US2946476A - Sealing device - Google Patents

Sealing device Download PDF

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Publication number
US2946476A
US2946476A US604873A US60487356A US2946476A US 2946476 A US2946476 A US 2946476A US 604873 A US604873 A US 604873A US 60487356 A US60487356 A US 60487356A US 2946476 A US2946476 A US 2946476A
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US
United States
Prior art keywords
solvent
water
chamber
seal
cloth
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
US604873A
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English (en)
Inventor
Ross Herbert John
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Application granted granted Critical
Publication of US2946476A publication Critical patent/US2946476A/en
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B9/00—Solvent-treatment of textile materials
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/04—Apparatus
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17B—GAS-HOLDERS OF VARIABLE CAPACITY
    • F17B1/00—Gas-holders of variable capacity

Definitions

  • This invention relates to a sealing device for vessels or chambers through which materials are continuously passed in sheet form and in which they are subjected to treatments that involve or give rise to evaporation of volatile, substantially water-immiscible, organic solvents.
  • processes are, for example, solvent degreasing of strip metal and of textile materials.
  • a particular instance is the process and apparatus for dewaxing and degreasing of textile materials described in copending British applications Nos. 1,600/53 (Serial No. 747,481), 22,852/53 (Serial No. 749,705) and 13,149/ 55 which process involves treatment of the textiles with a volatile substantially water-immiscible organic solvent, for example, trichloroethylene or perchloroiethylene, which is subsequently evaporated and recovered.
  • a volatile substantially water-immiscible organic solvent for example, trichloroethylene or perchloroiethylene
  • Each of these treatment vessels thus comprises one or more baths containing the appropriate liquid, a ⁇ series of rollers, guides and tensioning devices to cause the cloth to dip into the bath or baths and an external envelope, the primary function of which is to contain the vapours given off from the treatment liquids and enable them to be recovered.
  • the envelope carries seals on the orifices by which the cloth enters and leaves to assist in containing these vapours, such as shown and described in my co-pending application Serial No.'489,l89, iled February 18, 1955, which was issued April 22, 1958, as U.S. Patent 2,831,332.
  • the containing envelope is made to serve as a structural support for the guides, rollers and tensioning devices that determine the path of the cloth but we have rfound that in some circumstances this may cause considerable inconvenience.
  • the conveying structure for the cloth is supported externally and not carried on the envelope, ⁇ the latter, having no external load to support may be constructed of comparatively thin sheet stamless steel.
  • the structural members that support the cloth-conveying mechanism also support the cover of the chamber which, in this case, is preferably entirely separate from the base and side walls. Bolting or otherwise clamping the cover to the side walls is in these circumstances attended by various inconveniences. For instance, unless the positioning is very accurate distortion or undue straining of portions of the envelope can very readily occur and in any case dismantling for adjustment or maintenance is laborious and time-consuming. In practice it is preferable to make the walls and cover entirely independent andk to provide a seal of some kind to close the gap. it is the purpose of this invention to provide a liquid seal adapted to serve this and analogous purposes.
  • Such a seal is provided by arranging that a septum constituted by the down-turned edge of the cover of the treatment chamber, or by a skirt or collar depending from the cover, dips into a body of liquid contained in a box-like or channel-shaped vessel attached to and conveniently made integral with the side-walls of the chamber, preferably near the upper extremities thereof, this liquid consisting of two phases, namely Water and the solvent the vapour of which is ⁇ to be contained, these phases being maintained in hydrostatic balance by the provision of suitably disposed overows.
  • Figure 1 of the accompanying drawing shows a vertical section through a part of the annular seal wherein 1 represents a portion of one of the structural members that support the cloth-conveying mechanism, which member also supports the cover 2 of the chamber, the down-turned edge or rim of the cover forming the septum 3.
  • the box-like or channel-shaped vessel dened by the walls 4 and vthe base 5 is carried on the upper extremity of the side-wall 6 of the treatment charnber, a small gap 7 being left between the side-wall 6 and the cover 2 of the chamber.
  • the overows for lwater and for solvent are shown respectively as 8 and 9.
  • the overdiow 8 - is at a higher level than overiiow 9 and in the case where the solvent is less dense than water' (as, for ex ⁇ ample, with White spirit) overow 8 is'lower than overiiow 9, the system is self-adjusting. if, however, the mean working pressure in the treatment Achamber is Substantiallygreater than atmospheric,1then overow Y up ,where water from the feed passesV away by overflow Spend' solvent, or in many cases amixture of solvent with a little water,passes away'by overflow 9.
  • the mean working pressure in the treatment Achamber is Substantiallygreater than atmospheric,1then overow Y up ,where water from the feed passesV away by overflow Spend' solvent, or in many cases amixture of solvent with a little water,passes away'by overflow 9.
  • the above embodiment of the invention may be used on either the chamber where the clothis treated with solvent, or the chamber where entrained solvent is removed by vaporising the solvent from the cloth.
  • the mixture of solvent vapour and water vapour condensing in the seal has a much higher water content than the trace which is present in solvent vapour coming from a dewaxing or degreasing chamber.
  • the solvent is trichloroethylene
  • the ratio of water to solvent is frequently vas much as 1 part by weight of water to each 14 parts of trichloroethylene and in some circumstances has been as high as 1 part of water to 3 parts of trichloroethylene.
  • a further embodiment of the invention may be preferred.
  • the box-like or channel-shaped vessel defined by the walls 4 and the base 5 is carried on the upper extremity of the side wall 6 of the treatment chamber, a small gap 7 being left between the side-wall 6 and the cover 2 of the chamber.
  • the overflows for water and for solvent are shown respectively as 8 and 9, both being placed, in this form of the invention, on theY same side of the septum 3.
  • This form oi the invention is only applicable to the case where the solvent is denser than water, hence the overliow ⁇ S is placed at a higher level than the overilow 9.
  • the relative positions of overflows 8 and 9 determine the position of the water-solvent interface since the watercolumn beyond the septum must balance the column of solvent between vthe interface and overllow 9. It the system is to work under a substantial positive mean worm pressure then the water level on the inner side of the.- septum will tall so that the sum of the height of this column and the positive pressure in the chamber balances the Water column on the outer side of the septum. Therefore the seal must be so constructed that the difference in level between the water overflow 8 and the lower extremity of the septum is somewhat greater than the highest pressure that is likely to be builtrup in the treatment chamber.
  • Pipe 10 is a vent pipe to prevent siphoning of liquid ifrom the seal.
  • the vapours entering the seal may in some cases be at a suliciently high temperature to cause boiling at the solvent-water interface unless sulicient cooling is provided. This is suitably done by adjustment of the water fed to the outer portion of the channel.
  • Figures 1 and 2 show the seal tted to the exterior of the treatment chamber. lf desired, of course, the body of the seal can be housed within the chamber.
  • means including a cover and independent side wall means defining a chamber within which the materials are subjected to treatments that give rise to evaporation of the solvents, and liquid seal means between said cover and said independent side Wall means for preventing escape of the solvent vapors, said seal means comprising an annular channel-shaped vessel carried by said side wall means and having liquid therein, and an annular skirt on said cover extending downwardly into said vessel, said liquid including water and a water-immiscible solvent, iirst overflow means directly communicating with said water, and second overllow means directly communicating with said solvent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Fiber Materials (AREA)
US604873A 1955-08-29 1956-08-20 Sealing device Expired - Lifetime US2946476A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB349239X 1955-08-29

Publications (1)

Publication Number Publication Date
US2946476A true US2946476A (en) 1960-07-26

Family

ID=10371609

Family Applications (1)

Application Number Title Priority Date Filing Date
US604873A Expired - Lifetime US2946476A (en) 1955-08-29 1956-08-20 Sealing device

Country Status (5)

Country Link
US (1) US2946476A (de)
BE (1) BE550679A (de)
CH (1) CH349239A (de)
FR (1) FR1161113A (de)
GB (1) GB841868A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199853A (en) * 1962-04-25 1965-08-10 Porter Co Inc H K Bell-type annealing furnace and method of sealing same
US4116357A (en) * 1977-08-22 1978-09-26 Owens-Corning Fiberglas Corporation Tank with water-sealable vent
US4199008A (en) * 1978-06-12 1980-04-22 Koppers Company, Inc. Wet sealed standpipe cap

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO176827C (no) * 1993-02-08 1995-06-07 Hans Hermansson Anordning for bortledning av olje og vann fra en overflate, særlig fra dekket på et tankfartöy

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1209465A (en) * 1913-01-28 1916-12-19 I P Bemberg Aktien Ges Apparatus for leaching and rinsing mercerized fabrics and recovering the lye.
US1874742A (en) * 1929-09-19 1932-08-30 Pure Oil Co Pressure relief mechanism
US2029985A (en) * 1932-05-31 1936-02-04 Buffalo Electro Chem Co Method of bleaching
US2170579A (en) * 1937-11-30 1939-08-22 Paul A Sperry Cloth finishing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1209465A (en) * 1913-01-28 1916-12-19 I P Bemberg Aktien Ges Apparatus for leaching and rinsing mercerized fabrics and recovering the lye.
US1874742A (en) * 1929-09-19 1932-08-30 Pure Oil Co Pressure relief mechanism
US2029985A (en) * 1932-05-31 1936-02-04 Buffalo Electro Chem Co Method of bleaching
US2170579A (en) * 1937-11-30 1939-08-22 Paul A Sperry Cloth finishing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199853A (en) * 1962-04-25 1965-08-10 Porter Co Inc H K Bell-type annealing furnace and method of sealing same
US4116357A (en) * 1977-08-22 1978-09-26 Owens-Corning Fiberglas Corporation Tank with water-sealable vent
US4199008A (en) * 1978-06-12 1980-04-22 Koppers Company, Inc. Wet sealed standpipe cap

Also Published As

Publication number Publication date
FR1161113A (fr) 1958-08-21
CH349239A (de) 1960-10-15
GB841868A (en) 1960-07-20
BE550679A (de)

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