CN106006866A - Wastewater electrooxidation treatment method based on varying potential control - Google Patents
Wastewater electrooxidation treatment method based on varying potential control Download PDFInfo
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- CN106006866A CN106006866A CN201610501871.0A CN201610501871A CN106006866A CN 106006866 A CN106006866 A CN 106006866A CN 201610501871 A CN201610501871 A CN 201610501871A CN 106006866 A CN106006866 A CN 106006866A
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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
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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
- C02F1/46104—Devices therefor; Their operating or servicing
-
- 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
- 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
- C02F2001/46133—Electrodes characterised by the material
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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
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46152—Electrodes characterised by the shape or form
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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
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4612—Controlling or monitoring
- C02F2201/46125—Electrical variables
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- 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)
Abstract
The invention discloses a wastewater electrooxidation treatment method based on varying potential control, belonging to the technical field of wastewater treatment. The treatment process is as follows: the wastewater enters a plug flow electrooxidation device and is pushed forward by a guide plate and sequentially passes the reaction units different in potential control to realize electrooxidation treatment on the pollutants in the wastewater. In the invention, through the varying potential control technology, the current efficiency is improved, and the energy consumption in the wastewater electrooxidation process is reduced; and after the treatment, the water quality indexes meet the requirements of related national standards.
Description
Technical field
The invention belongs to technical field of waste water processing, be specifically related to a kind of energy-conservation, efficiently based on becoming the useless of control of Electric potentials
Water power oxidation treatment method.
Background technology
Industrial Wastewater Treatment is a difficult problem of field of water pollution control.Research and engineering practice show, electricity decomposition is
Except a kind of effective ways of poisonous and harmful substance in the industry waste water such as pharmacy, chemical industry, printing and dyeing.Various active electrode materials and novel
Reactor is increasingly developed, but the problem that current efficiency is low, energy consumption is high can not get effectively solving all the time.Controlled leading by constant potential
The impact of technology, analyses the side reaction ratios such as oxygen liberation of hydrogen high, and utilization rate of electrical is low.
Numerous research displays, pollutant levels and current efficiency change in declining with processing time lengthening.According to this
Special formula journey and Butler-Volmer equation, electrode potential and limiting current density are by reactant or production concentration, solution temperature etc.
Factor affects.Therefore, invent a kind of optimize electro-oxidation process control, reduce energy consumption technology, to electroxidation waste water process push away
Wide application has and is of great significance.
Summary of the invention
The present invention seeks to the bottleneck big for Wastewater by Electric oxidation processes energy consumption, current efficiency is low, propose one joint
Energy, efficiently Wastewater by Electric oxidation treatment method based on change control of Electric potentials.
Described Wastewater by Electric oxidation treatment method based on change control of Electric potentials, including electroxidation device, potential monitoring instrument, arteries and veins
Rush DC source, it is characterised in that in electroxidation device, be provided with potential monitoring instrument, potential monitoring instrument and pulse direct current source signal
Connect, the actual potential value in potential monitoring instrument monitoring electroxidation device reaction unit, and actual potential value is passed through holding wire
Feed back to pulse dc power, pulse dc power control the output current density value of this electroxidation device reaction unit, adopt
Wastewater by Electric oxidation processes in electroxidation device is carried out by change control of Electric potentials.
Described Wastewater by Electric oxidation treatment method based on change control of Electric potentials, it is characterised in that described electroxidation device is post
Plug flow electroxidation device, waste water is advanced to each reaction member being connected in series by deflector, and front and back reaction member does not returns
Mixed.
Described Wastewater by Electric oxidation treatment method based on change control of Electric potentials, it is characterised in that described electroxidation device includes
2 ~ 5 reaction members, preferably 3 reaction members, each reaction member water inlet side is provided with deflector, in each reaction member
Put electrode assemblie and potential monitoring instrument, electrode assemblie separate connection pulse dc power.
Described Wastewater by Electric oxidation treatment method based on change control of Electric potentials, it is characterised in that described electrode assemblie uses net
Shape titanium-based metal oxide makees anode, titanium mesh plate is that negative electrode, anode and negative electrode are alternately arranged, negative electrode number many than anode,
The die opening of adjacent anode and cathode is 1 ~ 3cm.
Described Wastewater by Electric oxidation treatment method based on change control of Electric potentials, it is characterised in that described change control of Electric potentials is root
According to the corresponding relation of reaction member internal contamination substrate concentration Yu oxidation-reduction potential, set this reaction member controlling potential value, by electricity
Actual potential value is fed back to pulse dc power by position monitor, and pulse dc power is according to setup control potential value and reality electricity
The difference of place value controls output electric current density size, it is achieved become Wastewater by Electric oxidizing process in this reaction member of control of Electric potentials；
Described Wastewater by Electric oxidation treatment method based on change control of Electric potentials, it is characterised in that described reaction member is irrigation canals and ditches shape,
It makes materials'use polypropylene or concrete epoxy is resin-lined.
Described Wastewater by Electric oxidation treatment method based on change control of Electric potentials, it is characterised in that the electric oxygen of each reaction member
Change condition is: electric current density 5 ~ 20mA/cm2, front-and-back unit electric current density decreasing gradient is 2 ~ 5mA/cm2, each unit hydraulic retention
Time is 5 ~ 20min.
With existing electroxidation Technical comparing, the present invention has the advantages that: by becoming control of Electric potentials, improve electric current
Efficiency, reduces energy consumption, saves the cost of electro-oxidation process.
Accompanying drawing explanation
Fig. 1 is the structural representation of this embodiment.
In figure: 1-water inlet, 2-electroxidation device body, 3-the first reaction member, 4-the second reaction member, 5-water conservancy diversion
Plate, 6-the 3rd reaction member, 7-outlet, 8-potential monitoring instrument, 9-pulse dc power, 10-electrode assemblie.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, the present invention is described further, but protection scope of the present invention is also
It is not limited only to this:
As it is shown in figure 1, the Wastewater by Electric oxidation treatment device of the change control of Electric potentials of the present invention, for plug flow electroxidation device, its bag
Include electroxidation device body 2, described electroxidation device body 2 left end be water inlet 1, right-hand member be outlet 7, electroxidation device this
The multiple reaction members set gradually in body 2, the water inlet side of each reaction member is equipped with deflector 5, and waste water is by leading
Stream plate 5 enters each reaction member, makes adjacent two reaction members that back-mixing not occur；Each reaction member includes electrode assemblie 10
And potential monitoring instrument 8, electrode assemblie 10 uses netted titanium-based metal oxide to make anode, titanium mesh plate is negative electrode, anode and negative electrode
Alternately arranged it being arranged in electroxidation device body 2, and negative electrode number than anode many, the die opening of adjacent anode and cathode is 1 ~
3cm, the pulse dc power 9 that electrode assemblie 10 separate connection in each reaction member is corresponding, the electricity on each working cell
Position monitor 8 connects with corresponding pulse dc power 9 signal.
As it is shown in figure 1, the embodiment of the present invention selects 3 reaction members: first reaction member the 3, second reaction member 4 and the
Three reaction members 6, and three reaction members are sequentially connected in series, each reaction member is irrigation canals and ditches shape, the first reaction member 3,
In two reaction members 4 and the 3rd reaction member 6, the water inlet side of each reaction member is provided with deflector 5, and waste water passes through water conservancy diversion
Plate 5 enters each reaction member of correspondence, prevents back-mixing.
Present invention Wastewater by Electric based on described Wastewater by Electric oxidation treatment device oxidation treatment method method, pending waste water
Promote the water inlet 1 sending into electroxidation device body 2 through pump, deflector 12 plug-flow the most forward enter each reaction member and enter
Row electro-oxidation reaction, each reaction member is for becoming control of Electric potentials, and the most each reaction member is according to pollutant levels and oxidoreduction
Potential change, setup control potential value, potential monitoring instrument 8 actual potential value is fed back to DC source 9, control output electric current
Density size.The outlet 7 of last electroxidation device body 2 flows out, and completes electrolytic process, the electroxidation bar of each reaction member
Part is: electric current density 5 ~ 20mA/cm2, hydraulic detention time is 5 ~ 20min, and the most adjacent two cell current density are successively decreased ladder
Degree is 2 ~ 5mA/cm2。
As it is shown in figure 1, the Wastewater by Electric oxidation treatment method based on change control of Electric potentials of the present invention, specifically include following step
Rapid: waste water promotes the entrance sending into plug flow electroxidation device the first reaction member through pump, deflector plug-flow the most forward enter
Enter subsequent reactions unit, flow out from the outlet of last unit, complete electrolytic process.
Its operation principle is, water electrolysis produces OH,
H2O→•OH +•H。
The OH group formed has strong oxidizing property, and oxidizing electrode current potential is up to 2.80V, compares O3(2.07V) high by 35%；Separately
Outward, this group has high electronegativity (electrophilicity), and its electron affinity energy is 569.3kJ, easy attack height cloud density point.Cause
This, OH group can play the deep oxidation to pollutant and decompose, and then reaches processing intent.
Each reaction member changes according to pollutant levels and oxidation-reduction potential (ORP), and setup control potential value, by electricity
Actual potential value is fed back to DC source by position monitor, controls each reaction member corresponding power output electric current density size.
Embodiment 1:
Utilizing the method to process certain pharmacy actual production waste water, operating parameter is: waste water COD mean intensity value 128.75mg/L,
Ammonia nitrogen mean intensity value 69.18 mg/L, electric current density 5 ~ 15 mA/cm2, design 3 reaction members, each unit dischargeable capacity
0.6m3, hydraulic detention time is 10min, and three reaction member actual ORP controlling values (feeding back through potential monitoring instrument signal) are respectively
For+90mV ,+110mV ,+130mV, corresponding input current density is 15mA/cm2、10mA/cm2、5mA/cm2, front-and-back unit electric current
Density decreasing gradient 5mA/cm2.Water outlet COD mean intensity value is less than 50.0mg/L, and ammonia nitrogen mean intensity value is less than 5.0mg/L,
Effluent quality meets country and is directly discharged into the relevant criterion of environment, and current efficiency is 69.05%, controls technology with original constant potential
Compare, improve 19.8%.
Claims (7)
1. Wastewater by Electric oxidation treatment method based on change control of Electric potentials, including electroxidation device (2), potential monitoring instrument (8), pulse
DC source (10), it is characterised in that being provided with potential monitoring instrument (8) in electroxidation device (2), potential monitoring instrument (8) is straight with pulse
Stream power supply (9) signal connects, the actual potential value in potential monitoring instrument (8) monitoring electroxidation device reaction unit, and by reality
Potential value feeds back to pulse dc power (9) by holding wire, pulse dc power (9) control this electroxidation device reaction list
The output current density value of unit, it is achieved become control of Electric potentials and carry out Wastewater by Electric oxidation processes in electroxidation device.
The most according to claim 1 based on the Wastewater by Electric oxidation treatment method becoming control of Electric potentials, it is characterised in that described electricity
Oxidation unit (2) is plug flow electroxidation device, and waste water is advanced to each reaction member being connected in series by deflector, the most instead
Answer unit that back-mixing does not occur.
The most according to claim 1 based on the Wastewater by Electric oxidation treatment method becoming control of Electric potentials, it is characterised in that described electricity
Oxidation unit (2) includes that 2 ~ 5 reaction members, each reaction member water inlet side are provided with deflector (5), each reaction member
Built-in electrode assembly (10) and potential monitoring instrument (8), electrode assemblie (10) separate connection pulse dc power (9).
The most according to claim 1 based on the Wastewater by Electric oxidation treatment method becoming control of Electric potentials, it is characterised in that described electricity
Pole assembly (10) uses netted titanium-based metal oxide to make anode, titanium mesh plate is that negative electrode, anode and negative electrode are alternately arranged, negative electrode
Number many one than anode, the die opening of adjacent anode and cathode is 1 ~ 3cm.
The most according to claim 1 based on the Wastewater by Electric oxidation treatment method becoming control of Electric potentials, it is characterised in that described change
Control of Electric potentials is the corresponding relation according to reaction member internal contamination substrate concentration Yu oxidation-reduction potential, sets this reaction member and controls
Potential value, is fed back to pulse dc power (9) by potential monitoring instrument (8) by actual potential value, and pulse dc power (9) is according to setting
Determine the difference control output electric current density size of controlling potential value and actual potential value, it is achieved become in this reaction member of control of Electric potentials
Wastewater by Electric oxidizing process.
The most according to claim 1 based on become control of Electric potentials Wastewater by Electric oxidation treatment method, it is characterised in that described instead
Answering unit is irrigation canals and ditches shape, and it makes materials'use polypropylene or concrete epoxy is resin-lined.
7. according to the arbitrary described Wastewater by Electric oxidation treatment method based on change control of Electric potentials of claim 1-6, it is characterised in that
The electroxidation condition of each reaction member is: electric current density 5 ~ 20mA/cm2, front-and-back unit electric current density decreasing gradient is 2 ~
5mA/cm2, each unit hydraulic detention time is 5 ~ 20min.
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| CN201610501871.0A CN106006866B (en) | 2016-06-30 | 2016-06-30 | Based on the Wastewater by Electric oxidation treatment method for becoming control of Electric potentials |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517427A (en) * | 2016-10-21 | 2017-03-22 | 河海大学 | Wastewater treatment device and method |
| CN106629999A (en) * | 2016-11-29 | 2017-05-10 | 浙江科源环境科技有限公司 | Electroacoustic multivariant catalytic oxidation device and method for treating wastewater by using same |
| CN106673139A (en) * | 2016-12-15 | 2017-05-17 | 中国矿业大学 | Electrochemical step-by-step denitrification device |
| CN107192741A (en) * | 2017-05-26 | 2017-09-22 | 新希望乳业股份有限公司 | Guaranteed milk pasteurize retention time assay method |
| CN113087092A (en) * | 2021-04-12 | 2021-07-09 | 浙江树人学院（浙江树人大学） | Electric oxidation treatment method for wastewater based on current density gradient control |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106517427A (en) * | 2016-10-21 | 2017-03-22 | 河海大学 | Wastewater treatment device and method |
| CN106629999A (en) * | 2016-11-29 | 2017-05-10 | 浙江科源环境科技有限公司 | Electroacoustic multivariant catalytic oxidation device and method for treating wastewater by using same |
| CN106673139A (en) * | 2016-12-15 | 2017-05-17 | 中国矿业大学 | Electrochemical step-by-step denitrification device |
| CN107192741A (en) * | 2017-05-26 | 2017-09-22 | 新希望乳业股份有限公司 | Guaranteed milk pasteurize retention time assay method |
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| CN113087092A (en) * | 2021-04-12 | 2021-07-09 | 浙江树人学院（浙江树人大学） | Electric oxidation treatment method for wastewater based on current density gradient control |
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