EP0051008A1 - Verfahren zum trägen verzögerten, ununterbrochenen Kühlen vonGetreide - Google Patents

Verfahren zum trägen verzögerten, ununterbrochenen Kühlen vonGetreide Download PDF

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Publication number
EP0051008A1
EP0051008A1 EP81401565A EP81401565A EP0051008A1 EP 0051008 A1 EP0051008 A1 EP 0051008A1 EP 81401565 A EP81401565 A EP 81401565A EP 81401565 A EP81401565 A EP 81401565A EP 0051008 A1 EP0051008 A1 EP 0051008A1
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EP
European Patent Office
Prior art keywords
grain
column
silo
air
base
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
EP81401565A
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English (en)
French (fr)
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EP0051008B1 (de
EP0051008B2 (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
SECEMIA
Original Assignee
Secemia - Europeenne De Constructions Electro-Mecaniques Industrielles Et Agricoles SA Ste
SECEMIA
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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(A1) "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, SECEMIA 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
Publication of EP0051008B1 publication Critical patent/EP0051008B1/de
Application granted granted Critical
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

  • this method however has a certain 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 in ensuring the gradual descent of this grain inside at least a column, first in non-ventilated conditions, then after a descent time corresponding to the time necessary for drying the internal moisture of the grain, to ensure the ventilation of this grain to complete drying and cooling while said grain continues its progression downward inside the column, and taking the dried and cooled grain from the column, intermittently or continuously.
  • 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 a period of rest or drying, then 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 of much smaller dimensions compared to existing installations.
  • the grain is ventilated during its progression through the column by the passage of air against the current with respect to the direction of grain progression. 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, reducing cracks.
  • ventilation of the grain is carried out under pressure, ensuring the admission of cold air to the vicinity of the point of exit of the grain relative to the column and the evacuation of the air at an intermediate level 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. Changes in contact are then established between the grains with respect to the neighboring grains, which promotes exchanges with the air and consequently increases the efficiency of ventilation.
  • the invention also relates to an installation for implementing this process, characterized in that it comprises at least one vertical column through which the grain passes, means for ensuring the admission of the still hot grain coming from a dryer in the upper part of this column in order to keep it always filled, means provided at the base of the column for ensuring the extraction of the dried and cooled grain, means for the admission of cold ventilation air to the base of the said column, and means for the outlet of this ventilation air at an intermediate level over the height of the column, so that the grain undergoes in this column a displacement in principle continuous towards the bottom, with all of first a drying of the humidity in the upper part of the column, then a ventilation completing its drying and cooling in the lower part of this column.
  • the delayed slow cooling column of the grain is constituted by a cooling silo of modular structure.
  • This silo can then be supplied with grain from one or more driers, means being provided to keep it constantly filled.
  • Such a multi-cone system ensures this extraction in a regular principle in the whole of the straight section of the silo and consequently a descent of the grain in it by horizontal layers.
  • the means ensuring the extraction of the grain at the base of the column may include pneumatically or other hatches, programmed in an appropriate manner, or else devices such as conveyor screws.
  • This screw can itself be connected to a high-speed collecting screw which ensures the evacuation of the grain downstream of the installation, for example for its storage.
  • a tube starting from the base of each cone can lead directly into the sheath of an evacuation conveyor screw, with the interposition of a lock, a damper or similar device associated with flow regulation means to control the evacuation flow of the grain by this tube.
  • the combination of two screws to form the extractor system constitutes a substantially sealed assembly, which ensures that the seal is maintained during extraction.
  • each module is profiled so as to provide a sheath for passage and distribution of the cold air admitted, combined with means for entry of this air into the lower part of the grain.
  • an air distribution duct can be provided between the conical or pyramidal outlets directed downwards and caps or deflectors can be placed above the upper perforated part of this sheath to allow the transfer of air to the grain, without penetration of the latter inside the sheath.
  • Each sheath can be made judiciously in the manner of a beam supporting the grain of the silo.
  • the invention also relates to a composite installation comprising one or more driers and a column for slow, delayed and continuous cooling of the grain as described above, as well as means connecting the base of the drier (s) to the top of this column for feeding grain in such a way that the grain, still hot and still insufficiently dried, taken out in driers, undergoes in this delayed slow cooling column first a drying stage without ventilation, then a cooling ventilation.
  • Fig. 1 is a schematic elevational view of a slow delayed cooling installation of the continuous grain according to the invention.
  • Fig. 2 is a view taken in a plane perpendicular to that of FIG. 1.
  • Fig. 3 is a plan view of the lower part of a module.
  • Fig. 4 is a sectional view through the line IV-IV in FIG. 3.
  • Fig. 5 is a partial schematic view showing the base of a module of the installation.
  • Fig. 6 is a view similar to FIG. 5, but looking in a direction offset by 90 °.
  • Fig. 7 is a view similar to FIG. 6 but corresponding to an alternative embodiment.
  • FIGs. 1 and 2 there is shown in Figs. 1 and 2 an embodiment of a slow delayed cooling installation of the continuous grain according to the invention.
  • 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 in 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
  • a duct system 7 forming an air collector which intercepts and evacuates towards the outside at 6 (Fig. 2) the drying and cooling air having entered the silo by sheaths 4.
  • FIGs. 3 and 4 show a module generally designated by 8, with its support posts 9 and four cones 10 directed downwards 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, in a way ensuring a descent of the grain in horizontal layers, which subjects all the fractions of the grain to 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 avoiding leakage 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 motor-variator which can be for example of mechanical or electronic type, which makes possible a precise dosage of the extraction of the grain.
  • this first sheath 19 There is provided, below this first sheath 19, another sheath 20 connected to the previous one by fittings 21 and in which is mounted a high-flow collecting conveyor screw, ensuring the evacuation of the grain for example to a post of storage.
  • 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 on the cost of the posts and the bracing irons are avoided because of the embedding of the lateral posts 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 easy to see that it takes place through 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 19. The mass of the grain then undergoes in the silo a progressive displacement downwards by 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 penetrates into the base of the silo rises inside the mass of the grain and it 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 23 is connected to the base of the orifice 10a of the cone 10, this tube here being 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)
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
FR8021590A FR2491723A1 (fr) 1980-10-09 1980-10-09 Procede et installation pour le refroidissement lent differe du grain en continu
FR8021590 1980-10-09

Publications (3)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605851A1 (fr) * 1986-11-05 1988-05-06 Secemia Procede et installation de traitement du grain sortant d'un sechoir, par refroidissement lent et extraction complementaire d'humidite
WO1988004018A1 (fr) * 1986-11-22 1988-06-02 Bergwerksverband Gmbh Reacteur a lit fluidise avec un logement moule en acier allie
FR2705442A1 (fr) * 1993-05-13 1994-11-25 Calmon Olivier Dispositif de séchage en continu pour produits divisés en vrac.

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US11644237B2 (en) 2020-09-18 2023-05-09 LAW Iberica S.A. Apparatus to process grain received from a dryer
US11304424B2 (en) 2020-09-18 2022-04-19 LAW Iberica S.A. Method and apparatus to process grain process grain received from a dryer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3701203A (en) * 1971-11-22 1972-10-31 Andersons The Particulate material drying apparatus
FR2367259A1 (fr) * 1976-10-05 1978-05-05 Westlake Agricultural Eng Dispositif pour reguler le debit de sechoirs de particules a ecoulement par gravite

Family Cites Families (5)

* 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.
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
US4020561A (en) * 1975-12-17 1977-05-03 Mathews B C Method and apparatus for drying grain

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3701203A (en) * 1971-11-22 1972-10-31 Andersons The Particulate material drying apparatus
FR2367259A1 (fr) * 1976-10-05 1978-05-05 Westlake Agricultural Eng Dispositif pour reguler le debit de sechoirs de particules a ecoulement par gravite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605851A1 (fr) * 1986-11-05 1988-05-06 Secemia Procede et installation de traitement du grain sortant d'un sechoir, par refroidissement lent et extraction complementaire d'humidite
WO1988004018A1 (fr) * 1986-11-22 1988-06-02 Bergwerksverband Gmbh Reacteur a lit fluidise avec un logement moule en acier allie
FR2705442A1 (fr) * 1993-05-13 1994-11-25 Calmon Olivier Dispositif de séchage en continu pour produits divisés en vrac.

Also Published As

Publication number Publication date
EP0051008B1 (de) 1983-09-28
FR2491723B1 (de) 1984-11-09
CA1170419A (en) 1984-07-10
US4446630A (en) 1984-05-08
FR2491723A1 (fr) 1982-04-16
BR8106511A (pt) 1982-06-29
EP0051008B2 (de) 1988-03-30
DE3161043D1 (en) 1983-11-03
ATE4840T1 (de) 1983-10-15

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