CN210237220U - Device for treating wastewater by catalytic oxidation of ozone - Google Patents
Device for treating wastewater by catalytic oxidation of ozone Download PDFInfo
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- CN210237220U CN210237220U CN201721848257.8U CN201721848257U CN210237220U CN 210237220 U CN210237220 U CN 210237220U CN 201721848257 U CN201721848257 U CN 201721848257U CN 210237220 U CN210237220 U CN 210237220U
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Abstract
The utility model discloses a device for treating waste water by ozone catalytic oxidation, which comprises a lift pump, a micro-nano bubble generator, a main reactor, a secondary reactor, a micro-nano bubble sprayer, a diaphragm type microporous aerator, a porous catalyst filler baffle, an automatic chemical feeding system, a pH automatic control liquid feeding machine (double pumps), an ozone detector, a gas pump, an ozone tail gas inlet pipe, an ozone tail gas treatment device and a emptying pipe, the device for treating waste water by ozone catalytic oxidation can realize the micro-bubbling of ozone, is provided with an ozone tail gas reflux device, greatly improves the utilization rate of ozone, ensures the uninterrupted treatment under the premise of ensuring the hydraulic retention time by the design of a two-stage reactor, greatly improves the economic benefit, and the utility model adopts a full-automatic control system without manual control in the operation process, the running cost is reduced.
Description
Technical Field
The utility model belongs to the sewage treatment field relates to a wastewater treatment device, especially relates to a device of ozone catalytic oxidation treatment waste water.
Background
With the continuous development of industrial technology in China in recent years and the development and utilization of various new materials, a large amount of various waste water is discharged, the water environment in China is increasingly severe, and the waste water treatment is not slow.
The sewage treatment industry in China has achieved excellent results after decades of development, particularly since the reform is opened, but the development requirements of cities are still difficult to meet. Still, in many sewage treatment projects, water treated by a common sewage treatment process cannot be discharged up to the standard due to various reasons such as mixing of various high-concentration organic wastewater.
Ozone is well known for its strong oxidizing power, the oxidation-reduction potential is 2.07V, and it can oxidize most organic matters, especially difficult-to-degrade substances. Is the most oxidizing oxidant in the widely used oxidants at present. Its oxidizing power is the twice of chlorine, and ozone oxidation can produce a large amount of hydroxyl free radical-OH, so there is very strong oxidizing power, and the free radical makes the organic matter oxidize rapidly as secondary oxidant, can directly degrade the pollutant into water, carbon dioxide and harmless salt, still can not produce a large amount of mud simultaneously, can effectively avoid secondary pollution, and can improve the biodegradability of being handled waste water, and reaction sequence is easy to control moreover, be convenient for realize industrial automation, receive more and more attention in the application in the aspect of waste water treatment. Ozone is used in sewage treatment and needs to undergo a mass transfer process between two phases from a gas phase to a liquid phase, part of ozone dissolved in water from the gas phase is decomposed into oxygen, and part of ozone cannot react with target organic matters, so that the utilization rate of ozone in an ozone advanced oxidation process is low. Therefore, in order to overcome the defects of ozone, the ozone catalytic oxidation device with high ozone utilization rate needs to be researched and invented.
SUMMERY OF THE UTILITY MODEL
Not enough to current sewage treatment technique existence, the utility model aims at providing an ozone catalytic oxidation device of the incessant processing waste water that ozone oxidation is effectual, ozone high-usage, gas-liquid mixture is effectual and simple structure, running cost hang down.
The technical scheme of the utility model implementation method:
an apparatus for treating wastewater by catalytic ozonation, comprising:
the primary reactor and the secondary reactor are used for treating wastewater by catalytic oxidation of ozone;
the raw water tank is used for storing wastewater;
an ozone generator for producing ozone;
the lifting pump is used for lifting the wastewater to be treated into the main reactor and is connected with the raw water tank;
the micro-nano bubble generator is used for further processing the ozone gas generated by the ozone generator into ozone micro-bubbles;
the micro-nano bubble sprayer is used for introducing ozone micro bubbles generated by the micro-nano bubble generator into the main reactor;
the porous catalyst filler clapboard is used for placing the catalyst filler;
the gas collecting device is used for collecting residual gas in the reactor;
the ozone detector is used for detecting ozone in the residual gas and is connected with the gas collecting device;
the ozone tail gas inlet pipe is used for refluxing the ozone tail gas;
a gas pump for pressurizing the return ozone;
the diaphragm type microporous aerator is used for aeration of the backflow ozone;
the ozone tail gas treatment device is used for treating and discharging oxygen and residual ozone in the system;
the automatic dosing system is used for detecting and controlling the concentration of peroxide in the main reactor in real time;
and the pH automatic control liquid adding machine (double pumps) is used for detecting and controlling the pH value of the waste liquid to be treated in the raw water tank in real time.
Preferably, the wastewater is lifted by a lift pump and introduced into the main reactor, and the introduction speed of the wastewater can be controlled by controlling the rotating speed of a pump impeller so as to control the reaction time.
Preferably, the oxidation reactor is divided into a main reactor and a secondary reactor which is arranged outside the main reactor in a surrounding manner, and the wastewater flows into the secondary reactor from an overflow port of the main reactor.
Preferably, the ozone gas generated by the ozone generator is treated by the micro-nano bubble generator to be micro-bubbled.
Preferably, the generated ozone microbubbles are introduced into the main reactor through the micro-nano bubble nozzle and mixed with the wastewater.
Preferably, the wastewater rises through the catalyst packing baffle, in the process, a large amount of pollutants, ozone and peroxide are adsorbed on the surface and in the pore channels of the high-efficiency supported catalyst, and the target pollutants are oxidized and decomposed by the synergistic oxidation of the ozone and the peroxide under the catalytic action of the catalyst.
Preferably, the gas collected by the gas collecting device at the top of the main reactor is connected with a gas pump through an ozone tail gas inlet pipe, the incompletely dissolved and reacted ozone is repressurized through the gas pump and enters the secondary reactor through the aeration of the diaphragm type microporous aerator, and the full utilization of the ozone and the further treatment of the wastewater are realized.
Preferably, the membrane type microporous aerator is small in aeration bubble diameter, small in gas-liquid interface diameter, large in gas-liquid interface area and uniform in bubble diffusion, so that ozone gas can be fully dissolved in wastewater, meanwhile, the membrane type microporous aerator cannot generate hole blockage, is high in corrosion resistance, only needs to be easily replaced when needing to be replaced under special conditions, and greatly reduces the difficulty and cost of later maintenance.
Preferably, the gas generated by the ozone generator is a mixed gas of oxygen and ozone, wherein the ozone can be dissolved and utilized, and besides partial dissolution, a part of the oxygen can overflow and be collected by the gas collecting device, and finally is discharged after being treated by the ozone tail gas treatment device.
Drawings
FIG. 1 is a schematic structural diagram of the wastewater treatment device by catalytic ozonation.
FIG. 2 is a schematic diagram of the result of the device for treating wastewater by catalytic ozonation of landfill leachate.
In the figure, 1-raw water tank, 2-main reactor, 3-secondary reactor, 4-lift pump, 5-micro-nano bubble generator, 6-gas pump, 7-check valve, 8-gas flowmeter, 9-ozone generator, 10-membrane type microporous aerator, 11-micro-nano bubble sprayer, 12-catalyst filler plate, 13-overflow port, 14-emptying pipe, 15-overflow outlet, 16-sampling detection port, 17-dosing port, 18-automatic dosing device, 19-gas collection device, 20-ozone detector, 21-automatic valve, 22-automatic valve, 23-ozone tail gas inlet pipe, 24-tail gas treatment device, 25-pH detection head, 26-acidification port, 27-alkali adding port, 28-pH automatic control liquid adding machine (double pump).
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe the device for treating wastewater by catalytic ozonation in detail with reference to fig. 1.
Fig. 1 is a schematic structural diagram of an ozone catalytic oxidation wastewater treatment device provided by the utility model, including a main reactor 2, a lift pump 4, a micro-nano bubble generator 5, an ozone generator 9 and a micro-nano bubble nozzle 11, the ozone generator 9 is connected with the micro-nano bubble generator 5, and a check valve 7 and a gas flowmeter 8 are arranged on a communication pipeline between the ozone generator 9 and the micro-nano bubble generator 5, ozone gas generated by the ozone generator 9 is treated by the micro-nano bubble generator 5 to generate ozone microbubbles, and the generated ozone microbubbles are introduced into the main reactor through the micro-nano bubble nozzle to be mixed with wastewater; and the wastewater is lifted by the lifting pump 4 and then is introduced into the main reactor 2.
The structure of relevant oxidation reactor, the utility model discloses design meticulous has also been made, oxidation reactor includes main reactor 2 and the secondary reactor 3 of encircleing outside main reactor 2, waste water rises to in the main reactor 2 after the certain degree through setting up in the overflow mouth 13 inflow secondary reactor 3 on main reactor 2 limit wall, equally water in the secondary reactor 3 rises to after the certain degree through setting up overflow delivery port 15 play water on secondary reactor 3 limit wall, makes under the prerequisite of having guaranteed the required minimum water conservancy dwell time of reaction through the mode of overflow, and incessant operation, this has improved economic benefits, can think simultaneously, when water is full of overflow delivery port 15, waste water has been handled fully.
Further, the ozone generator 9 is connected to the gas pump 6, and an automatic valve 22 is provided on a communication pipe thereof and controlled by the ozone detector 20.
Furthermore, a porous catalyst filler partition plate is arranged in the main reactor and the secondary reactor, and catalyst fillers are placed on the partition plate.
Further, the top of the main reactor 2 is provided with a gas collecting device 19 for collecting residual gas in the system, the gas collecting device is connected with an ozone detector 20, after the collected gas is detected by the ozone detector 20, if the concentration of ozone reaches a required value, an automatic valve 21 connected with the ozone detector 20 is opened and an automatic valve 22 is closed, the gas is pressurized by a gas pump 6 and enters the secondary reactor through a membrane type microporous aerator 10 arranged at the bottom of the secondary reactor 3 for aeration, and the cyclic utilization of ozone is realized; on the contrary, if the concentration of the ozone in the collected gas does not reach the required value through the detection of the ozone detector 20, the automatic valve 21 is closed, the automatic valve 22 is opened, the collected residual gas is discharged after being treated by the ozone tail gas treatment device 24, the residual gas is prevented from polluting the environment, and meanwhile, the ozone in the secondary reactor is provided by the ozone generator 9.
The apparatus for treating wastewater by ozone catalytic oxidation further comprises an automatic chemical dosing system 18, wherein the automatic chemical dosing system 18 detects the concentration of peroxide in the main reactor 2 through a sampling detection port 16 provided in the main reactor, and simultaneously adds peroxide into the main reactor 2 through a chemical dosing port 17 provided in the main reactor to keep the concentration of peroxide in the main reactor 2 constant.
Further, the device for treating wastewater by ozone catalytic oxidation also comprises a pH automatic control liquid adding machine (double pump) 28, wherein the pH automatic control liquid adding machine (double pump) 28 detects the pH value of the waste liquid to be treated in the raw water tank 1 through a pH detection head 25 arranged in the raw water tank 1, and simultaneously adds acid or alkali into the raw water tank 1 through an acid adding port 26 and an alkali adding port 27 arranged in the raw water tank 1, so that the pH value of the waste liquid to be treated is adjusted.
Further, the device for treating wastewater by catalytic ozonation further comprises a raw water tank 1 for storing wastewater, wherein the raw water tank is communicated with the main reactor 2 through the lifting pump 4, and the speed of introducing wastewater can be controlled by controlling the rotating speed of a pump impeller, so that the reaction time is controlled.
Use the utility model provides a during the device of ozone catalytic oxidation processing waste water, pending waste water is stored in former water pitcher 1, after the regulation of pH, in 4 promotion entering main reactor 2 through the elevator pump, ozone gas that is produced by ozone generator 9 simultaneously is handled the back through micro-nano bubble generator, makes the little bubbling of ozone, then produced ozone microbubble lets in main reactor 2 through micro-nano bubble shower nozzle and mixes with waste water. Ozone and peroxide are cooperatively oxidized in the main reactor 2 and wastewater is treated under the catalysis of a catalyst, the wastewater after reaction treatment flows into the secondary reactor 3 through an overflow port 13, and gas collected by a gas collecting device 19 at the top of the main reactor 2 is detected by an ozone detector 20: (1) if the ozone concentration reaches the reflux requirement value, the automatic valve 21 is opened, the automatic valve 22 is closed, and the gas is pressurized by the gas pump 6 and then enters the secondary reactor for reutilization through the aeration of the diaphragm type microporous aerator 10 arranged at the bottom of the secondary reactor 3; (2) if the detected ozone concentration does not reach the reflux requirement value, the automatic valve 21 is closed, the automatic valve 22 is opened, the gas is treated by the ozone tail gas treatment device 24 and then discharged, and at the moment, the ozone in the secondary reactor 3 is provided by the ozone generator 9. The water after the ozone/peroxide treatment in the secondary reactor 3 by the catalyst is discharged through a water outlet overflow port 15.
The device for treating wastewater by catalytic ozonation of the present invention will be further described with reference to the following embodiments.
Example (b):
adopt the utility model discloses an ozone catalytic oxidation handles effluent plant is used for handling the biochemical tail water of landfill leachate, and the biochemical tail water quality of landfill leachate who handles is as follows: the pH value is 5.0-6.0, the COD concentration is 1400mg/L at 1000-. Adopt the utility model discloses the device: under the experimental conditions of pH =10 and reaction time of 120min, O is respectively adopted3、O3/Na2S2O8Catalyst for catalyzing O3Catalyst for catalyzing O3/Na2S2O8And (4) treating the biochemical leachate tail water.
FIG. 2 shows the reaction conditions of pH =10 and reaction time 120min, respectively, with O3、O3/Na2S2O8Catalyst for catalyzing O3Catalyst for catalyzing O3/Na2S2O8The results of the biochemical leachate tail water treatment, as can be seen from FIG. 2, under the same external experimental conditions, the catalyst catalyzes O3/Na2S2O8The treatment effect of the coupling oxidation system is obviously better than that of other three oxidation modes, and the COD removal rate and the chroma removal rate respectively reach 84.3 percent and 98 percent.
The above experiment shows that the utility model discloses the device passes through ozone and peroxide's collaborative oxidation and under catalyst catalytic action, controls reaction time simultaneously and handles waste water to optimum time, regulation pH value to handling optimum value, has effectively improved the utilization ratio of ozone to the treatment effect to high concentration organic waste water has been improved.
To sum up, the device for treating wastewater by catalytic ozonation of ozone of the utility model utilizes the ozone generated by the ozone generator 9 to enter the micro-nano bubble generator 5, so that the ozone is micro-bubbled, and finally enters the main reactor 2 through the micro-nano bubble nozzle 11 arranged at the bottom of the main reactor 2, thereby enhancing the mixing effect of ozone and wastewater; meanwhile, the feeding speed of the wastewater is controlled by controlling the rotating speed of the impeller of the lift pump 4, so that the reaction time is controlled to be in the optimal reaction time, and the reaction efficiency is improved; because of the addition of peroxide in the main reactor 2, the ozone/peroxide is cooperatively oxidized and the wastewater is treated under the catalytic action of the catalyst, and meanwhile, the pH value of the waste liquid to be treated in the raw water tank 1 is controlled by a pH automatic control dosing machine (double pump) 28, so that the pH value is kept at the optimal reaction efficiency, the reaction efficiency and the treatment effect are greatly improved, and the utilization rate of ozone is further improved; and the ozone tail gas is used for refluxing and is introduced into the secondary reactor 3, so that the cyclic utilization of the ozone is realized, the input amount of the ozone is reduced, and the cost is reduced.
The utility model discloses well designed oxidation reactor divide into main reactor 2 and secondary reactor 3 to the mode through the overflow lets the waste liquid flow, and this makes the utility model discloses waste water treatment's water conservancy dwell time has been guaranteed with minimum area to waste water is whole to flow, makes the incessant operation of device, and this has improved economic benefits greatly.
The above-described embodiments are merely preferred embodiments of the present invention. It should be noted that the protection scope of the present invention is not limited thereto, and any changes and modifications made by those skilled in the art based on the technical principle disclosed in the present invention should fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides a device of ozone catalytic oxidation treatment waste water which characterized in that: the device comprises a raw water tank, a lift pump, a micro-nano bubble generator, a main reactor, a secondary reactor, a micro-nano bubble sprayer, an automatic dosing system, a pH automatic control liquid adding machine, an ozone generator, an ozone detector and a gas pump; the secondary reactor is arranged outside the main reactor in a surrounding mode, and wastewater flows into the secondary reactor through an overflow port.
2. The apparatus for catalytic ozonation treatment of wastewater according to claim 1, wherein: and a diaphragm type microporous aerator is arranged in the secondary reactor and close to the bottom.
3. The apparatus for catalytic ozonation treatment of wastewater according to claim 1, wherein: porous catalyst filler partition plates are further arranged above the aerators in the main reactor and the secondary reactor, the partition plates are fixed above the aerators at the bottoms of the main reactor and the secondary reactor, and catalyst fillers are placed on the partition plates.
4. The apparatus for catalytic ozonation treatment of wastewater according to claim 1, wherein: and the top of the main reactor is also provided with a gas collecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848257.8U CN210237220U (en) | 2017-12-26 | 2017-12-26 | Device for treating wastewater by catalytic oxidation of ozone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848257.8U CN210237220U (en) | 2017-12-26 | 2017-12-26 | Device for treating wastewater by catalytic oxidation of ozone |
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| CN210237220U true CN210237220U (en) | 2020-04-03 |
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| CN201721848257.8U Expired - Fee Related CN210237220U (en) | 2017-12-26 | 2017-12-26 | Device for treating wastewater by catalytic oxidation of ozone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114057259A (en) * | 2021-11-16 | 2022-02-18 | 宁波市农业科学研究院 | Water treatment facilities based on ozone generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114057259A (en) * | 2021-11-16 | 2022-02-18 | 宁波市农业科学研究院 | Water treatment facilities based on ozone generator |
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