EP0051008B2 - Verfahren zum trägen verzögerten, ununterbrochenen Kühlen vonGetreide - Google Patents

Verfahren zum trägen verzögerten, ununterbrochenen Kühlen vonGetreide Download PDF

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Publication number
EP0051008B2
EP0051008B2 EP81401565A EP81401565A EP0051008B2 EP 0051008 B2 EP0051008 B2 EP 0051008B2 EP 81401565 A EP81401565 A EP 81401565A EP 81401565 A EP81401565 A EP 81401565A EP 0051008 B2 EP0051008 B2 EP 0051008B2
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EP
European Patent Office
Prior art keywords
grain
column
air
silo
drying
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.)
Expired
Application number
EP81401565A
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English (en)
French (fr)
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EP0051008A1 (de
EP0051008B1 (de
Inventor
Gérard Book
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.)
Secemia - Europeenne De Constructions Electro-Mecaniques Industrielles Et Agricoles SA Ste
Original Assignee
Secemia - Europeenne De Constructions Electro-Mecaniques Industrielles Et Agricoles SA Ste
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9246708&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0051008(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Secemia - Europeenne De Constructions Electro-Mecaniques Industrielles Et Agricoles SA Ste filed Critical Secemia - Europeenne De Constructions Electro-Mecaniques Industrielles Et Agricoles SA Ste
Priority to AT81401565T priority Critical patent/ATE4840T1/de
Publication of EP0051008A1 publication Critical patent/EP0051008A1/de
Application granted granted Critical
Publication of EP0051008B1 publication Critical patent/EP0051008B1/de
Publication of EP0051008B2 publication Critical patent/EP0051008B2/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
    • 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
    • F26B3/14—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 materials or objects to be dried being moved by gravity
    • F26B3/16—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 materials or objects to be dried being moved by gravity in a counter-flow of the gas or vapour

Definitions

  • the present invention relates to a method for the delayed slow cooling of the grain continuously.
  • this method has a number of drawbacks. Indeed, it requires the use of several silos equipped with a delayed slow cooling system to follow the functional rhythm of a continuous dryer. In addition, the control of the operation must be rigorous to respect the necessary phases, which requires the training of specialized personnel who must also pay particular attention to the work.
  • the object of the invention is to remedy the drawbacks of the known method.
  • the invention is materialized, for this purpose, in a slow delayed cooling process of the grain still hot and still charged with excess moisture taken from a dryer, consisting, continuously, in ensuring the gradual descent of this grain to the interior of at least one column, first in non-ventilated conditions, then after a descent time corresponding to the time necessary to dry the internal moisture of the grain, to ensure the ventilation of this grain to complete drying and cooling while said grain continues its downward progression inside the column, and taking the dried and cooled grain from the column.
  • the general known method of delayed slow cooling is implemented continuously during the progression of the grain in the same column, avoiding the drawbacks resulting from the storage capacity required according to the prior art.
  • the grain is subjected to a very precise treatment sequence, which differs from that of a dryer in that no heating of the grain occurs for drying and that this grain is subjected simply to a time of rest or drying, then to a cooling ventilation.
  • This process combines the advantages resulting from the removal from a drier of a grain which is not yet dried to the required degree and still hot, with the gain in throughput and the reduction in energy consumption associated therewith, and those resulting from drying. more complete and longer grain, with the advantages of continuous treatment in a device with a significantly reduced size compared to existing installations.
  • the grain is ensured during its progression in the column by the passage of air against the current with respect to the direction of progress. grain. It is thus possible, according to the invention, to admit air in the vicinity of the point of exit of the grain relative to the column, that is to say at the place where the grain is already sufficiently cooled, which avoids the thermal shock of the grain, by preventing cracks.
  • the pressure of the grain is ventilated, ensuring the admission of cold air in the vicinity of the point of exit of the grain relative to the column and the evacuation of the air at a level intermediate of this column, chosen according to the drying time required.
  • This energy recovery can be done in any desired way, for example by means of a heat exchanger, with condensation of the humidity contained in the air.
  • Yet another advantage of the process according to the invention lies in the fact that the homogeneity of the dried grain is improved as a result of its regular and continuous progression in the column. It then establishes between the grains of contact changes compared to neighboring grains, which promotes exchanges with air and consequently increases the efficiency of ventilation.
  • FIGs. 1 and 2 there is shown in Figs. 1 and 2 an embodiment of a slow delayed cooling installation of the grain continuously.
  • This installation comprises a silo generally designated by the reference 1, having a modular construction and providing chambers or columns 2 for cooling the grain.
  • This silo is combined at its upper part with a grain feed device, indicated diagrammatically at 3 in FIGS. 1 and 2, capable of bringing grain to the silo from a grain dryer for example.
  • a grain feed device indicated diagrammatically at 3 in FIGS. 1 and 2
  • Cold air supply and distribution ducts indicated in 4 are provided towards the base of the silo, which will be described in more detail below and which ensure uniform air distribution throughout the base of the silo. These ducts 4 are supplied from fans 5.
  • a system of ducts 7 forming an air collector which intercepts and evacuates towards the outside at 6 (Fig. 2) the drying and cooling air having penetrated into the silo by sheaths 4.
  • FIGS. 3 and 4 There is shown in more detail in FIGS. 3 and 4 the lower part of the silo, with the air intake means.
  • FIGs. 3 and 4 show a module generally designated by 8, with its support posts 9 and four cones directed downward for the outlet of the grain, the outlet orifices being indicated at 10a.
  • the central part of the module is formed by the air inlet sheath 4, which constitutes a beam supporting the weight of the grain which is in the silo.
  • Side parts 11 also constituting support beams complete the modular structure of the base of this silo.
  • the upper part of the central sheath 4 has the shape of a roof, and there are provided towards the top of this part air outlet orifices, 12.
  • This part provided with orifices 12 is covered with a cap 13 supported at a certain distance from the sheath 4 so that, as indicated by arrows in particular in FIG. 4, the air passing through this sheath 4 and exiting through the orifices 12 is deflected by the cap 13 to go up inside the grain substantially at the right of the flow orifices 10a of the discharge cones of the module.
  • the sheath 4 ensuring the routing of air in a module communicates with the sheath 4 of the next module after the assembly of the modules, by rectangular orifices formed in the end flanks of the base, visible at 14 in FIG. . 2. This communication appears in FIG. 1.
  • this structure supports the grain, avoiding a conventional beam with I and H profiles. It also allows simultaneous extraction by multi-cones in the entire horizontal cross section of the silo, a manner ensuring a descent of the grain in horizontal layers, which subjects all the fractions of the grain to a uniform slow cooling. Finally, by the ducts and caps described, it constitutes a ventilation and air injection network in the grain, with a direct distribution from one module to another.
  • each orifice 10a of an extraction cone 10 is extended downwards by a tube 15 to which another tube 16 is connected with the interposition of a flexible and watertight seal 17 which allows the deformations while preventing leaks d 'air.
  • This tube 16 is in turn connected by a versatile connector 18 to a first sheath 19 in which is mounted a conveyor screw rotating at low speed.
  • the speed of rotation of this screw is regulated by a variable speed drive which can, for example, be of the mechanical or electronic type, which makes possible a precise metering of the extraction of the grain.
  • a variable speed drive which can, for example, be of the mechanical or electronic type, which makes possible a precise metering of the extraction of the grain.
  • This arrangement of the extraction and evacuation system makes it possible to obtain a low overall height and it can be supported by bases as indicated at 22 in FIG. 5. This low height results in an appreciable gain in the cost of the posts and bracing irons are avoided because of the embedding of the side doors over the entire height of the bases.
  • a two-screw extraction system of this type constitutes a substantially sealed extractor, which maintains the seal during extraction.
  • Figs. 1 and 2 the grain embankment coming from a dryer and brought in by the feed device 3 is indicated at 23.
  • the silo is filled with grain over its entire height. It is easily understood that there is produced by the cones 10 and tubes 15, 16, at the base of the silo, a sample of a certain amount of grain, depending on the speed of the screws. The mass of the grain then undergoes a gradual downward movement in the silo in horizontal layers. The screw speed can be adjusted according to the required residence time of the grain in the silo.
  • the fans 5 send the entire base of the silo, via the ducts 4, cold air ensuring the cooling and the end of the drying of the grain.
  • This air which enters the base of the silo rises inside the grain mass and is intercepted and evacuated to the outside by the duct system 7 located at an intermediate level.
  • the grain in the upper part of the silo, the grain is not subjected to the effect of drying air. It therefore undergoes during its entire downward progression in the upper part of the silo a drying effect of internal humidity, similar to that obtained during its rest in a cell.
  • a drying effect of internal humidity similar to that obtained during its rest in a cell.
  • a tube 30 is connected to the base of the orifice 10a of the cone 10, this tube being here in two parts with the interposition of a flexible seal 24.
  • This tube 23 is extended downwards by a nozzle 25 connecting to a lock body 26.
  • An outlet nozzle 27 starting from this lock body 26 joins the sheath 28 of a collecting screw.
  • a rotary lock of known type is mounted in the lock body 26. It is rotated by a shaft 29 whose speed is adjusted as a function of the output flow of the grain and consequently of the residence time of the grain in the silo .
  • the means for removing the grain could be constituted by valves, pneumatic with register, which can be controlled all together or one after the other according to an opening rhythm determined here again as a function of the required residence time. for the grain inside the silo.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Water Treatment By Sorption (AREA)

Claims (4)

1. Verfahren zum trägen verzögerten Kühlen von noch warmem und noch mit Überschussfeuchtigkeit beladenem Getreide, das einem Trockner entnommen wird, dadurch gekennzeichnet, dass gemäss eines kontinuierlichen Prozesses, man lässt das Getreide im Innern mindestens einer Säule zunächst ohne Belüftung herabgleiten, nach einer der für das Austrocknen oder Ausschwitzen der inneren Feuchtigkeit des Getreides erforderlichen entsprechenden Zeit das Getreide zur Vervollständigung der Trocknung und zu Kühlung belüftet wird, während das Getreide sich im Innern der Säule weiter nach unten bewegt, und das getrocknete und gekühlte Getreide der Säule entnommen wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Belüftung des Getreides während seiner Fortbewegung in der Säule im Gegenstrom zu seiner Fortbewegungsrichtung erfolgt.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Belüftung des Getreides durch Einleiten kühler Luft in die Säule in der Nähe des Austrittspunktes des Getreides und durch Abziehen der Luft bei einem Zwischenniveau der Säule erfolgt, welches Zwischenniveau in Abhängigkeit der für die Trocknung erforderlichen Zeit gewählt wird.
4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die in der aus der Säule abgezogenen Luft enthaltene Wärmeenergie wiedergewonnen wird.
EP81401565A 1980-10-09 1981-10-09 Verfahren zum trägen verzögerten, ununterbrochenen Kühlen vonGetreide Expired EP0051008B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81401565T ATE4840T1 (de) 1980-10-09 1981-10-09 Verfahren und vorrichtung zum traegen verzoegerten, ununterbrochenen kuehlen von getreide.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8021590 1980-10-09
FR8021590A FR2491723A1 (fr) 1980-10-09 1980-10-09 Procede et installation pour le refroidissement lent differe du grain en continu

Publications (3)

Publication Number Publication Date
EP0051008A1 EP0051008A1 (de) 1982-05-05
EP0051008B1 EP0051008B1 (de) 1983-09-28
EP0051008B2 true EP0051008B2 (de) 1988-03-30

Family

ID=9246708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401565A Expired EP0051008B2 (de) 1980-10-09 1981-10-09 Verfahren zum trägen verzögerten, ununterbrochenen Kühlen vonGetreide

Country Status (7)

Country Link
US (1) US4446630A (de)
EP (1) EP0051008B2 (de)
AT (1) ATE4840T1 (de)
BR (1) BR8106511A (de)
CA (1) CA1170419A (de)
DE (1) DE3161043D1 (de)
FR (1) FR2491723A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605851B1 (fr) * 1986-11-05 1989-01-06 Secemia Procede et installation de traitement du grain sortant d'un sechoir, par refroidissement lent et extraction complementaire d'humidite
DE3639966A1 (de) * 1986-11-22 1988-06-01 Bergwerksverband Gmbh Wirbelschichtreaktor aus edelstahlgussgehaeuse
FR2705442B1 (fr) * 1993-05-13 1995-07-21 Calmon Olivier Dispositif de séchage en continu pour produits divisés en vrac.
US6202319B1 (en) * 2000-01-13 2001-03-20 Douglas Bening Grain dryer heat exchanger
US7568297B2 (en) * 2006-04-10 2009-08-04 Woodhaven Capital Corp. Grain drying aeration system
CN103628724B (zh) * 2013-12-04 2016-06-22 河南工业大学 一种旋转抛物面形的地下粮仓
US9950872B2 (en) 2015-11-30 2018-04-24 Superior Manufacturing LLC Bin sweep auger unplugging system
CN111377155A (zh) * 2020-04-03 2020-07-07 罗连巧 一种农业用谷物储存装置
US11304424B2 (en) 2020-09-18 2022-04-19 LAW Iberica S.A. Method and apparatus to process grain process grain received from a dryer
US11644237B2 (en) 2020-09-18 2023-05-09 LAW Iberica S.A. Apparatus to process grain received from a dryer

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US921395A (en) * 1908-01-28 1909-05-11 Hager Mfg Company Grain-cooler.
GB256500A (en) * 1925-09-11 1926-08-12 Albin Klingler Improvements in air distributing systems for drying kilns and the like
US1932830A (en) * 1927-09-03 1933-10-31 Koppers Co Inc Apparatus for heating coal or the like
FR821091A (fr) * 1937-01-30 1937-11-26 Thomas Robinson & Son Ltd Perfectionnements aux machines de séchage et de conditionnement pour céréales
FR912848A (fr) * 1944-03-21 1946-08-21 Gebru Der Bu Hler Sécheur à cuve
GB647490A (en) * 1945-07-19 1950-12-13 Erie Mining Co Heat-treating solids
US2560141A (en) * 1948-06-21 1951-07-10 James F Tipps Means for cooling and drying grain and seed
US3302297A (en) * 1964-09-09 1967-02-07 Douglas L Graham Drying apparatus and method
US3710449A (en) * 1971-01-06 1973-01-16 Gear Co M W Grain dryer with improved grain deflector
US3721017A (en) * 1971-05-10 1973-03-20 L Niems Apparatus for cooling particles
US3701203A (en) * 1971-11-22 1972-10-31 Andersons The Particulate material drying apparatus
US4020561A (en) * 1975-12-17 1977-05-03 Mathews B C Method and apparatus for drying grain
IT1087727B (it) * 1976-10-05 1985-06-04 Westlake Agricultural Eng Dispositivo dosatore di controllo della portata per essiccatoi di materiali granulari a flusso per caduta

Also Published As

Publication number Publication date
CA1170419A (en) 1984-07-10
US4446630A (en) 1984-05-08
EP0051008A1 (de) 1982-05-05
DE3161043D1 (en) 1983-11-03
FR2491723A1 (fr) 1982-04-16
ATE4840T1 (de) 1983-10-15
FR2491723B1 (de) 1984-11-09
EP0051008B1 (de) 1983-09-28
BR8106511A (pt) 1982-06-29

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