US3668785A - Integrated drying processes and apparatus - Google Patents

Integrated drying processes and apparatus Download PDF

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Publication number
US3668785A
US3668785A US47643A US3668785DA US3668785A US 3668785 A US3668785 A US 3668785A US 47643 A US47643 A US 47643A US 3668785D A US3668785D A US 3668785DA US 3668785 A US3668785 A US 3668785A
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United States
Prior art keywords
web
air
drying
turbine
gas
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US47643A
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English (en)
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Stephen Anthony Rodwin
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General Electric Canada Co
Valmet Montreal Inc
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DOMINIAN ENG WORKS Ltd
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Assigned to VALMET-DOMINION INC. reassignment VALMET-DOMINION INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CANADIAN GENERAL ELECTRIC COMPANY LIMITED,, DOMINION ENGINEERING WORKS LIMITED
Assigned to VALMET-DOMINION INC. reassignment VALMET-DOMINION INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPANIE GENERAL ELECTRIQUE DU CANADA LIMITEE
Assigned to CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPAGNIE GENERALE ELECTRIQUE DU CANADA LIMITEE reassignment CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPAGNIE GENERALE ELECTRIQUE DU CANADA LIMITEE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DOMINION ENGINEERING WORKS LIMITED
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/02—Drying solid materials or objects by processes not involving the application of heat by using ultrasonic vibrations

Definitions

  • the present invention is directed to the use of a process gas turbine in a drying system in which the function of the turbine is utilized in a novel and effective fashion.
  • Selection of an appropriate drying system or combination of systems, including the adoption of novel drying processes is dependent on the effective energy-utilization afiorded by such systems, measured on a basis of thermal units of energy per pound of water removed. Prior test results are available for determination of many such values.
  • Sonic drying provides mechanical displacement of moisture to the web surface or surfaces, while an air impingement drying process which normally removes moisture primarily by evaporation from the web surface is particularly compatible therewith if applied in sequence, when the respective processes operate in the moisture ranges to which they are best suited.
  • An increase in temperature of compressed air supplied to the sonic generators obtained by preheating the compressor inlet, or alternatively and less economically by reheating the compressor air output;
  • auxiliary heat provision may be obtained from the gas turbine exhaust side directly or by use of heat exchangers.
  • a combined total drying process utilizing a process gas turbine having in one instance a gaseous output for sonic and impingement drying, and in another instance an electrical output as for microwave moisture profiling and combined in each instance with a heat drying process using turbine thermal exhaust for a heat drying process may provide significant cost advantages over a corresponding system utilizing commercial electrical supply and gaseous fluid heating and pressurizing obtained by conventional means.
  • the present invention thus provides a method of utilizing both the mechanical and thermal output of a gas turbine in web drying, whereby the absence of optimum component efficiency in compression or expansion tends merely to change the balance achieved between useful thermal output and useful mechanical output.
  • a medium efficiency gas turbine wherein pressure expansion is not fully optimized, the cost of the turbine may be significantly reduced, while utilization of the machine as a hot gas generator is enhanced by the higher exhaust pressure available to move the hot exhaust gases externally of theturbine to the components of the drying apparatus.
  • blading and closeness of blading tolerances are typical of the area in which increase in tolerances and clearances can greatly promote cost'reduction at an acceptable loss of power generating efficiency in the environment of the present invention.
  • pressurized gas from the compressor may be used to drive such type of sound generators, while in addition heat recovery both from compressor air and from turbine exhaust gases may be used in sonic drying and impingement flow drying respectively against web surfaces, or for through drying, and in heat exchangerelation with steam generators for the provision of process steam in the paper mill, or for the provision of steam to heat conventional dryer cylinders.
  • suitable mechanical filtering may be effected using exchangeable sintered ceramic filter cartridges.
  • the power loss is minimized, owing to reduced air velocities, while secondary air may be bypassed around the filter, to reduce the losses thereat and to minimize the required filter capacity.
  • This arrangement provides the added advantage that the expansion turbine is thus operated on clean gas, with consequently improved serviceability.
  • the temperature drop across the filter can be readily compensated for by operating the combustor at a higher temperature to provide the desired turbine inlet temperature.
  • the pressure drop resulting from the diffusion of air through the whistle devices reduces over-pressure within the sound hood to nearly atmospheric pressure thereby providing acceptable levels for structure economy and practicality.
  • the need to displace the hood from the web for carrying out the web threading operation is an important consideration in this matter of pressure diffusion and the reduction of hood mass consequent therefrom.
  • the use of a compressor of medium efficiency is contemplated, delivering air at a pressure in the range of -40 psig to the whistle sound generators.
  • a heat exchanger or air recirculating means to raise air temperature at the compressor inlet from ambient to a value in the range of -l40 F promotes efficient sound generation in the stem jet whistles and provides hotter resonated web impingement air, at exit from the whistles.
  • Whistle inlet temperatures in the range from 280400 F. are contemplated, using compression heating, with or without additional heating or hot air blending to achieve the desired air temperature.
  • FIG. 1 is a diagrammatic representation of a gas turbine and combined web drying arrangement, showing a first embodiment of the subject invention
  • FIG. 2 is a similar representation of a second embodiment
  • FIG. 3, appearing with FIG. 1 shows a hot gas filtering arrangement.
  • the gas turbine installation 10 consists of a compressor section 12, and gas turbine section 16 mechanically coupled together, and a combustor 14.
  • An electrical generator 24 or motor-generator is also driven by the turbine 16, being coupled as by a clutch to the machine and serving the dual function if desired of starter motor or power generator.
  • the external energy output connections of the gas turbine 10 are represented by an air bleed.20from a first section 17 of the compressor 12, and exhaust gas output 22 from the turbine section 16. 1
  • mechanical energy in the form of compressed air from compressor section 17 passes by way of conduit 20 to sonic drying section 30, illustrated as being a drum type sonic dryer as disclosed in co-pending application Ser. No. 86,571, Nov. 3, I970.
  • Thermal energy from the turbine exhaust 22 passes to an impingement type dryer section 40 of a type well known in the a
  • the compressed air supply 20 connects with reheater 31 of the sonic dryer section 30, the air then passing by way of conduit 32 to the air supply headers 33.
  • a plurality of headers 33 extend transversely of drum 35 on which the drying web 36 is supported.
  • a plurality of sonic generators 37 such as stem jet whistles are spaced along each header'33, to receive heated compressed clean air therefrom.
  • Each header 33 is illustrated as serving a trough-like reflector 38 extending for the width of the drum 35.
  • Secondary low pressure web impingement gas from the reheater 31 passes by way of conduit 41 to impingement air manifolds 42 mounted adjacent the respective reflector troughs 38, being co-extensive therewith across the web width.
  • impingement air manifolds 42 mounted adjacent the respective reflector troughs 38, being co-extensive therewith across the web width.
  • a jet or curtain of air from the inclined slot nozzles indicated diagramatically at 142 sweeps the surface of the moving web in moisture scouring relation, the gas mixture input to the reheater 31 being obtained indirectly from the turbine exhaust 22, described in detail below.
  • the curtain jet 142 produces gas motion within the reflectors 38, with gas exhausting from the oncoming edge of the respective reflectorin the direction opposite to web motion, thus enhancing boundary clearing at the surface of the web.
  • the impingement dryer section 40 comprises a drying cylinder or roll 45 illustrated as a non-perforated roll over which the web 36 passes.
  • a perforated roll to provide through drying is also contemplated, as is well known in the art.
  • the impingement dryer 40 has a cap 46, a circumferential partition 47 spaced therefrom to define a hot air manifold 49;
  • an inner, perforate partition 47 defining with the partition 47 an exhaust manifold 48, and nonle tubes 50 extending between the manifold 49 and the annular space 51 extending between the manifold 49 and to adjacent the drum surface, in the impingement dryer zone through which web 36 passes.
  • Hot gas mixture from the exhaust 22 of turbine section 16 passes by way of replaceable filters 55 to series of gas injectors 56 of the well known type, each having a noule and venturi section 57.
  • Hot exhaust gas induces fluid input to the injectors 56, by way of entries 59, 60, representing fresh air intake and process return respectively, the flow thereof being controlled by dampers (not shown) to form a mixture which blends with the exhaust gas to lower the air temperature and promote suitable psychrometric drying conditions.
  • a portion of the blended mixture passes by way of conduit 61 to the dryer high pressure manifold 49, the pressure thereof being controlled by throttling damper 63 in the conduit 61.
  • a further portion of the blended exhaust passes from the injector 56 by way of conduit 65 to heat exchanger 67, and thence to reheater 31 of the sonic dryer 30.
  • the blended exhaust from conduit 65 is cooled in exchanger 67 and further cooled in reheater 31, passing thence by way of conduit 41 to the sonic dryer,-as impingement air of suitable psychometric quality.
  • the heat exchanger 67 receives fresh air by way of inlet 71,
  • Moist exhaust air from the exhaust manifold 48 of dryer 40 passes by way of conduit 75 to the inlet 60 of the injector 56.
  • the moist exhaust of the sonic dryer 30, which flows along the web in a direction opposite to web travel is removed from the respective cap space 35, possibly for heat recovery in another portion of the total dryer installation.
  • the web 36 passes first through the sonic dryer section 30 and then through the impingement dryer.
  • the provision of steam heat to the ,drum 45 is not dealt with specifically herein, but one steam raising arrangement using turbine exhaust heat as detailed below may be used alte'matively to normal practice. While the compressor 16 is shown having subsequent low pressure and high pressure sections, the use of two separate compressor sections driven by the common shaft is contemplated, for improved flow control of the power turbine compressor, and more flexible utilization in dryer application.
  • the gas turbine is illustrated as being optionally coupled by way of clutch 11 to the generator 24.
  • the pre-heater 19 which is not shown may be used, or an air mixing arrangement may be provided instead utilizing recirculated hot air, to provide seasonal temperature compensation.
  • a conventional steam drum dryer section 130 is shown, to which steam is supplied to the drums 133 by way of header 131 from boiler 132.
  • the boiler 132 is shown as being fossil fueled, by way of burners 135, and receives turbine exhaust gas by way of conduit 122 to support combustion and impart heat from the hot incoming gas. Owing to the excess air available in the turbine ,exhaust such after burning may be practically achieved to generate steam.
  • the boiler exhaust illustrated as leaving by way of filter 137 passes to series of injectors 156, the output 161 of which supplies impingement dryer 140 for two sided impingement web drying. Flow connections to the top side only of the dryer 140 are shown, the bottom connections being omitted for purposes of clarification.
  • the exhaust outlet 163 from the dryer 140 is partially recycled as blending gas by return to the injector 156.
  • a damper controlled air feed 178 permits the admission of controlled quantities of air to the injector 156.
  • a portion of the injector output is directed by way of conduit 170 to a hood economizer 175, to preheat incoming fresh hood air.
  • the further use of a spray injector to provide hot process water while further cooling this exhaust gas is contemplated.
  • the exhaust gas branch line 177 having a control throttle therein is proposed to provide motive fluid for an impingement flow process, such as dryer 45 shown in FIG. 1.
  • an impingement flow process such as dryer 45 shown in FIG. 1.
  • the operating pressure in the conduit or line 177 is sustained sufficiently above atmosphere that necessary circulation may be maintained.
  • a particular characteristic of the subject invention is the maintenance of gas turbine exhaust pressure at a sufficient value that provision of auxiliary blowers for moving drying air is substantially eliminated, the apparent loss of efiiciency represented by this higher exhaust pressure and the corresponding higher temperature, is recovered in operating and capital costs, while the drying processes may be based on the higher gas temperatures thus made available, thereby recovering the apparent loss of potential thermal energy resulting from the reduced expansion ratio of the turbine section.
  • microwave generators 198 of which only one is shown, to energize a web dryer 200 having opposed microwave transmitters 202.
  • Such additional drying utilization enhances the flexibility and balanced drying made possible using a gas turbine and combined processes, while providing web drying capability particularly suitable for wet streak control, particularly in the case of coated webs but which is usually too costly on a conventional energy 'cost basis to prove economic.
  • a high total thermal fuel utilization may be achieved in the process.
  • FIG. 3 an arrangement for direct filtration of hot cycle gas is illustrated.
  • the combustor 314, located intermediate the compressor 310 and expansion turbine 316 is provided with an output filter 329 having a plurality of replaceable plates, which may be of cartridge form.
  • the combustor 314 receives compressed air by conduit 318, the primary air passing by conduit 320 to the flame tube 315.
  • Bypass air by way of conduit 322 passes control throttle 323 and flows in heat exchange relation about the flame tube 315. A portion of the bypass air may enter theflame tube 315 in known fashion as secondary combustion air, and to cool the flame tube walls.
  • Hot combustion products'pass by wayof conduit 327 to the filter 329, and an exit therefrom mixes with heatedbypass air from conduit 325, and thence'enters the expansion turbine 316 by way of conduit 330.
  • the filter or filters 329 which may comprise a plurality of individual filters in parallel or standby relation, servicing of the filter may be effectedto provide continuous filter capability.
  • Sintered ceramic filters of sufficient area cross section and, porosity are selected to effect the desired degree of combustion product filtration and to ensure acceptable pressure drop valves between the compressor 310 and expansion turbine 316.
  • steam generated or heated by exchange with the exhaust gas may be used as process steam for purposes other than in dryer roll heating.
  • the subject invention is particularly meritorious in the flexibility of low cost high speed drying made possible, including particular capability in web streak control, by suitable combination of drying methods.
  • microwave energy utilizing a lossy media to generate heat in the web is contemplated.
  • Web drying apparatus comprising a gas turbine machine, pre-heater. means to raise the temperature of air entering a compressor portion of the machine, air bleed means to extract uncombusted air from the compressor, sonic actuated web drying means receiving the extracted air for cnergization in moisture dislocating operation relative to a travelling web, and gaseous impingement web drying means, means to pass exhaust gas from a turbine portion of the machine to the impingement drying means, and heat interchange means for controlling the psychrometric condition of gaseous fluid impinging on a said web.
  • Apparatus as claimed in claim 1 including gaseous induction means to induce flow of web conditioning gaseous fluid.
  • Apparatus as claimed in claim 1 including electrical generating means powered by said turbine machine, and web drying apparatus energized thereby.
  • Apparatus as claimed in claim 1 including hot gas filter means to filter post-combustion gases prior to utilization thereof in a said drying means.
  • Apparatus as claimed in claim 1 including hot gas filter means interposed between a combustor portion of said machine and said turbine to remove impurities of a predeter mined size range from said hot gas before admission of the gas to the turbine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
US47643A 1969-08-18 1970-06-19 Integrated drying processes and apparatus Expired - Lifetime US3668785A (en)

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CA059712A CA937045A (en) 1969-08-18 1969-08-18 Integrated drying processes and apparatus

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CA (1) CA937045A (xx)
DE (1) DE2038289C3 (xx)
FR (1) FR2058145A5 (xx)
GB (1) GB1311364A (xx)
SE (1) SE365605B (xx)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027391A1 (en) * 1996-12-17 1998-06-25 Ecopower Technology Oy Method and apparatus for producing heated air for different applications of use
US6085437A (en) * 1998-07-01 2000-07-11 The Procter & Gamble Company Water-removing apparatus for papermaking process
US6308436B1 (en) 1998-07-01 2001-10-30 The Procter & Gamble Company Process for removing water from fibrous web using oscillatory flow-reversing air or gas
US6393719B1 (en) 1998-07-01 2002-05-28 The Procter & Gamble Company Process and apparatus for removing water from fibrous web using oscillatory flow-reversing air or gas
US20030042272A1 (en) * 2001-05-31 2003-03-06 Guilhem Rousselet Membrane pump and container equipped therewith
WO2003078728A2 (en) * 2002-03-19 2003-09-25 Metso Paper, Inc. Method and equipment for producing driving power in a paper or board mill
US6631566B2 (en) 2000-09-18 2003-10-14 Kimberly-Clark Worldwide, Inc. Method of drying a web
WO2005045130A2 (de) 2003-11-05 2005-05-19 Voith Paper Patent Gmbh Anordnung zur herstellung oder/und behandlung von bahn- oder blattmaterial
WO2005047794A1 (de) * 2003-10-22 2005-05-26 Eisenmann Maschinenbau Gmbh & Co. Kg Anlage und verfahren zum trocknen von gegenständen
US20060101665A1 (en) * 2004-07-19 2006-05-18 Christianne Carin Process and system for drying and heat treating materials
US20060293816A1 (en) * 2005-06-23 2006-12-28 Yunjun Li Series arranged air compressors system
US20080034606A1 (en) * 2006-05-03 2008-02-14 Georgia-Pacific Consumer Products Lp Energy-Efficient Yankee Dryer Hood System
US20080202121A1 (en) * 2005-03-11 2008-08-28 Edmund Nagel Internal Combustion Engine with an Injector as a Compaction Level
US20090255144A1 (en) * 2004-07-19 2009-10-15 Earthrenew, Inc. Process and system for drying and heat treating materials
US7610692B2 (en) 2006-01-18 2009-11-03 Earthrenew, Inc. Systems for prevention of HAP emissions and for efficient drying/dehydration processes
US7694523B2 (en) 2004-07-19 2010-04-13 Earthrenew, Inc. Control system for gas turbine in material treatment unit
US20100199510A1 (en) * 2009-02-09 2010-08-12 Zinovy Plavnik Ultrasonic drying system and method
US20110023323A1 (en) * 2008-06-23 2011-02-03 Prinotec Gmbh Drying system for webs of goods passing through in the form of printed and/or coated paper webs
WO2011073754A1 (en) * 2009-12-18 2011-06-23 Toyota Jidosha Kabushiki Kaisha Drying device
US7966741B2 (en) * 2004-07-19 2011-06-28 Earthrenew, Inc. Process and apparatus for manufacture of fertilizer products from manure and sewage
ITPI20110122A1 (it) * 2011-10-26 2013-04-27 Cartiera Pasquini S R L Impianto di produzione della carta a cogenerazione di energia e metodo di gestione relativo
US9605622B2 (en) 2011-10-21 2017-03-28 Flint Hills Resources, Lp Method and apparatus for supplying heated, pressurized air
US9671166B2 (en) 2014-07-24 2017-06-06 Heat Technologies, Inc. Acoustic-assisted heat and mass transfer device
IT201700007552A1 (it) * 2017-01-24 2018-07-24 Elettromeccanica Ind Lucchese S R L Un innovativo impianto di essiccazione della carta con turbina per la produzione del flusso di aria di asciugatura
US10488108B2 (en) 2014-07-01 2019-11-26 Heat Technologies, Inc. Indirect acoustic drying system and method

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KR20030059195A (ko) * 2000-10-17 2003-07-07 스타링거 운트 콤파니 게젤샤프트 엠 베하 플라스틱 직물 건조 장치 및 방법
EP3170480A1 (en) * 2015-11-18 2017-05-24 The Procter and Gamble Company Apparatus and process for recycling heated gas
CA3092024A1 (en) * 2018-05-01 2019-11-07 Valmet, Inc. Through air drying systems and methods with hot air injection

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US2225166A (en) * 1938-10-06 1940-12-17 Christopher Statter Web drying apparatus
US3004347A (en) * 1958-12-08 1961-10-17 Sun Oil Co Drying of solid materials
US3100376A (en) * 1960-10-10 1963-08-13 Exxon Research Engineering Co Method of cleaning engine exhaust gases
US3187162A (en) * 1962-06-14 1965-06-01 Hitachi Ltd Apparatus for thermally fixing electronically imprinted images
US3346932A (en) * 1965-09-07 1967-10-17 Monsanto Co Methods for relaxing synthetic fiber filaments
US3362080A (en) * 1966-02-14 1968-01-09 Beloit Corp Through drying of paper
US3365562A (en) * 1962-12-17 1968-01-23 Cryodry Corp Apparatus and process for microwave treatment
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US2225166A (en) * 1938-10-06 1940-12-17 Christopher Statter Web drying apparatus
US3004347A (en) * 1958-12-08 1961-10-17 Sun Oil Co Drying of solid materials
US3100376A (en) * 1960-10-10 1963-08-13 Exxon Research Engineering Co Method of cleaning engine exhaust gases
US3187162A (en) * 1962-06-14 1965-06-01 Hitachi Ltd Apparatus for thermally fixing electronically imprinted images
US3365562A (en) * 1962-12-17 1968-01-23 Cryodry Corp Apparatus and process for microwave treatment
US3346932A (en) * 1965-09-07 1967-10-17 Monsanto Co Methods for relaxing synthetic fiber filaments
US3362080A (en) * 1966-02-14 1968-01-09 Beloit Corp Through drying of paper
US3435538A (en) * 1967-03-08 1969-04-01 Lawrence W Hargett Web drying apparatus having multiple hot air nozzles and exhaust outlets

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027391A1 (en) * 1996-12-17 1998-06-25 Ecopower Technology Oy Method and apparatus for producing heated air for different applications of use
US6085437A (en) * 1998-07-01 2000-07-11 The Procter & Gamble Company Water-removing apparatus for papermaking process
US6308436B1 (en) 1998-07-01 2001-10-30 The Procter & Gamble Company Process for removing water from fibrous web using oscillatory flow-reversing air or gas
US6393719B1 (en) 1998-07-01 2002-05-28 The Procter & Gamble Company Process and apparatus for removing water from fibrous web using oscillatory flow-reversing air or gas
US6977028B2 (en) 2000-09-18 2005-12-20 Kimberly-Clark Worldwide, Inc. Method of drying a web
US6631566B2 (en) 2000-09-18 2003-10-14 Kimberly-Clark Worldwide, Inc. Method of drying a web
US20060070259A1 (en) * 2000-09-18 2006-04-06 Ross Russell F Method of drying a web
US20040010935A1 (en) * 2000-09-18 2004-01-22 Ross Russell F. Method of drying a web
US20030042272A1 (en) * 2001-05-31 2003-03-06 Guilhem Rousselet Membrane pump and container equipped therewith
WO2003078728A3 (en) * 2002-03-19 2003-11-27 Metso Paper Inc Method and equipment for producing driving power in a paper or board mill
CN1316120C (zh) * 2002-03-19 2007-05-16 美卓纸业公司 纸机或纸板机中用于产生驱动能的方法和设备
US20050160618A1 (en) * 2002-03-19 2005-07-28 Metso Paper, Inc. Method and equipment for producing driving power in a paper or board mill
WO2003078728A2 (en) * 2002-03-19 2003-09-25 Metso Paper, Inc. Method and equipment for producing driving power in a paper or board mill
US7150111B2 (en) 2002-03-19 2006-12-19 Metso Paper, Inc. Method and equipment for producing driving power in a paper or board mill
CN100445677C (zh) * 2003-10-22 2008-12-24 艾森曼机械制造有限及两合公司 用于干燥物体的设备和方法
WO2005047794A1 (de) * 2003-10-22 2005-05-26 Eisenmann Maschinenbau Gmbh & Co. Kg Anlage und verfahren zum trocknen von gegenständen
US20070101607A1 (en) * 2003-10-22 2007-05-10 Eisenmann Maschinenbau Gmbh & Co. Kg System and method for drying objects
WO2005045130A3 (de) * 2003-11-05 2005-07-07 Voith Paper Patent Gmbh Anordnung zur herstellung oder/und behandlung von bahn- oder blattmaterial
WO2005045130A2 (de) 2003-11-05 2005-05-19 Voith Paper Patent Gmbh Anordnung zur herstellung oder/und behandlung von bahn- oder blattmaterial
US10094616B2 (en) 2004-07-19 2018-10-09 2292055 Ontario Inc. Process and system for drying and heat treating materials
US20060101665A1 (en) * 2004-07-19 2006-05-18 Christianne Carin Process and system for drying and heat treating materials
US20090255144A1 (en) * 2004-07-19 2009-10-15 Earthrenew, Inc. Process and system for drying and heat treating materials
US7882646B2 (en) 2004-07-19 2011-02-08 Earthrenew, Inc. Process and system for drying and heat treating materials
US7685737B2 (en) 2004-07-19 2010-03-30 Earthrenew, Inc. Process and system for drying and heat treating materials
US7694523B2 (en) 2004-07-19 2010-04-13 Earthrenew, Inc. Control system for gas turbine in material treatment unit
US7975398B2 (en) 2004-07-19 2011-07-12 Earthrenew, Inc. Process and system for drying and heat treating materials
US7966741B2 (en) * 2004-07-19 2011-06-28 Earthrenew, Inc. Process and apparatus for manufacture of fertilizer products from manure and sewage
US20080202121A1 (en) * 2005-03-11 2008-08-28 Edmund Nagel Internal Combustion Engine with an Injector as a Compaction Level
US20060293816A1 (en) * 2005-06-23 2006-12-28 Yunjun Li Series arranged air compressors system
US7617031B2 (en) * 2005-06-23 2009-11-10 Gm Global Technology Operations, Inc. Series arranged air compressors system
US7610692B2 (en) 2006-01-18 2009-11-03 Earthrenew, Inc. Systems for prevention of HAP emissions and for efficient drying/dehydration processes
US8156662B2 (en) 2006-01-18 2012-04-17 Earthrenew, Inc. Systems for prevention of HAP emissions and for efficient drying/dehydration processes
US20080034606A1 (en) * 2006-05-03 2008-02-14 Georgia-Pacific Consumer Products Lp Energy-Efficient Yankee Dryer Hood System
US7716850B2 (en) * 2006-05-03 2010-05-18 Georgia-Pacific Consumer Products Lp Energy-efficient yankee dryer hood system
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Also Published As

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CA937045A (en) 1973-11-20
FR2058145A5 (xx) 1971-05-21
DE2038289B2 (de) 1979-09-06
DE2038289A1 (de) 1971-02-25
SE365605B (xx) 1974-03-25
DE2038289C3 (de) 1980-05-08
GB1311364A (en) 1973-03-28

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