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WO1993020917A1 - Procede et systeme de traitement de liquides - Google Patents

Procede et systeme de traitement de liquides Download PDF

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Publication number
WO1993020917A1
WO1993020917A1 PCT/FI1993/000162 FI9300162W WO9320917A1 WO 1993020917 A1 WO1993020917 A1 WO 1993020917A1 FI 9300162 W FI9300162 W FI 9300162W WO 9320917 A1 WO9320917 A1 WO 9320917A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
hquid
processed
pump
gas
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.)
Ceased
Application number
PCT/FI1993/000162
Other languages
English (en)
Inventor
Viljo JÄRVENPÄÄ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wiser Oy
Original Assignee
Wiser Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wiser Oy filed Critical Wiser Oy
Priority to JP5518027A priority Critical patent/JPH07505571A/ja
Priority to EP93908969A priority patent/EP0637260A1/fr
Publication of WO1993020917A1 publication Critical patent/WO1993020917A1/fr
Priority to NO943966A priority patent/NO943966L/no
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1431—Dissolved air flotation machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B03D1/028—Control and monitoring of flotation processes; computer models therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1412—Flotation machines with baffles, e.g. at the wall for redirecting settling solids
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00162—Controlling or regulating processes controlling the pressure

Definitions

  • the present invention relates to a procedure for processing liquids, such as for oxidizing, flotating, or processing in other ways, in which procedure
  • the invention also relates to a means for treating, such as for oxidizing, flotating, or processing in some other desired way liquids, with which means
  • the hquids may contain difficult components and solid agents which should be separated therefrom, in particular if the hquids are pumped.
  • the pumps will otherwise wear and may be blocked.
  • Endeavours have usually been made to eliminate the problems like these using a filter on the suction side of the pump. It depends on the quality and quantity of the solid agents, how well said filter operates and how long it is kept open. Cleaning filters continuously is not sensible, either. Therre are instances also in industrial applications in which no method is available for pumping Hquids because the impurities contained in the Hquid block aU generaHy known and used filters.
  • Circulating a Hquid in a container into a reaction target and back causes in several cases great difficulties.
  • One of the problems is e.g. how to get the Hquid quantity in the entire container mixed uniforrnly, how to bring the entire Hquid into a reaction target and to get the entire Hquid amount mixed with a reacting component.
  • difficulties arise in how to ensure the homo ⁇ geneity of the discharging Hquid and as great purity as possible from e.g. soHd agents. Therefore, e.g. in the industry so-caUed batch processes exist for produc- ing a homogeneous product. Even in such cases it is customary to filter the product.
  • An object of the invention is to provide an improvement in methods and means currently known in the art for processing Hquids.
  • a more detailed aim of the invention is to provide a method and a means which is particularly well appropriate e.g. for oxidizing, flotating or processing Hquid in another desired method.
  • the aims of the invention are achieved by means of a method which is charac terized in that in the method
  • the means according to the invention is characterized in that the means is provided with a suction system for conducting at least part of the Hquid to be processed as a suction flow into a pump, that said pump has been arranged to draw air / gas / Hquid as a flow into a suction flow so that in the pressure caused by said pump the air / gas / Hquid is dissolved in said pump, and on the discharge side thereof, into a circulation flow, possibly reacting with the reactable components in said circulation flow, and that said pump has been arranged to return at least part of the processed circulating flow into the Hquid to be proc ⁇ essed.
  • the Hquid to be processed can be brought into tubular circulation from a container when the suction point is on the so-caUed clean side of the pump, into the suction opening whereof a re ⁇ quisite component is fed controUedly, in addition to the Hquid to be processed, such as reducing or oxidizing gas / Hquid, whereafter the components of the dis ⁇ charge side, entered in the pump, are aUowed to react / dissolve at a controUed pressure with themselves before being returned through a dispersing nozzle into a solution in the container to be reacted / circulated further whHe part of the solution is discharged from the circulation cycle e.g. in an amount equivalent to the feed out or for further reaction.
  • a re ⁇ quisite component is fed controUedly
  • the components of the dis ⁇ charge side, entered in the pump are aUowed to react / dissolve at a controUed pressure with themselves before being returned through a dispersing nozzle into a solution in
  • Fig. 1 presents an advantageous embodiment of a means design used in the method of the invention as a schematical cross-section image.
  • Fig. 2 presents an embodiment of a second preferred means design used in the method of the invention as a schematical cross-section image.
  • the means used in the procedure of the invention is in general indicated by reference numeral 10.
  • the means 10 is provided with a cover 11 through which a pipe 12 leads for conducting in a Hquid to be proc ⁇ essed in the form of an in-flow A.
  • the upper surface a of the Hquid is usuaUy preferably in the proximity of the cover 11.
  • the lower end of the pipe 12 is provided with a flange 13, from the outer edge of which rises a cone 14 and its extensions 14a so that the upper edge of the extension 14a of the cone 14 re ⁇ mains sufficiently below the Hquid surface a.
  • the extension 14a of the cone 14 is preferably a cyHndrical surface.
  • the pipe 12 is surrounded by a second pipe 15, this being preferably a concentric pipe.
  • the pipe 15 extends lower than the upper edge of the extension 14a of the cone 14 into the Hquid.
  • a perforated ring 16 In the adjacency of the upper edge of the extension 14a of the cone 14 is placed a perforated ring 16, extending to the pipe 15.
  • the perforated ring 16 is preferably a sheet metal ring.
  • the perforated ring 16 has been sup ⁇ ported both to the extension 14a of the cone 14 and to the pipe 15.
  • the suction part of the suction pipe 18 of the pump 17 being preferably a suction ring 18, in order to equalize the suction in the Hquid space.
  • the Hquid flow flowing in the suction pipe 18 is indicated by K.
  • a second suction pipe 20 with control valves 20a has been connected so that the suction flow B entering along the pipe 20 can be controlled as desired.
  • the channel 21 which can be quite long.
  • the channel 21 ends in an equalization chamber 22, with which e.g. extra, non-dissolved gas can be removed if necessary or if desired.
  • the Hquid flow continues its flow from the channel 21 along a pipe 23 either back into the circulation along the pipe 24 as a flow K or preferably con ⁇ troUed by a Hquid surface height monitor 25, through a control valve 24a into the discharge flow C.
  • a control valve or a potential back pressure valve 29 can be inserted witi ⁇ n the suction pipe 18 with which a vacuum pressure of desired magnitude can be provided on the suction side of the pump 17 in order to produce a desired flow B.
  • the Hquid / solution flowing back in the pipe 24 is pressured / controUed to be appropriate in pressure with a dispersion nozzle 26, positioned preferably at the lower mouth of the pipe 12 either thereabove or therebelow.
  • a dispersion nozzle 26 positioned preferably at the lower mouth of the pipe 12 either thereabove or therebelow.
  • the solution / Hquid to be processed may contain desired mix compo- nents or additions so that the solution / dissolved gas discharging from the dispersion nozzle is immediately made to mix / react with the Hquid flow A to be processed.
  • the pressure provided by the dispersion nozzle 26 can be control ⁇ led e.g. by counterpressure, in the present embodiment by means of compressed air b of the control valve 27.
  • air / gas / Hquid can be thus drawn into the pump 17 through a suction connector provided with a control valve 20a as a flow B, from which e.g. the air is released in a volume after the dispersion nozzle 26 in an amount which is in proportion to the pressure as an extremely fine, nearly molecular, dispersion, usuaUy gathering into greater bubbles tending at the same time to adhere to the soHd matter particles in the Hquid and/or in the Hquid impurities.
  • the impurities contained in the Hquid to be processed become thus flotated, i.e. they arise onto the surface of the Hquid to be pro ⁇ Deadd.
  • the truly heavy soHd matter components go downwards past the disper- sion nozzle 26.
  • the gaseous bubbles and impurity components attached thereto rise towards the surface at their own speed.
  • the impurity components rising to the surface form foam 28 on the surface of the Hquid, which is removed as a flow D in a manner known in itseH in the art.
  • Fig. 2 The embodiment in Fig. 2 is otherwise similar to that in Fig. 1, except that th cover 11 in the embodiment as shown in Fig. 2 is connected to a container 30 the size thereof being selected according to the cone 14 used therein.
  • Circulation flow K discharging as uniformly as possible in aU directions from th dispersion nozzle 26 is extremely great in speed.
  • an inflow A is mixed after the dispersion nozzle 26.
  • the flows K an A constitute a flow F which is directed upwards in the space between th container 30 and the extension 14a of the cone 14 at a desired speed.
  • Said Hqui flow F is equalized with the aid of a perforated ring 16, whereby the magnitud of the flow G directed downwards through the perforated ring 16 is so sma that the solid matter within the air bubbles will not follow along with the flow Therethrough the Hquid entering the suction ring 19 can be purified from soli agents.
  • the discharge point of the purified Hquid is indicated by E, and it i drawn from the space between the pipes 12 and 15.
  • the flow C can be conducted into a further process such a into a wet washer, whereby the dissolved oxygen / chemicals contained in th flow C react to / wash gases and dusts as desired, returning into the circulatio water container 30 in the form of flow A or as part thereof, containing impur ities which are purified with the means design 10 according to the invention
  • Hquid may have to be removed from the circulation as a flow E, bein drawn from the annular space between the pipes 12 and 15, but said Hquid to b removed has, however, undergone a purification process simflar to the flow K of the Hquid entering the pump 17.
  • the flow C may similarly be conducte into a further process.
  • the design of the invention can be used for several purposes: for instance, fo sulphur removal from flue gases, in which the flow C enters the washer, therein dissolving into itself e.g. SO 2 gas, that is, sulphur dioxide.
  • SO 2 gas that is, sulphur dioxide.
  • This kind of dissolved sulphur dioxide becomes oxidized with the oxygen prevailing in the flow B drawn into the pump 17 into sulphur trioxide SO 3 , and further, into sulphuric acid because an aqueous solution is in question.
  • part of the flow C may be carried directly into further processing of sulphuric acid, where the sulphuric acid can, if needed, be processed or concentrated in a desired manner.
  • Flow C, re-entering totaUy or partly the washer contains no S0 2 gas in dissolved form and it is therefore prepared to dissolve again new sulphur dioxide in itself.
  • the design according to the invention can be used for flotation e.g. in paper industry in manufacttiring recycled paper in the flotation process of black printing ink.
  • the residual waters contain syanides, phenols, humus, etc., which can be oxidized by appropriate chemical additions in the feed flow A.
  • the iron in the drinking waters is in f erro form, which with the design of the invention can be eliminated easUy utilizing appropriately the pH range in the feeding A.
  • the invention is in no way critical regarding the flow B, but How B can be any gas / chemical, because of which the design of the invention has a wide usage and appHcation range.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Procédé et système de traitement de liquides, par exemple par oxydation, par flottage ou par un autre traitement approprié. Selon le procédé, on introduit (A) le liquide à traiter dans un premier volume (12). On introduit dans ce premier volume (12), ou dans un volume situé immédiatement au-dessous de celui-ci, le liquide de dispersion et le fluide (air/gaz/liquide) dissous dans celui-ci, afin de mélanger l'un à l'autre le liquide à traiter et le liquide de dispersion renfermant le fluide. Le mélange ainsi obtenu contient des bulles et on le met en écoulement ascendant de manière que les impuretés s'accumulent au niveau d'une surface de suspension (28). Au moins une partie du liquide à traiter est aspirée (K') par une pompe (17). Le fluide est entraîné en écoulement (B) par la pompe (17) et s'introduit dans le liquide aspiré (K'), de manière que le fluide, dont la pression est égale à celle produite par la pompe (17), se dissolve dans la pompe (17) et, au niveau du côté de décharge de celle-ci, dans le liquide en écoulement (K). Il peut éventuellement réagir avec les constituants réactifs du liquide en écoulement (K). Au moins une partie du liquide traité en écoulement (K) est réintroduit par la pompe (17) dans le liquide à traiter.
PCT/FI1993/000162 1992-04-21 1993-04-20 Procede et systeme de traitement de liquides Ceased WO1993020917A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP5518027A JPH07505571A (ja) 1992-04-21 1993-04-20 液体処理の方法と手段
EP93908969A EP0637260A1 (fr) 1992-04-21 1993-04-20 Procede et systeme de traitement de liquides
NO943966A NO943966L (no) 1992-04-21 1994-10-19 Fremgangsmåte og anordning for behandling av væsker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI921754A FI90397C (fi) 1992-04-21 1992-04-21 Menetelmä ja laite nesteiden käsittelemiseksi
FI921754 1992-04-21

Publications (1)

Publication Number Publication Date
WO1993020917A1 true WO1993020917A1 (fr) 1993-10-28

Family

ID=8535148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1993/000162 Ceased WO1993020917A1 (fr) 1992-04-21 1993-04-20 Procede et systeme de traitement de liquides

Country Status (7)

Country Link
EP (1) EP0637260A1 (fr)
JP (1) JPH07505571A (fr)
AU (1) AU3954693A (fr)
CA (1) CA2133958A1 (fr)
FI (1) FI90397C (fr)
NO (1) NO943966L (fr)
WO (1) WO1993020917A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004202A1 (fr) * 1994-08-02 1996-02-15 Wiser Oy Procede et installation de recuperation et de traitement du dioxyde de soufre dans les gaz d'echappement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI95211C (fi) * 1994-04-05 1996-01-10 Wiser Oy Menetelmä ja laitteisto flotaatiolaitokseen tai vastaavaan johdettavan puhdistettavan nestevirtauksen käsittelemiseksi

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106172A1 (de) * 1980-02-20 1982-03-18 MTA Müszaki Kémiai Kutató Intézet, Veszprém Verfahren zur realisierung und intensivierung des waerme- und/oder stoffaustausches zwischen fluessigkeiten sowie fluessigkeit und feststoff und mischdiffusor zur durchfuehrung des verfahrens
WO1990010597A1 (fr) * 1989-03-06 1990-09-20 Wiser Oy Appareil d'epuration d'eau
WO1991016267A1 (fr) * 1990-04-19 1991-10-31 Wiser Oy Procede et dispositif de nettoyage des eaux de bassins, notamment de pisciculture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106172A1 (de) * 1980-02-20 1982-03-18 MTA Müszaki Kémiai Kutató Intézet, Veszprém Verfahren zur realisierung und intensivierung des waerme- und/oder stoffaustausches zwischen fluessigkeiten sowie fluessigkeit und feststoff und mischdiffusor zur durchfuehrung des verfahrens
WO1990010597A1 (fr) * 1989-03-06 1990-09-20 Wiser Oy Appareil d'epuration d'eau
WO1991016267A1 (fr) * 1990-04-19 1991-10-31 Wiser Oy Procede et dispositif de nettoyage des eaux de bassins, notamment de pisciculture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004202A1 (fr) * 1994-08-02 1996-02-15 Wiser Oy Procede et installation de recuperation et de traitement du dioxyde de soufre dans les gaz d'echappement

Also Published As

Publication number Publication date
FI921754A0 (fi) 1992-04-21
JPH07505571A (ja) 1995-06-22
EP0637260A1 (fr) 1995-02-08
FI90397C (fi) 1994-02-10
NO943966D0 (no) 1994-10-19
NO943966L (no) 1994-10-19
FI90397B (fi) 1993-10-29
AU3954693A (en) 1993-11-18
CA2133958A1 (fr) 1993-10-28

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