US3807053A - Method and device for drying a compressed working fluid - Google Patents

Method and device for drying a compressed working fluid Download PDF

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Publication number
US3807053A
US3807053A US00271982A US27198272A US3807053A US 3807053 A US3807053 A US 3807053A US 00271982 A US00271982 A US 00271982A US 27198272 A US27198272 A US 27198272A US 3807053 A US3807053 A US 3807053A
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United States
Prior art keywords
drying
compressor
zone
working fluid
regeneration zone
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Expired - Lifetime
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US00271982A
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English (en)
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B Sylvan
N Agren
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Atlas Copco AB
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Atlas Copco AB
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    • 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
    • B01D53/261—Drying gases or vapours by adsorption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16—Filtration; Moisture separation

Definitions

  • ABSTRACT We disclose methods and means for drying a compressed working fluid in which a branch current of hot unsaturated working fluid is conducted directly from the compressor to the regeneration zone of a sorbtiondrying apparatus comprising a rotatable drying element driven by a motor. We also disclose means controlled by the unloading device of the compressor for disconnecting the driving of the drying element when the compressor unloads.
  • the present invention concerns a method and a device for drying a compressed working fluid such as air or some other gas compressed in a compressor. It is known to use so-called sorption-drying apparatus for drying air or other gases, whereby such apparatuses are referred to that comprise a vessel including a wateradsorbent, such as silica gel, lithium chloride or other like substances or water-absorbing material, such as asbestos sheathing, porous bodies or the like or a combination of both.
  • a wateradsorbent such as silica gel, lithium chloride or other like substances
  • water-absorbing material such as asbestos sheathing, porous bodies or the like or a combination of both.
  • a known drying element of this type consists of pleated asbestos sheathing, which has been impregnated with lithium chloride and possibly been armoured to resist the mechanical strains and which forms a rotor with a great number of axial channels, which rotor is arranged in a housing which includes separate conduits for the working fluid which is to be dried and for the fluid used for the regeneration. Drying plants of the above mentioned type for drying air of atmospheric pressure do not offer any great problem.
  • drying plants for compressed air or compressed gas are known.
  • a drawback with known drying plants for compressed air or compressed gas is that they include relatively expensive heat exchangers.
  • Another drawback is that they are sensitive to different loadings of the compressor.
  • known sorption-drying apparatuses comprising a rotatable drying element, the drying element is continuously driven by a motor. When the compressor runs unloaded, there is no fluid supplied to the regeneration zone of the drying apparatus for regeneration of the drying element. As a a consequence a wet part of the drying element may pass the regeneration zone when the compressor runs unloaded and thus enter the drying zone in a wet condition.
  • the invention is aiming to bring about a method and devices for drying a compressed working fluid by using a minimum of heat exchangers and by which the operating conditions of the compressor will not prejudice the drying result or the drying apparatus.
  • the invention is mainly characterized by those methods and devices that are stated in the below given claims.
  • FIG. 1 shows one embodiment of the invention.
  • FIG. 2 shows another embodiment of the invention.
  • the diagrams show examples of devices for carrying out the method in two different modifications.
  • the method according to the invention is based upon the novel concept that a compressed working fluid compressed in a compressor is dried by conducting a main current of the working fluid from the compressor through an after-cooler including a water separator and after that through a drying zone in a regenerative sorption-drying apparatus, and by conducting a branch current of hot unsaturated working fluid from the compressor through a regeneration zone in the drying apparatus and thereafter via an after-cooler including a water separator together with the main current through the drying zone to a delivery conduit.
  • the method according to the invention is based on the observation that the hot working fluid, which is delivered by the compressor, has such a high temperature and such a low relative moisture proportion that a branch current can be separated and used for regeneration by conducting it through a regeneration zone in the drying apparatus for carrying away the moisture which has been transferred to the regeneration zone from other parts of the drying apparatus, where it has earlier been taken up, through the rotation of the drying element.
  • the main current of the working fluid is conducted from the compressor through an after-cooler including a water separator and after that to the drying zone of the sorbtion-drying apparatus.
  • the branch current used for regeneration is suitably conducted via a cooler ineluding a water separator from the regeneration zone to the main current and together with this through the drying zone.
  • the method is suitably carried out so that the pressure in the regeneration zone always is kept somewhat lower than the pressure in the drying zone in order to permit a possible leakage of working fluid to pass from the dry part to the regeneration zone.
  • a compressor of arbitrary kind for instance a two-stage piston compressor or a screw compressor is indicated by 1, 33, which is driven by a motor 34 and supplied with working fluid, for instance air, via an intake filter 2 and a conduit 3.
  • the compressor may include an intermediate cooler as indicated at 35. From the compressor the hot compressed air flows through a conduit 4, 5 to an aftercooler 6 including a water separator from which the air flows as a main air current through a conduit 7 and an ejector 8 to a sorption-drying apparatus 9.
  • the sorption-drying apparatus 9 includes a rotor 10, which forms a drying element that in a known manner may consist of pleated asbestos sheating which has been impregnated with lithium chloride and reinforced in a suitable manner with a metal wire armanent or the like to resist the mechanical strains during different moisture conditions.
  • the rotor 10 is made in such a way that the working fluid is able to flow axially through the rotor through a great number of relatively thin channels.
  • a sector of the rotor is at its ends axially shielded with shields ll, 12 so that a regeneration zone 13 is formed in the rotor, which during the rotation of the rotor goes round the rotor in succession.
  • the rest of the rotor forms a drying zone 14.
  • a cooling zone may be formed between the regeneration zone 13 and the drying zone 14. This has for its purpose to cool the rotor material before it enters the drying zone.
  • the cooling may for instance be accomplished with dry gas or wet gas, which after having passed the cooling zone is conducted back to the main current in the same manner as the regeneration gas or together with it.
  • the rotor is driven by a motor 15 which, when the compressor is electrically driven, is suitably constituted by an electro-motor including a suitable gearing for reducing the number of revolutions to that at which the rotor rotates.
  • the motor is supplied with current from an electric line 16 via a switch 17, which is suitably manoeuvred with compressed air in connection with the unloading device 18 of the compressor via a manoeuvring-cylinder 19 which closes the switch 17 when the compressor is loaded.
  • the compressed air or compressed gas dried in the drying zone 14 is conducted to suitable consumers through a pressure conduit 20 for dry air or gas.
  • a branch conduit 21 is branched from the conduit 4, 5.
  • the conduit 21 includes a restriction 22 constituted by a throttle-disc or an adjustable throttle-valve.
  • a branch current of the working fluid is conducted directly from the pressure side of compressor through the conduit 21 to the regeneration zone 13 in the drying apparatus.
  • This branch current has in a compressor plant for a pressure of for instance 7 atmospheres above the atmospheric pressure, a temperature of more than 100 centigrades and at this temperature a low relative moisture proportion (for instance 20-30 percent) and can, therefore, partly heat the rotor material in the regeneration zone and partly carry away the moisture therefrom.
  • the branch current flows through the conduit 23 to a cooler 24 including a water separator and therefrom through a conduit 25 to the suctionside of the ejector 8.
  • the branch current is drawn into the main current by the ejector 8 and moves on together with the latter current into the drying zone 14 of the drying apparatus.
  • the after-cooler 6 includes a cooling element 26, which is fed with cooling-water through a conduit 27 and the cooler 24 includes a cooling element 28, which is fed with cooling-water from a conduit 29.
  • 30 and 31 are condensed-water separators of conventional kind included in the coolers.
  • the restriction 22 and the ejector 8 are so chosen and dimensioned that a somewhat lower pressure is obtained in the regeneration zone 13 than in the drying zone 14. By reason thereof any possible leakage from one zone to another will be constituted by dried air or dried working fluid flowing into the regeneration zone.
  • the plant according to FIG. 1 Upon occurrence of a possible decrease in the load ing of the compressor, the plant according to FIG. 1 will still work substantially as when fully loaded.
  • the compressor When the compressor is unloaded the main current through the cooler 6 and the conduit 7 is, however, interrupted and consequently no branch current can pass through the regeneration zone.
  • the device is, therefore, so made that the unloading device of the compressor upon unloading of the compressor, simultaneously disconnects the motor 15 which normally drives the drying element 10. Thereby a more reliable function of the drying apparatus is obtained, and the drying result will not be afiected.
  • the cooler 24 for the branch air current or branch gas current is eliminated and an ejector 32 has been arranged in the conduit leading to the after-cooler 6 instead of the ejector 8 in conduit 7.
  • the rest of the plant according to FIG. 2 is made in the same manner as the plant according to FIG. 1 and equivalent details have, therefore, been indicated with the same reference numerals as in FIG. 1 and will not be described again.
  • the working fluid current used for regeneration is in the modification according to FIG. 2 supplied through the conduit 23, 25 to the suction side of the ejector 32 and passes together with the main air current through the aftercooler 6.
  • P is higher than P, which is higher than P and higher than P which is the pressure in the regeneration zone.
  • P is higher than P
  • P which is higher than P
  • P which is the pressure in the regeneration zone.
  • the ejector 32 has to overcome a larger pressure decrease than the ejector 8 in the plant according to FIG. 1.
  • the cooler 6 in FIG. 2 will also become bigger than in FIG. 1.
  • the above described methods and devices are only to be regarded as examples which may be modified in different ways within the scope of the claims.
  • the ejectors may for instance be substituted by ordinary pumps.
  • electrical supervision devices for unloading may be used to supervise the motor electrically and disconnect it when unloading.
  • a pneumatically or hydraulically supervised pressure fluid motor may be arranged instead of 15.
  • the coolers 6, 24 may be air-cooled and the water separators 30, 31 may be introduced separate from the coolers.
  • the drying apparatus may consist of a number of drying towers or the like.
  • a device for drying a compressed working fluid comprising a compressor, an after-cooler including a water separator, a sorbtion-drying apparatus comprising a drying zone and a regeneration zone, a conduit for conducting hot working fluid from the compressor to the after-cooler, a conduit for conducting the cooled working fluid from the after-cooler to the drying zone, a branch conduit for conducting hot working fluid from the compressor to the regeneration zone for supplying hot unsaturated working fluid to the regeneration zone and a conduit for conducting working fluid from the regeneration zone via a cooler to the drying zone.
  • a device comprising a restriction in the branch conduit between the compressor and the regeneration zone.
  • a device in which an ejector is arranged in the conduit from the after-cooler to the drying zone and the conduit from the regeneration zone to the drying zone is connected to the suction side of the ejector.
  • a device in which an ejector is arranged in the conduit from the compressor to the after-cooler and the conduit from the regeneration zone to the drying zone is connected to the suction side of the ejector.
  • a device in which the restriction, the ejector and the flow resistances in the aftercooler, the regeneration zone and the conduits are so dimensioned that the pressure in the regeneration zone is somewhat lower than the pressure in the drying zone when the compressor is working loaded.
  • a device in which the restriction, the ejector and the flow resistances in the after-cooler, the regeneration zone and the conduits are so dimensioned that the pressure in the regeneration zone is somewhat lower than the pressure in the drying zone when the compressor is working loaded.
  • a device in which the sorption-drying apparatus comprises a motor driven rotatable element, an unloading device in the compressor and means controlled by the unloading device for disengaging said rotatable element upon unloading of the compressor.
  • a device for drying a compressed working fluid comprising a compressor, a regenerative sorbtiondrying apparatus comprising a rotatable drying element which is driven by a motor, an unloading device on the compressor and means controlled by the unloading device for disconnecting the driving of the drying element when the compressor unloads.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Gases (AREA)
  • Drying Of Solid Materials (AREA)
US00271982A 1971-08-06 1972-07-14 Method and device for drying a compressed working fluid Expired - Lifetime US3807053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE10087/71A SE365720B (fr) 1971-08-06 1971-08-06

Publications (1)

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US3807053A true US3807053A (en) 1974-04-30

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US00271982A Expired - Lifetime US3807053A (en) 1971-08-06 1972-07-14 Method and device for drying a compressed working fluid

Country Status (7)

Country Link
US (1) US3807053A (fr)
BE (1) BE787214A (fr)
DE (1) DE2238551C2 (fr)
FR (1) FR2148441B1 (fr)
GB (2) GB1349733A (fr)
IT (1) IT961891B (fr)
SE (1) SE365720B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994074A (en) * 1975-04-18 1976-11-30 W. R. Grace & Co. Liquid seal pump with sulfuric acid dehumidification
WO2001078872A2 (fr) 2000-04-13 2001-10-25 Atlas Copco Airpower, Naamloze Vennootschap Installation de compresseur dote d'un dispositif de sechage
WO2001087463A1 (fr) * 2000-05-17 2001-11-22 Atlas Copco Airpower, Naamloze Vennootschap Ensemble compresseur comportant un deshydrateur par adsorption et deshydrateur par adsorption
WO2002038251A1 (fr) * 2000-11-08 2002-05-16 Atlas Copco Airpower, Naamloze Vennootschap Procede de regulation d'une installation de compresseur avec deshydrateur et installation de compresseur correspondante
BE1016145A3 (nl) * 2004-08-02 2006-04-04 Atlas Copco Airpower Nv Verbeterde compressorinrichting.
WO2006081635A1 (fr) * 2005-02-01 2006-08-10 Atlas Copco Airpower, Naamloze Vennootschap Dispositif de dessiccation du gaz
WO2006099697A1 (fr) * 2005-03-21 2006-09-28 Atlas Copco Airpower, Naamloze Vennootschap Dispositif de refroidissement d’un gaz comprime
US20090038176A1 (en) * 2005-04-13 2009-02-12 Alfred Dotzler Multistage continuous dryer, especially for plate-shaped products
RU2617224C1 (ru) * 2015-11-11 2017-04-24 Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" Автомобильная газонаполнительная компрессорная станция
RU2617539C1 (ru) * 2015-11-11 2017-04-25 Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" Автомобильная газонаполнительная компрессорная станция
WO2022244641A1 (fr) * 2021-05-18 2022-11-24 コベルコ・コンプレッサ株式会社 Séchoir à adsorption et procédé de fonctionnement d'un séchoir à adsorption

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US4060913A (en) * 1976-08-02 1977-12-06 Takasago Thermal Engineering Co., Ltd Assembly for dehydrating air to be supplied to blast furnace
DE2949879A1 (de) * 1979-12-12 1981-06-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kompressor-einheit fuer hochleistungs-schalter
US4480393A (en) * 1981-06-15 1984-11-06 Minnesota Mining And Manufacturing Company Vapor recovery method and apparatus
JPS59127626A (ja) * 1982-12-16 1984-07-23 Daikin Ind Ltd ガス除湿装置
DE3425084A1 (de) * 1983-07-08 1985-01-17 Rolf 3160 Lehrte Deiters Vorrichtung zur trocknung eines luftstromes
AT381272B (de) * 1984-08-07 1986-09-25 Amann Gottfried & Sohn Regelanordnung fuer die temperatur eines von einem kuehlmedium durchstroemten kunststoffverarbeitungs- werkzeuges
PT80915B (pt) * 1984-08-07 1987-08-19 Amann Gottfried & Sohn Processo para a eliminacao de fenomenos de condensacao em ferramentas para o tratamento e transformacao de materiais plasticos submetidas a arrefecimento
FR2576399B1 (fr) * 1985-01-18 1989-03-31 Abg Semca Procede de conditionnement d'atmosphere et climatiseur mettant en oeuvre le procede
DE3667923D1 (de) * 1985-05-28 1990-02-08 Altvater J Verfahren zur behandlung von klaergas, deponiegas o. dgl.
JPH0253121U (fr) * 1989-03-30 1990-04-17
BE1005764A3 (nl) * 1992-04-15 1994-01-18 Atlas Copco Airpower Nv Inrichting voor het drogen van een gas.
BE1010132A3 (nl) * 1996-04-02 1998-01-06 Atlas Copco Airpower Nv Werkwijze en inrichting voor het drogen van een door een compressor samengeperst gas.
US6247314B1 (en) * 1998-01-30 2001-06-19 Ingersoll-Rand Company Apparatus and method for continuously disposing of condensate in a fluid compressor system
US7905097B1 (en) * 2009-10-05 2011-03-15 Hamilton Sundstrand Corporation Water-from-air system using a desiccant wheel
EP2332631B1 (fr) 2009-12-03 2012-11-14 Kaeser Kompressoren GmbH Dispositif de séchage par adsorption ainsi que procédé de séchage par adsorption
DE202009019161U1 (de) 2009-12-03 2017-05-05 Kaeser Kompressoren Se Adsorptionstrocknungsvorrichtung
DE202014007507U1 (de) 2013-09-18 2014-12-12 Atlas Copco Airpower N.V. Trockner für verdichtetes Gas und mit einem Trockner ausgestattete Verdichteranlage
WO2016205902A2 (fr) 2015-06-23 2016-12-29 Katholieke Universiteit Leuven Ku Leuven Research & Development Compositions et méthodes pour le traitement de biofilms
BE1023302B1 (nl) 2015-07-23 2017-01-26 Atlas Copco Airpower Naamloze Vennootschap Werkwijze voor het vervaardigen van een adsorptiemiddel voor het behandelen van samengeperst gas, adsorptiemiddel verkregen met zulke werkwijze en adsorptie-inrichting voorzien van zulk adsorptiemiddel
DK3344367T3 (da) 2015-08-31 2020-12-07 Atlas Copco Airpower Nv Adsorptionsindretning til komprimeret gas
BE1024396B1 (nl) 2016-10-25 2018-02-13 Atlas Copco Airpower Naamloze Vennootschap Compressorinstallatie met drooginrichting voor samengeperst gas en werkwijze voor het drogen van samengeperst gas.
US20220161186A1 (en) * 2019-04-24 2022-05-26 Atlas Copco Airpower, Naamloze Vennootschap Compressor installation and method for delivering a compressed gas
BE1027361B1 (nl) * 2019-06-12 2021-01-20 Atlas Copco Airpower Nv Compressorinstallatie en werkwijze voor het leveren van samengeperst gas
BE1027504B1 (nl) * 2019-08-16 2021-03-15 Atlas Copco Airpower Nv Droger voor samengeperst gas, compressorinstallatie voorzien van droger en werkwijze voor het drogen van samengeperst gas

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994074A (en) * 1975-04-18 1976-11-30 W. R. Grace & Co. Liquid seal pump with sulfuric acid dehumidification
WO2001078872A2 (fr) 2000-04-13 2001-10-25 Atlas Copco Airpower, Naamloze Vennootschap Installation de compresseur dote d'un dispositif de sechage
BE1013389A3 (nl) * 2000-04-13 2001-12-04 Atlas Copco Airpower Nv Compressorinstallatie voorzien van een drooginrichting.
WO2001078872A3 (fr) * 2000-04-13 2002-08-15 Atlas Copco Airpower Nv Installation de compresseur dote d'un dispositif de sechage
WO2001087463A1 (fr) * 2000-05-17 2001-11-22 Atlas Copco Airpower, Naamloze Vennootschap Ensemble compresseur comportant un deshydrateur par adsorption et deshydrateur par adsorption
BE1013441A3 (nl) * 2000-05-17 2002-01-15 Atlas Copco Airpower Nv Compressorinstallatie voorzien van een adsorptiedroger en adsorptiedroger daarvoor.
US20030163929A1 (en) * 2000-05-17 2003-09-04 Danny Etienne Andree Vertriest Compressor unit, provided with an adsorption dryer and adsorption dryer therefor
WO2002038251A1 (fr) * 2000-11-08 2002-05-16 Atlas Copco Airpower, Naamloze Vennootschap Procede de regulation d'une installation de compresseur avec deshydrateur et installation de compresseur correspondante
BE1013828A3 (nl) * 2000-11-08 2002-09-03 Atlas Copco Airpower Nv Werkwijze voor het regelen van een compressorinstallatie met een droger en daarbij gebruikte compressorinstallatie.
BE1016145A3 (nl) * 2004-08-02 2006-04-04 Atlas Copco Airpower Nv Verbeterde compressorinrichting.
WO2006081635A1 (fr) * 2005-02-01 2006-08-10 Atlas Copco Airpower, Naamloze Vennootschap Dispositif de dessiccation du gaz
BE1016430A3 (nl) * 2005-02-01 2006-10-03 Atlas Copco Airpower Nv Inrichting voor het drogen van gas.
US20080256820A1 (en) * 2005-02-01 2008-10-23 Atlas Copco Airpower, Naamloze Vennootschap Gas Drying Device
US7757407B2 (en) 2005-02-01 2010-07-20 Atlas Copco Airpower, Naamloze Vennootschap Gas drying device
AU2006209812B2 (en) * 2005-02-01 2010-08-26 Atlas Copco Airpower, Naamloze Vennootschap Gas drying device
WO2006099697A1 (fr) * 2005-03-21 2006-09-28 Atlas Copco Airpower, Naamloze Vennootschap Dispositif de refroidissement d’un gaz comprime
BE1016558A3 (nl) * 2005-03-21 2007-01-09 Atlas Copco Airpower Nv Inrichting voor het koelen van een gecomprimeerd gas.
US20090038176A1 (en) * 2005-04-13 2009-02-12 Alfred Dotzler Multistage continuous dryer, especially for plate-shaped products
RU2617224C1 (ru) * 2015-11-11 2017-04-24 Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" Автомобильная газонаполнительная компрессорная станция
RU2617539C1 (ru) * 2015-11-11 2017-04-25 Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" Автомобильная газонаполнительная компрессорная станция
WO2022244641A1 (fr) * 2021-05-18 2022-11-24 コベルコ・コンプレッサ株式会社 Séchoir à adsorption et procédé de fonctionnement d'un séchoir à adsorption

Also Published As

Publication number Publication date
SE365720B (fr) 1974-04-01
GB1349733A (en) 1974-04-10
FR2148441B1 (fr) 1978-02-10
DE2238551C2 (de) 1989-01-12
FR2148441A1 (fr) 1973-03-23
IT961891B (it) 1973-12-10
BE787214A (fr) 1972-12-01
GB1349732A (en) 1974-04-10
DE2238551A1 (de) 1973-02-15

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