EP2622294A1 - Appareil de sechage - Google Patents

Appareil de sechage

Info

Publication number
EP2622294A1
EP2622294A1 EP11828189.8A EP11828189A EP2622294A1 EP 2622294 A1 EP2622294 A1 EP 2622294A1 EP 11828189 A EP11828189 A EP 11828189A EP 2622294 A1 EP2622294 A1 EP 2622294A1
Authority
EP
European Patent Office
Prior art keywords
drying apparatus
heating elements
drying
heating
attached
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Withdrawn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
EP11828189.8A
Other languages
German (de)
English (en)
Other versions
EP2622294A4 (fr
Inventor
Pauli Tahvanainen
Tuomo Tanninen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2622294A1 publication Critical patent/EP2622294A1/fr
Publication of EP2622294A4 publication Critical patent/EP2622294A4/fr
Withdrawn legal-status Critical Current

Links

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
    • F26B17/001—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement the material moving down superimposed floors
    • F26B17/002—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement the material moving down superimposed floors with floors which may rotate and turn over as a whole or in part, e.g. around a horizontal axis
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • 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
    • 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
    • F26B2200/24—Wood particles, e.g. shavings, cuttings, saw dust
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a drying apparatus for drying material, which drying apparatus includes a body, heating elements attached to it, between which the material to be dried is arranged to be transferred, and which are established in the body at a distance from each other and of elements attached in layers, between which the material being dried is arranged to be transferred, and one or more blower devices for removing humid air from the drying apparatus.
  • material to be dried is fed on top of heating elements and, when drying, it is allowed to drop downwards onto a lower plane or it is collected onto the plane and dropped downwards.
  • material being dried is not transferred in a totally controlled way and considering the degree of drying on different planes in drying apparatuses.
  • Heating plants burn fuels and produce heat for individual households or larger communities.
  • heating plants utilise e.g. wood in different forms or peat.
  • Boilers of heating plants use wood which is usually processed into a form suitable for the purpose, such as e.g. into chips, briquets, pellets or some other form.
  • wood materials created when processing wood such as e.g. sawdust, chips and bits.
  • Burnable material is usually stored to storage spaces beside the burner, from where the material is transferred to the burner when required. Particularly chips can be relatively humid at this step. Additionally, particularly burnable material stored in cold conditions can be frozen. When such material is fed to the feed apparatus of the burner, the purpose is that it defreezes and heats up when travelling in the feed apparatus. If the material is frozen, its feeding can involve problems. These different factors can cause problems in the feed apparatus of the burner and the operation of the burner is then not optimal. Some heating plants include separate drying apparatuses where burnable material is dried before feeding it to the burner.
  • An object of the invention is to introduce a drying apparatus by means of which above problems are eliminated.
  • a particular object of the invention is to introduce a drying apparatus used in connection with burners for drying burnable material and for processing it reliably, efficiently and quickly.
  • a further object of the invention is to introduce a drying apparatus, which can utilise the lost heat of a heating plant.
  • the drying apparatus includes a rotating device for rotating the heating elements, adjacent parts of adjacent heating elements are in the immediate vicinity of each other when the drying apparatus is in the normal position.
  • material being dried can be controllably transferred during drying and according to drying from one plane to another and the humidity of material can be monitored on different planes and the drying process controlled according to it.
  • the material being dried can be e.g. for a certain time on each of the planes.
  • the drying apparatus according to the invention is applicable for use in the drying of various dryable materials. It can be used for the drying and thawing e.g.
  • Material being dried in the drying apparatus is heated by means of medium circulating in the heating elements.
  • the heating elements are attached to each other by conductors to circulate the heatable medium in the heating elements. Then, the heating elements are provided with relatively uniform heat. However, heat is more intense at the beginning than at the end.
  • the medium is most heated at the uppermost plane and somewhat cools down when transferring onto other planes.
  • the material to be dried is fed onto the uppermost plane, whereby it has the best drying capacity.
  • the material being dried is kept for a desired time on different planes and humidity is removed by means of blowers. This time depends on the material and its humidity. In some cases, it is possible to do vice versa and convey the heated medium first to the lower heating elements.
  • the drying apparatus is particularly intended for drying burnable material and such a drying apparatus is characterised by having arranged the drying apparatus heatable by the lost heat of a heating plant. Then, the existing heat of a boiler is utilised and/or lost heat in the boiler space or exiting it efficiently in the drying apparatus. This so-called lost heat remains often totally unutilised.
  • substitute air (drying air) is conveyed to the drying apparatus from the boiler room of the heating plant.
  • the substitute air (suction air) of the drying apparatus is taken from the boiler room of the heating plant through a heat exchanger or a filter unit there and conveyed to the drying apparatus where it dries fuel efficiently and cost-effectively.
  • the drying apparatus is attached to the heat exchanger in the boiler room of the heating plant where heated liquid medium is arranged to be conveyed via a piping to the heating elements of the drying apparatus.
  • heated liquid medium can be even 120°C and, by conveying it to the heating elements, they can be efficiently heated. Dryable fuel dries very efficiently and cost-effectively in the drying apparatus according to the invention.
  • heat power from the lost heat of flue gases is conveyed to the drying apparatus by recovering heat by means of a heat exchanger via which the flue gases are conveyed. Then, the heat of flue gases, which would not otherwise be utilised, is employed.
  • FIG. 1 shows an oblique front view of a drying apparatus according to the invention
  • Fig. 2 shows a front view of the drying apparatus according to Fig. 1
  • Fig. 3 shows a rear view of the drying apparatus according to Fig. 1
  • Fig. 4 shows a top view of the drying apparatus according to Fig. 1
  • Fig. 5 shows a cross section B-B according to Fig. 4, and
  • Figs. 6-12 show a cross section A-A according to the figure when heating elements have been rotated to different positions.
  • the drying apparatus includes a body 1 and heating elements 2-5 attached to it, which are established of tubular elements attached to the body at a distance from each other and in layers on a certain plane. Furthermore, adjacent heating elements 2a, 2b on the uppermost plane 2 are slightly at different points in the vertical direction on two planes.
  • the drying apparatus is attached to a heat exchanger in the boiler room of a heating plant where heated liquid medium is arranged to be conveyed via a piping 7 to the heating elements of the drying apparatus.
  • the piping 7 is attached to the edgemost heating element on the uppermost plane.
  • the other end of this heating element is attached by a conductor 8 to the heating element adjacent it and so on, and the heating element being on the other edge of this plane is attached to the edgemost heating element on the lower plane and so on until a conductor 10 is arranged to transfer liquid medium back to the heat exchanger.
  • the liquid medium can be circulated in all heating elements. It is also possible to use the drying apparatus according to the invention in some other place, whereby it has some other, conventional heat source.
  • the drying apparatus includes between each plane 2-5 a blower device (not shown in the figures) and substitute air is conveyed to the drying apparatus from the heat exchanger in the boiler room of the heating plant or directly from the boiler room.
  • the drying apparatus also includes rotating devices 6 for rotating the heating elements.
  • the rotating devices are hydraulic rotating devices and each plane of heating elements has its own rotating device which is attached to the heating elements on the plane in question by bars 11 shown in Fig. 2.
  • the heating elements are first in their normal position according to Fig. 6 i.e. all of the ribs of the heating elements in the horizontal position. Material to be dried is fed from above the drying apparatus to the drying apparatus and spread evenly. Then, the material spreads mainly on top of the heating elements 2a, 2b and their ribs on the uppermost plane. The material being dried is kept for a desired time on this plane and heated on the plane e.g. until frozen material starts to thaw. At the next step, the heating elements 2, 2b of the uppermost plane are rotated into positions according to Figs. 7 and 8, whereby their ribs 9 rotate into positions at different steps.
  • the material being dried is possibly chopped into smaller bits and the material is able to drop on top of heating elements 3 on the lower plane.
  • the heating elements 2a, 2b on the upper plane are rotated back to their initial position.
  • the heating elements 3 on the second plane are rotated into a position according to Fig. 9, whereby the ribs are in the vertical direction and the material being dried is able to drop on top of heating elements 4 on the next lower plane.
  • the material being dried is kept for some time on this plane and dropped at the next step on top of heating elements 5 on the lowermost plane according to Fig. 10 and, lastly, on top of the lower plane of the drying apparatus.
  • the drying apparatus includes on each plane or between the planes a suction flow blower or an axial blower depending on at which end the blower is installed.
  • a suction flow blower or an axial blower depending on at which end the blower is installed.
  • suction pipes of the planes are combined to one suction blower unit and it is attached with a suction blower of adequate size (e.g. a radial blower) or with an axial blower to the output end. It is also possible to use other devices suitable for the purpose.
  • the drying apparatus includes sensors for monitoring the relative humidity of air.
  • the sensors are attached to a control unit of the blowers, which is arranged to monitor humidity and to control the power of the blower or blowers. The higher the humidity, the more the blower or blowers remove air from the drying apparatus.
  • the outgoing air is recirculated via the heat exchanger back to the boiler room of the heating plant or in some cases directly outside. It is also possible to control the blower or blowers manually.
  • the drying apparatus described in this embodiment and shown in the figures can dry various materials, such as wood and peat. It is particularly suitable for drying wood chips, but it can be used for drying other materials. For instance, wood chips can be dried for the raw material of briquets or pellets when a transfer conveyor has been constructed on the lowest plane or after it for individual taking. An alternative is to construct a drying unit of sawdust utilising lost heat in the vicinity of the heating plant. It is also possible to dry readily chopped chips in a separate drying apparatus.
  • the drying apparatus according to the invention can be employed in various conditions and attached to different sources of heat.
  • the drying apparatus according to the invention can be used for drying various materials. These materials are not limited in any way here.
  • the invention is not limited to the advantageous embodiment described, but it can vary within the scope of the inventive idea presented in the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un appareil de séchage servant à sécher un matériau, ledit appareil comprenant un corps (1) sur lequel sont fixés des éléments chauffants (2-5) qui sont installés dans le corps à distance les uns des autres, les éléments (2-5) étant fixés en couches entre lesquelles le matériau à sécher est placé pour être transféré, et un ou plusieurs dispositifs soufflants qui servent à évacuer l'air humide présent dans l'appareil de séchage. Selon l'invention, les côtés opposés des éléments chauffants (2-5) présentent des parties (9) s'étendant principalement perpendiculairement vers l'extérieur, l'appareil de séchage comprend un dispositif rotatif (6) assurant la rotation des éléments chauffants, et les parties (9) adjacentes d'éléments chauffants adjacents sont à proximité immédiate les unes des autres lorsque l'appareil de séchage est dans sa position normale.
EP20110828189 2010-09-30 2011-09-05 Appareil de sechage Withdrawn EP2622294A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20106014A FI122692B (fi) 2010-09-30 2010-09-30 Kuivauslaite
PCT/FI2011/050761 WO2012042099A1 (fr) 2010-09-30 2011-09-05 Appareil de séchage

Publications (2)

Publication Number Publication Date
EP2622294A1 true EP2622294A1 (fr) 2013-08-07
EP2622294A4 EP2622294A4 (fr) 2015-01-21

Family

ID=42829742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110828189 Withdrawn EP2622294A4 (fr) 2010-09-30 2011-09-05 Appareil de sechage

Country Status (3)

Country Link
EP (1) EP2622294A4 (fr)
FI (1) FI122692B (fr)
WO (1) WO2012042099A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012111892B4 (de) 2012-12-06 2016-04-28 Christoph Grabolle Vorrichtung zum Trocknen von Holz
CN106642998A (zh) * 2016-11-24 2017-05-10 安徽皖拓自动化有限公司 一种粮食烘干系统
NL1044066B1 (nl) * 2021-06-15 2022-12-21 Demmer Patent B V Productie van biopellets voor houtpelletketels/-installaties uit snoeihout en/of vergelijkbare houtige biomassa

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE406C (de) * 1877-09-10 HÜNERKOPF & SOHN in Nürnberg Mechanische Malzdarre mit eigenthümlicher Hordenbildung und kombinirter Hub- und Wendevorrichtung
US440262A (en) * 1890-11-11 grimm
GB191017740A (en) * 1910-07-26 1911-03-09 John Hines Improvements in Apparatus for Heating, Drying and otherwise Treating Stone and other Materials for use on Roads and like Surfaces.
US1355238A (en) * 1918-09-14 1920-10-12 Max F Mangelsdorff Drying-machine
US3986270A (en) * 1975-05-23 1976-10-19 Kyle Jr Henry E Apparatus for continuously drying separate charges of material while maintaining the charges separate

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302706C (fr) *
DE9582C (de) * 1879-08-24 1880-06-18 H. SCHÜCHTERMANN in Dortmund Neuerungen an Trockenapparaten
GB190930151A (en) * 1909-12-24 1910-08-04 Matthew Blake Improvements in and relating to the Driers of Kilns for the Revivification of Animal Charcoal and the like.
GB111112A (en) * 1914-03-24 1919-01-16 Technema Nv A Method of and Apparatus for Drying Goods, such as Wheat, Fruit, Vegetables or Fish.
GB128199A (en) * 1918-06-13 1919-10-02 Machf Brons Nv Method of, and Means for Drying Vegetables and the like.
DE1107599B (de) * 1955-03-24 1961-05-25 Rudolf H Rossmann Dipl Ing Schachttrockner fuer zerkleinerte Gruenpflanzen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US440262A (en) * 1890-11-11 grimm
DE406C (de) * 1877-09-10 HÜNERKOPF & SOHN in Nürnberg Mechanische Malzdarre mit eigenthümlicher Hordenbildung und kombinirter Hub- und Wendevorrichtung
GB191017740A (en) * 1910-07-26 1911-03-09 John Hines Improvements in Apparatus for Heating, Drying and otherwise Treating Stone and other Materials for use on Roads and like Surfaces.
US1355238A (en) * 1918-09-14 1920-10-12 Max F Mangelsdorff Drying-machine
US3986270A (en) * 1975-05-23 1976-10-19 Kyle Jr Henry E Apparatus for continuously drying separate charges of material while maintaining the charges separate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2012042099A1 *

Also Published As

Publication number Publication date
EP2622294A4 (fr) 2015-01-21
FI122692B (fi) 2012-05-31
FI20106014A (fi) 2012-03-31
WO2012042099A1 (fr) 2012-04-05
FI20106014A0 (fi) 2010-09-30

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