WO2001036887A1 - Appareil de lit fluidise - Google Patents

Appareil de lit fluidise Download PDF

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Publication number
WO2001036887A1
WO2001036887A1 PCT/IB2000/001648 IB0001648W WO0136887A1 WO 2001036887 A1 WO2001036887 A1 WO 2001036887A1 IB 0001648 W IB0001648 W IB 0001648W WO 0136887 A1 WO0136887 A1 WO 0136887A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow body
lower section
gas
internal space
particulate
Prior art date
Application number
PCT/IB2000/001648
Other languages
English (en)
Inventor
Michael John Basil Oliver
Original Assignee
Energy Engineering International (Pty) Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Energy Engineering International (Pty) Ltd. filed Critical Energy Engineering International (Pty) Ltd.
Priority to AU11682/01A priority Critical patent/AU1168201A/en
Publication of WO2001036887A1 publication Critical patent/WO2001036887A1/fr

Links

Classifications

    • 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

Definitions

  • THIS I NVENTION relates to a fluidized bed apparatus More particularly, the invention relates to a spouting fluidized bed apparatus
  • Known fluidized bed apparatus have many different applications including the drying of particulate products, the gasification of particulate products, the combustion of particulate products, and the like
  • the present invention provides particularly for a spouting fluidized bed apparatus for drying particulate products
  • Each known spouting fluidized bed apparatus known to the Applicant generally comprises a hollow body that defines an internal space including a downwardly tapering lower section, the hollow body defining a gas inlet opening at its operative lower end which communicates, directly or indirectly, with a gas feed duct
  • the internal space defined by the hollow body includes also an upper section that extends operatively upwardly from the lower section, leading gas to a gas outlet duct that leads from the hollow body and that provides for the passage of gases from the hollow body
  • the apparatus provides also for the feed of particulate products into the internal space defined by the hollow body and for the discharge of particulate products from the hollow body, which can take place in various different modes In operation, for example for drying a particulate product, the particulate product to be dried is fed into the internal space defined by the hollow body of the apparatus via the gas outlet duct, the particles forming the product effectively dropping under gravity into the tapering lower section of the said internal space Heated gas is fed into the internal space defined by the hollow body via a gas feed
  • the particles behave like a fluid insofar as a specific particle level can be detected, this level being controllable and facilitating also the removal of particles from the hollow body of the apparatus via overflow weirs, or the like, in order to be conveyed to a following process stage.
  • a spouting fluidized bed apparatus for drying particulate products which includes
  • a hollow body that defines an internal space including a downwardly tapering lower section, which terminates in a gas inlet opening defined by the hollow body at its operative lower end, and an upper section that extends operatively upwardly from the upper end of the lower section, the hollow body defining a gas outlet leading from a location near the upper end of the upper section of the internal space and a particulate product inlet through which particulate products can be fed into the lower section of the internal space defined by the hollow body;
  • a plenum chamber body that defines a chamber that surrounds at least partially the operative lower part of the hollow body, including the gas inlet opening defined by the hollow body, and that defines a gas inlet opening connectable to a gas supply to permit a gas to enter the chamber and pass from the chamber into the hollow body via the gas inlet opening defined at the operative lower end of the hollow body;
  • a particulate product discharge means for discharging particulate product from the hollow body
  • a heat exchanger arrangement comprising at least one fluid conduit defining an elongate fluid flow path in the tapering lower section of the internal space defined by the hollow body, through which a heated medium can pass to transfer heat from the conduit to particulate product in the said lower section, in use of the apparatus, for enhancing drying of the particulate product.
  • the spouting fluidized bed apparatus as defined above will operate essentially conventionally insofar as a heated gas can pass through the internal space defined by the hollow body to create a fluidized bed of particles to be dried therein, the additional heating of the particles due to their contact with the fluid conduit while a heated medium passes through the conduit, enhancing the effective drying of the particulate product Clearly, the heated gas passing through the internal space defined by the hollow body also will be heated by the exposure thereof to the fluid conduit, which will also enhance the effective drying of the particulate product
  • the lower section of the internal space defined by the hollow body may define an inverted frusto-conical configuration with the gas inlet opening being a circular opening defined at the lower end of the hollow body
  • the lower section of the internal space defined by the hollow body may define a longitudinal axis and a truncated V-shaped profile in cross-section along the length thereof and, as such, the gas inlet opening defined at the lower end of the hollow body defines an elongate slot-like configuration
  • the chamber defined by the plenum chamber body particularly defines a gas flow path therethrough leading from its gas inlet opening to the gas inlet opening defined at the lower end of the hollow body, along which gases can flow and then enter the hollow body with an intensity that will permit a fluidized bed of particles to be generated within the lower section of the internal space defined by the hollow body
  • the configuration of the hollow body and of the plenum chamber body may be essentially conventional, although individual features can be specially designed to accommodate particular applications of the apparatus
  • the particulate product discharge means of the apparatus may be a discharge weir disposed at an elevated level above the operative lower end of the hollow body, over which weir, in use of the apparatus, particulate product in a fluidized state can be discharged .
  • the particulate product discharge means may comprise discharge pipes leading from the hollow body at a location where, in use of the apparatus, particulate product in a fluidized state can be discharged from the hollow body.
  • the fluid conduit forming the heat exchanger arrangement has opposite ends thereof disposed externally of the hollow body, permitting connection to a heated medium flow line for feeding a heated medium through the fluid conduit, with the conduit section of the fluid conduit disposed within the lower section of the internal space defined by the hollow body providing, in use of the apparatus, for heat transfer to particulate products in a fluidized state within the said lower section of the internal space defined by the hollow body.
  • the said conduit section of the fluid conduit located within the hollow body may define an extended flow path within the said lower section of the internal space defined by the hollow body, while the formation of a fluidized bed of particles in the lower section is still permitted, in use of the apparatus.
  • the particulate product inlet for feeding particulate products to be dried into the hollow body may be defined near the operative upper end of the hollow body.
  • the apparatus also may include product feed means for feeding particulate products at a controlled feed rate into the hollow body via the particulate product inlet.
  • the apparatus of the invention also may include a gas displacement means for displacing a heated gas to the chamber defined by the plenum chamber and through the internal space defined by the hollow body.
  • the gas displacement means typically comprises a fan-type gas displacement means.
  • the apparatus particularly includes a continuous gas flow line that incorporates the hollow body, the plenum chamber body and the gas displacement means and that provides for a continuous gas circulation through the flow line.
  • the continuous gas flow line may include, in line therewith, a dust separator for separating impurities within heated gas circulating through the flow line, in use of the apparatus.
  • the dust separator typically is a cyclone-type separator.
  • the apparatus further may include a scrubber apparatus, in line with a branch from the said gas flow line, the scrubber apparatus serving to clean gases guided from the flow line to provide a required gas quality which will permit emission thereof to the atmosphere.
  • a scrubber apparatus in line with a branch from the said gas flow line, the scrubber apparatus serving to clean gases guided from the flow line to provide a required gas quality which will permit emission thereof to the atmosphere.
  • Gases released from the scrubber apparatus may be exposed to thermal oxidation, or the like, to enhance still further the quality of gases emitted to the atmosphere.
  • a spouting fluidized bed apparatus for drying particulate products is designated generally by the reference numeral 10.
  • the apparatus 10 includes a hollow body 1 2 that defines an internal space 13.
  • the space 1 3 defines a longitudinal axis and has a lower section 14 which defines a truncated V-shaped profile in cross section along the length thereof.
  • the internal space 1 3 defined by the hollow body 1 2 further has an upper section 1 6 that extends operatively upwardly from the upper end of the lower section 14 and that leads to a gas outlet 1 8 defined by the hollow body 1 2 at a location near the upper end of the upper section 1 2 of the space 1 3.
  • An inlet 20 for feeding a particulate product into the internal space 1 3 defined by the hollow body 1 2 is provided at the operative top end of the hollow body 1 2, permitting particulate product to drop into the lower section 14 of the space 1 3 defined by the hollow body 1 2.
  • the lower section 1 4 of the space 1 3 defined by the hollow body 1 2 further has a heat exchanger arrangement 22 located therein, the heat exchanger arrangement 22 comprising an elongate fluid conduit 21 defining an elongate fluid flow path within the said lower section 14 of the space 1 3.
  • the fluid conduit 21 defines an extended outer surface area whereby heat can be transferred to particulate product contacting the conduit, during use of the apparatus, for drying the product.
  • the opposite ends of the conduit 21 forming the heat exchanger arrangement 22 are disposed externally of the hollow body 1 2 (as shown), the conduit particularly being connectable in line with a heated medium supply that can feed a heated medium through the conduit, to create a heated outer surface of the conduit section of the conduit disposed within the hollow body 1 2.
  • a boiler 23 may feed steam to the conduit 21 and condensate may be released from the outlet end 25 of the conduit. The condensate clearly can be recycled to the boiler 23.
  • the operative lower end of the hollow body 1 2 defines a gas inlet 24 which is in the form of an elongate slot-like opening, the gas inlet 24 having a tray formation 26 disposed operatively beneath the inlet 24.
  • the tray formation 26 defines side walls 28 that are disposed in a parallel, spaced, overlapping relationship with the walls defining the tapering lower section 14 of the hollow body 1 2, as illustrated .
  • the lower section 14 of the hollow body 1 2 is partially surrounded by a plenum chamber body 30 which is connectable in line with a gas supply line 32.
  • the plenum chamber body 30 provides a flow path for gas entering the chamber defined thereby, to be introduced into the hollow body 1 2 via the inlet 24, having passed through the slot-like openings 34 defined between the walls of the tapering lower section 14 of the hollow body 1 2 and the side walls 28 of the tray formation 26.
  • a predetermined flow path for gas through the hollow body 1 2 thereby is provided for, but insofar as this does not form a part of the present invention, this is not described in further detail herein.
  • the configuration of the conduit forming the heat exchanger arrangement 22 within the lower section 14 of the internal space 13 defined by the hollow body 1 2 must be such that the formation of a fluidized bed is not unduly inhibited, while at the same time providing for the maximum exposed surface area so that a heated medium passing through the heat exchanger can heat particles forming the fluidized bed due to contact with the conduit, to cause additional heating of the particles and thereby to enhance effective drying of the particles for which the apparatus 10 is provided .
  • the heated medium passing through the heat exchanger arrangement 22 also can heat the gas passing through the internal space 1 3 defined by the hollow body 1 2 which induces the formation of the fluidized bed of particles and, thereby, the effective drying of the particles is still further enhanced.
  • heat exchanger arrangement 22 is particularly suitable for use in a spouting fluidized bed apparatus provided for drying particulate products.
  • the apparatus 10 is associated also with an air displacement fan 40 which is disposed in line with a gas flow line leading to the plenum chamber body 30 and leading from the gas outlet 1 8 defined by the hollow body 1 2, a cyclone-type particle filter 42 also being provided in line with this gas flow line to provide for the removal of solid particles passing through this flow line.
  • a scrubber arrangement 44 also is provided, through which gases to be released to the atmosphere must pass, effectively to clean the gases to the extent that the gas quality of the gases to be released, is suitable for emission to the atmosphere Downstream of the scrubber arrangement 44, an arrangement 45 within which thermal oxidation can occur is also provided, particularly to deal with odours and to enhance still further the quality of gases emitted to the atmosphere
  • the apparatus 10 includes also a discharge arrangement (not shown) for discharging dried particulate product from the hollow body 1 2, the discharge line 46 being provided for guiding discharged particulate product to a required destination for further processing

Landscapes

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

Abstract

L'invention concerne un appareil de lit fluidisé par giclage (10) qui comprend un corps creux (12) définissant un espace interne (13) pourvu d'une section inférieure conique s'étendant vers le bas (14) et d'une section supérieure (16) qui s'étend de manière fonctionnelle vers le haut à partir de la section inférieure (14). Le corps creux (12) définit, d'une part, une ouverture d'entrée de gaz (24) au niveau de son extrémité inférieure fonctionnelle qui communique avec un conduit d'alimentation de gaz (32) et, d'autre part, une sortie de gaz (18) qui va du corps creux jusqu'à proximité de son extrémité supérieure fonctionnelle. Un dispositif d'échange thermique (22) comprenant un conduit de fluide allongé (21) est situé à l'intérieur de la section inférieure conique (14) du corps creux (12). Le conduit (21) définit une voie de flux étendue pour un milieu chauffé à l'intérieur de la section inférieure (14) et est ainsi conçu pour le transfert thermique de produit particulaire et de gaz dans la section inférieure pendant l'utilisation de l'appareil, le produit particulaire définissant un lit fluidisé de particules dans ladite section inférieure.
PCT/IB2000/001648 1999-11-15 2000-11-14 Appareil de lit fluidise WO2001036887A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11682/01A AU1168201A (en) 1999-11-15 2000-11-14 A fluidized bed apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA99/7117 1999-11-15
ZA997117 1999-11-15

Publications (1)

Publication Number Publication Date
WO2001036887A1 true WO2001036887A1 (fr) 2001-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2000/001648 WO2001036887A1 (fr) 1999-11-15 2000-11-14 Appareil de lit fluidise

Country Status (2)

Country Link
AU (1) AU1168201A (fr)
WO (1) WO2001036887A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6841515B2 (en) 2001-01-22 2005-01-11 Unified Enviromental Services Group, L.L.C. Production and use of biosolid granules
EP1801088A1 (fr) * 2005-12-19 2007-06-27 VESTOLIT GmbH & Co. KG Méthode d'oxychlorination
EP1933104A1 (fr) * 2006-12-14 2008-06-18 Braunschweigische Maschinenbauanstalt AG Procédé et dispositif destinés au conditionnement de produits en vrac pouvant couler et se fluidifier
US8864868B2 (en) 2005-09-15 2014-10-21 Vitag Corporation Organic containing sludge to fertilizer alkaline conversion process
US8920733B2 (en) 2009-12-30 2014-12-30 Vitag Corporation Bioorganically-augmented high value fertilizer
US8992654B2 (en) 2011-03-28 2015-03-31 Vitag Corporation High value organic-enhanced inorganic fertilizers
US9695092B2 (en) 2006-02-23 2017-07-04 Anuvia Plant Nutrients Corporation Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer
US9856178B2 (en) 2015-06-05 2018-01-02 Anuvia Plant Nutrients Corporation High value organic containing fertilizers and methods of manufacture
US10870609B2 (en) 2018-08-16 2020-12-22 Anuvia Plant Nutrients Corporation Reactive inorganic coatings for agricultural fertilizers
US11999670B2 (en) 2018-11-14 2024-06-04 Profile Products Llc Delivery of bioactive molecules in coatings or surface layers of organically enhanced inorganic fertilizers

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843942A (en) * 1953-12-07 1958-07-22 Phillips Petroleum Co Process for drying wet carbon black pellets
CH519691A (de) * 1970-04-17 1972-02-29 Inst Teplo I Massoobmena Akade Verfahren zum Trocknen von Stoffen in disperser Phase und Anlage zur Durchführung des Verfahrens
US4167819A (en) * 1977-12-05 1979-09-18 The United States Of America As Represented By The United States Department Of Energy Pressure regulator
DE3045134A1 (de) * 1980-01-16 1981-08-27 VEB Schwermaschinenbau Kombinat "Ernst Thälmann" Magdeburg, DDR 3011 Magdeburg Vorrichtung zur strahlschichttrocknung von feststoffen mit gasfoermigen medien
DE3400397A1 (de) * 1983-05-18 1984-11-22 VEB Schwermaschinenbau-Kombinat "Ernst Thälmann" Magdeburg, DDR 3011 Magdeburg Vorrichtung zur strahlschichttrocknung klebrig-koerniger und thermolabiler stoffe
DE3819584A1 (de) * 1987-06-16 1989-01-05 Waagner Biro Ag Verfahren zur trocknung von schuettgutgemischen und wirbelbetttrockner
EP0343407A1 (fr) * 1988-05-11 1989-11-29 Waagner-Biro Aktiengesellschaft Dispositif pour introduire la matière à fluidiser dans un lit fluidisé, en particulier une installation de séchage
EP0537637A1 (fr) * 1991-10-14 1993-04-21 Tsukishima Kikai Kabushiki Kaisha Système de séchage de boue humide
EP0819901A1 (fr) * 1996-07-17 1998-01-21 GEA Wärme- und Umwelttechnik GmbH Installation de séchage de lignite

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843942A (en) * 1953-12-07 1958-07-22 Phillips Petroleum Co Process for drying wet carbon black pellets
CH519691A (de) * 1970-04-17 1972-02-29 Inst Teplo I Massoobmena Akade Verfahren zum Trocknen von Stoffen in disperser Phase und Anlage zur Durchführung des Verfahrens
US4167819A (en) * 1977-12-05 1979-09-18 The United States Of America As Represented By The United States Department Of Energy Pressure regulator
DE3045134A1 (de) * 1980-01-16 1981-08-27 VEB Schwermaschinenbau Kombinat "Ernst Thälmann" Magdeburg, DDR 3011 Magdeburg Vorrichtung zur strahlschichttrocknung von feststoffen mit gasfoermigen medien
DE3400397A1 (de) * 1983-05-18 1984-11-22 VEB Schwermaschinenbau-Kombinat "Ernst Thälmann" Magdeburg, DDR 3011 Magdeburg Vorrichtung zur strahlschichttrocknung klebrig-koerniger und thermolabiler stoffe
DE3819584A1 (de) * 1987-06-16 1989-01-05 Waagner Biro Ag Verfahren zur trocknung von schuettgutgemischen und wirbelbetttrockner
EP0343407A1 (fr) * 1988-05-11 1989-11-29 Waagner-Biro Aktiengesellschaft Dispositif pour introduire la matière à fluidiser dans un lit fluidisé, en particulier une installation de séchage
EP0537637A1 (fr) * 1991-10-14 1993-04-21 Tsukishima Kikai Kabushiki Kaisha Système de séchage de boue humide
EP0819901A1 (fr) * 1996-07-17 1998-01-21 GEA Wärme- und Umwelttechnik GmbH Installation de séchage de lignite

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6841515B2 (en) 2001-01-22 2005-01-11 Unified Enviromental Services Group, L.L.C. Production and use of biosolid granules
US9233882B2 (en) 2005-09-15 2016-01-12 Anuvia Plant Nutrients Corporation Organic containing sludge to fertilizer alkaline conversion process
US8864868B2 (en) 2005-09-15 2014-10-21 Vitag Corporation Organic containing sludge to fertilizer alkaline conversion process
EP1801088A1 (fr) * 2005-12-19 2007-06-27 VESTOLIT GmbH & Co. KG Méthode d'oxychlorination
US9695092B2 (en) 2006-02-23 2017-07-04 Anuvia Plant Nutrients Corporation Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer
EP1933104A1 (fr) * 2006-12-14 2008-06-18 Braunschweigische Maschinenbauanstalt AG Procédé et dispositif destinés au conditionnement de produits en vrac pouvant couler et se fluidifier
US8920733B2 (en) 2009-12-30 2014-12-30 Vitag Corporation Bioorganically-augmented high value fertilizer
US9328030B2 (en) 2009-12-30 2016-05-03 Anuvia Plant Nutrients Corporation Bioorganically-augmented high value fertilizer
US9586869B1 (en) 2009-12-30 2017-03-07 Anuvia Plant Nutrients Corporation Bioorganically-augmented high value fertilizer
US8992654B2 (en) 2011-03-28 2015-03-31 Vitag Corporation High value organic-enhanced inorganic fertilizers
US9856178B2 (en) 2015-06-05 2018-01-02 Anuvia Plant Nutrients Corporation High value organic containing fertilizers and methods of manufacture
US10870609B2 (en) 2018-08-16 2020-12-22 Anuvia Plant Nutrients Corporation Reactive inorganic coatings for agricultural fertilizers
US11542213B2 (en) 2018-08-16 2023-01-03 Anuvia Plant Nutrients IP Holdings, LLC Reactive inorganic coatings for agricultural fertilizers
US11999670B2 (en) 2018-11-14 2024-06-04 Profile Products Llc Delivery of bioactive molecules in coatings or surface layers of organically enhanced inorganic fertilizers

Also Published As

Publication number Publication date
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