WO2005017251A1 - Procede de production de panneaux de fibres a partir d'une biomasse humide - Google Patents

Procede de production de panneaux de fibres a partir d'une biomasse humide Download PDF

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Publication number
WO2005017251A1
WO2005017251A1 PCT/CH2004/000521 CH2004000521W WO2005017251A1 WO 2005017251 A1 WO2005017251 A1 WO 2005017251A1 CH 2004000521 W CH2004000521 W CH 2004000521W WO 2005017251 A1 WO2005017251 A1 WO 2005017251A1
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WO
WIPO (PCT)
Prior art keywords
fiber bed
fibers
fiber
density
drying
Prior art date
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Ceased
Application number
PCT/CH2004/000521
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German (de)
English (en)
Inventor
Stefan Grass
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Individual
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Individual
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Publication date
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Publication of WO2005017251A1 publication Critical patent/WO2005017251A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard

Definitions

  • the present invention is in the field of processing moist biomass into industrially usable products, in particular for the production of fiberboard for the construction sector.
  • moist biomass encompasses vegetable material that is processed in the ' moist state. This includes monocotyledonous plants, in particular all types of grasses, including cereals which have been harvested moist (ie before ripening) such as wheat, barley, oats, rye and millet as well as sugar cane, millet and maize. Also included are broad-leaved plants such as alfalfa, clover and others, as well as products or residues from processing plants such as wood fibers or bagasse from the processing of sugar cane or millet.
  • the definition "moist” refers to a dry matter content of the biomass from 10-50%. The biomass can be processed fresh from the harvest, withered or temporarily stored (also ensiled).
  • fiberboard is used to summarize panels of different thicknesses and densities, which are used as insulation materials to protect against cold and heat or as mechanically resilient panels of higher density. To express the desired properties, these panels are sometimes made into 2 or 3-layer panels edited.
  • the production of boards of different thicknesses and densities from wood fibers has been an established industry worldwide for decades.
  • the treated raw material wood is treated with steam and the fibers are then ground in a refiner.
  • the plates are produced by placing the fibers in a non-dewatered state as an endless fleece on a screen belt, followed by dewatering, pressing and drying the plates.
  • the panel strength is due to the adhesive effect of the lignin contained in the raw material, which is heated above its softening point by the steam treatment and an adhesive effect when cooling or solidifying
  • the raw material is first described in Addition of organic solvents dissolved in a pulper, then further comminuted in a sealant pulper and a de-stipper, and then further delignified with the addition of ethanol or methanol, oxygen, anthraquinone and alkali •
  • WO 01/45523 describes a process for separating plant biomass in a liquid phase and a solid-containing phase with a fibrous consistency. The basis is the generation of a speed gradient in a flowing suspension. A macerator is described for carrying out the method.
  • the invention therefore has the following objects:
  • the method according to the invention therefore has the following steps: (a) raw material preparation and metering; (b) defibration of the raw material; (c) fiber removal and mechanical dewatering to 30-45% dry matter; (d) Plate making from the mechanically dewatered fibers.
  • the plate production follows the following procedure:
  • Page 3 e at least approximately complete opening of the fiber lumps after the mechanical dewatering; f) metering and mixing in of aggregates; g) formation of a fiber bed with a uniform layer thickness; h) pressing the fiber bed to a desired thickness or density; i) Uniform vapor deposition of the fiber bed until a temperature of over 60 ° C., preferably of 80-100 ° C., is reached over the entire cross section.
  • the method according to the invention thus has two sub-methods, namely
  • the device according to the invention comprises: a preferably rectangular frame (1) for receiving a fiber bed (2), the frame being able to be arranged above an air-permeable support means (3), a pressing device (8) for pressing the fiber bed (2) against the support means ( 3), the device having means for introducing steam (5,7) and means for introducing drying air (6,7) into the fiber bed and means for extracting steam or drying air (9,10) from the fiber bed (2) ,
  • insulation boards and building boards as well as non-woven fabrics can be produced.
  • Insulation boards have a lower density, for example 50-180 kg / m 3 , preferably 70-130 kg / m 3 .
  • Building boards have a higher density, for example 130-300 kg / m 3 , preferably 150-250 kg / m 3 .
  • the length and width of the panels are between 50 and 200 cm.
  • the thickness of the plates is between 30 and 200 mm. In a further processing step, these plates can also be used to produce, for example, 2- or 3-layer plates that are mechanically very robust.
  • FIG. 1 shows a block diagram of a process sequence according to the invention
  • FIG. 2 an apparatus for producing plates according to the invention.
  • the fibers are prepared and processed in accordance with the following procedure (cf. FIG. 1).
  • the specific information relates to the tested raw materials fresh grass, grass silage and corn silage.
  • the raw material is metered into a stirred storage tank and processed into a suspension of 0.5-2% (fresh grass, grass silage) or 3-7% dry matter (corn silage). This suspension is fed to a stripper.
  • De-strippers are used in many places in the fiber industry to dissolve fiber knots.
  • the raw material After one or more passes through a stripper, the raw material is sufficiently well separated with a fiber length of 5-50 mm.
  • Fig. 1 two deflashers connected in series are shown to illustrate this situation.
  • the fibers After fiber separation, the fibers are removed from the suspension and mechanically dewatered to a dry matter content of 30-50%.
  • the liquid phase is partly reused as process water and partly used for further use (e.g. biogas or ethanol production, animal feed).
  • the dewatered fiber lumps are broken up by a suitable device (e.g. impact mill, card, or a combination thereof).
  • the defibration can also be carried out by another method described in the literature.
  • the choice of another process may be necessary if the raw material is further lignified and if a purely mechanical pulping process does not result in satisfactory defibrillation.
  • One way of carrying out the method is to provide and process a mixture of fibers of different origins.
  • suitable for admixing to the fibers produced according to the invention are e.g. Wood fibers, other fibers of agricultural origin (e.g. flax fibers, hemp fibers, others) or other materials that are used for the production of insulation material.
  • additives are added (if necessary), which are mixed into the moist fiber material as dry powder and adhere directly and permanently there.
  • Suitable additives are substances which have a flame-retardant or a fungus-suppressing effect.
  • it can be substances that give the plate a specific expression, e.g. Additives that increase the strength of the panels and thus open up further application options.
  • clay powder, gypsum, boron-containing flame retardants, synthetic fibers, sodium nitrite, cellulose derivatives, starch and adhesives made therefrom, and others are suitable.
  • a frame 1 with the desired dimensions of length and width is filled uniformly with a predetermined mass of moist, open fibers, whereby a fiber bed 2 is created.
  • the frame has no floor, so that the fiber bed 2 comes to lie directly on an air-permeable support means 3 located under the frame.
  • a press plate 4 is installed above the frame 1 so that it can be sunk into the frame 1.
  • the press plate 4 is equipped with: • a connection 5 for the supply of steam • a connection 6 for the supply of drying air • recessed nozzles 7, which are evenly distributed over the entire contact surface of the plate 4 and with the supply of steam and drying air in one here
  • Connections or distribution lines not defined in more detail are • a pressing device 8, via which the fiber bed 2 is compressed and thus compressed to the desired plate thickness x.
  • Probes for pressure, temperature and flow measurement are for a targeted use of the
  • the press plate 4 can be specifically designed so that the steam dries before being introduced and thus the formation of condensate is prevented. Preventing condensation is desirable because the moisture content of the panel will facilitate subsequent processing
  • the material for the parts touching the product must be selected so that in the
  • the press plate 4 When the apparatus is operating, the press plate 4 is first set to the desired plate thickness x via the press device 8. Then 5 steam is in via the steam feed line
  • FIG. 1 is of course only a schematic representation of the facilities and processes according to the invention.
  • drying with air can become obsolete if there is sufficient vaporization and sufficient ventilation.
  • Media supply and discharge can just as easily be implemented in reverse as shown in Fig. 1 (i.e. supply of steam and air from below).
  • the process steps "vapor deposition” and “drying” can equally well take place in two separate apparatuses, the drying e.g. can also be supported by the use of microwaves.
  • the above principle can also be implemented as a continuous plate line.
  • the fibers made from corn silage also contain bast that has broken down into fine particles and fragments of the spindles. This material is mainly because of these accompanying substances in the present form for the production of light insulation boards much less suitable than grass fibers. A separation of fine material, fibers and fragments, e.g. by means of airflow sieving, will significantly improve the usability of the fiber fraction for plate production.
  • the fibers made from millet also contain decaying bast with a relatively small grain diameter. A separation from the bast is advisable for the use of these fibers.
  • Page 9 c The effort for drying the plates with air is significantly reduced by the described method. This reduction results on the one hand from the fact that water vapor-saturated air and condensate are drawn off from the plate during the steaming and the moisture content of the plate drops in the course of the steaming. On the other hand, the vaporization results in an increase in the temperature of the fiber material and the moisture contained therein to 80-100 ° C. and thus a reduction in the heat of vaporization to be used for drying. It is conceivable that after steaming, no further drying of the fibers with air is necessary.
  • the described method can be implemented in batch operation or in continuous operation.
  • the plates are shaped before the plate is stamped and dried.
  • the manufacturing units are inexpensive and can be supplemented with additional units as the product demand increases.
  • the implementation of the process in a continuously operated plate line is advantageous for larger to large production capacities.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

L'invention concerne un procédé de production de panneaux de fibres à partir d'une biomasse humide, ce procédé comprenant les étapes suivantes : (a) préparation de la matière première et broyage et (b) production de panneaux à partir des fibres végétales. Ce procédé se caractérise en ce que les panneaux sont produits selon la procédure suivante : b1) ouverture au moins quasi totale des mottes de fibres, b2) formation d'un lit de fibres présentant une épaisseur de couche homogène, b3) compression de ce lit de fibres de façon à obtenir une épaisseur ou une densité voulue, b4) traitement homogène du lit de fibres à la vapeur jusqu'à obtention d'une température supérieure à 60 DEG C, de préférence à 80 DEG C sur toute la section. Ce procédé est adapté à la production de panneaux isolants présentant une densité comprise entre 50 et 180 kg/m<3> et de panneaux muraux présentant une densité comprise entre 130 et 300 kg/m<3>. Ce procédé est avantageux en ce qu'il permet de produire des panneaux isolants à stabilité mécanique présentant une faible densité et d'économiser de l'énergie de séchage. Ces avantages sont obtenus en particulier grâce au traitement à la vapeur susmentionné.
PCT/CH2004/000521 2003-08-18 2004-08-17 Procede de production de panneaux de fibres a partir d'une biomasse humide Ceased WO2005017251A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14062003 2003-08-18
CH1406/03 2003-08-18

Publications (1)

Publication Number Publication Date
WO2005017251A1 true WO2005017251A1 (fr) 2005-02-24

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PCT/CH2004/000521 Ceased WO2005017251A1 (fr) 2003-08-18 2004-08-17 Procede de production de panneaux de fibres a partir d'une biomasse humide

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008116340A1 (fr) 2007-03-26 2008-10-02 Stefan Grass Production d'éléments non tissés en fibres naturelles
DE102011010192A1 (de) * 2011-02-02 2012-08-02 Biowert Ag Verfahren zur Bereitstellung und Aufbereitung von Naturfasern
DE102011010140A1 (de) * 2011-02-02 2012-08-02 Biowert Ag Verfahren zur Bereitstellung und Aufbereitung von Naturfasern
WO2015011066A1 (fr) * 2013-07-26 2015-01-29 Philippe Saint Ger Ag Procédé de production de produits moulés
WO2021229107A1 (fr) 2020-05-15 2021-11-18 Omalley George Procédé de production d'un produit de fibres d'herbe non tissé

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1728258A (en) * 1928-11-23 1929-09-17 Albert D Stewart Process for preparing cereal-straw fiber for the manufacture of relatively-thick fibrous sheets therefrom
US5611882A (en) * 1993-08-11 1997-03-18 Phenix Biocomposites, Inc. Board stock and method of manufacture from recycled paper
DE19732077A1 (de) * 1997-07-25 1999-01-28 Boettcher Silvio Verfahren zur Behandlung und Verarbeitung von nachwachsenden Rohstoffen
US6207196B1 (en) * 1998-09-24 2001-03-27 Societe Cooperative Agricole Vivadour Vegetable base material from cereal plants and process for obtaining the same
DE20023097U1 (de) * 1999-08-30 2003-01-09 Unique Company Ltd., Ichikawa, Chiba Recycling-Holzwerkstoffe aus Altpapier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1728258A (en) * 1928-11-23 1929-09-17 Albert D Stewart Process for preparing cereal-straw fiber for the manufacture of relatively-thick fibrous sheets therefrom
US5611882A (en) * 1993-08-11 1997-03-18 Phenix Biocomposites, Inc. Board stock and method of manufacture from recycled paper
DE19732077A1 (de) * 1997-07-25 1999-01-28 Boettcher Silvio Verfahren zur Behandlung und Verarbeitung von nachwachsenden Rohstoffen
US6207196B1 (en) * 1998-09-24 2001-03-27 Societe Cooperative Agricole Vivadour Vegetable base material from cereal plants and process for obtaining the same
DE20023097U1 (de) * 1999-08-30 2003-01-09 Unique Company Ltd., Ichikawa, Chiba Recycling-Holzwerkstoffe aus Altpapier

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008116340A1 (fr) 2007-03-26 2008-10-02 Stefan Grass Production d'éléments non tissés en fibres naturelles
US8110070B2 (en) 2007-03-26 2012-02-07 Stefan Grass Production of non-woven elements made of natural fibres
DE102011010192A1 (de) * 2011-02-02 2012-08-02 Biowert Ag Verfahren zur Bereitstellung und Aufbereitung von Naturfasern
DE102011010140A1 (de) * 2011-02-02 2012-08-02 Biowert Ag Verfahren zur Bereitstellung und Aufbereitung von Naturfasern
DE102011010140A8 (de) * 2011-02-02 2012-10-04 Biowert Ag Verfahren zur Bereitstellung und Aufbereitung von Naturfasern
US9163357B2 (en) 2011-02-02 2015-10-20 Biowert Ag Process for providing and processing natural fibres
DE102011010192B4 (de) * 2011-02-02 2016-06-16 Biowert Ag Verfahren zur Bereitstellung und Aufbereitung von Naturfasern und deren Verwendung zur Herstellung von faserverstärktem Kunststoffmaterial und Dämmmaterial
DE102011010140B4 (de) * 2011-02-02 2016-06-16 Biowert Ag Verfahren zur Bereitstellung und Aufbereitung von Naturfasern und deren Verwendung zur Herstellung von faserverstärktem Kunststoffmaterial und Dämmmaterial
WO2015011066A1 (fr) * 2013-07-26 2015-01-29 Philippe Saint Ger Ag Procédé de production de produits moulés
CH708398A1 (de) * 2013-07-26 2015-01-30 Philippe Saint Ger Ag Verfahren zur Herstellung von geformten Produkten.
WO2021229107A1 (fr) 2020-05-15 2021-11-18 Omalley George Procédé de production d'un produit de fibres d'herbe non tissé

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