US3842856A - Combined gas trap and liquid separator - Google Patents

Combined gas trap and liquid separator Download PDF

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Publication number
US3842856A
US3842856A US00322491A US32249173A US3842856A US 3842856 A US3842856 A US 3842856A US 00322491 A US00322491 A US 00322491A US 32249173 A US32249173 A US 32249173A US 3842856 A US3842856 A US 3842856A
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US
United States
Prior art keywords
bucket
trap
conduit
steam
separator
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
US00322491A
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English (en)
Inventor
A Miselem
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3842856A publication Critical patent/US3842856A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F16T1/20—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats
    • F16T1/30—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats of inverted-open-bucket type; of bell type
    • F16T1/305—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats of inverted-open-bucket type; of bell type using levers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3003—Fluid separating traps or vents
    • Y10T137/3021—Discriminating outlet for liquid
    • Y10T137/3028—With non-discriminating gas vent or liquid discharge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3003—Fluid separating traps or vents
    • Y10T137/3021—Discriminating outlet for liquid
    • Y10T137/304—With fluid responsive valve
    • Y10T137/3046—Gas collecting float [e.g., inverted bucket]

Definitions

  • the invention contemplates an improved steam trap of the inverted-bucket type, providing the function of separating liquid from gas in a given inlet-fluid flow, without substantial impairment of the gas tlow.
  • condensate is separated and passed off as necessary, allowing a continuous flow of steam via a steam outlet which is independent of a condensate outlet.
  • the separation of steam from condensate is achieved by using an inlet-fluid conduit which discharges into and within the bucket at an elevation less than that of the upper end of a gas-outlet conduit which is also within the bucket; by selecting the size of the gas-outlet conduit so as to provide a slight constriction to the gas (steam) flow, the bucket will be buoyedV tQ deesse tegtisns assays: liquidorvQl: umes within the trap. Discharge of separated condensate liquid is via a valve operated by the extent of buoyed elevation of the bucket, and discharge of separated steam is independent of whether or not condensate is being discharged.
  • the inverted bucket will have more or less buoyancy depending on what is inside of it, steam or condensate. With this in rnind, the operation can be described as follows:
  • Non-condensable gases whenever they reach the trap, escape through a small orifice on the top of the bucket and accumulate on the upper part of the trap until the trap opens, and they are discharged along with the condensate.
  • the trap inlet is always connected, through piping, to the equipment being drained, the trap body or chamber is always under pressure; this helps to discharge condensates when the trap opens.
  • the above described steam trap is generally considered as the most efficient, it has the disadvantage that it can not differentiate between live and flash steam; it will always close on either one. Moreover, if compressed air is piped into the trap, it will also close because, as described before, all of the three above fluids have less density than condensate and, therefore, they all cause the bucket to float and close the trap.
  • Non-condensable gases commonly air and carbon dioxide
  • Non-condensable gases get into the boiler dissolved in the water; as this evaporates, they are liberated along with the steam.
  • steam condenses these gases do not dissolve again and they must be removed because they not only do not transfer heat, but because they form an insulating barrier to heat transmission.
  • An ordinary steam trap can not extract these noncondensable gases efficiently because it only opens in the presence of condensate.
  • the continuous extraction device With the addition of the continuous extraction device, there is a constant f'low of steam and non-condensable gases, even though the trap may be closed. This means that some live steam is extracted before it transfers its heat, but the increase in the performance of the equipment more than upsets the apparent steam waste.
  • FIG. 1 is a sectional view of an inverted bucket steam trap, modified by an inventive steam and gases extraction device, showing the main component parts both internal and external;
  • FIG. 2 is also a sectional view of the steam trap but with a different mode of installation.
  • the trap is made of a hollow body 11, defining an internal chamber l2 which has a cap or cover 13 shaped like an inverted cup and connected to the internal chamber 12 by means of bolts across bores l5.
  • a closing wall 14 In a closing wall 14, there is a valve outlet 16 and a valve seat 17 located on the side of the wall 14 adjacent to the internal chamber 12.
  • an inverted bucket 18 Inside of the chamber 12, there is an inverted bucket 18 which has on its top a fixed hook 34 which serves to either push or pull a lever 19 containing a valve 20.
  • the hollow body 11 has in its lower part a concentric central annular boss 21 with an inside thread 22 to receive a stabilizing tube 23 which projects vertically up into the chamber 12, but without reaching the top of the bucket 18.
  • a threaded nipple 24 is connected to an internal thread 25 of a condensate inlet 26 to the hollow body 11.
  • Said nipple serves to connect a fitting 27 containing an internal, substantially annular chamber 28 to which the steam, gases and condensate enter through an opening 29.
  • a special coupling 30 with external thread connects to fitting 27 and through the internal thread to an extraction tube 31, which, on its other end, projects vertically above the stabilizing tube 23, almost reaching, but not touching the top of the invertedr bucket 18.
  • a deflector plate can be installed on the top of the extraction tube 31; this deflector plate serves the purpose of preventing the condensate to enter the extraction tube 31.
  • a combined gas trap and liquid separator comprising a hollow body including a cover and defining an internal chamber, an inverted bucket vertically movable inside said chamber, said cover having an outlet opening for liquid discharge from said chamber, means including a lever movably connecting said bucket to a part of said body, a valve operated by said lever and determining the closed condition of the outlet opening for a predetermined elevated position of said bucket, and determining an open condition of the outlet opening for bucket elevations below said position, an inlet connection for admitting fluid and comprising a first fixed conduit extending upwardly within said bucket to an elevation which is substantially offset from the upper end of said bucket and which is within said bucket for all possible bucket positions, and a gas-extraction outlet connection including a second fixed conduit extending upwardly within the bucket to an elevation which has a lesser offset from the upper end of said bucket, said second conduit extending externally of said body and inlet connection for conduct of extracted gas; whereby the difference in elevation for the respective offsets of said conduits from the upper end of said bucket serves to isolate vapor

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Separating Particles In Gases By Inertia (AREA)
US00322491A 1972-08-14 1973-01-10 Combined gas trap and liquid separator Expired - Lifetime US3842856A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MX13774572 1972-08-14

Publications (1)

Publication Number Publication Date
US3842856A true US3842856A (en) 1974-10-22

Family

ID=19745382

Family Applications (1)

Application Number Title Priority Date Filing Date
US00322491A Expired - Lifetime US3842856A (en) 1972-08-14 1973-01-10 Combined gas trap and liquid separator

Country Status (7)

Country Link
US (1) US3842856A (fi)
JP (1) JPS4959324A (fi)
BE (1) BE803552A (fi)
CA (1) CA964155A (fi)
DE (1) DE2340223C3 (fi)
FI (1) FI60925C (fi)
GB (1) GB1442441A (fi)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096876A (en) * 1976-07-02 1978-06-27 Armstrong Machine Works Condensate controller
US5655570A (en) * 1996-05-21 1997-08-12 Permea, Inc. Condensate drain device
US7931046B1 (en) * 2010-01-27 2011-04-26 Vallery Stafford J Steam trap with inverted bucket float

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1766970A (en) * 1927-10-07 1930-06-24 Adam E Armstrong Trap

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096876A (en) * 1976-07-02 1978-06-27 Armstrong Machine Works Condensate controller
US5655570A (en) * 1996-05-21 1997-08-12 Permea, Inc. Condensate drain device
US7931046B1 (en) * 2010-01-27 2011-04-26 Vallery Stafford J Steam trap with inverted bucket float

Also Published As

Publication number Publication date
FI60925B (fi) 1981-12-31
JPS4959324A (fi) 1974-06-08
DE2340223A1 (de) 1974-02-28
DE2340223C3 (de) 1981-12-17
DE2340223B2 (de) 1976-07-15
BE803552A (fr) 1973-12-03
GB1442441A (en) 1976-07-14
FI60925C (fi) 1982-04-13
CA964155A (en) 1975-03-11

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