CN108162102B - Process and system for producing biomass active filler for plywood - Google Patents

Process and system for producing biomass active filler for plywood Download PDF

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Publication number
CN108162102B
CN108162102B CN201611112745.2A CN201611112745A CN108162102B CN 108162102 B CN108162102 B CN 108162102B CN 201611112745 A CN201611112745 A CN 201611112745A CN 108162102 B CN108162102 B CN 108162102B
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bin
equipment
pipeline
feeding
machine
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CN108162102A (en
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于海飞
孙宇琳
崔洋
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China Becl International Engineering Co ltd
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China Becl International Engineering Co ltd
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    • 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
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G3/00—Arrangements for removing bark-zones, chips, waste, or dust, specially designed for use in connection with wood-working machine or in wood-working plants
    • 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
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/34—Organic impregnating agents
    • 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
    • B27K5/007—Treating of wood not provided for in groups B27K1/00, B27K3/00 using pressure
    • 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
    • B27K5/04—Combined bleaching or impregnating and drying of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/06—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood powder or sawdust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
    • 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 invention provides a process and a system for producing biomass active filler for plywood, wherein the process comprises the following steps: coarse crushing, soaking, extruding, drying, crushing, mixing and packaging the eucalyptus bark. The produced product can completely replace agricultural products such as filler-flour and the like used in the plywood industry, and the purposes of reducing the production cost and improving the performance (formaldehyde reduction, bonding property and water resistance) of the adhesive for the wood industry are achieved.

Description

Process and system for producing biomass active filler for plywood
Technical Field
The invention belongs to the field of wood processing, and relates to a production process of biomass active filler capable of replacing flour as a filler used in the plywood industry.
Background
The dosage of urea-formaldehyde glue and melamine modified urea-formaldehyde glue in the adhesive for wood industry in China accounts for about 90.9% of the total amount of the wood adhesive, the current filler used as urea-formaldehyde resin is mainly flour, and 30kg of industrial flour (mainly wheat flour) needs to be added to each cubic finished adhesive to improve the viscosity of the finished adhesive. As the urea-formaldehyde resin adhesive has poor water resistance, the fillers such as flour and the like are easy to mildew in a humid environment, the aging of the plywood is accelerated, the phenomena of strength reduction, glue failure and the like occur, and more acidified formaldehyde (CH) is released2OH+) Therefore, the flour and other fillers are difficult to effectively solve the harm of free formaldehyde. The cultivated land area in China reaches the red line which guarantees the basic food for residents, and a large amount of grains are used as fillers, so that the cultivated land area is obviously not suitable for the national conditions of China. In addition, the price of agricultural products is greatly increased in recent years, and the production cost of the plywood is increased.
The eucalyptus tree is from Australia, has rapid growth, strong adaptability and high wood yield, and is one of three fast-growing woods in the world. Therefore, it is introduced and cultivated in many countries and regions of the world. According to statistics, the planting area of the eucalyptus artificial forest in the world reaches 2000 million hectares, eucalyptus tree species are introduced in China, and the planting area of the eucalyptus artificial forest reaches 150 million hectares at present. Wood resources from eucalyptus are abundant.
The wood peeled from eucalyptus trunks is widely used as a raw material for manufacturing chipboards, particle boards, and various plywood panels after being processed. However, in the processing process, the generated eucalyptus bark is not fully utilized, so that the resource waste is caused, and the environment is polluted.
How to find an alternative product of the filling flour of the plywood and reduce the production cost of the plywood still has no effective solution at present.
Disclosure of Invention
In order to solve the problems, the invention provides a production process of biomass active filler for plywood, which uses eucalyptus bark waste in eucalyptus wood processing as a raw material to produce the filler for the plywood, so that on one hand, the increase of the production cost of the plywood caused by the rise of the price of agricultural products is avoided, on the other hand, the problem of recycling of the eucalyptus bark waste is solved, and the environmental pollution is reduced.
In order to achieve the above object, the present invention provides a process for producing a biomass active filler for plywood, comprising the steps of:
1) coarse crushing and feeding: the method comprises the following steps of (1) roughly crushing eucalyptus barks, then sending the roughly crushed eucalyptus barks into a feeding bin of feeding equipment, enabling the eucalyptus barks to uniformly fall onto a first belt conveyor through a material poking device at the bin bottom of the feeding bin, and conveying the eucalyptus barks to infiltration equipment through the first belt conveyor;
2) infiltrating: the eucalyptus bark is soaked in the formula solution filled in the soaking equipment for 8-15min, and the water content is 85-90% after soaking;
3) extruding: conveying the soaked eucalyptus bark to an extrusion device through a net type belt for intermittent extrusion, wherein the extrusion pressure is 25Mpa, the pressure maintaining time is 25s, the primary extrusion period is 40s, meanwhile, filtering the extruded solution and conveying the filtered solution to the infiltration device for recycling, and the water content of the squeezed eucalyptus bark is 45-55%;
4) and (3) drying: conveying the squeezed eucalyptus bark to a buffer bin of a drying device through a second belt conveyor, enabling the material to uniformly enter the drying device through a kick-out device at the bottom of the buffer bin, and drying the eucalyptus bark through hot air conveyed by a hot air supply device to reduce the water content of the eucalyptus bark to 8-11%;
5) crushing: conveying the dried eucalyptus bark to a crushing device through a third belt conveyor to crush the dried eucalyptus bark into eucalyptus bark powder, wherein the crushing granularity is required to be larger than 200 meshes;
6) mixing: conveying the crushed eucalyptus bark powder to a mixing device through a negative pressure conveying pipeline, and mixing the eucalyptus bark powder with auxiliary materials for 35-45min to prepare a mixture, wherein the content of the eucalyptus bark powder in the mixture is 40-70%;
7) packaging: the mixture is conveyed to a packaging device by a screw conveyor for packaging.
Preferably, the water content of the eucalyptus bark in the step 1) is 45-55%, and the eucalyptus bark is coarsely crushed to the length of 3-5 cm, so that the qualified powder discharge amount of the crusher is increased.
Preferably, the formula solution in the step 2) is a sodium dodecyl benzene sulfonate solution with the mass concentration of 5-8%.
The impregnation in the step 2) in the process provided by the invention modifies the eucalyptus bark, and aims to:
1) improves the dispersibility and compatibility of the eucalyptus bark powder in the glue. The modified eucalyptus bark powder can be quickly dispersed into glue during glue mixing to form stable suspension, so that the prepressing performance of the adhesive can be improved, and the gluing strength is improved;
2) changing the surface tension of the wood flour;
3) adjusting the pH value of the wood powder;
4) activation: the reactivity of tannin and other substances in the eucalyptus bark powder is excited so as to be fully combined with free formaldehyde, active hydroxyl and the like in the adhesive.
The invention also provides a system for producing the biomass active filler for the plywood, which comprises feeding equipment, infiltration equipment, extrusion equipment, hot air supply equipment, drying equipment, crushing equipment, mixing equipment, packaging equipment and conveying equipment, wherein the feeding equipment is used for feeding the biomass active filler;
wherein, the conveying equipment comprises a first belt conveyor, a second belt conveyor, a third belt conveyor, a net type belt, a plurality of negative pressure conveying pipelines and a screw conveyor; the conveying equipment is used for conveying the eucalyptus bark processed in the previous process to the next process;
the feeding equipment comprises a feeding bin and a kick-out device, the kick-out device is fixed above the bottom opening of the feeding bin, the feeding end of the first belt conveyor is positioned below the bottom opening of the feeding bin, and eucalyptus bark can uniformly fall onto the first belt conveyor under the action of the kick-out device;
the infiltrating device comprises a continuous infiltrating machine and a high-level tank, wherein a formula solution is poured into a tank body of the continuous infiltrating machine, a plurality of rotary turning plates are arranged on the upper half part of the tank body and used for uniformly mixing biomass and the formula solution through rotary stirring, the formula solution is filled into the high-level tank and is connected with the tank body of the continuous infiltrating machine through a pipeline, a liquid level meter is arranged on the outer side of the tank body of the continuous infiltrating machine and used for monitoring the liquid level of the formula solution in the tank body, and when the liquid level of the formula solution is lower than a preset value, the formula solution is poured into the continuous infiltrating machine through the high-level tank so that the liquid level of the formula solution is kept stable; the feed inlet of the continuous soaker is positioned below the discharge end of the first belt conveyor and used for receiving eucalyptus bark materials; the discharge port of the continuous soakage machine is positioned above the feeding end of the net type belt;
the extruding device is a vertical extruder, and a feeding bin of the vertical extruder is positioned below the discharging end of the net type belt and is used for receiving eucalyptus bark materials; the discharge port of the vertical extruder is positioned above the feeding end of the second belt conveyor, a liquid collecting tray of the vertical extruder is connected with a backflow pipeline, and the other end of the backflow pipeline is connected with a groove body of the continuous infiltration machine and used for backflow of liquid extruded by the vertical extruder to the continuous infiltration machine;
the hot air supply device is a hot air furnace, the hot air furnace takes biomass fuel as a raw material, and is connected to the drying device through a hot air pipeline to supply hot air for drying eucalyptus barks to the drying device;
the drying equipment is a roller dryer, a buffer bin is fixedly connected above the feeding end of the roller dryer, the lower part of the buffer bin is fixedly connected with a kick-out device, and the other end of the hot air pipeline is fixedly connected with the feeding end of the roller dryer; the discharge end of the roller dryer is positioned above the feeding end of the third belt conveyor;
the crushing equipment comprises a crusher, a raw material bin and third dust removing equipment, wherein the third dust removing equipment comprises a bag-type dust remover and an induced draft fan, and the bag-type dust remover is connected with the induced draft fan through a dust removing pipeline; the raw material bin is positioned below the discharge end of the third belt conveyor, the bottom of the raw material bin is fixedly connected with a kick-out device, the raw material bin, the feed inlet of the pulverizer and the bag-type dust remover of the third dust removing device are connected through a negative pressure conveying pipeline, a slag discharge port of the pulverizer is used for discharging eucalyptus bark slag, and the bottom end of the bag-type dust remover is connected with a powder collecting bin through a negative pressure conveying pipeline;
the mixing equipment comprises a mixer, a powder bin, one or more auxiliary material bins and a buffer bin, wherein the powder bin and the auxiliary material bins are positioned above the mixer and are fixedly connected with the mixer through a chute; the auxiliary material bin is connected with an auxiliary material feeding hopper through a negative pressure conveying pipeline; a vacuum pump is respectively connected with the powder bin, the auxiliary material bin and the powder collecting bin through vacuum pipelines to provide power for negative pressure conveying, the buffer bin is positioned below the mixing machine and is fixedly connected with the mixing machine, and an outlet at the bottom of the buffer bin is positioned above the feeding end of the screw conveyor;
the packaging equipment is a packaging machine, and a buffer bin of the packaging machine is positioned below the conveying and discharging end of the screw conveyor and is used for receiving mixed materials;
wherein the biomass fuel is agricultural and forestry waste.
Furthermore, the hot blast stove is further connected with a first dust removal device, the first dust removal device comprises a bag-type dust remover and an induced draft fan, the hot blast stove is connected with the bag-type dust remover through a dust removal pipeline between the bag-type dust remover and the induced draft fan, and finally the waste gas is discharged after being subjected to dust removal through the dust removal pipeline.
Furthermore, the discharge end of the roller dryer is further connected with a second dust removal device, the second dust removal device comprises a cyclone dust collector and an induced draft fan, the discharge end of the roller dryer is connected with the cyclone dust collector through a dust removal pipeline, and finally hot air used for drying biomass is discharged after dust removal through the dust removal pipeline.
The biomass active filler is mainly used as an additive of an adhesive for the plywood industry. The traditional material (flour) is used as a filler of urea-formaldehyde resin and phenolic resin, only plays roles in filling and tackifying, is brittle after hot-pressing curing, and causes the water resistance of the plywood to be rapidly reduced when the addition amount is too much; the eucalyptus bark powder is rich in tannin, and the substance can react with free formaldehyde, active hydroxyl and the like in the adhesive, so that the effects of reducing the formaldehyde emission of the artificial board and improving the bonding strength can be achieved, and meanwhile, the toughness of the artificial board can be increased after hot pressing; in addition, the traditional material (flour) is easy to mildew, but the aromatic oil contained in the eucalyptus has the effects of sterilization and mosquito repelling, so that the eucalyptus bark powder cannot mildew.
The bonding strength of the active functional filler and the traditional material (flour) is improved by 30-40% compared with that of the traditional material (flour) according to the method in GB/T17657-2013 physicochemical property test method for artificial boards and veneered artificial boards; the formaldehyde emission is reduced by 20 to 30 percent compared with the traditional material (flour); the dipping and peeling test has no peeling phenomenon and completely meets the national standard requirements.
The invention has the beneficial effects that:
the invention provides a process and a system for producing biomass active filler for plywood, the production process and the system open up a new use way for processing residues (eucalyptus bark) in the wood industry, improve the utilization value of the biomass active filler, not only can replace agricultural products such as flour and the like which are used in large quantities in the plywood industry and reduce the production cost, but also provide a novel active additive for the plywood industry, which can effectively reduce the formaldehyde release amount of the plywood and improve the bonding strength and the bonding water resistance.
Drawings
FIG. 1 is a process flow diagram of biomass active filler provided by the invention.
Reference numerals
1: a feeding device; 11: and (3) feeding a bin: 12: a kick-out device; 21: a first belt conveyor; 22: a second belt conveyor; 23: a third belt conveyor; 24: a negative pressure delivery conduit; 25: a screw conveyor; 3: a continuous soakage machine; 31: rotating the turning plate; a 32 mesh belt; 33: a high-level tank; 34: a liquid level meter; 4: a vertical extruder; 41: a feeding bin; 42: a return line; 5: a drum dryer; 51: a front buffer bin; 52: a kick-out device; 53: a barrel; 54: a cyclone dust collector; 55: an induced draft fan; 56: a dust removal air pipe; 57; a cloth bag; 6: a pulverizer; 61: a raw material bin; 611: a feed inlet; 612: a slag discharge port; 62: a kick-out device; 63: a bag-type dust collector; 64: a vacuum pump; 65: an induced draft fan; 66: a powder collecting bin; 67: an auxiliary material feeding hopper; 68: a dust removal air pipe; 69: a vacuum line; 7: a mixer; 71: a powder bin; 72: an auxiliary material bin; 73: a buffer bin; 74: a chute; 8: a packaging machine; 81: a buffer bin; 9: a hot blast stove; 91: a bag-type dust collector; 92: an induced draft fan; 93: a hot air duct; 94: a dust removal air pipe.
Detailed Description
For better understanding of the essence of the present invention, the technical contents of the present invention will be described in detail with reference to examples, but the contents of the present invention are not limited thereto and thus should not be construed as limiting the scope of the present invention.
The main process equipment used by the invention is as follows:
1. the feeding equipment was purchased from Jiangsu Kogyo hydromechanical group, Inc.
2. Continuous infiltration machines were purchased from reed mechanical llc of the city.
3. The vertical extruder was purchased from dynes heavy industry machines ltd, Tenn.
4. The tumble dryer was purchased from unified drying equipment, ltd, changzhou.
5. The pulverizer was purchased from Weifang City essence powder engineering equipment Co., Ltd.
6. Mixers (horizontal ribbon) were purchased from twin dragon group ltd.
7. The packaging machine is purchased from Wuxi Martin chemical machinery Co.
Example 1
Preparation before production:
1. the drum dryer was started and preheated for about 1 hour before feeding.
2. Starting the continuous soakage machine, and filling the formula solution into the continuous soakage machine.
3. Starting the feeding equipment and the extruder.
The production process flow of the biomass active filler for the plywood is shown in figure 1, black arrows represent the transportation direction of biomass eucalyptus bark, and the production process flow specifically comprises the following steps:
1) coarse crushing and feeding: the eucalyptus bark is roughly crushed, then the roughly crushed eucalyptus bark is sent into a feeding bin 11 of a feeding device 1, the eucalyptus bark uniformly falls onto a first belt conveyor 21 through a material poking device 12 at the bin bottom of the feeding bin 11, and the eucalyptus bark is conveyed to a continuous soakage machine 3 through the first belt conveyor 21;
the crushed eucalyptus bark has a length of 5cm and a water content of 50%, and the coarse crushing is carried out by using a shredder (not shown in the figure).
2. Infiltrating: soaking the eucalyptus bark in a formula solution filled in a continuous soaking machine 3 for 15min, wherein the water content is 90% after soaking;
the formula solution is 5-8% sodium dodecyl benzene sulfonate solution.
3) Extruding: conveying the soaked eucalyptus bark to a vertical extruder 4 through a net belt 32 for intermittent extrusion, wherein the extrusion pressure is 25MPa, the pressure maintaining time is 25s, the primary extrusion period is 40s, meanwhile, filtering the extruded solution and conveying the filtered solution to a continuous soakage machine 3 for recycling, and the water content of the eucalyptus bark is 50% after extrusion.
4) And (3) drying: conveying the squeezed eucalyptus bark to a buffer bin 51 above the roller dryer 5 through a second belt conveyor 22, enabling the material to uniformly enter the roller dryer 5 through a material poking device 52 at the bottom of the buffer bin 51, drying through hot air conveyed by a hot air furnace 9, and drying to enable the water content of the eucalyptus bark to be reduced to 8%;
5) crushing: conveying the dried eucalyptus bark to a grinder 6 through a third belt conveyor 23 to grind the dried eucalyptus bark into eucalyptus bark powder, wherein the grinding granularity is required to be larger than 200 meshes;
after sieving the slag discharged by the crusher 6, recycling the powder with a particle size larger than 200 meshes, and recycling the powder with a particle size smaller than 200 meshes (accounting for about 6-7% of the weight of the raw materials) by a supplier to be used as a raw material for making incense.
6) Mixing: the crushed eucalyptus bark powder is conveyed to a mixer 7 through a negative pressure conveying pipeline 24 and is mixed with auxiliary materials of kaolin and plant ash for 40min to prepare a mixture, wherein the content of the eucalyptus bark powder in the mixture is 40-70%, the content of the kaolin is 15-30%, the content of the plant ash is 15-30%, and the mixture ratio in the embodiment is as follows: the eucalyptus bark powder 60.
7) Packaging: the mixed material is conveyed to the packaging machine 8 by the screw conveyor 25 for packaging.
The system for producing the biomass active filler for the plywood comprises feeding equipment, infiltration equipment, extrusion equipment, hot air supply equipment, drying equipment, crushing equipment, mixing equipment, packaging equipment and conveying equipment;
wherein, the conveying device comprises a first belt conveyor 21, a second belt conveyor 22, a third belt conveyor 23, a net-type belt 32, a plurality of negative pressure conveying pipelines 24 and a screw conveyor 25; the conveying equipment is used for conveying the eucalyptus bark processed in the previous process to the next process;
wherein, one end of the belt type conveying equipment for receiving the eucalyptus bark material is defined as a feeding end, and one section for unloading the eucalyptus bark material is defined as a discharging end;
the feeding device 1 comprises a feeding bin 11 and a kick-out device 12, the kick-out device 12 is fixed above the bottom opening of the feeding bin 11, the feeding end of the first belt conveyor 21 is positioned below the bottom opening of the feeding bin 11, and eucalyptus bark can uniformly fall to the first belt conveyor 21 under the action of the kick-out device 12;
the infiltration equipment comprises a continuous infiltration machine 3 and a high-level tank 33, a formula solution is poured into a tank body of the continuous infiltration machine 3, a plurality of rotary turning plates 31 are arranged on the upper half part of the tank body and used for uniformly mixing biomass and the formula solution through rotary stirring, the formula solution is filled into the high-level tank 33 and is connected with the tank body of the continuous infiltration machine 3 through a pipeline, a liquid level meter 34 is arranged on the outer side of the tank body of the continuous infiltration machine 3 and used for monitoring the liquid level of the formula solution in the tank body, and when the liquid level of the formula solution is lower than a preset value, the formula solution is poured into the continuous infiltration machine through the high-level tank 33, so that the liquid level of the formula solution is kept stable; the feed inlet of the continuous soaker 3 is positioned below the discharge end of the first belt conveyor 21 and is used for receiving biomass raw materials; the discharge port of the continuous soaker 3 is positioned above the feeding end of the net type belt 32;
the extrusion equipment is a vertical extruder 4, and a feeding bin 41 of the vertical extruder 4 is positioned below the discharge end of the mesh belt 32 and is used for receiving eucalyptus bark; the discharge port of the vertical extruder 4 is positioned above the feeding end of the second belt conveyor 22, a return pipe 42 is connected to a liquid collecting tray (not shown in the figure) of the vertical extruder 4, and the other end of the return pipe 42 is connected to the tank body of the continuous impregnator 3, so as to return the liquid extruded by the vertical extruder 4 to the continuous impregnator 3, thereby saving the usage amount of the formula solution;
the hot air supply device comprises a hot air furnace 9, the hot air furnace takes biomass fuel as raw material, the hot air furnace 9 is connected to the drying device through a hot air pipeline 93, and hot air for drying biomass is provided for the drying device; the raw material of the hot blast stove is biomass fuel, such as agricultural and forestry waste;
this hot-blast furnace 9 further connects a first dust collecting equipment, and this first dust collecting equipment includes a sack cleaner 91 and an induced draft fan 92, and this hot-blast furnace 9 and this sack cleaner 91 are connected through dust removal pipeline 94 between this sack cleaner 91 and this induced draft fan 92 to discharge after removing dust through dust removal pipeline 94 with waste gas finally.
The drying equipment is a roller dryer 5, a buffer bin 51 is fixedly connected above the feeding end of the roller dryer, a kickoff 52 is fixedly connected at the lower part of the buffer bin, and the eucalyptus bark is dried in a cylinder 53 of the roller dryer 5 by hot air conveyed by a hot air pipeline 93; the discharge end of the roller dryer 5 is positioned above the feeding end of the third belt conveyor 23;
the discharge end of the drum dryer is further connected with a second dust removing device, the second dust removing device comprises a cyclone dust collector 54 and an induced draft fan 55, the discharge end of the drum dryer 5 is connected with the cyclone dust collector 54 through a dust removing pipeline 56, the cyclone dust collector 54 is connected with the induced draft fan 55 through a dust removing pipeline 56, finally, hot air used for drying biomass is discharged after dust removal through the dust removing pipeline 56, and collected dust falls into a cloth bag 57.
The crushing equipment comprises a crusher 6, a raw material bin 61 and third dust removing equipment, wherein the third dust removing equipment comprises a bag-type dust remover 63 and an induced draft fan 65, and the bag-type dust remover 63 is connected with the induced draft fan 65 through a dust removing pipeline 68; the raw material bin 61 is positioned below the discharge end of the third belt conveyor 23, the bottom of the raw material bin 61 is fixedly connected with a kick-out device 62, the raw material bin 61, the feed inlet 611 of the pulverizer 6 and the bag-type dust remover 63 of the third dust removing equipment are connected through a negative pressure conveying pipeline 24, the slag outlet 612 of the pulverizer 6 is used for discharging eucalyptus bark slag, and the bottom end of the bag-type dust remover 63 is connected with a powder collecting bin 66 through a negative pressure conveying pipeline 24; the eucalyptus bark materials crushed by the crushing equipment enter the next working procedure when the size of the eucalyptus bark materials is larger than 200 meshes, and the eucalyptus bark materials with the size smaller than 200 meshes are discharged as eucalyptus bark residues.
The mixing device comprises a mixer 7, a powder bin 71, one or more auxiliary material bins 72 and a buffer bin 73, wherein the powder bin 71 and the auxiliary material bins 72 are positioned above the mixer 7 and are fixedly connected with the mixer 7 through a chute 74, and the powder bin 71 is connected with the powder collecting bin 66 through a negative pressure conveying pipeline 24; the auxiliary material bin 72 is connected with an auxiliary material feeding hopper 67 through a negative pressure conveying pipeline 24; a vacuum pump 64 (roots vacuum pump) is respectively connected with the powder bin 71, the auxiliary material bin 72 and the powder collecting bin 66 through a vacuum pipeline 69, and the vacuum negative pressure generated by the vacuum pump 64 is used as the power for negative pressure conveying to respectively suck the materials into the powder bin 71, the auxiliary material bin 72 and the powder collecting bin 66; the surge bin 73 is positioned below the mixer 7 and is fixedly connected with the mixer 7, and the bottom outlet of the surge bin 73 is positioned above the feeding end of the screw conveyor 25;
the packaging equipment is a packaging machine 8, a buffer bin 81 of the packaging machine 8 is located below the discharge end of the screw conveyor 25 and is used for receiving a mixture, and the mixture enters the packaging machine 8 and is packaged into a finished product.
The invention provides a process and a system for producing biomass active filler for plywood, the production process and the system open up a new use way for processing residues (eucalyptus bark) in the wood industry, improve the utilization value of the biomass active filler, not only can replace agricultural products such as flour and the like which are used in large quantities in the plywood industry and reduce the production cost, but also provide a novel active additive for the plywood industry, which can effectively reduce the formaldehyde release amount of the plywood and improve the bonding strength and the bonding water resistance.

Claims (3)

1. A system for producing biomass active fillers for plywood is characterized by comprising feeding equipment, infiltrating equipment, extruding equipment, hot air providing equipment, drying equipment, crushing equipment, mixing equipment, packaging equipment and conveying equipment;
wherein, the conveying equipment comprises a first belt conveyor, a second belt conveyor, a third belt conveyor, a net type belt, a plurality of negative pressure conveying pipelines and a screw conveyor; the conveying equipment is used for conveying the eucalyptus bark processed in the previous process to the next process;
the feeding equipment comprises a feeding bin and a kick-out device, the kick-out device is fixed above the bottom opening of the feeding bin, the feeding end of the first belt conveyor is positioned below the bottom opening of the feeding bin, and eucalyptus bark can uniformly fall onto the first belt conveyor under the action of the kick-out device;
the infiltrating device comprises a continuous infiltrating machine and a high-level tank, wherein a formula solution is poured into a tank body of the continuous infiltrating machine, a plurality of rotary turning plates are arranged on the upper half part of the tank body and used for uniformly mixing biomass and the formula solution through rotary stirring, the formula solution is filled into the high-level tank and is connected with the tank body of the continuous infiltrating machine through a pipeline, a liquid level meter is arranged on the outer side of the tank body of the continuous infiltrating machine and used for monitoring the liquid level of the formula solution in the tank body, and when the liquid level of the formula solution is lower than a preset value, the formula solution is poured into the continuous infiltrating machine through the high-level tank so that the liquid level of the formula solution is kept stable; the feed inlet of the continuous soaker is positioned below the discharge end of the first belt conveyor and used for receiving eucalyptus bark materials; the discharge port of the continuous soakage machine is positioned above the feeding end of the net type belt;
the extruding device is a vertical extruder, and a feeding bin of the vertical extruder is positioned below the discharging end of the net type belt and is used for receiving eucalyptus bark materials; the discharge port of the vertical extruder is positioned above the feeding end of the second belt conveyor, a liquid collecting tray of the vertical extruder is connected with a backflow pipeline, and the other end of the backflow pipeline is connected with a groove body of the continuous infiltration machine and used for backflow of liquid extruded by the vertical extruder to the continuous infiltration machine;
the hot air supply device is a hot air furnace, the hot air furnace takes biomass fuel as a raw material, and is connected to the drying device through a hot air pipeline to supply hot air for drying eucalyptus barks to the drying device;
the drying equipment is a roller dryer, a buffer bin is fixedly connected above the feeding end of the roller dryer, the lower part of the buffer bin is fixedly connected with a kickoff, and the eucalyptus bark is dried in a barrel of the roller dryer through hot air conveyed by a hot air pipeline; the discharge end of the roller dryer is positioned above the feeding end of the third belt conveyor;
the crushing equipment comprises a crusher, a raw material bin and third dust removing equipment, wherein the third dust removing equipment comprises a bag-type dust remover and an induced draft fan, and the bag-type dust remover is connected with the induced draft fan through a dust removing pipeline; the raw material bin is positioned below the discharge end of the third belt conveyor, the bottom of the raw material bin is fixedly connected with a kick-out device, the discharge hole of the raw material bin is connected with the feed inlet of the pulverizer through a negative pressure conveying pipeline, the discharge hole of the pulverizer is connected with the bag-type dust remover of the third dust removing equipment through a negative pressure conveying pipeline, the slag discharge hole of the pulverizer is used for discharging eucalyptus bark slag, and the bottom end of the bag-type dust remover is connected with a powder collecting bin through a negative pressure conveying pipeline;
the mixing equipment comprises a mixer, a powder bin, one or more auxiliary material bins and a buffer bin, wherein the powder bin and the auxiliary material bins are positioned above the mixer and are fixedly connected with the mixer through a chute; the auxiliary material bin is connected with an auxiliary material feeding hopper through a negative pressure conveying pipeline; a vacuum pump is respectively connected with the powder bin, the auxiliary material bin and the powder collecting bin through vacuum pipelines to provide power for negative pressure conveying, the buffer bin is positioned below the mixing machine and is fixedly connected with the mixing machine, and an outlet at the bottom of the buffer bin is positioned above the feeding end of the screw conveyor;
the packaging equipment is a packaging machine, and a buffer bin of the packaging machine is positioned below the discharge end of the screw conveyor and is used for receiving a mixture;
wherein the biomass fuel is agricultural and forestry waste.
2. The system of claim 1, wherein the hot blast stove is further connected with a first dust removing device, the first dust removing device comprises a bag-type dust remover and an induced draft fan, the hot blast stove is connected with the bag-type dust remover and the induced draft fan through a dust removing pipeline, and finally the exhaust gas is discharged after being subjected to dust removal through the dust removing pipeline.
3. The system of claim 1, wherein the discharge end of the drum dryer is further connected to a second dust removing device, the second dust removing device comprises a cyclone dust collector and an induced draft fan, the discharge end of the drum dryer is connected to the cyclone dust collector, the cyclone dust collector is connected to the induced draft fan through a dust removing pipeline, and finally the hot air for drying the biomass is discharged after being dedusted through the dust removing pipeline.
CN201611112745.2A 2016-12-07 2016-12-07 Process and system for producing biomass active filler for plywood Active CN108162102B (en)

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