EP0620309B1 - Activated-carbon solvent treatment unit for dry-cleaning machines with modified regeneration unit - Google Patents

Activated-carbon solvent treatment unit for dry-cleaning machines with modified regeneration unit Download PDF

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Publication number
EP0620309B1
EP0620309B1 EP94104180A EP94104180A EP0620309B1 EP 0620309 B1 EP0620309 B1 EP 0620309B1 EP 94104180 A EP94104180 A EP 94104180A EP 94104180 A EP94104180 A EP 94104180A EP 0620309 B1 EP0620309 B1 EP 0620309B1
Authority
EP
European Patent Office
Prior art keywords
activated
carbon
treatment unit
dry
container
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
EP94104180A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0620309A1 (en
Inventor
Tommaso Arbizzani
Gualtiero Ghelardini
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.)
Sodibo SpA
Original Assignee
Sodibo SpA
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 Sodibo SpA filed Critical Sodibo SpA
Publication of EP0620309A1 publication Critical patent/EP0620309A1/en
Application granted granted Critical
Publication of EP0620309B1 publication Critical patent/EP0620309B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/08—Associated apparatus for handling and recovering the solvents
    • D06F43/086—Recovering the solvent from the drying air current

Definitions

  • the present invention relates to an activated-carbon solvent treatment unit for dry-cleaning machines with improved regeneration unit.
  • Dry-cleaning machines which include the so-called deodorization cycle in order to eliminate residual solvent traces from the cleaned garments: in practice, the washing drum is flushed by a stream of warm air that is able to remove even small traces of solvent and moisture from the garments; this stream is discharged outside through an activated-carbon filter which is suitable to recover part of the solvent present in the expelled air.
  • the activated-carbon filters are flushed in countercurrent with superheated steam for a so-called regeneration cycle: after flowing through the filter, the contact water is discharged into the sewage system.
  • a regeneration unit for activated-carbon used as filtering means in a dry-cleaning apparatus is known from US-A-4 513 510.
  • the technical aim of the present invention is to obviate the above described drawbacks of conventional devices, i.e. to provide an activated-carbon solvent treatment unit for dry-cleaning machines with an improved regeneration unit that does not entail the discharge of contact water containing solvent traces into the sewage system and produces very high solvent absorption.
  • an object of the present invention is to achieve the above aim and objects with a structure which is simple, relatively easy to produce in practice, safe in use and effective in operation, and has a relatively low cost.
  • the present activated-carbon solvent treatment unit for dry-cleaning machines with improved regeneration unit characterized in that it comprises a cylindrical container with a vertical axis that extends vertically and has a convex hood and base, said container being internally provided with a deflector that forms an activated-carbon containment compartment in an upward region and, in a downward region, a water containment compartment which contains heating elements that are suitable to generate steam for flushing the carbon, the upward region and the downward region of the container lower compartment being connected by a flushing water return duct that includes a condensation unit and a water-solvent separator.
  • figure 1 is a schematic side view of an activated-carbon solvent treatment unit for dry-cleaning machines with improved regeneration unit according to the invention.
  • the reference numeral 1 generally designates an activated-carbon solvent treatment unit for dry-cleaning machines with increased absorption according to the invention.
  • the treatment unit 1 comprises a cylindrical container 2 with a vertical axis that extends vertically and preferably has a height that is twice its base diameter.
  • the container 2 has an access door 3 at its base.
  • the lower end of the container 2 has an edge 2a that is folded outward for fixing, by means of bolts, the outwardly folded edge 4 of a tubular body 5 that extends the container and to which a convex base 6 is welded in a downward region: a convex hood 7 is welded to the container 2 in an upward region.
  • the hood 7 is centrally connected to a tube 8 for the intake of the gaseous air-solvent mixture that arrives from a drum, whereas the tubular body 5 is connected to a tube 9 that returns the treated air to the drum (white arrows).
  • a filtering deflector 10 is mounted directly above the tube 9 in the body 5; an absorption chamber 11 is thus formed above the deflector and is filled with activated-carbon granules with appropriate size characteristics.
  • a compartment 12 for containing the water for flushing the activated carbon is delimited below the deflector 10.
  • Heating elements are present in the compartment 12: in the particular case, these elements are constituted by an immersed heat-exchange coil 13 which is supplied in a closed circuit by a source of superheated steam (black arrows).
  • the hood 7 and the compartment 12 are mutually connected by a duct 14 for the return of the water from the flushing of the activated carbon; a condenser 15 and a separator 16 for separating the water from the solvent are installed in the duct 14; the solvent separated at 16 is drawn through a secondary pipe 17.
  • the activated carbon is flushed in a closed circuit with locally-generated steam which, after flowing through the carbon, is condensed and reused after separating and removing the extracted solvent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
EP94104180A 1993-04-14 1994-03-17 Activated-carbon solvent treatment unit for dry-cleaning machines with modified regeneration unit Expired - Lifetime EP0620309B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO930148 1993-04-14
IT93BO000148A IT1264118B1 (it) 1993-04-14 1993-04-14 Depuratore per solventi a carboni attivi per macchine lavasecco con gruppo di rigenerazione modificato.

Publications (2)

Publication Number Publication Date
EP0620309A1 EP0620309A1 (en) 1994-10-19
EP0620309B1 true EP0620309B1 (en) 1997-10-22

Family

ID=11338904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104180A Expired - Lifetime EP0620309B1 (en) 1993-04-14 1994-03-17 Activated-carbon solvent treatment unit for dry-cleaning machines with modified regeneration unit

Country Status (3)

Country Link
EP (1) EP0620309B1 (it)
DE (1) DE69406337T2 (it)
IT (1) IT1264118B1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5752783A (en) * 1996-02-20 1998-05-19 Blaw-Knox Construction Equipment Corporation Paver with radar screed control
US7356865B2 (en) * 2003-07-29 2008-04-15 General Electric Company Apparatus and method for removing contaminants from dry cleaning solvent

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1209244A (fr) * 1958-07-10 1960-02-29 Pica Soc Nouv Perfectionnements apportés aux procédés et dispositifs de récupération de solvants volatils, et aux opérations et machines de dégraissage ou de nettoyage dit
US3095284A (en) * 1960-04-08 1963-06-25 Res Dev Co Low temperature process of dry cleaning textiles
US4443344A (en) * 1981-06-24 1984-04-17 Lewis John O Method for recovering solvent
US4513590A (en) * 1983-03-08 1985-04-30 Dual Filtrex, Inc. Combination filter apparatus for use with a dry cleaning machine

Also Published As

Publication number Publication date
DE69406337T2 (de) 1998-03-19
ITBO930148A0 (it) 1993-04-14
IT1264118B1 (it) 1996-09-10
DE69406337D1 (de) 1997-11-27
ITBO930148A1 (it) 1994-10-14
EP0620309A1 (en) 1994-10-19

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