EP0366992B1 - A method and an arrangement for the continuous diluting of a concentrated solution - Google Patents

A method and an arrangement for the continuous diluting of a concentrated solution Download PDF

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Publication number
EP0366992B1
EP0366992B1 EP89118969A EP89118969A EP0366992B1 EP 0366992 B1 EP0366992 B1 EP 0366992B1 EP 89118969 A EP89118969 A EP 89118969A EP 89118969 A EP89118969 A EP 89118969A EP 0366992 B1 EP0366992 B1 EP 0366992B1
Authority
EP
European Patent Office
Prior art keywords
concentrated solution
diluting liquid
tank
diluting
main tank
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 - Lifetime
Application number
EP89118969A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0366992A1 (en
Inventor
Anders Abrahamsson
Bengt Rosberg
Nils Wendestam
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.)
Profor AB
Original Assignee
Profor AB
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 Profor AB filed Critical Profor AB
Priority to AT89118969T priority Critical patent/ATE83945T1/de
Publication of EP0366992A1 publication Critical patent/EP0366992A1/en
Application granted granted Critical
Publication of EP0366992B1 publication Critical patent/EP0366992B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying

Definitions

  • the present invention relates to a method for the continuous diluting of a concentrated solution by means of a continuous flow of diluting liquid.
  • the invention also relates to an arrangement intended for the same.
  • Concentrated solutions of different types occur in many different branches of industry and the handling of these concentrated solutions always involves problems and risks of material damage and personal injuries.
  • a portion of the solutions can be drawn off via a drain and be dealt with in a conventional purifying works, if prior to drawing off they have been diluted to a very low concentration.
  • Other solutions are not suitable for drawing off via a drain, but they may become easier and safer to handle after dilution.
  • the diluting of concentrated solutions in batches is space-demanding as large mixing tanks are required.
  • H2O2 hydrogen peroxide
  • a bath with at least 30 litres of peroxide solution is used. After approx. one week's production the peroxide bath has been polluted by particles from the packing material and with increased pollution the concentration of peroxide diminishes and the bath becomes unusable for sterilization.
  • the peroxide solution When the peroxide solution has to be changed it may be drawn off either directly into the drain or onto the floor, which, above all owing to the vapours formed by this peroxide, is harmful to machine operators and any personnel present on the premises.
  • Peroxide vapour which is inhaled exerts a corrosive action on mucuous membranes, and direct contact with peroxide corrodes skin and clothes.
  • the peroxide solution can be pumped over to kegs or drums for subsequent destruction. Such handling too may involve hazards to those handling the solution.
  • the arrangement in Fig. 1 consists of a substantially closed main tank 1 holding at least the quantity of concentrated solution which is to be diluted. There must also be space for possible vapour formation.
  • a small partial tank 2 intended for the diluting liquid.
  • the main tank and the partial tank 2 are connected with one another on the one hand via an air gap 3 for vapours discharged in the upper part of the tanks, on the other hand via an overflow pipe 4, preferably placed vertically with its bottom end immersed in the main tank 1 below the lower boundary surface of the partial tank 2.
  • the top end of the overflow pipe 4 ist on a level with the level of the concentrated solution in the main tank 1.
  • a feed or inlet pipe 5 for diluting liquid In the upper part of the partial tank 2 opens up a feed or inlet pipe 5 for diluting liquid.
  • This feed pipe 5 is forked so that a small amount of diluting liquid is diverted from the feed flow and is supplied to the main tank 1.
  • the main tank 1 is provided with an openable drainage line 6 suitably placed at the bottom 7.
  • the bottom 7 may be made sloping with the drainage line 6 being in the upper part.
  • the outlet line 8 of the partial tank 2 is constituted of an overflow pipe whose one end opens below the liquid surface in the partial tank 2.
  • the arrangement is provided, moreover, with a ventilating pipe 9 for the discharge of vapours and for reducting the danger of excess pressure in the tanks.
  • the concentrated solution which is to be diluted is fed to the main tank 1, where it occupies almost the whole space.
  • the supply of the concentrated solution to the main tank 1 should be arranged in a safe manner so that the solution does not need to be handled manually.
  • the upper part of the arrangement might then be filled with vapours which are discharged via a ventilating pipe 9 which may be connected to the central ventilation and conducted away from the production premises.
  • the diluting liquid which e.g. may be water, is supplied to the arrangement through an inlet line 5.
  • the waste water from the water ring compressor of the machine which is used for scrubbing the air containing hydrogen peroxide circulating in the machine can serve excellently as diluting liquid.
  • the greater part of the diluting liquid supplied is fed to the partial tank 2.
  • a small amount is branched off and is fed to the main tank 1.
  • the liquid level in the main tank 1 rises and thus also the level in the overflow pipe 4 which connects the main tank 1 to the partial tank 2.
  • a small quantity of concentrated solution, corresponding to the diluting liquid fed to the main tank 1, passes via the overflow pipe 4 out into the diluting liquid of the partial tank 2.
  • the partial tank 2 is drained continuously via its outlet 8 which is constituted of an overflow pipe.
  • This overflow pipe 8 opens below the liquid surface, so that the vapours should not be able to pass this way. If the diluted solution is allowed to be drawn off directly into the drain, the outlet 8 can be connected directly to this. Otherwise an appropriate arrangement is present to take charge of the liquid after the outlet pipe 8.
  • a small portion of diluting liquid is fed continuously into the main tank 1 at the same time as the concentrated solution passes via the overflow pipe 4 out into the partial tank 2.
  • This small quantity of diluting liquid thus will gradually cause the contents of the main tank 1 too to be diluted to a harmless concentration.
  • the diluting liquid can be kept constant, for example, by giving the branch line 10 from the inlet line 5 of diluting liquid a certain dimension or, as is shown in Fig.2, by providing a vessel with constant water head and a bottom outlet opening of a defined dimension at the inlet 5 of the diluting liquid.
  • the openable draining line 6 may be opened and the main tank 1 emptied.
  • the main tank 1 now is ready to accept a new quantity of concentrated solution and the diluting process is repeated.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • External Artificial Organs (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Detergent Compositions (AREA)
EP89118969A 1988-10-31 1989-10-12 A method and an arrangement for the continuous diluting of a concentrated solution Expired - Lifetime EP0366992B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118969T ATE83945T1 (de) 1988-10-31 1989-10-12 Verfahren und vorrichtung zur kontinuierlichen verduennung einer konzentrierten loesung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8803917A SE462317B (sv) 1988-10-31 1988-10-31 Saett och anordning foer att kontinuerligt utspaeda en koncentrerad loesning
SE8803917 1988-10-31

Publications (2)

Publication Number Publication Date
EP0366992A1 EP0366992A1 (en) 1990-05-09
EP0366992B1 true EP0366992B1 (en) 1992-12-30

Family

ID=20373807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118969A Expired - Lifetime EP0366992B1 (en) 1988-10-31 1989-10-12 A method and an arrangement for the continuous diluting of a concentrated solution

Country Status (10)

Country Link
EP (1) EP0366992B1 (es)
JP (1) JP2860487B2 (es)
AT (1) ATE83945T1 (es)
AU (1) AU620652B2 (es)
CA (1) CA2000846C (es)
DE (1) DE68904165T2 (es)
ES (1) ES2037364T3 (es)
GR (1) GR3006726T3 (es)
RU (1) RU1836131C (es)
SE (1) SE462317B (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE462317B (sv) * 1988-10-31 1990-06-11 Profor Ab Saett och anordning foer att kontinuerligt utspaeda en koncentrerad loesning
AT500486B1 (de) * 2004-03-05 2006-11-15 Hagleitner Hans Georg Verfahren zur herstellung verdünnter lösungen
EP1897524B1 (de) * 2006-09-05 2012-03-21 Spagyros AG Verfahren und Vorrichtung zum Potenzieren von Flüssigkeiten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073187A1 (en) * 1980-10-31 1983-03-09 Göran BERNHARDSSON A method and a device for mixing and homogenization of a main substance with at least one additive substance, liquids in particular
SE462317B (sv) * 1988-10-31 1990-06-11 Profor Ab Saett och anordning foer att kontinuerligt utspaeda en koncentrerad loesning

Also Published As

Publication number Publication date
GR3006726T3 (es) 1993-06-30
EP0366992A1 (en) 1990-05-09
CA2000846A1 (en) 1990-04-30
AU620652B2 (en) 1992-02-20
DE68904165T2 (de) 1993-04-29
ATE83945T1 (de) 1993-01-15
AU4383789A (en) 1990-05-03
DE68904165D1 (de) 1993-02-11
SE8803917D0 (sv) 1988-10-31
CA2000846C (en) 1993-02-23
RU1836131C (ru) 1993-08-23
SE462317B (sv) 1990-06-11
ES2037364T3 (es) 1993-06-16
JP2860487B2 (ja) 1999-02-24
JPH02160027A (ja) 1990-06-20
SE8803917L (es) 1990-05-01

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