EP0487829B1 - Vorrichtung zum Trocknen von Schüttgut - Google Patents

Vorrichtung zum Trocknen von Schüttgut Download PDF

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Publication number
EP0487829B1
EP0487829B1 EP91113077A EP91113077A EP0487829B1 EP 0487829 B1 EP0487829 B1 EP 0487829B1 EP 91113077 A EP91113077 A EP 91113077A EP 91113077 A EP91113077 A EP 91113077A EP 0487829 B1 EP0487829 B1 EP 0487829B1
Authority
EP
European Patent Office
Prior art keywords
bulk material
temperature
container
air
bulk
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 - Lifetime
Application number
EP91113077A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0487829A1 (de
Inventor
Dieter Karls
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.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel 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
Application filed by Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP0487829A1 publication Critical patent/EP0487829A1/de
Application granted granted Critical
Publication of EP0487829B1 publication Critical patent/EP0487829B1/de
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
    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • 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
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods

Definitions

  • the invention relates to a device for drying bulk material in an essentially cylindrical bulk container according to the preamble of claim 1.
  • DE-OS 20 52 334 It is also known from DE-OS 20 52 334 a method and an apparatus for drying bulk material, the bulk material being dehumidified with heated dry gas, in particular air, in a container. To adequately dehumidify a large amount of bulk material, it is proposed to additionally heat the container. However, this requires a further air circuit and a heating device to be arranged therein, this further air circuit being switched on when the outlet temperature of the exhaust air falls below a certain temperature value.
  • the bulk goods dried in the container are removed virtually continuously and new bulk goods are fed in from above in accordance with the amount removed.
  • the heated air introduced can also be adapted to this bulk material throughput.
  • the bulk material throughput is increased to such an extent that the drying is no longer guaranteed by the maximum available air introduced, then there is a risk that bulk material with too high a moisture content leaves the drying container and that it is no longer possible to process this bulk material in a quality-appropriate manner.
  • a solution to this problem cannot be found in the known prior art.
  • a device for drying bulk goods in an essentially cylindrical bulk goods container is known.
  • a temperature measuring device is arranged which detects the temperature in the bulk material.
  • the temperature measuring device immediately sends a control signal to a hydraulic motor, which serves to discharge the dried bulk material, in this case the dried grain.
  • This direct coupling between the sensor and the motor has the disadvantage that external interference cannot be optimally corrected with this system. Is z. B. already dried grain or almost dry grain is fed, with undiminished addition of drying air under certain circumstances overheating the grain.
  • a device is also known from GB-A 2 202 318 in which an inadmissible operating state, if the temperature in the bulk material reaches a certain limit temperature, is indicated by a signal device which emits a signal. No further processing of this signal is provided.
  • This object is achieved on the basis of the preamble of the main claim by its characterizing features.
  • the invention makes use of the knowledge that there is a temperature gradient within the bulk material located in the essentially cylindrical container. This temperature gradient is based on the maximum temperature of the heated dry air supplied and ends at the temperature of the newly filled bulk material. If a lot of bulk material is now removed, this temperature gradient shifts in the direction of the bulk material outlet. If little or no bulk material is removed, this temperature gradient shifts in the direction of the bulk material inlet.
  • a temperature sensor detects the temperature of the bulk material in the area of this temperature gradient. If the temperature at the measuring point now drops, this is an indication that very much bulk material is removed. As soon as the measured temperature falls below a certain permissible limit, this means that the bulk solids are too high. Different reactions can now be triggered. On the one hand, there is the possibility of emitting an optical or acoustic signal which indicates that the bulk material removal is too high, so that the bulk material removal can be throttled. There is also the option of interrupting bulk material removal or to throttle via a switching element controlled by the temperature sensor. The temperature sensor can of course also detect the rise in temperature within the bulk material. This rise in temperature indicates that so little bulk material is removed that the amount of heated dry air supplied is too large in relation to the bulk material removal. Because of this relationship, the amount of air supplied is now reduced when an upper temperature limit is reached, so that energy-saving drying of the bulk material is associated with this.
  • a device for drying bulk goods consists, as shown in FIG. 1, of a bulk goods container 10, which has a filler neck 25 and a bulk goods removal 23.
  • This bulk material removal is provided, for example, with a closing device 13.
  • the bulk material is transported further via a conveying line 14 with pneumatic conveying.
  • the bulk material is dried in an air drying device 11.
  • an air drying device 11 Such a device is generally known and is described, for example, in DE-PS 31 31 471.
  • the air drying device 11 has a control panel 22 for controlling the device.
  • the drying air circulates in a closed air circuit and is moved by a fan which is arranged in the air drying device 11. If several bulk material containers are connected to a single air drying device, the supply air line 12 contains a branch for each bulk material container.
  • a branch 18 is provided for the bulk goods container 10.
  • a shutoff valve 16 is located on this branch. When the shutoff valve is open, the drying air flows into an injection pipe 24, which is shown schematically here and through which a uniform introduction of the heated, dry air into the bulk material 15 is ensured.
  • the inflow of air rises upwards through the bulk material 15, heats it up, at the same time absorbs the moisture present in the bulk material, leaves the bulk material container via the air outlet 19 and is in turn fed to the air drying device 11 via the exhaust air line 20.
  • the conveying line 14 is connected to one or more plastic processing machines, for example injection molding machines.
  • the operating cycle of these injection molding machines is normally constant, so that there is a quasi-continuous removal of the plastic granulate and a uniform feeding of the same into the bulk material container.
  • the amount of dry air supplied to the bulk material container is adapted to the maximum throughput of the plastic granulate.
  • FIG. 4 shows the temperature curve theta / degree C of the bulk material in the bulk material container above the maximum filling level.
  • Curve A shows the temperature curve that occurs when the plastic granulate is removed evenly at a medium removal rate. It can be seen that in the lower half of the container the temperature of the plastic granulate is approximately constant and corresponds to the temperature of the heated air supplied, in this case 80 degrees C.
  • the temperature of the bulk material decreases continuously in the upper area of the container and reaches the temperature at the upper edge of the bulk material cone that the bulk material is at Filling in the container usually has. This temperature is around 20 degrees.
  • h0 denotes the height of the outlet of the container
  • h max means the top edge of the bulk material cone.
  • a temperature sensor is located at a position of the bulk goods container, which is denoted by h t in FIG.
  • This temperature sensor 21 measures the bulk material temperature of the bulk material surrounding it. This essentially corresponds to the temperature at which the air that passes the temperature sensor is at. This temperature is shown in Figure 4 with the designation t1.
  • the temperature sensor 21 is connected to a signal converter 17.
  • This signal converter converts the measured temperature into an analog digital electrical signal.
  • This signal arrives at a warning device 26, which consists, for example, of an acoustic and an optical signal transmitter.
  • a temperature curve B will occur.
  • This temperature curve B shows that the dwell time of the removed bulk material in the bulk material container is too short to ensure adequate drying.
  • the bulk material is heated to the temperature of 80 degrees at short notice. This short time is not enough to achieve complete drying of the bulk material.
  • the temperature sensor detects a drop in temperature up to the temperature point t2. This temperature point is below a limit temperature which is such that above this limit temperature t g sufficient drying of the bulk material is still ensured.
  • a warning signal is emitted via the warning device 26 below this limit temperature. This warning signal shows that the granulate removal must be interrupted until this limit temperature t g is exceeded again.
  • the warning signal of the warning device 26 can, through the optical and / or acoustic effect, cause an operator to initiate a measure that reduces the consumption of plastic granulate.
  • the signal converter 17 can also be connected directly to a control device 27 for the closing device 13. With this type of connection of the temperature sensor 21 with the closing device 13, monitoring by an operator is superfluous.
  • the delivery to bulk goods is controlled independently depending on whether the limit temperature t g is exceeded or not reached. That is, as soon as the temperature falls below the limit, the control device 27 causes the flow of bulk material to be interrupted via the closing device 13.
  • the temperature sensor can also take on the task of temperature monitoring, as described by FIGS. 1 or 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Fertilizers (AREA)
EP91113077A 1990-11-24 1991-08-03 Vorrichtung zum Trocknen von Schüttgut Expired - Lifetime EP0487829B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4037443A DE4037443A1 (de) 1990-11-24 1990-11-24 Vorrichtung zum trocknen von schuettgut
DE4037443 1990-11-24

Publications (2)

Publication Number Publication Date
EP0487829A1 EP0487829A1 (de) 1992-06-03
EP0487829B1 true EP0487829B1 (de) 1995-06-14

Family

ID=6418863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113077A Expired - Lifetime EP0487829B1 (de) 1990-11-24 1991-08-03 Vorrichtung zum Trocknen von Schüttgut

Country Status (8)

Country Link
US (1) US5182871A (cs)
EP (1) EP0487829B1 (cs)
AT (1) ATE123868T1 (cs)
CA (1) CA2056154A1 (cs)
CS (1) CS355191A3 (cs)
DE (2) DE4037443A1 (cs)
HU (1) HUT61094A (cs)
PL (1) PL292496A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112240680A (zh) * 2019-07-17 2021-01-19 株式会社松井制作所 粉粒体材料的干燥装置及粉粒体材料的干燥方法

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0669510T3 (da) * 1994-02-25 1999-08-16 Motan Holding Gmbh Tørreapparat
DE4434498C2 (de) * 1994-09-27 1996-12-12 Henkel Ecolab Gmbh & Co Ohg Verfahren zum Reinigen von Geschirr in gewerblichen Geschirrspülmaschinen und zur Durchführung des Verfahrens geeignete Geschirrspülmaschine
DE19848140C5 (de) * 1998-10-20 2008-10-02 Klaus Wilhelm Trocknungsvorrichtung zum Trocknen von schüttfähigem Material
DE19902327A1 (de) * 1999-01-21 2000-07-27 Mann & Hummel Protec Gmbh Verfahren zum Aufheizen von Schüttgütern, insbesondere Kunststoffgranulat
DE19931357C1 (de) * 1999-07-07 2001-04-05 Colortronic Gmbh Verfahren und Vorrichtung zum Trocknen von Granulat
DE10238946A1 (de) 2002-08-24 2004-03-04 Mann + Hummel Protec Gmbh Fördervorrichtung für schüttfähiges Gut
ITVR20030053A1 (it) * 2003-05-05 2004-11-06 Moretto Plastics Automation S R L Apparecchiatura ed impianto di deumidificazione a setacci molecolari
DE102004004680A1 (de) * 2004-01-29 2005-10-20 Mann & Hummel Protec Gmbh Automatisches Steuern des Trocknens von Schüttgut
US7343700B2 (en) 2005-01-28 2008-03-18 Mann & Hummel Protec Gmbh Automatic control of the drying of particulate material
DE102005062857A1 (de) * 2005-12-23 2007-06-28 Hauni Maschinenbau Ag Verfahren und Vorrichtung zum Trocknen eines Faserprodukt-Massenstroms
US7856737B2 (en) * 2007-08-28 2010-12-28 Mathews Company Apparatus and method for reducing a moisture content of an agricultural product
US9950872B2 (en) 2015-11-30 2018-04-24 Superior Manufacturing LLC Bin sweep auger unplugging system
PL233328B1 (pl) * 2017-09-13 2019-09-30 Univ Ekonomiczny We Wroclawiu Urządzenie strumieniowo-grzewcze

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2069193A (en) * 1936-06-20 1937-01-26 Yorktown Electric Roaster Mfg Automatic roaster
US2676095A (en) * 1948-01-14 1954-04-20 Erie Mining Co Indurating furnace and process
US2903800A (en) * 1955-07-05 1959-09-15 Svenska Flaektfabriken Ab Turbulent pneumatic driers for granular and pulverulent material
DE1451265B2 (de) * 1963-03-30 1970-02-05 Siemens AG, 1000 Berlin u. 8000 München Verfahren zum Betrieb von mit beweglichen Masseteilchen als Wärmeträger arbeitenden Apparaten, vorzugsweise Wärmetauschern, sowie Einrichtung zur Durchführung des Verfahrens
US3563460A (en) * 1968-10-25 1971-02-16 Curtis Dyne Products Corp Grain bin aeration control
DE2052334A1 (en) * 1970-10-24 1972-04-27 Graeff R Granule drying - with primary and secondary heated air streams in the hopper
US3875683A (en) * 1974-05-17 1975-04-08 Whitlock Inc Integral heater plenum drying hoppers
US4004351A (en) * 1975-07-28 1977-01-25 Gilmore-Tatge Manufacturing Co., Inc. Grain drying apparatus
US4053991A (en) * 1976-04-13 1977-10-18 Steffen Sylvester L Automatic control for maintaining equilibrium temperature/moisture between stored grain and atmosphere
US4152840A (en) * 1977-08-31 1979-05-08 David Manufacturing Co. Grain dryer control system
DE3131471A1 (de) * 1981-03-20 1982-09-30 Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff Vorrichtung zum trocknen feuchter abluft aus einem oder mehreren schuettgut-trocknungsbehaeltern
EP0095265A3 (en) * 1982-05-21 1984-11-14 Moisture Control & Measurement Limited Control of drying operation
US4568417A (en) * 1982-09-16 1986-02-04 The Babcock & Wilcox Company Control system for prilling towers
SE450774B (sv) * 1984-08-24 1987-07-27 Skf Steel Eng Ab Sett for kylning av stryckeformigt material samt anordning for genomforande av settet
US4688332A (en) * 1986-03-21 1987-08-25 Sentry Technologies, Inc. Method and apparatus for aeration of stored grain
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
US4773168A (en) * 1986-12-24 1988-09-27 Aec, Inc. Thermal dryer for resin processing
DE3733793A1 (de) * 1987-10-06 1989-04-20 Graeff Roderich Wilhelm Verfahren und vorrichtung zum kristallisieren von amorphem kunststoffgranulat
DE3809749C1 (en) * 1988-03-23 1989-04-06 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg, De Appts. for drying heat sensitive bulk goods - has container holding goods through which hot air is re-circulated and a heater controlled by sensor in hot air outlet
DE8814825U1 (de) * 1988-11-29 1989-02-02 Becker, Markus, 3501 Habichtswald Durchlauftrockner, insbesondere Durchlauftrockner für Getreide
DE3929858A1 (de) * 1989-09-08 1991-03-21 Mann & Hummel Filter Verfahren zum trocknen von schuettgut in einem schuettgutbehaelter
DE8910763U1 (de) * 1989-09-09 1991-01-17 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg Vorrichtung zum Trocknen von Schüttgut

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112240680A (zh) * 2019-07-17 2021-01-19 株式会社松井制作所 粉粒体材料的干燥装置及粉粒体材料的干燥方法
CN112240680B (zh) * 2019-07-17 2022-06-07 株式会社松井制作所 粉粒体材料的干燥装置及粉粒体材料的干燥方法

Also Published As

Publication number Publication date
CS355191A3 (en) 1992-06-17
CA2056154A1 (en) 1992-05-25
PL292496A1 (en) 1992-07-27
DE59105712D1 (de) 1995-07-20
HU912630D0 (en) 1992-01-28
ATE123868T1 (de) 1995-06-15
HUT61094A (en) 1992-11-30
EP0487829A1 (de) 1992-06-03
DE4037443A1 (de) 1992-05-27
US5182871A (en) 1993-02-02

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