CA1232231A - Apparatus for electrochemical purification of contaminated liquids - Google Patents
Apparatus for electrochemical purification of contaminated liquidsInfo
- Publication number
- CA1232231A CA1232231A CA000464540A CA464540A CA1232231A CA 1232231 A CA1232231 A CA 1232231A CA 000464540 A CA000464540 A CA 000464540A CA 464540 A CA464540 A CA 464540A CA 1232231 A CA1232231 A CA 1232231A
- Authority
- CA
- Canada
- Prior art keywords
- froth
- pipe
- chamber
- liquid
- collector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/047—Breaking emulsions with separation aids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/06—Separation of liquids from each other by electricity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
-
- 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
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2001/46157—Perforated or foraminous electrodes
Abstract
APPARATUS FOR ELECTROCHEMICAL PURI-FICATION OF CONTAMINATED LIQUIDS
Abstract An apparatus is proposed for electrochemical puri-fication of contaminated liquids which comprises a settl-ing chamber with a froth collector and an injector dis-posed above this settling chamber, the interior of the settling chamber accommodating an electrocoagulation cham-ber separated from the settling chamber by an annular parti-tion. Secured in the lower part of the electrocoagulation chamber are consumable electrodes.
According to one aspect of the invention, the appa-ratus is provided with a mixing tank communicating by way of a froth duct with the froth collector hermetically connected to the annular partition.
Abstract An apparatus is proposed for electrochemical puri-fication of contaminated liquids which comprises a settl-ing chamber with a froth collector and an injector dis-posed above this settling chamber, the interior of the settling chamber accommodating an electrocoagulation cham-ber separated from the settling chamber by an annular parti-tion. Secured in the lower part of the electrocoagulation chamber are consumable electrodes.
According to one aspect of the invention, the appa-ratus is provided with a mixing tank communicating by way of a froth duct with the froth collector hermetically connected to the annular partition.
Description
~3~23~
Apparels Brie ~LEC'~ROCHE~ICAL
PYRE I CONTAMINATED LIQUIDS
D I rye ~VE~IrTI~M
he invention relates generally to the art of liquid purification, and more particularly to apparatus or eye-ctrochemical purification ox r30ntaminated liquids INDUSTRIAL PACKABLE
Roy device according to the inventiQ~ can wind up-placation for purifying liquids contaminated by various impurities soluble in water, suck as organic mutters-lid Suspensors, and the like.
Roy apparatus owe toe invention may be utilized wit the utmost advantage for purifying liquids polluted by pew trillium products and polymer, such as industrial sewage containing oils and polym~thyl me~hacrylates.
BACKGROUND OF TOE INVENTION
Among thy presently kiwi devices or purifying contaminated liquids an ever increasing use have found lay tell apparatuses or electrochemical purification of it-rids due to their high process eschews particularly apparatuses capable ox e~ec~i~g electrocoagulation and electro~lotatio~ waste water treatment processes.
There are kiwi apparatuses for carrying out electron chemical purification ox contaml~a~ed liquid in inter-mitten or in continuous modes ox opera, the latter appearing to be more promising.
23~
Owe such apparatus comprises a settling chamber wit arranged Cole inside this chamber an electrocoagula-lion chamber, a system OX consumable electrodes, pipe o'er weeding a contaminated liquid and discharging the purified liquid, and a means or removing Wright prom the apparatus I US. Pat. No ~505,188; Of. 204~149~ published 1970 he Wright removing Mooney it this apparatus has the or ox a rotating scraper arranged in the top part of the settling chamber This structural arrangement of' the means or remove in froth wastes provides or part ox such wastes to be forced by the scraper into the liquid occupying the settle in chamber Jo be enwind by the flow of purified liquid and thus carried away prom the apparatus, which, of course affects the quality ox purification and consequently the efficiency ox the apparatus Also known is an apparatus for electrochemical treat-mint recontaminated Lockwood (¢~/ e.g., USSR Inventor's Certificate No 914,506; IPC C 02 7/46, published 1982) comprising a settling chamber with pipes for discharging the purified liquid and wastes, the settling chamber be-in communicable with an electrocoagula~ion chamber en-ranged Cole wherein and hazing in the bottom part thereon a system ox consumable electrodes and a pipe for weeding a contaminated liquid to this chamber at a toga-lion substantially above the consumable electrodes, and a pipe for feeding an electrolyte, eye apparatus further comprises a mean or evacuating froth waste having a ~.~3223~
froth collector and a rotatable tube disposed above the settling chamber and provided with an air injector and a unwell at one end thereof.
he apparatus a en continuous evacuation from the settling clamber of Roth wastes venerated during co-adulation of contaminants by metal hydroxides in toe eye-ctrocoagulation chamber.
However, the means or evacuating froth wastes from the Ahab known apparatus is disadvantageous because of its operating complete? and the need or a drive to rotate the froth collector, which puts limitations on the effi-Chinese of the apparatus. In addition, Jo provision is en-visage or repeated use ox the Roth wastes or preclean-in ox the contaminated liquid Burr it is Ted to the apparatus.
SUGARY Ox THE I~V~TION
It it therefore a object of the present invention to provide an apparatus for electrochemical treatment of contaminated liquids of such a construction as to prevent the compaction ox contaminants and sedimentation of their fractions in the liquid being purred Another object is to provide for the reuse ox us-reacted metal hydroxide present it the waste to thereby make the purification process more stable, increase the efficiency ox the apparatus, and bring down expenditures associated with operation of the apparatus.
These objects and other attending advantages are ox-~;2;3;22~
twined by that ill an apparatus for electrochemical puff-ficatio~ of co~tamiLlated liquids comprising a settling chamber having pipes or discharging the purified liquid and wastes disposed at the top and bottom portion err, respectively, a froth collects all art air in Hector over-lying this chamber, an electrocoagulation chamfer arranged inside the settling chamber Cole therewith and sepal rated there~xom by an anrLular partition, toe lower part ox the electrocoagulation chamber accommodating consumable electrodes resting substantially above a pipe for feediLlg an electrolyte, a header connected to a line for weeding the contaminated liquid being disposed over these elect-nodes, according to the invention the apparatus is pro-voided with a mixing tall communicable by a Roth duct with the froth collector which is hermetically connected Jo the annular partition.
This arrangement assure continuous removal prom the settling chamber of wastes wormed during coagulation ox contami~atiLl~ particles by electrochemically obtained metal hydroxides taking place in the elactrocoagulation chamber.
A a result, these wastes fail to accumulate it the settling chamber and are removed through the Roth duct to the mixing tank receiving continuously the con-laminated liquid. Therewith, the wastes are utilized in the mixing tank a a jilter bed through which the conic-minuted liquid is caused to pass, whereas part of the us-reacted metal hydroxides present in the wastes act to ~Z3~;23~
additionally coagulate contaminating particles of toe liquid supplied for treatment which enables to pretreat the contaminated liquid prior to conveying it to the eye-ctrocoagulation chamber to improve the efficiency ox the apparatus by up to 16%, seduce the amount ox electric power expended or the process and slow down the rate of dissolution ox the metal of the consumable electrodes.
Prefer Al the Roth collector is provided wit air vets having valves, and the top part of the annular par-tuition is disposed in said Roth collector with a clearance relative to its inside surface defining therewith a annular cavity, this top part of the annular partition also pie-drably having a tapered shoulder conforming in shape to the shape of the froth collector.
he provision ox the valved air vents in the froth collector makes it possible to save on the energy required for operation of the apparatus thanks to injection of we-sues from the upper part of the settling chamber by the atmospheric air.
he tapered guiding shoulder ox the -top of the annul-en partition serves to reduce the likelihood of waste de-position on the idea surface ox the Roth collector and prevent fouling of the surface ox the no consumable elect-nodes it the settling chamber, whereby a waving of prom 8 to 12 I in operating cysts can be attained, Advisably, the interior ox the froth duct is pro-voided with a insert in the Norm of an Archimedean screw to facilitate the travel of wastes prom the settling champ ~.232;~3~
bier to the mixing tank, the outside ox this froth duct being preferably enclosed by a steam jacket having a pipe for weeding a mineral acid.
Toe Archimedes screw envi~5orates the process ox separation ox froth wastes into components, such as oil, water and air 9 and consequently enables to make these wastes lest voluminous.
The separation ox Roth wastes inside the froth duct proceeds most ~avourably at a temperature ox between 35 and 80C, depending on the type ox contaminants and physical structure ox the wastes wormed during the puff-cation process. treating the wastes thermally speeds up such separation and enables to use the Roth duct ox a shorter length to make the apparatus more efficient.
For correcting acidic or alkaline properties ox the contaminated liquid prior to the electrochemical treat-met, a mineral acid is added through the pipe mounted on the Roy duct until a required pi value ox the liquid it attained. this also provides a beneficial elf cat or the coagulation process where electrochemically induced metal hydroxides act on the disperse system, Prey drably 9 the bottom ox toe Meg tank commune-cater through a pipe with a recirculation live for feed-in the contaminated Lowe to thy electrocoagulation Camaro. It is also advisable to provide this mixing tank in i is upper part with pipes f or f ceding the contaminated liquid and discharging the wastes.
'the implement of the mixing tank allows a repeated Z32~3~
use ox toe Roth wastes accumulating at the top of the settling chamber and containing aggregates of co~tami-wants coagulated with the me tat hydroxides and some us-reacted metal hydroxides in the course ox the initial put rakish to use the hydroxides or preliminary cogwheel-Shea ox the contaminant. side eject ox the wastes supplied to the Meg tank is that they are used as a jilter bed where through the incoming contaminated Liquid is sprayed while the reacted metal hydroxides keg-late the impurities contained in the liquid to thus assure precleaning ox the liquid prior to it being supplied to the electrocoagulatio~ chamber, which results in a still better efficiency of the apparatus and higher degree ox purification BRIEF DESCRIPTION I THE ACCOMPA~YI~
DRAWINGS
he invention will now be described in greater de-jail with reverence to various pesky embodiments the-Roy taken in conjunction with the accompanying drawings the sole figure ox which represents a general sectional view ox an apparatus or electroc~emical pyrrhic ox contaminated liquids.
BEST My I CARRYING OUT THE INV~TIOW
A apparatus or electrochemical purification ox contaminated liquids comprises disposed coccal a sell-lint chamber 1 and an electrocoagulation chamber 2 muds up of two detachable sectioQsO
;;L2;~Z~3 he lower section ox the electrocoagulatio~ clamber
Apparels Brie ~LEC'~ROCHE~ICAL
PYRE I CONTAMINATED LIQUIDS
D I rye ~VE~IrTI~M
he invention relates generally to the art of liquid purification, and more particularly to apparatus or eye-ctrochemical purification ox r30ntaminated liquids INDUSTRIAL PACKABLE
Roy device according to the inventiQ~ can wind up-placation for purifying liquids contaminated by various impurities soluble in water, suck as organic mutters-lid Suspensors, and the like.
Roy apparatus owe toe invention may be utilized wit the utmost advantage for purifying liquids polluted by pew trillium products and polymer, such as industrial sewage containing oils and polym~thyl me~hacrylates.
BACKGROUND OF TOE INVENTION
Among thy presently kiwi devices or purifying contaminated liquids an ever increasing use have found lay tell apparatuses or electrochemical purification of it-rids due to their high process eschews particularly apparatuses capable ox e~ec~i~g electrocoagulation and electro~lotatio~ waste water treatment processes.
There are kiwi apparatuses for carrying out electron chemical purification ox contaml~a~ed liquid in inter-mitten or in continuous modes ox opera, the latter appearing to be more promising.
23~
Owe such apparatus comprises a settling chamber wit arranged Cole inside this chamber an electrocoagula-lion chamber, a system OX consumable electrodes, pipe o'er weeding a contaminated liquid and discharging the purified liquid, and a means or removing Wright prom the apparatus I US. Pat. No ~505,188; Of. 204~149~ published 1970 he Wright removing Mooney it this apparatus has the or ox a rotating scraper arranged in the top part of the settling chamber This structural arrangement of' the means or remove in froth wastes provides or part ox such wastes to be forced by the scraper into the liquid occupying the settle in chamber Jo be enwind by the flow of purified liquid and thus carried away prom the apparatus, which, of course affects the quality ox purification and consequently the efficiency ox the apparatus Also known is an apparatus for electrochemical treat-mint recontaminated Lockwood (¢~/ e.g., USSR Inventor's Certificate No 914,506; IPC C 02 7/46, published 1982) comprising a settling chamber with pipes for discharging the purified liquid and wastes, the settling chamber be-in communicable with an electrocoagula~ion chamber en-ranged Cole wherein and hazing in the bottom part thereon a system ox consumable electrodes and a pipe for weeding a contaminated liquid to this chamber at a toga-lion substantially above the consumable electrodes, and a pipe for feeding an electrolyte, eye apparatus further comprises a mean or evacuating froth waste having a ~.~3223~
froth collector and a rotatable tube disposed above the settling chamber and provided with an air injector and a unwell at one end thereof.
he apparatus a en continuous evacuation from the settling clamber of Roth wastes venerated during co-adulation of contaminants by metal hydroxides in toe eye-ctrocoagulation chamber.
However, the means or evacuating froth wastes from the Ahab known apparatus is disadvantageous because of its operating complete? and the need or a drive to rotate the froth collector, which puts limitations on the effi-Chinese of the apparatus. In addition, Jo provision is en-visage or repeated use ox the Roth wastes or preclean-in ox the contaminated liquid Burr it is Ted to the apparatus.
SUGARY Ox THE I~V~TION
It it therefore a object of the present invention to provide an apparatus for electrochemical treatment of contaminated liquids of such a construction as to prevent the compaction ox contaminants and sedimentation of their fractions in the liquid being purred Another object is to provide for the reuse ox us-reacted metal hydroxide present it the waste to thereby make the purification process more stable, increase the efficiency ox the apparatus, and bring down expenditures associated with operation of the apparatus.
These objects and other attending advantages are ox-~;2;3;22~
twined by that ill an apparatus for electrochemical puff-ficatio~ of co~tamiLlated liquids comprising a settling chamber having pipes or discharging the purified liquid and wastes disposed at the top and bottom portion err, respectively, a froth collects all art air in Hector over-lying this chamber, an electrocoagulation chamfer arranged inside the settling chamber Cole therewith and sepal rated there~xom by an anrLular partition, toe lower part ox the electrocoagulation chamber accommodating consumable electrodes resting substantially above a pipe for feediLlg an electrolyte, a header connected to a line for weeding the contaminated liquid being disposed over these elect-nodes, according to the invention the apparatus is pro-voided with a mixing tall communicable by a Roth duct with the froth collector which is hermetically connected Jo the annular partition.
This arrangement assure continuous removal prom the settling chamber of wastes wormed during coagulation ox contami~atiLl~ particles by electrochemically obtained metal hydroxides taking place in the elactrocoagulation chamber.
A a result, these wastes fail to accumulate it the settling chamber and are removed through the Roth duct to the mixing tank receiving continuously the con-laminated liquid. Therewith, the wastes are utilized in the mixing tank a a jilter bed through which the conic-minuted liquid is caused to pass, whereas part of the us-reacted metal hydroxides present in the wastes act to ~Z3~;23~
additionally coagulate contaminating particles of toe liquid supplied for treatment which enables to pretreat the contaminated liquid prior to conveying it to the eye-ctrocoagulation chamber to improve the efficiency ox the apparatus by up to 16%, seduce the amount ox electric power expended or the process and slow down the rate of dissolution ox the metal of the consumable electrodes.
Prefer Al the Roth collector is provided wit air vets having valves, and the top part of the annular par-tuition is disposed in said Roth collector with a clearance relative to its inside surface defining therewith a annular cavity, this top part of the annular partition also pie-drably having a tapered shoulder conforming in shape to the shape of the froth collector.
he provision ox the valved air vents in the froth collector makes it possible to save on the energy required for operation of the apparatus thanks to injection of we-sues from the upper part of the settling chamber by the atmospheric air.
he tapered guiding shoulder ox the -top of the annul-en partition serves to reduce the likelihood of waste de-position on the idea surface ox the Roth collector and prevent fouling of the surface ox the no consumable elect-nodes it the settling chamber, whereby a waving of prom 8 to 12 I in operating cysts can be attained, Advisably, the interior ox the froth duct is pro-voided with a insert in the Norm of an Archimedean screw to facilitate the travel of wastes prom the settling champ ~.232;~3~
bier to the mixing tank, the outside ox this froth duct being preferably enclosed by a steam jacket having a pipe for weeding a mineral acid.
Toe Archimedes screw envi~5orates the process ox separation ox froth wastes into components, such as oil, water and air 9 and consequently enables to make these wastes lest voluminous.
The separation ox Roth wastes inside the froth duct proceeds most ~avourably at a temperature ox between 35 and 80C, depending on the type ox contaminants and physical structure ox the wastes wormed during the puff-cation process. treating the wastes thermally speeds up such separation and enables to use the Roth duct ox a shorter length to make the apparatus more efficient.
For correcting acidic or alkaline properties ox the contaminated liquid prior to the electrochemical treat-met, a mineral acid is added through the pipe mounted on the Roy duct until a required pi value ox the liquid it attained. this also provides a beneficial elf cat or the coagulation process where electrochemically induced metal hydroxides act on the disperse system, Prey drably 9 the bottom ox toe Meg tank commune-cater through a pipe with a recirculation live for feed-in the contaminated Lowe to thy electrocoagulation Camaro. It is also advisable to provide this mixing tank in i is upper part with pipes f or f ceding the contaminated liquid and discharging the wastes.
'the implement of the mixing tank allows a repeated Z32~3~
use ox toe Roth wastes accumulating at the top of the settling chamber and containing aggregates of co~tami-wants coagulated with the me tat hydroxides and some us-reacted metal hydroxides in the course ox the initial put rakish to use the hydroxides or preliminary cogwheel-Shea ox the contaminant. side eject ox the wastes supplied to the Meg tank is that they are used as a jilter bed where through the incoming contaminated Liquid is sprayed while the reacted metal hydroxides keg-late the impurities contained in the liquid to thus assure precleaning ox the liquid prior to it being supplied to the electrocoagulatio~ chamber, which results in a still better efficiency of the apparatus and higher degree ox purification BRIEF DESCRIPTION I THE ACCOMPA~YI~
DRAWINGS
he invention will now be described in greater de-jail with reverence to various pesky embodiments the-Roy taken in conjunction with the accompanying drawings the sole figure ox which represents a general sectional view ox an apparatus or electroc~emical pyrrhic ox contaminated liquids.
BEST My I CARRYING OUT THE INV~TIOW
A apparatus or electrochemical purification ox contaminated liquids comprises disposed coccal a sell-lint chamber 1 and an electrocoagulation chamber 2 muds up of two detachable sectioQsO
;;L2;~Z~3 he lower section ox the electrocoagulatio~ clamber
2 project from the settling chamber 1 and accommodate consumable electrode 3. The two section of the electron coagulation chamber 2 are spaced prom each other to pro vise for an annular clearance 4 there between, these two section being interconnected by a common header 5 the interior ox which communicate with a pipe 6 or weeding the contaminated liquid.
Arranged between toe settling cna~ber 1 and electron coagulation chamber 2 is an annular separating partition 7 intended to extend the -travel path of the liquid being purified in Ike settling chamber 1. Perforate nonconsum-able electrodes 8 are imposed below the level ox rid substantially horizontally in a space defined by the walls of the electrocoagulation chamber 2 and annular partition Overlying the electrocoagulation chamber 2 is Roth collector 9 defined by a tapered insert 10 Hermes tidally connected to the annular partition 7. the Roth collector 9 has air vents 11 with valves 12 disposed above thy level of liquid it the settling chamber I
e upper part ox the annular partition 7 is mounted in the Roth collector 9 with a clearance 13 relative to its inside Ursa to Norm an annular cavity 14 con-netted by a pipeline 15 waving a valve 16 to the pipe 17 or weeding electrolyte to the lower section of the eye-ctrocoag~lation chamfer Z. A tapered guide shoulder I
conforming in shape to the shape of the froth collector ~Z3~3 _ 9 9 it provided in the upper part of the annular partition he top ox the froth collector 9 is communicated with a Meg tan 21 through a Roth duct 20~ The froth duct 20 it arranged above the Roth collector and include an injector 22 facing by its nozzle toward the mixing tank 21~ as well as an insert I it the form ox an urchin median scrod, and a pipe 24 or feeding a mineral acid.
The Roth duct 20 it enclosed on the outside by a steam jacket 25 having pipe 26 and 27 or weeding a heat-trans-for agent and discharging a condensate, respectively.
Disposed inside the mixing tank 21 above the toga-lion where the Roth duct 20 is convected thereto is a pipe 28 or supplying the contaminated liquid terminating in a liquid spray meats 29. The interior ox the mixing tank 21 accommodates a horizontal perorated partition 30 to separate wastes from the liquid, whereas overlying this partition 30 is a pipe 31 or removing the wastes from the Meg tank 21, the bottom part of the mixing tank 21 being convected by way Of a pipe 32 and a line 33 to the pipe 6 for weeding the contaminated liquid to the electrocoa~ulatio~ chamber 2.
The settling clamber 1 is-also provided with pipes 34 and 35 or discharge the purified Lowe and sludge, respectively The apparatus for electrochemical purification of contaminated liquid operates in the following manner Error to starting the purification process the in-~3;~3~
tenor ox the electrocoagula-tion chamber 2 and settling chamber l axe willed with an electrolyte (such as technic-ally pure water or water containing small amounts ox awl thereafter a voltage is applied to -toe electrodes and or the electric current passing through electrolyte Jo.
cause anodic dissolution of the electrodes and appearance thereon and on the nonco~sumable electrodes 8 ox gas buy-blest In the course ox anodic dissolution ox the electrodes
Arranged between toe settling cna~ber 1 and electron coagulation chamber 2 is an annular separating partition 7 intended to extend the -travel path of the liquid being purified in Ike settling chamber 1. Perforate nonconsum-able electrodes 8 are imposed below the level ox rid substantially horizontally in a space defined by the walls of the electrocoagulation chamber 2 and annular partition Overlying the electrocoagulation chamber 2 is Roth collector 9 defined by a tapered insert 10 Hermes tidally connected to the annular partition 7. the Roth collector 9 has air vents 11 with valves 12 disposed above thy level of liquid it the settling chamber I
e upper part ox the annular partition 7 is mounted in the Roth collector 9 with a clearance 13 relative to its inside Ursa to Norm an annular cavity 14 con-netted by a pipeline 15 waving a valve 16 to the pipe 17 or weeding electrolyte to the lower section of the eye-ctrocoag~lation chamfer Z. A tapered guide shoulder I
conforming in shape to the shape of the froth collector ~Z3~3 _ 9 9 it provided in the upper part of the annular partition he top ox the froth collector 9 is communicated with a Meg tan 21 through a Roth duct 20~ The froth duct 20 it arranged above the Roth collector and include an injector 22 facing by its nozzle toward the mixing tank 21~ as well as an insert I it the form ox an urchin median scrod, and a pipe 24 or feeding a mineral acid.
The Roth duct 20 it enclosed on the outside by a steam jacket 25 having pipe 26 and 27 or weeding a heat-trans-for agent and discharging a condensate, respectively.
Disposed inside the mixing tank 21 above the toga-lion where the Roth duct 20 is convected thereto is a pipe 28 or supplying the contaminated liquid terminating in a liquid spray meats 29. The interior ox the mixing tank 21 accommodates a horizontal perorated partition 30 to separate wastes from the liquid, whereas overlying this partition 30 is a pipe 31 or removing the wastes from the Meg tank 21, the bottom part of the mixing tank 21 being convected by way Of a pipe 32 and a line 33 to the pipe 6 for weeding the contaminated liquid to the electrocoa~ulatio~ chamber 2.
The settling clamber 1 is-also provided with pipes 34 and 35 or discharge the purified Lowe and sludge, respectively The apparatus for electrochemical purification of contaminated liquid operates in the following manner Error to starting the purification process the in-~3;~3~
tenor ox the electrocoagula-tion chamber 2 and settling chamber l axe willed with an electrolyte (such as technic-ally pure water or water containing small amounts ox awl thereafter a voltage is applied to -toe electrodes and or the electric current passing through electrolyte Jo.
cause anodic dissolution of the electrodes and appearance thereon and on the nonco~sumable electrodes 8 ox gas buy-blest In the course ox anodic dissolution ox the electrodes
3 metal hydroxides, such as Lowe or Foe, tend to Norm in the pure electrolyte, which hydroxides are carried by the bubbles ox gas to the surface ox -the electrolyte inside the Ruth collector 9 to accumulate therein and be forced away prom the Roth layer by compressed air escape in from the injector 22 through the Roth duct 20 to the mixing tank 21~
Aster a while, toe supply to the apparatus ox a con-laminated liquid through the spray 29 is initiated. When it is necessary to correct the pi value ox the contaminate Ed liquid, a predetermined amount ox mineral acid, such as HC19 is added through the pipe 24.
Interaction in the mixing tank 21 ox contaminant particles with metal hordes leads to the ~ormatiou ox sizable aggregates of such particles tending to accumulate above the perorated partition I to be thereafter removed through the pipe lo this results in the growth in the mixing tank 21 ox an additional inter Ted composed ox coagulated aggregates the contaminated liquid partially ~;~3ZZ3~
cleaned ox conta~llinants in the mixing tank 21 is convey-Ed along the line I and pipe 6 Jo thy annular clearance
Aster a while, toe supply to the apparatus ox a con-laminated liquid through the spray 29 is initiated. When it is necessary to correct the pi value ox the contaminate Ed liquid, a predetermined amount ox mineral acid, such as HC19 is added through the pipe 24.
Interaction in the mixing tank 21 ox contaminant particles with metal hordes leads to the ~ormatiou ox sizable aggregates of such particles tending to accumulate above the perorated partition I to be thereafter removed through the pipe lo this results in the growth in the mixing tank 21 ox an additional inter Ted composed ox coagulated aggregates the contaminated liquid partially ~;~3ZZ3~
cleaned ox conta~llinants in the mixing tank 21 is convey-Ed along the line I and pipe 6 Jo thy annular clearance
4 and thereafter to the interior ox the elec-trocoagula-lion chamber 2 immediately above the system of consume able electrodes at a certain distance therefrom.
Contaminants which are still present in the liquid now occupying the electrocoagulation clamber 2 interact with particles of metal hydroxide capable ox active sorb-lion capacity and carried by the ascending slow of the electrolyte awry aggregates produced by coagulation are gloated toward the surface of toe liquid in the settling chamber l. This action is greatly facilitated by the gas bubbles produced by the electrodes I.
oh containing aggregates ox coagulated impure-ties and some metal hydroxides which failed to interact are conveyed by compressed air escaping prom the injector I prom the froth collector 9 along the froth duct 20 to the mixing tank 21~
When the Roth wastes are conveyer along the Roth duct 20 provided with the ionizer 23 in the Norm of Arch-median screw, they are vigorously separated into gas an liquid containing water, contaminants 5 and metal hydra-tides. For Easter and more e~iclent separation of wastes it is preferable to treat the thermally by supplying a heat transfer agent to the jacket 25 enclosing the froth duct 20 trough the pipe 26 and discharging the condensate through the pipe 27. 'wherewith, thermal conditions for treating the wastes are determined by the type ox contamina-~23~3~L
-- 12 _ Zion (oil, polymers, etc.) and is maintained accordingly within a range ox prom 35 to 90C~
he purified liquid passes through the perorated nv~corlsumable electrodes 8 and is discharged prom the settling chamber 1 through the pipe OWE Some contaminants are additionally carried upwards with the gas emitted by the non consumable electrodes 8 toward the surface ox the liquid to further enhance purification. Sludge accv.~
mutated in the Seattle chamber 1 is periodically discharge Ed through the pipe 35.
he kowtows removal ox froth wastes prom the froth collector 9 along the Roth dust 20 to the mixing tank 21 enables to e~ecb precleaning ox the contaminated liquid Ted whereinto through the spray 29, which provides more favorable operating conditions In vie ox the arguing, the apparatus or eye-ctrochemical purification of contaminated liquids provides for e~icien-t separation ox contaminants during coagulation by metal hydroxides produced electrochemically.
Concurrently 9 the reuse ox Roth wastes containing a certain percentage ox unrequited metal hydroxides for precleaning the contaminated liquid enables to reduce the amount ox impurities therein prior lo -the treatment.
this affords to still further increase the eschews of the apparatus and reduce opera in costs.
Also, no substances are deposited on toe consumable electrodes due to their dissolution it the pure electrolyte, which promotes high rate of anodic dissolution ox the ~232~3~
electrodes Another advantage includes substantially no-duped deposition of froth waste on the inside surface of the froth collector thank to their continuous removal by the air injector producing a certain amount of under-pressure inside the froth collector to result in a hither degree ox purification.
urethra the use of Wastes in -the Mecca task for the purpose ox liquid purification it greatly enhanced by virtue of their separation into liquid and gaseous phase en during their passage through the froth duct, the liquid phase being utilized in the mixing tank as a filter bed as this bed is sprayed by the contaminated liquid. In ad-diction, the unrequited metal hydroxides act to coagulate toe contaminating particles.
he processes may be still further invigorated by treating the wastes thermally in the froth duct and add-in a mineral acid to maintain an optimum pi value of the liquid being purified.
he proposed apparatus provides a 12 to 16 % in-crease in the efficiency ox liquid puxi~ication processes due to precleaning, requires less electric power and disk solvable metal of the consumable electrodes for the pro-cuss, increases the degree of purification to between 99.3 % and 99.8%~ and requires smaller amount of metal to be expended for this manufacture
Contaminants which are still present in the liquid now occupying the electrocoagulation clamber 2 interact with particles of metal hydroxide capable ox active sorb-lion capacity and carried by the ascending slow of the electrolyte awry aggregates produced by coagulation are gloated toward the surface of toe liquid in the settling chamber l. This action is greatly facilitated by the gas bubbles produced by the electrodes I.
oh containing aggregates ox coagulated impure-ties and some metal hydroxides which failed to interact are conveyed by compressed air escaping prom the injector I prom the froth collector 9 along the froth duct 20 to the mixing tank 21~
When the Roth wastes are conveyer along the Roth duct 20 provided with the ionizer 23 in the Norm of Arch-median screw, they are vigorously separated into gas an liquid containing water, contaminants 5 and metal hydra-tides. For Easter and more e~iclent separation of wastes it is preferable to treat the thermally by supplying a heat transfer agent to the jacket 25 enclosing the froth duct 20 trough the pipe 26 and discharging the condensate through the pipe 27. 'wherewith, thermal conditions for treating the wastes are determined by the type ox contamina-~23~3~L
-- 12 _ Zion (oil, polymers, etc.) and is maintained accordingly within a range ox prom 35 to 90C~
he purified liquid passes through the perorated nv~corlsumable electrodes 8 and is discharged prom the settling chamber 1 through the pipe OWE Some contaminants are additionally carried upwards with the gas emitted by the non consumable electrodes 8 toward the surface ox the liquid to further enhance purification. Sludge accv.~
mutated in the Seattle chamber 1 is periodically discharge Ed through the pipe 35.
he kowtows removal ox froth wastes prom the froth collector 9 along the Roth dust 20 to the mixing tank 21 enables to e~ecb precleaning ox the contaminated liquid Ted whereinto through the spray 29, which provides more favorable operating conditions In vie ox the arguing, the apparatus or eye-ctrochemical purification of contaminated liquids provides for e~icien-t separation ox contaminants during coagulation by metal hydroxides produced electrochemically.
Concurrently 9 the reuse ox Roth wastes containing a certain percentage ox unrequited metal hydroxides for precleaning the contaminated liquid enables to reduce the amount ox impurities therein prior lo -the treatment.
this affords to still further increase the eschews of the apparatus and reduce opera in costs.
Also, no substances are deposited on toe consumable electrodes due to their dissolution it the pure electrolyte, which promotes high rate of anodic dissolution ox the ~232~3~
electrodes Another advantage includes substantially no-duped deposition of froth waste on the inside surface of the froth collector thank to their continuous removal by the air injector producing a certain amount of under-pressure inside the froth collector to result in a hither degree ox purification.
urethra the use of Wastes in -the Mecca task for the purpose ox liquid purification it greatly enhanced by virtue of their separation into liquid and gaseous phase en during their passage through the froth duct, the liquid phase being utilized in the mixing tank as a filter bed as this bed is sprayed by the contaminated liquid. In ad-diction, the unrequited metal hydroxides act to coagulate toe contaminating particles.
he processes may be still further invigorated by treating the wastes thermally in the froth duct and add-in a mineral acid to maintain an optimum pi value of the liquid being purified.
he proposed apparatus provides a 12 to 16 % in-crease in the efficiency ox liquid puxi~ication processes due to precleaning, requires less electric power and disk solvable metal of the consumable electrodes for the pro-cuss, increases the degree of purification to between 99.3 % and 99.8%~ and requires smaller amount of metal to be expended for this manufacture
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. an apparatus For electrochemical purification of contaminated liquids comprising: a settling chamber;
a pipe for discharging the purified liquid arranged in the top portion of said settling chamber; a pipe for dis-charging wastes disposed at the top of said settling cham-ber; a froth collector with an injector secured above said settling chamber;an electrocoagulation chamber ar-ranged inside said settling chamber coaxially therewith and separated therefrom by an annular partition hermetic-ally connected to said froth collector; consumable elect-rodes disposed in the bottom portion of said electrocoagu-lation chamber; a pipe for feeding an electrolyte disposed under said consumable electrodes; a header secured above said consumable electrodes; a pipe for feeding the conta-minated liquid communicable with said header, and a mix-ing tank communicable by a froth duct with said froth collector.
a pipe for discharging the purified liquid arranged in the top portion of said settling chamber; a pipe for dis-charging wastes disposed at the top of said settling cham-ber; a froth collector with an injector secured above said settling chamber;an electrocoagulation chamber ar-ranged inside said settling chamber coaxially therewith and separated therefrom by an annular partition hermetic-ally connected to said froth collector; consumable elect-rodes disposed in the bottom portion of said electrocoagu-lation chamber; a pipe for feeding an electrolyte disposed under said consumable electrodes; a header secured above said consumable electrodes; a pipe for feeding the conta-minated liquid communicable with said header, and a mix-ing tank communicable by a froth duct with said froth collector.
2. An apparatus as defined in claim 1, in which said froth collector is provided with air vents having valves.
3. An apparatus as defined in claim 1, in which the top part of said annular partition is disposed inside said froth collector with a clearance relative to its inside surface to define an annular cavity, said top part of said partition having a tapered guide shoulder conforming in shape to the shape of said froth collector.
4. An apparatus as defined in claim 1, in which said froth duct is provided with an insert in the form of an Archimedean screw and is embraced on the outside by a steam jacket.
5. An apparatus as defined in claim 1, in which said mixing tank in its bottom portion is connected by a pipe to a recirculation line for feeding the contaminated liquid to said electrocoagulation chamber and is further provided in its top portion with pipes for feeding the contaminated liquid thereinto and discharging separated wastes therefrom.
6. An apparatus as defined in any of the claims 1 or 5, in which said liquid feeding pipe of said mixing tank disposed in the top part thereof has a spray means, whereas the interior of said mixing tank accommodates a perforated partition arranged substantially below the level at which said froth duct is connected thereto.
7. An apparatus as defined in any of the claims 1 or 4, in which said froth has a pipe for feeding a mineral acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SU1984/000025 WO1985005097A1 (en) | 1984-05-08 | 1984-05-08 | Apparatus for electrochemical purification of polluted liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1232231A true CA1232231A (en) | 1988-02-02 |
Family
ID=21616846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000464540A Expired CA1232231A (en) | 1984-05-08 | 1984-10-02 | Apparatus for electrochemical purification of contaminated liquids |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS61502038A (en) |
| AT (1) | AT391679B (en) |
| CA (1) | CA1232231A (en) |
| DE (2) | DE3490699C2 (en) |
| FI (1) | FI855161A0 (en) |
| FR (1) | FR2571629B1 (en) |
| SE (1) | SE453825B (en) |
| WO (1) | WO1985005097A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3684489A4 (en) * | 2017-09-22 | 2021-03-17 | Exterran Water Solutions ULC | Secondary-phase separation apparatus and a method thereof |
| WO2021130416A1 (en) * | 2019-12-23 | 2021-07-01 | Biobros Oy | Method and arrangement for purifying aqueous solution |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3933857C2 (en) * | 1989-10-07 | 1994-09-29 | Rwo Masch Armaturen App | Method and device for the electrolytic separation of an oil-in-water emulsion in a tubular cell |
| CA2046195A1 (en) * | 1990-11-08 | 1992-05-09 | Wayne J. Chamblee | Foam removal from receiving tanks of gas sparged hydrocyclones |
| EP0686604A1 (en) * | 1994-06-09 | 1995-12-13 | KLOSE ABWASSERTECHNIK GmbH | Device for waste water purification by electroflotation |
| FR2723324B1 (en) * | 1994-08-02 | 1996-10-04 | Mouvex | DRY DEGASSING METHOD AND DEVICE FOR LIQUID DISPENSING PLANT |
| DE4443297C1 (en) * | 1994-12-06 | 1996-03-07 | Hdw Nobiskrug Gmbh | Emulsion splitting by electro:coagulation, flotation and decanting |
| FR2735793B1 (en) * | 1995-06-26 | 1997-08-29 | Debillemont Paul | DEVICE FOR ELECTROLYTIC TREATMENT OF EFFLUENTS |
| DE19532476A1 (en) * | 1995-09-02 | 1997-03-06 | Winfried Prof Dr Schmidt | Oil-contg. waste water treatment, esp. for separating oil-in-water emulsions |
| NL1014806C2 (en) * | 2000-03-31 | 2001-10-02 | Aqua Consult & Design B V | Electrochemical apparatus for separating solids from water, using electrochemical reactor with rotating electrodes, followed by flotation chamber also containing electrodes |
| MA30113B1 (en) * | 2007-05-28 | 2009-01-02 | Abdelhafid Essadki | ELECTROCOAGULATION / ELECTROFLOTATION IN AN EXTERNAL BUCKLE GAZOSIPHON REACTOR FOR THE TREATMENT OF POLLUTED WATER |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3505188A (en) * | 1965-06-18 | 1970-04-07 | Fairbanks Morse Inc | Electrolytic flotation method and apparatus |
| US3552571A (en) * | 1969-10-01 | 1971-01-05 | Fmc Corp | Electroflotation apparatus |
| SU644738A1 (en) * | 1977-08-23 | 1979-01-30 | Харьковский Ордена Ленина И Ордена Октябрьской Революции Моторостроительный Завод "Серп И Молот" | Apparatus for electrochemical purification of waste water |
| SU967959A1 (en) * | 1978-08-09 | 1982-10-23 | Харьковский Ордена Ленина И Ордена Октябрьской Революции Моторостроительный Завод "Серп И Молот" | Apparatus for electrochemically purifying contaminated liquor |
| CH651815A5 (en) * | 1980-06-25 | 1985-10-15 | Kh Polt I Im V I Lenina | Apparatus for electrochemical cleaning of effluent |
| DD160828A3 (en) * | 1981-05-12 | 1984-04-11 | Kh Motorostroitelny | APPARATUS FOR THE ELECTROCHEMICAL CLEANING OF POLLUTED FLUIDS |
| CH650418A5 (en) * | 1982-04-07 | 1985-07-31 | Kh Polt I Im V I Lenina | Apparatus for electrochemical cleaning of effluent |
-
1984
- 1984-05-08 AT AT0907584A patent/AT391679B/en active
- 1984-05-08 JP JP59503764A patent/JPS61502038A/en active Pending
- 1984-05-08 WO PCT/SU1984/000025 patent/WO1985005097A1/en active Application Filing
- 1984-05-08 DE DE19843490699 patent/DE3490699C2/en not_active Expired
- 1984-05-08 DE DE19843490699 patent/DE3490699T/en active Pending
- 1984-10-02 CA CA000464540A patent/CA1232231A/en not_active Expired
- 1984-10-15 FR FR8415788A patent/FR2571629B1/en not_active Expired
-
1985
- 1985-12-27 FI FI855161A patent/FI855161A0/en not_active Application Discontinuation
-
1986
- 1986-01-07 SE SE8600050A patent/SE453825B/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3684489A4 (en) * | 2017-09-22 | 2021-03-17 | Exterran Water Solutions ULC | Secondary-phase separation apparatus and a method thereof |
| WO2021130416A1 (en) * | 2019-12-23 | 2021-07-01 | Biobros Oy | Method and arrangement for purifying aqueous solution |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61502038A (en) | 1986-09-18 |
| FR2571629A1 (en) | 1986-04-18 |
| SE8600050L (en) | 1986-01-07 |
| FI855161A (en) | 1985-12-27 |
| ATA907584A (en) | 1990-05-15 |
| SE8600050D0 (en) | 1986-01-07 |
| SE453825B (en) | 1988-03-07 |
| AT391679B (en) | 1990-11-12 |
| FR2571629B1 (en) | 1987-02-27 |
| DE3490699T (en) | 1986-04-24 |
| FI855161A0 (en) | 1985-12-27 |
| WO1985005097A1 (en) | 1985-11-21 |
| DE3490699C2 (en) | 1988-07-28 |
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