US20070101607A1 - System and method for drying objects - Google Patents

System and method for drying objects Download PDF

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Publication number
US20070101607A1
US20070101607A1 US10/576,986 US57698604A US2007101607A1 US 20070101607 A1 US20070101607 A1 US 20070101607A1 US 57698604 A US57698604 A US 57698604A US 2007101607 A1 US2007101607 A1 US 2007101607A1
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US
United States
Prior art keywords
fuel cell
high temperature
electrical
drying
temperature fuel
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.)
Abandoned
Application number
US10/576,986
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English (en)
Inventor
Apostolos Katefidis
Michael Hager
Werner Swoboda
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.)
Eisenmann Anlagenbau GmbH and Co KG
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Eisenmann Anlagenbau GmbH and Co KG
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 Eisenmann Anlagenbau GmbH and Co KG filed Critical Eisenmann Anlagenbau GmbH and Co KG
Assigned to EISENMANN MASCHINENBAU GMBH & CO. KG reassignment EISENMANN MASCHINENBAU GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAGER, MICHAEL, KATEFIDIS, APOSTOLOS, SWOBODA, WERNER
Publication of US20070101607A1 publication Critical patent/US20070101607A1/en
Assigned to EISENMANN ANLAGENBAU GMBH & CO. KG reassignment EISENMANN ANLAGENBAU GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EISENMANN MASCHINENBAU GMBH & CO. KG
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying goods
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • the invention relates to a system for drying objects, comprising
  • thermal post-combustion devices are used as the heating device for the drying air. These thermal post-combustion devices contribute to energy saving in so far as they extract by combustion the energy content of the air containing hydrocarbon drawn from the drying cubicle, while simultaneously purifying this air.
  • the energy content of the waste air from the drying cubicle is insufficient for attaining the combustion temperature required for complete purification.
  • the waste air stream from the drier to be disposed of must therefore be heated to a temperature necessary for the complete oxidation of the organic components contained in said waste drying air. Suitable fuels must be added for this purpose.
  • the hot air leaving the thermal post-combustion devices is now supplied to one or more heat exchangers, which transfer a part of their heat energy to the air circulating in the drying cubicle. Direct introduction of the combustion air from the thermal post-combustion device into the drying cubicle is to be avoided because of foreign matter still present or produced in the waste air, which may impair the quality of the paint surface, and because of inferior temperature control.
  • the air leaving the thermal post-combustion device and cooled in the heat exchangers is then conducted to the flue at a temperature which does not differ very widely from the temperature prevailing inside the drying cubicle. A value of 160° C. is typical.
  • this known concept for operating high temperature fuel cells is reversed: for use in driers the fuel cell is regarded primarily as a heating device which supplies thermal energy for heating the drying air.
  • the high temperature fuel cell is therefore operated according to the amount of thermal energy required in the drying cubicle. It is initially immaterial how much electrical energy is necessarily also obtained in this process. For this electrical energy the principle now applies that consumers to which this electrical energy can be supplied will always be found. This is the more easily the case because electrical energy is a higher-value energy form more versatile in its applications than thermal energy.
  • the control system uses the electrical energy from the high temperature fuel cell primarily for electrical consumers belonging to the system itself and secondarily for electrical consumers located outside the system. In this way the system is largely self-sufficient with regard to electrical energy. Because the requirement for thermal energy in driers can be very high, in many cases more electrical energy is generated than the consumers in the system itself can absorb. Only this surplus energy is then supplied to consumers outside the system.
  • the electrical energy of the high temperature fuel cell is used primarily for the electrical consumers used for generating heat, for example infrared radiators, and only secondarily for other electrical consumers, for example electrical drives.
  • the high temperature fuel cell is regarded as a source of thermal energy. To the extent that a surplus of electrical energy is present, it can be used for heating the objects to be dried, which in turn reduces the requirement for heated air. The fuel cell may then be operated with a lower total output if the most self-sufficient possible operation of the whole system is sought.
  • surplus electrical energy still remains after feeding of the electrical consumers of the system used for generating heat, this surplus electrical energy is used as far as possible for electrical drives within the system itself, for example, the motors of fans or conveying devices.
  • the surplus energy supplied in an advantageous embodiment of the system according to the invention, primarily to an energy accumulator and secondarily to the general electrical mains supply.
  • energy accumulators both a storage battery and an electrolysis device for producing hydrogen are possible.
  • the energy accumulators also increase the self-sufficiency of the plant, since energy can be drawn from them in phases in which the electrical and/or thermal output of the high temperature fuel cell is insufficient.
  • thermal post-combustion devices are used, as already mentioned, to obtain the considerable quantities of energy required and at the same time to purify the waste air from the drier.
  • a regenerative post-combustion device may be provided for purifying the air containing hydrocarbon which leaves the drying cubicle.
  • the regenerative post-combustion device carries out the purification process with lower energy consumption than a thermal post-combustion device. The surplus thermal energy thus made available is not sufficient for operating the drier.
  • a heat exchanger in which a thermal exchange takes place between the hot air extracted from the regenerative post-combustion device and the air drawn from the ambient atmosphere and fed to the drying cubicle.
  • this heat exchanger therefore, further heat is extracted from the gas leaving the regenerative post-combustion device and now having only a low temperature, and supplied for utilisation within the drying cubicle.
  • the process waste air of the high temperature fuel cell may directly form the inert atmosphere. It is inherently sufficiently clean and, especially when natural gas is used as the fuel gas, consists almost entirely of carbon dioxide, which plays an important part in the curing of UV paints
  • FIG. 1 is a schematic representation of a system for drying vehicle bodies
  • FIG. 2 shows in somewhat more detail a high temperature fuel cell contained in the system of FIG. 1 , and its immediate environment;
  • FIG. 3 shows a second embodiment of a system according to the invention.
  • the system for drying vehicle bodies shown in the drawings comprises as central components the actual drying cubicle 1 , which is subdivided by a partition 2 into a pre-heating zone the 3 and a main drying zone 4 .
  • the freshly-painted vehicle bodies are first introduced by means of a conveying system (not shown) into the pre-heating zone 3 , where they are heated to a temperature of somewhat below 100° C. through the combined effect of hot air introduced via a line 5 and electrically energised infrared radiators 6 . As this happens the major part of the solvent is expelled.
  • the air, with a high solvent content, is extracted from the drying cubicle via a line 7 and supplied to a post-treatment described below.
  • the vehicle bodies pre-heated in this way then enter the main drying zone 4 , which in turn may be subdivided into a heating and a holding zone.
  • the greater length of the main drying zone 4 in comparison to the pre-heating zone 3 indicates that the vehicle bodies remain in the main drying zone 4 longer than in the pre-heating zone 3 .
  • these different treatment times are reflected in different plant lengths.
  • the vehicle bodies are heated to a temperature of 180° C., on the one hand with hot air, which is also supplied via the line 5 and, on the other, with process waste air which is fed via lines 8 .
  • the hot air inside the main drying section 4 is circulated by means of fans 9 for uniform heating. At the temperature referred to the remaining solvents are removed from the paint on the vehicle bodies; the paint is fully cured.
  • one or more high temperature fuel cells 10 are used.
  • Such high temperature fuel cells 10 may be operated with practically all fuel gases containing hydrocarbon, in particular natural gas or biogas, sewage gas, refuse dump gas or other residual industrial gases, such as are also obtained in painting technology.
  • the fuel gas is fed to the high temperature fuel cells 10 via the line 21 .
  • the fuel cell 10 it is heated to operating temperature by means of an electrical heating device 22 (see FIG. 2 ).
  • the heating device 22 is fed with externally-generated current and after reaching of the operating temperature is operated with current generated by the high temperature fuel cell 10 itself. This is because a surplus of electrical energy is generally present, whereas the thermal energy of the high temperature fuel cell 10 must be fed as completely as possible to the drying cubicle 1 .
  • the air required for combustion is supplied via a line 23 connected to the ambient atmosphere, in which line 23 a controllable flap 24 is located.
  • a temperature of approximately 650° C. is present.
  • Process waste air is produced and leaves the high temperature fuel cell 10 at a temperature of approximately 600° C.
  • This process waste air is practically free of impurities, so that it can be fed directly into the drying cubicle 1 via the lines 8 without the interposition of a heat exchanger.
  • the inert atmosphere required for this process may be formed directly from the process waste air, by far the predominant part of which consists of carbon dioxide, in particular when natural gas is used as the fuel gas.
  • the waste air with high solvent content leaving the drying cubicle 1 via the line 7 is supplied first to a regenerative post-combustion device 11 in which the organic impurities are burnt and the waste air is thus purified.
  • This purified air having a temperature of approximately 230° C., is fed by means of a fan 12 to a flue 13 either directly or via a heat exchanger 14 .
  • the hot purified air dissipates a proportion of its heat to atmospheric air at approximately 20° C. which is sucked in by means of a further fan 15 , forced through the heat exchanger 14 and is then introduced into the drying cubicle 1 at a temperature of approximately 180° C.
  • the line 5 leads further to a controllable flap 25 and into the line 24 between the flap 24 and the high temperature fuel cell 10 .
  • the quantity and temperature of the air fed to the high temperature fuel cell 10 can be determined by adjusting the flaps 24 and 25 .
  • the primary control value is the quantity of thermal energy required in the main drying zone 4 .
  • the fuel cell 10 is so operated that the required thermal energy is generated and the corresponding quantities of heated waste air can be fed into the main drying zone 4 via the lines 8 .
  • the electrical energy obtained at the same time is disregarded. With this electrical energy the following procedure is adopted: the electrical consumers of the system itself used for obtaining heat, in particular the infrared radiators 6 and the electrical heating device 22 , are first supplied via the line 18 . Surplus electrical energy is fed via the lines 17 to fans 12 , 15 present within the system. With conventional drier systems there still remains surplus electrical energy, with which electrical drives, for example of the conveyor transporting the vehicle bodies, are supplied via the line 19 . If electrical energy still remains, it is either discharged into the electrical mains network via the line 20 or temporarily stored, for example in the form of electrolytic hydrogen generation.
  • the embodiment of a drier system shown in FIG. 3 differs from that described above with reference to FIGS. 1 and 2 only in that no post-combustion device and no heat exchanger connected downstream thereof, which transfers heat from the air leaving the regenerative post-combustion device to the air drawn from the ambient atmosphere, is provided. Instead, the line 5 leads via a controllable flap 28 into the line 26 which leads to the flue 13 ; the line 27 through which fresh air is drawn in also contains a controllable flap 29 and leads into the line 5 between the fan 15 and the line 26 . As is apparent, the quantity and temperature of the air supplied to the drying cubicle 1 can be determined using the flaps 28 and 29 .

Landscapes

  • 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)
  • Drying Of Solid Materials (AREA)
  • Fuel Cell (AREA)
US10/576,986 2003-10-22 2004-10-02 System and method for drying objects Abandoned US20070101607A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10349090.6 2003-10-22
DE10349090A DE10349090A1 (de) 2003-10-22 2003-10-22 Anlage und Verfahren zum Trocknen von Gegenständen
PCT/EP2004/011036 WO2005047794A1 (de) 2003-10-22 2004-10-02 Anlage und verfahren zum trocknen von gegenständen

Publications (1)

Publication Number Publication Date
US20070101607A1 true US20070101607A1 (en) 2007-05-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/576,986 Abandoned US20070101607A1 (en) 2003-10-22 2004-10-02 System and method for drying objects

Country Status (10)

Country Link
US (1) US20070101607A1 (de)
EP (1) EP1676082B1 (de)
JP (1) JP4773357B2 (de)
KR (1) KR101124787B1 (de)
CN (1) CN100445677C (de)
AT (1) ATE520941T1 (de)
CA (1) CA2542463A1 (de)
DE (1) DE10349090A1 (de)
ES (1) ES2371466T3 (de)
WO (1) WO2005047794A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102398303A (zh) * 2010-09-07 2012-04-04 北新集团建材股份有限公司 一种石膏板生产线
WO2012082208A1 (en) * 2010-12-15 2012-06-21 The Boeing Company Water harvesting system
US20130014406A1 (en) * 2010-01-26 2013-01-17 Juergen Weschke Drying System having a Thermal Engine
WO2018194949A1 (en) * 2017-04-17 2018-10-25 O'rourke Research Group, Inc. High efficiency washer-dryer system
CN114061274A (zh) * 2021-10-22 2022-02-18 佛山市瑞丰恒业机械有限公司 一种烘炉自动节能控制系统

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AT503757B1 (de) * 2006-05-22 2008-06-15 Dirk Peter Dipl Ing Claassen Verfahren zur nutzung von hochtemperaturbrennstoffzellen um haushaltsgeräte zu betreiben
JP5323333B2 (ja) * 2007-08-28 2013-10-23 本田技研工業株式会社 燃料電池システム及びその運転方法
JP5298041B2 (ja) * 2010-02-03 2013-09-25 株式会社カワタ 乾燥装置および不活性ガス置換方法
RU2489657C1 (ru) * 2012-01-11 2013-08-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Саратовский государственный технический университет имени Гагарина Ю.А." (СГТУ имени Гагарина Ю.А.) Сушилка для сыпучих термочувствительных материалов
CN103868342B (zh) * 2014-02-15 2016-02-10 马军 无气味散发干燥装置
JP6425574B2 (ja) * 2015-02-09 2018-11-21 トリニティ工業株式会社 塗装設備
DE102019004484A1 (de) 2019-06-27 2020-12-31 Wenker Gmbh & Co. Kg Modulares Kammertrocknersystem
DE102020201095A1 (de) * 2020-01-30 2021-08-05 Robert Bosch Gesellschaft mit beschränkter Haftung Einsatz von Festoxidbrennstoffzellen bei Prozesswärmegenerierung
CN112944860A (zh) * 2021-02-09 2021-06-11 嘉兴知途信息咨询有限公司 一种面料烘干方法
JP2022127218A (ja) * 2021-02-19 2022-08-31 和光テクノサービス株式会社 乾燥機
DE102022203217A1 (de) * 2022-03-31 2023-10-05 K&L Automation-Systems GmbH Verfahren und Vorrichtung zur Trocknung von oberflächenbeschichteten Werkteilen

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US5983521A (en) * 1997-10-10 1999-11-16 Beloit Technologies, Inc. Process for splitting recycled combustion gases in a drying system
US20020112479A1 (en) * 2001-01-09 2002-08-22 Keefer Bowie G. Power plant with energy recovery from fuel storage
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US3668785A (en) * 1969-08-18 1972-06-13 Dominian Eng Works Ltd Integrated drying processes and apparatus
US4233914A (en) * 1978-10-02 1980-11-18 Wellons, Inc. Pressurized waste wood furnace system
US4656758A (en) * 1984-08-20 1987-04-14 Mazda Motor Corporation Paint drying furnace
US5697167A (en) * 1994-11-24 1997-12-16 W. Kunz Drytec Ag Method for drying a substance, in particular wood shavings
US5983521A (en) * 1997-10-10 1999-11-16 Beloit Technologies, Inc. Process for splitting recycled combustion gases in a drying system
US6541141B1 (en) * 2000-06-13 2003-04-01 Hydrogenics Corporation Water recovery in the anode side of a proton exchange membrane fuel cell
US20020112479A1 (en) * 2001-01-09 2002-08-22 Keefer Bowie G. Power plant with energy recovery from fuel storage
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130014406A1 (en) * 2010-01-26 2013-01-17 Juergen Weschke Drying System having a Thermal Engine
US9228781B2 (en) * 2010-01-26 2016-01-05 Duerr Systems Gmbh Drying system having a thermal engine
CN102398303A (zh) * 2010-09-07 2012-04-04 北新集团建材股份有限公司 一种石膏板生产线
WO2012082208A1 (en) * 2010-12-15 2012-06-21 The Boeing Company Water harvesting system
US9088018B2 (en) 2010-12-15 2015-07-21 The Boeing Company Water harvesting system
WO2018194949A1 (en) * 2017-04-17 2018-10-25 O'rourke Research Group, Inc. High efficiency washer-dryer system
CN114061274A (zh) * 2021-10-22 2022-02-18 佛山市瑞丰恒业机械有限公司 一种烘炉自动节能控制系统

Also Published As

Publication number Publication date
CN1871486A (zh) 2006-11-29
CN100445677C (zh) 2008-12-24
WO2005047794A1 (de) 2005-05-26
ATE520941T1 (de) 2011-09-15
CA2542463A1 (en) 2005-05-26
KR101124787B1 (ko) 2012-03-27
KR20060073639A (ko) 2006-06-28
EP1676082A1 (de) 2006-07-05
JP2007510120A (ja) 2007-04-19
EP1676082B1 (de) 2011-08-17
JP4773357B2 (ja) 2011-09-14
DE10349090A1 (de) 2005-06-16
ES2371466T3 (es) 2012-01-03

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