EP0946340A1 - Procede pour stocker et conserver du bois vert rond ou scie - Google Patents

Procede pour stocker et conserver du bois vert rond ou scie

Info

Publication number
EP0946340A1
EP0946340A1 EP97952739A EP97952739A EP0946340A1 EP 0946340 A1 EP0946340 A1 EP 0946340A1 EP 97952739 A EP97952739 A EP 97952739A EP 97952739 A EP97952739 A EP 97952739A EP 0946340 A1 EP0946340 A1 EP 0946340A1
Authority
EP
European Patent Office
Prior art keywords
sawn timber
wood
film
double
storage
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
Application number
EP97952739A
Other languages
German (de)
English (en)
Other versions
EP0946340B1 (fr
Inventor
Gerold Mahler
Christoph Richter
Martin Gross
Andreas Weber
Thomas Maier
Jürgen König
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.)
Technische Universitaet Dresden
Original Assignee
Forstliche Versuchs- und Forschungsanstalt Baden-Wuerttemberg
Technische Universitaet Dresden
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 Forstliche Versuchs- und Forschungsanstalt Baden-Wuerttemberg, Technische Universitaet Dresden filed Critical Forstliche Versuchs- und Forschungsanstalt Baden-Wuerttemberg
Publication of EP0946340A1 publication Critical patent/EP0946340A1/fr
Application granted granted Critical
Publication of EP0946340B1 publication Critical patent/EP0946340B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/0095—Treating of wood not provided for in groups B27K1/00, B27K3/00 by employing wrappers

Definitions

  • the invention relates to a method for the preservative storage of fresh logs and fresh sawn timber, such as softwood and hardwood, for storage over long periods of time without loss of quality.
  • common general preservation methods preferably concern foods that are either sterilized with the exclusion of air and heating (boil down) or are gassed in the dry state with carbon dioxide (grain protection against grain beetle infestation) or treated with protective gases of a special composition (fruit storage and ripening under a nitrogen-carbon dioxide atmosphere ) or be cleaned of insects under pure nitrogen (restoration of wooden objects whose color pigments would be attacked by carbon dioxide).
  • the methods previously used to preserve fresh logs are based on water storage or sprinkling with water.
  • the aim is to maintain a high wood moisture content of over 100% so that fungus growth is prevented.
  • Disadvantages are the high water consumption and the groundwater contamination with wood constituents, combined with different moisture in the interior of the pile, with the possible consequence of fungal attack (Hallimasch).
  • insecticides and fungicides logs and sawn timber can be preserved temporarily. Pesticide use is associated with the risk to nature and humans.
  • a safe preservation option is the rapid processing and drying of the wood. This forces large cutting and drying reserves to be able to quickly process a large mass of logs (calamities, windthrow).
  • microbiological modification of hardwood by the action of microorganisms brings about a selective change in the hardwood, the temperature, the moisture content of the wood, the 0 2 content and the C0 2 content being regulated with regard to the microorganisms.
  • DE-OS 34 34 551 a specific color change is caused on logs by treatment with wood-destroying fungi. The color change occurs at the point where the mushroom culture was applied. It will also be the application described several wood cultures, which is associated with an advantageous boundary layer formation.
  • the invention has for its object to develop a method with which fresh log or fresh sawn timber of all tree types can be stored for a long period of time without impairing the quality and strength properties, without sterilizing, moistening, drying or using special protective gases must be treated.
  • This low oxygen content is achieved in that after the breathing processes customary in fruit storage, in which CO . , and H 2 0 is released and which have finished consuming 0 2 , another cycle begins. Fermentation processes take place in which additional C0 2 is released, so that the proportion of C0 2 can increase further.
  • the biotechnological process started after the air is closed can be accelerated by minimizing the air volume involved in the casing.
  • a housing advantageously a film with high diffusion resistance, is used to produce the air seal.
  • the film can be doubled to reduce the risk of leakage.
  • the advantage of a flexible cover is that the air volume can be reduced to a minimum (suction until the film tightly surrounds the surface of the log or sawn timber).
  • the air seal can also be achieved in specially prepared warehouses, containers, ship holds, lined pits, silos or mine tunnels.
  • the microorganisms After a short opening of the airtight casing for the removal of wood, the almost oxygen-free atmosphere is restored after a few days. Regardless of the time of year, the microorganisms are able to bring them back into their favorable condition.
  • C0 2 which is stored in the wood as a porous body and dissolved in the water bound in the wood, can be released again to produce a new gas balance.
  • the air is sealed off from the layered or long wood piles, and from valuable (veneer) the Individual protection, rationally achieved with a double weld seam on the enveloping film or by gluing, or by clamping the smoothly lying film webs with strips, around which the film is then wrapped tightly and secured with clamps against rewinding.
  • the main advantage of the method according to the invention is that the preservative storage does not require additional gassing.
  • Fig. 1 shows an arrangement with several round timbers welded or glued double foil wrapping.
  • 2 shows an arrangement with a round timber with welded or glued double foil wrapping.
  • 3 shows a clamp connection at the foil edges.
  • Fig. 4 shows a diagram showing the gas development
  • FIG. 5 is a diagram showing the bending strength in the
  • Double dual films were spread out on a flat surface and covered with 30 cbm of untreated spruce wood, diameter groups 15-25 cm.
  • Two measuring tubes were laid without pressure in the pile and fastened to the film with bulkhead screw connections. According to FIG. 1, the protruding film was then pulled over the pile and the two films - separately from one another - were welded with a double seam.
  • the oxygen content drops below 0.1%.
  • the carbon dioxide content levels out at around 40% (cf. FIG. 4).
  • After 24 months of storage there is no evidence of blueness, red streaking or Halli-mash infestation.
  • the flexural strengths measured according to DIN 52186 after storage are not lower than those of fresh comparative samples (cf. FIG. 5).
  • a maple veneer trunk with a center diameter of 35 cm and a length of 3 m is rolled up in double dual film.
  • a bulkhead screw connection is attached near the end faces of the trunk.
  • the foils are then welded twice. After 2 weeks there is an atmosphere a, which contains less than 0.1% oxygen and whose carbon dioxide content is up to 30%.
  • the wood is layered in airtight cargo holds, preferably filling the cargo space volume. Since the cargo holds can already be sealed watertight by bulkheads, the air seal only has to be made on the top by airtight or sealed hatches. In order to shorten the setting time, combustion gases from the ship's diesel are fed into the hold as initial gassing.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Storage Of Harvested Produce (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Mushroom Cultivation (AREA)

Abstract

Procédé pour stocker et conserver du bois vert rond ou scié emmagasiné dans une enveloppe hermétique étanche à l'air et à la lumière. L'oxygène se trouvant dans l'enveloppe est décomposé et forme du CO2 et H2O sous l'effet de processus de respiration de champignons, bactéries et cellules de bois encore vivantes. En outre, des processus de fermentation entraînent la décomposition d'hémicelluloses et de sucres qui sont convertis en acides organiques et en CO2. La teneur en oxygène dans l'enveloppe est inférieure à 0,1 % en volume après une durée d'entreposage comprise entre 3 et 10 jours, pendant la totalité de la durée de stockage et la teneur en CO2 augmente pour atteindre plus de 21 à 40 % en volume. Le procédé selon l'invention permet de stocker du bois vert rond ou scié sans perte ni pollution, sur une longue durée.
EP97952739A 1996-12-19 1997-12-19 Procede pour stocker et conserver du bois vert rond ou scie Expired - Lifetime EP0946340B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19652951 1996-12-19
DE19652951A DE19652951A1 (de) 1996-12-19 1996-12-19 Verfahren zur konservierenden Lagerung von frischem Rundholz
PCT/DE1997/002966 WO1998026907A1 (fr) 1996-12-19 1997-12-19 Procede pour stocker et conserver du bois vert rond ou scie

Publications (2)

Publication Number Publication Date
EP0946340A1 true EP0946340A1 (fr) 1999-10-06
EP0946340B1 EP0946340B1 (fr) 2001-11-14

Family

ID=7815313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97952739A Expired - Lifetime EP0946340B1 (fr) 1996-12-19 1997-12-19 Procede pour stocker et conserver du bois vert rond ou scie

Country Status (13)

Country Link
US (1) US6830727B1 (fr)
EP (1) EP0946340B1 (fr)
JP (1) JP2001506193A (fr)
CN (1) CN1081521C (fr)
AT (1) ATE208691T1 (fr)
CA (1) CA2274636C (fr)
CZ (1) CZ291309B6 (fr)
DE (2) DE19652951A1 (fr)
DK (1) DK0946340T3 (fr)
ES (1) ES2167807T3 (fr)
NZ (1) NZ336637A (fr)
RU (1) RU2177406C2 (fr)
WO (1) WO1998026907A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19652951A1 (de) 1996-12-19 1998-06-25 Univ Dresden Tech Verfahren zur konservierenden Lagerung von frischem Rundholz
FR2806953B1 (fr) * 2000-03-31 2002-06-21 Step Abri leger et procede pour le stockage et la conservation dans un environnement confine de grumes et/ou de bois scies
CN106965281B (zh) * 2017-04-10 2018-10-23 阜南佳利工艺品有限公司 一种提高杨树木板抗老化性能的处理方法
RU192914U1 (ru) * 2019-06-04 2019-10-07 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный лесотехнический университет" Штабель для хранения круглых лесоматериалов

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE267188C (fr) 1911-04-12
US2617202A (en) * 1949-08-15 1952-11-11 Earl L Reedy Process of curing and treating lumber
US3431061A (en) * 1963-10-11 1969-03-04 Union Bag Camp Paper Corp Preserving method for outdoor storage of wood used in paper manufacture
SE407758B (sv) 1977-10-04 1979-04-23 Enfors Sven Olof Forfarande for mikrobiologisk modifiering av lovtre genom inverkan av aeroba mikroorganismer
GB2093081A (en) * 1981-02-12 1982-08-25 Blacknell Buildings Ltd Impregnating timber
SE455477B (sv) 1983-09-20 1988-07-18 Hansson Goeran Forfarande for att bearbeta tre for att astadkomma zoneringar i treet med hjelp av svampar samt zonerat trematerial
DD267188A1 (de) * 1987-12-24 1989-04-26 Univ Dresden Tech Verfahren zur konservierung von holz
JPH0639811A (ja) * 1992-07-27 1994-02-15 Nippon Sanso Kk 木材の保存方法
US5363568A (en) * 1992-11-20 1994-11-15 Cornelia Textiles, Inc. Method of inhibiting lumber checking
US5447686A (en) * 1994-06-17 1995-09-05 Seidner; Marc A. Method for heat-treating wood and wood products
NZ280874A (en) * 1996-01-23 1997-08-22 Nz Forest Research Inst Ltd Prevention of sapstain in wood by applying a water barrier over the wood surface
US5718851A (en) * 1996-04-22 1998-02-17 Wadas, Jr.; Ronald M. Pile cap assembly and method
US5725613A (en) * 1996-07-08 1998-03-10 Hazen Research, Inc Method to reduce oxidative deterioration of bulk materials
US6063336A (en) * 1996-08-02 2000-05-16 Westward Corporation Method and apparatus for wood chip pasteurization
DE19652951A1 (de) 1996-12-19 1998-06-25 Univ Dresden Tech Verfahren zur konservierenden Lagerung von frischem Rundholz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9826907A1 *

Also Published As

Publication number Publication date
CA2274636A1 (fr) 1998-06-25
ATE208691T1 (de) 2001-11-15
CA2274636C (fr) 2007-01-30
CZ291309B6 (cs) 2003-01-15
RU2177406C2 (ru) 2001-12-27
DE19652951A1 (de) 1998-06-25
CN1081521C (zh) 2002-03-27
DE59705415D1 (de) 2001-12-20
NZ336637A (en) 2001-09-28
EP0946340B1 (fr) 2001-11-14
CN1244830A (zh) 2000-02-16
CZ225099A3 (cs) 2000-01-12
JP2001506193A (ja) 2001-05-15
WO1998026907A1 (fr) 1998-06-25
ES2167807T3 (es) 2002-05-16
US6830727B1 (en) 2004-12-14
DK0946340T3 (da) 2002-02-25

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