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EP0190106A2 - Séchoir agricole à chauffage direct - Google Patents

Séchoir agricole à chauffage direct Download PDF

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Publication number
EP0190106A2
EP0190106A2 EP86830019A EP86830019A EP0190106A2 EP 0190106 A2 EP0190106 A2 EP 0190106A2 EP 86830019 A EP86830019 A EP 86830019A EP 86830019 A EP86830019 A EP 86830019A EP 0190106 A2 EP0190106 A2 EP 0190106A2
Authority
EP
European Patent Office
Prior art keywords
air
fan
drier
heating chamber
firing
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.)
Granted
Application number
EP86830019A
Other languages
German (de)
English (en)
Other versions
EP0190106B1 (fr
EP0190106A3 (en
Inventor
Francesco Forestan
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.)
ARMAFOR S.R.L.
Original Assignee
ARMAFOR Srl
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 ARMAFOR Srl filed Critical ARMAFOR Srl
Priority to AT86830019T priority Critical patent/ATE53252T1/de
Publication of EP0190106A2 publication Critical patent/EP0190106A2/fr
Publication of EP0190106A3 publication Critical patent/EP0190106A3/en
Application granted granted Critical
Publication of EP0190106B1 publication Critical patent/EP0190106B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F26B9/08—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers including agitating devices, e.g. pneumatic recirculation arrangements
    • F26B9/082—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers including agitating devices, e.g. pneumatic recirculation arrangements mechanically agitating or recirculating the material being dried
    • F26B9/085—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers including agitating devices, e.g. pneumatic recirculation arrangements mechanically agitating or recirculating the material being dried moving the material in a substantially vertical sense using conveyors or agitators, e.g. screws or augers with vertical axis, which are positioned inside the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B19/00—Machines or apparatus for drying solid materials or objects not covered by groups F26B9/00 - F26B17/00
    • F26B19/005—Self-contained mobile devices, e.g. for agricultural produce
    • 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
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/10—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof
    • F26B9/103—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof using fixed or removable drying air channels placed in the stack, e.g. horizontally or vertically

Definitions

  • Subject of the present invention is a direct-firing agricultural drier of a type comprising a drying chamber adapted to contain a product to be dried, means for dispensing air into said drying chamber, and a hot air generator having an air heating chamber with a feed conduit for the air to be heated and a conduit for delivering hot air to said dispensing means, a furnace within said heating chamber, a liquid fuel . burner connected to said furnace, and a fan for force feeding air into said dispensing means through said heating chamber.
  • direct-firing refers, in an agricultural drier to that the related hot air generator is designed such that the hot flue gases-enter the drying chamber admixed to the heated air; that is to say the furnace is open to the air heating chamber.
  • the drier of the aforesaid type is widely employed in agriculture to reduce the relative moisture content of freshly harvested products in order to improve the preservability thereof.
  • direct-firing agricultural drier are equipped with a hot air generator whose fan is located downstream (with reference to the air flow direction through the heating chamber) of the burner/furnace assembly.
  • the fans employed are mostly of the axial flow type.
  • the feed air to the fan has a high thermal content. This involves a a number of non-negligible problems both in the design and operation of the drier.
  • That deteriorated performance of the fan reflects, in the majority of cases, in a decreased overall performance of the drrer.
  • a second problem resides in the high rate of wear of the fan impeller bearings due to their high operating temperature, of the impeller itself especially where this is of the centrifugal type, due to the occurrence of hot deformation, and of the motor members driving the fan.
  • the problem underlying the present invention is that of providing a direct-firing agricultural drier which is operated on liquid fuel and so conceived, construction- and function-wise, as to overcome all the problems encountered with the cited prior art.
  • the solutive idea to the above problem is that of mounting the hot air generator upstream of the air heating chamber and of so pressurizing the burner as to enable its installation externally of said heating chamber.
  • a direct-firing agricultural drier as indicated, which is characterized in that said fan has a delivery port connected to the feed conduit of the air to be heated, and that said burner is mounted externally of said chamber and has a combustion air intake in fluid communication with said delivery port.
  • Figure 1 Depicted in Figure 1 is a direct-firing agricultural drier of the wheel-mounted kind, comprehensively designated 1.
  • the drier 1 comprises, on a dolly 2, a vertical axis cylindrical silo 3 having at the bottom a hopper 4 which tapers down into a well 5, an auger elevator 6 drawing from the well 5 and extending coaxially with the silo 3, a perforated drum 8 supported inside the silo 3 coaxially therewith, and a hot air generator 10 mounted in fluid communication with the drum 8.
  • the silo 3 and drum 8 are constructed of perforated sheet metal, and defined in the space therebetween is a drying chamber 12 intended for accommodating a product to be dried, usually a granulate matter.
  • the drum 8 has the function of dispensing hot air through the drying chamber 12 to thereby prompt removal of moisture from the product loaded therein.
  • the hot air generator 10 comprises a centrifugal fan 15 of the dual intake type, i.e. having two intake ports indicated at 16a and 16b, respectively, and a delivery port 17.
  • the fan 15 is supported on the dolly 2 and driven by motor means not shown, such as the power take-off of an agricultural tractor.
  • the delivery port 17 is connected to a heating chamber 19 through a feed conduit .20 for the, air to be heated.
  • a delivery conduit 21 extending between the chamber 19 and the drum 8 supplies hot air under pressure to the dispensing means.
  • the furnace 22 has an end 24 open toward the conduit 21 and provided with a baffle plate 25.
  • the hot air generator 10 further comprises a burner 27 mounted on the exterior of the chamber 19 and connected to the furnace 22 through a nosepiece 28.
  • the burner 27 incorporates a fan 30 for the force feed of combustion air into the furnace 22 through the nosepiece 28 and is liquid fuel operated with fuel, such as oil, picked up from a tank not shown.
  • the fan 30 has a combustion air intake 32 which is connected, through a bypass conduit 31 and the chamber 19, to the delivery port 17 of the fan 15.
  • the drier 1 operates as follows:t h e product to be dried, such as cereal grains, is loaded into the chamber 12 and recirculated through said chamber upwardly through the conveyor 6.
  • the hot air generator 10 is started. Air is drawn in for heating through the intakes 16a,16b of the fan 15 and conveyed under pressure into the heating chamber 19.
  • Some of the air compressed by the fan 15 is utilized to pressurize the burner 27 through the conduit 31, and the remainder is circulated in turbulent flow through the chamber 19 to remove heat from the furnace 22.
  • This arrangement affords the possibility of keeping the outer shroud of the chamber 19 at near ambient temperature.
  • the air forced in by the fan 15 and the hot flue gases issuing from the furnace 22 through the end 24 mix together and are dispensed into the drum 8 interior as a blend.
  • the hot drying air that is, the mix of air being introduced by the fan and flue gases, is dispersed homogeneously through the produce being dried and flows out through the perforated walls of the silo 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Fertilizers (AREA)
EP86830019A 1985-01-25 1986-01-22 Séchoir agricole à chauffage direct Expired - Lifetime EP0190106B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86830019T ATE53252T1 (de) 1985-01-25 1986-01-22 Landwirtschaftlicher trockner mit direkter heizung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19225/85A IT1183301B (it) 1985-01-25 1985-01-25 Essiccatoio agricolo a fuoco diretto
IT1922585 1985-01-25

Publications (3)

Publication Number Publication Date
EP0190106A2 true EP0190106A2 (fr) 1986-08-06
EP0190106A3 EP0190106A3 (en) 1988-05-11
EP0190106B1 EP0190106B1 (fr) 1990-05-30

Family

ID=11155926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86830019A Expired - Lifetime EP0190106B1 (fr) 1985-01-25 1986-01-22 Séchoir agricole à chauffage direct

Country Status (4)

Country Link
EP (1) EP0190106B1 (fr)
AT (1) ATE53252T1 (fr)
DE (1) DE3671661D1 (fr)
IT (1) IT1183301B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2587465A1 (fr) * 1985-09-19 1987-03-20 Pedrotti Srl F Lli Sechoir a cereales equipe d'un generateur d'air chaud a combustible liquide
WO2003008887A2 (fr) * 2001-07-18 2003-01-30 Agrex S.P.A. Sechoir pour cereales et matieres en grains en general
EP2362171A3 (fr) * 2010-02-18 2013-07-31 Kiener, Christoph Procédé et moyen de séchage de substances humides et contenant de la biomasse
IT201700053106A1 (it) * 2017-05-16 2018-11-16 Agrex Spa Gruppo scambiatore di calore, gruppo generatore di calore e apparecchiatura per l´essicazione di prodotti sfusi

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2240905B2 (de) * 1972-08-19 1975-08-14 Gebr. Claas Maschinenfabrik Gmbh, 4834 Harsewinkel Trocknungsanlage für landwirtschaftliche Zwecke mit einem mit flüssigem Brennstoff betriebenen Brenner
DE2037480B2 (de) * 1970-07-29 1977-05-18 Böhler-Zenkner GmbH & Co KG Strömungstechnik, 4005 Meerbusch Vorrichtung zum erzeugen eines trocknungs-luftstromes z.b. fuer konvektionstrockner
EP0068733A2 (fr) * 1981-06-19 1983-01-05 Christianus Marinus Theresia Westelaken Appareil pour le chauffage de l'air

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2037480B2 (de) * 1970-07-29 1977-05-18 Böhler-Zenkner GmbH & Co KG Strömungstechnik, 4005 Meerbusch Vorrichtung zum erzeugen eines trocknungs-luftstromes z.b. fuer konvektionstrockner
DE2240905B2 (de) * 1972-08-19 1975-08-14 Gebr. Claas Maschinenfabrik Gmbh, 4834 Harsewinkel Trocknungsanlage für landwirtschaftliche Zwecke mit einem mit flüssigem Brennstoff betriebenen Brenner
EP0068733A2 (fr) * 1981-06-19 1983-01-05 Christianus Marinus Theresia Westelaken Appareil pour le chauffage de l'air

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2587465A1 (fr) * 1985-09-19 1987-03-20 Pedrotti Srl F Lli Sechoir a cereales equipe d'un generateur d'air chaud a combustible liquide
WO2003008887A2 (fr) * 2001-07-18 2003-01-30 Agrex S.P.A. Sechoir pour cereales et matieres en grains en general
WO2003008887A3 (fr) * 2001-07-18 2003-09-04 Agrex Spa Sechoir pour cereales et matieres en grains en general
EP2362171A3 (fr) * 2010-02-18 2013-07-31 Kiener, Christoph Procédé et moyen de séchage de substances humides et contenant de la biomasse
IT201700053106A1 (it) * 2017-05-16 2018-11-16 Agrex Spa Gruppo scambiatore di calore, gruppo generatore di calore e apparecchiatura per l´essicazione di prodotti sfusi
WO2018211423A1 (fr) * 2017-05-16 2018-11-22 Agrex Spa Échangeur de chaleur, générateur de chaleur et équipement pour sécher des produits en vrac

Also Published As

Publication number Publication date
IT1183301B (it) 1987-10-22
EP0190106B1 (fr) 1990-05-30
IT8519225A0 (it) 1985-01-25
EP0190106A3 (en) 1988-05-11
ATE53252T1 (de) 1990-06-15
DE3671661D1 (de) 1990-07-05

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