GB2494291A - A device for removing moisture from a gas stream - Google Patents

A device for removing moisture from a gas stream Download PDF

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Publication number
GB2494291A
GB2494291A GB1215446.4A GB201215446A GB2494291A GB 2494291 A GB2494291 A GB 2494291A GB 201215446 A GB201215446 A GB 201215446A GB 2494291 A GB2494291 A GB 2494291A
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GB
United Kingdom
Prior art keywords
gas
text
vessel
outlet
flow
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.)
Granted
Application number
GB1215446.4A
Other versions
GB2494291B (en
GB201215446D0 (en
Inventor
Daniel Paris
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.)
AES Engineering Ltd
Original Assignee
AES Engineering 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 AES Engineering Ltd filed Critical AES Engineering Ltd
Publication of GB201215446D0 publication Critical patent/GB201215446D0/en
Publication of GB2494291A publication Critical patent/GB2494291A/en
Application granted granted Critical
Publication of GB2494291B publication Critical patent/GB2494291B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/30—Accessories for evaporators ; Constructional details thereof
    • B01D1/305—Demister (vapour-liquid separation)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
    • B01D5/0015—Plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0054—General arrangements, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/038—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of perforated plates defining expansion chambers associated with condensation and collection chambers, e.g. for adiabatic expansion of gases and subsequent collection of condensed liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0433—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a deflection device, e.g. screen

Abstract

A device for removing moisture from a gas, comprises an elongated vessel (1) having a gas outlet (2) at one end, a moisture outlet (3) at the other end and a gas inlet located between said gas outlet and said moisture outlet. The said vessel includes first (5) and second (6) gas flow modifying means for causing deviation of the flow of gas within the vessel from a flow path extending directly between said gas inlet and said gas outlet. The first gas flow modifying means are in the form of a plate extending partly across the vessel and arranged to direct the gas flow from the vessel in a direction towards said moisture outlet. The said second gas flow modifying means are in the form of at least one plate extending across the vessel. The perforations of plate (6) may be in the form of elongated slots, which are laterally displaced. An optional feature is a demister pad, preferably comprising a mesh formed of monofilament wire.

Description

Liquid knockout drum
Field of Invention
The invention relates to a vertical liquid knockout drum which removes liquid particles from a gas stream.
Background to Invention
There are many industrial applications for devices which serve to remove entrained liquid particles from a gas stream. One particular instance of this device is a gas inlet vessel for gas seals. At sealing pressure, some components of a gas stream can condense to form liquids, contaminating the seal carrier. Any liquid particles that accumulate on the face of the seal will affect the performance of the seal and possibly cause premature failure of the seal.
The common method for removing the liquid particles from a gas stream comprises a knockout vessel which is sized appropriately in relation to the velocity at which the gas stream is required to travel for moisture to be removed. In many such vessels, a mist eliminator is provided to enhance the efficiency of the vessel. The conventional arrangement is a mesh pad located immediately below the gas outlet. However, after time, the demister pad may become clogged and less effective.
Statement of the Invention
According to the present invention there is provided, a device for removing moisture from a gas, the device comprising an elongated vessel having a gas outlet at one end, a moisture outlet at the other end and a gas inlet located between said gas outlet and said moisture outlet, said vessel including first and second gas flow modifying means for causing deviation of the flow of gas within the vessel from a flow path extending directly between said gas inlet and said gas outlet, said first gas flow modifying means being in the form of a plate extending partly across the vessel and arranged to direct the gas flow from the vessel in a direction towards said moisture outlet, said second gas flow modifying means being in the form of at least one plate extending across the vessel and having flow deflecting perforations thereth rough.
Accordingly, the present invention provides a second stage of liquid removal designed to induce a small pressure change on the wet gas at certain points within the vessel and force the gas stream to move through a tortuous path, facilitating the siphoning off of liquid particles.
Preferably the second gas flow modifying means comprises at least one plate having a plurality of elongate slots therein. More preferably, each slot has opposed elongate edges which are laterally displaced from each other. Each slot may be formed by pressing a section of material out of the plane of the plate to form a hooded orifice.
Preferably, the device includes a demister pad. More preferably, the demister pad comprises a mesh formed of monofilament wire.
Brief description of drawings
Figure 1 is a longitudinal section of a device of the present invention; Figure 2 is a perspective view of the device of Figure 1, partly cut away to show the interior of the device and; Figure 3 in a perspective view of the flow modifying elements of the device of Figure 1.
Detailed description
The present invention will be described, by way of example only, with reference to the accompanying drawings.
Referring to Figure 1 of the accompanying drawings there is illustrated a vessel (1), having a gas outlet at one end (2), a moisture outlet (3) at the other end and a gas inlet (4) situated between said gas outlet and said moisture outlet. This vessel includes three stages of liquid removal. The first stage consists of an angled baffle (5) modifying the direction of gas flow and causing the entrained moisture in the gas flow to be siphoned off. The present invention comprises a second stage of liquid removal. It exists, in this embodiment of the present invention! in the form of two plates (6) extending across the vessel) similarly modifying the direction of gas flow by forcing the gas through a number of hooded perforations (7) contained within said plate. The third stage of liquid removal consists of a demister pad (8) made up of monofilament wire constructed in a mesh arrangement. Each segment of the demister pad is supported by support grids (9). This third stage liquid removal serves to trap moisture contained within the gas stream, with the result that only dry gas manages to reach the gas outlet (2).
Referring to Figure 2 of the accompanying drawings there is illustrated an isometric cross section of the vessel as described with reference to Figure 1.
Referring to Figure 3 of the accompanying drawings there is illustrated an isometric embodiment of the present invention shown independent from the vessel described above with reference to Figures 1 and 2 but forming part of a connecting unit which supports stages 1 and 2 of liquid removal. The unit comprises a first panel (10) containing twelve circular orifices serving to direct moisture towards the moisture outlet. A central support shaft (11) extends vertically upwards from the panel (10) accommodating an angled baffle (5) and supporting the two plates (6) which comprise the present invention. The second plate is rotated 90 degrees from the position of the first plate, each plate serving as first and second gas flow modifying means. Each plate contains twelve elongate hooded slots (7) which are of equal dimension and arranged in the same orientation.

Claims (1)

  1. <claim-text>Claims 1. A device for removing moisture from a gas, comprises an elongated vessel (1) having a gas outlet (2) at one end, a moisture outlet (3) at the other end and a gas inlet located between said gas outlet and said moisture outlet. The said vessel includes first (5) and second (6) gas flow modifying means for causing deviation of the flow of gas within the vessel from a flow path extending directly between said gas inlet and said gas outlet. The first gas flow modifying means are in the form of a plate extending partly across the vessel and arranged to direct the gas flow from the vessel in a direction towards said moisture outlet. The said second gas flow modifying means are in the form of at least one plate extending across the vessel and having flow deflecting perforations therethrough.</claim-text> <claim-text>2. A device according to claim 1, wherein the second gas flow modifying means comprises at least one plate having a plurality of elongate slots therein.</claim-text> <claim-text>3. A device according to claim 2, wherein each slot has opposed elongate edges which are laterally displaced from each other.</claim-text> <claim-text>4. A device according to claim 3, wherein each slot is formed by pressing a section of material out of the plane of the plate to form a hooded orifice.</claim-text> <claim-text>5. A device according to any of the preceding claims, wherein the device includes a demister pad.</claim-text> <claim-text>6. A device according to Claim 5, wherein the demister pad comprises a mesh formed of monofilament wire.</claim-text> <claim-text>7. A device according to Claim 1 and substantially as herein described.</claim-text> <claim-text>8. A device for removing moisture from a gas, the device being substantially as described herein with reference to the accompanying drawings.</claim-text> <claim-text>9. A flow modifier for use in a device according to any of the preceding claims, said modifier including first and second gas flow modifying means for causing deviation of the flow of gas within the vessel from a flow path extending directly between said gas inlet and said gas outlet, said first gas flow modifying means being in the form of a plate extending, in use, partly across the vessel and arranged to direct the gas flow from the vessel in a direction towards said moisture outlet, said second gas flow modifying means being in the form of at least one plate extending, in use, across the vessel and having flow deflecting perforations therethrough.S</claim-text>
GB1215446.4A 2011-08-30 2012-08-30 Liquid knockout drum Active GB2494291B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1114871.5A GB201114871D0 (en) 2011-08-30 2011-08-30 Liquid knockout drum

Publications (3)

Publication Number Publication Date
GB201215446D0 GB201215446D0 (en) 2012-10-17
GB2494291A true GB2494291A (en) 2013-03-06
GB2494291B GB2494291B (en) 2018-08-08

Family

ID=44838854

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB1114871.5A Ceased GB201114871D0 (en) 2011-08-30 2011-08-30 Liquid knockout drum
GB1215446.4A Active GB2494291B (en) 2011-08-30 2012-08-30 Liquid knockout drum

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB1114871.5A Ceased GB201114871D0 (en) 2011-08-30 2011-08-30 Liquid knockout drum

Country Status (2)

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US (1) US9149751B2 (en)
GB (2) GB201114871D0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9551282B2 (en) * 2014-10-17 2017-01-24 General Electric Company Media pads with mist elimination features
CN108014510A (en) * 2018-01-12 2018-05-11 无锡宝南机器制造有限公司 A kind of ring bell-type vapor-liquid separation structure applied to MVR crystallizers
US11207627B2 (en) * 2018-10-17 2021-12-28 University Of Kentucky Research Foundation Filter assembly and scrubber section for a continuous miner
CN110354586A (en) * 2019-08-21 2019-10-22 华北电力大学 A kind of streamlined demister of fluoroplastics and demisting technique
FR3105011B1 (en) * 2019-12-19 2021-12-03 Seb Sa Water filtration cartridge and associated portable filtration device for filling domestic appliance tanks
CN114558384B (en) * 2022-03-28 2024-03-22 北京亿华通科技股份有限公司 Visual gas-liquid separation of air current

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997303A (en) * 1975-05-01 1976-12-14 Air Products And Chemicals, Inc. Liquid-gas phase separator having a perforated plate and mist eliminator pad
US4842622A (en) * 1988-03-31 1989-06-27 Wamsley Jr Robert H Gas/liquid/solids separator
US5983996A (en) * 1998-09-15 1999-11-16 Romero; Elmer Steam condenser
WO2006132527A1 (en) * 2005-06-10 2006-12-14 Fmc Technologies C. V. System and inlet device for separating a mixture
US20070289722A1 (en) * 2006-05-23 2007-12-20 Bayer Material Science Ag Devices for cooling gases which form a corrosive condensation product upon cooling

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443233A (en) * 1982-08-27 1984-04-17 Monsanto Company Mist separator
ATE388748T1 (en) * 2003-09-09 2008-03-15 Shell Int Research GAS/LIQUID SEPARATOR

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997303A (en) * 1975-05-01 1976-12-14 Air Products And Chemicals, Inc. Liquid-gas phase separator having a perforated plate and mist eliminator pad
US4842622A (en) * 1988-03-31 1989-06-27 Wamsley Jr Robert H Gas/liquid/solids separator
US5983996A (en) * 1998-09-15 1999-11-16 Romero; Elmer Steam condenser
WO2006132527A1 (en) * 2005-06-10 2006-12-14 Fmc Technologies C. V. System and inlet device for separating a mixture
US20070289722A1 (en) * 2006-05-23 2007-12-20 Bayer Material Science Ag Devices for cooling gases which form a corrosive condensation product upon cooling

Also Published As

Publication number Publication date
GB201114871D0 (en) 2011-10-12
US9149751B2 (en) 2015-10-06
US20130047562A1 (en) 2013-02-28
GB2494291B (en) 2018-08-08
GB201215446D0 (en) 2012-10-17

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