JP2020002321A - Fuel production apparatus using digested sludge - Google Patents

Abstract

To provide a fuel production apparatus using digested sludge which can effectively utilize both unnecessary wood and digested sludge and can achieve both effective utilization of a combustion device as a core and recycling.SOLUTION: A fuel production apparatus using digested sludge according to the present invention comprises: an impregnation portion for absorbing tar into wood chips to generate tar-impregnated chips, a mixing portion for mixing the tar-impregnated chips with digested sludge to generate chip-mixed sludge, a crushing portion for crushing the chip-mixed sludge to generate crushed chip-mixed sludge, and a molding portion for molding the crushed chip-mixed sludge into a predetermined shape to generate a fuel derived from the digested sludge. The wood chips are obtained from unnecessary wood.SELECTED DRAWING: Figure 1

Description

  The present invention provides a fuel manufacturing apparatus that utilizes wood and digested sludge, which have been difficult to dispose, to produce a fuel, and uses digested sludge, which enables recycling by making available wood and digested sludge having a disposal problem. About.

  In recent years, unnecessary trees are often cut down by reviewing forest plans. Also, along with the rise and fall of forestry, there has been an event that a large amount of thinned wood and waste wood are generated. In addition, there has been an event that a large number of fallen trees and driftwoods occur due to a disaster or the like. It is often troublesome to dispose of such large amounts of wood.

  For example, the former thinned wood and waste wood are difficult to use as effective wood, and must be disposed of. Or fallen trees and driftwood are naturally difficult to use as effective wood. Such fallen trees and driftwood must be disposed of. However, these waste materials and fallen trees, whether they are traders or municipalities, have difficulty in disposal methods and disposal costs. Due to the difficulty of this disposal, it is actually necessary to incinerate these waste materials and unnecessary wood such as fallen trees.

  In the case of incineration, it is necessary to secure a place for amortization and secure the amortization cost. This is a very troublesome problem for the related companies and local governments. There is also a problem that precious wood is only wasted because it is only incinerated. In addition, the combustion disposal emits a large amount of carbon dioxide, which is not preferable for the environment. Of course, the energy is wasted because the combustion is just disposal.

  As described above, there is a situation where it is difficult to dispose of unnecessary wood such as waste wood, fallen wood, and driftwood.

  On the other hand, there is a situation in which sludge called digested sludge is generated in large quantities in various places. Digested sludge is obtained after anaerobic fermentation of generated sludge to remove methane gas and the like to some extent. For example, at livestock sites, a large amount of sludge mixed with excrement such as manure is generated. Alternatively, a large amount of sludge is generated in a sewage treatment plant and a waste treatment plant. These sludges contain combustion components such as methane gas. Manure contains methane gas and the like.

  Disposing of the sludge containing the combustion component is not preferable from the viewpoint of safety and environmental protection. Further, it is not preferable from the viewpoint of safety and workability to perform the combustion treatment of the sludge as it is while the combustion component is still contained. Sludge often contains pathogenic bacteria, and it is not preferable to use sludge simply for landfill.

  For this reason, sludge containing a combustion component such as methane gas is subjected to anaerobic fermentation to reduce the combustion component. This is because the anaerobic fermentation greatly reduces combustion components from sludge. Digested sludge is obtained by reducing this combustion component. Also, sludge contains various pathogenic bacteria, which have been killed by anaerobic fermentation.

  The digested sludge thus obtained can be used, for example, as a fertilizer or a soil modifier.

  Thus, sludge containing combustion components and pathogenic bacteria is often converted into digestible sludge that can be reused. As a result, a large amount of digested sludge is generated in various places.

  However, digested sludge originally intended to be reused as a fertilizer or a soil modifier, etc., is presently inadequately recycled. This is because there is a problem that performance and workability are insufficient for using digested sludge as a fertilizer or a soil modifier. Alternatively, there is a problem that is not worth the cost. As described above, the digested sludge produced for the purpose of reuse as a fertilizer or a soil modifying agent has a problem that it is not used as such. After all, digested sludge is actually being landfilled or burned.

  On the other hand, a large amount of sludge containing combustion components continues to be generated, and accordingly, a large amount of digested sludge has also been generated.

  Thus, as well as the problem of disposing of unnecessary wood, there is also a problem of disposing of digested sludge. Thus, problems have arisen in the disposal of unnecessary wood and digested sludge, respectively.

  In this situation, gas engine power generation in which fuel is burned to generate power using a gas engine, and combustion heat generation using combustion heat for various purposes are used in various places. Gas engine power generation and combustion heat generation are realized by burning fuel in a combustion device.

  That is, there is an ongoing need for fuel. In a combustion apparatus using such a fuel, a biomass fuel, various organic fuels, and a specially prepared fuel, such as a fossil fuel, are used. However, there is a problem that these fuels are unable to realize a recycling-oriented society due to their environmental impact and not being recycled.

  In this way, there is a problem of disposing of unnecessary wood, a problem of disposing of digested sludge, and a situation in which a combustion device that generates combustion heat requires recyclable fuel. . Under such circumstances, a technique for producing fuel by recycling has been proposed (for example, see Patent Documents 1 and 2).

JP 2007-169398 A JP 2010-215778 A

  Patent Literature 1 discloses a crushing drying and carbonization system including a box feeder 1 that receives and carries out an organic material, a crushing dryer 6 that crushes and dry the organic material, and a carbonization furnace 16 that carbonizes the organic material by indirect heating. , A receiving tank 31 for storing waste liquid such as waste mineral oil and waste oil, a drum hanging rotary machine 32, a solid transport conveyor 34 for separating and transporting solids 60 in liquid, and a stirring tank 40 for storing and stirring waste liquid , A box feeder 45 that receives and carries out the carbonized organic material, a carbonized organic material from the box feeder 45, and a waste liquid from which solids have been removed in the waste liquid system. Having a kneading machine 50 and a continuous kneader 58 that granulates a kneaded product of an organic material and a waste liquid material by the kneading machine 50 to obtain a solidified fuel 70 having a diameter of about 1 to 5 mm. The fee production system, is disclosed.

  Patent Literature 1 discloses that an organic material is pulverized and mixed with a love liquid as a combustion component to produce a fuel.

  However, Patent Literature 1 does not disclose recycling unnecessary wood or digested sludge which is in trouble for disposal as described in the related art. There is a problem that it is not possible to produce a fuel by reusing them. Further, the waste liquid to be mixed is obtained irrespective of the organic matter to be reused, and the completeness as recycling is insufficient. Insufficient maturity causes problems in cost, manufacturing processes, and local problem solving.

  Patent Document 2 discloses that waste sludge A is crushed by a crusher 2, the crushed material obtained by the crushing is crushed and mixed with a conditioned waste oil X by a crushing mixer 4, and a mixture Y obtained by the crushing and mixing is obtained. A method for producing a waste oil-based solid fuel, which is mixed with a waste oil absorbent W, is provided.

  Patent Literature 2, like Patent Literature 1, does not disclose recycling unnecessary wood or digested sludge which is in trouble for disposal as described in the related art. There is a problem that it is not possible to produce a fuel by reusing them. Further, the waste liquid to be mixed is obtained irrespective of the organic matter to be reused, and the completeness as recycling is insufficient. Insufficient maturity causes problems in cost, manufacturing processes, and local problem solving.

  As described above, the conventional technology has a problem in that it is not possible to effectively use unnecessary wood and digested sludge which are in trouble for disposal. In addition, there is a problem that when the fuel is used for the purpose of effective use, the circulation coordination with the combustion device cannot be performed. As a result, there was a problem that it was not possible to realize recycling in an area where disposal of unnecessary wood and the like was troubled.

  An object of the present invention is to provide a fuel production apparatus using digested sludge, which can effectively utilize both unnecessary wood and digested sludge, and can achieve both effective use of a combustion device as a core and recycling.

In view of the above problems, the fuel production apparatus using the digested sludge of the present invention is an impregnation unit that generates tar-impregnated chips by absorbing tar into wood chips,
A mixing section that mixes the tar impregnated chips and digested sludge to generate chip mixed sludge, a pulverizing section that pulverizes chip mixed sludge to generate pulverized chip mixed sludge, and forms a pulverized chip mixed sludge into a predetermined shape. And a molding unit for producing fuel derived from digested sludge, and the wood chips are obtained from unnecessary wood.

  The fuel production apparatus using digested sludge of the present invention can produce fuel by effectively utilizing both unneeded wood such as fallen trees that are in trouble with disposal and digested sludge. The fuel produced can be used for combustion in a variety of situations and is useful in new production sites.

  The effective use of both unwanted wood and digested sludge can solve problems in areas where such disposal is problematic.

  Also, in the production of fuel, waste from combustion equipment that uses the unnecessary wood to obtain combustion heat can be used, so all the elements required in the fuel production process are unnecessary and recycled. Is obtained by As a result, the entire fuel manufacturing process is completely recycled.

FIG. 2 is a block diagram of a fuel manufacturing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a flowchart showing a tar manufacturing process according to Embodiment 1 of the present invention. FIG. 2 is a block diagram of a fuel manufacturing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a block diagram of a fuel manufacturing apparatus according to Embodiment 1 of the present invention. FIG. 3 is an internal configuration diagram of an impregnation unit according to Embodiment 1 of the present invention. It is a schematic diagram which shows the example of manufacture of the wood chip in Embodiment 1 of this invention. 9 is a flowchart of a fuel manufacturing method according to Embodiment 2 of the present invention.

A fuel production apparatus using digested sludge according to the first invention of the present invention is an impregnation unit that generates tar-impregnated chips by absorbing tar into wood chips,
A mixing section that mixes the tar impregnated chips and digested sludge to generate chip mixed sludge, a pulverizing section that pulverizes chip mixed sludge to generate pulverized chip mixed sludge, and forms a pulverized chip mixed sludge into a predetermined shape. And a molding unit for producing fuel derived from digested sludge, and the wood chips are obtained from unnecessary wood.

  With this configuration, it is possible to effectively use the unnecessary wood and digested sludge which are in trouble with the treatment.

  In the fuel production apparatus using digested sludge according to the second invention of the present invention, in addition to the first invention, the unnecessary wood includes at least one of a thinned wood, a waste wood, a driftwood, and a fallen tree.

  With this configuration, unnecessary wood that is difficult to treat in various regions can be effectively utilized as an efficient fuel.

  In the fuel production apparatus utilizing digested sludge according to the third invention of the present invention, in addition to the first or second invention, tar is obtained from a combustion apparatus for burning unnecessary wood to obtain combustion heat.

  With this configuration, tar is also derived from unnecessary wood, and fuel can be produced based on unnecessary raw materials.

  In the fuel production apparatus using digested sludge according to the fourth invention of the present invention, in addition to the third invention, the combustion device burns unnecessary wood to generate combustion heat, and tar extracted from the unnecessary wood is used. Is supplied as tar used in the impregnation section.

  With this configuration, tar can be obtained after the unnecessary wood is once used as fuel. Circulation levels up further.

  In the fuel production apparatus using digested sludge according to the fifth invention of the present invention, in addition to any one of the first to fourth inventions, a wood chip drying unit for drying wood chips before the impregnation unit is further provided. Prepare.

  With this configuration, the degree of drying of the wood chips advances, and the degree of tar impregnation increases.

In the fuel production apparatus using digested sludge according to the sixth invention of the present invention, in addition to any one of the first to fifth inventions, the impregnating section includes an air pressure reducing section,
In the impregnating unit, the tar is absorbed by the wood chips by reducing the air pressure by the air reducing unit.

  This configuration increases the degree of tar impregnation of the wood chips.

  In the fuel manufacturing apparatus using digested sludge according to the seventh aspect of the present invention, in addition to any one of the first to sixth aspects, the digested sludge fed into the mixing section is previously dried.

  With this configuration, the combustion efficiency of the manufactured fuel is increased.

  In the fuel production apparatus utilizing digested sludge according to the eighth invention of the present invention, in addition to any one of the first to seventh inventions, digested sludge is used in at least one of the livestock industry, sewage treatment industry and sewage treatment industry. Arising from one.

With this configuration, unnecessary digested sludge can be effectively used as fuel.
In a fuel production apparatus using digested sludge according to a ninth aspect of the present invention, in addition to any one of the first to eighth aspects, the mixing section further mixes charcoal.
With this configuration, the fuel combustion ability can be further increased.

The fuel production method using digested sludge according to the tenth invention of the present invention is an impregnation step of producing tar impregnated chips by absorbing tar into wood chips,
A mixing step of mixing the tar impregnated chips and the digested sludge to produce chip mixed sludge,
A pulverizing step of pulverizing the chip mixed sludge to generate a pulverized chip mixed sludge,
A molding step of molding the crushed chip mixed sludge into a predetermined shape to produce a fuel derived from digested sludge,
Wood chips are obtained from unwanted wood.

  With this configuration, it is possible to effectively use the unnecessary wood and digested sludge which are in trouble with the treatment.

In the fuel production method using digested sludge according to the eleventh invention of the present invention, in addition to the tenth invention, unnecessary wood includes at least one of thinned wood, waste wood, driftwood, fallen wood,
Digested sludge originates from at least one of the livestock, sewage and sewage industries.

  With this configuration, unnecessary wood and unnecessary digested sludge can be effectively used.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  (Embodiment 1)

(Overview)
First, an overall outline will be described.

  FIG. 1 is a block diagram of a fuel production apparatus according to Embodiment 1 of the present invention. FIG. 1 schematically shows a fuel production apparatus 1 showing elements and processes. The fuel production device 1 utilizes digested sludge. The fuel manufacturing apparatus 1 includes an impregnation unit 2, a mixing unit 3, a crushing unit 4, and a molding unit 5. Further, after the molding in the molding section 5, a drying section 8 for drying the fuel having the molded shape may be provided.

  The impregnating unit 2 generates impregnated chips by causing the wood chips to absorb tar. The wood chips and the tar are put in and processed so that the tar is absorbed by the wood chips. For example, the impregnating section 2 is provided with a container such as a hopper, into which wood chips and tar are charged. In addition, the impregnation of the wood chips with tar can be realized by stirring or immersing for a certain time in the container.

  By the impregnation in the impregnation section 2, tar-impregnated chips impregnated with tar are generated. The tar-impregnated chips are moved to the next element, the mixing section 3. Also, as shown in FIG. 1 (FIGS. 3 and 4 described later),

  The mixing unit 3 mixes the tar-impregnated chips and the digested sludge to generate chip-mixed sludge. As described in the related art, digested sludge is obtained by anaerobically fermenting sludge mixed with excrement such as manure to reduce combustion components. It continues to occur at livestock and sewage treatment sites.

  Digested sludge has a combustion component removed (reduced) and is not suitable for producing a combustion material. However, there are situations in which landfills, incineration, and neglect have been used without being used for their original purpose such as soil improvement. The increase and leaving of the digested sludge is a major problem.

  By mixing the tar-impregnated chips and the digested sludge in the mixing section 3, the combustion components are mixed with the digested sludge from which the combustion components have been removed. The tar in the tar impregnated chips is a combustion component, and the digestion sludge can obtain this combustion component by mixing in the mixing section 3. What obtained this combustion component is chip mixed sludge.

  The mixing section 3 has a container and a stirring function, and may perform a process of mixing digested sludge and tar-impregnated chips.

  In the mixing section 3, it is also preferable to further mix charcoal. This charcoal is also obtained from unwanted wood. Unnecessary wood undergoes gasification and combustion in the combustion device, so that tar and charcoal are obtained. That is, the unnecessary wood that is in need of unnecessary can be reused. By impregnating coal in addition to tar, there is a merit that the combustion capacity of the fuel finally obtained is increased. FIG. 1 and the like show an embodiment in which this charcoal is obtained from unnecessary wood.

  The pulverizing section 4 pulverizes the chip mixed sludge. The mixed sludge chips may be pulverized by using a rotary blade having a pulverizing function. By being pulverized by the pulverizing section 4, pulverized chip mixed sludge is generated. The pulverized form facilitates molding in the molding section 5 described later. In addition, the quality of the molded fuel can be made uniform.

  The molding unit 5 molds the crushed chip mixed sludge into a predetermined shape. For example, it is molded into a shape such as a pellet shape or a square shape. By being molded into such a shape, it can be used as a fuel A (as a combustion material) for a combustion device or the like. The fuel A produced is derived from digested sludge. In other words, effective utilization of digested sludge, which has been difficult to dispose of, is achieved.

  The drying unit 8 dries the fuel having a shape such as a pellet shape molded by the molding unit 5. Through this drying, fuel A is obtained. The fuel obtained after the molding unit 5 may be grasped as fuel A, or the fuel obtained after the drying in the drying unit 8 may be grasped as fuel A. The fuel A obtained by drying in the drying unit 8 is a sufficient fuel that can be used.

  Wood chips are obtained from unnecessary wood. Wood chips can be obtained by cutting unnecessary wood into chips. The wood chips derived from the unnecessary wood are also a raw material of the fuel A to be manufactured. That is, the manufactured fuel A is also an effective use of unneeded wood that has been difficult to dispose.

  The fuel A to be produced may be used for a combustion device that generates combustion heat. For example, it may be used for a combustion device associated with a power generation device, or may be used for a combustion device associated with a heating device.

  As described above, the fuel manufacturing apparatus 1 according to the first embodiment can manufacture the fuel A using the unnecessary wood and the digested sludge which have been difficult to dispose or treat. This fuel A can be used effectively in various situations, and has less disadvantages in terms of resource depletion and environmental destruction than using fossil fuels and the like. This is because the fuel A is manufactured based on unnecessary raw materials.

(Unnecessary wood)
Unnecessary wood includes at least one of thinned wood, waste wood, driftwood, and fallen wood. In the fields of forestry and agriculture, thinning may occur. This is because thinned timber is produced as thinned wood for the care and maintenance of the forest.

  Alternatively, in the forestry processing industry, sawmills, wood processing business, etc., unused waste may be produced. Waste material may be generated at construction sites. Along with thinned wood, waste wood may be generated in various places.

  On the other hand, driftwood and fallen trees may occur due to natural disasters in addition to thinned wood and waste wood generated in such a business. Due to the recent effects of global warming, local torrential rains, large typhoons and heavy snowfall have caused many (and large) natural disasters such as landslides, landslides, floods, and river floods. When such a natural disaster occurs, a large amount of fallen trees and driftwood can occur. These driftwoods and fallen trees hinder recovery support in disaster areas. In addition, there is a current situation in areas where there is difficulty in treating these driftwoods and fallen trees. Driftwood and fallen wood are not only unnecessary, but also troublesome timber.

  Wood chips, one of the raw materials of the fuel A to be produced, are derived from such unnecessary wood. From this point, the fuel manufacturing apparatus 1 that manufactures the fuel A can realize effective utilization of unnecessary wood that is troubled by the treatment in addition to digested sludge that is troubled by the treatment.

(tar)
The tar used in the impregnation section 2 and the charcoal used in the mixing section 3 can be obtained from the burning of unwanted wood. FIG. 2 is a flowchart showing a tar manufacturing process according to Embodiment 1 of the present invention. Here, unnecessary wood may not be burned by general combustion but may be burned by gasification combustion in a gasification power generation device or the like. A large amount of tar and charcoal is generated from unnecessary wood by the combustion in the gasification combustion. This tar or charcoal is used in the impregnation section 2 and the mixing section 3.

  Unnecessary wood becomes a raw material of the wood chips used in the impregnation section 2 as described above, and also becomes a raw material of the tar. Unnecessary wood is pulverized by the chipping device 11 into chips. Thereafter, the wood in chip form is dried by the drying device 12 to produce wood chips.

  A part of this wood chip is used for the fuel production device 1 as described above. On the other hand, wood chips may be used as they are in the combustion device 13 for generating combustion gas (combustion heat). For example, there is a generator using combustion gas. In this generator, a combustion device 13 is used. This is because the combustion device 13 generates combustion gas by combustion.

  Power generation devices that use combustion gas are often used at local sites, such as construction sites, construction sites, and disaster recovery sites. In such a site, it is often more appropriate to use unnecessary wood that is easily available at the site than to transport fossil fuel and use it as fuel for a power generation device. For this reason, it is appropriate for a power generation device using combustion gas to use a wood chip made of unnecessary wood as a raw material for the combustion device.

  Therefore, a part of the wood chips manufactured by the drying device 12 is used for the fuel manufacturing device 1 and a part thereof is used for the combustion device 13.

  Here, when the wood chips are burned in the combustion device 13, tar is extracted from the wood chips. This is because tar content contained in the wood chips is obtained in the course of combustion. In this manner, tar is obtained from the combustion device 13 that burns wood chips manufactured from unnecessary wood. This tar is used together with the wood chips in the impregnation section 2 of the fuel production apparatus 1.

  Thus, the unnecessary wood is used in the combustion device 13. As described above, the necessity of using the unnecessary wood by the combustion device 13 is to utilize the combustion heat in an area where the unnecessary wood is generated or in an area where the unnecessary wood is easily supplied. The combustion device 13 burns unnecessary wood (actually, wood chips obtained by chipping the wood) to have combustion heat. The tar extracted in this combustion process is supplied as tar used in the impregnation section 2.

  As described above, tar, which is one of the raw materials of the fuel manufactured by the fuel manufacturing apparatus 1, is also derived from unnecessary wood. Of course, wood chips also come from the same unwanted wood. Thus, the fuel A can be produced using unnecessary wood as a raw material together with the digested sludge which is difficult to treat. Also in this regard, the fuel manufacturing apparatus 1 can manufacture the fuel A from a raw material that is unnecessary and is difficult to treat.

  Naturally, the fuel A to be produced is used in a combustion device that needs to generate heat of combustion. By using the fuel A, which is produced from a material that is unnecessary and is difficult to treat, as a raw material for a combustion device that generates combustion heat, appropriate combustion can be realized from the viewpoint of environmental protection and the like.

(Dry)
FIG. 3 is a block diagram of the fuel production apparatus according to Embodiment 1 of the present invention. In FIG. 3, a wood chip drying unit 6 is provided. The wood chip drying unit 6 dries the wood chips supplied to the impregnation unit 2 in advance. The drying device 12 shown in FIG. 2 may correspond to the wood chip drying unit 6.

  The wood chip drying unit 6 dries wood chips obtained by grinding unnecessary wood. Drying can be realized by reducing the water content in the wood chips by a treatment such as a drying state and a heating state. This is because the tar absorption efficiency in the impregnation section 2 is further increased if the drying section is dried.

  Needless to say, there is an advantage that the combustion capacity of the fuel A is increased because the moisture contained in the fuel A finally manufactured is low. Further, since the drying unit 8 is provided after the molding unit 5, the degree of drying of the fuel A to be manufactured becomes sufficient, and the combustion capacity of the fuel A is increased.

(Digested sludge)
Digested sludge originates from at least one of the livestock, sewage and sewage industries. In the livestock industry, a large amount of sludge containing livestock excrement and food is generated. This sludge naturally has odor and hygiene problems. For this reason, sludge generated from the livestock industry is converted into digested sludge with reduced combustion components by anaerobic fermentation.

  For this reason, a large amount of digested sludge is generated in the livestock industry.

  Similarly, in the sewage treatment and sewage treatment industries, a large amount of sludge containing excrement, waste, organic compounds, and the like is generated. Such sludge also has odor and hygiene problems. If the landfill process is performed as it is, it may be an environmental problem. For this reason, sludge generated in such a sewage treatment industry or a sewage treatment industry is also subjected to anaerobic fermentation to convert the sludge into digested sludge with reduced combustion components.

  As a result, a large amount of digested sludge is generated also in the sewage treatment industry and the sewage treatment industry.

  Digested sludge generated in large amounts in the livestock industry, the sewage treatment industry, the sewage treatment industry, and the like should be originally used as a soil conditioner or the like as described in the related art. However, such use and management have not been performed, and landfill and incineration have been carried out.

  The fuel production apparatus 1 of the present invention produces fuel A using this digested sludge as one of the main raw materials. The combustion component is tar obtained from unnecessary wood. In this way, effective utilization of digested sludge which is troubled in disposal and generated in large quantities can be realized. In particular, fuel A can be manufactured by effective use. Since the fuel A can be used for a combustion device required to generate combustion heat, it can be effectively used in various situations.

(Drying of digested sludge)
FIG. 4 is a block diagram of the fuel production apparatus according to Embodiment 1 of the present invention. In the head 4, a digestion sludge drying section 7 is further provided.

  The digested sludge is used as one of the main raw materials of the fuel production device 1. The digested sludge is mixed with the tar impregnated chips. By mixing the tar impregnated chips, the combustion components are mixed. This mixture is finally formed into fuel A. From the viewpoint of improving the combustion capacity as the fuel A, the ease of molding, and the ease of transportation and storage of the molded fuel A, it is appropriate that the fuel has a dryness.

  For this reason, it is also preferable that the digested sludge supplied to the mixing section 3 has been dried in advance. The digested sludge drying section 7 dries the digested sludge in advance. For example, drying is performed in a space where humidity is attenuated. Alternatively, drying is performed in combination with global heating.

  The digested sludge dried by the digested sludge drying section 7 is supplied to the mixing section 3. As a result, the drying degree of the main raw material of the fuel A increases, so that the combustion ability of the fuel A increases. Of course, the ease of mixing in the mixing section 3 and the molding in the molding section 5 are also enhanced, and the production of the fuel A by the fuel production apparatus 1 is facilitated.

(Impregnated part)
The impregnation unit 2 causes the wood chips to absorb the tar, thereby generating tar-impregnated chips. The wood chips and tar are supplied, and the wood chips are impregnated by absorbing the tar.

  FIG. 5 is an internal configuration diagram of the impregnation section according to Embodiment 1 of the present invention. The impregnating section 2 further includes an air pressure reducing section 21. Wood chips 11 and tar 12 are supplied to the impregnation section 2. FIG. 5 schematically illustrates this. The state where the wood chip 11 is immersed in the tar 12 is shown, and the tar is absorbed by the wood chip through this immersion.

  The air pressure reducing section 21 reduces the air pressure in the internal space 22 of the impregnating section 2. When the air pressure in the internal space 22 is reduced, the wood chips 11 impregnated in the tar 12 easily absorb the tar 11. This is because the osmotic pressure of the wood chip 11 increases under the reduced pressure environment. Due to this increase, the wood chips 11 can sufficiently absorb the tar 12.

  By the function of the air decompression unit 21, the impregnation of the wood chips 11 with the tar 12 is promoted, and the production efficiency and production accuracy of the tar-impregnated chips are increased. The tar impregnated chips are mixed with the digested sludge having reduced combustion components to provide combustion components. For this reason, the high tar impregnation amount (tar impregnation rate) of the tar impregnated tip enhances the combustion performance of the obtained fuel A.

(Use of Fuel A)
The fuel A has a form such as a pellet that is easy to store, transport, and use. Therefore, the fuel A can be effectively used in various combustion devices that need to generate combustion heat. For example, it can be used for a power generation device using combustion heat. Alternatively, it can be used as fuel for a combustion device in a landfill. Alternatively, it can be used as fuel for a combustion device that generates heating heat for an agricultural house in agriculture. Alternatively, it is used as fuel for a heating device.

  There are many combustion devices that require combustion heat in various places. In particular, it is installed locally, or installed or moved to a necessary place for use. For such a combustion device, it is necessary that the fuel be supplied flexibly. Under such circumstances, the convenience of the fuel A in the form of pellets is high.

(Manufacture of wood chips)
FIG. 6 is a schematic diagram illustrating an example of manufacturing a wood chip according to Embodiment 1 of the present invention. The steps described in the block diagrams of FIGS. 1 and 4 are shown as actual examples.

  A fallen tree or driftwood is transported by the transport vehicle 30. The transport vehicle 30 transports a large amount of fallen trees and driftwood from an area where a natural disaster has occurred. The transport vehicle 30 carries these fallen trees and driftwood to the factory 31. In the factory 31, these fallen trees and driftwood are temporarily stored or necessary pretreatment is performed.

  Next, fallen trees and driftwood are finely pulverized by the pulverizer 32 into chips.

  Further, the chipped wood is dried in the dryer 33. Unnecessary moisture is removed by drying, and wood chips are manufactured as a direct fuel or as a main raw material used in the fuel manufacturing apparatus 1.

  A wood chip is manufactured by realizing such a manufacturing process in the vicinity of a place where unnecessary wood is generated.

  As described above, the fuel manufacturing apparatus 1 according to the first embodiment can manufacture the fuel A using unnecessary wood and digested sludge, which are in trouble with the treatment, as main raw materials. Effective use of these unnecessary materials can be realized. In particular, the location where the unnecessary wood is generated and the location where the digested sludge is generated are often local. Even in these regions, it is easy to install the fuel production apparatus 1 and the utilization is high.

  In addition, the location where unnecessary wood is generated and the location where digested sludge is generated are often close or similar areas. For this reason, there is also a merit that these generated places are linked through the fuel manufacturing apparatus 1 so that the unnecessary wood and the digested sludge which are in trouble for the treatment can be effectively utilized together.

  In addition, since the fuel manufacturing apparatus 1 can be easily relocated, it can be effectively utilized while being relocated to a place where it is difficult to treat unnecessary wood and digested sludge.

  (Embodiment 2)

  In the second embodiment, a fuel manufacturing method using the fuel manufacturing apparatus 1 will be described.

  FIG. 7 is a flowchart of a fuel production method according to Embodiment 2 of the present invention. The flowchart of FIG. 7 shows a process of manufacturing the fuel A using the fuel manufacturing apparatus 1 described in the first embodiment.

  In the impregnation step ST1, tar is absorbed by the wood chips to generate tar-impregnated chips. It is also preferable to improve the impregnation capacity by reducing the air pressure. The tar impregnated chips are transferred to the next step. It is also preferable that the wood chips have been dried in advance in the drying step ST5. Tar is obtained from the process of burning unwanted wood.

  Next, in the mixing step ST2, the tar-impregnated chips and the digested sludge are mixed to generate mixed sludge. The mixed sludge is transferred to the next step. In the drying step ST6, the digested sludge is preferably dried in advance.

  Next, in the crushing step ST3, the chip-mixed sludge is crushed. By pulverizing, molding in the next molding step becomes possible. In the crushing step, crushed chip mixed sludge is generated.

  Finally, in the molding step ST4, the mixed sludge with the crushed chips is molded into a predetermined shape. The predetermined shape may be a square, a pellet, or any other shape as long as the shape is easy to use for the combustion device and easy to store and transport. Subsequent to the molding step ST4, drying is performed in a drying step ST7. Through the drying step ST7, the fuel A is manufactured. Fuel A is one that effectively utilizes digested sludge and unnecessary wood that are in trouble for treatment.

  Tar is derived from unneeded wood and is an effluent generated when burning unneeded wood. This waste can be used effectively.

  Wood chips are obtained from unnecessary wood as described in the first embodiment. Unnecessary wood is at least one of thinned wood, waste wood, driftwood, and fallen wood. In addition, digested sludge is also in trouble for treatment, and digested sludge is generated from at least one of the livestock industry, the sewage treatment industry, and the sewage treatment industry.

  The fuel production method according to the second embodiment can produce fuel A that can be used in a combustion device by efficiently combining unnecessary wood that is in trouble with treatment and digested sludge. Unnecessary materials can be effectively used, and fuels required in various situations can be produced in a recycling process.

  As described above, the fuel production apparatus using digested sludge described in Embodiments 1 and 2 is an example for explaining the gist of the present invention, and includes modifications and alterations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Fuel manufacturing apparatus 2 Impregnation part 3 Mixing part 4 Pulverization part 5 Molding part 6 Wood chip drying part 7 Digestion sludge drying part 21 Air decompression part

Claims (11)

An impregnating unit that absorbs tar into wood chips to generate tar impregnated chips,
A mixing section for mixing the tar impregnated chips and digested sludge to generate chip mixed sludge; a pulverizing section for pulverizing the chip mixed sludge to generate pulverized chip mixed sludge; And a molding unit for producing a fuel derived from digested sludge by molding into a wood chip, wherein the wood chips are obtained from unnecessary wood.   The fuel production apparatus using digested sludge according to claim 1, wherein the unnecessary wood includes at least one of a thinned wood, a waste wood, a driftwood, and a fallen tree.   The fuel production apparatus utilizing digested sludge according to claim 1 or 2, wherein the tar is obtained from a combustion device that obtains combustion heat by burning the unnecessary wood.   The digestion sludge according to claim 3, wherein the combustion device burns the unnecessary wood to generate combustion heat, and supplies tar extracted from the unnecessary wood as the tar used in the impregnation unit. Fuel production equipment.   The fuel production apparatus using digested sludge according to any one of claims 1 to 4, further comprising a wood chip drying unit for drying the wood chips before the impregnation unit. The impregnating unit includes an air pressure reducing unit,
The fuel producing apparatus using digested sludge according to any one of claims 1 to 5, wherein the impregnating unit causes the wood chips to absorb the tar by reducing the air pressure by the air pressure reducing unit.   The fuel production apparatus using digested sludge according to any one of claims 1 to 6, wherein the digested sludge introduced into the mixing section has been dried in advance.   The fuel manufacturing apparatus using digested sludge according to claim 1, wherein the digested sludge is generated from at least one of a livestock industry, a sewage treatment industry, and a sewage treatment industry.   The fuel production device according to any one of claims 1 to 8, wherein the mixing unit further mixes the charcoal. An impregnation step of absorbing tar into the wood chips to produce tar impregnated chips,
A mixing step of mixing the tar-impregnated chips and digested sludge to produce chip mixed sludge,
A crushing step of crushing the chip mixed sludge to generate crushed chip mixed sludge,
A molding step of molding the crushed chip mixed sludge into a predetermined shape to generate a fuel derived from digested sludge,
A method for producing fuel using digested sludge, wherein the wood chips are obtained from unnecessary wood. The unnecessary wood includes thinned wood, waste wood, driftwood, at least one of fallen trees,
The fuel production method using digested sludge according to claim 10, wherein the digested sludge is generated from at least one of a livestock industry, a sewage treatment industry, and a sewage treatment industry.