Method for producing granulated waste material for combustion

Abstract

To provide a method for manufacturing a granulated material of a waste material for combustion, which achieves incineration while using a general incineration facility and is excellent in usability.SOLUTION: The method for producing the granulated waste material for combustion includes a step of kneading a waste rubber material, a plant-derived organic waste and a plant-derived polysaccharide to produce a kneaded product, and a step of solidifying the kneaded product to granulate the granulated waste material. Incineration is realized while utilizing a general incineration facility from the adjustment of the heating value or the like, and the combustion waste material granulated substance having good usability can be manufactured.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for producing granulated waste material for combustion to convert waste material into fuel granules, and more particularly to a method for producing granulated waste material for combustion containing organic waste of plant origin. [Background technology]

[0002] In recent years, the processing capacity of final disposal facilities that handle waste disposal has been reaching its limits, and since the establishment of new final disposal facilities would have a significant impact on the surrounding environment and would be difficult, there has been a growing trend to effectively reuse waste materials such as collected artificial turf paving and old tires as resources. Methods for utilizing such waste materials that use rubber as a raw material include reusing them to make new products, and incinerating them as fuel to extract thermal energy (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2021-532235 Summary of the Invention [Problem to be solved by the invention]

[0004] However, waste rubber generally generates heat at high temperatures, so if it is treated at a general waste incineration facility, additional cooling equipment is required, and if cooling is not possible, the incinerator itself may break down.It would be possible to build a thermal treatment facility specifically for recovering heat from waste rubber, but this would also result in the problem of additional equipment costs being required.

[0005] In view of the above-mentioned technical problems, the present invention provides a method for producing granulated waste material for combustion that allows incineration using a general incineration facility and is easy to use. [Means for solving the problem]

[0006] In order to solve the above-mentioned technical problems, the manufacturing method of the waste material granules for combustion of the present invention is characterized by having a step of kneading waste rubber, plant-derived organic waste, and plant-derived polysaccharides to produce a kneaded product, and a step of solidifying the kneaded product to granulate the waste material granules. In addition, in the manufacturing method of the waste material granules for combustion, in the step of producing the kneaded product, it is also possible to add water to the kneaded product to adjust the moisture content.

[0007] In the present invention, the fuel produced is in the form of solidified pellets or briquettes, and can be used as an alternative fuel for various boilers, such as for power generation, or for greenhouses. The waste rubber used in the present invention can be waste artificial turf cushioning, waste tires, or granular mixtures thereof. For example, waste rubber finely pulverized using a waste rubber product grinder can be used. Furthermore, the plant-derived organic waste to be mixed with the pulverized waste rubber can be one or more waste materials selected from rice husks, wheat husks, buckwheat husks, sawdust, rice straw, wheat straw, bagasse, bark, vegetable waste, corn husks, chestnut astringent skin and shell, peanut shell, and soybean or adzuki bean pods. In the present invention, waste paper, paper powder, etc. can also be used as plant-derived organic waste. These plant-derived organic waste materials are relatively easy to obtain near agricultural land and are inexpensive materials. The plant-derived polysaccharides to be mixed with the crushed waste rubber are, for example, one or more polysaccharides selected from potato starch, starch, rice flour, soybean flour, okara flour, soy milk powder, kudzu starch, wheat flour, and cornstarch, and may be in the form of powder or granules, or, if moisture is to be retained in the plant-derived polysaccharide in advance, may be in the form of a viscous fluid such as a paste. This plant-derived polysaccharide is a material that can function as a binder for the granulated waste material to be burned, and is used as a thickener to increase the bonding strength between the plant-derived organic waste and the waste rubber, and is selected from materials that do not generate harmful gases.

[0008] Through extensive research and experiments conducted by the present inventors, it has been found that the waste rubber, plant-derived organic waste, and plant-derived polysaccharides to be mixed as described above can be mixed in the following proportions: The waste rubber can be mixed to account for 40% to 80% of the total weight of the mixed product, and more preferably, 50% to 70% of the total weight of the mixed product; the plant-derived organic waste can be mixed to account for 10% to 30% of the total weight of the mixed product, and more preferably, 15% to 25% of the total weight of the mixed product; and the plant-derived polysaccharides can be mixed to account for 6% to 25% of the total weight of the mixed product, and more preferably, 10% to 20% of the total weight of the mixed product.

[0009] In another embodiment of the present invention, the method for producing waste material granules for combustion can use crushed waste plastic material instead of or in combination with the waste rubber material in the above-mentioned production method, and the crushed waste plastic material, etc. can be kneaded with plant-derived organic waste and plant-derived polysaccharides to produce a kneaded product, and the kneaded product can be solidified to produce waste material granules. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a process diagram illustrating an example of a method for producing granulated waste material for combustion according to the present invention. [Figure 2] 1 is a schematic diagram showing an example of a kneading granulation apparatus used in an example of the method for producing granulated combustion waste material of the present invention. FIG. [Figure 3] FIG. 2 is a schematic diagram showing an example of a manufacturing apparatus used in another example of the method for manufacturing granulated waste material for combustion of the present invention. [Figure 4] 1 is a photograph, in lieu of a drawing, of an example of raw material used in an experiment in the method for producing granulated waste material for combustion of the present invention, showing an example of raw material rubber chips. [Figure 5]1 is a photograph, substituted for a drawing, of an example of a raw material used in an experiment in the method for producing granulated waste material for combustion of the present invention, showing an example of the raw material, rice husk. [Figure 6] 1 is a photograph used as a substitute for a drawing showing an example of mixing of raw materials used in an experiment in the method for producing granulated waste material for combustion of the present invention. [Figure 7] This is a photograph used as a drawing to show an example of solidification used in an experiment in the manufacturing method of the present invention for granulated waste material for combustion, showing the solidification state of Example 7. [Figure 8] This is a photograph used as a drawing to show an example of solidification used in an experiment in the manufacturing method of the present invention for granulated waste material for combustion, showing the solidification state of Example 9. [Figure 9] This is a photograph used as a drawing to show an example of solidification used in an experiment in the manufacturing method of the present invention for granulated waste material for combustion, showing the solidification state of Example 10. [Figure 10] This is a photograph used as a drawing to show an example of solidification used in an experiment in the manufacturing method of the present invention for granulated waste material for combustion, showing the solidification state of Example 13. [Figure 11] This is a photograph, used as a drawing substitute, of an example of solidification used in an experiment in the manufacturing method of the present invention for granulated waste material for combustion, showing the solidification state of Example 14. [Figure 12] This is a photograph, used as a drawing, of an example of solidification used in an experiment in the manufacturing method of the present invention for granulated waste material for combustion, showing the use of a 5 mm sieve. DETAILED DESCRIPTION OF THE INVENTION

[0011] The method for producing granulated waste material for combustion of the present invention will be described with reference to the drawings. In the method for producing granulated waste material for combustion of the present invention, waste rubber, plant-derived organic waste, and plant-derived polysaccharides are kneaded to produce a kneaded product, which is then solidified to produce granulated waste material for fuel. If waste rubber alone were produced to a size suitable for combustion, the calorific value would be higher than that of fuels such as coal, necessitating additional adjustments to the combustion engine or equipment. Therefore, the present invention aims to produce granulated waste material for fuel with a calorific value similar to that of fuels such as coal, which are easy to use. The present specification does not limit the size of the granulated waste material for fuel, and various sizes such as pellets and briquettes can be used depending on the intended use. For example, granulated waste material for fuel used in large combustion equipment may be brick-sized (briquettes), while for use in slightly smaller combustion equipment, particle sizes of several millimeters to several centimeters may be used.

[0012] Waste rubber, one of the main materials used in the production of the waste granulated material for combustion in this invention, is a rubber-based resin material such as waste artificial turf cushioning, waste tires, or industrial waste rubber (rubber discarded from factories, etc.). As shown in Figure 1, in the pretreatment process S10 of the waste rubber, for example, tires or artificial turf cushioning, are finely shredded using a required shredder, and if necessary, foreign matter such as metal pieces and metal wires is removed. The finely shredded waste rubber is generally referred to as rubber chips, and in this specification, may contain synthetic resin materials other than rubber. The size of the rubber chips is approximately 2 to several millimeters in particle size, but is not particularly limited to this size. A mixture of two or more types of waste rubber can also be used as the raw material for the waste rubber. This waste rubber is prepared as waste rubber chips (S12).

[0013] In addition, the raw materials prepared along with the waste rubber chips include plant-derived organic waste (hereinafter referred to as plant waste), plant-derived polysaccharides S16, and water (S14, S16, S18), which are mixed in the kneading step S20. The plant waste can be one or more types of waste selected from rice husks, wheat husks, buckwheat husks, sawdust, rice straw, wheat straw, bagasse, bark, vegetable waste, corn husks, chestnut astringent and husk shells, peanut shells, and soybean or adzuki bean pods. It primarily consists of agricultural waste such as discarded grain, but it can also include industrial waste such as waste paper and paper dust. Plant waste can be selected based on whether it is sufficiently dried, but it can also be used as a raw material even if it is not sufficiently dried. For mass production, a predetermined drying process can be performed. Drying methods such as natural drying, kiln-type dryers, high-frequency heating dryers, fluidized bed dryers, flash dryers, and bag feeders can be used.

[0014] In the present invention, the viscosity of the kneaded product can be adjusted by adjusting the water content, but materials such as waste gypsum may also be added to adjust the hardness of the solidification. It is also possible to adjust the viscosity of the kneaded product by using a grease trap that recovers grease from an oil and fat separation interceptor instead of or in combination with water. Plant-derived organic waste and polysaccharides already contained in the grease trap can be used as is, and the amount of plant-derived organic waste and polysaccharides to be newly mixed can be reduced.

[0015] The plant-derived polysaccharides to be added to the plant organic matter may be one or more polysaccharides selected from, for example, potato starch, starch, rice flour (including shiratamako, joshinko, and mochiko), soybean flour, okara flour, soy milk powder, kudzu starch, wheat flour, cornstarch, and sake lees.In addition to being in the form of powder or granules, if the plant-derived polysaccharide is made to retain moisture in advance, the polysaccharide may also be in the form of a viscous liquid such as a paste.

[0016] In the kneading step S20, water is added to the waste rubber chips, plant waste, and plant-derived polysaccharides, and the mixture is kneaded for the required time. The method of adding water is not particularly limited, but it is also possible to pre-add water to the plant organic matter or plant-derived polysaccharides used, such as by spraying the raw materials before kneading or pre-wetting rice husks. As described below, the amount of water affects combustion performance, but too little water also affects granulation performance. Therefore, there is a range of water content that achieves both good combustion and good granulation performance. Since the size of the die used for granulation also affects the water content, a suitable range will be clarified in the examples below, which test the granulation performance of combustion waste granules. In this embodiment, since combustion waste granules are produced, excessive uniformity of the material after kneading is not necessary as long as it does not affect the combustion performance of the combustion waste granules, and therefore a relatively short kneading time is sufficient. For example, when producing approximately 20 kg of combustion waste granules, a few minutes is sufficient.

[0017] The waste rubber, plant-derived organic waste, and plant-derived polysaccharides to be mixed can be mixed in the following proportions to prevent excessively high calorific value and to facilitate granulation depending on the moisture content. The waste rubber can be mixed in an amount of 40% to 80% by weight of the total mixed product, more preferably 50% to 70% by weight of the total mixed product. Because waste rubber has a high calorific value, if the mixing ratio is too high, it can become highly flammable, potentially interfering with use in existing combustion engines. Furthermore, the plant-derived organic waste is added to complement the waste rubber and generates a relatively low calorific value upon combustion. Therefore, the combination of the waste rubber and plant-derived organic waste can be adjusted to achieve an efficient calorific value. The plant-derived organic waste can be mixed in an amount of 10% to 30% by weight of the total mixed product, more preferably 15% to 25% by weight of the total mixed product. The plant-derived polysaccharides can be blended in an amount of 6% to 25% by weight of the total weight of the kneaded product, and more preferably 10% to 20% by weight of the total weight of the kneaded product. The plant-derived polysaccharides are blended particularly to improve granulation properties, and as will be apparent from the examples described below, adjustment of the water content is important.

[0018] For the kneading process, a dedicated kneading machine can be used, or a kneading granulation device that performs granulation after kneading can also be used. Figure 2 is a schematic diagram of an example of a kneading granulation device that can be used in the method for producing granulated combustion waste material of this embodiment. For example, the HZ-ZLSP200R manufactured by HAIGER is an example of this type of flat die type kneading granulation device. The kneading granulation device 10 shown in Figure 2 has a 200V three-phase electric motor 14 on the bottom side, and the motor shaft is connected to a gearbox 22, which is configured to transmit driving force to a gear (not shown) within the gearbox 22. A cylindrical granulation section is provided above the gearbox 22, and within the granulation section are a pair of rollers 18, 18 with grooves around their periphery and a die 24 disposed at the bottom. The rotational force transmitted to the gearbox 22 is transmitted to a pair of rollers 18, 18 within the cylindrical granulation section as a rotational force around the roller axis and also to the vertical central axis of the pair of rollers 18, 18, causing the pair of rollers 18, 18 to rotate around the central axis of the granulation section while rotating. The die 24 has multiple through holes of the same diameter, and as the material to be granulated passes through the die 24, it is granulated to the size of the through holes. A discharge port 20 extending diagonally downward is provided at the bottom of the die 24 to discharge the granulated waste material. A metal hopper 16 with a large upward opening is provided at the top of the cylindrical granulation section. Raw materials are fed into this hopper 16, and kneading and granulation are carried out in the kneading and granulation apparatus 10. A control panel 12 is provided above the motor 14, allowing for operations such as starting and stopping the motor.

[0019] When the kneading and granulation apparatus 10 is operated to produce granulated combustion waste material, waste rubber, plant-derived organic waste, and plant-derived polysaccharides are placed in the hopper 16 as raw materials to be fed into the apparatus. These raw materials are mixed by rubbing against the circumferential surfaces of a pair of rollers 18, 18 to form a kneaded product, which is then guided to the bottom of the pair of rollers 18, 18 and sandwiched between the die 24 and the rollers 18, 18. When further downward pressure is applied by the pair of rollers 18, 18, the kneaded product passes through the through holes of the die 24, granulating the kneaded product to a size reflecting the diameter of the through holes, and is then discharged from the discharge port 20. The diameter of the through holes of the die 24 can be selected depending on the size of the granulated combustion waste material to be granulated, for example, 6 mm or 10 mm.

[0020] Although a flat die-type kneading granulator as shown in Figure 2 can be used, a piston-type granulator 30 as shown in Figure 3 can also be used in the manufacturing method of granulated combustion waste. The granulator 30 has a hollow, cylindrical compression section 32, and a reciprocating piston 34 is arranged at the base end of the compression section 32. A connecting rod 36 is attached to the other end of the piston 34, which can convert the rotational motion of a motor (not shown) into reciprocating motion. A feed section 40 containing a screw 38 is connected to the hollow of the compression section 32, and raw materials are supplied to a hopper (not shown). The raw materials are mixed in the feed section 40 as the screw 38 rotates, and are sent to the tip 42 of the compression section 32 as the piston 34 of the compression section 32 moves, producing granulated combustion waste.

[0021] Assuming that a required kneading and granulating device is used, the product, granulated waste material for combustion, is obtained through the granulation step S22 in Fig. 1 (S24). In this embodiment, experiments have been conducted to find a combination of kneaded waste rubber, plant-derived organic waste, and plant-derived polysaccharides that will provide the desired calorific value and also have excellent granulation properties, and the experiments and results will be described below.

[0022] The demonstration experiment for the manufacturing method of combustible waste granules used artificial turf cushioning material (natural rubber, approximately 1 mm particle size) as raw material, untreated rice husks (approximately 10% moisture) as plant-derived organic waste, and potato starch as plant-derived polysaccharides. A flat-die kneading and granulating device (HAIGER HZ-ZLSP200R) was used, with both 6 mm and 10 mm die hole sizes tested. The kneading and granulating device was operated at 7.5 kW power and with a 200 mm die diameter. The raw materials were mixed by weighing each material, placing them in an approximately 80 L vat, mixing them, adding water, and stirring again before being fed into the kneading and granulating device. The granulation rate was approximately 3 min / kg. Photographs of the artificial turf cushioning material and rice husks are shown in Figure 4 and Figure 5, respectively. FIG. 6 is a photograph of a mixture of rubber chips made of artificial turf cushioning material, untreated rice husks, potato starch, and water in a mixing ratio of 500:300:200:200 (Example 13).

[0023] In this demonstration experiment, examples in which the blending ratio of raw materials did not include potato starch, a plant-derived polysaccharide, were designated Comparative Examples 1 to 6, respectively. In contrast, examples in which potato starch, a plant-derived polysaccharide, was included were designated Examples 7 to 14, respectively. The details of the blending ratio of each Comparative Example and Example are shown in Table 1.

[0024] [Table 1]

[0025] Table 1 also shows the moldability assessment, which is evaluated using three levels: poor, acceptable, and good. More specifically, Comparative Examples 1 to 3 contain zero rubber chips and zero potato starch. Comparative Example 1 was unacceptable; the die clogged, and the raw material could not be extruded due to the high moisture content. Comparative Example 2 also experienced die clogging, with the raw material solidifying and clogging the die holes due to the low moisture content. Comparative Example 3 was pelletized, but resulted in hard pellets. Comparative Examples 4 and 5 were extruded from the die but did not solidify. Comparative Example 6 was fully molded, but remained powder until the end and did not solidify. In Comparative Example 1, a kneaded product containing 0 g of rubber chips, 500 g of rice husks, 0 g of potato starch, and 125 g of water was used, and the diameter of the die holes during granulation was 6 mm. In Comparative Example 2, a kneaded product containing 0g of rubber chips, 1000g of rice husks, 0g of potato starch, and 100g of water was used, and the diameter of the die holes during granulation was 6mm. In Comparative Example 3, a kneaded product containing 0g of rubber chips, 1000g of rice husks, 0g of potato starch, and 100g of water was used, and the diameter of the die holes during granulation was 10mm. In Comparative Example 4, a kneaded product containing 500g of rubber chips, 500g of rice husks, 0g of potato starch, and 100g of water was used, and the diameter of the die holes during granulation was 6mm. In Comparative Example 5, a kneaded product containing 500g of rubber chips, 500g of rice husks, 0g of potato starch, and 200g of water was used, and the diameter of the die holes during granulation was 6mm. In Comparative Example 6, a kneaded product containing 300 g of rubber chips, 700 g of rice husks, 0 g of potato starch, and 200 g of water was used, and the diameter of the die hole during granulation was 10 mm.

[0026] In contrast, it was found that Examples 7 to 14, in which potato starch was added, produced good results, with some exceptions. More specifically, in Example 7, a kneaded product of 300 g of rubber chips, 700 g of rice husks, 110 g of potato starch, and 220 g of water was used, and the die hole diameter during granulation was 6 mm, resulting in a product that solidified but was soft and easily crumbled (see Figure 7). In Example 8, a kneaded product of 250 g of rubber chips, 650 g of rice husks, 100 g of potato starch, and 220 g of water was used, and the die hole diameter during granulation was 10 mm, resulting in good pelletization and hardness. In Example 9, a mixture of 400 g of rubber chips, 400 g of rice husks, 200 g of potato starch, and 250 g of water was used. The die hole diameter during granulation was set to 6 mm. The results were favorable; the mixture became highly viscous and turned into a paste in the granulator (see Figure 8). The pellets formed were coarse and held together by the potato starch. In Example 10, a mixture of 450 g of rubber chips, 450 g of rice husks, 100 g of potato starch, and 200 g of water was used. The die hole diameter during granulation was set to 6 mm. Hard, dense pellets were obtained, but the die temperature rose during prolonged granulation, and excessive temperature rises tended to cause clogging (see Figure 9). In Example 11, a mixture of 450 g of rubber chips, 450 g of rice husks, 100 g of potato starch, and 250 g of water was used, and the die hole diameter during granulation was set to 6 mm. As a result, clogging was unlikely to occur, but the pellets tended to be soft and easily crumbled. In Example 12, a mixture of 475 g of rubber chips, 475 g of rice husks, 50 g of potato starch, and 200 g of water was used, and the die hole diameter during granulation was set to 6 mm. As a result, the pellets came out of the die but did not solidify. In Example 13, a mixture of 500 g of rubber chips, 300 g of rice husks, 200 g of potato starch, and 200 g of water was used, and the die hole diameter during granulation was set to 10 mm. As a result, there was no clogging in the die, and good pellets were obtained, although they were slightly flaky (see Figure 10).In Example 14, a kneaded product of 600 g of rubber chips, 200 g of rice husks, 200 g of potato starch, and 150 g of water was used, and the diameter of the die holes during granulation was set to 10 mm. As a result, there was no clogging in the die, and good pellets were obtained, although they were somewhat brittle, easily crumbled, and ragged (see Figure 11).

[0027] These comparative examples and examples revealed that, first, adding potato starch is necessary when mixing rubber chips, and that when the potato starch content is low (e.g., 5% or less), it is difficult to harden the mixture into pellets. Comparing Examples 10 and 11, the moisture content is 200g for Example 10 and 250g for Example 11. Example 11 has a moisture content about 5% higher, which makes it soft and prone to crumbling. Therefore, it is important to maintain the moisture content within a moderate range. Furthermore, pelletization is more efficient when the die hole diameter is 10mm rather than 6mm. Rice husk to rubber chip ratios of 0.33 to 2.6 were tested, but when the potato starch content was low, the mixture became brittle and prone to crumbling upon solidification.

[0028] Next, we measured the percentage of pellets that ultimately formed the final product. The solidified pellets were sieved through a 5mm mesh sieve. As shown in Figure 12, some of the finely broken fragments fell through the sieve, and the percentage of the product remaining on the sieve was measured. It was 87% for Example 13 and 81% for Example 14, indicating that good yields were achieved in Examples 13 and 14. In particular, we found that repeating the granulation process two or three times improved the solidification yield. This is presumably because the die temperature rose due to frictional heat from continuous molding, increasing the fluidity and adhesive strength of the potato starch and rice husks.

[0029] According to calculations, the calorific value of the combustion waste pellets pelletized in the examples was a maximum of 25 MJ / kg, which is similar to the calorific value of imported steam coal (26 MJ / kg), and it was possible to reduce the calorific value of rubber chips alone by 37 MJ / kg. For example, the calorific value of Example 13 was calculated to be 25 MJ / kg, and the calorific value of Example 14 was calculated to be 25 MJ / kg. The calorific value of rice husks is 14 MJ / kg, and that of starch is 18 MJ / kg. Furthermore, the moisture content of the combustion waste pellets after pelletization is thought to decrease due to temperature increases and evaporation, and it is estimated that the calorific value of the combustion waste pellets in actual products will be higher than the measured value.

[0030] As another example, crushed waste plastic materials can be used as the kneaded product, and for example, crushed materials such as cushioning materials used in artificial turf can be used. The waste plastic materials can be any type of thermoplastic resin or thermosetting resin, as long as they have been granulated through the required crushing process. Waste plastic materials based on a single type can be used, or multiple types of waste plastic materials can be used. Furthermore, since rubber materials are also synthetic resins, the waste plastic materials can also include waste rubber materials.

[0031] As described above, in the manufacturing method of the granulated waste material for combustion of the present invention, it is possible to realize incineration using a general incineration facility by adjusting the calorific value, etc., and it is possible to manufacture granulated waste material for combustion that is easy to use, and by mixing organic waste of plant origin with polysaccharides of plant origin, it is possible to realize a combustion cycle with a small burden on the environment. In addition, since the raw materials to be kneaded do not use harmful synthetic agents such as organic solvents, each operation of the kneading process and the granulation process is extremely safe, and it can be widely spread. [Explanation of symbols]

[0032] 10 Kneading and granulation equipment 12 Control Panel 14 Electric motor 16 Popper 18 Roller 20 Outlet 22 Gearbox 24 dice 30 Granulation equipment 32 Compression section 34 Piston 36 Connecting rod 38 Screw 40 Feeding section 42 Tip

Claims

1. a step of kneading waste rubber material, plant-derived organic waste, and plant-derived polysaccharides to produce a kneaded product; and a step of solidifying the kneaded product to form a waste material granule.

2. In the method for producing granulated combustion waste material described in claim 1, in the process of producing the kneaded product, moisture, grease trap, or a combination thereof is added to the kneaded product to adjust the viscosity of the kneaded product.

3. 2. The method for manufacturing granulated waste material for combustion according to claim 1, wherein the waste rubber material includes granules of at least one of waste artificial turf cushioning material and waste tires.

4. 2. The method for producing granulated waste material for combustion according to claim 1, wherein the organic waste of plant origin is one or more types of waste selected from the group consisting of rice husks, wheat husks, buckwheat husks, sawdust, rice straw, wheat straw, bagasse, bark, vegetable waste, corn husks, chestnut astringent skin and shell, peanut shells, and soybean or adzuki bean pods.

5. 2. The method for producing granulated combustion waste material according to claim 1, wherein the plant-derived polysaccharide is one or more polysaccharides selected from potato starch, starch, rice flour, soybean flour, okara flour, soy milk powder, kudzu starch, wheat flour, corn starch, and sake lees.

6. 2. The method for producing granulated waste material for combustion according to claim 1, wherein the waste rubber material is blended so that it accounts for 40% to 80% by weight of the total weight of the kneaded product.

7. 2. The method for producing granulated waste material for combustion according to claim 1, wherein the organic waste of plant origin is blended so that it accounts for 10% to 30% by weight of the total weight of the kneaded product.

8. 2. The method for producing granulated waste material for combustion according to claim 1, characterized in that the plant-derived polysaccharides are blended so that they account for 6% to 25% by weight of the total weight of the kneaded product.

9. 2. The method for producing granulated waste material for combustion according to claim 1, wherein the granulated waste material has a calorific value of 20 to 28 MJ / kg.

10. 2. The method for manufacturing granulated waste material for combustion according to claim 1, characterized in that when granulating the waste material, the hole diameter of the die of the granulator is set to 6 mm to 20 mm.

11. 2. The method for producing granulated waste material for combustion according to claim 1, wherein the granulated waste material is granulated by passing it through a granulator multiple times.

12. A step of kneading the crushed waste plastic material, plant-derived organic waste, and plant-derived polysaccharides to produce a kneaded product; and a step of solidifying the kneaded product to form a waste material granule.

13. 13. The method for producing granulated combustion waste material according to claim 12, characterized in that in the step of producing the kneaded product, moisture, grease trap, or a combination thereof is added to the kneaded product to adjust the viscosity of the kneaded product.

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