CN1275750C - Dry method for preparing cotton stalk fibrous board - Google Patents
Dry method for preparing cotton stalk fibrous board Download PDFInfo
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- CN1275750C CN1275750C CN 03132561 CN03132561A CN1275750C CN 1275750 C CN1275750 C CN 1275750C CN 03132561 CN03132561 CN 03132561 CN 03132561 A CN03132561 A CN 03132561A CN 1275750 C CN1275750 C CN 1275750C
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- cotton stalk
- glue
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Abstract
The present invention provides a method for preparing cotton stalk fibreboards in a dry way, which relates to a method for preparing fibreboards in a dry way by using cotton stalk as raw materials. At present, a large amount of water needs to be drained in the process of producing the fibreboards by a wet method, and waste water treatment has high cost and is not favorable for environmental protection. The preparation of the present invention comprises the following orderly steps of section making, preheating, boiling, pulp milling, gluing, drying, laying, hot pressing, sawing and sanding. The present invention overcomes the difficulty of the caking fiber of cotton stalk shaving boards, and prepared fibreboards have high intensity. The fibreboards prepared by the method can be produced in a dry way without draining waste water, and the fibreboards can be produced by enterprises. The present invention also overcomes the difficulty of peeling cotton stalk, production can be carried out with peeling the cotton stalk, a peeling step is omitted, and simultaneously, the utilization ratio of the cotton stalk is increased by more than 20 %. The present invention as a method having the advantages of easy operation and environmental protection step saving can increase the utilization ratio of raw materials and is suitable for generalization and application, and agricultural waste materials can be used for producing the fibreboards.
Description
Technical field: the present invention relates to a kind of preparation method of fiberboard, particularly a kind of is the method for raw material with the dry process fiberboard with cotton stalk.
Background technology: with timber is raw material producd fibers plate, history has for a long time been arranged, and what at home and abroad generally use is the hardboard and the softboard of wet production.But the wet production fiberboard will discharge a large amount of waste water, because enterprise's production scale is limit, cost for wastewater treatment is too high; under the more and more tighter situation of environmental protection requirement; use the dry production wood-fiber board, grown up, the ratio of wet production fiberboard is more and more littler.Domestic almost whole in recent ten years new production line all adopts dry production.Leading products are timber medium density fibre board (MDF)s, are density board on the market.Along with the development that the floor produces, the output of timber high-density plate is in development.Utilize cotton stalk to produce wood-based plate research, existing more than 20 year history, domestic a plurality of units are to the histological structure of cotton stalk, chemical composition has been done relatively scrutiny, cotton stalk particieboard manufacturing process is also had many achievements in research, and specifically, goal in research is to make particieboard with cotton stalk.Because the characteristics of cotton stalk are that the outside of stalk is by fibrous cotton stalk skin, cotton stalk skin is difficult to divest with machinery, on cotton stalk, also have some blue or green bells simultaneously, smash in the operation at cotton stalk, cotton fiber after cotton stalk hide fiber and blue or green bell are smashed, all be mingled in the cotton stalk particle, such particle is constantly entering drying process and applying glue operation in the motion, fiber twines mutually at the volley, become many comas that differ in size, during applying glue, glue can only be applied to the coma surface, and not gluing is executed in the inside of coma, coma that these are sized and cotton stalk particle are paved into slab together, be hot pressed into particieboard, the bond strength of such particieboard inside is very poor, does not reach the particieboard national standard.So,, remove blue or green bell and cotton stalk skin is a technical barrier if make particieboard with cotton stalk.Once the someone tried to divest cotton stalk skin with multiple mechanical means, and attempted to remove most of blue or green cotton boll simultaneously in peeling, and effect all can not be satisfactory as a result.The blue or green bell of manual excision is bothersome, and plucks endless.The fiber equipment that removes when also the someone attempts to adopt similar manufacturing shive plate is removed the fiber in the cotton stalk particle, does not also succeed.During the last ten years, domestic one tame enterprise finally fails to produce cotton stalk particieboard equally from the famous large-scale cotton stalk Flakeboard Product Line of instrument factory import one cover of a family Germany.Subsequently, domestic have some units to study wet method cotton stalk fiber board production technologies, and indivedual factories carry out experimental production after a while, and are the same with the timber wet-process fiber board, because waste water handling problem has also all stopped production.
Summary of the invention: the object of the present invention is to provide a kind of can be raw material with the cotton stalk of not peeling, and with the method for dry process fiberboard, its preparation process is followed successively by: a. system section: after getting cotton stalk raw material dust removal soil sandstone, be cut into the section that length is 5～25mm; B. preheating boiling: cotton stalk section is put into the cooker boiling make it softening, the feed auger compression ratio of cooker is greater than 2.5; C. defibrination: the cotton stalk section after will softening is worn into fibre stuff; Described defibrination process is the defibrator process process: make cotton stalk section after softening enter the defibrator defibrator process and become fibre stuff, the feed auger compression ratio of defibrator is between 2.5～4; D. applying glue and drying: make fibre stuff enter dry after dryer sizing in the drying machine, perhaps give to enter in the drying machine after the fibre stuff applying glue dryly again, resin added is 4%～15%, and the moisture content of dry back fiber is 3～12%; E. mat formation: applying glue and dried fiber are paved into slab; F. hot pressing: slab is sent into the hot press interior heat press, hot pressing pressure is 2.5～6.5MPa, and hot pressing temperature is 150～210 ℃, and hot pressing time is 1～35s/mm thickness of slab, gets fiber laminin plate; G. saw cuts and sanding: with fiber laminin plate jagsaw cut with sanding after promptly get stock for fibreboard.The present invention has overcome the difficulty of fibrous caking in the cotton stalk particieboard, prepared fiberboard intensity height, can be up to state standards fully, also overcome the difficulty of wet method cotton stalk fiber plate wastewater treatment, use the inventive method to prepare fiberboard and do not need waste discharge, can produce with dry method, make enterprise's producd fibers plate have feasibility, it has also overcome the difficulty of cotton stalk peeling, cotton not peeling of stalk just can be produced, and has saved the peeling operation, and the utilization rate of cotton stalk has been improved more than 20%, the present invention is a kind of processing ease, environmental protection, save operation, improve raw material availability, with the practicable method of agricultural residue producd fibers plate, suitable applying.
The specific embodiment one: the preparation process of present embodiment is followed successively by: a. system section: after getting cotton stalk raw material dust removal soil sandstone, be cut into the section that length is 5～25mm; B. preheating boiling: cotton stalk section is put into the cooker boiling make it softening, the feed auger compression ratio of cooker is greater than 2.5; C. defibrination: the cotton stalk section after will softening is worn into fibre stuff; D. applying glue and drying: make fibre stuff enter dry after dryer sizing in the drying machine, enter drying in the drying machine again after perhaps giving the fibre stuff applying glue, resin added is 4%～15%, and the resin added among the present invention is meant the ratio of over dry glue and bone dry fiber weight, and the moisture content of dry back fiber is 3～12%; E. mat formation: applying glue and dried fiber are paved into slab; F. hot pressing: slab is sent into the hot press interior heat press, hot pressing pressure is 2.5～6.5MPa, and hot pressing temperature is 150～210 ℃, and hot pressing time is 1～35s/mm thickness of slab, gets fiber laminin plate; G. saw cuts and sanding: with fiber laminin plate jagsaw cut with sanding after promptly get stock for fibreboard.
The specific embodiment two: the preparation process of present embodiment is followed successively by: a. system section: after getting cotton stalk raw material dust removal soil sandstone, be cut into the section that length is 5～25mm, selected cotton stalk raw material is the cotton stalk of having removed root, can having had some blue or green bells; B. peeling: generally, cotton stalk section is without peeling, because not peeling can not influence the manufacturing of fiberboard, also can not influence the performance of fiberboard, and can improve the utilization rate of cotton stalk section, because cotton stalk skin accounts for about 1/4 of whole cotton stalk, but can peeling when specific (special) requirements is arranged, when adjusting the color of fiberboard, can select to peel off some skins more as required and still peel off some skins less such as needs; C. clean cotton stalk section: at first be flush away dust sandstone and metal, in order to avoid damage defibrator mill and reduction fiberboard quality, next is to make cotton stalk section absorb moisture, and the moisture content that improves cotton stalk section helps preheating boiling and defibrator process, and the water of washing cotton stalk section can recycle through post precipitation; D. preheating: the cotton stalk section after will cleaning is put into the feed bin preheating, and preheating can be increased in the effect of preheating boiling in the cooker in feed bin; E. preheating boiling: cotton stalk section is put into the cooker boiling make it softening, the purpose of preheating boiling is softening cotton stalk section, and the feed auger compression ratio of cooker is greater than 2.5, because the only about 100～110kg/m of the heaping weight of cotton stalk section
3F. defibrator process: the cotton stalk section after boiling is softening enters defibrator, at high temperature the defibrator process of cotton stalk section is become fibre stuff, and the feed auger compression ratio of defibrator is between 2.5～4; G. applying glue and drying: the fibre stuff that mill has been got well in defibrator, spray by grout outlet, enter in the drying machine dry, applying glue then, also can give the fibre stuff applying glue in the grout outlet before entering drying machine, and then enter in the drying machine dry, the glue that applies is urea-formaldehyde glue, phenol glue, melamine glue or isocyanate glue, the perhaps epoxy glue of these several glue, resin added is 4%～15%, resin added is meant the ratio of over dry glue and bone dry fiber weight, and the moisture content of dry back fiber is 3～12%; H. mat formation: applying glue and dried fiber are paved into slab, and follow-up hot press is step in this way, slab will block by the hot plate size, and hot press is continous way in this way, and continuous slab need not block; I. precompressed: slab enters preformer, can apply different pressure according to the difference of slab thickness and carry out precompressed; J. hot pressing: slab is sent into the hot press interior heat press, hot pressing pressure is 2.5～6.5MPa, and hot pressing temperature is 150～210 ℃, hot pressing time is decided by the thickness and the density of cotton stalk fiber plate, be generally 1～35s/mm thickness of slab, after hot pressing is finished, draw off fiber laminin plate from hot press; K. saw cuts and sanding: with fiber laminin plate jagsaw cut with sanding after promptly get the cotton stalk fiber board finished product, can first sanding after saw cut, also can saw earlier and cut a back sanding, can also earlier pre-sanding, saw section and sanding again.
Claims (7)
1, a kind of method of dry process cotton stalk fiber plate is characterized in that its preparation process is followed successively by: a. system section: after getting cotton stalk raw material dust removal soil sandstone, be cut into the section that length is 5～25mm; B. preheating boiling: cotton stalk section is put into the cooker boiling make it softening, the feed auger compression ratio of cooker is greater than 2.5; C. defibrination: the cotton stalk section after will softening is worn into fibre stuff; Described defibrination process is the defibrator process process: make cotton stalk section after softening enter the defibrator defibrator process and become fibre stuff, the feed auger compression ratio of defibrator is between 2.5～4; D. applying glue and drying: make fibre stuff enter dry after dryer sizing in the drying machine, perhaps give to enter in the drying machine after the fibre stuff applying glue dryly again, resin added is 4%～15%, and the moisture content of dry back fiber is 3～12%; E. mat formation: applying glue and dried fiber are paved into slab; F. hot pressing: slab is sent into the hot press interior heat press, hot pressing pressure is 2.5～6.5MPa, and hot pressing temperature is 150～210 ℃, and hot pressing time is 1～35s/mm thickness of slab, gets fiber laminin plate; G. saw cuts and sanding: with fiber laminin plate jagsaw cut with sanding after promptly get stock for fibreboard.
2, the method for dry process cotton stalk fiber plate according to claim 1 is characterized in that adding the peeling process before the preheating digestion process.
3, the method for dry process cotton stalk fiber plate according to claim 1 is characterized in that adding between system section process and preheating digestion process and cleans cotton stalk section process, flush away dust sandstone and metal.
4, the method for dry process cotton stalk fiber plate according to claim 1, warm before it is characterized in that before the preheating digestion process, increasing, this process is preheating in feed bin.
5, the method for dry process cotton stalk fiber plate according to claim 1 is characterized in that adding the precompressed process between pavement process and hot pressing.
6, the method for dry process cotton stalk fiber plate according to claim 1 is characterized in that cotton stalk raw material is the cotton stalk of having removed root, can having had some blue or green bells.
7, the method for dry process cotton stalk fiber plate according to claim 1 is characterized in that the glue that applies in applying glue and the dry run is urea-formaldehyde glue, phenol glue, melamine glue or isocyanate glue, perhaps the epoxy glue of these several glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03132561 CN1275750C (en) | 2003-08-11 | 2003-08-11 | Dry method for preparing cotton stalk fibrous board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03132561 CN1275750C (en) | 2003-08-11 | 2003-08-11 | Dry method for preparing cotton stalk fibrous board |
Publications (2)
| Publication Number | Publication Date |
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| CN1473690A CN1473690A (en) | 2004-02-11 |
| CN1275750C true CN1275750C (en) | 2006-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03132561 Expired - Fee Related CN1275750C (en) | 2003-08-11 | 2003-08-11 | Dry method for preparing cotton stalk fibrous board |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429057C (en) * | 2007-04-28 | 2008-10-29 | 南京林业大学 | Method for manufacturing fiberboard of cotton stalk in middle density through dry process |
| CN101544010B (en) * | 2009-05-11 | 2012-09-12 | 姜景文 | Cotton stalk artificial boards and its production method |
| CN101954664A (en) * | 2010-06-04 | 2011-01-26 | 沈阳巴菲克实业有限公司 | Black grey carbon fiber environmentally-friendly middle-high density fiberboard and manufacturing process thereof |
| CN104057532A (en) * | 2013-03-23 | 2014-09-24 | 合肥安诺新型建材有限公司 | Manufacturing method for environmentally-friendly high-strength crop straw boards |
| CN104441193A (en) * | 2013-09-22 | 2015-03-25 | 山东海州实业有限公司 | Synthetic method for cotton stalk density board |
| CN104526832A (en) * | 2014-12-16 | 2015-04-22 | 上海振森木业机械有限公司 | Method for manufacturing high-density fiber board by crop straws |
| CN105235046B (en) * | 2015-09-21 | 2017-11-10 | 昆明理工大学 | A kind of method with cow dung dry process fiberboard |
| CN107234703B (en) * | 2017-05-15 | 2020-12-22 | 华南理工大学 | High-performance fiberboard based on recycling of waste cotton textiles and preparation method thereof |
| CN110962205A (en) * | 2018-09-30 | 2020-04-07 | 长沙汉创新材料科技有限公司 | Cotton stalk-based density fiberboard production process, density fiberboard and packing box |
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- 2003-08-11 CN CN 03132561 patent/CN1275750C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1473690A (en) | 2004-02-11 |
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