CN114906907A - Pulse three-dimensional electrode wastewater treatment reactor - Google Patents
Pulse three-dimensional electrode wastewater treatment reactor Download PDFInfo
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- CN114906907A CN114906907A CN202210740337.0A CN202210740337A CN114906907A CN 114906907 A CN114906907 A CN 114906907A CN 202210740337 A CN202210740337 A CN 202210740337A CN 114906907 A CN114906907 A CN 114906907A
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 26
- 238000005273 aeration Methods 0.000 claims abstract description 39
- 239000002245 particle Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 230000008021 deposition Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000002604 ultrasonography Methods 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 30
- 239000002351 wastewater Substances 0.000 description 29
- 238000004043 dyeing Methods 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- GVFOJDIFWSDNOY-UHFFFAOYSA-N antimony tin Chemical compound [Sn].[Sb] GVFOJDIFWSDNOY-UHFFFAOYSA-N 0.000 description 3
- CJTCBBYSPFAVFL-UHFFFAOYSA-N iridium ruthenium Chemical compound [Ru].[Ir] CJTCBBYSPFAVFL-UHFFFAOYSA-N 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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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
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a pulse three-dimensional electrode wastewater treatment reactor. The pulse three-dimensional electrode wastewater treatment reactor comprises an electrolytic bath, an anode, a cathode, a particle electrode, a pulse power supply, an aeration device and an ultrasonic device; the lower part of the electrolytic bath is provided with a liquid inlet, and the upper part of the electrolytic bath is provided with a liquid outlet; the anode and the cathode are arranged in the electrolytic cell; the anode and the cathode are respectively connected with the anode and the cathode of the pulse power supply; the particle electrode is filled between the anode and the cathode; the aeration device introduces air into the electrolytic bath through the microporous aeration pipe; the ultrasonic device comprises an ultrasonic generator and an ultrasonic vibration rod, and the ultrasonic vibration rod is arranged in the electrolytic bath. The three-dimensional electrode is coupled with the ultrasound, and the ultrasound can strengthen mass transfer, clean the electrode and increase the yield of hydroxyl radicals, thereby enhancing the treatment effect; the pulse power supply is adopted to supply power to the electrolytic cell, so that the degradation efficiency and the current utilization efficiency are obviously improved, and the electric energy consumption is obviously reduced.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to a pulse three-dimensional electrode wastewater treatment reactor.
Background
The great negative impact of various waste waters on the ecological environment has attracted considerable attention. They are generally highly toxic, recalcitrant to biological degradation and potentially carcinogenic, and pose a significant environmental hazard. In recent years, the electrochemical oxidation method is widely applied to wastewater treatment as an advanced oxidation method, and compared with other methods, the electrochemical oxidation method has the advantages of high efficiency, easiness in operation, good environmental compatibility, high flexibility, wide adaptability and the like. However, the conventional two-dimensional electrode method is still limited in practical application due to low degradation efficiency and mass transfer limitation.
Aiming at the defect, Backhurst at the end of the sixties of the twentieth century proposes the concept of a three-dimensional electrode oxidation method. Electrode materials which are different in shape, different in material and capable of conducting electricity are added between the traditional two-dimensional electrode main electrode plates to serve as particle electrodes, and the particle electrodes are polarized through an external electric field to form charged microelectrodes, so that the specific surface area and the electrolysis efficiency of the electrodes are remarkably improved.
However, the three-dimensional electrode method still has disadvantages such as easy passivation corrosion of the electrode material and short life; low current efficiency, high energy consumption and the like.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the defects of the prior art, the invention aims to provide a pulse three-dimensional electrode wastewater treatment reactor which effectively improves the wastewater treatment effect and the current efficiency and obviously reduces the energy consumption; the adoption of pulse power supply slows down the passivation corrosion of the electrode and effectively prolongs the service life of the electrode.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a pulse three-dimensional electrode wastewater treatment reactor is characterized by comprising an electrolytic tank, an anode, a cathode, a particle electrode, a pulse power supply, an aeration device and an ultrasonic device; the lower part of the electrolytic bath is provided with a liquid inlet, and the upper part of the electrolytic bath is provided with a liquid outlet; the anode and the cathode are arranged in the electrolytic cell; the anode and the cathode are respectively connected with the anode and the cathode of a power supply; the particle electrode is filled between the anode and the cathode; the aeration device is used for introducing air into the electrolytic bath through the microporous aeration pipe; the ultrasonic device comprises an ultrasonic generator and an ultrasonic vibration rod, and the ultrasonic vibration rod is arranged in the electrolytic bath.
Preferably, the electrolytic cell is a rectangular electrolytic cell.
Preferably, the inner wall of the electrolytic cell is provided with a clamping groove for fixing the anode and the cathode.
Preferably, the electrolytic tank is internally provided with a fixed plate which is positioned at one side close to the bottom of the electrolytic tank and prevents the particle electrode from depositing on the bottom of the electrolytic tank.
Preferably, the fixing plate is provided with holes, the hole opening rate is 30% -80%, and the hole diameter is 1-8 mm.
Preferably, the optimal value range of the aperture ratio is 60-70%, and the optimal value range of the aperture is 3-5 mm.
Preferably, the anode is a titanium-based coating electrode, the cathode is a graphite electrode, and the particle electrode is columnar activated carbon.
Preferably, the anode and the cathode are vertically placed in the electrolytic cell and are parallel to each other.
Preferably, the pulse power supply can adjust the pulse duty ratio, and the adjustment range of the pulse duty ratio is 0-1.
Preferably, the pulse duty ratio is 0.3-0.7.
Preferably, the pulse power supply can adjust the pulse frequency, and the adjustment range of the pulse frequency is 0-5000 Hz.
Preferably, the pulse frequency is 1500-3000 Hz.
Preferably, the microporous aeration pipe is arranged at the bottom of the electrolytic tank and below the fixing plate, the microporous aeration pipe is connected with the aeration device through a flow meter, the aeration quantity is adjusted through the flow meter, and the adjusting range of the flow meter is 0-180L/h.
Preferably, the aeration rate is 60-120L/h.
Preferably, the ultrasonic generator can adjust the ultrasonic power, and the adjustment range is 0-600W.
Preferably, the ultrasonic power is 200-400W.
Compared with the prior art, the invention has the following beneficial effects:
(1) the titanium-based coating electrode is used as the anode, so that the occurrence of side reactions is reduced, the current efficiency is higher, the corrosion resistance is strong, and the service life is long; the graphite electrode is used as a cathode, and has low cost, good electric conductivity and thermal conductivity and better corrosion resistance.
(2) The invention adopts a pulse power supply to supply power, and OH and H on the surface of an electrode are electrified 2 O 2 When the concentration of the strong oxidizing substances is increased rapidly, the strong oxidizing substances can be diffused into the solution rapidly when the power is cut off, so that the mass transfer effect is enhanced, the wastewater treatment effect is improved, and the electric energy consumption is reduced. Meanwhile, the passivation corrosion of the electrode can be slowed down by pulse power supply, and the service life of the electrode is prolonged.
(3) The three-dimensional electrode is coupled with the ultrasound, the ultrasonic cavitation effect can prevent reactants from forming a coating on the surface of the electrode, and when the activity of the electrode is reduced, the surface of the electrode is cleaned by ultrasonic waves, surface impurities are eliminated, and the function of reactivating the electrode is achieved; the cavitation effect of the ultrasonic wave can generate transient high temperature and high pressure to increase OH and H 2 O 2 Generating; the mass transfer process of reactants from the liquid-phase main body to the surface of the electrode can be enhanced by the mass transfer enhancement effect generated by the ultrasonic wave, so that concentration polarization generated by mass transfer diffusion is eliminated.
(4) The invention adopts the aeration device to introduce air into the electrolytic cell, on one hand, the O content in the wastewater system is improved 2 The concentration of (c); on the other hand, under the action of aeration, the particle electrode active carbon in the three-dimensional electrode reactor is in a suspended state, and the contact area of the active carbon and a wastewater system is increased, so that mass transfer can be enhanced, and the current efficiency can be improved.
Drawings
FIG. 1 is a structural view of a pulsed three-dimensional electrode wastewater treatment reactor of the present invention;
in the figure: (1) an electrolytic cell; (2) an anode; (3) a cathode; (4) a particle electrode; (5) a pulse power supply; (6) an aeration device; (7) a flow meter; (8) a microporous aeration pipe; (9) an ultrasonic generator; (10) an ultrasonic vibration rod; (11) a fixing plate; (12) a liquid inlet; (13) and a liquid outlet.
Detailed Description
The pulse three-dimensional electrode wastewater treatment reactor of the invention will be clearly and completely described with reference to the accompanying drawings and the specific embodiments.
Example 1:
as shown in figure 1, the pulse three-dimensional electrode wastewater treatment reactor comprises an electrolytic bath 1, an anode 2, a cathode 3, a particle electrode 4, a pulse power supply 5, an aeration device 6 and an ultrasonic device. A liquid inlet 12 is arranged at the lower part of the electrolytic tank 1, a liquid outlet 13 is arranged at the upper part of the electrolytic tank, the liquid inlet 12 is used for introducing wastewater to be treated, and the liquid outlet 13 is used for discharging the treated wastewater; the inner wall of the electrolytic cell 1 is provided with a clamping groove for fixing the anode 2 and the cathode 3; an opening fixing plate 11 is arranged in the electrolytic cell 1 and is positioned at one side close to the bottom of the electrolytic cell 1 to prevent the particle electrode 4 from depositing at the bottom of the electrolytic cell 1; the anode 2 and the cathode 3 are vertically placed in the electrolytic tank 1 and are parallel to each other, the anode 2 is connected with the anode of the pulse power supply 5, the cathode 3 is connected with the cathode of the pulse power supply 5, and the particle electrode 4 is filled between the anode 2 and the cathode 3; the ultrasonic device consists of an ultrasonic generator 9 and an ultrasonic vibrating bar 10, and the ultrasonic vibrating bar 10 is arranged in the electrolytic bath 1; the microporous aeration pipe 8 is arranged at the bottom of the electrolytic bath 1 and is positioned below the fixed plate 11, the microporous aeration pipe 8 is connected with the aeration device 6 through a flow meter 7, and the aeration quantity is adjusted through the flow meter 7.
The anode 2 is made of a titanium-based coating material, and can be a ruthenium-iridium coating titanium electrode or a tin-antimony coating titanium electrode; the cathode 3 is made of graphite material; the distance between the anode 2 and the cathode 3 is 4-10 cm.
The particle electrode 4 adopts columnar activated carbon which has a developed pore structure, a huge specific surface area and strong adsorption capacity.
The pulse power supply 5 can adjust the pulse duty ratio and the pulse frequency, the adjustment range of the pulse duty ratio is 0-1, and the adjustment range of the pulse frequency is 0-5000 Hz; the optimal value range of the pulse duty ratio is 0.3-0.7, and the optimal value range of the pulse frequency is 1500-3000 Hz.
The ultrasonic generator 9 can adjust the ultrasonic power, and the adjustment range is 0-600W; wherein the optimal value range of the ultrasonic power is 200-400W.
The adjustable aeration rate range of the flowmeter 7 is 0-180L/h; wherein the optimal value range of the aeration amount is 60-120L/h.
The aperture ratio of the fixing plate 9 is 30-80%, and the aperture is 1-8 mm; wherein, the optimal value range of the aperture ratio of the fixed plate 9 is 60-70%, and the optimal value range of the aperture is 3-5 mm.
The reactor couples the three-dimensional electrode with the ultrasound, the ultrasonic cavitation effect can prevent reactants from forming a coating on the surface of the electrode, and when the activity of the electrode is reduced, the surface of the electrode is cleaned by ultrasonic waves, surface impurities are eliminated, and the effect of reactivating the electrode is achieved; the cavitation effect of the ultrasonic wave can generate transient high temperature and high pressure to increase OH and H 2 O 2 Generating; the mass transfer process of reactants from the liquid-phase main body to the surface of the electrode can be enhanced by the mass transfer enhancement effect generated by the ultrasonic wave, so that concentration polarization generated by mass transfer diffusion is eliminated.
The function of the aeration device 6: on the one hand, the O content in the wastewater system is increased 2 The concentration of (c); on the other hand, under the action of aeration, the particle electrode active carbon in the three-dimensional electrode reactor is in a suspension state, and the contact area of the active carbon and a wastewater system is large, so that mass transfer can be enhanced, and the current efficiency is favorably improved.
Example 2:
the pulse three-dimensional electrode wastewater treatment reactor shown in FIG. 1 is used for treating printing and dyeing wastewater of a certain factory, and the operation conditions are as follows: printing and dyeing wastewater to be treated enters the electrolytic tank 1 from the liquid inlet 12, and the treated printing and dyeing wastewater is discharged from the liquid outlet 13; aerating the electrolytic tank 1 by an aeration device 6, wherein the aeration rate is 80L/h; the anode 2 adopts a tin-antimony coating titanium electrode and is connected with the anode of a pulse power supply 5; the cathode 3 is a graphite electrode and is connected with the negative electrode of the pulse power supply 5, and the distance between the anode 2 and the cathode 3 is 8 cm; an activated carbon particle electrode 4 with saturated adsorption is arranged between the anode 2 and the cathode 3; the aperture ratio of the fixing plate 11 is 65%, and the aperture is 4 mm; placing an ultrasonic vibration rod 10 in the electrolytic cell 1, and adjusting the power of an ultrasonic generator 9 to 200W; the pulse duty ratio of the pulse power supply 5 is adjusted to be 0.4, and the pulse frequency is 1700 Hz; the reaction time was 120min and the pH of the solution was adjusted to 7. The COD of the printing and dyeing wastewater inlet water is 4630mg/L, after the printing and dyeing wastewater is treated by the three-dimensional electrode reactor, the COD of the printing and dyeing wastewater outlet water is reduced to 780mg/L, the COD removal rate is 83.2 percent, and the energy consumption is 42 kWh/kgCOD.
Example 3:
the pulse three-dimensional electrode wastewater treatment reactor shown in FIG. 1 is used for treating printing and dyeing wastewater of a certain factory, and the operation conditions are as follows: printing and dyeing wastewater to be treated enters the electrolytic tank 1 from the liquid inlet 12, and the treated printing and dyeing wastewater is discharged from the liquid outlet 13; aerating the electrolytic tank 1 by an aeration device 6, wherein the aeration rate is 110L/h; the anode 2 adopts a tin-antimony coating titanium electrode and is connected with the anode of a pulse power supply 5; the cathode 3 is a graphite electrode and is connected with the negative electrode of the pulse power supply 5, and the distance between the anode 2 and the cathode 3 is 7 cm; an activated carbon particle electrode 4 with saturated adsorption is arranged between the anode 2 and the cathode 3; the aperture ratio of the fixing plate 11 is 65%, and the aperture is 4 mm; placing an ultrasonic vibration rod 10 in the electrolytic cell 1, and adjusting the power of an ultrasonic generator 9 to 300W; adjusting the pulse duty ratio of the pulse power supply 5 to be 0.3 and the pulse power to be 2300 Hz; the reaction time was 120min and the pH of the solution was adjusted to 6. The COD of the printing and dyeing wastewater inlet water is 4760mg/L, after the printing and dyeing wastewater is treated by the three-dimensional electrode reactor, the COD of the printing and dyeing wastewater outlet water is reduced to 925mg/L, the COD removal rate is 80.6 percent, and the energy consumption is 48 kWh/kgCOD.
Example 4:
the pulse three-dimensional electrode wastewater treatment reactor shown in figure 1 is adopted to treat citric acid wastewater of a certain factory, and the operation conditions are as follows: the citric acid waste water to be treated enters the electrolytic tank 1 from the liquid inlet 12, and the treated citric acid waste water is discharged from the liquid outlet 13; aerating the electrolytic tank 1 by an aeration device 6 with aeration rate of 100L/h; the anode 2 adopts a ruthenium iridium coating titanium electrode and is connected with the anode of a pulse power supply 5; the cathode 3 is a graphite electrode and is connected with the negative electrode of the pulse power supply 5, and the distance between the anode 2 and the cathode 3 is 7 cm; an activated carbon particle electrode 4 with saturated adsorption is arranged between the anode 2 and the cathode 3; the aperture ratio of the fixing plate 11 is 65%, and the aperture is 4 mm; placing an ultrasonic vibration rod 10 in the electrolytic cell 1, and adjusting the power of an ultrasonic generator 9 to 200W; adjusting the pulse duty ratio of the pulse power supply 5 to be 0.7 and the pulse power to be 1800 Hz; the reaction time is 120min, and the pH value of the solution is adjusted to 6. The COD of the inlet water of the citric acid wastewater is 4042mg/L, the COD of the outlet water of the citric acid wastewater is reduced to 691mg/L after the treatment of the three-dimensional electrode reactor, the removal rate of the COD is 82.9 percent, and the energy consumption is 85 kWh/kgCOD.
Example 5:
the pulse three-dimensional electrode wastewater treatment reactor shown in FIG. 1 is adopted to treat citric acid wastewater of a certain factory, and the operation conditions are as follows: the citric acid waste water to be treated enters the electrolytic tank 1 from the liquid inlet 12, and the treated citric acid waste water is discharged from the liquid outlet 13; aerating the electrolytic tank 1 by an aeration device 6, wherein the aeration rate is 70L/h; the anode 2 adopts a ruthenium iridium coating titanium electrode and is connected with the anode of a pulse power supply 5; the cathode 3 is a graphite electrode and is connected with the negative electrode of the pulse power supply 5, and the distance between the anode 2 and the cathode 3 is 8 cm; an activated carbon particle electrode 4 with saturated adsorption is arranged between the anode 2 and the cathode 3; the aperture ratio of the fixing plate 11 is 65%, and the aperture is 4 mm; placing an ultrasonic vibration rod 10 in an electrolytic cell 1, and adjusting the power of an ultrasonic generator 9 to 250W; adjusting the pulse duty ratio of the pulse power supply 5 to be 0.5 and the pulse power to be 1600 Hz; the reaction time was 120min and the pH of the solution was adjusted to 6. The COD of the inlet water of the citric acid wastewater is 4290mg/L, after the inlet water is treated by the three-dimensional electrode reactor, the COD of the outlet water of the citric acid wastewater is reduced to 489mg/L, the removal rate of the COD is 88.6 percent, and the energy consumption is 66 kWh/kgCOD.
The above-mentioned embodiments are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only the most preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions, equivalents, etc. made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A pulse three-dimensional electrode wastewater treatment reactor is characterized by comprising an electrolytic tank, an anode, a cathode, a particle electrode, a pulse power supply, an aeration device and an ultrasonic device;
the lower part of the electrolytic tank is provided with a liquid inlet, and the upper part of the electrolytic tank is provided with a liquid outlet; the anode and the cathode are arranged in the electrolytic cell; the anode and the cathode are respectively connected with the anode and the cathode of the pulse power supply; the particle electrode is filled between the anode and the cathode; the aeration device is used for introducing air into the electrolytic bath through the microporous aeration pipe; the ultrasonic device comprises an ultrasonic generator and an ultrasonic vibration rod, and the ultrasonic vibration rod is arranged in the electrolytic bath.
2. The reactor of claim 1, wherein the electrolytic cell is a rectangular electrolytic cell, and the inner wall of the electrolytic cell is provided with a clamping groove for fixing the anode and the cathode.
3. The pulsed three-dimensional electrode wastewater treatment reactor according to claim 1, wherein the electrolytic bath is provided with a fixed plate inside, which is located at a side near the bottom of the electrolytic bath, for preventing the electrode deposition of particles to the bottom of the electrolytic bath.
4. The reactor of claim 3, wherein the fixing plate has an opening with a ratio of 30-80% and a diameter of 1-8 mm.
5. The pulsed three-dimensional electrode wastewater treatment reactor according to claim 1, wherein the anode is a titanium-based coated electrode, the cathode is a graphite electrode, and the particle electrode is columnar activated carbon.
6. The pulsed three-dimensional electrode wastewater treatment reactor according to claim 1, wherein the anode and the cathode are vertically placed in the electrolytic cell and are parallel to each other.
7. The pulsed three-dimensional electrode wastewater treatment reactor according to claim 1, wherein the pulse power supply can adjust the pulse duty ratio, and the adjustment range of the pulse duty ratio is 0-1.
8. The pulsed three-dimensional electrode wastewater treatment reactor according to claim 1, wherein the pulse power supply can adjust the pulse frequency, and the adjustment range of the pulse frequency is 0-5000 Hz.
9. The wastewater treatment reactor of claim 1, wherein the microporous aeration pipe is arranged at the bottom of the electrolytic tank and below the fixing plate, the microporous aeration pipe is connected with the aeration device through a flow meter, the aeration rate is adjusted through the flow meter, and the adjustment range of the flow meter is 0-180L/h.
10. The pulsed three-dimensional electrode wastewater treatment reactor according to claim 1, wherein the ultrasonic generator is capable of adjusting the ultrasonic power within a range of 0-600W.
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| US20110236769A1 (en) * | 2010-03-23 | 2011-09-29 | Xing Xie | Three dimensional electrodes useful for microbial fuel cells |
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