CN114772678A - Cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device, system and method - Google Patents
Cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device, system and method 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/02—Fluid flow conditions
- C02F2301/026—Spiral, helicoidal, radial
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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
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
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Abstract
A cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device, system and method comprises a spiral hollow tubular photocatalytic oxidation reactor, wherein one end of the reactor is provided with a medium inlet, the other end of the reactor is provided with a medium outlet, and a medium enters from the inlet and flows out from the outlet to be in a continuous flow state; the medium contains a photocatalyst and an oxidant; the tubular photocatalytic oxidation reactor is characterized in that a photocatalytic light source is sleeved in the spiral hollow cavity of the tubular photocatalytic oxidation reactor, and the length of the photocatalytic light source is not shorter than the height of the photocatalytic oxidation reactor. The scheme of this application has realized online concerted photocatalytic degradation and chemical advanced oxidative degradation to adopt ultraviolet initiation chemical advanced oxidative reaction, compare with traditional static sequencing batch formula single external illumination formula photocatalytic degradation and single chemical advanced oxidative degradation water treatment method and promoted photoelectricity utilization ratio, enlarged water treatment range by a wide margin, improved photocatalytic oxidative degradation water treatment capacity.
Description
Technical Field
The invention belongs to the technical field of water pollution control and treatment, and particularly relates to a cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device, system and method.
Background
Along with the rapid development of modern industry, agriculture and social life, a large amount of refractory industry, agriculture and waste water and domestic waste water containing toxic, harmful, inorganic and organic pollutants are generated, and the treatment and the standard reaching discharge or utilization are urgently needed.
The advanced oxidation technology has strong oxidation capacity and simple implementation, has good applicability to various waste liquids, particularly high-concentration wastewater difficult to be biochemically degraded, activates an oxidant under the reaction conditions of high temperature and high pressure, electricity, sound, light irradiation, heavy metal catalysts and the like to initiate generation of strong oxidation species such as hydroxyl, peroxy radicals, singlet oxygen, sulfate radicals and the like, indiscriminately oxidizes organic matters into low-toxicity or non-toxic small molecular matters, can completely mineralize or decompose most of the organic matters, and is a hotspot and a key point of current research in an environment-friendly oxidant activation method.
The photocatalytic degradation technology is driven by light as an energy source, and pollutants and active oxidation substances such as catalyst photo-generated electrons, holes, hydroxyl free radicals, peroxy radicals and the like are subjected to a series of oxidation-reduction reactions to realize degradation. Compared with the traditional physical, chemical and biological methods, the method has the characteristics of greenness, safety, low energy consumption and the like, and the photocatalytic degradation treatment of pollutants becomes a research hotspot in the field of environmental pollution treatment. The external illumination type photocatalytic degradation is the most common realization mode, but the external illumination type light energy utilization rate is low, particularly the external illumination of an artificial light source is easy to cause light pollution and ultraviolet light damage, and the development of the internal illumination type photocatalytic degradation technology is necessary for improving the light energy utilization rate.
The photocatalytic reactor is an important component for realizing photocatalytic degradation application, a static sequencing batch photocatalytic degradation mode adopted by the current mainstream is large in occupied space, multiple in operation links, low in light energy utilization rate and weak in treatment capacity, and the treatment capacity of photocatalytic degradation water is limited.
The city is the concentrated district that produces waste water, and waste water output is big, and the emission requires highly, and water treatment ability requires with increasing day, and city main energy electric energy supply is nervous simultaneously, day and night consumes unbalance, provides huge challenge for power generation enterprise and electric wire netting power supply, with millet electricity drive artifical ultraviolet light catalytic oxidation degradation treatment city production domestic waste water, for the consumption and the environmental improvement of surplus electric power at night provide a reliable solution.
Disclosure of Invention
The utility model provides a to the above-mentioned not enough of prior art, provide a cylinder screwed pipe formula continuous flow-photocatalytic oxidation degradation water treatment facilities of online while photocatalytic degradation and chemical advanced oxidative degradation realize waste water continuous flow photocatalytic oxidation degradation.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: a cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device comprises a spiral hollow tubular photocatalytic oxidation reactor, wherein one end of the tubular photocatalytic oxidation reactor is provided with a medium inlet, the other end of the tubular photocatalytic oxidation reactor is provided with a medium outlet, and a medium enters from the inlet and flows out from the outlet to be in a continuous flow state; the medium contains a photocatalyst and an oxidant; the tubular photocatalytic oxidation reactor is characterized in that a photocatalytic light source is sleeved in a spiral hollow cavity of the tubular photocatalytic oxidation reactor, and the length of the photocatalytic light source is not shorter than the height of the photocatalytic oxidation reactor (namely the spiral height of the spiral photocatalytic oxidation reactor).
Furthermore, the photocatalytic light source is a columnar ultraviolet light source lamp.
Further, tubular photocatalytic oxidation reactor be by the hollow cylindrical spiral solenoid of spiral that hollow pipeline spiral winding formed, the hollow cavity internal diameter 2 ~ 20cm of the hollow chamber of spiral hollow solenoid (put the lamp place, according to the diameter adaptation of lamp), the internal diameter of hollow pipeline is 3 ~ 100mm, the wall thickness is 1 ~ 10 mm.
Furthermore, the cylindrical solenoid catalytic oxidation reactor is prepared from one or more of quartz glass, common silicate glass, polyethylene, polypropylene, polycarbonate, polyethylene terephthalate and polystyrene.
Furthermore, the oxidant used in the photocatalytic oxidation is one of hydrogen peroxide, ozone, potassium persulfate and sodium persulfate solution, or one of ozone, oxygen and air gas.
Further, the spiral angle of the spiral winding of the tubular photocatalytic oxidation reactor is 1-20 degrees, and preferably 3-5 degrees; by adopting the arrangement, the compactness of the spiral pipe can be improved, the flowing property can be improved, the better catalytic oxidation effect can be realized, and the ultraviolet light source can be more efficiently utilized.
The application also provides a photocatalytic oxidation degradation system comprising the cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device, the system comprises a premixer arranged at a medium inlet of a cylindrical solenoid type photocatalytic oxidation reactor, the premixer is respectively connected with a raw water catalyst suspension container and an oxidant (liquid or gas) container through pipelines, and the pipeline is also provided with a sample injection pump; the medium outlet of the tubular photocatalytic oxidation reactor is connected with an output pipeline, and a columnar ultraviolet light source lamp is sleeved in the tubular photocatalytic oxidation reactor.
By adopting the structure, the raw water catalyst suspension can be prepared and mixed in advance and then mixed with the oxidant (liquid or gas) before entering the tubular photocatalytic oxidation reactor, the arrangement is more flexible, the concentration and flow of the raw water suspension and the oxidant are convenient to regulate and control, the performances of the photocatalyst and the oxidant can be fully utilized, and the effective photocatalytic oxidation degradation of the raw water can be realized.
The invention also discloses a water treatment method by utilizing the cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device system, which comprises the following steps:
(1) mixing raw water to be degraded with a photocatalyst and an oxidant according to the characteristics of the raw water and the effluent index requirements to obtain a mixed solution;
(2) then introducing the mixed liquid from the inlet of the tubular photocatalytic oxidation reactor, keeping the mixed liquid continuously flowing in the tubular photocatalytic oxidation reactor, and leading out the mixed liquid from the outlet; in the process, the ultraviolet light source lamp is always in an open state to continuously illuminate the tubular photocatalytic oxidation reactor.
Further, the step (1) of mixing the raw water to be degraded with the photocatalyst and the oxidant to obtain a mixed solution specifically comprises: adding a photocatalyst into raw water, stirring and dispersing to obtain a photocatalyst suspension, conveying the photocatalyst suspension and an oxidant into a premixer through a sample injection pump, mixing, and allowing the mixed solution to flow into a tubular photocatalytic oxidation reactor for continuous flow oxidation degradation under the irradiation of an internal ultraviolet lamp.
Further, the catalyst is ZnO, ZnS or TiO2、WO3、CdS、CdO、Fe2O3、Bi2O3、SiC、g-C3N4And transition metal element doping thereof, Fe3O4And one of the single or combined modified micro-nano particles is magnetically loaded.
Furthermore, the addition amount of the photocatalyst is 0.1-10.0 g/L, the concentration of the oxidant is 1-100 mmol/L, and the gas-liquid ratio of the oxidizing gas is 1/100-1/1; the flow velocity of the medium in the tubular photocatalytic oxidation reactor is 1-10000 mL/min.
Furthermore, the cylindrical spiral tube type photocatalytic oxidation reactor and the ultraviolet light source lamp are vertically or horizontally arranged in the water treatment process.
The invention has the advantages and beneficial effects that:
1. the cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device has the advantages of simple and compact structure, simple and easily obtained materials, low space requirement, high utilization rate and easiness in erection.
2. According to the cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device, the inner diameter of a pipeline (a hollow pipeline is formed in the tubular photocatalytic oxidation reactor and is spirally wound to form a spiral hollow solenoid type structure, and the inner diameter of the spiral hollow pipeline is the inner diameter of the hollow pipeline) of the tubular photocatalytic oxidation reactor is 3-100 mm, and the wall thickness of the spiral hollow solenoid type structure is 1-10 mm; the inner diameter (where the lamp is placed) of a spiral hollow cavity of the tubular photocatalytic oxidation reactor is adapted according to the diameter of the lamp, and the preferred length of the inner diameter can be 2-20 cm; the transmission depth of light in the suspension liquid is close to that of light under common conditions, the total length is adjustable, and the light energy utilization efficiency is greatly improved by matching with a compact layout.
3. According to the cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device, the ultraviolet lamp is arranged in the cylindrical spiral tube cavity to irradiate, artificial ultraviolet light is generated, the electro-optic conversion efficiency is high, the irradiation range is effectively limited, the light energy utilization rate is greatly improved, and leakage is reduced.
4. The cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device takes ultraviolet light as a chemical advanced oxidation initiator, is direct, efficient, low-carbon and clean, avoids the need of high-temperature and high-pressure conditions and the use of heavy metal catalysts in the traditional method, and reduces secondary pollution emission.
5. The cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device converts electric energy into light energy for environmental management, highly conforms to the urban night power consumption and wastewater treatment requirements, and provides a completely attractive solution for valley electricity utilization and urban environmental management.
6. The cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment method realizes continuous water inlet treatment, is simple to operate, has small workload, realizes continuous flow degradation of wastewater, and improves the water treatment capacity and efficiency.
7. The cylindrical solenoid type continuous flow-photocatalytic oxidative degradation water treatment system realizes synergistic on-line simultaneous photocatalytic degradation and chemical advanced oxidative degradation, has simple control parameter feedback and optimization setting and strong complementarity, and reduces the operation difficulty of the device.
8. The cylindrical solenoid type continuous flow-photocatalytic oxidative degradation water treatment system has the advantages of simple and compact structure, cheap and easily-obtained materials, low space requirement, easy erection, convenient and controllable operation, high light energy utilization rate and wide water treatment capacity range, synergistically combines photocatalytic degradation and chemical advanced oxidative degradation, realizes continuous wastewater flow photocatalytic oxidative degradation, and effectively solves the key problem in research and application of photocatalytic oxidative degradation water treatment.
9. The whole set of processing system of this application specifically is: adding a photocatalyst into raw water, stirring and dispersing the raw water into a suspension, conveying the suspension and an oxidant through a sample injection pump, flowing into a premixer, mixing, flowing the mixed solution into a cylindrical spiral linear tubular reactor, continuously flowing under the irradiation of an internal ultraviolet lamp, carrying out oxidative degradation, feeding back, optimizing and setting the photocatalyst type concentration, the oxidant type concentration, the flow rate and the light source intensity according to the characteristics of the raw water and the water outlet index requirements, and carrying out precipitation, filtration, centrifugation or magnetic field recovery on the photocatalyst in the treated waste liquid for reuse.
10. The structural device is a degradation treatment type design with large inner diameter, long size, large capacity and one-way circulation, and is a simultaneous integrated synergistic degradation treatment mode of photocatalytic degradation and chemical advanced oxidation; the prior art only has a micro quartz coil single photocatalytic reactor for analysis, and the reactor has the advantages of small pipe diameter and small capacity, an ultraviolet lamp is loose in the coil and needs water cooling, and the digestion rate needs to be improved by matching ultrasonic reinforcement and internal circulation; compared with the prior art, the method has the advantages of simpler process, large treatment capacity and no need of matching ultrasonic reinforcement and internal circulation to improve the digestion rate.
Drawings
FIG. 1 is a schematic structural diagram of a cylindrical solenoid type continuous flow-photocatalytic oxidation degradation water treatment device of the present invention.
FIG. 2 is a schematic structural diagram of a catalytic oxidation degradation system of the continuous flow-photocatalytic oxidation degradation water treatment device.
As shown in fig. 1: 1. a tubular photocatalytic oxidation reactor (cylindrical spiral tubular photocatalytic oxidation reactor), 11 a medium inlet, 12 a medium outlet, 2 a light source and 3 a raw water catalyst suspension container; 4. oxidant (liquid or gas) container, 5. sample injection pump, 6. premixer.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1, a cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device comprises a spiral hollow tubular photocatalytic oxidation reactor 1, wherein one end of the tubular photocatalytic oxidation reactor 1 is provided with a medium inlet 11, the other end of the tubular photocatalytic oxidation reactor 1 is provided with a medium outlet 12, and a medium enters from the inlet and flows out from the outlet in a continuous flow state; the medium contains a photocatalyst and an oxidant; the spiral hollow cavity of the tubular catalytic oxidation reactor 1 is sleeved with a photocatalytic light source 2, and the length of the photocatalytic light source 2 is not shorter than the height of the photocatalytic oxidation reactor 1 (namely the height after the spiral winding).
The photocatalytic light source 2 described in the present application is, for example, a columnar ultraviolet light source lamp.
By way of example, the cylindrical spiral tubular photocatalytic oxidation reactor is made of a light-transmitting material composed of one or more of quartz glass, common silicate glass, polyethylene, polypropylene, polycarbonate, polyethylene terephthalate and polystyrene.
The photocatalytic oxidation described herein uses, as an example, one of hydrogen peroxide, ozone, potassium persulfate, and sodium persulfate solutions, or one of ozone, oxygen, and air gas.
By way of example, further, the inner diameter of the cylindrical spiral tubular photocatalytic oxidation reactor pipe is 3-100 mm (namely a hollow pipe forming the reactor), and the wall thickness is 1-10 mm; the inner diameter (lamp placing place) of the spiral hollow cavity of the tubular photocatalytic oxidation reactor is adapted according to the diameter of the lamp, and the optimal length of the spiral hollow cavity is 2-20 cm.
As shown in fig. 2, the present application further provides a photocatalytic oxidation degradation system comprising the above cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device, the system comprises a pre-mixer 6 disposed at the medium inlet 11 of the tubular photocatalytic oxidation reactor 1, the pre-mixer 6 is connected with a raw water catalyst suspension container 3 and an oxidant (liquid or gas) container 4 through a pipeline, the pipeline is further provided with a sample injection pump 5; the medium outlet 12 of the tubular photocatalytic oxidation reactor 1 is connected with an output pipeline, and the tubular photocatalytic oxidation reactor 1 is internally sleeved with a columnar ultraviolet light source lamp 2.
By adopting the structure, the catalyst suspension can be prepared and mixed in advance, and then is mixed with the oxidant (liquid or gas) before entering the tubular catalytic oxidation reactor.
The photocatalyst is ZnO, ZnS or TiO2、WO3、CdS、CdO、Fe2O3、Bi2O3、SiC、g-C3N4And transition metal element doping thereof, Fe3O4Carrying one of single or combined modified micro-nano particles by magnetic loading; comprises (1) ZnO, ZnS and TiO2、WO3、CdS、CdO、Fe2O3、Bi2O3、SiC、g-C3N4Any monomer, or any monomer as shell, Fe3O4A core-shell structured photocatalyst formed for the inner core; (2) transition metal element doped ZnO, ZnS, TiO2、WO3、CdS、CdO、Fe2O3、Bi2O3、SiC、g-C3N4One of the formed doped photocatalysts or any one of the doped photocatalysts is a shell and Fe3O4A core-shell structured photocatalyst formed for an inner core.
The addition amount of the photocatalyst is 0.1-10.0 g/L, the concentration of the oxidant is 1-100 mmol/L, and the gas-liquid ratio of the oxidizing gas is 1/100-1/1; the flow velocity of the medium in the tubular photocatalytic oxidation reactor is 1-10000 mL/min.
The added amount concentration of the photocatalyst in the present application is the content concentration in raw water (water to be catalytically oxidatively degraded), and the oxidant concentration is the concentration after mixing with raw water containing the photocatalyst. The concentration of the oxidant during actual degradation is not required to be too high, so the flow rate of the oxidant during mixing is much lower than that of wastewater, the concentration of the photocatalyst added into raw water is basically unchanged and is expressed as the adding amount, and the concentration of the oxidant diluted by many times is expressed as the concentration after mixing and dilution.
Example 1:
the reactor of this example is a cylindrical helical linear tubular photocatalytic oxidation reactor made of highly transparent quartz glass, the helical tube is tightly wound with a helical angle of 5 °, the diameter of the inner cavity (hollow cavity, place for placing the lamp) of the helical tube is 25mm, the inner diameter of the tube is 5mm, the wall thickness is 1mm, the total length is 50cm, the ambient temperature is 30 ℃, the light source of the inner cavity is a 10W ultraviolet lamp, the dominant wavelength is 254nm, 10 μmol/L rhodamine B solution is used as the simulated waste liquid, and Ce is doped with TiO2The nanoparticles are a photocatalyst (commercially available or obtained by a conventional doping process, the same is applied to the following examples), the dosage is 1.0g/1000mL, the concentration of oxidant hydrogen peroxide is 10mmol/L, the degradation rate is calculated by measuring the concentration of inlet and outlet liquid by a spectrophotometry, the degradation rate is 99.5% at a flow rate of 20.0mL/min, and the degradation rate is 92.3% at a flow rate of 30.0 mL/min.
The degradation rates of the hydrogen peroxide under the other conditions of 0mmol/L and the ultraviolet lamp are respectively 62.1 percent and 56.3 percent, and the degradation rates of the hydrogen peroxide under the other conditions of 15.8 percent and 10.3 percent.
The degradation rate formula of the present application is shown in the following formula (the same is applied to the following examples),
wherein eta is the degradation rate;
cothe concentration of rhodamine B in the effluent liquid;
ciis the influent rhodamine B concentration.
The above examples fully illustrate that the devices of the present application exhibit different degradation rates with photocatalysis alone and both photocatalysis and oxidant.
Example 2:
the reactor of this embodiment is cylindrical helix linear tubular photocatalytic oxidation reactor, and the material is high printing opacity quartz glass, and the helix closely twines, helix angle 5, helix lumen inner chamberThe diameter is 25mm, the inner diameter of the pipeline is 5mm, the wall thickness is 1mm, the total length is 50cm, the environmental temperature is 30 ℃, an inner cavity light source is a 10W ultraviolet lamp, the dominant wavelength is 254nm, 10 mu mol/L rhodamine B simulation waste liquid is prepared by using Fe3O4The Ce-doped ZnO magnetic core-shell type nanoparticle serving as the core is a photocatalyst, the adding amount is 1.0g/1000mL, the concentration of potassium persulfate is 10mmol/L, the degradation rate is calculated by measuring the concentration of inlet and outlet liquid by a spectrophotometry, the degradation rate is 97.4% at the flow rate of 30.0mL/min, the magnetic recovery catalyst is repeatedly used for degradation, and the degradation rate is 95.1% under the same condition.
Example 3:
a cylindrical spiral linear tubular catalytic oxidation reactor is made of high-light-transmittance quartz glass, a spiral tube is tightly wound, the spiral angle is 5 degrees, the diameter of an inner cavity of the spiral tube is 25mm, the inner diameter of a pipeline is 3mm, the wall thickness is 1mm, the total length is 50cm, the ambient temperature is 30 ℃, the light source of the inner cavity is a 10W ultraviolet lamp, a main wavelength of 254nm and a 102.1mg/L dimethyl phthalate solution are used as simulated waste liquid, and La-doped TiO is adopted for the reactor to be used for simulating the waste liquid2The adding amount of the photocatalyst is 1.0g/1000mL, the concentration of potassium persulfate is 10mmol/L, the concentration is measured by a spectrophotometry, and the degradation rate is 95.3 percent when the flow rate is 5.0 mL/min.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a cylindrical spiral tube formula continuous flow-light catalytic oxidation degradation water treatment facilities which characterized in that: the device comprises a spiral hollow tubular photocatalytic oxidation reactor, wherein one end of the tubular photocatalytic oxidation reactor is provided with a medium inlet, the other end of the tubular photocatalytic oxidation reactor is provided with a medium outlet, and a medium enters from the inlet and flows out from the outlet to be in a continuous flow state; the medium contains a photocatalyst and an oxidant; the spiral hollow cavity of the tubular photocatalytic oxidation reactor is internally sleeved with a photocatalytic light source, and the length of the photocatalytic light source is not shorter than the height of the photocatalytic oxidation reactor.
2. The cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device according to claim 1, characterized in that: the photocatalysis light source is a columnar ultraviolet light source lamp.
3. The cylindrical solenoid type continuous flow-photocatalytic oxidative degradation water treatment device according to claim 1, characterized in that: the tubular photocatalytic oxidation reactor is a spiral hollow cylindrical spiral solenoid formed by spirally winding a hollow pipeline, the inner diameter of a hollow cavity of the spiral hollow solenoid is 2-20 cm, the inner diameter of the hollow cavity of the spiral hollow solenoid is 3-100 mm, and the wall thickness of the hollow pipeline is 1-10 mm.
4. The cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device according to claim 1, characterized in that: the tubular photocatalytic oxidation reactor is prepared from one or more transparent materials consisting of quartz glass, common silicate glass, polyethylene, polypropylene, polycarbonate, polyethylene terephthalate and polystyrene.
5. The cylindrical spiral tube type continuous flow-photocatalytic oxidation degradation water treatment device according to claim 1, characterized in that: the oxidant adopted by the photocatalytic oxidation is one of hydrogen peroxide, ozone, potassium persulfate salt and sodium persulfate salt solution, or one of ozone, oxygen and air gas; the spiral angle of the spiral winding of the tubular photocatalytic oxidation reactor is 1-20 degrees.
6. A system comprising the cylindrical coil type continuous flow-photocatalytic oxidation degradation water treatment device according to any one of claims 1 to 5, characterized in that: the system comprises a premixer arranged at a medium inlet of a tubular photocatalytic oxidation reactor, wherein the premixer is respectively connected with a raw water catalyst suspension container and an oxidant container through pipelines, and the pipelines are also provided with sample injection pumps; the medium outlet of the tubular photocatalytic oxidation reactor is connected with an output pipeline, and a columnar ultraviolet light source lamp is sleeved in the inner cavity of the tubular photocatalytic oxidation reactor.
7. A method for treating water by cylindrical solenoid type continuous flow-photocatalytic oxidation degradation is characterized in that: the method comprises the following steps:
(1) mixing raw water to be degraded with a photocatalyst and an oxidant according to the characteristics of the raw water and the effluent index requirements to obtain a mixed solution;
(2) then introducing the mixed solution from the inlet of the tubular photocatalytic oxidation reactor, keeping the mixed solution continuously flowing in the tubular photocatalytic oxidation reactor, and leading out from the outlet; in the process, the ultraviolet light source lamp is always in an open state to continuously illuminate the tubular photocatalytic oxidation reactor.
8. The cylindrical solenoid type continuous flow-photocatalytic oxidative degradation water treatment method according to claim 7, characterized in that: mixing raw water to be degraded with a photocatalyst and an oxidant to obtain a mixed solution, specifically: adding a photocatalyst into raw water, stirring and dispersing the photocatalyst into a photocatalyst suspension, conveying the photocatalyst suspension and an oxidant through a sample injection pump, flowing the photocatalyst suspension and the oxidant into a premixer for mixing, and flowing the mixed solution into a tubular photocatalytic oxidation reactor for continuous flow photocatalytic oxidation degradation under the irradiation of an internal ultraviolet lamp.
9. The cylindrical solenoid type continuous flow-photocatalytic oxidative degradation water treatment method according to claim 8, characterized in that: the photocatalyst is ZnO, ZnS or TiO2、WO3、CdS、CdO、Fe2O3、Bi2O3、SiC、g-C3N4And transition metal element doping thereof, Fe3O4Carrying one of single or combined modified micro-nano particles by magnetic load; the addition amount of the photocatalyst is 0.1-10.0 g/L, and the concentration of the oxidant is 1-100mmol/L, and the gas-liquid ratio of the oxidizing gas is 1/100-1/1; the flow velocity of the medium in the tubular photocatalytic oxidation reactor is 1-10000 mL/min.
10. The cylindrical solenoid type continuous flow-photocatalytic oxidative degradation water treatment method according to claim 8, characterized in that: the tubular photocatalytic oxidation reactor and the ultraviolet light source lamp are vertically or horizontally arranged in the water treatment process.
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| CN202322427U (en) * | 2011-09-30 | 2012-07-11 | 吴彦霖 | Spiral pipe type light degrading device for pollutants |
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| CN104016511A (en) * | 2014-05-27 | 2014-09-03 | 轻工业环境保护研究所 | Ozone / photocatalysis oxidation-membrane separation integrated method and integrated set for advanced wastewater treatment |
| CN203890163U (en) * | 2014-05-27 | 2014-10-22 | 轻工业环境保护研究所 | Ozone/photocatalytic oxidation-membrane separation integrated device for advanced treatment of wastewater |
| CN110818015A (en) * | 2018-08-13 | 2020-02-21 | 中国石油化工股份有限公司 | Method for treating nitrobenzene wastewater by photocatalytic oxidation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202322427U (en) * | 2011-09-30 | 2012-07-11 | 吴彦霖 | Spiral pipe type light degrading device for pollutants |
| CN103523855A (en) * | 2013-10-15 | 2014-01-22 | 上海纳米技术及应用国家工程研究中心有限公司 | Supported photocatalytic degradation method and supported photocatalytic real-time on-line degradation device |
| CN104016511A (en) * | 2014-05-27 | 2014-09-03 | 轻工业环境保护研究所 | Ozone / photocatalysis oxidation-membrane separation integrated method and integrated set for advanced wastewater treatment |
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