EP0685588A1 - Activated carbon solvent treatment unit for dry-cleaning machines with improved circuit for connection to the machine - Google Patents

Activated carbon solvent treatment unit for dry-cleaning machines with improved circuit for connection to the machine Download PDF

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Publication number
EP0685588A1
EP0685588A1 EP95107796A EP95107796A EP0685588A1 EP 0685588 A1 EP0685588 A1 EP 0685588A1 EP 95107796 A EP95107796 A EP 95107796A EP 95107796 A EP95107796 A EP 95107796A EP 0685588 A1 EP0685588 A1 EP 0685588A1
Authority
EP
European Patent Office
Prior art keywords
air
activated
filter
drum
duct
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.)
Withdrawn
Application number
EP95107796A
Other languages
German (de)
English (en)
French (fr)
Inventor
Gualtiero Ghelardini
Tommaso Arbizzani
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.)
SO DI BO SpA
Original Assignee
SO DI BO 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 SO DI BO SpA filed Critical SO DI BO SpA
Publication of EP0685588A1 publication Critical patent/EP0685588A1/en
Withdrawn legal-status Critical Current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 an improved circuit for connection to the machine.
  • Conventional dry-cleaning machines include the so-called deodorization cycle in order to eliminate residual traces of solvent from the washed garments: in practice, the washing drum is flushed by a stream of hot air that removes even small traces of solvent and moisture from the garments; this stream is conveyed onto an activated-carbon filter (adapted to retain the solvent present in the air) and is then returned to the drum.
  • an activated-carbon filter adapted to retain the solvent present in the air
  • the activated-carbon filter When the carbon is saturated with solvent, the activated-carbon filter is flushed in countercurrent with hot air for a so-called regeneration cycle: in practice, after flowing through the filter, the air is returned to the drum and is passed through the condenser of the dry-cleaning machine to remove the solvent and the moisture contained therein.
  • the circuit In order to make the air stream circulate through the filter, the circuit includes a blower usually installed upstream of the filter (with reference to the adsorption cycle) and a large number of valve systems and pipes are provided to produce flow in the normal direction for adsorption and countercurrent flow for regeneration: an exchanger is also provided for cooling the air stream before adsorption, as required because of the heating that the air undergoes when passing through the blower.
  • activated-carbon filters are required to operate ever more effectively: accordingly, it is convenient to prevent the temperature of the air sent to the filter from being too high during the solvent extraction cycle (adsorption), whereas during regeneration of the activated-carbon filter the air preferably has a high temperature.
  • a principal aim of the present invention is to obviate the above mentioned drawbacks of known devices, that is to say, to provide an activated-carbon solvent treatment unit for dry-cleaning machines with an improved circuit for connection to the machine, having a series of ducts and valve systems for connection to the dry-cleaning machine that is highly simplified, does not entail the presence of an exchanger for cooling the air stream during adsorption, and allows to operate in the best temperature conditions during adsorption and during regeneration.
  • an object of the present invention is to achieve the above aim with a simple structure that is relatively easy to provide in practice, is safe in use, effective in operation, and has a relatively low cost.
  • the present activated-carbon solvent treatment unit for dry-cleaning machines with improved circuit for connection to the machine characterized in that it comprises: a cylindrical vessel that has a vertical axis, lies vertically, and contains the activated carbon; a first duct for connecting the top of the filter to the pipe for introducing the air in the drum of the drying circuit; a second duct for connecting the base of the filter to the pipe for removing the air from the drum of the drying circuit; a cutoff valve system arranged in said second duct and open during adsorption and regeneration to connect the drum to the activated-carbon filter; a blower of the type that performs a pumping action in both of its directions of rotation, is mounted on said first duct and actuatable in opposite directions, so that during adsorption it draws the air from the activated-carbon filter to introduce it in the drum, whereas during regeneration it draws air from the drum to introduce it in the filter in countercurrent.
  • the reference numeral 1 generally designates an activated-carbon solvent treatment unit for dry-cleaning machines with an improved circuit for connection to the machine, according to the invention.
  • the treatment unit 1 comprises a vessel 2 having an advantageously cylindrical shape and a vertical axis, arranged vertically, and filled with activated carbon 3.
  • the treatment unit 1 is connected to a dry-cleaning machine, the components whereof that concern the present invention have been shown in the figures: in particular, B designates a washing drum, C1 designates the feed pipe, and C2 designates the pipe for removing air from the drum; the pipe C2 is provided, at the top, with a filter F and is connected to a condenser CD adapted to condensate and extract the solvent provided therein; said solvent is removed through a tube T, and the air stream is circulated by the centrifugal fan V and fed into the pipe C1, at the top whereof a heating battery R is provided, through an upper opening A that is cutoff by a shutter D.
  • the reference numeral 4 designates a first duct for connecting the top of the filter to the pipe C1
  • the reference numeral 5 designates a second duct for connecting the base of the filter to the pipe C2.
  • a cutoff valve system 6 (electric valve) is arranged in the second duct 5 and is open during adsorption and regeneration to connect the drum to the activated-carbon filter.
  • the reference numeral 7 designates a blower of the type that produces a pumping action in both of its directions of rotation, is mounted on the first duct 4 and actuatable in opposite directions so that during the adsorption step it draws air from the activated-carbon filter to feed it into the drum (in the direction shown by the arrows of figure 1), whereas during the regeneration step it draws air from the drum to feed it into the filter in countercurrent (in the direction shown by the arrows of figure 2); during the adsorption step, the shutter D is closed and the fan V is idle, whereas during the regeneration step the shutter D is open and the fan V runs so as to make the air stream pass over the condenser CD and extract the solvent removed from the activated carbon: in other words, during regeneration, part of the air that flows between the drum and the condenser is diverted into the vessel 2 to extract the solvent from the activated carbon 3.
  • the cylindrical vessel contains heating elements 8 activated during regeneration and advantageously constituted by a coil connected to a source of superheated steam.
  • the arrangement of the pump in the duct 4 prevents the air entering the filter from being heated by the pump during the adsorption step, whereas during the regeneration step the pump heats the air before it enters the filter: in other words, during the regeneration step the heating of the air caused by the pump is made to occur in an optimum region, so as to have hot air at the very point of the filter where solvent concentration is lowest, therefore requiring high air temperature, and where instead the heating element 8 has not yet effectively heated all the mass of activated carbon.
  • the end of a tube 9 can be connected to the duct 4 between the pump 7 and the pipe C1; said tube is connected to the second duct 5 at the other end and is affected by a valve system 10 adapted to be opened during regeneration to allow partial recirculation of the air on the activated-carbon filter to achieve a higher air temperature in the first region where it is introduced in the filter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treating Waste Gases (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Separation Of Gases By Adsorption (AREA)
EP95107796A 1994-06-02 1995-05-22 Activated carbon solvent treatment unit for dry-cleaning machines with improved circuit for connection to the machine Withdrawn EP0685588A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT94BO000260A ITBO940260A1 (it) 1994-06-02 1994-06-02 Depuratore per solventi a carboni attivi per macchine lavasecco con circuito di allacciamento alla macchina perfezionato.
ITBO940260 1994-06-02

Publications (1)

Publication Number Publication Date
EP0685588A1 true EP0685588A1 (en) 1995-12-06

Family

ID=11339866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107796A Withdrawn EP0685588A1 (en) 1994-06-02 1995-05-22 Activated carbon solvent treatment unit for dry-cleaning machines with improved circuit for connection to the machine

Country Status (2)

Country Link
EP (1) EP0685588A1 (it)
IT (1) ITBO940260A1 (it)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706073A1 (de) * 1986-02-27 1987-09-10 Tsnii Bytovogo Obsluzivanija C Verfahren zur rueckgewinnung organischer loesungsmittel in anlagen fuer chemische reinigung
EP0302280A2 (de) * 1987-08-07 1989-02-08 BÖWE-PASSAT Reinigungs- und Wäschereitechnik GmbH Verfahren und Vorrichtung zum Rückgewinnen von Lösemittelgasen aus einem Luftstrom
DE8900304U1 (de) * 1988-12-16 1989-03-23 Böwe-Passat Reinigungs- und Wäschereitechnik GmbH, 86161 Augsburg Maschine zur Behandlung von Ware mit einem organischen Lösemittel
JPH03221099A (ja) * 1990-01-29 1991-09-30 Mitsubishi Heavy Ind Ltd ドライクリーニング装置の溶剤回収装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706073A1 (de) * 1986-02-27 1987-09-10 Tsnii Bytovogo Obsluzivanija C Verfahren zur rueckgewinnung organischer loesungsmittel in anlagen fuer chemische reinigung
EP0302280A2 (de) * 1987-08-07 1989-02-08 BÖWE-PASSAT Reinigungs- und Wäschereitechnik GmbH Verfahren und Vorrichtung zum Rückgewinnen von Lösemittelgasen aus einem Luftstrom
DE8900304U1 (de) * 1988-12-16 1989-03-23 Böwe-Passat Reinigungs- und Wäschereitechnik GmbH, 86161 Augsburg Maschine zur Behandlung von Ware mit einem organischen Lösemittel
JPH03221099A (ja) * 1990-01-29 1991-09-30 Mitsubishi Heavy Ind Ltd ドライクリーニング装置の溶剤回収装置

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
"Multimatic Reiniguns-Systeme seit langem auf "Nummer sicher"", MULTI VISION, no. 7, July 1990 (1990-07-01), MELLE, pages 4 - 5
"Multimatic startet mit Innovationen und Ideen in die 90er Jahre", MULTI VISION, no. 5, January 1990 (1990-01-01), MELLE, pages 8 - 9
MULTI VISION, no. 8, November 1990 (1990-11-01), pages 10
MULTI VISION, no. 9, February 1991 (1991-02-01), pages 6 - 9
MULTISOLVER - TECHNISCHE INFORMATION SEPTEMBER 1991 'Luftaustauschbeblaese'
PATENT ABSTRACTS OF JAPAN vol. 15, no. 504 (C - 0896) 19 December 1991 (1991-12-19) *

Also Published As

Publication number Publication date
ITBO940260A1 (it) 1995-12-02
ITBO940260A0 (it) 1994-06-02

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