CN111320299A - Photocatalytic-ozone combined fluidized bed purification device and use method thereof - Google Patents
Photocatalytic-ozone combined fluidized bed purification device and use method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention provides a photocatalytic-ozone combined fluidized bed device and a using method thereof. The light source device provided by the invention can provide irradiation light with an included angle range of 0 degrees & lt theta & lt 90 degrees between the incident direction and the central axis of the reactor in the reactor, can provide an effective light source in the reactor, and is provided with the reflecting surface on the inner wall of the reactor, so that the transmission of light rays in the reactor is facilitated, and the utilization rate of the light source is improved. In addition, the controller is introduced, so that automatic control can be effectively realized, the labor cost is reduced, and the treatment effect is improved. The problems of low sewage treatment rate, poor treatment effect and difficult catalyst recovery are solved on the whole.
Description
Technical Field
The invention relates to the field of fluidized bed devices, in particular to a photocatalytic-ozone combined fluidized bed purification device and a using method thereof.
Background
The traditional treatment of refractory organic matter mainly includes anaerobic biological treatment, advanced oxidation, photocatalytic degradation and membrane separation. The traditional treatment devices have the defects of long hydraulic retention time and low removal rate of the anaerobic biological treatment method; the advanced oxidation method has large drug consumption and high treatment cost; the treatment by the photocatalysis method is not thorough, the adsorption carrier is easy to saturate in the reaction process, and the operation period is short; the membrane separation technology has the advantages of unstable performance of various membranes, easy blockage of membrane pores, high cost of a membrane system and short service life. It is generally difficult to degrade organisms in the wastewater.
For example, chinese patent CN02281186.9 discloses a three-phase internal circulation fluidized bed photocatalytic reactor; also for example, chinese patent CN03257692.7 discloses a forced circulation three-phase fluidized bed photocatalytic reactor; chinese patent CN 106215827 discloses a photocatalytic micro liquid-solid fluidized bed reactor, etc., which has the following disadvantages, though the reactants and the catalyst in the photocatalytic fluidized bed reactor are uniformly mixed, the mass transfer and heat transfer rates are high, the effective illumination area is large, and the quantum efficiency is high: first, since the macro-sightseeing catalytic reactor is generally characterized by 5cm or more, its size is large, the treatment cost is high, and large-scale treatment is impossible. In addition, light is severely attenuated when passing through the solution or catalyst particles, which results in low catalytic efficiency, long reaction time, and the like. Secondly, the existing catalyst also has the problem of difficult recovery, which also affects the treatment efficiency of the wastewater and is not beneficial to the actual wastewater treatment.
In summary, in the field of fluidized bed devices, there are many practical problems to be solved in practical applications.
Disclosure of Invention
The invention provides a photocatalytic-ozone combined fluidized bed device to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a photocatalysis-ozone combined fluidized bed purification device comprises a reactor; one side of the reactor is connected with a purified water outlet and a connecting pipe, and a first liquid distributor is arranged at the joint of the purified water outlet and the reactor; the reactor is provided with a wastewater inlet, and a liquid distributor II is arranged at the joint of the wastewater inlet and the reactor; an aeration disc is arranged at the bottom of the reactor; the reactor is internally provided with a light source device, photocatalyst filler and a guide cylinder with openings at two ends, the light source device can provide irradiation light with an included angle range of 0 degrees < theta < 90 degrees between an incident direction and the central axis of the reactor in the reactor, and the guide cylinder is internally provided with an upflow channel communicated with the openings at two ends.
Optionally, the first liquid distributor and the second liquid distributor are screens.
Optionally, the light source device includes a lamp tube and a lamp tube base, the lamp tube base is installed at the middle end inside the reactor, the lamp tube is connected to the lamp tube base, and the lamp tube includes a simulated sunlight, a xenon lamp and an ultraviolet lamp.
Optionally, a side surface of the reactor is provided with a glass window corresponding to the light source device.
Optionally, a loading cylinder is installed in the reactor, the photocatalyst filler is installed in the loading cylinder, and the photocatalyst filler comprises graphene macroscopic bodies.
Optionally, the inner wall of the reactor is provided with a reflecting surface of the irradiated light.
In addition, the use method of the photocatalytic-ozone combined fluidized bed purification device comprises the following steps:
a. recovering collected wastewater, and adding a pH agent into the wastewater to ensure that the pH value in the wastewater is between 2 and 10;
b. installing a graphene macroscopic body in a loading cylinder, then installing the graphene macroscopic body in the reactor, and then irradiating the inside of the reactor for 10-25min by using a light source with the wavelength of 254-365 nm and the power of 12-40W;
c. connecting an ozone generator to a connecting port of the ozone generator through a pipeline, starting the ozone generator, and blowing ozone into a reactor;
d. connecting one end of a wastewater inlet pipe to the liquid inlet of the reactor and abutting against the liquid distributor, and connecting the other end of the wastewater inlet pipe to the liquid injection pump, wherein the liquid injection pump is connected with the liquid to be treated; one end of a water outlet pipe is connected with a liquid outlet of the reactor, and the other end of the water outlet pipe is connected with a liquid storage tank; starting a liquid injection pump, and allowing wastewater to flow through the liquid distributor along a wastewater inlet pipe under the action of the liquid injection pump and continuously enter water in an upflow channel in an upflow water inlet mode;
e. after the reactor operates for 20-60min, the power supply is turned off, and the purified water is discharged from the liquid outlet of the reactor to the liquid storage tank through the water outlet pipe.
Optionally, the wastewater enters the reactor through the liquid distributor at a flow rate of 1.5-5.0L/min, and the temperature in the reactor is maintained below 75 ℃ to prevent evaporation of water.
Compared with the prior art, the invention has the beneficial technical effects that:
1. according to the fluidized bed device, the graphene macroscopic body is compounded with the photocatalytic material, so that the fluidized bed device has a large specific surface area, remarkable adsorption performance and good carrier transport capacity, ozone degradation is combined, trace BPS in a water body is enriched by adsorption by utilizing an adsorption-photocatalysis synergistic effect to improve photocatalytic degradation efficiency, occupied adsorption sites are released while pollutants are degraded by photocatalysis, the trace BPS is enriched again, micro/trace pollutants are effectively removed, and the fluidized bed device is green, efficient, low in overall cost, and the graphene macroscopic body is compounded with the photocatalytic material and has the advantage of easiness in recovery.
2. The reactor of the invention is provided with microwave assistance, which improves the activity and degradation rate of the photocatalyst and is beneficial to industrialization.
3. The light source device can provide irradiation light with an included angle range of 0 degrees & lt theta & lt 90 degrees between the incident direction and the central axis of the reactor in the reactor, can provide an effective light source in the reactor, and is favorable for the transmission of light in the reactor by arranging the reflecting surface on the inner wall of the reactor, so that the utilization rate of the light source is high.
4. The photocatalytic-ozone combined fluidized bed purification device provided by the invention is characterized in that a controller is introduced, so that automatic control can be effectively realized, the labor cost is reduced, the treatment effect is improved, and high-concentration organic wastewater pollutants which are difficult to degrade can be catalytically degraded by combining a photocatalyst and an ozone generator.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic view of a combined photocatalytic-ozone fluidized bed purification apparatus according to one embodiment of the present invention;
FIG. 2 is a schematic view of a purified water outlet of a photocatalytic-ozone fluidized bed purification apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a wastewater inlet of a photocatalytic-ozone combined fluidized bed purification apparatus according to an embodiment of the present invention;
description of reference numerals: 1-an aeration disc; 2-a reactor; 21-a purified water outlet; 211-liquid distributor one; 22-a wastewater inlet; 221-liquid distributor two; 3-a light source device; 4-a photocatalyst filler; 5-ozone bubbling; 6-connecting pipe; 7-ozone generator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, devices, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, devices, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.
FIG. 2 shows a photocatalytic-ozone combined fluidized bed purification apparatus and a method for using the same according to one embodiment of the present invention, which is described in the following embodiments according to FIGS. 1-3:
the first embodiment is as follows:
the embodiment provides a photocatalytic-ozone combined fluidized bed purification device, which comprises a reactor; one side of the reactor is connected with a purified water outlet and a connecting pipe, and a first liquid distributor is arranged at the joint of the purified water outlet and the reactor; the reactor is provided with a wastewater inlet, and a liquid distributor II is arranged at the joint of the wastewater inlet and the reactor; an aeration disc is arranged at the bottom of the reactor; the reactor is internally provided with a light source device, photocatalyst filler and a guide cylinder with openings at two ends, the light source device can provide irradiation light with an included angle range of 0 degrees < theta < 90 degrees between an incident direction and the central axis of the reactor in the reactor, and the guide cylinder is internally provided with an upflow channel communicated with the openings at two ends.
Optionally, the first liquid distributor and the second liquid distributor are screens, and the first liquid distributor and the second liquid distributor are detachably mounted on the side wall of the reactor; the light source device is composed of a lamp tube and a lamp tube base, the lamp tube base is installed at the middle end in the reactor, the lamp tube is connected to the lamp tube base, the lamp tube comprises simulated sunlight, a xenon lamp and an ultraviolet lamp, and a glass window corresponding to the light source device is arranged on the side face of the reactor.
In this embodiment, a loading cylinder is installed in the reactor, the photocatalyst filler is installed in the loading cylinder, and the photocatalyst filler includes a graphene macroscopic body; the inner wall of the reactor is provided with a reflecting surface of the irradiation light.
In addition, the embodiment also provides a use method of the photocatalytic-ozone combined fluidized bed purification device, which comprises the following steps:
a. recovering collected wastewater, and adding a pH agent into the wastewater to ensure that the pH value in the wastewater is between 2 and 10;
b. installing a graphene macroscopic body in a loading cylinder, then installing the graphene macroscopic body in the reactor, and then irradiating the inside of the reactor for 10-25min by using a light source with the wavelength of 254-365 nm and the power of 12-40W;
c. connecting an ozone generator to a connecting port of the ozone generator through a pipeline, starting the ozone generator, and blowing ozone into a reactor;
d. connecting one end of a wastewater inlet pipe to the liquid inlet of the reactor and abutting against the liquid distributor, and connecting the other end of the wastewater inlet pipe to the liquid injection pump, wherein the liquid injection pump is connected with the liquid to be treated; one end of a water outlet pipe is connected with a liquid outlet of the reactor, and the other end of the water outlet pipe is connected with a liquid storage tank; starting a liquid injection pump, allowing wastewater to flow through the liquid distributor along a wastewater inlet pipe under the action of the liquid injection pump, allowing the wastewater to flow into the reactor through the liquid distributor at a flow rate of 1.5-5.0L/min, and continuously feeding water in an upflow channel in an upflow water feeding manner;
e. keeping the temperature in the reactor below 75 ℃, turning off the power supply after the reactor operates for 20-60min, and discharging the purified water from the liquid outlet of the reactor to the liquid storage tank through the water outlet pipe.
Example two:
the embodiment provides a photocatalytic-ozone combined fluidized bed purification device, which comprises a reactor; one side of the reactor is connected with a purified water outlet and a connecting pipe, and a first liquid distributor is arranged at the joint of the purified water outlet and the reactor; the reactor is provided with a wastewater inlet, and a liquid distributor II is arranged at the joint of the wastewater inlet and the reactor; an aeration disc is arranged at the bottom of the reactor; the reactor is internally provided with a light source device, photocatalyst filler and a guide cylinder with openings at two ends, the light source device can provide irradiation light with an included angle range of 0 degrees < theta < 90 degrees between an incident direction and the central axis of the reactor in the reactor, and the guide cylinder is internally provided with an upflow channel communicated with the openings at two ends.
The first liquid distributor and the second liquid distributor are screens.
The waste water inlet is connected with a waste water inlet pipe, the waste water inlet pipe is provided with a first valve, the purified water outlet can be connected with a water outlet pipe, the water outlet pipe is provided with a second valve, and a third valve is arranged on a pipeline for connecting the liquid injection pump and the liquid to be treated.
The photocatalytic-ozone combined fluidized bed purification device also comprises a temperature sensor for receiving the temperature of liquid in the reactor; the heating device is used for heating the reactor; a microwave assist device for providing microwave assist; a programmable logic controller for controlling the heater to heat, controlling the microwave auxiliary device to open, controlling the reactor to open, controlling the ozone generator to open, controlling the first valve, the second valve and the third valve to open, and the controller is connected with the temperature sensor, the heating device, the microwave auxiliary device, the reactor, the ozone generator, the first valve, the second valve and the third valve by signals, and is written into the control program of the respective operation period periods of the temperature sensor, the heating device, the microwave auxiliary device, the reactor, the ozone generator, the first valve, the second valve and the third valve in the photocatalytic-ozone combined fluidized bed purification device by software function, according to the operation period, the temperature sensor, the heating device, the microwave auxiliary device, the reactor, the ozone generator, the first valve, the second valve and the third valve can realize an automatic opening function, and the treatment efficiency is improved.
In addition, the controller can be in signal connection with an online water quality detector, the water quality detector is arranged on a water inlet channel of the liquid injection pump and is used for testing the concentration of the liquid to be tested every 10min, the water quality detector is used for detecting and feeding back the detected concentration information of the liquid to be tested to the controller, and the controller is used for controlling and adjusting the first valve, the heating device, the microwave auxiliary device, the reactor and the ozone generator, such as controlling the opening degree of the first valve, so as to control the upflow speed of the treated liquid; controlling the heating device so as to adjust the temperature in the reactor and obtain a better treatment temperature; controlling the microwave auxiliary device to generate certain microwave assistance in the reactor; the ozone generator is controlled to adjust the input of ozone in the reactor.
Therefore, in this embodiment, the controller includes a central control module, configured to receive temperature information obtained by the temperature sensor, receive output information of ozone in the ozone generator, receive microwave frequency information, receive upflow velocity information of the liquid to be treated in the first valve, and receive water quality information detected by the water quality detector; the information processing module is used for processing the temperature information, the microwave frequency information, the ozone output information, the upflow information and the water quality information so as to obtain temperature information to be adjusted, microwave frequency information to be adjusted, ozone output information to be adjusted and upflow information to be adjusted after analysis and treatment, and the temperature information, the microwave frequency information to be adjusted, the ozone output information to be adjusted and the upflow information to be adjusted are transmitted to the central control module through signal connection; the storage module is used for storing the temperature information, the microwave frequency information, the ozone output information, the upwelling information, the water quality information, the temperature information to be adjusted, the microwave frequency information to be adjusted, the ozone output information to be adjusted and the upwelling information to be adjusted after analysis and treatment in the information processing module; and the central control module receives temperature information to be adjusted, microwave frequency information to be adjusted, ozone output information to be adjusted and upflow information to be adjusted and then sends control instructions of temperature adjustment, microwave frequency adjustment, ozone output information adjustment and upflow information adjustment.
Wherein the liquid distributor is a screen, and the liquid distributor is detachably arranged on the side wall of the reactor; the light source device is composed of a lamp tube and a lamp tube base, the lamp tube base is installed at the middle end in the reactor, the lamp tube is connected to the lamp tube base, the lamp tube comprises simulated sunlight, a xenon lamp and an ultraviolet lamp, and a glass window corresponding to the light source device is arranged on the side face of the reactor.
The temperature sensor and the microwave auxiliary device are installed on the inner wall of the reactor.
In this embodiment, a loading cylinder is installed in the reactor, the photocatalyst filler is installed in the loading cylinder, and the photocatalyst filler includes a graphene macroscopic body; the inner wall of the reactor is provided with a reflecting surface of the irradiation light.
The photocatalytic filler comprises the following components in parts by weight: 5-12 parts of titanium dioxide, 1-10 parts of polyacrylic acid, 15-28 parts of graphene macroscopic body and 2-7 parts of zinc oxide.
The preparation method of the photocatalytic filler comprises the following steps:
1) weighing titanium dioxide, polyacrylic acid, a graphene macroscopic body and zinc oxide according to the weight part ratio;
2) mixing the weighed titanium dioxide and zinc oxide into a stirring kettle, starting a ball milling part in the stirring kettle, ball milling the mixture of the titanium dioxide and the zinc oxide until the particle size is 110 nm-150 nm, closing the ball milling part, adding polyacrylic acid and a graphene macroscopic body, and performing ultrasonic treatment for 10-30min to obtain a mixture A;
3) heating the temperature in the stirring kettle to 45-80 ℃ at the heating rate of 2-5 ℃/min, keeping the temperature at 90-150 ℃, continuously stirring for 1-3h, and then drying at the temperature of 100-120 ℃ for 20-30min to obtain a dried mixture;
4) the dried mixture is crushed and ground to obtain the photocatalyst filler with the particle size of 15-25mm and the density of 850-1200 Kg/m.
In addition, the embodiment also provides a use method of the photocatalytic-ozone combined fluidized bed purification device, which comprises the following steps:
a. recovering collected wastewater, and adding a pH agent into the wastewater to ensure that the pH value in the wastewater is between 2 and 10;
b. installing a graphene macroscopic body in a loading cylinder, then installing the graphene macroscopic body in the reactor, and then irradiating the inside of the reactor for 10-25min by using a light source with the wavelength of 254-365 nm and the power of 12-40W;
c. connecting an ozone generator with a generator through a connecting pipeline, starting the ozone generator, and blowing ozone into the reactor to enable the interior of the reactor to have rising ozone bubbles;
d. one end of a wastewater inlet pipe is connected with a wastewater inlet of the reactor and is abutted against the second liquid distributor, the other end of the wastewater inlet pipe is connected with the liquid injection pump, and the liquid injection pump is connected with the liquid to be treated through a pipeline; one end of a purified water outlet is connected with the reactor, and the other end of the purified water outlet is connected with the liquid storage tank through a pipeline; starting a liquid injection pump, allowing wastewater to flow through the liquid distributor along a wastewater inlet pipe under the action of the liquid injection pump, allowing the wastewater to flow into the reactor through the liquid distributor at a flow rate of 1.5-5.0L/min, and continuously feeding water in an upflow channel in an upflow water feeding manner;
e. keeping the temperature in the reactor below 75 ℃, turning off the power supply after the reactor operates for 20-60min, and discharging the purified water from the liquid outlet of the reactor to the liquid storage tank through the water outlet pipe.
In sum, the fluidized bed device has obvious degradation effect, effectively removes micro/trace pollutants, is green and efficient, and has low overall cost.
Comparative example one:
the only difference from example 2 is that no ozone was applied.
Comparative example two:
the difference from example 2 is only that the graphene macrosome is not used as the composite component of the photocatalytic filler.
Comparative example three:
the difference from the embodiment 2 is only that a controller and a temperature sensor are not introduced.
Comparative example four:
the difference from the embodiment 2 is that the incidence angle of the light source device is larger than 90 degrees, and no reflecting surface is arranged.
The sewage purification tests were performed on the purification apparatuses purchased in examples one, two, comparative examples one to four and the market, and the purification results are recorded in the following table 1: in this case, a commercially available purification apparatus was used as a control group.
TABLE 1
It should be noted that: the first stage refers to that no pollutant is detected in the sewage, the second stage refers to that a slight pollutant is detected in the sewage, and the third stage refers to that more pollutants are detected in the sewage. The decontamination efficiency is the total time required for treating sewage when a water quality detector detects that no pollutant appears in the sewage, the high efficiency means the shortest total time for treating the sewage in the same volume, the general total time for treating the sewage in the same volume is between the shortest and the longest, and the difference means the longest time for treating the sewage in the same volume. Analysis in the table shows that the ozone introduction amount, the graphene macroscopic body and the light incidence angle in the light source device in the invention all affect the sewage treatment condition, and the lack of any one condition affects the treatment result of the invention. In addition, the combined use of photocatalysis and ozone is arranged, and the decontamination efficiency can be promoted under the condition of a controller.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the apparatus, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, devices may be executed in a different order than depicted, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, e.g., well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (8)
1. A photocatalysis-ozone combined fluidized bed purification device is characterized by comprising a reactor; one side of the reactor is connected with a purified water outlet and a connecting pipe, the connecting pipe can be connected with an ozone generator, and a first liquid distributor is arranged at the joint of the purified water outlet and the reactor; the reactor is provided with a wastewater inlet, and a liquid distributor II is arranged at the joint of the wastewater inlet and the reactor; an aeration disc is arranged at the bottom of the reactor; the reactor is internally provided with a light source device, photocatalyst filler and a guide cylinder with openings at two ends, the light source device can provide irradiation light with an included angle range of 0 degrees < theta < 90 degrees between an incident direction and the central axis of the reactor in the reactor, and the guide cylinder is internally provided with an upflow channel communicated with the openings at two ends.
2. The combined photocatalytic-ozone fluidized bed purification device as claimed in claim 1, wherein the first liquid distributor and the second liquid distributor are screens.
3. The combined photocatalytic-ozone fluidized bed purification device as claimed in claim 1, wherein the light source device comprises a lamp tube and a lamp tube base, the lamp tube base is installed at the inner middle end of the reactor, the lamp tube is connected to the lamp tube base, and the lamp tube comprises simulated sunlight, a xenon lamp and an ultraviolet lamp.
4. The combined photocatalytic-ozone fluidized bed purification device as claimed in claim 1, wherein a glass window corresponding to the light source device is arranged on the side surface of the reactor.
5. The combined photocatalytic-ozone fluidized bed purification device as claimed in claim 1, wherein a loading cylinder is installed in the reactor, the photocatalyst filler is installed in the loading cylinder, and the photocatalyst filler comprises graphene macroscopic bodies.
6. The combined photocatalytic-ozone fluidized bed purification device as claimed in claim 1, wherein the inner wall of the reactor is provided with a reflection surface for the irradiated light.
7. A method for using the photocatalytic-ozone combined fluidized bed purification device as defined in any one of claims 1 to 6, comprising the steps of:
a. recovering collected wastewater, and adding a pH agent into the wastewater to ensure that the pH value in the wastewater is between 2 and 10;
b. installing a graphene macroscopic body in a loading cylinder, then installing the graphene macroscopic body in the reactor, and then irradiating the inside of the reactor for 10-25min by using a light source with the wavelength of 254-365 nm and the power of 12-40W;
c. connecting an ozone generator with the reactor through a connecting pipeline, starting the ozone generator, and blowing ozone into the reactor;
d. one end of a wastewater inlet pipe is connected with a wastewater inlet of the reactor and is abutted against the second liquid distributor, the other end of the wastewater inlet pipe is connected with a liquid injection pump, and wastewater flows through the second liquid distributor along the wastewater inlet pipe under the action of the liquid injection pump and continuously enters water in an upflow channel in an upflow water inlet mode;
e. and after the reactor operates for 20-60min, the power supply is turned off, and purified water flows through the first liquid distributor and is discharged from a purified water outlet of the reactor.
8. The use method of the combined photocatalytic-ozone fluidized bed purification device as claimed in claim 7, wherein the wastewater enters the reactor through the second liquid distributor at a flow rate of 1.5-5.0L/min, and the temperature in the reactor is kept below 75 ℃ to prevent evaporation of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010148306.7A CN111320299A (en) | 2020-03-05 | 2020-03-05 | Photocatalytic-ozone combined fluidized bed purification device and use method thereof |
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Application publication date: 20200623 |