EP0163711A1 - Trockner zum trocknen von holzstämmen. - Google Patents
Trockner zum trocknen von holzstämmen.Info
- Publication number
- EP0163711A1 EP0163711A1 EP85900108A EP85900108A EP0163711A1 EP 0163711 A1 EP0163711 A1 EP 0163711A1 EP 85900108 A EP85900108 A EP 85900108A EP 85900108 A EP85900108 A EP 85900108A EP 0163711 A1 EP0163711 A1 EP 0163711A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drying
- control
- chamber
- timber
- dried
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/16—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by wheeled trucks
-
- 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
-
- 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
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/16—Wood, e.g. lumber, timber
Definitions
- the present invention concerns a procedure for controlling the operation of a drive-through chamber type timber drying kiln in which the timber loads to be dried are conveyed on a roller track or equivalent through a front door into a drying channel and from which the timber loads are after drying removed on the opposite side of the drying kiln through a back door, and in which two or more independently operating drying chambers have been connected in series so that when the timber loads are transferred from a preceding chamber to the next chamber, the drying process is continued in this chamber substantially onward from that point in the drying schedule which was reached in the preceding chamber.
- So-called drive-through chamber type drying kilns are known in prior art.
- the structure of these is such that drying kiln loads assembled of drying kiln packages are conveyed into a drying chamber on a roller track in front of them, whence the loads are pushed into the drying kiln chamber.
- the dried loads are taken out through the opposite door of the drying kiln chamber.
- These chamber-type drying kilns of prior art have the advantage that in them the load-changing time is relatively short.
- a drawback is, however, the expensive implementation of such drying kilns, because they require two opposed doors and roller tracks on both sides of the drying kiln chamber.
- This control arrangement known in the art involves the drawback that when the load to be dried is moved from one chamber to another the controller of this chamber must be re-programmed every time to conform to the drying schedule of each incoming load. This causes great need of programming, and/or the procedure leads to complicated and expensive control means.
- the object of the present invention is to avoid the drawbacks mentioned and to produce a new and a more advantageous control system in drive-through chamber type drying kilns.
- the invention is mainly characterized in that to control the operation of a group of drying kiln channels connected mutually in series has been provided a control system having as many control units as there are drying kiln chambers in said drying kiln chamber assembly, and
- control signal of said control unit is disposed to follow along with said timber load to be dried and to become connected in each instance to the controls or equivalent of that drying chamber in which the particular package to be dried resides at each moment.
- Fig. 1 presents in a schematical drawing, a drive-through chamber type drying kiln and the control system according to the invention controlling its operation.
- Fig. 2 shows the principle of the programme cycle selector switch belonging to the control system of the invention.
- Fig. 3 presents a principle example of a possible drying schedule to be followed in the drying kiln of the invention.
- the chamber-type drying kiln comprises three series-connected drive-through chamber-type drying kilns K 1 ,K 2 and
- K 2 and K 3 has a common front door 11, wherethrough the timber loads
- P 2 and P 3 pass through the drying chambers K 1 , K 2 and K 3 on their carts 15, the wheels 16 of which move on tracks 10 passing through the group of chambers. Between the drying chambers are placed movable partitions 12 and 13, which may be of rather low-weight construction.
- Fig. 1 are schematically shown the air circulation means by which the drying air is circulated in each chamber K through the timber package P to be dried, the temperature and/or humidity of this air being controlled by a control system according to the invention connected to the drying kiln.
- the said means for circulating the drying air have been quite schematically depicted in Fig. 1 and regarding a more detailed embodiment example reference is made to the Finnish patent application No. 831331 by the same applicant.
- On one side of and/or above each drying chamber K is disposed an air circulation duct 17, defined, as shown in Fig. 1, by a partition 18 and an upper wall 19.
- a blower 20 on the suction side of which intake air ducts 21 open into the channels 17 and through which fresh air (arrow F in ) is drawn to the drying air circulation.
- intake air ducts 21 open into the channels 17 and through which fresh air (arrow F in ) is drawn to the drying air circulation.
- exhaust air ducts not depicted.
- drying air heating radiators 25 the volumetric flow and/or temperature of the heating fluid circulating in them being controlled with a control valve 24.
- control dampers 22 in the intake air ducts 21 is controlled by control motors 23.
- control valve 24 of the heating radiator 25 is controlled with control motors 26.
- Each drying chamber K 1 ,K 2 and K 3 is provided with control means of its own for the intake air and drying air heating radiator 25.
- control system controlling the operation of the chamber-type drying kiln according to the invention depicted in Fig. 1, said control system comprising three separate control centres S 1 , S 2 and S 3 .
- the control centres S provide, in accordance with a programme entered in them in each instance in a manner known in itself in the art, a control signal a 1 ,a 2 and a 3 .
- Said control signals a 1 ,a 2 and a 3 are connected to a programme cycle selector switch means 30 which directs the control signals a 1 ,a 2 and a 3 each in turn to control the operation of the control motors 23,26 of the different chambers K 1 ,K 2 and K 3 of the drying kiln.
- the control system may, if required, include measuring means and feedback means, by which for instance the state of the drying air circulating in the different drying chambers K 1 ,K 2 ,K 3 is monitored and the control signals a 1 , a 2 and a 3 are accordingly influenced.
- the control signals a 1 ,a 2 ,a 3 may also be formed according to the "blind control" principle, in which case said measuring means and feedback arrangements are not needed.
- the straight line K represents the dry temperature t k of the drying air and the straight line M, the equivalent wet temperature t m .
- the horizontal axis T is the drying time and the vertical axis t, said drying air temperatures t k and t m in oC.
- the switch 31 of the selector means 30 is turned, or automatically caused to turn, so that the control signal a 1 now goes along with the timber package P 1 , that is, the control signal a, coming from the first control centre S 1 begins to control the operation of the second chamber K 2 with the aid of its control motors 23 and 26. It is thus understood that the drying process is continued following the drying schedules K and M in the second chamber K 2 as if no transfer had taken place regarding drying schedule and directing of the control means.
- the timber package P 1 has been moved from the first chamber K 1 to the second chamber K 2 and a new package has been introduced in the first chamber K 1 , and the control of this latter package's drying process is taken up, as shown in Fig. 2, by the control centre S 3 , which has just been released from controlling the drying of the package P 3 removed from the last chamber K 3 , the drying schedule implied by the new package having been programmed in the control centre S 3 .
- the drying process is carried out, as shown in Fig. 3, during the interval T 2 -T 1 to the dry temperature t 2k and the wet temperature t 2m , whereafter the package is moved to the next drying chamber K 3 and at the same time the selector switch 31 is stepped to its next position, in which the control signal a 1 of the control centre S 1 is directed to act on the control motors 23 and 26 of the third chamber K 3.
- drying of the same package is carried out during the interval T 3 -T 2 to the ultimate dry temperature t 3k and wet temperature t 3m under control by the same control centre S 1 under the control of which the drying process was commenced in the first chamber K 1 and carried out also in the second chamber K 2 .
- drying kilns in actual practice there are as a rule several drying kiln chamber groups K 1 - K N connected parallel. Each drying kiln chamber group K 1 - K N then has its own control system with as many (N) independently acting control units S 1 -S N as there are consecutive drying kiln chambers connected in series in the drying kiln chamber group controlled by it.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85900108T ATE33185T1 (de) | 1983-11-15 | 1984-11-14 | Trockner zum trocknen von holzstaemmen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI834185 | 1983-11-15 | ||
FI834185A FI78348C (fi) | 1983-11-15 | 1983-11-15 | Foerfarande foer reglering av funktionen av genomkoerbar kammartork foer traevirke. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0163711A1 true EP0163711A1 (de) | 1985-12-11 |
EP0163711B1 EP0163711B1 (de) | 1988-03-23 |
Family
ID=8518075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85900108A Expired EP0163711B1 (de) | 1983-11-15 | 1984-11-14 | Trockner zum trocknen von holzstämmen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0163711B1 (de) |
DE (1) | DE3470095D1 (de) |
FI (1) | FI78348C (de) |
WO (1) | WO1985002250A1 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4872270A (en) * | 1988-03-09 | 1989-10-10 | Eastman Kodak Company | Drying process |
FR2660424A1 (fr) * | 1990-04-03 | 1991-10-04 | Electricite De France | Procede et installation pour le sechage a grand debit de bois massif humide. |
TW416261B (en) * | 1997-04-24 | 2000-12-21 | Ciba Sc Holding Ag | Process and apparatus for the treatment of coated printed circuit boards |
AU9038701A (en) | 2000-09-25 | 2002-04-02 | Windsor Engineering Group Ltd | Timber drying kiln |
US7364091B2 (en) | 2003-12-19 | 2008-04-29 | Scientific Games International, Inc. | Embedded optical signatures in documents |
KR20070084102A (ko) | 2004-10-28 | 2007-08-24 | 사이언티픽 게임스 인터내셔널, 아이엔씨. | 가변적 포인트 값을 갖는 징표를 사용하여 기하학적도형상에서 플레이되는 로터리 게임 |
US7662038B2 (en) | 2005-01-07 | 2010-02-16 | Scientific Games International, Inc. | Multi-matrix lottery |
EP1861184A4 (de) | 2005-01-07 | 2009-05-13 | Scient Games Int Inc | Lotteriespiel mit nostalgischen spielthemen |
AU2006205010B2 (en) | 2005-01-11 | 2011-02-10 | Scientific Games Holdings Limited | On-line lottery game in which supplemental lottery-selected indicia are available for purchase |
US8262453B2 (en) | 2005-02-09 | 2012-09-11 | Scientific Games International, Inc. | Combination lottery and raffle game |
US7874902B2 (en) | 2005-03-23 | 2011-01-25 | Scientific Games International. Inc. | Computer-implemented simulated card game |
EP1874418A1 (de) | 2005-04-27 | 2008-01-09 | Scientific Games International, Inc. | Spielapparat |
US7654529B2 (en) | 2005-05-17 | 2010-02-02 | Scientific Games International, Inc. | Combination scratch ticket and on-line game ticket |
CN100455964C (zh) * | 2006-12-26 | 2009-01-28 | 大连中土畜富威格木业有限公司 | 地板涂装干燥输送设备及工艺 |
MY149935A (en) * | 2010-05-25 | 2013-10-31 | Forest Res Inst Malaysia | High-temperature lumber treatment system |
US8875414B2 (en) | 2013-03-15 | 2014-11-04 | Usnr, Llc | Unidirectional multi-path lumber kilns |
AU2014237510B2 (en) | 2013-03-15 | 2017-06-29 | Usnr, Llc | Multi-pass lumber kilns |
SE537903C2 (sv) * | 2013-04-08 | 2015-11-17 | Valutec Ab | Förfarande för torkning av trävirke med varmluft och en kanaltork |
DE102013006639A1 (de) * | 2013-04-18 | 2014-10-23 | Hildebrand Holztechnik Gmbh | Kanal-Trocknungsvorrichtung |
CN110617673A (zh) * | 2019-10-09 | 2019-12-27 | 南平市华泰木竹有限公司 | 一种高效保量单板干燥工艺方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE960259C (de) * | 1951-01-26 | 1957-03-21 | Konrad Wieser | Selbsttaetige Steuerungseinrichtung an Trocknern fuer Stapelholz |
FI34932A (fi) * | 1962-11-20 | 1965-03-10 | Gann App U Maschb G | Sätt och anordning för att torka trä på konstgjort sätt |
AT335918B (de) * | 1974-07-11 | 1977-04-12 | Vanicek Viktor | Trocknungsanlage, insbesondere trocknungskanal |
DE2524283A1 (de) * | 1975-05-31 | 1976-12-09 | Bollmann L Kg | Verfahren und vorrichtung zur holzfeuchtemessung und holztrocknung |
FI74136B (fi) * | 1983-04-19 | 1987-08-31 | Tekma Oy | Genomkoerbar kammartork foer virke. |
-
1983
- 1983-11-15 FI FI834185A patent/FI78348C/fi not_active IP Right Cessation
-
1984
- 1984-11-14 WO PCT/FI1984/000082 patent/WO1985002250A1/en active IP Right Grant
- 1984-11-14 DE DE8585900108T patent/DE3470095D1/de not_active Expired
- 1984-11-14 EP EP85900108A patent/EP0163711B1/de not_active Expired
Non-Patent Citations (1)
Title |
---|
See references of WO8502250A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0163711B1 (de) | 1988-03-23 |
DE3470095D1 (en) | 1988-04-28 |
WO1985002250A1 (en) | 1985-05-23 |
FI78348B (fi) | 1989-03-31 |
FI834185A (fi) | 1985-05-16 |
FI78348C (fi) | 1989-07-10 |
FI834185A0 (fi) | 1983-11-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0163711A1 (de) | Trockner zum trocknen von holzstämmen. | |
EP0122902B1 (de) | Holztrockenofen vom Durchgangskammertyp | |
US4424634A (en) | Modular column dryer for particulate material | |
US4423557A (en) | Gravity flow dryer for particulate material having channelized discharge | |
JPH11502459A (ja) | 放射対流併用加熱オーブン | |
US3149932A (en) | Drying kiln | |
US4398356A (en) | Multi-stage dryer for particulate material | |
US4711038A (en) | Run-through brick drying plant and method for the control of its operation | |
US2415738A (en) | Endless conveyor drier structure | |
US4402302A (en) | Air heating apparatus | |
EP0068734B1 (de) | Mehrstufentrockner für körniges Material mit kanalisierter Abführung | |
EP0245973A2 (de) | Trocknung von Tonwaren | |
US1319605A (en) | morton | |
FI84101C (fi) | Foerfarande foer att reglera funktionen av en genomkoerbar tegeltork. | |
JPH0798177A (ja) | 木材の乾燥装置 | |
JP3113570B2 (ja) | 穀物処理設備 | |
US410110A (en) | proctor | |
US487827A (en) | Process of drying brick | |
US2128698A (en) | Drying apparatus | |
US514406A (en) | Brick-drier | |
SU602755A1 (ru) | Установка дл сушки сыпучих материалов | |
US1255685A (en) | Drier. | |
SU962294A1 (ru) | Установка дл сушки солода | |
US434313A (en) | Brick-drier | |
SU1391579A1 (ru) | Установка дл сушки табака |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19850621 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
17Q | First examination report despatched |
Effective date: 19860820 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19880323 Ref country code: LI Effective date: 19880323 Ref country code: CH Effective date: 19880323 Ref country code: BE Effective date: 19880323 |
|
REF | Corresponds to: |
Ref document number: 33185 Country of ref document: AT Date of ref document: 19880415 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3470095 Country of ref document: DE Date of ref document: 19880428 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19881130 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19921027 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19921030 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19921125 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19930129 Year of fee payment: 9 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19931114 Ref country code: AT Effective date: 19931114 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19931114 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19940729 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19940802 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EAL | Se: european patent in force in sweden |
Ref document number: 85900108.3 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19951106 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19961115 |
|
EUG | Se: european patent has lapsed |
Ref document number: 85900108.3 |