JP4430423B2 - Treatment method for wood-based industrial waste - Google Patents

Description

  The present invention is a method for treating wood-based industrial waste as a resin molded product by crushing wood-based industrial waste, impregnating the wood-chip raw material with a phenol resin, and compression-molding the wood-chip raw material impregnated with the phenol resin. About.

Currently, approximately 10 million tons of waste is discharged annually in Japan. These wastes include used plastic bottles, plastic wrapping films, plastic bags, paper bags, and cup noodles that are discharged at home. It comes out when forming packaging materials such as food containers, etc., and containers and packaging waste (general waste) such as containers, candy and toys, aluminum cans, steel cans, glass bottles, etc. There are scraps, demolition materials for houses demolished by demolition contractors, and industrial waste such as bark discharged from lumber contractors.
Such waste has been treated by incineration or landfill, but the problem of dioxin emissions due to incineration and the landfill space has been drastically reduced. It is happening. In addition, sludge, incineration slag, volcanic ash slag, etc. discharged from incinerators and steelworks can only be disposed of at the final disposal site and are increasing.
In addition, it is pointed out that there is a problem from the viewpoint of resource protection if many waste materials are discharged from building waste materials, civil engineering waste materials, etc., and only incinerating them.
Therefore, promotion of material recycling that effectively uses such waste as a resource is desired.

By the way, waste containers and packaging discharged from ordinary households are usually separated into containers, packaging materials, for example, plastic bottles, aluminum cans, paper, etc. These containers and packaging waste are contaminated with impurities such as various resins, papers, aluminum foil, metals, etc., the ingredients are unknown, and dirt, etc. It was difficult to recycle this waste.
In addition, industrial waste discharged from factories, etc., can be judged to some extent, but in this case as well, application development is still not progressing, and there is no choice but to rely on treatment by incineration or landfill disposal. Currently, material recycling is not progressing.
Therefore, in recent years, a technique for manufacturing a molded product by using various wastes, reducing the amount of wastes, and promoting material recycling has been tried.

One of them is a waste treatment system proposed by the present applicant. (See Patent Document 1)
This is to collect at least one resinous waste of resinous containers and packaging waste containing impurities such as containers or packaging that are not required when the product is consumed, and resinous industrial waste containing impurities. Resin waste collection process,
A resin waste coarse pulverization step for roughly pulverizing the resin waste containing impurities recovered in the resin waste recovery step;
A separation step of separating the resin pulverized product and the impurity pulverized product obtained in this resin waste coarse pulverization step according to their specific gravity difference;
And a resin pulverized material transporting step for transporting a specific type of resin pulverized material obtained in this separation step to a resin molding plant.

This technology includes a resin waste recovery step, a resin waste coarse pulverization step, a separation step, and a resin pulverized material transfer step. The recovered resin waste is the resin waste It is coarsely pulverized in the coarse pulverization step, separated into a certain type to some extent in the separation step, pretreated, and further processed in the resin pulverized product conveying step to obtain a molded product.
However, in the case of this technique, in order to produce a molded product, pretreatment consisting of a separation process due to a difference in specific gravity is necessary, and there is a complaint that the cost of the waste treatment system is high.

  In particular, when processing waste such as building waste, it is desired to develop a waste processing method with lower cost. Conventionally, as a technology that can be made cheaper in cost, there is a technology in which a wood-based waste material is crushed into chips and bonded with a phenol resin to be reused as a board. (See Patent Document 2)

  This is achieved by placing a surface material made of a material excellent in phenol resin permeability on both or either of the front and back surfaces of a wood chip material impregnated with 20 to 40 wt% of a phenol resin. It is formed by impregnating with a phenol resin softened in the course of pressure and heating and integrating it into a dense structure by cooling and solidifying after compressing the wood chip material.

  This technology pulverizes building waste materials, etc. into chips of about 6 mm in diameter, impregnates the crushed wood chips (raw wood raw material) into a resol-type phenolic resin tank, maintains this in an impregnated state for an appropriate time, and impregnates the wood The chip is taken out to evaporate methanol, and there is a problem that it is difficult to adjust the residual amount of phenol resin for wood.

In addition, it is difficult to impregnate the wood material with a predetermined amount of phenol resin, and it is hardened by heating and causes plastic flow, so the phenol resin must be handled well. Yes.
In order to remove the surplus components of the wood chip material impregnated with phenolic resin, it is necessary to wait for transpiration after a while. In this case, until the transpiration is uneven or depending on the climate and environment However, there was a problem in terms of quality control, such as the length of time, and the recycling method for wood-based industrial waste could not be simplified.
JP 2003-080520 A Utility Model Registration No. 3080504

  Therefore, the present invention proposes a method for treating wood-based industrial waste that is impregnated with wood chip material and phenolic resin and molded into a resin molded product. An object of the present invention is to provide a method for treating wood-based industrial waste, including a step of producing a resin molded product.

The invention of claim 1 collects wood-based industrial waste, crushes the wood-based industrial waste containing the recovered impurities, removes impurities, takes out only the wood piece raw material 2, and adds phenol to the wood piece raw material 2 A method of treating wood-based industrial waste as a resin molded article by impregnating resin 3 and compression-molding wood chip material 2 impregnated with phenolic resin 3;
When impregnating the wood chip material 2 with the phenol resin 3,
Weigh the wooden piece raw material 2 from which impurities have been removed and put it into a predetermined amount of impregnated car 4,
The impregnated basket 4 is put into a phenolic resin tank 10 for each car, and the wood raw material 2 is impregnated with the phenolic resin 3, and then the impregnated car 4 is rotated to separate the excess phenolic resin 3 ,
Thereafter, the wood chip raw material 2 from which the excess phenolic resin 3 was removed was put into the mold 14 and compression-molded .

According to invention of Claim 1, the method of processing a wooden industrial waste collect | recovers wooden industrial waste, crushes the wooden industrial waste containing the collect | recovered impurity, removes an impurity, This is a method of manufacturing a resin molded article by these steps, in which only the wood chip material 2 is taken out, the wood material 2 is impregnated with the phenol resin 3, and the wood material 2 impregnated with the phenol resin 3 is compression-molded.
Then, when impregnating the phenolic resin 3 into the wood piece raw material 2, the wood piece raw material 2 from which impurities are removed is weighed and put into a predetermined amount of the impregnated car 4, and the impregnated car 4 is put into the phenol resin tank 10 for each car and the wood piece raw material By impregnating 2 with the phenol resin 3, the quantified wood chip material 2 can be efficiently impregnated with the necessary and sufficient amount of the phenol resin 3.
Further, by rotating the impregnated basket 4 to separate the excess phenolic resin 3, the wood chip material 2 can be uniformly impregnated with the phenolic resin 3 and the quality can be controlled, and the surplus phenolic resin 3 can be managed. By separating the phenol resin, the time can be shortened even when the phenol resin is cured in a later step.
Furthermore, since the separated excess phenol resin 3 is returned to the original phenol resin tank 10 from the discharge port 13 and reused, there is no waste and the cost is reduced.

The process of treating wood-based industrial waste as a resin molded product consists of a wood chip material crushing process, a metering process, an impregnation process, a rotation process, and a pressure drying process. The wooden industrial waste is crushed, impurities are removed, and then the wood chip raw material 2 is weighed to a predetermined amount in the weighing process, and the phenol resin tank 10 is impregnated with the wood chip raw material 2 weighed in the impregnation process. Next, in the rotation process, excess phenol resin 3 is discharged. Finally, in the pressure drying process, the wood chip material 2 impregnated with the phenol resin is put into a mold and pressed, dried by hot air, and resin molded. Manufacturing goods.

The wood chip material crushing process includes waste wood discharged when demolishing a building such as a house, waste wood discharged when demolishing furniture, wood scraps discharged during building construction, sawdust, etc. The wood-based industrial waste is crushed by a crusher 5 and formed into a piece of wood raw material 2 having a certain size. Next, this wood chip raw material 2 is sent to the wind power sorter 6, and a material having a higher specific gravity than the wood chip raw material 2 is sorted by the wind force. A material having a high specific gravity is discharged from the crusher 5, and the wood piece raw material 2 is sent to the wood piece raw material tank 7 for storage. The stored wood chip material 2 is passed through a simple iron removal device 8 and is removed by a predetermined amount measured by a measuring machine 9 while removing metal such as screws and nails.
At this time, it is preferable to adjust the moisture content of the waste material so as to be dried to 3 to 10 wt% or less so that the wood resin 2 is easily impregnated with the phenol resin 3. When the moisture content of the wood chip raw material 2 is adjusted to the above range, the pores of the wood chip raw material 2 exhibit a sponge-like absorption effect, and also keep the humiliating ability to spout liquid when a certain pressure is applied from the outside. Therefore, it is preferable.

  In the measuring step, the wood piece raw material 2 sent from the wood piece raw material crushing step is weighed to a predetermined amount. At this time, the wood chip raw material 2 is put into the impregnated basket 4.

  In the impregnation step, the wood chip raw material 2 put in the impregnated car 4 is impregnated in the phenol resin tank 10 as the impregnated car 4 and the wood raw material 2 is sufficiently impregnated with the phenol resin 3. At this time, the viscosity of the phenol resin tank 10 is controlled by the temperature controller 11 so that the phenol resin 3 has a viscosity suitable for sufficiently impregnating the wood chip material 2.

As the phenol resin 3, a resol type obtained by heating and reacting phenol and formaldehyde under a basic catalyst is used.
Since the phenol resin has a high viscosity, for example, it is preferable to dilute with a methanol solvent to obtain a viscosity capable of impregnation, and for example, it is preferable to mix resin: methanol at a ratio of about 7: 3.

The impregnation of the phenol resin 3, when subjected to the rotation process of the post-process, to the phenolic resin component is wood raw material 2, for example, preferably in the amount of residual 1 5-50 wt%, the impregnation ratio 1 5 was set to 50 wt%, when more than 5 0 wt%, the strength of the phenol resin increases, but economically be expensive, whereas, when it comes to 1 5 wt% or less, even once solidified, physical as moldings This is because the strength is insufficient.

In the rotation step, the wood piece raw material 2 impregnated in the phenol resin tank 10 is put into the rotating machine 12 as the impregnated basket 4 and the excess phenol resin 3 of the wood piece raw material 2 is separated by centrifugal force by rotation. The excess phenol resin 3 separated at this time is returned to the original phenol resin tank 10 from the discharge port and reused.

  In the pressure drying step, the wood chip raw material 2 from which the excess phenol resin 3 is removed is put into the mold 14 and pressed by a hot press. Next, the wood chip material 2 put into the mold 14 is dried by heating with hot air and ventilation. Here, if the wood chip raw material 2 and the phenol resin 3 put into the mold form are combined to form a resin molded product, the product is removed from the mold.

According to the method for treating wood-based industrial waste according to the present invention, on the premise of material recycling, the wood-based industrial waste is crushed and the wood chip raw material 2 is impregnated in the phenol resin tank 10 to thereby obtain the phenol resin 3. Can be impregnated in a sufficient amount in the wood chip raw material 2, and the phenol resin 3 is uniformly impregnated by removing the excess phenol resin 3 by the rotating machine 12, so that the wood chip raw material 2 is suitable for the phenol resin. Proposing a recycling method for wood-based industrial waste that can be made into a residual amount, can produce a resin molded product in which the wood resin 2 is uniformly impregnated with the phenol resin 3 and can provide a low-cost and high-quality product. it can.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. In the embodiment shown in these figures, the phenol resin 3 used in the resin molded product manufacturing apparatus 1 is a mixture of phenol resin 58-62%, methanol 29-33%, phenol 7-8%, and moisture 0-2%. The example which used is shown.

As shown in FIG. 1, the resin molded product manufacturing apparatus 1 combines a wood chip raw material 2 with a phenol resin 3, immerses the wood chip raw material 2 in a phenol resin tank 10, and puts the phenol resin 3 into the wood chip raw material 2. By providing the temperature controller 11 that controls the viscosity to be appropriate for impregnation, the wood resin 2 can be sufficiently impregnated with the phenol resin 3. At this time, the temperature control is performed with the temperature controller 11 in a proper viscosity, whereby the phenol resin 3 can be prevented from being cured due to an increase in heat.
By using such a resin molded product manufacturing apparatus 1 to manufacture a resin molded product according to the process shown in FIG. 2, a method for treating wood-based industrial waste as a higher quality resin molded product is provided. Can be implemented.

  Here, the phenol resin 3 which is a thermosetting resin used in the present embodiment softens once when heated, but gradually becomes harder and finally hardens. As shown in FIG. 3, the large and small phenol resin molecules react with each other to be polymerized. This causes a phenomenon of curing.

Using such a resin molded product manufacturing apparatus 1 shown in FIG. 1, a resin molded product is manufactured according to the process of FIG.
First, the wooden industrial waste is crushed. Wood-based industrial waste includes wooden industrial waste discharged when demolishing buildings such as houses, wooden industrial waste discharged when dismantling furniture, and wood discharged during building construction. Mill materials, sawdust, etc. are used.

  This woody industrial waste is first put into the crusher 5 in the wood chip material crushing step. The wood-based industrial waste that has been input is crushed into a predetermined size to obtain a wood chip raw material 2. In the pulverization of the wood-based industrial waste, the moisture content is dried to 3 to 10 wt% or less, and when this is 3 to 10 wt% or less, the pores of the wood chip raw material 1 exhibit a sponge-like absorption effect. At the same time, it keeps the insulting property to spout liquid when a certain pressure is applied from the outside.

  Next, the wood piece raw material 2 is sent to the wind power sorter 6 and a material having a higher specific gravity than the wood piece raw material 2 is sorted by the wind force. For example, heavy concrete such as concrete pieces and glass pieces are discharged from the crusher 5, and the wood piece raw material 2 is sent to the wood piece raw material tank 7 for storage.

  Once stored, the wood chip material 2 passes through a simple iron removing device 8 to remove metal such as screws and nails. Thereby, miscellaneous metals and the like are also removed, and foreign substances other than the wood chip material 2 are removed together with the wind power sorter 6.

  Next, the wood chip material 2 is weighed by the weighing machine 9. At this time, the weighing machine 9 is provided with an impregnated basket 4 for receiving the wood piece raw material 2. This impregnated basket 4 is a rectangular parallelepiped made of metal. Four pillars are attached to the four corners of the bottom frame, and a metal mesh is provided on each surface, and a lid with a metal mesh provided with a metal frame is also provided. Provided. The wood chip raw material 2 is weighed into a predetermined amount in the impregnated basket 4 by a measuring machine 9 and when the predetermined amount is reached, the impregnated basket 4 is covered and impregnated in the phenol resin tank 10.

  Next, the wooden piece raw material 2 put in the impregnated basket 4 is impregnated in the phenol resin tank 10 as the impregnated basket 4, and the wooden piece raw material 2 is impregnated with the phenol resin 3 for a predetermined time. At this time, the phenol resin tank 10 is a solution obtained by dissolving the phenol resin 3 with a solvent such as methanol, and the phenol resin 3 is a resol type obtained by heating and reacting phenol with formaldehyde under a basic catalyst. Is used. Since the phenol resin 3 has a high viscosity, the phenol resin 3 is diluted with a methanol solvent to obtain a viscosity capable of impregnation. For example, resin: methanol is mixed at a ratio of about 7: 3. Moreover, the temperature inside the phenol resin tank 10 is stabilized by the temperature controller 11 to control the viscosity so that the phenol resin 3 has a viscosity suitable for sufficiently impregnating the wood chip material 2.

Here, the predetermined time means an appropriate time for impregnating the required amount of the phenolic resin 3, and the required amount is for evaporating (methanol) and removing the excess phenolic resin 3 in a later rotation process. This refers to the amount of 15-50 wt% of the phenolic resin remaining with respect to the wood chip raw material 2. The impregnation ratio was 1 5-50 wt% may exceeds 5 0 wt%, the strength of the phenol resin increases, but economically be expensive, whereas, if equal to or less than 15 wt%, even once solidified, as a product This is because the physical strength of is insufficient.

  By controlling the temperature of such a phenolic resin 3, curing of the phenolic resin due to heating can be prevented, or by maintaining the temperature at a suitable temperature, the amount of impregnation of the phenolic resin 3 into the wood chip material 2 can be increased. .

Next, the wood chip raw material 2 impregnated for a predetermined time is put into the rotating machine 12 as the impregnated car 4 and rotated for a predetermined time to remove excess phenolic resin 3. At this time, since the impregnated basket 4 has a wire net-like surface, excess phenol resin 3 coming out of the wood piece raw material 2 flows out of the impregnated car 4 through the gap of the wire net. The excess phenol resin 3 that has flowed out returns to the original phenol resin tank 10 from a discharge port 13 provided in the rotating machine 12 . Thereby, the excess phenol resin 3 can be reused, leading to cost reduction.

Moreover, by removing the excess phenol resin 3 by the rotating machine 12, the phenol resin 3 can be uniformly impregnated and the wood chip raw material 2 can be made into a suitable phenol resin impregnation amount. It is possible to provide a high-quality product that is uniformly bonded to 2.

Furthermore, in this rotating step, excess phenol resin 3 is removed, and the absolute amount of phenol resin 3 entangled with the wood chip material 2 is reduced, so that evaporation of methanol, which is a mixture of phenol resin 3, can be promoted. Then, the phenol resin 3 in a monomer (monomer) or oligomer (polymer) state is solidified and becomes a smooth state without a sticky feeling, so that the handling becomes easy.

  Next, the excess phenol resin 3 is removed, and the wooden piece raw material 2 in a smooth state is transferred from the impregnated basket 4 to the mold 14 and spread and filled in the mold. And it pressurizes with the following processes with the hot press machine 15. FIG.

  First, heat is gradually increased under pressure for about 60 minutes. Then, a crosslinking reaction is initiated between phenol and formalin, but only a slight reaction during this period at a relatively low temperature.

  Next, when the temperature reaches around 100 ° C., the temperature rise is stopped and the temperature is kept around 100 ° C. for about 30 minutes. Then, first, a kind of softening is induced in the phenol resin 3 as a reaction intermediate, and the phenol resin 3 impregnated in the wood chip raw material 2 is liquefied and is pressed by the applied pressure to penetrate the whole wood chip raw material 2. To go.

  Furthermore, if the temperature is maintained at around 100 ° C., the phenol resin 3 that has penetrated into the wood chip raw material 2 is also liquefied and oozes out due to pressure. At this time, the bulk volume of the wood chip raw material 2 suddenly increases. The phenomenon that the whole is compressed as if the sponge shrinks occurs. That is, when the softening of the resin reaches the maximum, the drag of the solidified resin that fixes the wood chip raw materials 2 to each other is lost, the entanglement is crushed by the external pressure, and the entire composition of the wood chip raw material 2 is like an insulting body. A shrinking phenomenon is triggered. As a result, the wood chip materials 2 are closely meshed with each other, and change into a dense composition structure.

  At this time, it is important to keep the temperature around 100 ° C. for about 30 minutes. If the temperature rises linearly without going through this step, the curing reaction starts immediately, and the resin toward the wood chip raw material 2 side It is difficult to penetrate and to change the structure with compression.

  After the composition of the wood chip material 2 is changed, heating is started again while increasing the pressure. At this time, hot air is fed by the hot air dryer 16 together with heating. Then, heating can be promoted and drying time can be promoted.

  And hardening reaction of the phenol resin 3 is started at 120-140 degreeC vicinity, a crosslinking reaction advances between molecules, and hardening reaction advances rapidly between the said softened resin. At the same time, the wood chip raw material 2 bites in by the pressing force by pressurization, and a hard structure is formed. That is, the penetrated phenolic resin 3 is cured to produce a binding force, and the wood chip raw materials 2 having a certain strength are entangled with each other to produce a biting effect, thereby obtaining a strong binding force in a double sense.

  As a result, the composition of the wood chip raw material 2 is solidified in a form converted into a dense structure. Therefore, the wood chip raw material 1 and the phenol resin 3 are integrally formed by a simple process through a series of processes, and a resin molded product having a fine overall structure and excellent physical strength is obtained.

It is the schematic which shows the resin molded product manufacturing apparatus 1 of this invention. It is the schematic which shows the manufacturing process of the resin molded product of this invention. It is a conceptual diagram which shows that the phenol resin 3 was heated and hardened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin molded product manufacturing apparatus 2 Wood piece raw material 3 Phenolic resin 4 Impregnation basket 5 Crusher 6 Wind sorter 7 Wood piece raw material tank 8 Simple iron removal machine 9 Weighing machine 10 Phenol resin tank 11 Temperature controller 12 Dip spin machine 13 Outlet 14 Form 15 Hot press 16 Hot air dryer

Claims (5)

Collecting wood-based industrial waste, crushing wood-based industrial waste containing the recovered impurities, removing impurities, taking out only the wood chip material, impregnating the wood material with the phenol resin, A method of treating wood-based industrial waste as a resin molded product by compression molding the impregnated wood piece raw material,
When impregnating phenolic resin into wood chip material,
Weigh out the wood chip material from which impurities have been removed, and put it into the impregnated basket.
Put the impregnated basket in a phenolic resin tank for each basket and impregnate the wood raw material with phenolic resin, then rotate the impregnated basket to separate excess phenolic resin ,
Thereafter, a wood-based industrial waste treatment method, wherein a wood chip material from which excess phenol resin is removed is put into a mold and compression-molded . In the processing method of the wooden industrial waste of Claim 1,
A method for treating wood-based industrial waste, comprising adjusting a moisture content of a wood chip material and drying to 3 to 10 wt% or less. In the processing method of the wooden type industrial waste of Claim 1,
A method for treating wood-based industrial waste, characterized in that a temperature controller is provided in a phenol resin tank, and the viscosity of the phenol resin is controlled by the temperature controller. In the processing method of the wooden type industrial waste of Claim 1 thru | or 3,
The method for treating wood based industrial waste, wherein the phenolic resin is a resol type phenolic resin. In the processing method of the wooden type industrial waste of Claim 1,
Method of processing wood industrial waste, characterized in that the phenolic resin component by rotating the impregnated car was the amount remaining 1 5-50 wt% with respect to wood raw material.

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