EP0508546A1 - Trocknungsvorrichtung - Google Patents

Trocknungsvorrichtung Download PDF

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Publication number
EP0508546A1
EP0508546A1 EP92201021A EP92201021A EP0508546A1 EP 0508546 A1 EP0508546 A1 EP 0508546A1 EP 92201021 A EP92201021 A EP 92201021A EP 92201021 A EP92201021 A EP 92201021A EP 0508546 A1 EP0508546 A1 EP 0508546A1
Authority
EP
European Patent Office
Prior art keywords
burner
drying
dust
air
heat exchanger
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.)
Withdrawn
Application number
EP92201021A
Other languages
English (en)
French (fr)
Inventor
Adriaan Van Den Broek
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.)
VANDENBROEK INTERNATIONAL BV
Original Assignee
VANDENBROEK INTERNATIONAL BV
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 VANDENBROEK INTERNATIONAL BV filed Critical VANDENBROEK INTERNATIONAL BV
Publication of EP0508546A1 publication Critical patent/EP0508546A1/de
Withdrawn legal-status Critical Current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
    • F26B21/02—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
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure

Definitions

  • This invention relates to a drying apparatus for drying moisture-containing, solid/liquid materials such as grass, sludge or the like.
  • the conventional apparatuses for drying solid/liquid materials typically operate with a rotary drying drum where the material to be dried is dried using hot combustion air coming from a burner. At the outlet of the drum, the dried solid part of the solid/liquid material is separated and the air/vapor/dust-mixture is purified via cyclones, gas scrubbers, afterburners and the like, so that the air/vapor/dust-mixture discharged into the atmosphere satisfies the current environmental requirements.
  • cyclones, gas scrubbers, afterburners and the like so that the air/vapor/dust-mixture discharged into the atmosphere satisfies the current environmental requirements.
  • the input drying medium of the drying drum is the output air/vapor/dust-mixture of the drying drum, heated via a heat exchanger.
  • the excess of gas, vapor and dust that results from the drying process in the drying drum and any leakage air that has entered the drying drum by way of the solid/liquid material are passed via a gas scrubber to a solid-matter burner and burned therein.
  • the combustion gases of this solid-matter burner are passed to the heat exchanger referred to and serve to heat the part of the air/vapor/dust-mixture that is directed to the drying drum again. Then the combustion gases are emitted into the atmosphere via a second gas scrubber.
  • gas scrubbers are used for condensing the vapor present in the output air/vapor/dust-mixture of the drying drum.
  • the part of the air/vapor/dust-mixture that is passed to the solid-matter burner must not contain too much vapor because then the burner does not function properly.
  • the water released by condensation in the gas scrubbers contains heavy metals and other contaminants. Therefore, this contaminated water cannot be discharged into the environment and must be purified. Purification of water containing the above-mentioned contaminants can only be realized at very high costs in complex and costly apparatus.
  • the object of the invention is to provide a drying apparatus for solid/liquid materials, in which the above-mentioned drawbacks are overcome.
  • the drying apparatus comprising a drying drum having its air/vapor/dust-mixture outlet connected to its inlet via a return circuit including a cyclone, a fan, and a primary circuit of a heat exchanger having a secondary circuit connected to an outlet of a burner which has a secondary air inlet connected to the return circuit, is characterized according to the invention in that the burner is a gas or oil burner suitable for secondary air having a high moisture content.
  • the part of the air/vapor/dust-mixture that is passed to the secondary air inlet of the burner can be passed to the burner directly, so that it is no longer necessary to remove the vapor from the mixture by means of condensers.
  • the undesirable by-product namely, water contaminated with heavy metals, is avoided.
  • a lime filter downstream from the secondary circuit of the heat exchanger for purifying the combustion gases of the burner, so that the heavy metals and other contaminants which are present in the combustion gases do not end up in the atmosphere.
  • the secondary circuit of the heat exchanger can be connected to a primary circuit of a second heat exchanger having a secondary circuit included in the return circuit, so that, with the aid of the second heat exchanger, the part of the air/vapor/dust-mixture that is passed to the burner as secondary air is preheated.
  • the residual heat stored in the combustion gases can be used for other processes such as predrying the solid/liquid material, before the combustion gases are emitted into the atmosphere.
  • the temperature of the air/vapor/dust-mixture and of the combustion gases must remain 30° above the dew point temperature thereof in the entire apparatus.
  • the drawing is a diagrammatic representation of the principle of the drying apparatus according to the invention.
  • the embodiment shown diagrammatically comprises a drying drum 1, a cyclone 2, a fan 3, a control valve 4, two heat exchangers 6,8, a burner 9, a lime filter 10 and a fan 12.
  • the solid/liquid material WM to be dried is passed into the drying drum 1 and dried by an air/vapor/dust-mixture coming from a heat exchanger 6.
  • the dried material DM is separated.
  • the air/vapor/dust-mixture egressing from the drying drum and consisting of the input air/vapor/dust-mixture plus the dust released and the vapors and gases released during the drying process and any leakage air entering the drying drum by way of the solid/liquid material is passed to a cyclone 2.
  • the cyclone 2 removes the dust from the air/vapor/dust-mixture to a large extent.
  • a part of the air/vapor/dust-mixture is then passed through duct 5 to the heat exchanger 6.
  • the mixture is heated, so that the relative humidity of the mixture diminishes and the mixture can absorb moisture again and hence serve as a drying medium. From the heat exchanger 6 the heated mixture is returned to the drying drum 1.
  • a part of the air/vapor/dust-mixture, corresponding with the amount of gas, vapor and dust that is released during drying of the solid/liquid material plus an amount of leakage air which has entered the drying drum via the solid/liquid material is passed into duct 7 via the control valve 4. From there it passes to a heat exchanger 8, where it is heated by the combustion gases of a burner 9, and is subsequently passed to the gas or oil burner 9, where it is burned as secondary air.
  • the dust particles and the odorous gases released during the drying process are burned.
  • the combustion gases are passed via the heat exchanger 6, where the combustion gases heat the recirculated air/vapor/dust-mixture in duct 5, and then via heat exchanger 8, where the combustion gases heat the air/vapor/dust-mixture in duct 7, to a lime filter 10, where the heavy metals and other contaminants are removed from the combustion gases before they are discharged into the atmosphere, for instance via a stack 11.
  • the gas or oil burner 9 is supplied with primary air via a fan 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)
EP92201021A 1991-04-08 1992-04-08 Trocknungsvorrichtung Withdrawn EP0508546A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9100606A NL9100606A (nl) 1991-04-08 1991-04-08 Drooginrichting.
NL9100606 1991-04-08

Publications (1)

Publication Number Publication Date
EP0508546A1 true EP0508546A1 (de) 1992-10-14

Family

ID=19859107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92201021A Withdrawn EP0508546A1 (de) 1991-04-08 1992-04-08 Trocknungsvorrichtung

Country Status (2)

Country Link
EP (1) EP0508546A1 (de)
NL (1) NL9100606A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0714006A1 (de) * 1994-11-24 1996-05-29 W. Kunz AG Verfahren zum Trocknen einer Substanz, insbesondere von Holzspänen
NL1005482C2 (nl) 1997-03-10 1998-09-17 Opdenkamp Adviesgroep B V Cycloondroger voor slib.
WO1999042775A1 (es) 1998-02-17 1999-08-26 Combustion Y Secado Ingenieria, S.A. Secadero tubular por toberas y fluidificacion
KR20010016772A (ko) * 1999-08-03 2001-03-05 김재숙 슬러지 건조 시스템
WO2002040932A1 (de) * 2000-11-14 2002-05-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum aufbereiten faseriger substanzen
EP1314943A1 (de) * 2001-11-23 2003-05-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Aufbereiten faseriger Substanzen
EP1363097A1 (de) 2002-05-13 2003-11-19 Robert Dr. Bankwitz Pneumatischer Schleudertrockner
AT413602B (de) * 2003-08-26 2006-04-15 Andritz Ag Maschf Vorrichtung und verfahren zum trocknen einer substanz, insbesondere klärschlamm
FR2902866A1 (fr) * 2006-06-22 2007-12-28 Giat Ind Sa Generateur de gaz chaud et installtion de sechage ou deshydratation mettant en oeuvre un tel generateur
EP2078911A1 (de) * 2008-01-10 2009-07-15 Kronospan CR, spol. s.r.o. Verfahren zur kontinuierlichen Trocknung von Schüttgut, insbesondere von Holzfasern und/oder Holzspänen
EP2411749A4 (de) * 2009-03-25 2016-01-20 Saxlund Internat Holding Ab Trocknungssystem und verfahren
EP3066316A4 (de) * 2013-11-07 2017-07-05 Gate 5 Energy Partners Inc. Wärmeschlamm zur energieumwandlung
CN107940937A (zh) * 2017-12-19 2018-04-20 北京中矿环保科技股份有限公司 煤泥间接干燥系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2360467A1 (de) * 1972-12-06 1974-06-12 Seiler Hermann & Sohn Ag Verfahren zum trocknen von in fluessigkeiten enthaltenen feststoffen und anlage zur durchfuehrung des verfahrens
WO1980001407A1 (en) * 1978-12-27 1980-07-10 Hooker Chemicals Plastics Corp Flash drying sludge derived fuel process
FR2466439A1 (fr) * 1979-10-04 1981-04-10 Von Roll Ag Procede de sechage de boues, notamment de boues de stations d'epuration communales
CH676500A5 (de) * 1990-05-18 1991-01-31 Werner Kunz
DE4036666A1 (de) * 1989-11-20 1991-05-23 Kurt Gisiger Verfahren und vorrichtung fuer das trocknen von organischen stoffen, insbesondere von holzteilchen
EP0459603A1 (de) * 1990-06-01 1991-12-04 Körting Hannover Ag Verfahren und Anlage zur kontinuierlichen Trocknung von Holzspänen, Holzfasern oder anderen Schüttgütern

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2360467A1 (de) * 1972-12-06 1974-06-12 Seiler Hermann & Sohn Ag Verfahren zum trocknen von in fluessigkeiten enthaltenen feststoffen und anlage zur durchfuehrung des verfahrens
WO1980001407A1 (en) * 1978-12-27 1980-07-10 Hooker Chemicals Plastics Corp Flash drying sludge derived fuel process
FR2466439A1 (fr) * 1979-10-04 1981-04-10 Von Roll Ag Procede de sechage de boues, notamment de boues de stations d'epuration communales
DE4036666A1 (de) * 1989-11-20 1991-05-23 Kurt Gisiger Verfahren und vorrichtung fuer das trocknen von organischen stoffen, insbesondere von holzteilchen
CH676500A5 (de) * 1990-05-18 1991-01-31 Werner Kunz
EP0459603A1 (de) * 1990-06-01 1991-12-04 Körting Hannover Ag Verfahren und Anlage zur kontinuierlichen Trocknung von Holzspänen, Holzfasern oder anderen Schüttgütern

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0714006A1 (de) * 1994-11-24 1996-05-29 W. Kunz AG Verfahren zum Trocknen einer Substanz, insbesondere von Holzspänen
NL1005482C2 (nl) 1997-03-10 1998-09-17 Opdenkamp Adviesgroep B V Cycloondroger voor slib.
WO1999042775A1 (es) 1998-02-17 1999-08-26 Combustion Y Secado Ingenieria, S.A. Secadero tubular por toberas y fluidificacion
KR20010016772A (ko) * 1999-08-03 2001-03-05 김재숙 슬러지 건조 시스템
WO2002040932A1 (de) * 2000-11-14 2002-05-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum aufbereiten faseriger substanzen
US6931757B2 (en) 2000-11-14 2005-08-23 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Method for conditioning fibrous substances
EP1314943A1 (de) * 2001-11-23 2003-05-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Aufbereiten faseriger Substanzen
EP1363097A1 (de) 2002-05-13 2003-11-19 Robert Dr. Bankwitz Pneumatischer Schleudertrockner
DE10221367B4 (de) * 2002-05-13 2006-05-11 Bankwitz, Robert, Dr. Pneumatischer Schleudertrockner
AT413602B (de) * 2003-08-26 2006-04-15 Andritz Ag Maschf Vorrichtung und verfahren zum trocknen einer substanz, insbesondere klärschlamm
FR2902866A1 (fr) * 2006-06-22 2007-12-28 Giat Ind Sa Generateur de gaz chaud et installtion de sechage ou deshydratation mettant en oeuvre un tel generateur
WO2007147961A3 (fr) * 2006-06-22 2008-03-20 Nexter Munitions Generateur de gaz chaud et installation de sechage ou deshydratation mettant en œuvre un tel generateur
US8011113B2 (en) 2006-06-22 2011-09-06 Nexter Munitions Hot gas generator and drying or dehydration facility implementing such a generator
EP2078911A1 (de) * 2008-01-10 2009-07-15 Kronospan CR, spol. s.r.o. Verfahren zur kontinuierlichen Trocknung von Schüttgut, insbesondere von Holzfasern und/oder Holzspänen
WO2009087108A1 (de) * 2008-01-10 2009-07-16 Kronospan Cr, Spol. S.R.O. Verfahren zur kontinuierlichen trocknung von schüttgut, insbesondere von holzfasern und/oder holzspänen
EP2388542A3 (de) * 2008-01-10 2011-12-28 Douglas Technical Limited Verfahren zur kontinuierlichen Trocknung von Schüttgut, insbesondere von Holzfasern und/oder Holzspänen
US10551121B2 (en) 2008-01-10 2020-02-04 Douglas Technical Limited Method for continuously drying bulk goods, in particular wood fibers and/or wood chips
US10690409B2 (en) 2008-01-10 2020-06-23 Douglas Technical Limited Method for continuously drying bulk goods, in particular wood fibers and/or wood chips
EP2411749A4 (de) * 2009-03-25 2016-01-20 Saxlund Internat Holding Ab Trocknungssystem und verfahren
EP3066316A4 (de) * 2013-11-07 2017-07-05 Gate 5 Energy Partners Inc. Wärmeschlamm zur energieumwandlung
CN107940937A (zh) * 2017-12-19 2018-04-20 北京中矿环保科技股份有限公司 煤泥间接干燥系统
CN107940937B (zh) * 2017-12-19 2023-04-18 光大清洁技术股份有限公司 煤泥间接干燥系统

Also Published As

Publication number Publication date
NL9100606A (nl) 1992-11-02

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