pump and then is sent into the reaction tank from the top of the tank in a high-pressure mist form through a dissolved water pipeline, and the pressure in the tank is kept to be more than 2 bar. The gasified ozone/oxygen with the pressure of more than 2bar and the pressurized dissolved water pressurized to the pressure of more than 2bar by a water pump form a gas-water mixture at the top of the reaction tank; the gas-water mixture gradually forms saturated high-concentration ozone/oxygen-enriched solution in the reaction tank; the saturated high-concentration ozone/oxygen-enriched solution passes through a control valve which is arranged on a high-concentration ozone/oxygen-enriched solution pipeline between the reaction tank and the diffuser and can accurately control the flow and the pressure to form a supersaturated high-concentration ozone/oxygen-enriched solution; the supersaturated high concentration ozone/oxygen-enriched solution is reversely sprayed into the water at the upstream of the raw water flow or the water in the water inlet tank through the passages for releasing the ozone/oxygen-enriched solution on the diffuser.

Furthermore, when the diffuser is arranged in raw water or a water pipeline which flows water to be treated, the diffuser is a hollow long cylindrical object with one half of the cross section being a polygon and the other half being an arc, and one end of the hollow long cylindrical object is closed, and a plurality of channels for releasing ozone/oxygen-enriched solution are arranged on the side wall of one half of one side of the polygon of the diffuser; the channel for releasing the ozone/oxygen-enriched solution is one or more rows of small holes, one or more rows of narrow gaps, or a combination of one or more rows of small holes and one or more rows of narrow gaps (namely a combination of the small holes and the narrow gaps); or may be one or more apertures, one or more narrow slits, or a combination of one or more apertures and one or more narrow slits (i.e., a combination of both apertures and narrow slits); the diffuser is inserted into the raw water in a direction perpendicular to the water flow, and the side of the diffuser with the small holes and/or the narrow gaps is opposite to the upstream of the water flow, so that the oxygen-enriched solution in the diffuser can be reversely sprayed out of the water flow from the small holes and/or the narrow gaps.

When the diffuser is arranged in a pool, a pond or a sewage tank which is to be treated and does not flow water, the diffuser which can realize 360-degree throwing can be designed into a hollow cylinder shape, and can also be designed into a hollow square cylinder shape with a polygonal (such as square, hexagon and the like) section on the premise of ensuring back pressure.

Furthermore, the holes and/or slits in each row are located on the same vertical line and are uniformly arranged.

Furthermore, a plurality of channels for releasing the ozone/oxygen-enriched solution on the same horizontal plane are uniformly arranged at a central included angle of less than 180 degrees; two adjacent channels for releasing the ozone/oxygen-enriched solution on the same horizontal plane are arranged at an acute central included angle to ensure that the oxygen-enriched solution is ejected towards the water flow direction to be mixed with the water to be treated at a certain outlet pressure (more than 3bar) and can generate a vortex reinforced mixing effect.

Further, the small holes are designed for small-diameter pipes below DN25, that is, when the high-concentration oxygen-enriched solution pipe is a small-diameter pipe below DN25, the channel for releasing the ozone/oxygen-enriched solution is one or more rows of small holes, or a combination of one or more rows of small holes and one or more rows of narrow gaps; or one or more apertures, or a combination of one or more apertures and one or more narrow slits; the narrow gaps are more suitable for large-diameter pipelines larger than DN25, namely, when the high-concentration oxygen-enriched solution pipeline is a large-diameter pipeline larger than DN25, the channel for releasing the ozone/oxygen-enriched solution is one or more rows of narrow gaps, or a combination of one or more rows of small holes and one or more rows of narrow gaps; or one or more narrow slits, or a combination of one or more apertures and one or more narrow slits.

Further, the volume ratio of the ozone/oxygen with the pressure of more than 2bar to the dissolved water (the oxygen-enriched water after being treated by the ozone adding process and filtered to remove impurities) is not less than 1: 10.

the working principle of the method for adding the ozone/oxygen-enriched solution by adopting the dissolved ozone adding system is as follows: the high-pressure low-temperature liquid oxygen is stored in a liquid oxygen storage tank, the liquid oxygen comes out from the bottom of the liquid oxygen storage tank and is conveyed to an electronic vaporizer or a heat exchanger, and the liquid oxygen is converted into the oxygen in a continuous and quantitative mode; alternatively, oxygen is stored in a dewar or cylinder from which it is released; the oxygen passes through an ozone generator to generate ozone and oxygen; the pressure is adjusted to be more than 2bar through a pressure adjusting valve group; ozone/oxygen having a pressure of 2bar or more is fed into the reaction tank from the top of the tank through an ozone/oxygen pipe, and the air in the tank is discharged; meanwhile, the dissolved water (the oxygen-enriched water which is treated by the ozone adding process and then filtered to remove impurities) is pressurized to more than 2bar by a water pump, then is sent into the reaction tank in a high-pressure mist form from the top of the tank through a dissolved water pipeline, and the pressure in the tank is kept to be more than 2 bar; mixing ozone/oxygen with pressurized water in a reaction tank to form a gas-liquid mixture with a certain pressure; because the contact area of the water mist and the ozone/oxygen is large, and the pressure in the tank is increased to a set pressure environment, the ozone/oxygen is quickly dissolved in the water and a high-concentration ozone/oxygen-enriched solution is generated; along with the continuous feeding of ozone/oxygen or along with the continuous entering of water mist with certain pressure into the tank, the pressure in the tank is raised to a set pressure, and when the pressure in the reaction tank continuously reaches more than 2bar, the high-concentration ozone/oxygen-enriched solution in the tank is converted into a saturated high-concentration ozone/oxygen-enriched solution; the saturated high-concentration ozone/oxygen-enriched solution is pumped to a control valve capable of accurately controlling the flow and the pressure through a pipeline at the bottom of the reaction tank, the saturated high-concentration ozone/oxygen-enriched solution is sealed between the reaction tank and the control valve by the control valve, and the saturated high-concentration ozone/oxygen-enriched solution becomes supersaturated high-concentration ozone/oxygen-enriched solution due to the continuous pressure in the reaction tank; opening the control valve, supersaturated high concentration ozone/oxygen-enriched solution passes through the case in the control valve to carry the diffuser through the pipeline, form the mixed solution of high concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen microbubble through the orifice and/or gap of the passageway that releases ozone/oxygen-enriched solution that is designed on the diffuser and be reverse injection to aquatic, high concentration ozone/oxygen-enriched solution is fast with water-soluble (meet with the material of being disinfected in aquatic and begin to disinfect), when throwing dissolved ozone/dissolved oxygen (increase the dissolved ozone/dissolved oxygen volume in aquatic), a small amount of ozone/oxygen microbubble is absorbed by rivers. The water quality probe is arranged in water to be treated (the downstream of water flow in a raw water or water pipeline or the water outlet of a pool, a pond or a sewage tank) and transmits signals to the signal receiver on the control valve in real time, and the signals received by the signal receiver are processed by the PLC to control the opening size of the control valve so as to control the feeding amount of the high-concentration ozone/oxygen-enriched solution, thereby achieving the dissolved ozone amount desired to be controlled by a user.

A liquid level meter for outputting signals is arranged outside the tank body of the reaction tank, and the liquid level signals of the high-concentration ozone/oxygen-enriched solution in the tank control a water pump and a switch for injecting ozone/oxygen through a PLC processor. When the liquid level drops, the PLC processor controls the switch of the water pump and the ozone/oxygen injection to be switched on, and high-concentration ozone/oxygen-enriched solution is generated to supplement the amount of the high-concentration ozone/oxygen-enriched solution consumed by throwing the ozone/oxygen-enriched solution into water.

Ozone/oxygen having a pressure of 2bar or more is dissolved in the water mist and an ozone/oxygen-rich solution is produced during the rise of the pressure and a supersaturated ozone/oxygen-rich solution is formed before the water to be treated is fed.

The pressure of the ozone/oxygen is adjusted to be more than 2bar by gasification, the pressure of the dissolved water is increased to be more than 2bar by a water pump, the ozone/oxygen and the dissolved water are mixed in a reaction tank and generate high-concentration ozone/oxygen-enriched solution under the pressure condition. The saturated high-concentration ozone/oxygen-enriched solution can be further converted into the supersaturated high-concentration ozone/oxygen-enriched solution only by keeping the pressure of the system to be more than 2bar, otherwise, the utilization rate of oxygen is influenced by more than 99 percent. When the high concentration ozone/oxygen-enriched solution passes through the small holes and the gaps, a small amount of ozone/oxygen overflows from the solution in the form of bubbles due to pressure drop, so that the utilization rate of the whole oxygen is more than 99%.

Ozone/oxygen solubility is temperature, pressure dependent: under the same pressure condition, the lower the temperature is, the higher the solubility is; under the same temperature condition, the higher the pressure is, the higher the solubility is; therefore, the generation of carbonic acid can be enhanced or accelerated by lowering the water temperature and increasing the pressure in the tank. The parameters of the water pump and the amount of ozone/oxygen can be selected according to the conditions of each usage scenario, such as water temperature, water pressure, water quality parameters of raw water (water to be treated), stable dissolved ozone amount value desired by a user, and the position of a high-concentration ozone/oxygen-enriched solution feeding point.

The method of lowering the water temperature and raising the pressure in the tank can enhance or accelerate the generation of the ozone/oxygen-enriched solution, for example, the water cooling system … added in the system can be provided with a cooling liquid coil in the reaction tank, or the middle lower part of the reaction tank is provided with a supplementary cooling water pipe.

The water is mixed with ozone/oxygen in the form of mist, so as to increase the contact area and accelerate the mixing to generate ozone/oxygen-enriched solution, and the size of the water mist and mist mixture is reduced by utilizing the principle, such as nano-scale and the like. Therefore, the water mist nozzle at the top of the reaction tank can adopt an industrial acoustic nano-scale atomizer.

The invention has the beneficial effects that:

the invention provides a method for adding ozone/oxygen-enriched solution by adopting a dissolved ozone adding system, which comprises the steps of feeding ozone/oxygen and dissolved water (oxygen-enriched water which is treated by the ozone adding process and then filtered to remove impurities) into a reaction tank to prepare supersaturated high-concentration ozone/oxygen-enriched solution in advance, then adding the high-concentration ozone/oxygen-enriched solution into water through a diffuser, rapidly mixing the high-concentration ozone/oxygen-enriched solution with water, and adding dissolved ozone/dissolved oxygen while absorbing a small amount of ozone/oxygen microbubbles by water flow.

Compared with the prior art, the method for adding the ozone/oxygen-enriched solution by adopting the dissolved ozone adding system has the following advantages that:

1) in the invention, certain-pressure ozone/oxygen and certain-pressure dissolved water (oxygen-enriched water which is treated by the ozone adding process and then filtered to remove impurities) are fed into a reaction tank to be mixed in a certain proportion in the tank, and high-concentration ozone/oxygen-enriched solution is generated under the action of the pressure in the tank; then the saturated high-concentration ozone/oxygen-enriched solution is sealed between the reaction tank and the control valve through a control valve, so that the saturated high-concentration ozone/oxygen-enriched solution is changed into a supersaturated high-concentration ozone/oxygen-enriched solution; and finally, reversely injecting the supersaturated high-concentration ozone/oxygen-enriched solution into the water to be treated through the diffuser, rapidly dissolving the high-concentration ozone/oxygen-enriched solution with water, and adding a small amount of ozone/oxygen microbubbles to be absorbed by water flow while dissolving ozone/dissolved oxygen, so that the generation of bubbles is greatly reduced, the utilization rate of oxygen can be greatly improved, and the dissolved ozone amount can be accurately controlled.

2) The supersaturated high-concentration ozone/oxygen-enriched solution is fed into water through the diffuser, and because the pressure of the water is in a low-pressure state, in order to prevent ozone/oxygen bubbles in the mixed solution from largely escaping in pressure drop, the invention designs the diffuser, and the diffuser has the functions of stabilizing the pressure of the system, maintaining the back pressure of the system and injecting the high-concentration ozone/oxygen-enriched solution into the raw water. The supersaturated high-concentration ozone/oxygen-enriched solution is sprayed out through the small holes of the diffuser, and the high-concentration ozone/oxygen-enriched solution is quickly dissolved with water. Because of the pressure drop, a small amount of ozone/oxygen bubbles escape from the high-concentration ozone/oxygen-enriched solution, so the small amount of ozone/oxygen bubbles and the high-concentration ozone/oxygen-enriched solution are ejected together to generate a strong vortex with water, and the fusion time is accelerated. The application test case proves that the gas-water mixture or the mixed solution is converted into the supersaturated high-concentration ozone/oxygen-enriched solution, the high-concentration ozone/oxygen-enriched solution and water are both liquid, the solution-liquid combination is completed instantly, and the water quality of the water body can be accurately and stably controlled. Compared with other adding modes of ozone/oxygen, the oxygen utilization rate is high, and the use cost of a user is greatly reduced.

3) In the prior art, ozone/oxygen dosing is used, an aerator or venturi mixer is a means for projecting gas into the water, the gas and water being mixed at the converging section or throat of the venturi nozzle and then ejected through the diverging section. The injection speed of the solution is increased, the pressure is rapidly reduced, a large amount of ozone/oxygen is separated out from the solution to form large bubbles, and only a small part of ozone/oxygen is dissolved with water. Ozone/oxygen bubbles escape from the water in open environments such as shallow ponds, pools and the like due to different pressures at different heights in the water; ozone/oxygen bubbles can collapse in the tubing, causing vibration and cavitation, and affecting the accuracy of the dissolved ozone amount.

The diffuser has the main functions of stabilizing the pressure of the whole system to be more than 2bar by utilizing the small holes and/or the gaps, always sealing the ozone/oxygen in the supersaturated high-concentration ozone/oxygen-enriched solution, and generating the stable high-concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen bubbles when the pressure is released. A channel for releasing the ozone/oxygen-enriched solution is arranged on one half side wall of the diffuser, and the channel for releasing the ozone/oxygen-enriched solution is a row or a plurality of rows of small holes, a row or a plurality of rows of gaps, or the combination of the small holes and/or the gaps; a plurality of channels for releasing the ozone/oxygen-enriched solution on the same horizontal plane are uniformly arranged at a central included angle of less than 180 degrees; two adjacent channels for releasing the ozone/oxygen-enriched solution on the same horizontal plane are arranged in an acute central included angle manner so as to ensure that the outlet pressure of the high-concentration ozone/oxygen-enriched solution is more than 2bar and the high-concentration ozone/oxygen-enriched solution is jetted and mixed with water to be treated. The inlet pressure and outlet pressure (ideal) of the pressurized mixture are made to coincide through the small holes and/or slits and are injected into the water at a very rapid rate. Because of the pressure drop, the pressure difference can cause part of ozone/oxygen to escape from the solution in the form of micro-bubbles, therefore, the mixed solution of high-concentration ozone/oxygen-enriched solution and micro-bubbles is sprayed together to mix with water, meanwhile, because the small holes and/or gaps on each row are positioned on the same vertical line and are uniformly arranged, the pressure difference between the side with holes and the side without holes of the diffuser, the pressure mixed solution forms vortex in the water, and the mixing is further accelerated.

In the invention, the diffuser used for spraying the high-concentration oxygen-enriched solution is combined with the narrow gap and the small hole or is used independently, and the small hole or the combination of the narrow gap and the small hole is designed for a small-diameter pipeline below DN 25; the narrow gap or the combination of the narrow gap and the small hole is more suitable for a large-caliber pipeline which is larger than DN 25; the solution ejected through the narrow gap has a larger contact surface with water than if only small holes were used; depending on the use scenario, a combination of small holes and/or narrow slits may also be used. The liquid flows through the pores and is a contraction and re-diffusion process, the liquid state is turbulent flow, great pressure loss is generated, and more pores cause more oxygen to be separated out. The state when the liquid passes through a narrow gap and the pressure is below 10bar is laminar, in contrast to small pores, where the evolution of oxygen is much less than small pores. However, in some cases, a combination of small holes and narrow gaps is required, so that a small amount of oxygen is lost, a certain turbulent flow is formed, and the mixing effect with raw water is enhanced. Compared with the small hole, the narrow gap can also solve the problem that the small hole deforms due to cavitation erosion and influences the ejection flow and pressure of the solution when the system is used.

Compared with an aeration head, a Venturi mixer, a mixing tank and a gas-liquid pump in the prior art, the high-concentration ozone/oxygen-enriched solution diffuser solves the problems of low oxygen utilization rate (dissolution rate), noise, vibration, cavitation and the like; meanwhile, the application scene range of the high-concentration ozone/oxygen-enriched solution is wider, and the method can be applied to natural lakes, shallow channels, shallow pools, pipelines, liquid storage tanks and the like.

4) The invention solves the problem that ozone/oxygen is easy to separate out from liquid when gas and water with different pressures are mixed; the conversion of the gas-water mixture into a supersaturated high concentration ozone/oxygen-enriched solution requires pressure and time, and the design of the reaction tank solves these problems, and the high concentration ozone/oxygen-enriched solution remains stable in a closed pressure environment.

Drawings

FIG. 1 is a schematic diagram showing the overall configuration of a high concentration ozone/oxygen-rich solution adding system in example 1 of the present invention;

FIG. 2 is a schematic diagram showing the overall configuration of a high concentration ozone/oxygen-rich solution feeding system in example 2 of the present invention;

FIG. 3 is a sectional top view of the diffuser 6 of the present invention;

FIG. 4 is a front view of the diffuser 6 according to the present invention;

fig. 5 is a side view of the diffuser 6 according to the present invention.

In the figure: 1. liquid oxygen storage tank 2, electronic vaporizer/heat exchanger 3, ozone generator 4, water pump 5, reaction tank 6, diffuser 7, water quality instrument probe 8, gap 9, small hole 10, pressure regulating valve group 11, mixed water pipeline 12, ozone/oxygen pipeline 13, ozone/oxygen injection switch 14, control valve 15, high-concentration ozone/oxygen-enriched solution pipeline A, central included angle B and central included angle

Detailed Description

The invention is further described below with reference to the following figures and examples.

Example 1

The embodiment of the invention provides a method for adding ozone/oxygen-enriched solution by adopting a dissolved ozone adding system, which comprises the following steps:

(1) establishing a high-concentration ozone/oxygen-enriched solution adding system; as shown in fig. 1, the high concentration ozone/oxygen-enriched solution adding system comprises a liquid oxygen storage tank 1, an electronic vaporizer 2, an ozone generator 3, a reaction tank 5 and a diffuser 6 which are connected in sequence, and further comprises a water pump 4 connected with a water inlet at the top of the reaction tank 5 through a mixed water pipeline 11; an ozone/oxygen pipeline 12 connecting the outlet of the ozone generator 3 and the gas inlet on the top of the reaction tank 5 is provided with a pressure regulating valve group 10; a small section of each of the mixed water pipeline 11 and the ozone/oxygen pipeline 12 extends into the reaction tank 5; a water spray nozzle (connected with a mixed water pipeline 11) and an ozone/oxygen nozzle (connected with an ozone/oxygen pipeline 12) are arranged on the top of the inner tank of the reaction tank 5; the outlet at the bottom of the reaction tank 5 is connected with the inlet of the diffuser 6; a control valve 14 capable of accurately controlling the flow and the pressure is arranged on a high-concentration ozone/oxygen-enriched solution pipeline 15 between an outlet at the bottom of the reaction tank 5 and an inlet of the diffuser 6; the diffuser 6 is arranged in the water pipe through which water flows to be treated, is positioned upstream of the water flow, and is inserted into the water pipe perpendicularly to the water flow direction; a plurality of channels for releasing ozone/oxygen-enriched solution are arranged on the side wall of one half of the diffuser 6, the channels for releasing ozone/oxygen-enriched solution can generate backpressure of more than 3bar and enable supersaturated oxygen-enriched solution to be sprayed into water to be treated (water at the upstream of water flow in the water inlet pipeline is reversely sprayed) at the outlet pressure of more than 3bar, and the pressure difference of more than 2bar is ensured between the outlet pressure of the diffuser and the pressure of the water to be treated; the downstream water outlet of the water pipeline flowing with water to be treated is connected with the inlet of the water pump 4 through a mixed water pipeline 11 (the oxygen-enriched outlet water treated by the ozone solution adding system and the adding process of the invention is used as the water used by the water pump 4, namely the reaction water);

ozone/oxygen with pressure of more than 2bar and pressurized dissolved water pressurized to the pressure of more than 2bar by a water pump 4 form a gas-water mixture at the top of a reaction tank 5; the gas-water mixture gradually forms a saturated high-concentration ozone/oxygen-enriched solution in the reaction tank 5; the saturated high-concentration ozone/oxygen-enriched solution passes through a control valve 14 which is arranged on a high-concentration ozone/oxygen-enriched solution pipeline 15 between the reaction tank 5 and the diffuser 6 and can accurately control the flow and the pressure to form a supersaturated high-concentration ozone/oxygen-enriched solution; the supersaturated high-concentration ozone/oxygen-enriched solution reversely sprays into the water at the upstream of the water flow in the water inlet pipeline through a channel for releasing the ozone/oxygen-enriched solution on the diffuser 6;

(2) storing high-pressure low-temperature liquid oxygen in a liquid oxygen storage tank 1; liquid oxygen is discharged from the bottom of the liquid oxygen storage tank 1 and is conveyed to the electronic vaporizer/heat exchanger 2, and the electronic vaporizer/heat exchanger 2 continuously and quantitatively converts the liquid oxygen into oxygen; the oxygen gas is then used to generate ozone and oxygen gas by the ozone generator 3 (the oxygen gas is ionized by the ozone generator 3 to generate about 6-10% of ozone and 90-94% of oxygen gas); the ozone/oxygen is conveyed to a pressure regulating valve group 10 through a pipeline to regulate the pressure to be more than 2bar, and then conveyed to a reaction tank 5 through a pipeline;

(3) ozone/oxygen with pressure of more than 2bar enters the tank top of a reaction tank 5 (is sprayed out from an ozone/oxygen nozzle) through an ozone/oxygen pipeline 12, meanwhile, dissolved water (oxygen-enriched water which is treated by the ozone adding process and then filtered to remove impurities) is pressurized to more than 2bar through a water pump 4 and then is sent into the reaction tank 5 from the tank top (entering from a tank top water inlet and sprayed out from a water mist nozzle on the tank top) in a high-pressure mist form through a dissolved water pipeline 11, and the pressure in the tank is kept to be more than 2 bar; in the reaction tank 5, the ozone/oxygen is mixed with pressurized dissolved water to form a gas-liquid mixture with a certain pressure; because the contact area of the water mist and the ozone/oxygen is large, and the pressure in the tank is increased to a set pressure environment, the ozone/oxygen is quickly dissolved in the water and a high-concentration ozone/oxygen-enriched solution is generated; with the continuous feeding of ozone/oxygen, when the pressure in the reaction tank 5 reaches more than 2bar, the high-concentration ozone/oxygen-enriched solution in the tank is converted into a saturated high-concentration ozone/oxygen-enriched solution; the saturated high-concentration ozone/oxygen-enriched solution is pumped to a control valve 14 capable of accurately controlling flow and pressure through a pipeline at the bottom of the reaction tank 5, the control valve 14 seals the saturated high-concentration ozone/oxygen-enriched solution between the reaction tank 5 and the control valve 14, and the saturated high-concentration ozone/oxygen-enriched solution becomes supersaturated high-concentration ozone/oxygen-enriched solution due to the continuous pressure in the reaction tank 5; opening the control valve 14, the supersaturated high-concentration ozone/oxygen-enriched solution is conveyed to the diffuser 6 through a valve core in the control valve 14 and a pipeline, a mixed solution of the high-concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen microbubbles is formed by a channel (namely a small hole 9 and/or a gap 8) designed on the diffuser 6 and used for releasing the ozone/oxygen-enriched solution, and is reversely sprayed into the water to be treated (raw water), the high-concentration ozone/oxygen-enriched solution is rapidly mixed with water, and the small amount of ozone/oxygen microbubbles is absorbed by water flow while the dissolved ozone/dissolved oxygen is put in; the generation of bubbles is greatly reduced, the utilization rate of oxygen is greatly improved, and the dissolved ozone amount is accurately controlled.

(4) A water quality instrument probe 7 is arranged at the downstream of water flow in the water pipeline, the water quality instrument probe 7 is connected with a signal receiver, and the signal receiver is connected with the input end of the PLC; the output end of the PLC is connected with the control valve 14; the probe of the water quality instrument transmits a signal to the signal receiver in real time, and the signal received by the signal receiver is processed by the PLC and then controls the opening size of the control valve 14 so as to control the input amount of the high-concentration ozone/oxygen-enriched solution, thereby achieving the dissolved ozone amount which is expected to be controlled by a user.

As shown in fig. 3-5, the diffuser 6 is a hollow long cylindrical object with one half of the cross section being a polygon and the other half being a circular arc, and one end of the hollow long cylindrical object is closed, and a plurality of channels for releasing ozone/oxygen-enriched solution are arranged on the half side wall of one side of the polygon of the diffuser 6; the channel for releasing the ozone/oxygen-enriched solution is a combination of a small hole and a gap, the middle of the channel is provided with a row of small holes 9, and two sides of the channel are respectively provided with a row of gaps 8; two adjacent channels (small holes 9 and/or slits 8) for releasing the ozone/oxygen-enriched solution on the same horizontal plane are arranged in an acute central included angle (namely, the central included angle formed by the connecting line of the two adjacent channels for releasing the ozone/oxygen-enriched solution and the central point is an acute angle, and as shown in A, B in figure 3, the two central included angles are acute angles), so as to ensure that the outlet pressure of the high-concentration ozone/oxygen-enriched solution is more than 2bar and the high-concentration ozone/oxygen-enriched solution is jetted to be mixed with water to be treated.

As shown in fig. 5, a diffuser 6 is provided in the water pipe through which water flows to be treated, upstream of the water flow; the diffuser 6 is inserted into a water pipeline in a direction perpendicular to the water flow, one side of the diffuser 6 with the small holes 9 and the narrow gaps 8 is right opposite to the upstream of the water flow, so that high-concentration oxygen-enriched solution in the diffuser 6 can be reversely sprayed out from the small holes 9 and the narrow gaps 8 opposite to the water flow, and when the high-concentration oxygen-enriched solution is sprayed out to react with water in a mixing way, because the pressure of the other side is low, a vortex can be generated to further enhance the mixing effect.

The small holes 9 and the narrow slits 8 on the diffuser 6 can generate backpressure of more than 3bar and enable the high-concentration oxygen-enriched solution to be ejected from the small holes 9 and/or the slits 8 in a reverse direction to the water flow at the outlet pressure of more than 3bar and to be ejected into the water to be treated in the water pipeline, and the pressure difference between the outlet pressure of the diffuser 6 and the pressure of the water to be treated is ensured to be more than 2 bar.

The working principle of the method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment is as follows: high-pressure low-temperature liquid oxygen is stored in the liquid oxygen storage tank 1; liquid oxygen comes out from the bottom of the liquid oxygen storage tank 1 and is conveyed to the electronic vaporizer 2, and the electronic vaporizer 2 continuously and quantitatively converts the liquid oxygen into oxygen; the oxygen generates ozone and oxygen through the ozone generator 3, and the ozone/oxygen is conveyed to the pressure regulating valve group 10 through a pipeline to regulate the pressure to be more than 2 bar; ozone/oxygen at a pressure of 2bar or more is fed into the reaction tank 5 from the tank top (sprayed from the ozone/oxygen nozzle) through the ozone/oxygen pipe 12, and the air in the tank is discharged; meanwhile, the dissolved water (the oxygen-enriched effluent which is treated by the ozone adding process and then filtered to remove impurities) is pressurized to more than 2bar by a water pump 4 and then is sent into a reaction tank 5 in a high-pressure fog form from the top of the tank (sprayed out from a water fog nozzle) by a dissolved water pipeline 11, and the pressure in the tank is kept to be more than 2 bar; in the reaction tank 5, the ozone/oxygen is mixed with pressurized dissolved water mist to form a gas-liquid mixture with a certain pressure; because the contact area of the water mist and the ozone/oxygen is large, and the pressure in the tank is increased to a set pressure environment, the ozone/oxygen is quickly dissolved in the water and a high-concentration ozone/oxygen-enriched solution is generated; with the continuous feeding of ozone/oxygen, when the pressure in the reaction tank continuously reaches more than 2bar, the high-concentration ozone/oxygen-enriched solution in the tank is converted into a saturated high-concentration ozone/oxygen-enriched solution; the saturated high-concentration ozone/oxygen-enriched solution is pumped to a control valve 14 capable of accurately controlling flow and pressure through a pipeline at the bottom of the reaction tank 5, the control valve 14 seals the saturated high-concentration ozone/oxygen-enriched solution between the reaction tank 5 and the control valve 14, and the saturated high-concentration ozone/oxygen-enriched solution becomes supersaturated high-concentration ozone/oxygen-enriched solution due to the continuous pressure in the reaction tank 5; opening control valve 14, supersaturated high concentration ozone/oxygen-enriched solution passes through the case in control valve 14 to carry diffuser 6 through the pipeline, form the mixed solution of high concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen microbubble and be reverse injection to aquatic through the passageway that is design on diffuser 6 namely aperture 9 and/or gap 8, high concentration ozone/oxygen-enriched solution is fast with water-soluble (meet with the material of being disinfected in aquatic and begin to disinfect), when throwing dissolved ozone/dissolved oxygen (increase the dissolved ozone/dissolved oxygen volume in aquatic), a small amount of ozone/oxygen microbubble is absorbed by rivers, in order to reach the purpose that increases dissolved ozone. The water quality instrument probe 7 is arranged at the downstream of water flow in a water pipeline and transmits signals to the signal receiver on the control valve 14 in real time, and the signals received by the signal receiver are processed by the PLC and then control the opening size of the control valve 14 so as to control the adding amount of the high-concentration ozone/oxygen-enriched solution, thereby achieving the pH value which a user wants to control.

A liquid level instrument (not marked in the figure) for outputting signals is arranged outside the tank body of the reaction tank 5, and the liquid level signals of the high-concentration ozone/oxygen-enriched solution in the tank control the water pump 4 and the switch 13 for injecting the ozone/oxygen through the PLC processor. When the liquid level drops, the PLC processor controls the water pump 4 and the switch 13 for injecting ozone/oxygen to be opened, and high-concentration ozone/oxygen-enriched solution is generated to supplement the amount of the high-concentration ozone/oxygen-enriched solution which is put into water and consumed by neutralization.

Mixing ozone/oxygen with pressurized dissolved water at a certain pressure to form a gas-water mixture with pressure, and converting the gas-water mixture into a saturated high-concentration ozone/oxygen-enriched solution in a reaction tank 5; the saturated high-concentration ozone/oxygen-enriched solution is sealed between the reaction tank 5 and the control valve 14 to form a supersaturated high-concentration ozone/oxygen-enriched solution; the supersaturated high concentration ozone/oxygen-enriched solution is fed into the water through the diffuser 6 (shown in fig. 3-5) (the supersaturated high concentration ozone/oxygen-enriched solution is more capable of reducing the generation of bubbles than the saturated high concentration ozone/oxygen-enriched solution); since the water pressure is at a low pressure, in order to avoid a large escape of ozone/oxygen bubbles in the mixed liquor in the pressure drop, the present invention designs this diffuser 6 (shown in fig. 3-5), the function of this diffuser 6 is to stabilize the system pressure, maintain the system back pressure and inject the high concentration ozone/oxygen enriched solution into the raw water. The supersaturated high-concentration ozone/oxygen-enriched solution is sprayed out through the small holes of the diffuser 6, and the high-concentration ozone/oxygen-enriched solution is rapidly dissolved with water. Because of the pressure drop, a small amount of ozone/oxygen bubbles escape from the high-concentration ozone/oxygen-enriched solution, so the small amount of ozone/oxygen bubbles and the high-concentration ozone/oxygen-enriched solution are ejected together to generate a strong vortex with water, the blending speed is accelerated, and the blending time is shortened. The application test case proves that the gas-water mixture or the mixed solution is converted into the supersaturated high-concentration ozone/oxygen-enriched solution (the effective utilization rate of oxygen reaches more than 99 percent), the solution of the high-concentration ozone/oxygen-enriched solution and water is liquid-liquid, the solution reaction time is completed instantly, and the fluctuation of the dissolved ozone amount can be accurately and stably controlled. Compared with an ozone/oxygen adding mode, the oxygen utilization rate is high, and the use cost of a user is greatly reduced.

The function of the diffuser 6: in addition to injecting the highly enriched oxygen solution into the water, the pressure of the whole system is maintained to prevent oxygen from escaping from the highly enriched oxygen solution. The small holes 9 and/or the slits 8 on the diffuser 6 keep the system back pressure more than 2bar, the supersaturated high-concentration ozone/oxygen-enriched solution is reversely sprayed into the water to be treated through the small holes 9 and/or the slits 8 on the diffuser 6, and the high-concentration ozone/oxygen-enriched solution can be rapidly dissolved with the water while ozone/oxygen bubbles are absorbed by the water vortex. This system back pressure will maintain the entire conversion process and pipeline pressure, preventing ozone/oxygen bubbles from escaping from the high concentration ozone/oxygen-enriched solution due to pressure drop, and preventing the high concentration ozone/oxygen-enriched solution from returning to the gas-water mixture.

The diffuser 6 is a hollow polygonal long cylindrical object with one closed end, and is inserted in a direction perpendicular to the water flow, one surface of the diffuser 6 with small holes 9 and/or slits 8 faces the upstream of the water flow (see fig. 4), the top end of the diffuser 6 is open (the open end) and can allow the supersaturated high-concentration ozone/oxygen-enriched solution to enter, and the supersaturated high-concentration ozone/oxygen-enriched solution is sprayed out from the small holes 9 and/or slits 8 in a reverse direction to the water flow and then is mixed with the water. The process of the solution entering the water is a depressurization process, in the process of pressure balance, the ozone pressure solution and a small amount of ozone/oxygen bubbles form vortex with the upstream of the water flow and the downstream of the water flow at the moment of spraying through the small holes 9 and/or the gaps 8, the small bubbles are absorbed by the water flow, the high-concentration ozone/oxygen-enriched solution reacts with the water, and the whole process is an intensified mixing and rapid dissolving and mixing process.

In conclusion, the invention provides a complete method for adding the ozone/oxygen-enriched solution by adopting the dissolved ozone adding system, the supersaturated high-concentration ozone/oxygen-enriched solution is generated by the pressure action of oxygen and filtered water in a tank, and then the supersaturated high-concentration ozone/oxygen-enriched solution is added into the water through a diffuser, so that the water quality of the water is adjusted.

In the prior art, ozone gas is used as the feed, a venturi nozzle is a device for projecting gas into water, and the gas and water are mixed at the constriction or throat of the venturi nozzle and then emitted through the expansion section. The injection speed of the solution is increased, the pressure is rapidly reduced, a large amount of ozone/oxygen is separated out from the solution to form large bubbles, and only a small part of ozone/oxygen participates in disinfection. Ozone/oxygen bubbles escape from the water in open environments such as shallow ponds, pools and the like due to different pressures at different heights in the water; ozone/oxygen bubbles can collapse in the tubing, causing vibration and cavitation, and affecting the accuracy of control of the amount of dissolved ozone.

The main function of the diffuser 6 in the present invention is to stabilize the pressure of the whole system above 2bar by means of the small holes 9 and the slits 8 shown in fig. 3-5, to always seal the ozone/oxygen in the supersaturated high concentration ozone/oxygen-enriched solution, and to generate stable high concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen bubbles when the pressure is released. As shown in fig. 3-5, a passage for releasing the ozone/oxygen-rich solution is formed on one half of the side wall of the diffuser 6, and the passage for releasing the ozone/oxygen-rich solution is a combination of a row of small holes 9 and a plurality of rows of slits 8 (a combination of small holes and slits); a plurality of channels for releasing the ozone/oxygen-enriched solution on the same horizontal plane are uniformly arranged at a central included angle of less than 180 degrees; two adjacent channels for releasing the ozone/oxygen-enriched solution on the same horizontal plane are arranged in an acute central included angle manner so as to ensure that the outlet pressure of the high-concentration ozone/oxygen-enriched solution is more than 2bar and the high-concentration ozone/oxygen-enriched solution is jetted and mixed with water to be treated. The pressure mixed liquid (the mixed liquid of the high concentration ozone/oxygen-enriched solution and the microbubbles having a certain pressure) has an inlet pressure and an outlet pressure (ideal state) which are the same through the small holes 9 and the slits 8, and is injected into the water at a very fast speed. Because the pressure drops, the pressure difference can cause part of ozone/oxygen to escape from the solution in the form of micro-bubbles, therefore, the mixed solution of high-concentration ozone/oxygen-enriched solution and micro-bubbles is sprayed together to be mixed with water, meanwhile, because the small holes 9 or the gaps 8 on each row are positioned on the same vertical line and are uniformly arranged, the pressure difference exists between the side with holes and the side without holes of the diffuser 6, the pressure mixed solution forms vortex in the water, and the mixing is further accelerated.

Compared with the prior art, the high-concentration ozone/oxygen-enriched solution diffuser solves the problems of low ozone/oxygen utilization rate (dissolution rate), noise, vibration, cavitation and the like; meanwhile, the application scene range of the high-concentration ozone/oxygen-enriched solution is wider, and the method can be applied to natural lakes, shallow channels, shallow pools, pipelines, liquid storage tanks and the like.

Example 2

The method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment is basically the same as the method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment 1; the difference lies in that: the diffuser 6 is arranged in a pool to be treated without flowing water, and a plurality of channels for releasing ozone/oxygen-enriched solution are arranged on the side walls of the two sides of the diffuser 6; the channel for releasing the ozone/oxygen-enriched solution is a combination of a small hole and a narrow gap.

As shown in fig. 2, the diffuser 6 is arranged in a pool to be treated, which has no water flow, and a plurality of circles of small holes and narrow gaps (a row of small holes 9 and a row of narrow gaps 8 are staggered) are formed on the whole cylindrical side wall of the diffuser 6, so that 360-degree throwing is realized.

The channels (small holes 9 and narrow slits 8) for releasing the ozone/oxygen-enriched solution can generate a back pressure of more than 3bar and enable the supersaturated oxygen-enriched solution to be sprayed into the water to be treated in the water tank at an outlet pressure of more than 3bar, thereby ensuring that the pressure difference between the outlet pressure of the diffuser and the pressure of the water to be treated is more than 2 bar.

The water outlet of the pool to be treated, which has no water flow, is connected with the inlet of the water pump 4 through a mixed water pipeline 11 (the oxygen-enriched outlet water treated by the ozone solution adding system and the adding process of the invention is used as the water for the water pump 4).

Example 3

The method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment is basically the same as the method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment 1; the difference lies in that: the liquid oxygen storage tank 1 and the electronic vaporizer 2 are not provided, and are replaced by an air separation device (air separation oxygen generation device), oxygen is generated through the air separation device, and ozone and oxygen are generated through the ozone generator 3; the high-concentration ozone/oxygen-enriched solution pipeline 15 is a large-diameter pipeline larger than DN25, the channel for releasing the ozone/oxygen-enriched solution is a gap, the middle of the channel is provided with a row of gaps 8, and the two sides of the channel are respectively provided with a row of gaps 8.

Example 4

The method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment is basically the same as the method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment 1; the difference lies in that: the electronic vaporizer 2 is replaced by a fin heat exchanger; the high-concentration ozone/oxygen-enriched solution pipeline 15 is a small-diameter pipeline of DN25, the channel for releasing the ozone/oxygen-enriched solution is a combination of small holes and narrow gaps, the middle of the channel is provided with a row of narrow gaps 8, and two sides of the channel are respectively provided with a row of small holes 9.

Example 5

The method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment is basically the same as the method for adding the ozone/oxygen-enriched solution by using the dissolved ozone adding system in the embodiment 1; the difference lies in that: the liquid oxygen storage tank 1 and the electronic vaporizer 2 are not arranged, and are replaced by a dewar or a steel cylinder. After oxygen is discharged from a Dewar flask or a steel cylinder, the pressure of ozone/oxygen generated by an ozone generator is adjusted to be more than 2bar through a pressure adjusting valve group 10; ozone/oxygen at a pressure of 2bar or more is fed into the reaction tank 5 from the tank top through an ozone/oxygen pipe 12 and the air in the tank is discharged; meanwhile, the dissolved water (the oxygen-enriched effluent which is treated by the ozone adding process and then filtered to remove impurities) is pressurized to more than 2bar by a water pump 4, then is sent into a reaction tank 5 in a high-pressure mist form from the top of the tank by a dissolved water pipeline 11, and the pressure in the tank is kept to be more than 2 bar; in the reaction tank 5, the ozone/oxygen is mixed with pressurized dissolved water mist to form a gas-liquid mixture with a certain pressure; because the contact area of the water mist and the ozone/oxygen is large, and the pressure in the tank is increased to a set pressure environment, the ozone/oxygen is quickly dissolved in the water and a high-concentration ozone/oxygen-enriched solution is generated; with the continuous feeding of ozone/oxygen, when the pressure in the reaction tank reaches more than 2bar, the high-concentration ozone/oxygen-enriched solution in the tank is converted into saturated high-concentration ozone/oxygen-enriched solution; the saturated high-concentration ozone/oxygen-enriched solution is pumped to a control valve 14 capable of accurately controlling flow and pressure through a pipeline at the bottom of the reaction tank 5, the control valve 14 seals the saturated high-concentration ozone/oxygen-enriched solution between the reaction tank 5 and the control valve 14, and the saturated high-concentration ozone/oxygen-enriched solution becomes supersaturated high-concentration ozone/oxygen-enriched solution due to the continuous pressure in the reaction tank 5; opening the control valve 14, and delivering the supersaturated high-concentration ozone/oxygen-enriched solution to the diffuser 6 through a valve core in the control valve 14 and a pipeline; the supersaturated high-concentration ozone/oxygen-enriched solution forms a mixed solution of the high-concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen microbubbles through the small holes and/or gaps in the diffuser 6, the mixed solution is reversely sprayed into the water, the high-concentration ozone/oxygen-enriched solution is quickly mixed with the water (meets with a disinfected substance in the water and starts to be disinfected), and the small amount of ozone/oxygen microbubbles are absorbed by the water flow.

Claims

1. A method for adding ozone/oxygen-enriched solution by adopting a dissolved ozone adding system is characterized by comprising the following steps:

(1) establishing a dissolved ozone adding system; the dissolved ozone adding system comprises a reaction tank, a diffuser, an ozone/oxygen pipeline and a dissolved water pipeline; a water mist nozzle and an ozone/oxygen nozzle are arranged on the top of the tank in the reaction tank; a water pump is arranged on the mixed water pipeline; the outlet of the water pump is connected with the water inlet and the water mist nozzle on the top of the reaction tank through a mixed water pipeline; the ozone/oxygen pipeline is provided with a pressure regulating valve group; the outlet of the pressure regulating valve group is connected with an ozone/oxygen inlet and an ozone/oxygen nozzle on the top of the reaction tank through an ozone/oxygen pipeline; the outlet at the bottom of the reaction tank is connected with the inlet of the diffuser; a control valve capable of accurately controlling flow and pressure is arranged on a high-concentration ozone/oxygen-enriched solution pipeline between an outlet at the bottom of the reaction tank and an inlet of the diffuser; the diffuser is arranged in the water to be treated; the diffuser is a hollow cylindrical object with one open end and the other closed end; a channel for releasing ozone/oxygen-enriched solution is arranged on the cylindrical side wall of the diffuser; the channel for releasing the ozone/oxygen-enriched solution is a small hole or a narrow gap, or the combination of the small hole and the narrow gap; the channel for releasing the ozone/oxygen-enriched solution can generate a certain back pressure and enables the supersaturated oxygen-enriched solution to be sprayed into the water to be treated at a certain outlet pressure, so that the pressure difference between the outlet pressure of the diffuser and the pressure of the water to be treated is ensured to be more than 2 bar; the ozone/oxygen-enriched solution is a high-concentration ozone/oxygen-enriched solution;

(3) ozone/oxygen with certain pressure enters the top of the reaction tank through an ozone/oxygen pipeline, and meanwhile, the dissolved water is pressurized to certain pressure through a water pump and then is sent into the reaction tank in a high-pressure mist form from the top of the tank through a dissolved water pipeline, and the pressure in the tank is kept at certain pressure; mixing ozone/oxygen with pressurized water in a reaction tank to form a gas-liquid mixture with a certain pressure; the contact area of the water mist and the ozone/oxygen is large, the pressure in the tank is increased to a certain pressure, and the ozone/oxygen is quickly dissolved in the water to generate a high-concentration ozone/oxygen-enriched solution; the pressure in the tank is continuously increased along with the continuous feeding of ozone/oxygen or the continuous feeding of water mist with certain pressure into the tank, and when the pressure in the reaction tank reaches certain pressure, the high-concentration ozone and the oxygen-enriched solution in the tank are converted into saturated high-concentration ozone/oxygen-enriched solution; the saturated high-concentration ozone/oxygen-enriched solution is pumped to a control valve capable of accurately controlling the flow and the pressure through a pipeline at the bottom of the reaction tank, the saturated high-concentration ozone/oxygen-enriched solution is sealed between the reaction tank and the control valve by the control valve, and the saturated high-concentration ozone/oxygen-enriched solution becomes supersaturated high-concentration ozone/oxygen-enriched solution due to the continuous pressure in the reaction tank; opening a control valve, conveying the supersaturated high-concentration ozone/oxygen-enriched solution to a diffuser through a valve core in the control valve and a pipeline, forming a mixed solution of the high-concentration ozone/oxygen-enriched solution and a small amount of ozone/oxygen microbubbles through a channel (namely a small hole and/or a gap) designed on the diffuser and releasing the ozone/oxygen-enriched solution, reversely spraying the mixed solution into water to be treated, rapidly dissolving the high-concentration ozone/oxygen-enriched solution in water, and absorbing the small amount of ozone/oxygen microbubbles by water flow;

(4) a water quality on-line detector is arranged at the downstream of water flow in a raw water or water pipeline or at the water outlet of a pool, a pond or a sewage tank, the water quality on-line detector is connected with a signal receiver, and the signal receiver is connected with the input end of a PLC (programmable logic controller); the output end of the PLC is connected with the control valve; the water quality on-line detector transmits signals to the signal receiver in real time, and the signals received by the signal receiver are processed by the PLC and then control the opening size of the control valve so as to control the input amount of the high-concentration ozone/oxygen-enriched solution.

2. The method of dosing an ozone/oxygen-enriched solution with a dissolved ozone dosing system as claimed in claim 1 wherein the path for releasing the carbonated solution is capable of generating a back pressure above 3bar and causing the supersaturated carbonated solution to be injected into the water to be treated at an outlet pressure greater than 3 bar; the diffuser backpressure was greater than 3bar and maintained the pressure of the entire system at greater than 3 bar.

3. The method for adding ozone/oxygen-enriched solution by using the dissolved ozone adding system as claimed in claim 1 or 2, wherein the inlet of the mixed water pipeline is connected with the oxygen-enriched water after the water to be treated is treated by adding the ozone solution.

4. The method for adding ozone/oxygen-enriched solution by adopting the dissolved ozone adding system as claimed in claim 1 or 2, wherein the high-concentration ozone/oxygen-enriched solution adding system further comprises a liquid oxygen storage tank, an electronic vaporizer or a heat exchanger and an ozone generator which are connected in sequence; or, also comprises an air separation device and an ozone generator which are connected in sequence; or, also comprises a Dewar flask or a steel cylinder, and an ozone generator which are connected in sequence; the outlet of the ozone generator is connected with the inlet of the ozone/oxygen pipeline; an ozone/oxygen pipeline connecting the outlet of the ozone generator and the gas inlet of the tank top of the reaction tank is provided with a pressure regulating valve group;

in the step (2), high-pressure low-temperature liquid oxygen is stored in a liquid oxygen storage tank, the liquid oxygen is discharged from the bottom of the liquid oxygen storage tank and is conveyed to an electronic vaporizer or a heat exchanger, and the electronic vaporizer or the heat exchanger continuously and quantitatively heats and gasifies the liquid oxygen into gaseous oxygen; or, oxygen is generated by an air separation plant; alternatively, the oxygen is stored in a dewar or cylinder, from which it is released; the oxygen is conveyed to an ozone generator through a pipeline to generate ozone and oxygen; the ozone/oxygen is conveyed to the pressure regulating valve group through a pipeline to be regulated to the pressure above 2bar, and then conveyed to the reaction tank through a pipeline.

5. The method for adding ozone/oxygen-enriched solution by using the dissolved ozone adding system as claimed in claim 1 or 2, wherein in the step (3), the ozone/oxygen with the pressure of more than 2bar enters the top of the reaction tank through the ozone/oxygen pipeline, and simultaneously, the dissolved water is pressurized to more than 2bar by the water pump, then is sent into the reaction tank from the top of the tank in a high-pressure mist form through the dissolved water pipeline, and the pressure in the tank is kept to be more than 2 bar.

6. The method for adding ozone/oxygen-enriched solution by using the dissolved ozone adding system as claimed in claim 1 or 2, wherein the diffuser is a hollow long cylindrical object with one end closed and the other half of the cross section of the hollow long cylindrical object is a polygon and the other half of the cross section of the hollow long cylindrical object is an arc, and a plurality of channels for releasing ozone/oxygen-enriched solution are arranged on the side wall of one half of one side of the polygon of the diffuser; the channel for releasing the ozone/oxygen-enriched solution is one or more rows of small holes, one or more rows of gaps, or a combination of one or more rows of small holes and one or more rows of gaps; or one or more apertures, one or more narrow slits, or a combination of one or more apertures and one or more narrow slits; the diffuser is inserted into the raw water perpendicular to the water flow direction, and the side of the diffuser with the small holes and/or slits is opposite to the upstream of the water flow, so that the high-concentration ozone/oxygen-enriched solution in the diffuser can be ejected from the small holes and/or slits in a reverse direction to the water flow.

7. The method for dosing an ozone/oxygen-enriched solution with a dissolved ozone dosing system as claimed in claim 6 wherein the orifices and/or slits in each row are located on the same vertical line and are evenly arranged.

8. The method for adding ozone/oxygen-enriched solution by using the dissolved ozone adding system as claimed in claim 1 or 2, wherein a plurality of channels for releasing ozone/oxygen-enriched solution on the same horizontal plane are uniformly arranged with a central included angle of less than 180 °; two adjacent channels which release ozone/oxygen-enriched solution on the same horizontal plane are arranged in an acute central included angle.

9. The method for dosing an ozone/oxygen-enriched solution with a dissolved ozone dosing system as claimed in claim 1 or 2, wherein the volume ratio of ozone/oxygen with a pressure above 2bar to the dissolved water is not less than 1: 10.

10. the method for adding ozone/oxygen-enriched solution by using the dissolved ozone adding system as claimed in claim 1 or 2, wherein a cooling liquid coil is arranged in the reaction tank, or a supplementary cooling water pipe for supplementing cooling water is arranged at the lower middle part of the reaction tank; the water mist nozzle on the top of the reaction tank is an industrial acoustic nano-scale atomizer.