CN106115862B - Electrolysis water process units and method - Google Patents
Electrolysis water process units and method Download PDFInfo
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- CN106115862B CN106115862B CN201610525047.9A CN201610525047A CN106115862B CN 106115862 B CN106115862 B CN 106115862B CN 201610525047 A CN201610525047 A CN 201610525047A CN 106115862 B CN106115862 B CN 106115862B
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- water
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- electrolysis
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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
-
- 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
- C02F2001/46138—Electrodes comprising a substrate and a coating
-
- 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
Abstract
The invention discloses a kind of electrolysis water process units and methods.The inventive system comprises shell, diaphragm, first electrode and second electrodes；The shell is divided into the first tank house and the second tank house by the diaphragm, and the first electrode and the second electrode are separately positioned in first tank house and second tank house；The first electrode includes stainless steel substrate, coating of titanium dioxide and the platinum coating containing lanthanum；The coating of titanium dioxide is arranged in stainless steel substrate outer surface, with a thickness of 5~10 microns；The platinum coating containing lanthanum is arranged in coating of titanium dioxide outer surface, with a thickness of 3~10 microns；Based on the total weight of the platinum coating containing lanthanum, the platinum coating containing lanthanum contains the lanthanum of 0.1~5wt%.The present invention uses the stainless steel substrate with coating of titanium dioxide and the platinum coating containing lanthanum, reduces production cost, and stability in use is good.
Description
Technical field
The present invention relates to a kind of electrolysis water process units and methods, especially with the good electrolysis water process units of stability
And method.
Background technique
Electrolysis water can be generated in electrolytic water generating device, mainly includes alkaline water, slightly acidic water, strong oxidized water etc..Electrode
It is all the core equipment of electrolytic water generating device with seperation film, there are close relationships for the quality of they and electrolysis water.
CN205099424U discloses a kind of electrode can scale removal electrolytic water device comprising by electrolytic cell housing, anode and
The electrolytic cell that cathode is constituted, electrolytic cell housing are equipped with anode, cathode, and anode, cathode connect polar circuit by conducting wire respectively,
Polar circuit connects control circuit and electrolyzer power source by conducting wire respectively, and electrolytic cell housing is equipped with ultrasonic transducer, surpasses
Acoustic wave transducer connects transducer driving circuit by conducting wire, and transducer driving circuit connects control circuit by conducting wire.The electricity
Solution water installations, which can reduce electrode surface scale and generate, carrys out guard electrode, but cannot prevent electrode from oozing out harmful metal ion.
The electrode of electrolytic water generating device oozes out harmful metal ion in order to prevent, generallys use platinum Ti electrode as electrolysis water and generates dress
The anode set.But platinum Ti electrode is expensive, this causes the production cost of electrolytic water generating device high, serious to make
About its popularization and application.Therefore, it is necessary to cheap electrodes to substitute platinum Ti electrode.
CN202440350U discloses a kind of device for tap water electrolytic separation, by amberplex, titanium alloy sun
Pole, stainless steel cathode, tank house, upper end cover, lower cover are constituted, and amberplex is mounted on Ti-alloy anode and stainless steel cathode
Between, Ti-alloy anode is mounted on the side of tank house, and stainless steel cathode is mounted on the other side of tank house, and tank house is fixed on
Between upper end cover and lower cover.The patent document has ruthenium iridium metals layer in the surface burn-back of Ti-alloy anode, closes instead of in titanium
The platinum being electroplated on gold anode has saved cost, but its price is still higher.For another example, CN104562078A discloses one kind
Electrode for electrolysis, the electrode for electrolysis include conductive substrate and active coating, and the conductive substrate is to close comprising titanium or titanium
The substrate of gold, the active coating include at least primer coating and surface coating, and the primer coating includes titanium oxide, iridium oxygen
Compound and ru oxide, the surface coating include one of iridium oxide, ru oxide, titanium oxide and palladium, platinum or
The metal or oxide of two kinds of elements.The electrode for electrolysis of the patent document use duplex coating, compared to contain only ruthenium, iridium,
The signal layer coating of titanium, electrode activity is more preferable, and the chlorine evolution potential of electrode is low, and oxygen evolution potential is high, and the service life is longer for electrode,
It is more preferable to be electrolysed stability.But still use titanium or titanium alloy as substrate in the patent document, cause the cost of electrode still
It is higher.
Therefore, at present there is an urgent need to a kind of electrolysis water process units, lower production costs, and in the electrolysis water produced
Substantially free of Cr VI.
Summary of the invention
One of the objects of the present invention is to provide a kind of electrolysis water process units, lower production costs.It is of the invention into
One step is designed to provide a kind of electrolysis water process units, substantially free of Cr VI in the electrolysis water produced, using steady
It is qualitative good.
It is another object of the present invention to provide a kind of electrolysis water producing methods, production cost can be reduced, when long
Between steadily obtain the electrolysis water substantially free of Cr VI.
The inventor of the present application discovered that above-mentioned purpose may be implemented in following technical solution.
The present invention provides a kind of electrolysis water process units comprising shell, diaphragm, first electrode and second electrode；It is described
Diaphragm the shell is divided into the first tank house and the second tank house, the first electrode and second electrode difference
It is arranged in first tank house and second tank house；
The first electrode includes stainless steel substrate, coating of titanium dioxide and the platinum coating containing lanthanum；The titanium dioxide
Coating is arranged in stainless steel substrate outer surface, with a thickness of 5~10 microns；The platinum coating containing lanthanum is arranged in titanium dioxide
Coating outer surface, with a thickness of 3~10 microns；Based on the total weight of the platinum coating containing lanthanum, the platinum coating containing lanthanum contains
The lanthanum of 0.1~5wt%.
Device according to the present invention, it is preferable that the coating of titanium dioxide with a thickness of 6~9 microns；Described
Platinum coating containing lanthanum with a thickness of 5~8 microns；Based on the total weight of the platinum coating containing lanthanum, the platinum coating containing lanthanum contains
The lanthanum of 0.5~3wt%.
Device according to the present invention, it is preferable that the coating of titanium dioxide with a thickness of 7~8 microns；Described
Platinum coating containing lanthanum with a thickness of 6~7 microns；Based on the total weight of the platinum coating containing lanthanum, the platinum coating containing lanthanum contains 1
The lanthanum of~2wt%.
Device according to the present invention, it is preferable that the second electrode includes substrate and coating, the substrate choosing
From stainless steel, titanium or titanium alloy, the coating be selected from platinum, iridium, palladium, tantalum it is one or more.
Device according to the present invention, it is preferable that the diaphragm is the continuous poriferous plasma membrane with water penetration, hole
Diameter is 15~190nm.
Device according to the present invention, it is preferable that the lower part of first tank house is provided with the first water inlet, described
The top of first tank house is provided with the first water outlet；The lower part of second tank house is provided with the second water inlet, and described
The top of two tank houses is provided with the second water outlet.
The present invention also provides the methods using above-mentioned apparatus production electrolysis water comprising electrolysis water process: to the first electrolysis
Room supplies the first water, supplies second of water to the second tank house, applies voltage to first electrode and second electrode, to be formed
Electrolysis water.
Method according to the present invention, it is preferable that the first described water be chloride ion-containing water, described second
Water is tap water.
Method according to the present invention, it is preferable that in the electrolysis water process, the differential water pressures of diaphragm two sides are ±
Within 5.5kPa.
Method according to the present invention, it is preferable that the method further includes the preparation section of first electrode:
(1) stainless steel substrate is polished using the sand paper of 80~110 mesh, by the stainless steel substrate after polishing at 30~45 DEG C
Lower to carry out oil removing with alkaline degreaser immersion, then etch activates 60~80 seconds and obtains pretreating substrates in an acidic solution；
(2) pretreating substrates are placed in the mixed solution of ammonium hexa-fluorotitanate and boric acid formation, at 35~55 DEG C
It takes out and dries after impregnating 10~50 hours, be then heat-treated 50~80 minutes under inert gas protection, at 500~700 DEG C,
The electrode for electrolysis containing coating of titanium dioxide is obtained after natural cooling；Wherein, the hexafluorotitanic acid ammonium concentration in the mixed solution
For 0.2~0.35mol/L and boric acid concentration is 0.2~0.35mol/L；
It (3) is anode using the electrode for electrolysis containing coating of titanium dioxide as cathode, platinum guaze, to include lanthanum compound
Solution with platinum compounds is electroplate liquid, and the platinum coating containing lanthanum is formed on the electrode for electrolysis containing coating of titanium dioxide,
To obtain first electrode；Wherein, the lanthanum compound is selected from lanthanum nitrate or lanthanum chloride；The platinum compounds is selected from two nitrous
Two ammino platinum of base or chloroplatinic acid.
In electrolysis water process units of the invention, the substrate of first electrode is stainless steel material, is closed relative to titanium or titanium
Gold is cheap many.The present invention forms coating of titanium dioxide and platinum coating on stainless steel substrate, and adds lanthanum element, in this way
It ensure that the stability in use of electrode for electrolysis, such as guarantee that the Cr VI in stainless steel will not during prolonged use
It penetrates into electrolysis water.
Detailed description of the invention
Fig. 1 is the electrolysis water process units of embodiment 1.
The reference numerals are as follows: 1- shell, 2- diaphragm, the first tank house of 21-, the second tank house of 22-, the first electricity of 31-
Pole, 32- second electrode, the first water inlet of 41-, the second water inlet of 42-, the first water outlet of 51-, the second water outlet of 52-, 6- electric current
Adjustment unit, 7- power supply.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below, but protection scope of the present invention is not limited to
This.
In the present invention, " stainless steel " indicates that erosion-resisting steel alloy can be supported in air or in chemical attack medium,
Including but not limited to martensitic stain less steel, ferritic stainless steels, austenitic stainless steels, martensitic stain less steel, iron element
Body-austenitic stainless steels.Chromium can be contained in stainless steel of the invention, content can be 12% or more.Other than chromium, this
The elements such as nickel, the molybdenum that steel can be made to be passivated can be added in the stainless steel of invention.
In the present invention, so-called " outer surface that B is arranged in A ", is not that proper A is fully wrapped around by B, A, B
Between there may be relationships that is overlapped, intersecting, interpenetrate.
<electrolysis water process units>
Electrolysis water process units of the invention includes shell, diaphragm, first electrode and second electrode；The diaphragm is by institute
The shell stated is divided into the first tank house and the second tank house, and the first electrode and the second electrode are separately positioned on described
In first tank house and second tank house.Electrolysis water process units of the invention can also include current adjustment unit and electricity
Source.
Shell of the invention can be made of the material of acid-fast alkali-proof, and shape can be rectangular box or irregular
Shape, can be integrally formed or be welded by different baffles.Shell of the invention can be tied for two cell structures, three Room
Structure and multicell structure, preferably two cell structures.The shell is divided into the first tank house and the second electricity by diaphragm of the invention
Solve room.If diaphragm be it is a piece of, for two cell structures；If diaphragm is two panels, for three cell structures；If diaphragm is more than two
Piece is then multicell structure.In the case where diaphragm is two panels or more, medial compartment can be formed between diaphragm, for accommodating electrolysis
Liquid.
In the present invention, the diaphragm can be dielectric film, such as cation-exchange membrane or anion-exchange membrane,
Depending on specific demand.Polyelectrolyte membrane can be used in dielectric film of the invention.The cation that macromolecule is formed
The example of exchange membrane includes but is not limited to NAFION112, NAFION115, NAFION117 of E.I.Du Pont Company, Asahi Glass strain formula meeting
The GORE-SELECT of FLEMION, W.L.Gore&Associates company of the society and ACIPLEX of Asahi Kasei Corporation；
The example for the anion-exchange membrane that macromolecule is formed includes but is not limited to the AHA of ASTOM company, Japan, upper marine water chemical treatment material
Expect the heterogeneous membrane 3362BW of Co., Ltd.
In the present invention, the diaphragm is preferably the continuous poriferous plasma membrane with water penetration.The aperture of multiple aperture plasma membrane can
Think 15~190nm, preferably 50~185nm, more preferably 105~180nm.It, can be with using the multiple aperture plasma membrane in above-mentioned aperture
The differential water pressures of diaphragm two sides are controlled within ± 5.5kPa, to avoid the deterioration of diaphragm, extend diaphragm service life.This hair
Bright multiple aperture plasma membrane can have in face and sterically irregular hole.Continuous poriferous plasma membrane of the invention can be selected from Porous
The porous ceramics films such as glass-film, Porous pellumina, Porous oxidation titanium film, can also selected from Porous polyethylene film,
The Porous polymer films such as Porous polypropylene screen, chloridizing high molecule multiple aperture plasma membrane, fluoropolymer multiple aperture plasma membrane.Of the invention
The example of multiple aperture plasma membrane includes but is not limited to Y-9201T, Y9211T diaphragm of Tang Qian membranous system company, Japan (Yuasa).This hair
Bright multiple aperture plasma membrane can be the stacked film formed by the multiple aperture plasma membrane of different pore size.It is more advantageous to the migration of ion in this way, and
Reduce stress concentration effect.
In the present invention, first electrode includes stainless steel substrate, coating of titanium dioxide and the platinum coating containing lanthanum.Titanium dioxide
Coating is arranged in stainless steel substrate outer surface, with a thickness of 5~10 microns, preferably 6~9 microns, more preferably 7~8 microns.
Platinum coating containing lanthanum is arranged in coating of titanium dioxide outer surface, with a thickness of 3~10 microns, preferably 5~8 microns, more preferably
It is 6~7 microns.Based on the total weight of the platinum coating containing lanthanum, the platinum coating containing lanthanum contain 0.1~5wt%, preferably 0.5~
The lanthanum of 3wt%, more preferably 1~2wt%, most preferably 1.2~1.5wt%.Present inventor is it was unexpectedly observed that in platinum
Increase a small amount of lanthanum element in coating, significantly increase its stability in use, main material is allowed to be that the electrode of stainless steel is made
It is applied to electrolytic water generating device for anode；And it can guarantee during prolonged use, the Cr VI in stainless steel
It does not penetrate into electrolysis water.
In the present invention, second electrode includes substrate and coating.The substrate is selected from stainless steel, titanium or titanium alloy,
The coating be selected from platinum, iridium, palladium, tantalum it is one or more.Preferably, the substrate is selected from stainless steel, it is described
Coating is selected from the one or two of platinum, iridium.A specific embodiment according to the present invention, second electrode are stainless steel electricity
Pole can reduce cost in this way.
In the present invention, the lower part of first tank house is provided with the first water inlet, the top of first tank house
It is provided with the first water outlet；The lower part of second tank house is provided with the second water inlet, and the top of second tank house is set
It is equipped with the second water outlet.First water inlet with the first water inlet pipe for connecting, for the first water to be imported the first tank house；The
One water outlet is connect with the first outlet pipe, the electrolysis water export for that will generate.Second water inlet is used to connect with the second water inlet pipe
It connects, for second of water to be imported the second tank house；Second water outlet is connect with the second outlet pipe, the electrolysis water for will generate
Export.Flow control valve has can be set in first water inlet pipe and the second water inlet pipe, for controlling the flow velocity and hydraulic pressure of water.The
Flow control valve has also can be set in one outlet pipe and the second outlet pipe, for controlling the flow velocity and hydraulic pressure of water.According to this
One specific embodiment of invention, the first water inlet connect with the second water inlet with a water inlet pipe, be used for importing contain chlorine from
The tap water of son.
Electrolysis water process units of the invention can also include current adjustment unit and power supply.Power supply is used for first electrode
Apply voltage with second electrode, current adjustment unit is used to adjust the size of current of electrolytic process.
<electrolysis water producing method>
Electrolysis water producing method of the invention is realized using above-mentioned electrolysis water process units.The method of the present invention includes electricity
Water conservancy project sequence is solved, also may include the preparation section of first electrode.Electrolysis water process includes: to supply the first to the first tank house
Water, supplies second of water to the second tank house, applies voltage to first electrode and second electrode, to form electrolysis water.
In the present invention, the first described water can be the water of chloride ion-containing, such as the electrolyte containing NaCl, contain
The tap water etc. of hypochlorous acid or derivatives thereof.Second of the water can be tap water, such as contain hypochlorous acid or its derivative
The tap water of object.Contain chloride ion and some metal cations, therefore, the first of the invention in common tap water
Water and second of water can be identical, are tap water.By control flow control valve to control to the first tank house supply first
The flow velocity and hydraulic pressure of kind water, and the flow velocity and hydraulic pressure that second of water is supplied to the second tank house are controlled, to regulate and control diaphragm two sides
Differential water pressures.When using multiple aperture plasma membrane, can by the differential water pressures of diaphragm two sides be ± 5.5kPa within, preferably ± 3kPa with
It is interior, within more preferably ± 1kPa.In this way stability in use can be improved to avoid the deterioration of multiple aperture plasma membrane.
It opens power supply and voltage is applied to first electrode and second electrode, it, can be by voltage by adjusting current adjustment unit
Control is in 3~5V, preferably 3.5~5V, more preferably 4~5V；Can by current control in 15~30A, preferably 20~
28A, more preferably 22~25V.
During electrolysis water, anion is migrated by diaphragm to anode, and cation passes through diaphragm to cathodic migration, thus
Rich anion-containing electrolysis water (acid water) is formed in the first tank house, and forms the electrolysis rich in cation in the second tank house
Water (alkaline water).Rich anion-containing electrolysis water is exported by the first water outlet and by the first outlet pipe；Electricity rich in cation
Xie Shui is exported by the second water outlet and by the second outlet pipe.
The preparation section of first electrode of the invention includes the following steps:
(1) stainless steel substrate is polished using the sand paper of 80~110 mesh, by the stainless steel substrate after polishing at 30~45 DEG C
Lower to carry out oil removing with alkaline degreaser immersion, then etch activates 60~80 seconds and obtains pretreating substrates in an acidic solution；
(2) pretreating substrates are placed in the mixed solution of ammonium hexa-fluorotitanate and boric acid formation, at 35~55 DEG C
It takes out and dries after impregnating 10~50 hours, be then heat-treated 50~80 minutes under inert gas protection, at 500~700 DEG C,
The electrode for electrolysis containing coating of titanium dioxide is obtained after natural cooling；Wherein, the hexafluorotitanic acid ammonium concentration in the mixed solution
For 0.2~0.35mol/L and boric acid concentration is 0.2~0.35mol/L；
It (3) is anode using the electrode for electrolysis containing coating of titanium dioxide as cathode, platinum guaze, to include lanthanum compound
Solution with platinum compounds is electroplate liquid, and the platinum coating containing lanthanum is formed on the electrode for electrolysis containing coating of titanium dioxide,
To obtain first electrode；Wherein, the lanthanum compound is selected from lanthanum nitrate or lanthanum chloride；The platinum compounds is selected from two nitrous
Two ammino platinum of base or chloroplatinic acid.
In step (1) of the invention, the bruting process of stainless steel substrate can be polished using sand paper, can also be using thin
Sand polishing.When polishing using sand paper, the sand paper of 80~110 mesh can be used, it is preferred to use the sand paper of 90~100 mesh.
In step (1) of the invention, the stainless steel substrate alkaline degreaser after polishing is impregnated to remove surface
Oily matter.Soaking temperature can control at 30~45 DEG C, and preferably 35~40 DEG C.Soaking time is not particularly limited, with
The oily matter removal of stainless steel substrate surface is completely limited.Alkaline degreaser of the invention can be for containing 10~35g/L phosphorus
The aqueous solution of sour trisodium and 5~13g/L sodium metasilicate preferably contains the water of 15~30g/L tertiary sodium phosphate and 6~11g/L sodium metasilicate
Solution more preferably contains the aqueous solution of 20~25g/L tertiary sodium phosphate and 8~10g/L sodium metasilicate.Acid solution of the invention includes
10~20wt% nitric acid, 30~40wt% hydrochloric acid and 45~55wt% water, preferably include 12~18wt% nitric acid, 32~38wt%
Hydrochloric acid and 46~52wt% water more preferably include 15~17wt% nitric acid, 33~35wt% hydrochloric acid and 49~51wt% water.Its
In, the weight percent of nitric acid is with HNO3It calculates, the weight percent of hydrochloric acid is calculated with HCl.One according to the present invention specific
Embodiment, acid solution of the invention are made of 10~20wt% nitric acid, 30~40wt% hydrochloric acid and 45~55wt% water.
In step (1) of the invention, by the stainless steel substrate after oil removal treatment, etch is activated in an acidic solution, etch
Activation temperature can carry out at room temperature.Etch activation time can control at 60~80 seconds, and preferably 65~75 seconds.Etch is living
The purpose of change is so that the stainless steel surface quasi- solution for forming coating of titanium dioxide easy to attach.
In step (2) of the invention, hexafluorotitanic acid ammonium concentration can be 0.2~0.35mol/L, preferably 0.25~
0.3mol/L；Boric acid concentration can be 0.2~0.35mol/L, preferably 0.25~0.3mol/L.In the present invention, temperature is impregnated
Preferably 38~52 DEG C, more preferably 40~45 DEG C of degree；Soaking time is preferably 15~30 hours, and more preferably 20~25 is small
When.In order to guarantee that coating of titanium dioxide is evenly distributed on stainless steel substrate, above-mentioned heat treatment can be under inert gas protection
It carries out.Inert gas can be selected from nitrogen, argon gas and helium etc..The temperature of heat treatment is preferably 550~650 DEG C, more preferably
580~600 DEG C；Heat treatment time is preferably 55~75 minutes, and more preferably 60~70 minutes.By the stainless base steel after heat treatment
Material cooled to room temperature obtains the electrode for electrolysis containing coating of titanium dioxide.What is obtained in this way contains coating of titanium dioxide more
Dense uniform.
In step (3) of the invention, electroplate liquid of the invention is the solution comprising lanthanum compound and platinum compounds.This hair
Bright " solution " indicates the mixture that plated material and solvent are formed.Above-mentioned lanthanum compound is water-soluble lanthanum salt, can be selected from
Lanthanum nitrate or lanthanum chloride, preferably lanthanum nitrate.Above-mentioned platinum compounds is water-soluble platinum salt, can be selected from two ammino of dinitroso
Platinum (NH3)2Pt(NO2)2·H2O, chloroplatinic acid H2PtCl6·6H2O etc., preferably two ammino platinum of dinitroso.
A specific embodiment according to the present invention, the electroplate liquid includes following component:
Specific embodiment according to another preferred, the electroplate liquid are grouped as by following group:
Preferred embodiment according to the present invention, the electroplate liquid include following component:
Preferred embodiment according to another preferred, the electroplate liquid are made of said components.
Further preferred specific embodiment according to the present invention, the electroplate liquid include following component:
Specific embodiment further preferred according to another preferred, the electroplate liquid is by said components group
At.
Step (3) of the invention can carry out in the electroplating device of this field routine, and which is not described herein again.In the present invention
The step of (3) in, cathode-current density can be 1~3A/dm2, preferably 1.5~2A/dm2；Anode and cathode spacing can be 0.6
~1.5cm, preferably 0.8~1.0cm；Tank voltage can be 2~5V, preferably 3~3.5V；The pH value of electroplate liquid can be
It 9.5~11.5, is preferably 10~11；Electroplating temperature is 80~95 DEG C, preferably 85~90 DEG C；Electroplating time can be 10~50
Hour, preferably 20~30 hours.
<measurement of the content of 6-valence Cr ions in water>
(1) using the content of 6-valence Cr ions in the diphenyl carbazide spectrophotometry detection water of GB7467-1987；
(2) using the content of 6-valence Cr ions in water with ion chromatography, specific steps are referring to " ion-chromatographic determination is drunk
Cr VI in water ", Hu Zhongyang etc., the 14th national ion chromatography symposium collection of thesis, on September 17th, 2012.
The preparation section of preparation example 1- first electrode A1
(1) stainless steel substrate is polished using the sand paper of 90 mesh, by the stainless steel substrate after polishing with alkalinity at 35 DEG C
Degreaser, which impregnates, carries out oil removing.Alkaline degreaser is the aqueous solution of tertiary sodium phosphate containing 22g/L and 9g/L sodium metasilicate.After oil removing
Stainless steel substrate obtains pretreating substrates after etch activates 70 seconds in an acidic solution.Acid solution be 17wt% nitric acid,
The solution that 33wt% hydrochloric acid and 50wt% water are formed.
(2) mixing for the pretreating substrates being placed in 0.25mol/L ammonium hexa-fluorotitanate and the formation of 0.25mol/L boric acid is molten
It in liquid, takes out and dries after being impregnated 25 hours at 40 DEG C, be then heat-treated 60 minutes under nitrogen protection, at 600 DEG C, it is natural
The electrode for electrolysis containing coating of titanium dioxide is obtained after cooling.
(3) it is anode using the electrode for electrolysis containing coating of titanium dioxide as cathode, platinum guaze, is plating with following solution
Liquid forms the platinum coating containing lanthanum in the first electrode containing coating of titanium dioxide:
Plating conditions are as follows: cathode-current density 2A/dm2, anode and cathode spacing be 1cm, tank voltage 3V, electroplate liquid
PH value is 10, and electroplating temperature is 85 DEG C and electroplating time is 20 hours.
First electrode A1 is prepared by preparation example 1.The first electrode is by stainless steel substrate, coating of titanium dioxide and contains
The platinum coating of lanthanum forms.Through detecting, coating of titanium dioxide with a thickness of 7 microns, the platinum coating containing lanthanum with a thickness of 6 microns,
In the lanthanum containing 1.5wt%.
The preparation section of preparation example 2- first electrode A2
The lanthanum nitrate dosage of preparation example 1 is replaced with into 0.5g/L by 0.63g/L, remaining condition is identical as preparation example 1, preparation
Obtain first electrode A2.The first electrode is made of stainless steel substrate, coating of titanium dioxide and platinum coating containing lanthanum.Through detecting,
Coating of titanium dioxide with a thickness of 7 microns, the platinum coating containing lanthanum with a thickness of 6 microns, wherein the lanthanum containing 1.2wt%.
Embodiment 1
Fig. 1 shows a kind of electrolysis water process units of the invention.As seen from the figure, which includes shell 1, diaphragm 2,
One electrode 31 and second electrode 32；Shell 2 is divided into the first tank house 21 and the second tank house 22, first electrode 31 by diaphragm 1
It is separately positioned in the first tank house 21 and the second tank house 22 with second electrode 32.The device further includes current adjustment unit 6
With power supply 7.Power supply 7 is used to apply voltage to first electrode 31 and second electrode 32, and current adjustment unit 6 is for adjusting electric current.
The first electrode A1 that first electrode 31 is obtained using preparation example 1；Diaphragm 2 is the continuous poriferous plasma membrane with water penetration, aperture
150nm, for example, by using the Y-9201T diaphragm of Japanese Tang Qian membranous system company (Yuasa).
The lower part of first tank house 21 is provided with the first water inlet 41, and upper part is provided with the first water outlet 51；Second electricity
The lower part of solution room 22 is provided with the second water inlet 42, and upper part is provided with the second water outlet 52.First water inlet 41 and first into
Water pipe connection (not shown), for the first water to be imported the first tank house 21；First water outlet 51 (is not schemed with the first outlet pipe
Show) connection, the electrolysis water export for that will generate.Second water inlet 42 is connect with the second water inlet pipe (not shown), for by the
Two kinds of water import the second tank house 22；Second water outlet 52 is connect with the second outlet pipe (not shown), the electrolysis for will generate
Water export.First water inlet pipe and the second water inlet pipe are provided with flow control valve, for controlling the flow velocity and hydraulic pressure of water.First
Outlet pipe and the second outlet pipe are provided with flow control valve, for controlling the flow velocity and hydraulic pressure of water.
When the device is used, preferred that tap water is supplied to the first tank house 21 by the first water inlet 41, and pass through
Second water inlet 42 supplies tap water to the second tank house 22, adjusts flow control valve so that the differential water pressures of 2 two sides of diaphragm are
Within ± 5kPa；Voltage, voltage 5V, electric current 25A are applied to first electrode 31 and second electrode 32；The acidic electrolysis of generation
Water is exported from the first water outlet 51, and the electrolyzed alkaline water of generation is exported from the second water outlet 52.
Using the content of 6-valence Cr ions in diphenyl carbazide spectrophotometry and water with ion chromatography.In continued electrolysis
After water carries out 3000 hours, Cr VI is still not detected in the water of generation.
Embodiment 2
Other than first electrode 31 is replaced with the first electrode A2 that preparation example 2 obtains, other conditions and 1 phase of embodiment
Together.
Using the content of 6-valence Cr ions in diphenyl carbazide spectrophotometry and water with ion chromatography.In continued electrolysis
After water carries out 3000 hours, Cr VI is still not detected in the water of generation.
Embodiment 3
Other than diaphragm 2 to be replaced with to cation-exchange membrane (NAFION 117 of E.I.Du Pont Company), other conditions and reality
It is identical to apply example 1.
Using the content of 6-valence Cr ions in diphenyl carbazide spectrophotometry and water with ion chromatography.In continued electrolysis
After water carries out 3000 hours, Cr VI is still not detected in the water of generation.
Embodiment 4
Other than diaphragm 2 to be replaced with to anion-exchange membrane (AHA of Japanese ASTOM company), other conditions and implementation
Example 1 is identical.
Using the content of 6-valence Cr ions in diphenyl carbazide spectrophotometry and water with ion chromatography.In continued electrolysis
After water carries out 3000 hours, Cr VI is still not detected in the water of generation.
Embodiment 5
In addition to diaphragm 2 is replaced with the anion-exchange membrane (heterogeneous membrane of Shanghai Water-Treatment Material Co., Ltd., Shanghai
Except 3362BW), other conditions are same as Example 1.
Using the content of 6-valence Cr ions in diphenyl carbazide spectrophotometry and water with ion chromatography.In continued electrolysis
After water carries out 3000 hours, Cr VI is still not detected in the water of generation.
Present invention is not limited to the embodiments described above, without departing from the essence of the present invention, this field skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within the scope of the present invention.
Claims (3)
1. a kind of method of electrolysis water process units production electrolysis water, which is characterized in that the device include shell, diaphragm,
First electrode and second electrode；The shell is divided into the first tank house and the second tank house by the diaphragm, and described
One electrode and the second electrode are separately positioned in first tank house and second tank house；The first electrode packet
Include stainless steel substrate, coating of titanium dioxide and the platinum coating containing lanthanum；The coating of titanium dioxide is arranged outside stainless steel substrate
Surface, with a thickness of 5~10 microns；The described platinum coating setting containing lanthanum in coating of titanium dioxide outer surface, with a thickness of 3~
10 microns；Based on the total weight of the platinum coating containing lanthanum, the platinum coating containing lanthanum contains the lanthanum of 0.1~5wt%；
The method includes electrolysis water process: supplying the first water to the first tank house, supplies second to the second tank house
Water applies voltage to first electrode and second electrode, to form electrolysis water；
The method further includes the preparation section of first electrode:
(1) stainless steel substrate is polished using the sand paper of 80~110 mesh, the stainless steel substrate after polishing is used at 30~45 DEG C
Alkaline degreaser, which impregnates, carries out oil removing, and then etch activates 60~80 seconds and obtains pretreating substrates in an acidic solution；The alkali
Property degreaser be the aqueous solution containing 10~35g/L tertiary sodium phosphate and 5~13g/L sodium metasilicate；The acid solution include 10~
20wt% nitric acid, 30~40wt% hydrochloric acid and 45~55wt% water；
(2) pretreating substrates are placed in the mixed solution of ammonium hexa-fluorotitanate and boric acid formation, are impregnated at 35~55 DEG C
It takes out and dries after 10~50 hours, be then heat-treated 50~80 minutes under inert gas protection, at 500~700 DEG C, it is natural
The electrode for electrolysis containing coating of titanium dioxide is obtained after cooling；Wherein, the hexafluorotitanic acid ammonium concentration in the mixed solution is 0.2
~0.35mol/L and boric acid concentration are 0.2~0.35mol/L；
It (3) is anode using the electrode for electrolysis containing coating of titanium dioxide as cathode, platinum guaze, to include lanthanum compound and platinum
The solution of compound is electroplate liquid, and the platinum coating containing lanthanum is formed on the electrode for electrolysis containing coating of titanium dioxide, thus
Obtain first electrode；
In step (3), the electroplate liquid includes following component:
In step (3), cathode-current density is 1~3A/dm2, anode and cathode spacing is 0.6~1.5cm, and tank voltage is 2~5V,
The pH value of electroplate liquid is 9.5~11.5, and electroplating temperature is 80~95 DEG C and electroplating time is 10~50 hours.
2. according to the method described in claim 1, it is characterized by: the first described water be chloride ion-containing water, it is described
Second of water is tap water.
3. the method according to claim 1, wherein in the electrolysis water process, the differential water pressures of diaphragm two sides
Within ± 5.5kPa.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423270A (en) * | 2008-10-09 | 2009-05-06 | 张学东 | Electric pole material of high efficiency electrocatalysis high-grade oxidation technology |
| CN103088363A (en) * | 2012-12-13 | 2013-05-08 | 苏州新区化工节能设备厂 | Preparation method of stainless steel electrolysis electrode with titanium dioxide coating layer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423270A (en) * | 2008-10-09 | 2009-05-06 | 张学东 | Electric pole material of high efficiency electrocatalysis high-grade oxidation technology |
| CN103088363A (en) * | 2012-12-13 | 2013-05-08 | 苏州新区化工节能设备厂 | Preparation method of stainless steel electrolysis electrode with titanium dioxide coating layer |
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