WO2012117145A1 - Procédé et appareil pour le séchage de matière humide - Google Patents

Procédé et appareil pour le séchage de matière humide Download PDF

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Publication number
WO2012117145A1
WO2012117145A1 PCT/FI2011/050171 FI2011050171W WO2012117145A1 WO 2012117145 A1 WO2012117145 A1 WO 2012117145A1 FI 2011050171 W FI2011050171 W FI 2011050171W WO 2012117145 A1 WO2012117145 A1 WO 2012117145A1
Authority
WO
WIPO (PCT)
Prior art keywords
preheater
exhaust gas
drier
pipes
gas
Prior art date
Application number
PCT/FI2011/050171
Other languages
English (en)
Inventor
Hannu Mansikkaviita
Ilpo Tapio KYLMÄKORPI
Jyri Juhani TALJA
Original Assignee
Kumera Oy
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 Kumera Oy filed Critical Kumera Oy
Priority to PCT/FI2011/050171 priority Critical patent/WO2012117145A1/fr
Publication of WO2012117145A1 publication Critical patent/WO2012117145A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/084—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed with heat exchange taking place in the fluidised bed, e.g. combined direct and indirect heat exchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a method as defined in the preamble ;i of claim 1. Further, the invention relates to an apparatus as defined in the preamble of claim 13.
  • Such driers are typically continuously operated steam driers, in the interior of which there is a steam pipework 1 co-rotating with the drier and through which a flow o : f the material to be dried is passed.
  • a steam drier comprises a substantially horizontal elongated drum to ;be rotated about its longitudinal axis.
  • the steam pipework is provided in the interior of the drum and combined to the drum to co-rotate with the drum.
  • the steam pipework is fed with water vapor, whereupon the material to be dried is provided in heat transfer communication with the steam pipework as the drum ro- tates for evaporating the water included in the material, and the material is dried in the drum as it advances from a first end to a second end.
  • the steam drier is fed with moist material from the first end of the steam drier, and carrier gas is simultaneously conveyed to the interior of the drum.
  • the dried material and hot and moist exhaust gas are discharged from the second end of the steam drier.
  • the exhaust gas contains: carrier gas and water vapor evaporated from the material. Solid particles are separated from the moist exhaust gas by a dust separator, and the exhaust gas is then released into the atmosphere.
  • the material to be dried is an ore concentrate stored in the open air, it may typically include approximately 5 to 15% of water which is heated to above 100°C in the steam drier, and the concentrate is heated to a temperature- of 100°C to 140°C.
  • the exhaust gas discharged from the steam drier has a water vapor content of approximately 30 to 60% of the total amount of the exhaust gas, the rest being carrier gas and other gaseous compounds evaporated from the concentrate .
  • driers based on direct heat transfer occurring from the combustion gases of a fuel to be burnt in a drying chamber to the material to : be dried, in which case the combustion gases also partially function as carrier gas.
  • the total amount of exhaust gas is greater and its water vapor content is lower than in a steam drier.
  • the problem is that the energy content of the exhaust gas from the drier has not been utilized in any way in the prior art, and thus a significant portion of the total amount of energy to be used for drying has been lost with the exhaust gas.
  • a further problem is that the material to be fed to the drier at the ambient temperature immediately condenses more moisture onto its surface as it enters the drier at: the inlet end. As this happens in the case of a rotating steam drier, the material becomes lumpy and sticks to the surface of the steam pipework, not moving in the interior of the drum by rolling as it should; instead, it sticks to the pipework as the drum rotates, rising up and crashing all down in lumps, hindering the functioning of the device and subjecting the device to mechanical stresses.
  • the objective of the invention is to eliminate the drawbacks referred to above.
  • the method according to the invention is characterized by what has been presented in claim 1.
  • the apparatus according to the invention is characterized by what has been presented in claim 13.
  • the material prior to feeding the material to the drier it is preheated in the method to an elevated: temperature in a preheater based on recuperative indirect heat transfer, wherein the material is preheated by the latent energy released in a phase transition from the vapor phase to the aqueous phase of the water vapor included by the exhaust gas.
  • the apparatus includes a preheater based on recuperative indirect heat transfer for preheating the moist material to be fed to the drier to ; an elevated temperature by the latent energy released in a phase transition from the vapor phase to the aqueous phase of the water vapor included in the exhaust gas.
  • the advantage of the invention is that the latent energy of ; the water vapor from the exhaust gas, which has not been utilized before, can be effectively utilized to preheat the material to be dried, by virtue of which the energy requirement of the drying is reduced for up to 20% and considerable cost savings can thus be reached. Further, it is an advantage of the invention that the material to be dried which is preheated from the ambient temperature to an elevated temperature does not bind additional moisture to its surface as it enters the drier, so its mechanical movement properties in the interior of the drying drum are improved. The warm material does not have any lumping tendency.
  • the method and apparatus is suita- ble for drying any material, whether the material be inorganic or organic. As examples of some of the preferred applications, the drying of minerals, oil sand, slurry, wood-based material and mixed municipal waste can be mentioned.
  • a preheater having a substantially vertical casing, in the interior of which there are a number of pipes which are substantially vertical or inclined relative to the vertical direction and spaced apart from each other so that a space is, delimited in the interior of the casing of the chamber around the pipes for the purpose of receiving the exhaust gas.
  • the material to be preheated is conveyed to the pipes.
  • Exhaust gas is conveyed to the space surrounding the pipes so that the water vapor of the exhaust gas is condensed to the external surface of the pipes, imparting its phase transition energy to the material passing in the interior of the pipes.
  • the material to be pre- heated is introduced onto a fluidized bed at the bottom part of the preheater, from which the material is fluidized from the bottom to the top of the pipes by means of a fluidizing gas.
  • the preheated material is discharged from the ⁇ top part of the preheater and conveyed to the drier.
  • the material to be preheated is introduced to the top part of the preheater, from which the material moves down in the pipes mainly by means of gravity, and the preheated material is discharged from the bottom part of the preheater and conveyed to the drier.
  • the temperature of the exhaust gas is kept above the dew point prior to the preheater.
  • the moist material is heated to a temperature of approximately 40 to 90°C in the preheater.
  • the moist material contains approximately 5 to 30% of water. In one embodiment of the method, the exhaust gas has a water vapor content greater than 10%.
  • the warm exhaust gas from which water has been condensed out is discharged from the preheater.
  • Part of this exhaust gas is con- veyed to the steam drier as a carrier gas and/or to the preheater as a fluidizing gas.
  • part of the exhaust gas from which water has been condensed out and which is discharged from the preheater is directed to the bottom part of the preheater.
  • dust is separated from the exhaust gas by a dust separator prior to directing it to the preheater.
  • the preheater includes a : casing which is substantially vertical or slightly . inclined relative to the vertical direction, and a number of pipes provided in the interior of the casing in parallel to and spaced apart from each other so that a heat transfer space to which the exhaust gas can be Conveyed is delimited in the interior of the chamber around the pipes, the moist material to be preheated being adapted to move in the interior of said pipes for preheating the material by the latent energy released in a phase transition of the exhaust gas provided in the exterior of the pipes.
  • the preheater includes a top wall which delimits the heat transfer space in the upward direction, and to which the top ends of the pipes are attached in a gas tight manner. Further, the preheater includes a bottom wall which delimits the heat transfer space in the downward direction, and to which the bottom ends of the pipes are attached in a gas and water tight manner. In one embodiment of the apparatus, the preheater includes an inlet chamber at the first end of the preheat- ⁇ er for receiving the material to be preheated and transferring it to the pipes. Further, the preheater includes an outlet chamber at the second end of the preheater for receiving the preheated material from the pipes and transferring it further to the drier.
  • the inlet chamber is disposed below the bottom wall and the outlet chamber is disposed above the top wall.
  • the preheater includes a fluidized bed spaced apart from the bottom wall below the bottom wall, forming the base of the inlet chamber to which the material to be preheated can be in- troduced.: Further, the preheater includes a gas distribution chamber disposed below the fluidized bed for distributing a fluidizing gas to the fluidized bed for fluidizing the material from the inlet chamber at the bottom to the outlet chamber at the top.
  • the inlet chamber is disposed above the top wall and the outlet chamber is disposed below the bottom wall.
  • the bottom wall is horizontal or disposed in an inclined position relative to the horizontal direction.
  • the preheater includes an exhaust duct opening to the heat transfer space in the immediate vicinity of the bottom wall for discharging . any condensed water accumulated onto the bottom wall.
  • the apparatus includes a ; feeding device for feeding the material to the inlet chamber.
  • the apparatus includes a dust separator, such as a bag filter, for removing dust from the exhaust gas to be conveyed to the preheater.
  • the apparatus includes a blower for raising the pressure of the exhaust gas to be conveyed to the preheater.
  • the apparatus includes a heating device for raising the temperature of the exhaust gas to be conveyed to the preheater.
  • the apparatus includes a first gas duct for conveying part of the exhaust gas to be discharged from the preheater to the drier as ; a carrier gas .
  • the apparatus in- eludes a second gas duct for conveying part of the exhaust gas to be discharged from the preheater to the gas distribution chamber as a fluidizing gas.
  • the apparatus in- eludes a: third gas duct for conveying part of the exhaust gas to be discharged from the preheater to the outlet chamber.
  • the drier is a steam drier with an elongated rotatable drum as the drying chamber.
  • the steam drier includes a steam pipework provided in the interior of the drum and combined with the drum to co-rotate with the drum.
  • the steam pipework can be fed with water vapor, whereupon the mate- rial to be dried is provided in heat transfer communi- cation with the steam pipework as the drum rotates for evaporating the water included in the material.
  • FIG. 1 schematically illustrates a first embodiment of the apparatus according to the invention by which one embodiment of the method according to the invention can be carried out
  • Fig. 2 illustrates section II-II of Fig. 1, and
  • FIG. 3 schematically illustrates a second embodiment of the apparatus according to the invention by which a second embodiment of the method according to the in- vention can be carried out.
  • Fig. 1 and 3 schematically illustrate an apparatus for drying moist material.
  • the material to be dried may include minerals, oil sand, wood-based material, such as dust : and wood bark slurry, or mixed municipal waste.
  • the apparatus can be added to a larger process line to constitute a part of it, whether the process be a smelting process, a biogasification process or any other process.
  • the apparatus firstly includes, mainly in the flow direction of the moist material 1, a preheater 9 from which the preheated moist material is passed to a dry- ing chamber 15 of a steam drier 2, wherein the moist material; is dried.
  • the drying chamber of the steam drier 2 is an elongat- ed rotatable drum 15.
  • the interior of the drum 15 is provided with a steam pipework 3 combined with the drum to co-rotate with the drum.
  • the steam pipework 3 can be fed with water vapor, so that the water is removed from the moist material by evaporation as the drum 15 rotates and the material 1 to be dried is provided in heat transfer communication with the steam pipework 3.
  • a first end 4 of the drum is provided with an inlet connection 16 via which the interior of the drum 15 can be fed with the moist material .1 and a carrier gas 5.
  • a second end of the drum 15 is provided with an exhaust chamber 17 receiving the dried material 7 from the drum : as well as the exhaust gas 8 including carri- er gas 5 and hot water vapor evaporated from the moist material.
  • the moist material to be fed to the steam drier 2 has a water content of 5 to 20%, in which case the exhaust gas 8 will have a water vapor content of 10 to 60%, and its tem- perature is kept above the dew point.
  • the dried material 7 is passed for further treatment by a conveyor.
  • the exhaust gas 8 is conveyed to a filter 14, wherein dust is separated from the exhaust gas.
  • the dust separated at the filter 14 is conveyed with the dried material 7 to a next process step.
  • the purified exhaust gas 8 is con- veyed to the preheater 9.
  • the exhaust gas can be pressurized by a blower 26 and/or heated by a heating device 27 as needed.
  • the purified moist and hot exhaust gas 8 is utilized to preheat the moist material 1 to be fed to the steam drier 2 at the preheater 9 based on recuperative indirect heat transfer.
  • the moist material 1 is preheated to an elevated temperature by the latent energy released in a phase transition from the vapor phase to the aqueous phase of the water vapor included in the exhaust gas 8.
  • the preheater 9 includes a casing 10 which is substantially vertical or slightly inclined relative to the vertical direction.
  • the casing 10 may be cylindrical (as in Fig. 2) or shaped as a prism.
  • the preheater 9 further includes a number of elongated pipes 11 provided in the interior of the casing in parallel to and spaced apart from each other so that a heat transfer space 18 to which the exhaust gas 8 can be conveyed is delimited in the interior of the casing 10 around the pipes 11, the moist material 1 to be preheated being adapted to move in the interior of the pipes 11 for heating the mate- rial by the latent energy released in a phase transition of the exhaust gas 8 present in the exterior of the pipes.
  • the preheater includes a top wall 19 which delimits the heat : transfer space 18 in the upward direction and to which; the top ends of the pipes 11 are attached in a gas tight manner, and a bottom wall 20 which delimits the heat transfer space in the downward direction and to which the bottom ends of the pipes are attached in a gas and water tight manner.
  • the preheater 9 includes an inlet chamber 21 at the bottom end of the preheater for receiving the material 1 to be preheated and transferring it to the pipes 11, and an outlet chamber 22 at the top end of the preheater for receiving the preheated material from the pipes and transferring it further to the steam drier 2.
  • the inlet chamber 21 is thus disposed below the bottom wall 20 and the outlet chamber 22 is disposed above the top wall 19.
  • the pre- heater 9 includes a fluidized bed 12 spaced apart from the bottom wall 20 below the bottom wall, constituting the base of the inlet chamber 21 onto which the material 1 to be preheated can be introduced by a feeding device 25 illustrated herein as a screw conveyor. Be- low the fluidized bed 12 there is a gas distribution chamber 23 for distributing a fluidizing gas 13 onto the fluidized bed for fluidizing the material from the inlet chamber 21 at the bottom to the outlet chamber 22 at the top.
  • the embodiment of Fig. 3 differs from the example of Fig. 1 in that the flow direction of the material 1 in the preheater 9 is oriented from the top to the bottom, in which case the flow of the material 1 in the pipes 11 is mainly gravitational.
  • the inlet chamber 21 is disposed above the top wall 19 and the outlet chamber 22 is disposed below the bottom wall 20.
  • the residence time of the material in the preheater can be adjusted based on a level detector 30 detecting the level of the material 1 in the inlet chamber 21.
  • a signal obtained from the level detector can be used to control a first rotary feeder 31 adjusting the amount of the material flow discharged from the ; outlet chamber 22 to the steam drier 2.
  • a first rotary feeder 31 adjusting the amount of the material flow discharged from the ; outlet chamber 22 to the steam drier 2.
  • the feeding device 25 feeding the material 1 to the inlet chamber 21 is a second rotary feeder 32.
  • the inlet chamber 21 and/or the outlet chamber 22 can also be pressurized for enhancing -the flow of the material 1 and for opening any possible blockages.
  • the bottom wall 20 may be disposed in an inclined position relative to the horizontal direction.
  • the preheater includes an exhaust duct 24 opening into the heat trans- fer space 18 in the immediate vicinity of the bottom wall 20 for discharging the condensed water accumulated onto the bottom wall.
  • the apparatus of Fig. 1 includes a first gas duct 28 for conveying the exhaust gas to be discharged from the preheater 9 into the steam drier 2 as a carrier gas 5, and additionally a second gas duct 29 for conveying the exhaust gas to be discharged from the preheater 9 into the gas distribution chamber 23 as a fluidizing gas 13.
  • the apparatus of Fig. 3 has a first gas duct 28 for conveying part of the exhaust gas to be discharged from the preheater 9 into the steam drier 2 as a car- rier gas 5.
  • a third gas duct 33 is provided for conveying part of the exhaust gas to be discharged from the preheater 9 to the outlet chamber 22 of the preheater to aid the flow of the material.
  • the apparatus of Fig. 1 and 3 can be used to carry out a method, wherein a steam drier 2 is rotated and continuously fed with moist material 1 to the steam drier 2 from a first end 4.
  • Carrier gas 5 is conveyed to the steam drier 2.
  • Water vapor is conveyed via a steam pipework 3, whereupon the heat is transferred from the water vapor included in the steam pipework through in- direct heat transfer by being conducted through the wall of the steam pipework to the material so that the water present in the material is evaporated to water vapor.
  • Dried material 7 is discharged from a second end 6 of the steam drier, as well as exhaust gas 8 including carrier gas 5 and water vapor. The temperature of the exhaust gas 8 is kept above the dew point.
  • the exhaust gas 8 and the dried material 7 are separated from each other in an exhaust chamber 17.
  • the material Prior to feeding the material 1 to the steam drier 2, the material is preheated to an elevated temperature in a preheater 9 based on recuperative indirect heat transfer, wherein the latent energy of a phase transi- tion from the vapor phase to the aqueous phase of the water vapor included in the exhaust gas 8 is transferred to the preheating of the moist material 1.
  • This takes place in such a way as to introduce the material 1 to be preheated to a fluidized bed 12 at the bottom part of the preheater 9, from which the material is fluidized from the bottom to the top in pipes 11 by means of a fluidizing gas 13.
  • Exhaust gas 8 is conveyed to a heat transfer space 18 surrounding the pipes 11 so that the water vapor of the exhaust gas 8 is condensed to the outer surface of the pipes 11, imparting ts phase transition energy to the material 1 which passes in the interior of the pipes and which is heated to a temperature of approximately 40 to 90°C.
  • the preheated material 1 is discharged from the top part of ; the preheater and conveyed to the steam drier 2-
  • the material 1 to be preheated is introduced to the top part of the preheater 9, from which the material moves down in the pipes 11 mainly by means of gravity, and the preheated material 1 is discharged from the bottom part of the preheater and conveyed to the steam drier 2.
  • At least part of the warm exhaust gas 8 from which wa- ter has been condensed out and which is discharged from the preheater 9 can be conveyed to the steam drier 2 as a carrier gas 5 by a first gas duct 28. Additionally in the embodiment of Fig. 1, part of the exhaust gas discharged from the preheater can be con- veyed to the preheater 9 as a fluidizing gas 13 by a second gas duct 29. Further in the embodiment of Fig. 3, part of the exhaust gas discharged from the preheater can be conveyed to the exhaust chamber 22 by a third gas duct 33.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention porte sur un procédé et un appareil pour le séchage de matière humide (1), l'appareil comprenant un sécheur (2). Avant l'introduction de la matière (1) dans le sécheur (2), la matière est préchauffée à une température élevée dans un préchauffeur (9) basé sur le transfert de chaleur indirect par récupération, l'énergie latente libérée dans une transition de phase de la phase vapeur vers la phase aqueuse de la vapeur d'eau comprise dans le gaz sortant (8) étant transférée vers le préchauffage de la matière humide.
PCT/FI2011/050171 2011-02-28 2011-02-28 Procédé et appareil pour le séchage de matière humide WO2012117145A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2011/050171 WO2012117145A1 (fr) 2011-02-28 2011-02-28 Procédé et appareil pour le séchage de matière humide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2011/050171 WO2012117145A1 (fr) 2011-02-28 2011-02-28 Procédé et appareil pour le séchage de matière humide

Publications (1)

Publication Number Publication Date
WO2012117145A1 true WO2012117145A1 (fr) 2012-09-07

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PCT/FI2011/050171 WO2012117145A1 (fr) 2011-02-28 2011-02-28 Procédé et appareil pour le séchage de matière humide

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115477A (zh) * 2012-11-23 2013-05-22 华南再生资源（中山）有限公司 自动卸料多级干燥装置
PL423062A1 (pl) * 2017-10-04 2019-04-08 Przedsiębiorstwo Modernizacji Obiektów Przemysłowych Cema Spółka Akcyjna Układ do rekuperacji ciepła w suszarni surowców mineralnych
CN114886136A (zh) * 2022-05-25 2022-08-12 龙岩烟草工业有限责任公司 滚筒类叶片回潮机预热方法、装置和计算机设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058634A (en) * 1975-04-01 1977-11-15 W. Kunz Ag Method for drying agricultural feed materials, pulp-like materials
FI105130B (fi) * 1998-04-17 2000-06-15 Kumera Corp Höyrykuivain
KR20100113947A (ko) * 2009-04-14 2010-10-22 한국에너지기술연구원 건조로의 배출가스를 이용하여 슬러지를 예열하는 저에너지 건조시스템

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058634A (en) * 1975-04-01 1977-11-15 W. Kunz Ag Method for drying agricultural feed materials, pulp-like materials
FI105130B (fi) * 1998-04-17 2000-06-15 Kumera Corp Höyrykuivain
KR20100113947A (ko) * 2009-04-14 2010-10-22 한국에너지기술연구원 건조로의 배출가스를 이용하여 슬러지를 예열하는 저에너지 건조시스템

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115477A (zh) * 2012-11-23 2013-05-22 华南再生资源（中山）有限公司 自动卸料多级干燥装置
CN103115477B (zh) * 2012-11-23 2015-04-22 华南再生资源（中山）有限公司 自动卸料多级干燥装置
PL423062A1 (pl) * 2017-10-04 2019-04-08 Przedsiębiorstwo Modernizacji Obiektów Przemysłowych Cema Spółka Akcyjna Układ do rekuperacji ciepła w suszarni surowców mineralnych
CN114886136A (zh) * 2022-05-25 2022-08-12 龙岩烟草工业有限责任公司 滚筒类叶片回潮机预热方法、装置和计算机设备
CN114886136B (zh) * 2022-05-25 2023-09-05 龙岩烟草工业有限责任公司 滚筒类叶片回潮机预热方法、装置和计算机设备

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