CN107162124A - A kind of electroplating wastewater without method for sludge treatment - Google Patents
A kind of electroplating wastewater without method for sludge treatment Download PDFInfo
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- CN107162124A CN107162124A CN201710357187.4A CN201710357187A CN107162124A CN 107162124 A CN107162124 A CN 107162124A CN 201710357187 A CN201710357187 A CN 201710357187A CN 107162124 A CN107162124 A CN 107162124A
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- web plate
- anode
- negative electrode
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
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- Chemical Kinetics & Catalysis (AREA)
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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)
Abstract
This patent discloses a kind of electroplating wastewater without method for sludge treatment, this method is directed to electrogalvanizing factory comprehensive wastewater or oil interceptor oily waste water, using electroxidation processing unit, degrade organic pollution therein, waste water is flowed into from electroxidation processing unit bottom water inlet, each pole plate is flowed through in plug flow form, is finally flowed out through the delivery port at the top of device, wastewater treatment condition is the 12.5mA/cm of current density 7.52, the 60min of hydraulic detention time 30, stable water outlet is in pH6 9, COD after processing<80mg/L, reaches《Electroplate pollutant emission standard》（GB21900‑2008）The emission limit requirement of table 2.Compared with prior art, the beneficial effects of the present invention are：Wastewater pH need not be adjusted, without adding any water treatment agent toward waste water, therefore electroless plating sludge is produced, processing cost is low, and package unit ground area is small, easy to operate.
Description
Technical field
The invention belongs to electroplating wastewater processing field, be related to a kind of electroplating wastewater without method for sludge treatment.
Background technology
The materializing strategy technique based on dosing flocculation or electric flocculation-air supporting being used current electroplating wastewater, water quality can not more
Stably reaching standard is discharged, and sludge yield is big.As typical hazardous waste, the processing disposal expense of electroplating sludge accounts for electroplating wastewater
The significant proportion of processing cost.
The content of the invention
Mesh of the present invention be to provide a kind of electroplating wastewater without method for sludge treatment, this method need not adjust wastewater pH, need not
Any chemical agent is added, current density is flexibly set according to waste water COD concentration, easy to operate, stable effluent quality is in pH6-
9、COD<80mg/L, reaches《Electroplate pollutant emission standard》(GB21900-2008) the emission limit requirement of table 2.
The technical solution adopted by the present invention is：
A kind of electroplating wastewater without method for sludge treatment, it is characterised in that：Comprise the following steps：
(1) processing equipment is assembled, processing equipment includes sewage pump, flowmeter, electroxidation device and rectifier, electroxidation dress
Put vertically arranged, and water inlet is down, upward, sewage pump is connected delivery port with the water inlet of electroxidation device, and flowmeter is located at
Between sewage pump and electroxidation device；Electroxidation device includes cell body, obstruction stream plate, anode web plate and negative electrode web plate, anode network
Plate and negative electrode web plate are equidistant spaced in cell body, and the positive pole and negative pole of anode web plate and negative electrode web plate respectively with rectifier connect
Connect, obstruction stream plate is located at cell body close to one end of water inlet；
(2) sewage pump and rectifier are opened, sewage pump is by electrogalvanizing factory comprehensive wastewater or oil interceptor oily waste water from bottom
Water inlet be pumped into electroxidation device, and flow through negative electrode web plate and the alternate electro-oxidation reaction of anode web plate in plug flow form
Area, finally flows out from the delivery port at top；Hydraulic detention time is controlled to be 30-60min according to flowmeter, rectifier is close by electric current
Degree is set as 7.5-12.5mA/cm2, tank voltage is 4.5-6.5V；
(3) delivery port water quality is monitored in real time, and stable water outlet is in pH6-9, COD<80mg/L, reaches《Electroplate pollutant emission
Standard》(GB21900-2008) during the emission limit requirement of table 2, sewage pump and rectifier are closed.
Negative electrode web plate is circular metal titanium net, and anode web plate is ruthenium iridium coating layer DSA Ti electrodes.
Negative electrode web plate and each 24 of anode web plate, the spacing between negative electrode web plate and anode web plate are 25mm.
Negative electrode web plate is connected in cell body by cathode branch pushing out ring, and anode web plate is connected in cell body by anode-supported ring
Interior, anode web plate is connected with anode electrical connecting rod, and anode electrical connecting rod is connected with conductive anode rod, negative electrode web plate and negative electrode
Be electrically connected bar connection, negative electrode electrical connection bar is connected with negative electrode conducting rod, conductive anode rod and negative electrode conducting rod respectively with it is whole
Flow positive pole and the negative pole connection of device.
Cell body is in cylindrical type, and internal diameter is 0.2-0.4m, and cell body dischargeable capacity is 0.03-0.12m3, processing water 1-5m3/ d,
Water inlet and-delivery port are connected by seal with cell body respectively；The bore of changeover portion between water inlet and cell body is along current
Direction is become larger, and the bore of the changeover portion between delivery port and cell body is tapered into along water (flow) direction.
Compared with existing electroplating waste water treatment technology, benefit of the invention is mainly reflected in：(1) produced without sludge；(2) place
Manage flow simple, equipment is few, simple to operate；(3) processing cost is low；(4) chemical agent and regulation influent quality need not be added；
(5) stable effluent quality；(6) handle after water outlet can qualified discharge, can also enter sewerage disposing system, greatly improve grey water system
Operational reliability and stability, fresh water consumption in reduction production.
Brief description of the drawings
Fig. 1 is the structural representation of the electroxidation device of the present invention；
Fig. 2 is the structural representation of meshed anode plate.
Wherein：1- water inlets, 2- delivery ports, 3- obstruction stream plates, 4- electroxidation device cylinders, 5- ruthenium iridium coating layer DSA web plates
Ni―Ti anode, 6- web plate Ti cathodes, 7- seals, 8- anode electrical connecting rods, 9- negative electrodes electrical connection bar, 10- anode-supported rings,
11- cathode branch pushing out rings, 12- conductive anode rods, 13- negative electrode conducting rods.
Embodiment
Below by specific embodiment, the present invention is described further, but the protection of the present invention is not limited to this.
Figure includes：Water inlet 1, delivery port 2, obstruction stream plate 3, electroxidation device cylinder 4, anode web plate 5, negative electrode web plate
6th, seal 7, anode electrical connecting rod 8, negative electrode electrical connection bar 9, anode-supported ring 10, cathode branch pushing out ring 11, anode conducting
Bar 12 and negative electrode conducting rod 13.
A kind of electroplating wastewater without method for sludge treatment, it is characterised in that：Comprise the following steps：
(1) processing equipment is assembled, processing equipment includes sewage pump, flowmeter, electroxidation device and rectifier, electroxidation dress
Put vertically arranged, and water inlet is down, upward, sewage pump is connected delivery port with the water inlet of electroxidation device, and flowmeter is located at
Between sewage pump and electroxidation device；Electroxidation device includes cell body, obstruction stream plate, anode web plate and negative electrode web plate, anode network
Plate and negative electrode web plate are equidistant spaced in cell body, and the positive pole and negative pole of anode web plate and negative electrode web plate respectively with rectifier connect
Connect, obstruction stream plate is located at cell body close to one end of water inlet；
(2) sewage pump and rectifier are opened, sewage pump is by electrogalvanizing factory comprehensive wastewater (pH6.6-9.1, COD150-
310mg/L) or oil interceptor oily waste water (pH4.5-5.6, COD210-420mg/L) from the water inlet of bottom be pumped into electroxidation dress
In putting, and negative electrode web plate and the alternate electro-oxidation reaction area of anode web plate are flowed through in plug flow form, finally from the water outlet at top
Mouth outflow；Hydraulic detention time is controlled to be 30-60min according to flowmeter, current density is set as 7.5-12.5mA/ by rectifier
cm2, tank voltage is 4.5-6.5V；
(3) delivery port water quality is monitored in real time, and stable water outlet is in pH6-9, COD<80mg/L, reaches《Electroplate pollutant emission
Standard》(GB21900-2008) during the emission limit requirement of table 2, sewage pump and rectifier are closed.
Negative electrode web plate is circular metal titanium net, and anode web plate is ruthenium iridium coating layer DSA Ti electrodes.
Negative electrode web plate and each 24 of anode web plate, the spacing between negative electrode web plate and anode web plate are 25mm.
Negative electrode web plate is connected in cell body by cathode branch pushing out ring, and anode web plate is connected in cell body by anode-supported ring
Interior, anode web plate is connected with anode electrical connecting rod, and anode electrical connecting rod is connected with conductive anode rod, negative electrode web plate and negative electrode
Be electrically connected bar connection, negative electrode electrical connection bar is connected with negative electrode conducting rod, conductive anode rod and negative electrode conducting rod respectively with it is whole
Flow positive pole and the negative pole connection of device.
Cell body is in cylindrical type, and internal diameter is 0.2-0.4m, and cell body dischargeable capacity is 0.03-0.12m3, processing water 1-5m3/ d,
Water inlet and-delivery port are connected by seal with cell body respectively；The bore of changeover portion between water inlet and cell body is along current
Direction is become larger, and the bore of the changeover portion between delivery port and cell body is tapered into along water (flow) direction.
If because dump, oil interceptor deoiling effect be not good etc., factor causes waste water COD excessive concentration, can be useless by reduction
Water flow velocity is to increase hydraulic detention time to make the continual and steady qualified discharge of waste water with the mode that suitably increase current density is combined.
Emphasis of the present invention is applied to electrogalvanizing factory comprehensive wastewater and oil interceptor oily waste water, dense to other plating platings COD
The higher waste water of degree, such as plating piece pre-treatment waste water also have versatility.
Electroxidation technology is directly aoxidized with pollutant based on the strong oxidizing property free radical formed in electrochemical system
Effect, so that pollutant is degraded, therefore produces without sludge, with non-secondary pollution, advantages of environment protection is a kind of
There is new " green " water technology for being widely popularized value and application prospect.
For electroplating wastewater, the especially comprehensive wastewater of electrogalvanizing factory, oil interceptor oily waste water, using electroxidation technology,
Organic pollution that can be effectively in Decomposition Wastewater, it is to avoid because using conventional physical chemical treatment technology water outlet COD is up to standard, dirt
The problem of mud amount is big.For electroplating wastewater, not yet useful electroxidation technology carries out the research report of COD degradation and mud decrement.
Embodiment
Pond waste water and oil interceptor oily waste water are integrated as pending waste water using certain electrogalvanizing factory respectively, by above-mentioned waste water
Cylinder is pumped into from electroxidation bottom of device water inlet respectively, each electrode is flowed through in plug flow form under certain flow rate, waste water exists
Hydraulic detention time 30-60min in cell body between anode and cathode, using constant current electroxidation, according to inlet COD concentration to waste water
The current density of processing is adjusted, and inlet COD concentration is low then to use lower current densities 7.5mA/cm2, it is on the contrary then with higher
Current density 12.5mA/cm2, stable in below 80mg/L to water outlet COD, processing reaches after requirement waste water from device delivery port stream
Go out.
Water quality contrast table before and after wastewater treatment
Upper table result shows, electroplating wastewater can be effectively handled using electroxidation device, and operational effect is stable, is suitable for certain
The variation water quality of degree.Stable water outlet after processing is in pH6-9, COD<80mg/L, reaches《Electroplate pollutant emission standard》
(GB21900-2008) the emission limit requirement of table 2.
In instances, waste water treatment and integral power consumption 8.4-26.6KWh/m3, reduce electroplating sludge 2.5-5Kg/m3, reduce water
Treatment agent and water process running cost 3.5-6 members/m3, compared with traditional dosing flocculation or electric flocculation-air-float technology, at electroxidation
Reason method has floor space small, easy to operate, stable, the features such as high treating effect, and has processing cost advantage, adapts to
The environmental protection management of current electroplating sludge minimizing is required, with obvious promotional value and wide application prospect.
Claims (5)
1. a kind of electroplating wastewater without method for sludge treatment, it is characterised in that：Comprise the following steps：
Processing equipment is assembled, processing equipment includes sewage pump, flowmeter, electroxidation device and rectifier, and electroxidation device is vertical
Set, and water inlet is down, upward, sewage pump is connected delivery port with the water inlet of electroxidation device, and flowmeter is located at sewage pump
Between electroxidation device；Electroxidation device includes cell body, obstruction stream plate, anode web plate and negative electrode web plate, anode web plate and the moon
Polar net plate is equidistantly spaced, and in cell body, anode web plate and negative electrode web plate are connected with the positive pole and negative pole of rectifier respectively, resistance
Plug flow plate is located at cell body close to one end of water inlet；
Open sewage pump and rectifier, sewage pump is by electrogalvanizing factory comprehensive wastewater or oil interceptor oily waste water from the water inlet of bottom
It is pumped into electroxidation device, and negative electrode web plate and the alternate electro-oxidation reaction area of anode web plate is flowed through in plug flow form, finally
Flowed out from the delivery port at top；Hydraulic detention time is controlled to be 30-60min according to flowmeter, rectifier sets current density
For 7.5-12.5mA/cm2, tank voltage is 4.5-6.5V；
Delivery port water quality is monitored in real time, and stable water outlet is in pH6-9, COD<80mg/L, reaches《Electroplate pollutant emission standard》
（GB21900-2008）During the emission limit requirement of table 2, sewage pump and rectifier are closed.
2. electroplating wastewater as claimed in claim 1 without method for sludge treatment, it is characterised in that：Negative electrode web plate is circular metal
Titanium net, anode web plate is ruthenium iridium coating layer DSA Ti electrodes.
3. electroplating wastewater as claimed in claim 1 without method for sludge treatment, it is characterised in that：Negative electrode web plate and anode web plate
Each 24, the spacing between negative electrode web plate and anode web plate is 25mm.
4. electroplating wastewater as claimed in claim 1 without method for sludge treatment, it is characterised in that：Negative electrode web plate passes through cathode branch
Pushing out ring is connected in cell body, and anode web plate is connected in cell body by anode-supported ring, anode web plate and anode electrical connecting rod
Connection, anode electrical connecting rod is connected with conductive anode rod, and negative electrode web plate is connected with negative electrode electrical connection bar, negative electrode electrical connection
Bar is connected with negative electrode conducting rod, and conductive anode rod and negative electrode conducting rod are connected with the positive pole and negative pole of rectifier respectively.
5. the method for electroplating wastewater is handled using electroxidation device described in claim 1, it is characterised in that：Cell body is in cylindrical type,
Internal diameter is 0.2-0.4m, and cell body dischargeable capacity is 0.03-0.12m3, processing water 1-5m3/ d, water inlet and-delivery port lead to respectively
Seal is crossed to be connected with cell body；The bore of changeover portion between water inlet and cell body becomes larger along water (flow) direction, delivery port with
The bore of changeover portion between cell body is tapered into along water (flow) direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710357187.4A CN107162124A (en) | 2017-05-19 | 2017-05-19 | A kind of electroplating wastewater without method for sludge treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710357187.4A CN107162124A (en) | 2017-05-19 | 2017-05-19 | A kind of electroplating wastewater without method for sludge treatment |
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| CN107162124A true CN107162124A (en) | 2017-09-15 |
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| CN201710357187.4A Pending CN107162124A (en) | 2017-05-19 | 2017-05-19 | A kind of electroplating wastewater without method for sludge treatment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1085753A (en) * | 1996-09-12 | 1998-04-07 | Agency Of Ind Science & Technol | Waste water treatment device |
| CN102583662A (en) * | 2012-02-24 | 2012-07-18 | 浙江工业大学 | Screen plunger piston flow electrolyzing device and method for treating organic wastewater |
| CN106145275A (en) * | 2016-06-30 | 2016-11-23 | 浙江科源环境科技有限公司 | A kind of closed piston flow electrocatalysis device and method of wastewater treatment |
| CN106517427A (en) * | 2016-10-21 | 2017-03-22 | 河海大学 | Wastewater treatment device and method |
-
2017
- 2017-05-19 CN CN201710357187.4A patent/CN107162124A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1085753A (en) * | 1996-09-12 | 1998-04-07 | Agency Of Ind Science & Technol | Waste water treatment device |
| CN102583662A (en) * | 2012-02-24 | 2012-07-18 | 浙江工业大学 | Screen plunger piston flow electrolyzing device and method for treating organic wastewater |
| CN106145275A (en) * | 2016-06-30 | 2016-11-23 | 浙江科源环境科技有限公司 | A kind of closed piston flow electrocatalysis device and method of wastewater treatment |
| CN106517427A (en) * | 2016-10-21 | 2017-03-22 | 河海大学 | Wastewater treatment device and method |
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Application publication date: 20170915 |
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| RJ01 | Rejection of invention patent application after publication |