EP2719983B1 - Trocknungsanlage für Schüttgut mit einem Lufteinleiter - Google Patents

Trocknungsanlage für Schüttgut mit einem Lufteinleiter Download PDF

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Publication number
EP2719983B1
EP2719983B1 EP12007103.0A EP12007103A EP2719983B1 EP 2719983 B1 EP2719983 B1 EP 2719983B1 EP 12007103 A EP12007103 A EP 12007103A EP 2719983 B1 EP2719983 B1 EP 2719983B1
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EP
European Patent Office
Prior art keywords
air
drying
drying zones
zones
exhaust
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.)
Active
Application number
EP12007103.0A
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German (de)
English (en)
French (fr)
Other versions
EP2719983A1 (de
Inventor
Thomas Christian Laxhuber
Christoph Höfler
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.)
Stela Laxhuber GmbH
Original Assignee
Stela Laxhuber GmbH
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
Priority to EP12007103.0A priority Critical patent/EP2719983B1/de
Priority to LTEP12007103.0T priority patent/LT2719983T/lt
Priority to DK12007103.0T priority patent/DK2719983T3/en
Priority to HUE12007103A priority patent/HUE035348T2/en
Application filed by Stela Laxhuber GmbH filed Critical Stela Laxhuber GmbH
Priority to PL12007103T priority patent/PL2719983T3/pl
Priority to PT120071030T priority patent/PT2719983T/pt
Priority to ES12007103.0T priority patent/ES2635032T3/es
Priority to SI201231011T priority patent/SI2719983T1/sl
Priority to RS20170712A priority patent/RS56264B1/sr
Publication of EP2719983A1 publication Critical patent/EP2719983A1/de
Application granted granted Critical
Publication of EP2719983B1 publication Critical patent/EP2719983B1/de
Priority to HRP20171130TT priority patent/HRP20171130T1/hr
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F26B17/122—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 material moving through a cross-flow of drying gas; the drying enclosure, e.g. shaft, consisting of substantially vertical, perforated walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/06—Grains, e.g. cereals, wheat, rice, corn

Definitions

  • the invention relates to a drying plant for bulk material, in particular agricultural grains, with a plurality of drying zones, which are traversed successively of bulk material to be dried, and an air duct for passing air through the drying zones, in which a Heileinleiter for introducing fresh air from the environment of the drying plant is provided as supply air in a first part of the drying zones. Furthermore, the invention relates to a method for operating such a drying plant for bulk material.
  • drying plants of the type mentioned above agricultural products, in particular grain crops such as cereals and corn, but also oilseed rape or sunflowers, are dried with warm air. These drying methods have prevailed in the agricultural sector, because a high-performance, high-quality and gentle drying of agricultural grains is possible.
  • the investment and operating costs are compared to other drying methods, such as freeze, vacuum or radiation drying, low.
  • the so-called roof-shaft dryer has prevailed, in which the drying zones are formed by a vertical drying tower or a drying column, which is passed through from top to bottom of the bulk material to be dried.
  • the air duct takes place across this drying tower. Heated supply air flows in on one side of the drying tower and then flows through the product fill there. The product or bulk material heats up and releases its moisture to the passing warm air. The bulk material dries. In return, the air cools and moistens. The moist air escapes as exhaust air on the other side of the drying tower.
  • the supply air and / or exhaust air is conveyed by motor-driven fans, which are arranged in the air supply and / or the air discharge.
  • Out DE-U-20 2004 018 492 is a drying device for bulk material, such as grain, known in which a hot air generator and a plurality of superposed drying levels and air ducts are provided for supplying differently tempered air to different drying levels. At least two drying levels each own their own air heaters are assigned, the hot air generator can be operated independently. The air is supplied through a common supply air shaft and sucked by a respective blower on the side opposite the hot air generator side of a guide shaft for the bulk material. Such air duct is technically relatively expensive and not very energy efficient.
  • Out FR-A-0 454 569 is a grain dryer according to the preamble of the first claim and a method according to the preamble of the sixth claim known, in which by means of a single air suction air is sucked through a plurality of drying sections.
  • the air is supplied by two Heileinleiter.
  • One of the air introduction leads to a first air heater and into a middle part of the drying sections.
  • the second air entrainer leads supply air without air heating to two drying sections, which serve to cool the dried grain. Furthermore, the second air introducer feed air to another air heater.
  • This supply air is fed into a lower part of the drying sections and to a third air heater, through which this supply air is then mixed with the exhaust air from the middle part of the drying sections, to lead them into an upper part of the drying sections.
  • a part of drying sections is provided with a third Heileinleiter, which serves for intermediate cooling of the grain.
  • a drying plant for granular goods in which heated by means of a first air cleaner heated hot air is sucked through an upper part of drying sections.
  • a first air cleaner heated hot air is sucked through an upper part of drying sections.
  • cold cooling air and also the heated hot air is supplied.
  • the hot air is supplied by means of a single air heater and heated.
  • a second air suction exhaust air is sucked from the lower part of drying sections and returned this exhaust air to the single air heater.
  • This recirculated and reheated to the single air heater exhaust air is then also fed to the lower part and the upper part of drying zones.
  • a drying plant for bulk material is provided, in particular for agricultural grain crops, with a plurality of drying zones, which are successively passed through to be dried bulk material.
  • the drying plant is provided with an air duct for passing air through the drying zones, in which an air inlet for introducing fresh air from the environment of the drying plant is provided as supply air in a first part of the drying zones.
  • an air conveyor for forwarding exhaust air from the first part of the drying zones is provided as supply air into a second part of the drying zones.
  • the forwarded exhaust air from a part of the drying zones is thereby improved in terms of their degree of moisture that this exhaust air is supplied or mixed with additional fresh air from the environment of the drying plant.
  • the added fresh air has a lower degree of moisture and thus also reduces the degree of moisture of the resulting air mixture.
  • the exhaust air from the first part of the invention Drying zones can be more heavily loaded with dust than in known drying systems, since not the above-mentioned fire hazard.
  • the drying plant according to the invention can be run hotter in the first part of the drying zones than conventional drying plants. While it is common in conventional drying systems to operate this first part of the drying zones at a temperature of 80 ° C to 125 ° C, the drying system according to the invention in the first part of the drying zones advantageously with a temperature of 130 ° C to 160 ° C, particularly preferred be operated from 140 ° C to 150 ° C.
  • the inventive principle also provides higher throughputs than conventional principles.
  • this comparatively high dust load in the second part of the drying zones can then be returned to the material to be dried there.
  • this additional fresh air supplied is also heated as such, the heating taking place independently of the exhaust air passed from the first part of the drying zones.
  • an air heater is provided for heating the first fresh air fed in by the air inlet
  • a further, second air heater is provided for heating the further, second fresh air supplied by the further air inlet.
  • an air mixture of exhaust air from the first part of the drying zones and further fresh air from the environment of the drying plant to a temperature between 100 ° C and 145 ° C, in particular between 110 ° C and 125 ° C, adjusted.
  • These temperature ranges are in view of the supply according to the invention of further, heated fresh air for heating exhaust air from a first part of the drying zones in view of the overall energy balance of such a drying plant particularly advantageous.
  • an air suction or blower for sucking exhaust air from the second part of the drying zones is provided according to the invention and additionally another air suction for sucking the exhaust air from the first part of the drying zones.
  • the two air suckers in each case a suction is generated by the first part of the drying zones and a further suction through the second part of the drying zones.
  • the two air suckers can be controlled independently of each other in terms of their suction power, whereby the extraction of the exhaust air and the admixture of other fresh air can be optimally matched.
  • With the air suckers the exhaust air is conveyed in the direction of the second part of the drying zones to be sucked there as supply air together with the other fresh air.
  • the amount of additional fresh air to be aspirated can be determined by suction of the further or second air suction.
  • a throttling or regulating flap is advantageously provided on the further or second air inlet, with which the air resistance for the air flows of forwarded exhaust air and supplied, further fresh air can be influenced.
  • an air return or circulating air guide for returning exhaust air from the first part of the drying zones is provided as supply air back into the first part of the drying zones.
  • At the circulating air guide is preferably a third air inlet for introducing fresh air from the environment of the drying plant in a third part of the Drying zones provided.
  • This third part of the drying zones is preferably the last flowed through by the bulk material, the lowest section of the drying column, which is used as a so-called cooling area for the bulk material.
  • the lower section is preferably provided on the drying column upstream of or above the cooling zone in the flow direction of the bulk material.
  • the second part of the drying zones is then the upper section of the drying column arranged above this first part.
  • an air return for returning exhaust air from the third part of the drying zones is also advantageously provided as supply air into the first part of the drying zones.
  • This type of air return forms part of the above, energetically advantageous air return in the last section of the drying column.
  • a method for operating a drying plant for bulk material, in particular for agricultural crops, in which a plurality of drying zones are successively passed through by drying bulk material and air is passed through the drying zones is also provided accordingly.
  • fresh air from the environment of the drying plant is introduced as a supply air in a first part of the drying zones at an air entrained.
  • exhaust air from the first part of the drying zones is forwarded as supply air in a second part of the drying zones.
  • Further fresh air from the environment of the drying plant is introduced into the supply air to the second part of the drying zones or in the second part of the drying zones at a further air entrainer.
  • According to the invention is in such a method for operating a drying plant in accordance with the above construction on an air heater supplied by the air inlet fresh air and at another air heater the heated by the other Heilteinleiter further fresh air heated.
  • a drying plant 10 for agricultural grains includes as essential components a drying column 12 with drying zones T16 to T1, an air feed 14 and an air discharge 16.
  • a filling opening 18 for bulk material 20 to be dried is a filling opening 18 for bulk material 20 to be dried, in the present case corn kernels. Due to the gravitational force acting on it, the bulk material 20 passes successively downwards through the drying zones T16 to T1 of the drying column 12. The bulk material 20 trickles over (not illustrated in detail) each open at the bottom roof-shaped air ducts.
  • the air supply 14 is designed with a first air inlet 22, referred to as a Zu Kunststoffschacht at the bottom, based on Fig. 1 left end portion of the drying system 10 is formed.
  • Fresh air 24 from the surroundings of the drying installation 10 passes through the air inlet 22 into a first part 26 of the drying zones T16 to T1, namely into the drying zones T8 to T3.
  • This fresh air 24 is heated at the air inlet 22 in a first air heater 28.
  • the heated fresh air 24 is sucked as supply air through the first part 26 of the drying zones T16 to T1. It accumulates with moisture from the local bulk material 20 and is carried out as moistened exhaust air 30 on the right side of these drying zones T8 to T3 again from the drying column 12.
  • This exhaust air 30 is directed with an air duct 32 in the form of a fan (in particular an axial fan or a centrifugal fan) vertically upwards to the left side of the drying zones T16 to T9 forming a second part 36 of the drying zones T16 to T1.
  • a fan in particular an axial fan or a centrifugal fan
  • the air conductor 32 is associated with a second air heater 38 which heats the guided through the air cleaner 34 exhaust air 30, which is now cooled, again to a temperature of about 140 ° C.
  • a heating of the exhaust air 30 by means of the air heater 38 is a high risk of ignition and fire, because the exhaust air 30 has been enriched in the drying zones T8 to T1 not only with moisture but also with dust and suspended solids from the bulk material.
  • the reheated exhaust air 30 then passes through the second part 36 of the drying zones T16 to T1 and flows as exhaust air 40 through the air outlet 16 from.
  • Inventive solutions of a drying system 10 are shown, in which the air conveyor 32 is designed differently.
  • the air router 32 according to Fig. 2 has an air suction 34, is conveyed with the exhaust air 30 from the drying zones T8 to T1 to the drying zones T16 to T9, without heating this exhaust air 30 thereby.
  • 44 further fresh air 46 from the environment of the drying plant 12 is introduced into an air duct 48 above the air suction 34 by means of another Lucasteinleiters.
  • this air duct 48 is a second air heater 50 according to the invention, by means of which the air inlet 44 supplied further fresh air 46 can be heated. Since this fresh air 46 is not enriched with dust or suspended matter, there is no risk of fire during such heating of further fresh air 46.
  • the heated, further fresh air 46 is mixed with the exhaust air 30 such that a total of a temperature of the air mixture or the air mixture of about 110 ° C to 125 ° C sets.
  • the air mixture is then subsequently, in accordance with the drying plant 10 according to Fig. 1 by means of an air suction device 42 and optionally by means of a deduster (not shown) at the air outlet 16 through the drying zones T16 to T9 outside into the environment of the drying plant 10 promoted.
  • the drying zones T2 and T1 of the drying column 12 according to Fig. 2 are designed as a third part 52 of the drying zones T16 to T1 or as a so-called cooling area in each case as cooling zones into which fresh air 54 can be supplied directly from the outside by means of a third air inlet 56.
  • This fresh air 54 passes through the drying zones T2 and T1 and then as exhaust air 30 in the air suction 34th
  • FIG. 3 an embodiment of a drying plant 10 is illustrated, in which the fresh air 54 is supplied to the drying zones T2 and T1 with the third air inlet 56 from the outside on the other side of the drying column 12. Subsequently, the resulting exhaust air from the drying zones T2 and T1 is directed into a further air duct 60 on the side of the air supply 14.
  • the further air duct 60 is located above or downstream of the first air heater 28, so that the exhaust air from the drying zones T2 and T1 is added directly to the already heated fresh air 24 and subsequently the drying zones T8 to T3 is supplied as supply air.
  • the exhaust air 30 from the drying zones T8 to T3 then passes into the air duct 32 as explained above, in order to supply this air subsequently heated, further fresh air 46 and forward them to the drying zones T16 to T9.
  • the Fig. 4 shows an embodiment of a drying plant 10, in which the guided through the drying zones T2 and T1 fresh air 54 and also the exhaust air 30 from the drying zones T4 and T3 is used as circulating air.
  • an air return 58 is provided, by means of which this exhaust air from the drying zones T4 to T1 is fed back to the air supply side of the drying zones T8 to T3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
EP12007103.0A 2012-10-12 2012-10-12 Trocknungsanlage für Schüttgut mit einem Lufteinleiter Active EP2719983B1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DK12007103.0T DK2719983T3 (en) 2012-10-12 2012-10-12 Drying system for bulk material with an air inlet
HUE12007103A HUE035348T2 (en) 2012-10-12 2012-10-12 Dryer for bulk goods with air intake
SI201231011T SI2719983T1 (sl) 2012-10-12 2012-10-12 Sušilnica za razsuti material z dovodom za dovajanje zraka
PL12007103T PL2719983T3 (pl) 2012-10-12 2012-10-12 Suszarnia dla materiału sypkiego z wlotem powietrza
LTEP12007103.0T LT2719983T (lt) 2012-10-12 2012-10-12 Biriųjų medžiagų džiovinimo sistema su oro įsiurbimo įrenginiu
ES12007103.0T ES2635032T3 (es) 2012-10-12 2012-10-12 Sistema de secado para producto a granel con introductor de aire
EP12007103.0A EP2719983B1 (de) 2012-10-12 2012-10-12 Trocknungsanlage für Schüttgut mit einem Lufteinleiter
RS20170712A RS56264B1 (sr) 2012-10-12 2012-10-12 Sušara za rasuti materijal sa uvodnikom vazduha
PT120071030T PT2719983T (pt) 2012-10-12 2012-10-12 Unidade de secagem para material a granel com um dispositivo de introdução de ar
HRP20171130TT HRP20171130T1 (hr) 2012-10-12 2017-07-21 Sustav za sušenje za rasuti materijal s jedinicom za usis zraka

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12007103.0A EP2719983B1 (de) 2012-10-12 2012-10-12 Trocknungsanlage für Schüttgut mit einem Lufteinleiter

Publications (2)

Publication Number Publication Date
EP2719983A1 EP2719983A1 (de) 2014-04-16
EP2719983B1 true EP2719983B1 (de) 2017-05-31

Family

ID=47115147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12007103.0A Active EP2719983B1 (de) 2012-10-12 2012-10-12 Trocknungsanlage für Schüttgut mit einem Lufteinleiter

Country Status (10)

Country Link
EP (1) EP2719983B1 (pt)
DK (1) DK2719983T3 (pt)
ES (1) ES2635032T3 (pt)
HR (1) HRP20171130T1 (pt)
HU (1) HUE035348T2 (pt)
LT (1) LT2719983T (pt)
PL (1) PL2719983T3 (pt)
PT (1) PT2719983T (pt)
RS (1) RS56264B1 (pt)
SI (1) SI2719983T1 (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3317601A1 (de) * 2015-07-02 2018-05-09 Cebcon Technologies GmbH Verfahren und anlage zum aufbereiten und trocknen von festen kleinstückigen materialien
CN106017041A (zh) * 2016-07-28 2016-10-12 郭立春 一种具有两种烘干节的塔式粮食干燥机
CN108759377A (zh) * 2018-05-30 2018-11-06 安徽睿科智能制造技术研究院有限公司 一种可处理杂质的谷物烘干机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479309A (en) * 1982-04-05 1984-10-30 Tolson Raymond C Method and apparatus for drying cereal grain
FR2567636B1 (fr) * 1984-07-10 1988-05-13 Satig Ets Cesbron Cie Sechoir pour matieres en grains
FR2630621B1 (fr) * 1988-04-29 1994-06-10 Socoa Sechoir a grain
FR2661313B1 (fr) * 1990-04-27 1992-08-14 Comia Fao Sa Sechoir a grain.
DE202004018492U1 (de) 2004-11-30 2005-04-21 Riela - Getreidetechnik Karl-Heinz Knoop Trocknungsvorrichtung mit mehreren Warmlufterzeugern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2635032T3 (es) 2017-10-02
HUE035348T2 (en) 2018-05-02
HRP20171130T1 (hr) 2017-10-06
PL2719983T3 (pl) 2017-10-31
EP2719983A1 (de) 2014-04-16
RS56264B1 (sr) 2017-11-30
DK2719983T3 (en) 2017-08-21
SI2719983T1 (sl) 2017-09-29
LT2719983T (lt) 2017-10-25
PT2719983T (pt) 2017-08-04

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