CN108481509A - The preparation method of stalk fiber board - Google Patents
The preparation method of stalk fiber board Download PDFInfo
- Publication number
- CN108481509A CN108481509A CN201810301742.6A CN201810301742A CN108481509A CN 108481509 A CN108481509 A CN 108481509A CN 201810301742 A CN201810301742 A CN 201810301742A CN 108481509 A CN108481509 A CN 108481509A
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- Prior art keywords
- steam
- stalk
- explosion
- preparation
- fiber board
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- 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
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/36—Explosive disintegration by sudden pressure reduction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
Abstract
The preparation method of stalk fiber board provided by the invention, step include：85~90% stalk and 10~15% lignin are chosen by mass percentage；Stalk is transported in steam-explosion jar, steam-explosion jar feed inlet valve is closed, steam is passed through in steam-explosion jar and so that steam explosion pressure inside the tank is 1.2~1.8MPa, the heat-insulation pressure keeping time is 5~10min, then moment opens steam-explosion jar discharge valve so that in material abrupt release to steam explosion jetting storehouse；By after steam explosion material and lignin mix after carry out defibrator process, carry out pneumatic conveying drying after defibrator process, the hot air temperature of pneumatic conveying drying is 160~180 DEG C, it is dry after mixed material moisture be 8~12%；Mixed material after drying is subjected to molding of mating formation.The effects that present invention is using polymerization of the substance and lignin generated during steam explosion in hot pressing, polycondensation, is molded through hot-press solidifying, does not use urea-formaldehyde resin adhesive, burst size of methanal zero；It not only solves the problem that rural area crop straw burning causes atmosphere pollution, and energy saving cost of material, then reduces plank price.
Description
Technical field
The invention belongs to plank preparation method field, more particularly to a kind of preparation method of stalk fiber board.
Background technology
Due to the frequent economic activity of the mankind, a large amount of soils, the deforestation reclamation of wasteland, non-causative fault are occupied so that many countries
The forest reserves face the degradation of quality and quantity, meanwhile, the variation of earth environment, the rapid expansion of population and Forest Fire
The influence of the factors such as calamity, all makes the forest reserves drastically reduce, and multiple countries put into effect the laws and regulations that forest taboo is adopted successively in recent years, make
The shortage for obtaining timber is further exacerbated by.With the continuous development of society, as the wood-based plate yield of the substitute of Wood products and
Sales volume rises rapidly.
Conventional artificial's board industry is disappeared using a kind of plank, this plank made of a variety of wood materials and based Wood Adhesives gluing
A large amount of wood materials of consumption are the slow-growing limited forest reserves of nature, excessive to cut down the limited forest reserves, are caused
Very big destruction to the entire ecosystem leads to soil erosion, mud-rock flow, land resource salinization of soil, aggravates global greenhouse effect
Generation.Forest resourceies growth cycle is long, and lumber recovery is low, and one needs the period of tens or even centuries towards the forest resourceies of felling
It could restore.As country adopts the limit of the forest reserves, prohibits and adopts the implementation of order, most of forest zone can be adopted in no forest tree resource
Difficult situation.
Lignocellulosic is renewable resource most abundant on the earth, passes through the plant cellulose that photosynthesis generates every year
About 100,000,000,000 tons.From the point of view of at this stage, most area relies on stalk as fuel, or is directly burned in field, no
Environment is only polluted, and since the utilization rate of straw burning energy is low, causes the serious waste of resource.Utilize agricultural wastes
Make raw material production straw fiber board have no soda acid steam explosion, molding of mating formation, hot-forming, equipment simply, low energy consumption, environmental-friendly
The features such as.Not only can the agricultural wastes such as a large amount of conversion of biomass, but also atmosphere pollution can be alleviated, improve ecological ring
Border promotes agricultural sustainable development, drives agriculture industrialization and benign ecological cycles.Lignocellulosic becomes straw fiber board
Produce most potential raw material.
With the development of modern industry and the surge of world population, energy crisis, crisis in food, environmental crisis day are increasingly
It is acute.World economy is too dependent on the fossil resources such as oil, coal, non-renewable just to cause such resource gradually withered
It exhausts, and price is climbing up and up, such resource of burning generates gases and the suspended particulates such as a large amount of carbon dioxide, sulfur dioxide
Object has resulted in the worsening of climatic environment.It finds reproducible clean energy resource and substitutes them as the concern of scientific research department of various countries
Focus.Wherein biomass energy because with derive from a wealth of sources, that cheap, recyclability is strong, carbon dioxide is Ke Xunhuanliyong etc. is excellent
Point becomes most potential energy substance.Ethyl alcohol has been attached great importance as regenerative resource, currently, the life of alcohol fuel
Production is mainly using grains such as sugarcane, cereal as raw material, but population expansion, food shortage determine this raw material production alcohol fuel
Limitation.Cellulosic ethanol is derived from the important energy source of renewable biomass.To avoid striving grain with people, striving ground, wooden fibre with grain
Dimension element is as the most potential raw material of the production of cellulosic ethanol.From the point of view of at this stage, most area is by stalk as combustion
Material, or directly burned in field, Air haze is caused, environment is not only polluted but also the traffic such as highway, civil aviaton is transported
Defeated industry causes to seriously affect, and since the utilization rate of straw burning energy is low, causes the serious waste of resource.It is useless using agricultural
Gurry make raw material cellulose ethyl alcohol with no soda acid steam explosion, enzyme hydrolysis process mild condition, equipment is simple, low energy consumption, ring
The features such as border is friendly.Not only can a large amount of conversion of biomass energy, alleviating energy crisis, but also air dirt can be alleviated
Dye improves the ecological environment, promotes agricultural sustainable development, drives agriculture industrialization and benign ecological cycles.Last remaining slag
Material is lignin, since lignin is natural high molecular substance, petroleum chemicals productive target can be replaced to have in many fields
Machine product.
Medium density fibre board (MDF) (medium density fiberboard abridge MDF) is one kind using wood fibre as raw material,
And using resin as adhesive, paraffin be waterproofing agent through chipping, fiber separation, the processes such as molding and hot pressing of mating formation, manufacture
Made of density be 450-880kg/m3Artificial board.
Disadvantage one：Since medium density fibre board (MDF) is raw material using wood fibre, a large amount of forest reserves are consumed.The forest reserves
It is limited, the slow natural resources of reproducibility.
Disadvantage two：Since medium density fibre board (MDF) is to pass through adding liquid gluing using tiny wood fibre and wood particulate
A kind of plank made of agent hot pressing.Water absorption rate is high, and easily expansion, modification, intensity are relatively low after water suction.
Disadvantage three：Since medium density fibre board (MDF) has used the adhesives such as Lauxite, the Form aldehyde release period of finished product plank
Up to the more than ten years, and burst size of methanal is higher, and formaldehyde is confirmed as 1 class carcinogenic substance, and the main harm of formaldehyde is shown as to skin
The stimulation of mucous membrane, when formaldehyde reaches a certain concentration indoors, people just has sense of discomfort.Newly-decorated room content of formaldehyde compared with
Height is the main inducing of numerous diseases.
Invention content
The object of the present invention is to provide a kind of preparation method of stalk fiber board, solve existing wood fibre board there is
The waste forest reserves, water absorption rate it is high, the problems such as easily expansion, modification after water suction, intensity is relatively low, content of formaldehyde is high.
The problem of for being previously mentioned, the present invention provides a kind of preparation method of stalk fiber board, step includes：
1) 85~90% stalk and 10~15% lignin are chosen by mass percentage；
2) stalk is transported in steam-explosion jar, closes steam-explosion jar feed inlet valve, being passed through steam in steam-explosion jar makes steam explosion
Pressure inside the tank is 1.2~1.8MPa, and the heat-insulation pressure keeping time is 5~10min, then moment opening steam-explosion jar discharge valve so that
In material abrupt release to steam explosion jetting storehouse；
3) by after steam explosion material and lignin mix after carry out defibrator process, carry out pneumatic conveying drying after defibrator process, pneumatic conveying drying
Hot air temperature is 160~180 DEG C, and the mixed material moisture after drying is 8~12%；
4) mixed material after drying is subjected to molding of mating formation.
Preferred embodiment is：The stalk is the one or more of maize straw, wheat stalk and straw.
Preferred embodiment is：The lignin is to be done using agricultural wastes in the industry of raw material cellulose ethyl alcohol, is led to
Cross the isolated a kind of slag charge of no soda acid steam explosion, enzymatic hydrolysis and fermentation, distillation, sheet frame, drying, crushing, machinery milling to 400~
The lignin of 1200 mesh.
Preferred embodiment is：After the stalk removes rubble silt particle therein, iron class impurity, it is delivered to by belt conveyer
Steam-explosion jar.
Preferred embodiment is：Mixed material after pneumatic conveying drying is delivered to the siccative storage being arranged on molding machine top
Storehouse.
Preferred embodiment is：The molding method of mating formation is：Mixed material after pneumatic conveying drying is stored by siccative
The at the uniform velocity forward movement of storehouse bottom belt, mixed material is sent to discharge port, is forced material casting by material casting roller, is provided to spreading head
The stream of laterally homogeneous and continuous equivalent, stream uniformly drop down onto forming line under the action of one group of oblique material casting roller of spreading head
On foraminous conveyer, and certain thickness slab is formed, in shaping box and puts down roller and have negative pressure device, to adjust shaping slab
The uniformity, and make slab have certain compactness.
Preferred embodiment is：Slab after mating formation is sent by forming belt to preformer and carries out precompressed, is entered after precompressed continuous
Transporter, slab are sent into continuous single-layer type hot press by continuous conveyor and carry out hot pressing, and hot pressing temperature is 160~220 DEG C.
Preferred embodiment is：Workblank sheet material after hot-forming is cut into regulatory specifications by briar, is sent one by one by transporter
Stacking curing storage is carried out after entering panel turnover machine cooling, the workblank sheet material after curing storage enters sander system and carries out two-sided fixed thickness
Sanding.
Preferred embodiment is：The primary sander that workblank sheet material after curing storage enters sander system carries out two-sided fixed thickness
The two-stage abrasive band mesh number of sanding, primary sander is respectively 60 mesh, 120 mesh, and sand removes plank pre-hardening thickness upper and lower surfaces of, makes
Plank reaches defined thickness, and the two level sander progress prescribed requirement surface that the plank after primary sanding enters sanding system is thin
The two-stage abrasive band mesh number of sanding, two level sander is respectively 240 mesh, 320 mesh.
Preferred embodiment is：It carries out the plank after two-sided fixed thick sanding and is cut into defined specification by longitudinal edge cutting machine, through inspection
Test, grade after be finished product plank.
Beneficial effects of the present invention：
1, the works such as polymerization, the polycondensation of the present invention using the substance and lignin generated during steam explosion in hot pressing
With, be molded through hot-press solidifying, do not use urea-formaldehyde resin adhesive, burst size of methanal zero；
2, the present invention makees raw material production straw fiber board using agricultural wastes, not only solves rural area crop straw burning and causes
The problem of atmosphere pollution, and energy saving cost of material, then reduce plank price；
3, stalk fiber board provided by the invention, it is sturdy and durable, indeformable, anti-aging, can it is fire-retardant, can moisture-proof, sound-absorbing
Heat-insulated and have the characteristics that environmentally protective, nontoxic, tasteless, formaldehydeless, internal bond strength is high, and static bending strength is good.
Description of the drawings
Fig. 1 is the flow diagram of the present invention.
Specific implementation mode
The present invention is described in further detail below, to enable those skilled in the art being capable of evidence with reference to specification word
To implement.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
The present invention provides a kind of preparation method of stalk fiber board, step includes：
1) 85~90% stalk and 10~15% lignin are chosen by mass percentage；
2) stalk is transported in steam-explosion jar, closes steam-explosion jar feed inlet valve, being passed through steam in steam-explosion jar makes steam explosion
Pressure inside the tank is 1.2~1.8MPa, and the heat-insulation pressure keeping time is 5~10min, then moment opening steam-explosion jar discharge valve so that
In material abrupt release to steam explosion jetting storehouse；
3) by after steam explosion material and lignin mix after carry out defibrator process, carry out pneumatic conveying drying after defibrator process, pneumatic conveying drying
Hot air temperature is 160~180 DEG C, and the mixed material moisture after drying is 8~12%；
4) mixed material after drying is subjected to molding of mating formation.
The stalk is the one or more of maize straw, wheat stalk and straw.
The lignin is to be done using agricultural wastes in the industry of raw material cellulose ethyl alcohol, passes through no soda acid vapour
The isolated a kind of slag charge of quick-fried, enzymatic hydrolysis and fermentation, distillation, sheet frame, drying, crushing, machinery are milled to the wood of 400~1200 mesh
Quality.
After the stalk removes rubble silt particle therein, iron class impurity, steam-explosion jar is delivered to by belt conveyer.
Mixed material after pneumatic conveying drying is delivered to the siccative repository being arranged on molding machine top.
The molding method of mating formation is：Mixed material after pneumatic conveying drying passes through siccative repository bottom belt
At the uniform velocity forward movement, mixed material is sent to discharge port, by material casting roller force material casting, to spreading head provide it is laterally homogeneous and even
The stream of continuous equivalent, stream is under the action of one group of oblique material casting roller of spreading head, on the foraminous conveyer that uniformly drops down onto forming line, and
Certain thickness slab is formed, in shaping box and roller is put down and has negative pressure device, to adjust the uniformity of shaping slab, and make
Slab has certain compactness.
Slab after mating formation is sent by forming belt to preformer and carries out precompressed, continuous conveyor, slab are entered after precompressed
It is sent into continuous single-layer type hot press by continuous conveyor and carries out hot pressing, hot pressing temperature is 160~220 DEG C.
Workblank sheet material after hot-forming is cut into regulatory specifications by briar, is sent into panel turnover machine cooling one by one by transporter
Stacking curing storage is carried out afterwards, and the workblank sheet material after curing storage enters sander system and carries out two-sided fixed thick sanding.
The primary sander that workblank sheet material after curing storage enters sander system carries out two-sided fixed thick sanding, primary sand
The two-stage abrasive band mesh number of ray machine is respectively 60 mesh, 120 mesh, and sand removes plank pre-hardening thickness upper and lower surfaces of, plank is made to reach regulation
Thickness, the two level sander that the plank after primary sanding enters sanding system carries out prescribed requirement surface fine sand light, two level sand
The two-stage abrasive band mesh number of ray machine is respectively 240 mesh, 320 mesh
It carries out the plank after two-sided fixed thick sanding and is cut into defined specification by longitudinal edge cutting machine, after examining, grading i.e.
For finished product plank.
Embodiment 1
A kind of preparation method of stalk fiber board is present embodiments provided, step includes：
1) 85% maize straw and 15% lignin are chosen by mass percentage, and the lignin is useless using agricultural
Gurry is done in the industry of raw material cellulose ethyl alcohol, isolated by no soda acid steam explosion, enzymatic hydrolysis and fermentation, distillation, sheet frame
A kind of slag charge, drying, crushing, machinery are milled to the lignin of 400 mesh；
2) maize straw is passed through by impurity such as the equipment such as reciprocating sieve, iron remover removing rubble silt particle therein, iron classes
Belt conveyer conveys a certain amount of material in the steam-explosion jar that discharge port is closed, and closes the feed inlet valve of steam-explosion jar, beats
The steam valve of steam-explosion jar is opened, steam is passed through in steam-explosion jar and so that steam explosion pressure inside the tank is 1.2MPa, the heat-insulation pressure keeping time is
Steam-explosion jar is opened after 5min so that in material abrupt release to steam explosion jetting storehouse；
3) material after steam explosion and lignin are delivered to through belt conveyer in defibrator to scale, the object after defibrator process
Material is dried by Air Dried System to defined moisture, into the siccative repository being arranged on molding machine top.Pneumatic conveying drying
Hot air temperature be 160 DEG C, it is dry after material moisture be 8%；
4) mixed material after drying is subjected to molding of mating formation, the molding method of mating formation is：After pneumatic conveying drying
Mixed material by the at the uniform velocity forward movement of siccative repository bottom belt, mixed material is sent to discharge port, by material casting
Roller forces material casting, and the stream of laterally homogeneous and continuous equivalent, work of the stream in one group of oblique material casting roller of spreading head are provided to spreading head
Under, on the foraminous conveyer that uniformly drops down onto forming line, and certain thickness slab is formed, in shaping box and puts down roller and have
Negative pressure device to adjust the uniformity of shaping slab, and makes slab have certain compactness；
5) slab after mating formation is sent by forming belt to preformer and carries out precompressed, continuous conveyor, plate are entered after precompressed
Base is sent into continuous single-layer type hot press by continuous conveyor and carries out hot pressing, and hot pressing temperature is 160 DEG C；
6) workblank sheet material after hot-forming is cut into regulatory specifications by briar, and it is cold to be sent into panel turnover machine one by one by transporter
But progress stacking curing storage afterwards, the primary sander progress that the workblank sheet material after curing storage enters sander system are two-sided fixed
The two-stage abrasive band mesh number of thick sanding, primary sander is respectively 60 mesh, 120 mesh, and sand removes plank pre-hardening thickness upper and lower surfaces of,
Plank is set to reach defined thickness, the two level sander that the plank after primary sanding enters sanding system carries out prescribed requirement surface
The two-stage abrasive band mesh number of fine sand light, two level sander is respectively 240 mesh, 320 mesh；
7) it carries out the plank after two-sided fixed thick sanding and is cut into defined specification by longitudinal edge cutting machine, after examining, grading
As finished product plank.
Embodiment 2
A kind of preparation method of stalk fiber board is present embodiments provided, step includes：
1) 90% wheat stalk and 10% lignin are chosen by mass percentage, and the lignin is useless using agricultural
Gurry is done in the industry of raw material cellulose ethyl alcohol, isolated by no soda acid steam explosion, enzymatic hydrolysis and fermentation, distillation, sheet frame
A kind of slag charge, drying, crushing, machinery are milled to the lignin of 1200 mesh；
2) wheat stalk is passed through by impurity such as the equipment such as reciprocating sieve, iron remover removing rubble silt particle therein, iron classes
Belt conveyer conveys a certain amount of material in the steam-explosion jar that discharge port is closed, and closes the feed inlet valve of steam-explosion jar, beats
The steam valve of steam-explosion jar is opened, steam is passed through in steam-explosion jar and so that steam explosion pressure inside the tank is 1.8MPa, the heat-insulation pressure keeping time is
Steam-explosion jar is opened after 10min so that in material abrupt release to steam explosion jetting storehouse；
3) material after steam explosion and lignin are delivered to through belt conveyer in defibrator to scale, the object after defibrator process
Material is dried by Air Dried System to defined moisture, into the siccative repository being arranged on molding machine top.Pneumatic conveying drying
Hot air temperature be 180 DEG C, it is dry after material moisture be 12%；
4) mixed material after drying is subjected to molding of mating formation, the molding method of mating formation is：After pneumatic conveying drying
Mixed material by the at the uniform velocity forward movement of siccative repository bottom belt, mixed material is sent to discharge port, by material casting
Roller forces material casting, and the stream of laterally homogeneous and continuous equivalent, work of the stream in one group of oblique material casting roller of spreading head are provided to spreading head
Under, on the foraminous conveyer that uniformly drops down onto forming line, and certain thickness slab is formed, in shaping box and puts down roller and have
Negative pressure device to adjust the uniformity of shaping slab, and makes slab have certain compactness；
5) slab after mating formation is sent by forming belt to preformer and carries out precompressed, continuous conveyor, plate are entered after precompressed
Base is sent into continuous single-layer type hot press by continuous conveyor and carries out hot pressing, and hot pressing temperature is 220 DEG C；
6) workblank sheet material after hot-forming is cut into regulatory specifications by briar, and it is cold to be sent into panel turnover machine one by one by transporter
But progress stacking curing storage afterwards, the primary sander progress that the workblank sheet material after curing storage enters sander system are two-sided fixed
The two-stage abrasive band mesh number of thick sanding, primary sander is respectively 60 mesh, 120 mesh, and sand removes plank pre-hardening thickness upper and lower surfaces of,
Plank is set to reach defined thickness, the two level sander that the plank after primary sanding enters sanding system carries out prescribed requirement surface
The two-stage abrasive band mesh number of fine sand light, two level sander is respectively 240 mesh, 320 mesh；
7) it carries out the plank after two-sided fixed thick sanding and is cut into defined specification by longitudinal edge cutting machine, after examining, grading
As finished product plank.
Embodiment 3
A kind of preparation method of stalk fiber board is present embodiments provided, step includes：
1) 88% straw and 12% lignin are chosen by mass percentage, and the lignin is to utilize agricultural wastes
In the industry for making raw material cellulose ethyl alcohol, pass through the isolated one kind of no soda acid steam explosion, enzymatic hydrolysis and fermentation, distillation, sheet frame
Slag charge, drying, crushing, machinery are milled to the lignin of 800 mesh；
2) straw is passed through into belt by impurity such as the equipment such as reciprocating sieve, iron remover removing rubble silt particle therein, iron classes
Transporter conveys a certain amount of material in the steam-explosion jar that discharge port is closed, and closes the feed inlet valve of steam-explosion jar, opens vapour
The steam valve of quick-fried tank is passed through steam in steam-explosion jar and so that steam explosion pressure inside the tank is 1.5MPa, after the heat-insulation pressure keeping time is 7min
Open steam-explosion jar so that in material abrupt release to steam explosion jetting storehouse；
3) material after steam explosion and lignin are delivered to through belt conveyer in defibrator to scale, the object after defibrator process
Material is dried by Air Dried System to defined moisture, into the siccative repository being arranged on molding machine top.Pneumatic conveying drying
Hot air temperature be 170 DEG C, it is dry after material moisture be 10%；
4) mixed material after drying is subjected to molding of mating formation, the molding method of mating formation is：After pneumatic conveying drying
Mixed material by the at the uniform velocity forward movement of siccative repository bottom belt, mixed material is sent to discharge port, by material casting
Roller forces material casting, and the stream of laterally homogeneous and continuous equivalent, work of the stream in one group of oblique material casting roller of spreading head are provided to spreading head
Under, on the foraminous conveyer that uniformly drops down onto forming line, and certain thickness slab is formed, in shaping box and puts down roller and have
Negative pressure device to adjust the uniformity of shaping slab, and makes slab have certain compactness；
5) slab after mating formation is sent by forming belt to preformer and carries out precompressed, continuous conveyor, plate are entered after precompressed
Base is sent into continuous single-layer type hot press by continuous conveyor and carries out hot pressing, and hot pressing temperature is 200 DEG C；
6) workblank sheet material after hot-forming is cut into regulatory specifications by briar, and it is cold to be sent into panel turnover machine one by one by transporter
But progress stacking curing storage afterwards, the primary sander progress that the workblank sheet material after curing storage enters sander system are two-sided fixed
The two-stage abrasive band mesh number of thick sanding, primary sander is respectively 60 mesh, 120 mesh, and sand removes plank pre-hardening thickness upper and lower surfaces of,
Plank is set to reach defined thickness, the two level sander that the plank after primary sanding enters sanding system carries out prescribed requirement surface
The two-stage abrasive band mesh number of fine sand light, two level sander is respectively 240 mesh, 320 mesh；
7) it carries out the plank after two-sided fixed thick sanding and is cut into defined specification by longitudinal edge cutting machine, after examining, grading
As finished product plank.
Experiment effect data are as shown in table 1
Table 1 is the detection data of the embodiment of the present invention
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details.
Claims (10)
1. the preparation method of stalk fiber board, which is characterized in that step includes：
1) 85~90% stalk and 10~15% lignin are chosen by mass percentage；
2) stalk is transported in steam-explosion jar, closes steam-explosion jar feed inlet valve, being passed through steam in steam-explosion jar makes in steam-explosion jar
Pressure is 1.2~1.8MPa, and the heat-insulation pressure keeping time is 5~10min, then moment opening steam-explosion jar discharge valve so that material
In abrupt release to steam explosion jetting storehouse；
3) by after steam explosion material and lignin mix after carry out defibrator process, carry out pneumatic conveying drying after defibrator process, the heat of pneumatic conveying drying is empty
Temperature degree is 160~180 DEG C, and the mixed material moisture after drying is 8~12%；
4) mixed material after drying is subjected to molding of mating formation.
2. the preparation method of stalk fiber board according to claim 1, which is characterized in that the stalk is corn stalk
Stalk, wheat stalk and straw it is one or more.
3. the preparation method of stalk fiber board according to claim 1, which is characterized in that the lignin is to utilize agriculture
Industry waste is done in the industry of raw material cellulose ethyl alcohol, is detached by no soda acid steam explosion, enzymatic hydrolysis and fermentation, distillation, sheet frame
A kind of slag charge arrived, drying, crushing, machinery are milled to the lignin of 400~1200 mesh.
4. the preparation method of stalk fiber board according to claim 2, which is characterized in that the stalk removes therein
After rubble silt particle, iron class impurity, steam-explosion jar is delivered to by belt conveyer.
5. the preparation method of stalk fiber board according to claim 2, which is characterized in that mixed after pneumatic conveying drying
It closes material and is delivered to the siccative repository being arranged on molding machine top.
6. the preparation method of straw fiber board according to claim 5, which is characterized in that the molding method of mating formation
For：Mixed material after pneumatic conveying drying is by the at the uniform velocity forward movement of siccative repository bottom belt, by mixed material
It send to discharge port, material casting is forced by material casting roller, the stream of laterally homogeneous and continuous equivalent is provided to spreading head, stream is in spreading head
Under the action of one group of oblique material casting roller, on the foraminous conveyer that uniformly drops down onto forming line, and certain thickness slab is formed, be molded
It case and puts down roller and has negative pressure device, to adjust the uniformity of shaping slab, and make slab that there is certain compactness.
7. the preparation method of straw fiber board according to claim 6, which is characterized in that by the slab after mating formation by being molded
Belt send to preformer and carries out precompressed, and continuous conveyor is entered after precompressed, and slab is sent into continuous single-layer type heat by continuous conveyor
Hot pressing is carried out in press, hot pressing temperature is 160~220 DEG C.
8. the preparation method of straw fiber board according to claim 7, which is characterized in that the workblank sheet material after hot-forming
Regulatory specifications are cut by briar, stacking curing storage, curing storage are carried out after being sent into panel turnover machine cooling one by one by transporter
Workblank sheet material afterwards enters sander system and carries out two-sided fixed thick sanding.
9. the preparation method of straw fiber board according to claim 8, which is characterized in that the workblank sheet material after curing storage
Primary sander into sander system carries out two-sided fixed thick sanding, the two-stage abrasive band mesh number of primary sander distinguish 60 mesh,
120 mesh, sand remove plank pre-hardening thickness upper and lower surfaces of, so that plank is reached defined thickness, the plank after primary sanding enters sand
The two level sander of photosystem carries out prescribed requirement surface fine sand light, the two-stage abrasive band mesh number of two level sander be respectively 240 mesh,
320 mesh.
10. the preparation method of straw fiber board according to claim 8, which is characterized in that after carrying out two-sided fixed thick sanding
Plank be cut into defined specification by longitudinal edge cutting machine, be finished product plank after examining, grading.
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Application publication date: 20180904 |