JP2011132469A - Recycled solid fuel derived from waste culture medium and apparatus for producing recycled solid fuel using waste culture medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recycled solid fuel derived from waste culture medium having a structure produced at a low cost even with a waste culture medium left immediately after mushroom cultivation or a waste culture medium in which parts of mushrooms remain is used as a raw material and to provide an apparatus for producing recycled solid fuel using the medium. <P>SOLUTION: The recycled solid fuel derived from a waste culture medium is characterized by being formed by mixing under heating a waste culture medium in a state mixed with at least the stone veneers of mushrooms with a waste resin is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a recycled solid fuel using a waste medium of straw and a recycled solid fuel production apparatus using the waste medium.

  In the artificial cultivation of straw, mediums derived from plants such as sawdust and corn cob are often used. After artificial cultivation of straw using such plant-derived medium, some waste medium is reused by composting, but most waste medium is discarded. Yes.

  In recent years, in addition to increasing restrictions on the disposal of waste culture medium, disposal of waste culture medium has to be costly, which increases the production cost of grape growers and The environment is getting worse. Therefore, a so-called biomass fuel production method using a waste medium generated after artificial cultivation of straw as a raw material has been proposed (Patent Document 1). The biomass fuel thus obtained has made it possible to reduce the amount of waste medium discarded and reduce the fuel cost required for artificial cultivation of straw.

JP 2008-120890 A

As disclosed in Patent Document 1, the water content of the waste medium after finishing the artificial cultivation of straw is almost as high as 60% or more. Therefore, in order to dry the waste medium, a method of storing in a stock yard for a certain period is often employed. In this case, there are space issues such as the need to secure a stockyard near the manufacturing site for recycled solid fuel, and issues related to management costs.
On the other hand, when the step of drying the waste medium in the stock yard is omitted, and when trying to use the waste medium immediately after cultivation as a raw material for fuel, the waste medium with a high water content must be dried. I must. That is, there is a problem relating to the cost of manufacturing a recycled solid fuel, such as a situation where fuel is required to manufacture the recycled fuel. Furthermore, depending on the kind of cocoon, it may be cultivated in a state in which a part of the cocoon or part of the fruit body is left in the culture medium in the cultivation container. Thus, when a part of the soot remains in the culture medium, the water content of the waste culture medium is further increased, and the problem of an increase in the production cost of recycled solid fuel using the waste culture medium becomes serious.

  Therefore, the present invention provides a waste medium having a configuration that can be produced at low cost even if the waste medium immediately after artificial cultivation of straw is used as a raw material, or even if a waste medium in which a part of the straw remains is used as a raw material. It aims at providing the recycled solid fuel used and the recycling solid fuel manufacturing apparatus using a waste culture medium.

In order to solve the above-mentioned problems, the present invention has been intensively studied, and as a result, has come up with a suitable configuration in the production of recycled solid fuel using a waste medium after artificial cultivation of straw.
That is, it is a recycled solid fuel using a waste medium, which is formed by heating and mixing a waste medium in a state where at least stone bumps are mixed with a waste resin.

  Also, a hopper, a heating mixer that heats and mixes the waste culture medium and waste resin charged in the hopper, and a recycle solid fuel that is connected to the heating mixer and heated and mixed by the heating mixer are discharged. There is also an invention as a recycle solid fuel manufacturing apparatus using a waste culture medium characterized by having a discharge port block in which a plurality of discharge ports are formed.

According to the recycled solid fuel using the waste culture medium and the recycled solid fuel production apparatus using the waste culture medium according to the present invention, the waste culture medium in which the waste resin is mixed is heated and mixed. Due to this heat generation, the waste medium can be dried, and even if it is a waste medium having a high water content immediately after artificial cultivation of straw, it is possible to obtain a recycled solid fuel immediately and at a low cost.
Thus, even if it is a waste culture medium with a high moisture content, since a recycled solid fuel is obtained, the space problem and the manufacturing cost problem can be solved as in the past. In addition, it can be expected to expand its use as a substitute for fossil fuels, and it can contribute to reducing carbon dioxide emissions and extending the life of industrial waste disposal sites.

It is a schematic front view of the recycling solid fuel manufacturing apparatus using the waste culture medium in 1st Embodiment. It is an expansion see-through | perspective front view of a discharge port block. It is an expansion see-through | perspective front view for demonstrating the arrangement | positioning state of a discharge path. It is a schematic front view of the resin waste processing apparatus which shows an example of other embodiment. It is an enlarged front view of the discharge port block part of FIG.

Hereinafter, an embodiment of a manufacturing apparatus of a recycle solid fuel using a waste culture medium concerning the present invention is described based on a drawing. In this embodiment, as an example of the waste resin, a synthetic resin sheet called a so-called agricultural mulch is illustrated, but the waste resin in the present invention is not limited to the agricultural mulch, so-called a greenhouse. Of course, it is possible to use a waste vinyl sheet after being used in the above, a used resin container (waste resin container), or the like.
In addition, the waste medium in the present embodiment refers to a waste medium generated after the artificial cultivation of eringi koji, and in the waste medium, a part of fruiting body, a stone bump, and a fungus bed part are mixed. Is assumed.

  FIG. 1 is a schematic front view of a recycled solid fuel production apparatus using a waste medium in the present embodiment. FIG. 2 is an enlarged perspective front view of the discharge port block. FIG. 3 is an enlarged perspective front view for explaining an arrangement state of the discharge path. The recycle solid fuel manufacturing apparatus 50 using a waste medium in the present embodiment includes a hopper 10 that is a material input port, a screw conveyor 20 that is a heating mixer, and a discharge port block 30.

In the hopper 10, the waste culture medium immediately after the artificial cultivation of the eringi rice cake is taken out from the cultivation container and the waste product of the agricultural mulch after use are input. In the waste medium that is a part of the raw material that is input to the hopper 10 as a part of the raw material, there is a residue having a high water content such as a swordbump of the eringi moth and a part of the fruiting body, and a fungal bed part of the eringi moth. Although they may be mixed, it is not necessary to separate these high water content residues from the waste medium. Moreover, it is preferable to introduce the agricultural mulch waste product, which is a waste resin to be put into the hopper 10 as a raw material together with the waste medium, that has been cut to a required length by a crusher or the like in advance. The input mass of the agricultural mulch waste is preferably about 90:10 to 95: 5 with respect to the input mass of the waste medium having a water content of about 60%.
The hopper 10 may be provided with a lid (not shown) that covers the charging port. By disposing the lid on the hopper 10, it is possible to prevent the odor from being emitted from the waste culture medium and the agricultural mulch waste.

A waste culture medium (hereinafter simply referred to as a waste culture medium) in which a part of the eringi mash introduced into the hopper 10 is mixed is subjected to a heating process and a mixing process in parallel by the screw conveyor 20 connected to the bottom of the hopper 10. . In general, the screw conveyor 20 is formed in a configuration in which the cross-sectional area of the transport path 22 decreases (the cross-sectional area on the downstream side of the transport path 22 decreases) as the object to be transported is transported as shown in FIG. . Therefore, compression heat is generated from the waste culture medium and the agricultural multi-use waste conveyed in the screw conveyor 20. The waste culture medium and agricultural mulch waste are heated by the compression heat, and the water content of the mixture of the waste culture medium and agricultural mulch waste can be reduced. The solid fuel can be molded by compressing the waste medium that has been subjected to the moisture content reduction process and the agricultural mulch waste product.
The screw conveyor 20 is preferably provided with a steam discharge portion 24 that discharges water vapor generated when being compressed and conveyed through the conveyance path 22 in the screw conveyor 20 to the outside of the screw conveyor 20. In addition, an iron discharge block 30 is attached to the downstream side of the transport path 22 so as to close the transport path 22.

As shown in FIG. 2, the discharge port block 30 is formed with a plurality of discharge passages 32 penetrating the discharge port block 30 in the member thickness direction from the screw conveyor 20 side.
Further, as shown in FIG. 3, in the cross section of the transport path 22 in the direction orthogonal to the transport direction, the transport path passes from the central axis AX of the transport path 22 through the intermediate positions of the discharge paths 32, 32,. When divided by lines L1, L2, L3, L4 extending outward from the cross section of 22, the discharge ports 32 are arranged in such an arrangement that the areas of the sections A1, A2, A3, A4 are equal. Further, each discharge path 32 is formed such that the central axes ax, ax,... Of the discharge paths 32, 32,.

  As described above, since the discharge port block 30 is made of iron, the specific heat of the discharge block 30 is high. Thereby, the compression heat generated in the conveying path 22 of the screw conveyor 20 can be accumulated in the discharge port block 30. In addition, the mixture of the waste culture medium and the agricultural mulch waste product that has been heated and mixed (heated and compressed) in the carry-out path 22 of the screw conveyor 20 is branched into a plurality of discharge paths 32, 32,. Become. By the above, among the mixture of waste culture media and agricultural mulch waste products, the portions that are not in direct contact with the inner wall surface of the conveyance path 22 in the conveyance path 22 of the screw conveyor 20 are each discharged in the discharge port block 30. It is possible to sufficiently perform the heat treatment by contacting the inner wall surfaces of 32, 32,.

  In this embodiment, since the discharge port block 30 is provided with a plurality of discharge paths 32, 32,..., The amount of reduction in the cross-sectional area of the discharge path 32 relative to the cross-sectional area of the transport path 22 of the screw conveyor 20 is suppressed. be able to. Thereby, the conveyance speed of the mixture of the waste culture medium and the agricultural mulch waste product in the discharge port block 30 can be made as low as possible, and the waste medium and the agricultural mulch are also discarded in the discharge port block 30. Sufficient heat treatment can be performed on the product mixture. As described above, according to the recycled solid fuel manufacturing apparatus 50 according to the present embodiment, the entire mixture of the waste culture medium and the agricultural mulch waste product can be uniformly and sufficiently heat-treated, and can be recycled in a uniform state. A solid fuel can be obtained. Therefore, extremely high quality recycled solid fuel can be obtained.

(Example)
A part of the fruiting body of eringi persimmon remains (with stone bumps), under the condition that the input mass of the waste product of agricultural mulch is 7 kg with respect to the input mass of 100 kg of the waste medium whose water content is 60% An example of manufacturing recycled solid fuel will be described.
The waste culture medium thrown into the hopper 10 and the agricultural mulch waste are conveyed through the conveyance path 22 while being heated and mixed by the screw conveyor 20. After passing through the conveyance path 22, it is branched into a plurality of discharge paths 32 formed in the discharge port block 30, heated again in the discharge port block 30, and then from the outlet side (discharge port) of the discharge path 32. Discharged. The water content of the recycled solid fuel thus produced was measured and found to be about 7%.

  Further, when the amount of heat generated per unit mass of the recycled solid fuel produced according to this embodiment was analyzed, it was found that the amount of heat generated was the same as the amount of heat generated per unit mass of coal. This is because the recycled solid fuel according to the present embodiment is formed in a state where the agricultural mulch waste products are mixed, and compared with the generated calorific value of the recycled solid fuel manufactured using only the waste medium. This is considered to be because the amount of heat generated by the recycled solid fuel in the present embodiment can be greatly increased.

  Compared to the present embodiment, the agricultural mulch is disposed on the entire side surface of the recycled solid fuel discharged from the outlet side of the discharge path 32 by increasing the input ratio of the agricultural mulch waste mixed with the waste medium. The molten resin obtained by melting the product may be coated. Thus, by applying a resin coating to the outer surface of the recycled solid fuel, absorption of moisture into the recycled solid fuel can be prevented. Thereby, in addition to maintaining the water content of the recycled solid fuel during production over a long period of time, it is extremely advantageous in that the amount of heat as the recycled solid fuel can be further increased by the resin of the coated portion.

As mentioned above, although the recycle solid fuel and the recycle solid fuel manufacturing apparatus 50 concerning this invention were demonstrated in detail based on embodiment, this invention is not limited to the above embodiment.
For example, in the present embodiment, the discharge port 32 is formed with an arrangement in which the central axis ax of the discharge path 32 is arranged parallel to the central axis AX of the conveyance path 22 of the screw conveyor 20 in the discharge port block 30. However, the central axis ax of the discharge path 32 may be formed in an array that intersects in either the upstream or downstream direction of the central axis AX of the transport path 22. Thereby, the extension of the discharge path 32 can be lengthened, the heat treatment time in the discharge port block 30 can be extended, and the recycled solid fuel that has been dried (heat treated) more reliably can be obtained.

By adopting a form in which the central axes of the transport path 22 and the discharge path 32 intersect each other on the extension of the transport direction of the mixture, the recycled solid fuel discharged from the respective discharge paths 32 can be integrated. On the contrary, if the form which crosses the center axis line of the conveyance path 22 and the discharge path 32 on the extension on the opposite side (upstream side) from the conveyance direction of the mixture is adopted, the recycle discharged from each discharge path 32 Solid fuel can be reliably separated.
The condition for intersecting the center line of the transport path 22 and the discharge path 32 may be appropriately selected according to the form required for the recycled solid fuel.

  Further, as shown in FIG. 4, a cutting device 40 for cutting the recycled solid fuel discharged from the discharge passage 32 is arranged at the discharge side end portion (end portion of the discharge port block 30) of the recycled solid fuel production device 50. You may set up. As shown in FIG. 5, the cutting device 40 includes a rotary blade 42 that rotates around a rotation axis parallel to the axis AX of the discharge path 22 and a rotary power unit 44 of the rotary blade 42 at the opening portion of the discharge path 32. Have. In FIG. 5, a motor is employed as the rotational power unit 44. By setting the output of the rotary power unit 44 to be adjustable, the rotational speed of the rotary blade 42 can be changed, and the length dimension (size) of the recycled solid fuel can be changed as appropriate. The rotary blade 42 is illustrated as a blade-shaped blade, but if a so-called thread saw type rotary blade formed by stretching a steel wire or the like on a holding portion is employed, the recycled solid fuel to the rotary blade 42 is used. It is possible to prevent sharpness deterioration due to adhesion.

  5 shows a form in which a motor is used as the rotational power unit 44 of the cutting device 40. As a modification of the rotational power unit 44, a power conversion mechanism that uses the power of the screw conveyor 20 as rotational power is used. It can also be adopted. A reduction gear can be used as this power conversion mechanism. Here, of course, if a reduction gear with adjustable reduction ratio is employed, the length dimension (size) of the recycled solid fuel can be appropriately changed.

DESCRIPTION OF SYMBOLS 10 Hopper 20 Screw conveyor 22 Conveyance path 24 Steam discharge part 30 Discharge port block 32 Discharge path 40 Cutting apparatus 42 Rotary blade 44 Rotation power part 50 Recycled solid fuel manufacturing apparatus

Claims (5)

  A recycled solid fuel using a waste culture medium, characterized in that it is formed by heating and mixing a waste culture medium in which at least stone bumps are mixed with a waste resin.   The recycle solid fuel using a waste medium according to claim 1, wherein the heating and mixing is performed by a screw conveyor.   The recycled solid fuel using a waste medium according to claim 1 or 2, wherein the soot is an eringi soot.   A hopper, a heating mixer that heats and mixes the waste medium and waste resin charged in the hopper, and a waste gas that is connected to the heating mixer and discharges recycled solid fuel obtained by heating and mixing with the heating mixer. An apparatus for producing a recycled solid fuel using a waste culture medium, comprising a discharge port block having a plurality of outlets.   The central axis in the discharge direction of the recycled solid fuel at the discharge port is formed in an array intersecting with the central axis in the transport direction of the waste medium and the waste resin in the heating mixer. Recycled solid fuel manufacturing apparatus as described.

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