US3807948A - Dry cleaning - Google Patents

Dry cleaning Download PDF

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Publication number
US3807948A
US3807948A US00233892A US23389272A US3807948A US 3807948 A US3807948 A US 3807948A US 00233892 A US00233892 A US 00233892A US 23389272 A US23389272 A US 23389272A US 3807948 A US3807948 A US 3807948A
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United States
Prior art keywords
goods
dry cleaning
solvent
deodorizing
refrigerated
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
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US00233892A
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English (en)
Inventor
W Moore
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Neil and Spencer Ltd
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Neil and Spencer Ltd
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Publication date
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Application filed by Neil and Spencer Ltd filed Critical Neil and Spencer Ltd
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    • 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

  • TRACT A method of dry cleaning of goods in which the majority of the solvent present in the goods at the conclusion of the actual cleaning is recovered by circulating air, by means of a fan, through the goods in a dry cleaning drum and through a water-cooled condenser and a heating element, and then a small remaining amount of solvent is removed from the goods by a deodorizing operation, in which air is passed in a closed circuit through the goods in the dry cleaning drum and over a refrigerated surface on which the solvent is condensed.
  • PATENTEDAPR 30 I974 SHEET 3 [IF 3 I 1 DRY CLEANING In the process of dry cleaning of clothes or other goods using perchlorethylene as a solvent, the majority of the perchlorethylene present in the goods at the conclusion of the actual cleaning is recovered by circulating air, by means of a fan, through the goods in a dry cleaning drum and through a water-cooIed-condenser and a heating element. Following this-recovery, there is still a small amount of perchlorethylenein the goods which would give the goods an odour, and to deal with this there is a final stage known as deodorizing.
  • a modified procedure is to pass the air to the chimney through a carbon recovery plant inwhich the perchlorethylene is adsorbed. From time to time the perchlorethylene is expelled from the carbon recovery plant with the aid of steam.
  • the present invention concerns an alternative procedure for deodorizing goods as a final stage in a dry cleaning process after recovery of themaj'ority of solvent by means of a water-cooled condenser.
  • This procedure may be used not only with perchlorethylene or trichloroethylene as solvent, but also with other solvents of high boiling points, and in particular, with 1,l,l trichloroethane.
  • the majority of the solvent present in the goods at the conclusion of the actual cleaning is recovered by circulating air, by means of a fan, through the goods in a dry cleaning drum and through a watercooled condenser and a heating element, and then a small remaining amount of solvent is removed from the goods by a deodorizing operation in which air is passed in a closed circuit through the goods in the dry cleaning drum and over a refrigerated surface on which the solvent is condensed.
  • the present invention involves the use of both a water-cooled condenser and a refrigerated condenser. It is distinct from procedures, used with fluorinated hydrocarbons having a low boiling point, in which the entire recovery process is carried out by a refrigerated condenser. Such a use of a refrigerated condenser for the recovery process would be unnecessarily expensive in dry cleaning using solvents with higher boiling points.
  • FIG. 1 is a circuit diagram
  • FIG. 1A shows a slight modification of FIG. 1
  • FIG. 2 is a second circuit diagram
  • FIG. 3 is a diagramof a particular form of refrigerated surface.
  • the apparatus shown in FIG. 1 incluees a customary dry cleaning drum 2.
  • the circuit for recovery of the majority of solvent present in the clothes at the conclusion of cleaning, after liquid has been drained into a tank 4, is constituted by ducting running from an outlet 6 from the drum to an inlet 8, and containing a dust filter 10, a fan 12, a condenser 14, and a heater 16.
  • the condenser 14 is supplied with cooling water by means not shown.
  • dampers A and B which can be opened alternatively, to direct flow through the heater 16 or through the chamber 20.
  • chamber is used for convenience, but in fact the enclosure for the coil 22 may simply be constituted by a portion of ducting of fairly large cross section.
  • Water evaporated from the goods during recovery is mostly condensed on the water-cooled condenser 14. Residual water vapour may form frost on the coil 22, but this will rapidly disperse at the conclusion of the deodorizing stage. A period of the order of 20 minutes elapses between the deodorizing stage of one cycle of operation and the same stage of the next cycle. During this interval the refrigeration unit 24 can be turned off. If necessary, defrosting of the coil can be augmented by passing warm air through the chamber 20 containing the coil.
  • the solvent condensed on the coil is collected and passed, by means not shown, through a water separator, to the liquid solvent circuit of the apparatus.
  • FIG. 1A shows a modification of FIG. 1 in which the arrangement is more compact.
  • the chamber 20 is immediately alongside the heater l6, and the second fan 18 is omitted.
  • there is a single damper C which can be swung through FIG. 2 shows an arrangement which is simpler in construction, but otherwise less satisfactory.
  • the refrigerated coil 22a lies in a single ducting circuit, between the water-cooled condenser 14a and the heater 16a.
  • a disadvantage of this arrangement is that, at the start of a recovery operation, the coil'22a is cold, and acts as a heat sink, even though the refrigeration unit 24a has been turned off. Hence the air flow past the coil is chilled, and part of the action of the heater 16a is spent in counteracting this chilling.
  • FIG. 3 shows a modification to FIG. 1 which enables a smaller refrigeration unit to operate continuously.
  • a refrigerated coil directly exposed to the air containing solvent vapour is replaced by a coil 22b, which lies within a vessel 26 which is filled with a liquid of high specific heat (e.g. glycol), and which has external fins 28.
  • the vessel filled with glycol acts as a body of substantial thermal capacity, from which heat is removed continuously by the action of the refrigeration unit 24b, and which in turn can remove heat relatively rapidly from solvent in the air during the deodorizing operation only.
  • a device, not shown, can be provided to detect any occasional accumulation of ice on the fins, and to thereupon initiate a defrosting action.
  • the method according to the present invention is particularly suitable and advantageous for use in processes in which the solvent is 1,1,1 trichloroethane.
  • the solvent is 1,1,1 trichloroethane.
  • One significant reason is that, at normal atmosphere temperature, trichloroethane has a high vapour pressure and is therefore especially unsuitable for handling by a carbon recovery plant.
  • compositions have become available on the market which include trichloroethane as a principal ingredient, together with a satisfactory stabiliser.
  • trichlorethane can now be used as a dry cleaning solvent. It is available in the United Kingdom from Imperial Chemical Industries, Ltd. under the Trade Mark GENKLENE and on the continent of Europe from Solvay. The boiling point of the composition GENKLENE is given as falling in the range to C.
  • a method of dry cleaning of goods in which the majority of the solvent present in the goods at the conclusion of the actual cleaning is recovered by circulating air, by means of a fan, through the goods in a dry cleaning drum and through a water-cooled condenser and a heating element, and then a small remaining amount of solvent is removed from the goods by a deodorizing operation, in' which air is passed in a closed circuit through the goods in the dry cleaning drum and over a refrigerated surface on which the solvent is condensed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detergent Compositions (AREA)
  • Drying Of Solid Materials (AREA)
  • Cleaning By Liquid Or Steam (AREA)
US00233892A 1971-03-25 1972-03-13 Dry cleaning Expired - Lifetime US3807948A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB781871A GB1379742A (en) 1971-03-25 1971-03-25 Dry cleaning
GB1331571 1971-05-05

Publications (1)

Publication Number Publication Date
US3807948A true US3807948A (en) 1974-04-30

Family

ID=26241689

Family Applications (1)

Application Number Title Priority Date Filing Date
US00233892A Expired - Lifetime US3807948A (en) 1971-03-25 1972-03-13 Dry cleaning

Country Status (5)

Country Link
US (1) US3807948A (enExample)
DE (1) DE2214570A1 (enExample)
FR (1) FR2130523B1 (enExample)
GB (1) GB1379742A (enExample)
IT (1) IT952373B (enExample)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154002A (en) * 1975-09-26 1979-05-15 Neil And Spencer Limited Dry cleaning
US4262430A (en) * 1979-11-15 1981-04-21 Hoyt Manufacturing Corporation Combination solvent reclaimer and dryer
EP0031971A1 (en) * 1980-01-03 1981-07-15 VE.DA. S.r.l. Close-circuit condensation depurator of gaseous flows containing solvents
US4494317A (en) * 1983-01-24 1985-01-22 Firbimatic S.R.L. Accessory device for removing solvent vapor in machines for dry cleaning garments and the like
US4583985A (en) * 1983-07-01 1986-04-22 Hoechst Aktiengesellschaft Process for the recovery of solvents in the treatment of textiles
DE3706073A1 (de) * 1986-02-27 1987-09-10 Tsnii Bytovogo Obsluzivanija C Verfahren zur rueckgewinnung organischer loesungsmittel in anlagen fuer chemische reinigung
US4869872A (en) * 1986-09-26 1989-09-26 Hans Baltes Process for drying and sterilizing goods in a closed circulating system
US5213594A (en) * 1991-08-05 1993-05-25 Vic Manufacturing Controlling solvent vapors in dry cleaning apparatus
US5802884A (en) * 1996-11-01 1998-09-08 Cavalli; Giuseppe Machine for washing and degreasing with solvents or for drying textile products or the like
WO2016168401A1 (en) * 2015-04-14 2016-10-20 Inter-Med, Inc. Automated cordless syringe

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460363A1 (fr) * 1979-07-03 1981-01-23 Frimair Sa Procede pour extraire un solvant impregnant des tissus et dispositif pour sa mise en oeuvre
FR2467009A1 (fr) * 1979-10-10 1981-04-17 Amaten Procede et machine de traitement en milieu solvant
FR2494316A1 (fr) * 1980-11-18 1982-05-21 Mordelet Francis Procede de desodorisation pour machine de nettoyage a sec
GB201006076D0 (en) 2010-04-12 2010-05-26 Xeros Ltd Novel cleaning apparatus and method
GB201015277D0 (en) 2010-09-14 2010-10-27 Xeros Ltd Novel cleaning method
GB201100627D0 (en) 2011-01-14 2011-03-02 Xeros Ltd Improved cleaning method
GB201100918D0 (en) 2011-01-19 2011-03-02 Xeros Ltd Improved drying method
GB201212098D0 (en) 2012-07-06 2012-08-22 Xeros Ltd New cleaning material
GB201216101D0 (en) * 2012-09-10 2012-10-24 Xeros Ltd Improved cleaning apparatus and method
GB201319782D0 (en) 2013-11-08 2013-12-25 Xeros Ltd Cleaning method and apparatus
GB201320784D0 (en) 2013-11-25 2014-01-08 Xeros Ltd Improved cleaning Apparatus and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426446A (en) * 1965-08-23 1969-02-11 Etma Mas Fab Gmbh Apparatus for cooling and condensing gases
US3664806A (en) * 1963-09-13 1972-05-23 Res Dev Co Dry cleaning of textile fibers and other garment materials with chlorofluoro hydrocarbons having relatively high freezing points
US3738127A (en) * 1971-01-29 1973-06-12 Systemation Inc Dry cleaning recovery unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664806A (en) * 1963-09-13 1972-05-23 Res Dev Co Dry cleaning of textile fibers and other garment materials with chlorofluoro hydrocarbons having relatively high freezing points
US3426446A (en) * 1965-08-23 1969-02-11 Etma Mas Fab Gmbh Apparatus for cooling and condensing gases
US3738127A (en) * 1971-01-29 1973-06-12 Systemation Inc Dry cleaning recovery unit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154002A (en) * 1975-09-26 1979-05-15 Neil And Spencer Limited Dry cleaning
US4262430A (en) * 1979-11-15 1981-04-21 Hoyt Manufacturing Corporation Combination solvent reclaimer and dryer
EP0031971A1 (en) * 1980-01-03 1981-07-15 VE.DA. S.r.l. Close-circuit condensation depurator of gaseous flows containing solvents
US4494317A (en) * 1983-01-24 1985-01-22 Firbimatic S.R.L. Accessory device for removing solvent vapor in machines for dry cleaning garments and the like
US4583985A (en) * 1983-07-01 1986-04-22 Hoechst Aktiengesellschaft Process for the recovery of solvents in the treatment of textiles
DE3706073A1 (de) * 1986-02-27 1987-09-10 Tsnii Bytovogo Obsluzivanija C Verfahren zur rueckgewinnung organischer loesungsmittel in anlagen fuer chemische reinigung
US4869872A (en) * 1986-09-26 1989-09-26 Hans Baltes Process for drying and sterilizing goods in a closed circulating system
US5213594A (en) * 1991-08-05 1993-05-25 Vic Manufacturing Controlling solvent vapors in dry cleaning apparatus
US5802884A (en) * 1996-11-01 1998-09-08 Cavalli; Giuseppe Machine for washing and degreasing with solvents or for drying textile products or the like
WO2016168401A1 (en) * 2015-04-14 2016-10-20 Inter-Med, Inc. Automated cordless syringe

Also Published As

Publication number Publication date
IT952373B (it) 1973-07-20
GB1379742A (en) 1975-01-08
FR2130523A1 (enExample) 1972-11-03
DE2214570A1 (de) 1972-10-05
FR2130523B1 (enExample) 1975-10-24

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