CN113173636B - Ozone cyclic oxidation reaction treatment system and treatment method - Google Patents

Abstract

The invention discloses an ozone cyclic oxidation reaction treatment system and a treatment method, and belongs to the field of industrial wastewater treatment and sewage advanced treatment. The ozone circulating oxidation reaction treatment system comprises an ozone generating device, a dissolved air pump and an ozone reactor, wherein a part of ozone reactor outlet water is led back to the dissolved air pump by arranging a backflow branch pipe to be circulated, so that part of unreacted ozone in the ozone reactor outlet water is further utilized; meanwhile, after being pressurized by the dissolved air pump, part of ozone is fully dissolved into the circulating water and enters the water inlet of the ozone reactor together with the circulating water, so that the solubility of the ozone in the water is greatly improved, and the oxidation effect is enhanced. Wherein, the gas-water mixing pipeline and the unique internal structure of the ozone reactor enhance the mixing power of ozone and sewage, prolong the gas-water reaction time and stroke, are beneficial to improving the mass transfer rate and improve the reaction efficiency of ozone and sewage.

Description

Ozone cyclic oxidation reaction treatment system and treatment method

Technical Field

The invention belongs to the field of industrial wastewater treatment and advanced wastewater treatment, relates to an oxidation treatment technology for wastewater treatment, and particularly relates to an ozone cyclic oxidation reaction treatment system and a treatment method.

Background

The ozone oxidation technology is a common advanced oxidation treatment technology for sewage treatment. Because the solubility of ozone in water is only about 10mg/L, ozone directly introduced into sewage cannot be fully utilized and is dissipated and lost, so that the problems of low ozone utilization rate, resource waste and the like are caused. In order to improve the utilization rate of ozone, the prior art mostly adopts a method of integrally heightening a reactor, so that the manufacturing cost of equipment is increased and the use site is limited. In addition, the prior art also adopts the mode that the micropore diffuser diffuses the ozone to improve the solubility of the ozone in the water, although the solubility and the utilization rate of the ozone are improved to a certain extent, the micropore diffuser is mostly fixedly arranged at the lower part in the ozone reactor, and the micropore diffuser is a plastic piece, so that the micropore diffuser is easy to damage after long-term use, and has the problems of difficult maintenance, increased maintenance cost and the like.

Therefore, the invention provides a novel ozone oxidation reaction treatment scheme aiming at the problems of low ozone solubility, low utilization rate, low reaction efficiency and the like in the ozone oxidation reaction process.

Disclosure of Invention

The invention aims to provide an ozone cyclic oxidation reaction treatment system and an ozone cyclic oxidation reaction treatment method, which can improve the solubility of ozone in water, realize the cyclic oxidation utilization of ozone and improve the utilization rate of ozone.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides an ozone cyclic oxidation reaction treatment system, which comprises an ozone generating device, a dissolved air pump and an ozone reactor, wherein a water inlet and a water outlet of the ozone reactor are respectively connected with a water inlet pipeline and a water outlet pipeline; a reflux branch pipe connected with the water inlet end of the dissolved air pump is connected to the water outlet pipeline in parallel so as to reflux part of the outlet water of the ozone reactor into the dissolved air pump; the water inlet pipeline is connected in parallel with a water inlet branch pipe connected with the water outlet end of the dissolved air pump so as to introduce the return water treated by the dissolved air pump into the ozone reactor; the air outlet of the ozone generating device is simultaneously connected with the air inlet of the ozone reactor and the air inlet of the dissolved air pump so as to provide ozone for the ozone reactor and the dissolved air pump.

Optionally, the ozone reactor comprises a shell, a feeding mixing chamber, a reaction chamber, a gas-water mixing device and a gas inlet pipe; the feeding mixing cavity is positioned in the shell and is provided with the water inlet; the reaction cavity is positioned in the shell and is isolated from the feeding mixing cavity; the reaction cavity is provided with a tail gas outlet and the water outlet; the gas-water mixing device comprises a gas-water mixing pipeline which can prolong the reaction time of ozone and sewage, the water inlet end of the gas-water mixing pipeline is communicated with the feeding mixing cavity so as to introduce the sewage into the gas-water mixing pipeline, the air inlet pipe is arranged on the shell, and the air inlet pipe is communicated with the water inlet end of the gas-water mixing pipeline so as to introduce the ozone into the gas-water mixing pipeline; the water outlet end of the gas-water mixing pipeline is connected with a first water outlet branch pipe and a second water outlet branch pipe in parallel, the outlet of the first water outlet branch pipe is communicated with the reaction cavity, the outlet of the second water outlet branch pipe is communicated with the feeding mixing cavity, the second water outlet branch pipe is opposite to the first water outlet branch pipe, the first water outlet branch pipe is arranged at the upstream section of water flow in the gas-water mixing pipeline, the first water outlet branch pipe is opposite to the second water outlet branch pipe, and the second water outlet branch pipe is arranged at the downstream section of water flow in the gas-water mixing pipeline. This ozone reactor simple structure, installation maintenance convenience can prolong ozone and sewage reaction time's air water hybrid tube through the setting and carry out the space to the reaction chamber and cut apart, have prolonged air water mixing time and mixing stroke, have strengthened ozone and sewage hybrid, are favorable to improving mass transfer rate, and then improve the reaction efficiency of ozone and sewage.

Optionally, the feeding mixing cavity is located at the lower part of the shell, the reaction cavity is located at the upper part of the shell, and the gas-water mixing pipeline is arranged in the reaction cavity.

Optionally, the gas-water mixing pipeline comprises a feeding pipe, the feeding pipe is vertically arranged, and the bottom end of the feeding pipe is a water inlet end; the middle part of inlet pipe is parallelly connected to have two at least the second goes out water branch pipe, the top shutoff of inlet pipe and parallelly connected have two at least first play water branch pipe.

Optionally, the feeding mixing chamber with the reaction chamber passes through the cavity baffle and keeps apart, arbitrary one first water branch pipe and arbitrary one second water branch pipe is the elbow structure, the elbow structure is including violently managing and standpipe, the one end of violently managing connect in the inlet pipe, the other end is connected the top of standpipe, the bottom of standpipe is pressed close to the cavity baffle sets up.

Optionally, the water outlet ends of the first water outlet branch pipes are of a corner structure, so that the water outlet direction of any first water outlet branch pipe is parallel to the cavity partition plate, and the water outlet direction of each first water outlet branch pipe is in the same circumferential direction.

Optionally, a water inlet end of the gas-water mixing pipeline is provided with a horn-shaped inlet; the outlet of the first water outlet branch pipe is arranged to be a cylindrical outlet; and the outlet of the second water outlet branch pipe is arranged to be a trumpet-shaped outlet or a cylindrical outlet.

Optionally, at least two layers of space partition plates are arranged in the reaction cavity along the height direction of the shell, and water holes are formed in any layer of space partition plate.

Optionally, the height of the housing is less than 4 m.

Meanwhile, the invention provides an ozone cyclic oxidation reaction treatment method, which is implemented based on the ozone cyclic oxidation reaction treatment system and comprises the following steps:

leading 45% -55% of the effluent flow of the ozone reactor back to the dissolved air pump; introducing 50-70% of ozone generated by the ozone generating device into the dissolved air pump, and fully dissolving the ozone in the dissolved air pump under the pressurization effect of the dissolved air pump and circulating the dissolved air in the dissolved air pump back to the water; then the circulating backwater is directly guided into the ozone reactor by the dissolved air pump; 30-50% of the ozone left in the ozone generating device is directly introduced into the ozone reactor.

Compared with the prior art, the invention has the following technical effects:

the ozone cyclic oxidation reaction treatment system and the treatment method provided by the invention have the advantages that the system structure is reasonably distributed, and partial ozone reactor outlet water is led back to the dissolved air pump by arranging the backflow branch pipe to be circulated, so that partial unreacted ozone in the ozone reactor outlet water is further utilized, and the utilization efficiency of the ozone is improved; after being pressurized by the dissolved air pump, the ozone is fully dissolved into the circulating water (namely, part of the outlet water of the ozone reactor) and enters the water inlet of the ozone reactor together with the circulating water (namely, part of the outlet water of the ozone reactor), so that the solubility of the ozone in the water is greatly improved, and the oxidation effect is enhanced.

Meanwhile, in the ozone reactor provided by the invention, the gas-water mixing pipeline and the unique internal structure of the reactor can enhance the mixing power of ozone and sewage, prolong the gas-water reaction time and stroke, and are beneficial to improving the mass transfer rate and improving the reaction efficiency of ozone and sewage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a longitudinal sectional view of an ozone reactor disclosed in an embodiment of the present invention;

FIG. 2 is a top plan view of an ozone reactor disclosed in an embodiment of the present invention;

FIG. 3 is a schematic flow chart of an ozone recycling oxidation treatment system according to an embodiment of the present invention;

wherein the reference numerals are:

100-an ozone cyclic oxidation reaction treatment system; 101-an ozone reactor; 102-an ozone generating device; 103-a dissolved air pump; 104-a water inlet pipeline; 105-a water outlet pipeline; 106-return manifold; 107-water inlet branch pipe; 108-first inlet manifold; 109-second inlet manifold;

1-a shell; 2-a mixed feed cavity; 3-a water inlet; 4-a reaction chamber; 5-tail gas outlet; 6-water outlet; 7-a gas-water mixing device; 71-a feed pipe; 72-first outlet branch; 73-a second outlet branch; 74-cross tube; 75-a standpipe; 76-trumpet-shaped inlet; 77-trumpet outlet; 8, an air inlet pipe; 9-a cavity partition plate; 10-a first space divider; 11-a second space bar; 12-inspection of the wells.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide an ozone reactor, which can solve the problems of low ozone solubility, low reaction rate and low utilization rate in the existing ozone oxidation reaction process.

The present invention also provides an ozone cyclic oxidation reaction treatment system having the above ozone reactor, so as to increase ozone solubility, realize cyclic oxidation utilization of ozone, and increase ozone utilization rate.

Still another object of the present invention is to provide an ozone cyclic oxidation reaction treatment method performed by the above ozone cyclic oxidation reaction treatment system.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The first embodiment is as follows:

as shown in fig. 1-2, the present embodiment provides an ozone reactor 101, which mainly comprises a casing 1, a feeding mixing chamber 2, a reaction chamber 4, a gas-water mixing device 7 and an air inlet pipe 8; the feeding and mixing cavity 2 is positioned in the shell 1, and a water inlet 3 is formed in the feeding and mixing cavity 2; the reaction cavity 4 is positioned in the shell 1, the reaction cavity 4 is isolated from the feeding mixing cavity 2, and the reaction cavity 4 is provided with a tail gas outlet 5 and a water outlet 6; the gas-water mixing device 7 comprises a gas-water mixing pipeline capable of prolonging the reaction time of ozone and sewage, the water inlet end of the gas-water mixing pipeline is communicated with the feeding mixing cavity 2 to introduce the sewage into the gas-water mixing pipeline, the water outlet end of the gas-water mixing pipeline is connected with a first water outlet branch pipe 72 and a second water outlet branch pipe 73 in parallel, the outlet of the first water outlet branch pipe 72 is communicated with the reaction cavity 4, the outlet of the second water outlet branch pipe 73 is communicated with the feeding mixing cavity 2 to realize the circulation of the gas-water mixture between the feeding mixing cavity 2 and the gas-water mixing pipeline, the second water outlet branch pipe 73 is arranged at the upstream section of the water flow in the gas-water mixing pipeline relative to the first water outlet branch pipe 72, the first water outlet branch pipe 72 is arranged at the downstream section of the water flow in the gas-water mixing pipeline relative to the second water outlet branch pipe 73 to ensure that the gas-water mixture is subjected to at least one-water circulation between the feeding mixing cavity 2 and the gas-water mixing pipeline through the second water outlet branch pipe 73 before reaching the first water outlet branch pipe 72 and being discharged into the reaction cavity 4 And the ring is used for improving the gas-water reaction time and the gas-water mixing stroke. This ozone reactor simple structure, installation maintenance convenience through setting up the air water mixing tube that can prolong ozone and sewage reaction time, extension air water mixing time and mixing stroke, reinforcing ozone and sewage hybrid are favorable to improving the mass transfer rate, and then improve the reaction efficiency of ozone and sewage.

In this embodiment, as shown in fig. 1, the feeding mixing chamber 2 is separated from the reaction chamber 4 by a chamber partition 9, the feeding mixing chamber 2 is located at the lower part of the casing 1, and the reaction chamber 4 is located at the upper part of the casing 1; the gas-water mixing pipeline is arranged in the reaction cavity 4. The gas-water mixing pipeline comprises a feeding pipe 71, the feeding pipe 71 is vertically arranged in the reaction cavity 4 and is distributed up and down based on the reaction cavity 4 and the feeding mixing cavity 2, the bottom end of the feeding pipe 71 is arranged to be a water inlet end, the middle part of the feeding pipe 71 is connected with at least two second water outlet branch pipes 73 in parallel, and the top end of the feeding pipe 71 is plugged and connected with at least two first water outlet branch pipes 72 in parallel. By adopting the structural form that the reaction chamber 4 and the feeding mixing chamber 2 are distributed up and down, raw water flows towards the top after entering from the bottom, and the fluid in the shell 1 keeps a counter-flow state and counter-flow power because the water continuously flows from the bottom, so that overlarge pressure caused by the gravity of the water flow on parts such as the cavity partition plate 9 is avoided, and the service life of the equipment is prolonged; meanwhile, because the ozone is gas and has low density, the tail gas outlet 5 is arranged at the top of the shell 1, which is more in line with the flowing characteristic of the gas flow. Besides, according to the actual arrangement requirement, the technical personnel in the field can also adopt the mode that the feeding mixing cavity and the reaction cavity are arranged in the left-right direction or the mode that the feeding mixing cavity is arranged above and below the reaction cavity, and correspondingly, the water inlet, the water outlet, the air inlet pipe and the tail gas outlet are also subjected to adaptive change.

In this embodiment, as shown in fig. 1-2, the water inlet end of the gas-water mixing pipe, i.e. the water inlet at the bottom end of the feeding pipe 71, is provided with a trumpet-shaped inlet 76, and the air inlet pipe 8 is arranged on the housing 1 and directly connected with the trumpet-shaped inlet 76 to introduce ozone into the gas-water mixing pipe. After ozone is introduced, an upward ozone airflow can be formed at the horn-shaped inlet 76, the ozone airflow can be preliminarily mixed and reacted with the sewage in the mixed feeding cavity 2, and meanwhile, the ozone airflow can also be used as power for guiding the sewage into the air inlet pipe 8, so that the water flow can be ensured to flow into the air-water mixing pipeline only at the horn-shaped inlet 76. The design of the horn-shaped inlet 76 can change the dynamic flow state of ozone and sewage, increase the specific surface area of contact of ozone and sewage and be beneficial to improving the reaction efficiency.

Further, as shown in fig. 1-2, the outlet of the first outlet branch pipe 72 in this embodiment may be configured as a cylindrical outlet, and the outlet of the second outlet branch pipe 73 may be configured as a trumpet-shaped outlet or a cylindrical outlet; the outlet of the first outlet branch pipe 72 is preferably provided as a cylindrical outlet, and the outlet of the second outlet branch pipe 73 is preferably provided as a trumpet-shaped outlet 77. The trumpet-shaped outlet 77 penetrates through the cavity partition plate 9 to be communicated with the feeding mixing cavity 2 at the bottom, so that part of gas-water mixture in the gas-water mixing pipeline flows through the second water outlet branch pipe 73 to flow back to the feeding mixing cavity 2, the circulation of the gas-water mixed flow is realized, and the gas-water mixing path and the gas-water reaction time are prolonged. Wherein, the design of tubaeform export 77, convertible ozone and sewage power flow state increase the specific surface area of ozone and sewage contact, are favorable to improving reaction efficiency, and tubaeform export 77 can cushion the impact of decurrent rivers to equipment simultaneously, is favorable to improving equipment's life.

Further, as shown in fig. 1-2, in the present embodiment, each of the first outlet branch pipes 72 and each of the second outlet branch pipes 73 are of a bent pipe structure; the bent pipe structure can be a circular arc bent pipe structure or a right-angle corner-shaped bent pipe structure. As shown in fig. 1-2, the elbow structure of the present embodiment is preferably a right-angle corner elbow structure, which includes a horizontal pipe 74 and a vertical pipe 75, the horizontal pipe 74 is horizontally disposed, and one end of the horizontal pipe is connected to the feeding pipe 71, and the other end of the horizontal pipe is connected to the top end of the vertical pipe 75 (the horizontal pipe 74 and the vertical pipe 75 can be connected through an arc pipe), the vertical pipe 75 is vertically disposed, the vertical pipe 75 is perpendicular to the horizontal pipe 74, and the bottom end of the vertical pipe 75, that is, the water outlet of the vertical pipe 75 is disposed close to the cavity partition 9. As shown in fig. 2, in order to ensure that the outlet water of the first outlet branch pipes 72 forms a rotational flow, the outlet ends of the first outlet branch pipes 72 may be arranged at corners, so that the outlet water directions of any first outlet branch pipe 72 are all parallel to the horizontal direction of the cavity partition 9, and the outlet water directions of the first outlet branch pipes 72 are in the same circumferential direction, that is, after the first outlet branch pipes 72 discharge water, each outlet water flow forms a clockwise rotational flow or an anticlockwise rotational flow, which may further improve the reaction efficiency.

In this embodiment, the more than two second water outlet branch pipes 73 and the more than two first water outlet branch pipes 72 are connected in parallel, which is mainly considered from the angle of actual flow, the more the second water outlet branch pipes 73 and the first water outlet branch pipes 72 are provided, the larger the pipe flow is, the higher the liquid outlet efficiency is, the larger the turbulent power formed in the pipe is, the medium in the gas-water mixing pipe can be guided out in time, and the damage to the gas-water mixing pipe due to the too large pressure in the gas-water mixing pipe is avoided. According to different flow rates and turbulent power requirements, the number, pipe diameter and pipe length of the second water outlet branch pipes 73 and the first water outlet branch pipes 72 can be adjusted correspondingly by those skilled in the art.

Further, as shown in fig. 1-2, the present embodiment preferably provides 4 first outlet branch pipes 72 and 4 second outlet branch pipes 73, respectively. The 4 first water outlet branch pipes 72 are uniformly distributed along the circumferential direction of the feeding pipe 71, and the horizontal pipes 74 of the first water outlet branch pipes 72 are positioned at the same height level; correspondingly, 4 second water outlet branch pipes 73 are uniformly distributed along the circumferential direction of the feeding pipe 71, and the transverse pipes 74 of the respective second water outlet branch pipes 73 are located at the same height level. The vertical pipe 75 of the second water outlet branch pipe 73 is lower than the vertical pipe 75 of the first water outlet branch pipe 72, so that the height level of the second water outlet branch pipe 73 is lower than the height level of the first water outlet branch pipe 72, thereby forming a high-layer water outlet pipe and a low-layer water outlet pipe on the feeding pipe 71, wherein the low-layer water outlet pipe, namely the second water outlet branch pipe 73, is used for the backflow circulation of the gas-water mixture, and the high-layer water outlet pipe, namely the first water outlet branch pipe 72, is used for discharging the gas-water mixture to the reaction chamber 4. Meanwhile, in order to avoid interference between the first outlet branch pipes 72 and the second outlet branch pipes 73, the first outlet branch pipes 72 and the second outlet branch pipes 73 may be staggered in the circumferential direction when the water tank is installed.

In this embodiment, it is preferable that each first outlet branch pipe 72 is surrounded outside each second outlet branch pipe 73, but the present invention is not limited to this positional relationship, and in actual practice, the first outlet branch pipe 72 and the second outlet branch pipe 73 may be installed at positions that do not interfere with each other. The gas-water mixing device of the embodiment is integrally of the pure pipeline structure, is hardly damaged, and reduces the use and installation of wearing parts. Moreover, the feed pipe 71, the first water outlet branch pipe 72 and the second water outlet branch pipe 73 in the gas-water mixing device 7 preferably adopt long and thin pipelines, and the whole gas-water mixing pipeline is bent and roundabout, so that the gas-water mixing stroke can be prolonged as much as possible, strong turbulence power is provided, the mass transfer rate is improved, the ozone and sewage mixing power is enhanced, and the reaction efficiency is improved.

Further, as shown in fig. 1, the off-gas outlet 5 is disposed at the top of the reaction chamber 4, that is, the off-gas outlet 5 is disposed at the top of the housing 1; the water outlet 6 is arranged at the top of the side wall of the reaction chamber 4, namely the water outlet 6 is arranged at the top of the side wall of the shell 1. At least one layer of space partition plate is arranged in the reaction cavity 4 along the height direction of the shell 1, and water holes are formed in the space partition plate. The present embodiment preferably provides two layers of space-dividing plates, i.e., the first space-dividing plate 10 and the second space-dividing plate 11. Wherein, the first space division plate 10 is arranged in the middle of the reaction chamber 4, and a water through hole, such as a water through hole with a diameter of 200mm, is arranged in the center of the first space division plate; the second space divider 11 is disposed above the first space divider 10 and below the water outlet 6, and the second space divider 11 may have a plurality of water holes, for example, 4 water holes with a diameter of 80mm, opened around the partition. The shell 1 is internally provided with a cavity partition plate 9, a first space partition plate 10 and a second space partition plate 11 from bottom to top in sequence, so that the shell 1 is divided into a first cavity, a second cavity, a third cavity and a fourth cavity from top to top, sewage and ozone gas are preliminarily mixed in the first cavity (namely, a mixed feeding cavity 2) and then enter a gas-water mixing pipeline through a horn-shaped inlet 76 of a feeding pipe 71, the gas-water mixed flow firstly reaches a second water outlet branch pipe 73 and flows back to the first cavity (namely, the mixed feeding cavity 2) through a horn-shaped outlet 77 of the second water outlet branch pipe 73, and at least one circulation of the gas-water mixed flow is realized; after a certain mixing time, the gas-water mixed flow can also reach the first water outlet branch pipe 72 and be discharged from the outlet of the first water outlet branch pipe 72 to a second cavity (namely, a cavity between the cavity partition plate 9 and the first space partition plate 10, wherein the first space partition plate 10 is positioned above the second water outlet branch pipe 73 and below the first water outlet branch pipe 72), and a rotational flow is formed in the second cavity; then, the air-water mixed flow continuously flows upwards, enters a third cavity (namely, a cavity between the first space division plate 10 and the second space division plate 11) through a central water through hole of the first space division plate 10, then sequentially enters a fourth cavity (namely, a space above the second space division plate 11) through a peripheral water through hole of the second space division plate 11, and finally is discharged out of the shell from the fourth cavity. It should be noted that the number of the space dividing plates is not limited to two, and the number of the water holes and the diameter of the water holes on each space dividing plate are not limited to the above form, for example, a plurality of water holes on the lower partition plate and one water hole on the upper partition plate may be adopted. Through setting up the space division board, can provide suitable resistance for the rivers of upwards flowing in the reaction chamber 4, and then increase ozone and sewage contact time, improve reaction efficiency.

Especially, it is emphasized that the ozone reactor 101 of the present embodiment can reduce the height of the ozone reactor as a whole without installing vulnerable parts such as a micro-porous diffuser, thereby reducing the manufacturing and operating cost of the equipment and breaking through the limitation of the height of the use place. As shown in FIG. 1, the casing 1 of the present embodiment is preferably a cylindrical casing, and its axial height is set to be less than 4m, preferably 3.8m, and its diameter may be set to the width of the conventional ozone reactor. The shell 1 of the embodiment is simple to manufacture, convenient to maintain and convenient to use.

Further, as shown in fig. 1, the present embodiment further provides an inspection hole 12 on a side wall or a top of the housing 1 for equipment maintenance and component replacement.

When the device is used, raw water (sewage) is introduced into the feeding mixing cavity 2 from the water inlet 3, ozone is introduced into the gas-water mixing device 7 through the air inlet pipe 8, the ozone and the raw water simultaneously enter through the horn-shaped inlet 76 of the gas-water mixing device 7 and are fully mixed under the power of the small-channel strong turbulence of the gas-water mixing device 7, and then gas-water mixed flow media are discharged from bottom to top and from top to bottom so as to ensure uniform mixing. The gas-water mixed flow medium discharged from the gas-water mixing device 7 flows from the bottom end to the top end of the reaction cavity 4, and in the process, the gas-water mixed flow medium sequentially passes through the water holes in the first air partition plate 10 and the second air partition plate 11 to reach the top end of the reaction cavity 4, then the liquid is discharged through the water outlet 6, and the gas is discharged through the tail gas outlet 5 at the top. Wherein, raw water (sewage) and ozone are provided with pressure, so that the whole equipment does not need to be provided with an additional power unit, and can realize the circulating flow of water flow and air flow in the shell 1.

The ozone reactor that this embodiment provided simple structure, installation maintenance convenience can prolong ozone and sewage reaction time's air water hybrid tube through the setting to do the space at the reaction intracavity and cut apart, can effectively prolong air water hybrid time and mixing stroke, be favorable to improving mass transfer rate, reinforcing ozone and sewage hybrid, and then improve the reaction efficiency of ozone and sewage. In addition, the ozone reactor of the embodiment also has the following specific beneficial effects:

(1) the ozone reactor is simple to manufacture and install, convenient to maintain and low in equipment cost;

(2) the gas-water mixing device in the ozone reactor changes the dynamic flow state of ozone and sewage by arranging the bell mouths on the feeding pipe and the second water outlet branch pipe, so that the specific surface area of contact of the ozone and the sewage can be increased, and the reaction efficiency can be improved; meanwhile, the corner outlet arranged on the first water outlet branch pipe can realize the rotational flow of water flow, is beneficial to changing the dynamic flow state of ozone and sewage, and improves the reaction efficiency;

(3) the space partition plate is arranged in the ozone reactor along the height direction, so that the water flow state can be changed, and meanwhile, the physical reaction grading can be realized in the shell, the contact time of ozone and sewage in the reaction cavity can be increased, and the reaction efficiency can be improved;

(4) the integral height of the ozone reactor is lower than 4 meters, compared with the prior art, the height of the ozone reactor is reduced, and the manufacturing, maintenance and operation costs of equipment are reduced;

(5) the gas-water mixing device adopts a pure pipeline structure, is hardly damaged, reduces the number of wearing parts in the equipment, and has the advantages of simple manufacture, convenient maintenance and convenient use.

Example two:

as shown in fig. 3, the present embodiment provides an ozone circulation oxidation reaction treatment system 100, which includes an ozone generator 102, a dissolved air pump 103, and an ozone reactor 101 according to the first embodiment, wherein a water inlet 3 and a water outlet 6 of the ozone reactor 101 are respectively connected to a water inlet pipeline 104 and a water outlet pipeline 105; a reflux branch pipe 106 connected with the water inlet end of the dissolved air pump 103 is connected in parallel on the water outlet pipeline 104 so as to reflux part of the water outlet of the ozone reactor 101 into the dissolved air pump 103; the water inlet pipeline 104 is connected in parallel with a water inlet branch pipe 107 connected with the water outlet end of the dissolved air pump 103 so as to introduce the backwater treated by the dissolved air pump 103 into the ozone reactor 101; the ozone generating device 102 is provided with a first air inlet branch pipe 108 and a second air inlet branch pipe 109 which are respectively connected with an air inlet of the ozone reactor 101 and an air inlet of the dissolved air pump 103 so as to provide ozone for the ozone reactor 101 and the dissolved air pump 103. Wherein, a pipeline mixer is arranged at the connection position of the water inlet pipeline 104 and the water inlet branch pipe 107 so as to realize the sufficient mixing of the branched incoming water and the raw incoming water.

The main functions of the dissolved air pump 103 in this embodiment are as follows: the suction inlet of the dissolved air pump 103 can suck in ozone gas by utilizing the negative pressure effect, and the pump impeller rotating at high speed mixes and stirs liquid (the circulating backwater) and gas (ozone), so that an additional stirrer and a mixer are not needed; meanwhile, due to the pressurized mixing in the pump, the gas (ozone) can be fully dissolved in the liquid (the circulating backwater), and the dissolving efficiency of the ozone is greatly improved.

An ozone cyclic oxidation reaction treatment method implemented based on the ozone cyclic oxidation reaction treatment system 100 includes:

leading 45-55% of the effluent flow of the ozone reactor 101 back to the dissolved air pump 103; 50-70% of the ozone generated by the ozone generating device 102 is introduced into the dissolved air pump 103 and is fully dissolved in the circulating return water in the dissolved air pump 103 under the pressurization effect of the dissolved air pump 103; then, circulating return water is directly introduced into the ozone reactor 101 by the dissolved air pump 103; 30-50% of the ozone left in the ozone generator 102 is directly introduced into the ozone reactor 101.

Leading 45-55% of the effluent backflow water quantity of the ozone reactor 101 into the dissolved air pump 103, leading 50-70% of ozone generated by the ozone generating device 102 into the dissolved air pump 103, and pressurizing the ozone through the dissolved air pump 103, so that the solubility of the ozone in water is greatly improved, and the oxidation effect is enhanced. 45% -55% of the effluent in the ozone reactor 101 is circulated by the dissolved air pump 103, and part of the unreacted ozone can be further utilized, so that the utilization efficiency of the ozone is improved. 30-50% of ozone generated by the ozone generating device 102 directly enters the air inlet of the ozone reactor 101, the ozone reactor 101 is provided with the air-water mixing device 7, and under the action of strong turbulence power of a small channel in the air-water mixing device 7, the mass transfer rate is improved, the enhancement of the mixing power of ozone and sewage is facilitated, and the reaction efficiency is improved.

In one case, 45% of the effluent from the ozone reactor 101 may be introduced into the dissolved air pump 103 for recirculation, 50% of the ozone generated by the ozone generator 102 may be introduced into the dissolved air pump 103, and the remaining 50% of the ozone generated by the ozone generator 102 may be directly introduced into the air inlet of the ozone reactor 101; in another case, 55% of the effluent from the ozone reactor 101 may be introduced into the dissolved air pump 103 for recirculation, 70% of the ozone generated by the ozone generator 102 may be introduced into the dissolved air pump 103, and the remaining 30% of the ozone generated by the ozone generator 102 may be directly introduced into the air inlet of the ozone reactor 101. Both above-mentioned two kinds of circumstances can realize the promotion to ozone, sewage reaction efficiency.

Therefore, the ozone cyclic oxidation reaction treatment system in the embodiment is simple to manufacture and install, convenient to maintain and low in equipment cost; the water inlet of the dissolved air pump adopts the water outlet of the ozone reactor, which is beneficial to improving the utilization rate of ozone.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (4)

1. An ozone cyclic oxidation reaction treatment system is characterized by comprising an ozone generating device, a dissolved air pump and an ozone reactor, wherein a water inlet and a water outlet of the ozone reactor are respectively connected with a water inlet pipeline and a water outlet pipeline; a reflux branch pipe connected with the water inlet end of the dissolved air pump is connected to the water outlet pipeline in parallel so as to reflux part of the outlet water of the ozone reactor into the dissolved air pump; the water inlet pipeline is connected in parallel with a water inlet branch pipe connected with the water outlet end of the dissolved air pump so as to introduce the return water treated by the dissolved air pump into the ozone reactor; the air outlet of the ozone generating device is simultaneously connected with the air inlet of the ozone reactor and the air inlet of the dissolved air pump so as to provide ozone for the ozone reactor and the dissolved air pump;

the ozone reactor comprises a shell, a feeding mixing cavity, a reaction cavity, a gas-water mixing device and a gas inlet pipe; the feeding mixing cavity is positioned in the shell and is provided with the water inlet; the reaction cavity is positioned in the shell and is isolated from the feeding mixing cavity; the reaction cavity is provided with a tail gas outlet and the water outlet; the gas-water mixing device comprises a gas-water mixing pipeline which can prolong the reaction time of ozone and sewage, the water inlet end of the gas-water mixing pipeline is communicated with the feeding mixing cavity so as to introduce the sewage into the gas-water mixing pipeline, the air inlet pipe is arranged on the shell, and the air inlet pipe is communicated with the water inlet end of the gas-water mixing pipeline so as to introduce the ozone into the gas-water mixing pipeline; a first water outlet branch pipe and a second water outlet branch pipe are connected in parallel at the water outlet end of the gas-water mixing pipeline, the outlet of the first water outlet branch pipe is communicated with the reaction cavity, the outlet of the second water outlet branch pipe is communicated with the feeding mixing cavity, the second water outlet branch pipe is arranged at the upstream section of water flow in the gas-water mixing pipeline relative to the first water outlet branch pipe, and the first water outlet branch pipe is arranged at the downstream section of water flow in the gas-water mixing pipeline relative to the second water outlet branch pipe;

the feeding mixing cavity is positioned at the lower part of the shell, the reaction cavity is positioned at the upper part of the shell, and the gas-water mixing pipeline is arranged in the reaction cavity; the gas-water mixing pipeline comprises a feeding pipe, the feeding pipe is vertically arranged, and the bottom end of the feeding pipe is a water inlet end; the middle part of the feeding pipe is connected with at least two second water outlet branch pipes in parallel, and the top end of the feeding pipe is plugged and connected with at least two first water outlet branch pipes in parallel; the feeding mixing cavity is separated from the reaction cavity through a cavity partition plate, any one of the first water outlet branch pipes and any one of the second water outlet branch pipes are of a bent pipe structure, the bent pipe structure comprises a transverse pipe and a vertical pipe, one end of the transverse pipe is connected to the feeding pipe, the other end of the transverse pipe is connected with the top end of the vertical pipe, and the bottom end of the vertical pipe is arranged close to the cavity partition plate; the water outlet ends of the first water outlet branch pipes are of corner structures, so that the water outlet direction of any first water outlet branch pipe is parallel to the cavity partition plate, and the water outlet direction of each first water outlet branch pipe is in the same circumferential direction;

at least two layers of space partition plates are arranged in the reaction cavity along the height direction of the shell, and water holes are formed in any one layer of space partition plate.

2. The ozone cyclic oxidation reaction treatment system of claim 1, wherein a trumpet-shaped inlet is arranged at the water inlet end of the gas-water mixing pipeline; the outlet of the first water outlet branch pipe is arranged to be a cylindrical outlet; and the outlet of the second water outlet branch pipe is arranged to be a trumpet-shaped outlet or a cylindrical outlet.

3. The ozone cyclic oxidation reaction treatment system of claim 1, wherein the height of the housing is less than 4 m.

4. An ozone cyclic oxidation reaction treatment method implemented based on the ozone cyclic oxidation reaction treatment system according to any one of claims 1 to 3, comprising:

leading 45% -55% of the effluent flow of the ozone reactor back to the dissolved air pump; introducing 50-70% of ozone generated by the ozone generating device into the dissolved air pump, and fully dissolving the ozone in the dissolved air pump under the pressurization effect of the dissolved air pump and circulating the dissolved air in the dissolved air pump back to the water; then the circulating backwater is directly guided into the ozone reactor by the dissolved air pump; 30-50% of the ozone left in the ozone generating device is directly introduced into the ozone reactor.

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