Organic waste recycling method and organic waste recycling system

Abstract

To provide an organic waste recycling method and a recycling system that can perform efficient thermal decomposition carbonization of organic wastes with high water content and having extremely excellent heat economy.SOLUTION: An organic waste recycling method includes: a squeeze dehydration step A for squeeze dehydration of organic wastes; a dry step B of drying the same; a thermal decomposition carbonization step C of low-temperature thermal decomposition of the dried organic wastes for formation of cracker gases, cracking oils, and carbides; a firing exhaust gas formation step D of firing the formed carbonization exhaust gases for formation of firing exhaust gases as well as heat exchanging these firing exhaust gases with carbonization exhaust gases for formation of firing exhaust gases after the heat exchange; a gas blending and deodorization step E of blending the firing exhaust gases formed in the firing exhaust gas formation step D and the dred exhaust gases formed in the dry step B, followed by deodorizing the same; a carbonization heat source supply step H of circulating the firing exhaust gases; and a dry heat source supply step J of circulating the blended deodorization gases.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an organic waste recycling method and organic waste recycling system for treating and recycling organic waste with a high moisture content, such as food residue, cut vegetation, and used paper diapers. [Background technology]

[0002] Conventionally, many recycling systems have been proposed that employ pyrolysis and carbonization equipment to pyrolyze and carbonize organic waste, enabling it to be recycled. For example, a recycling system has been proposed that reduces the weight of organic waste such as food waste, plastic waste, wood waste, and sludge, pyrolyzes it to produce carbonized material, and enables it to be recycled (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-146666 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] However, in the recycling system described in Patent Document 1, when processing organic waste with a high moisture content (moisture content of 60% or more), such as food waste, cut vegetation, and used paper diapers, it was difficult to directly put these into a pyrolysis and carbonization device and pyrolyze and carbonize them.

[0005] Therefore, when treating organic waste with a high moisture content (moisture content of 60% or more), it is necessary to supply thermal energy from an external source and carbonize the waste in a high-temperature, low-oxygen atmosphere, which consumes a large amount of thermal energy and poses thermal economic issues.

[0006] The present invention has been made in consideration of the above-mentioned conventional problems, and aims to provide an organic waste recycling method and recycling system that can efficiently carbonize organic waste with excellent thermal economy when treating organic waste with a high moisture content (moisture content of 60% or more) without supplying a large amount of heat energy from the outside, as has been done in the past. [Means for solving the problem]

[0007] In order to achieve the above object, the organic waste recycling method of the present invention comprises: a compression dehydration process in which organic waste with a moisture content of 60% or more is compressed and dehydrated to a moisture content of 50% or less; A drying process in which the compressed and dehydrated organic waste is further dried to a moisture content of 30% or less; a pyrolysis and carbonization process in which dried organic waste is pyrolyzed at low temperature to produce cracked oil, cracked gas, and char; a combustion exhaust gas generating step of combusting the generated decomposition gas to generate a combustion exhaust gas, exchanging heat between the combustion exhaust gas and the decomposition gas, and discharging the combustion exhaust gas after heat exchange; a gas mixing and deodorizing step of mixing the combustion exhaust gas generated in the combustion exhaust gas generating step and the dried exhaust gas generated in the drying step and deodorizing the mixture; a carbonization heat source supply step of circulating the combustion exhaust gas and using it as a heat source in the pyrolysis carbonization step; a drying heat source supplying step of circulating the mixed deodorized gas and using it as a heat source in the drying step; The present invention is characterized in that it comprises:

[0008] The organic waste recycling method of the present invention is further characterized by comprising a gas cooling step for cooling the mixed and deodorized mixed deodorized gas, and a mixed gas emission step for removing dust from the cooled mixed deodorized gas and emitting it into the atmosphere.

[0009] The organic waste recycling system of the present invention is a system for suitably carrying out the organic waste recycling method of the present invention, A compression dehydration device that compresses and dehydrates organic waste with a moisture content of 60% or more to a moisture content of 50% or less; A drying device that further dries the compressed and dehydrated organic waste to a moisture content of 30% or less. a pyrolysis and carbonization device for pyrolyzing dried organic waste at low temperatures to produce cracked oil, cracked gas, and char; a cracked gas combustion device that combusts the generated cracked gas to generate a combustion waste gas; and a heat exchanger that exchanges heat between the combustion waste gas and the cracked gas; a gas mixing and deodorizing device for mixing the combustion waste gas generated in the combustion waste gas generating step with the dried waste gas generated in the drying step and deodorizing the mixed gas; a carbonization heat source supply pipe for circulating the combustion waste gas and using it as a heat source in the pyrolysis carbonization apparatus; a drying heat source supply pipe for circulating the deodorized mixed gas and using the gas as a heat source in the drying device; The present invention is characterized in that it is composed of:

[0010] The organic waste recycling system of the present invention is further characterized by comprising a gas cooling device for cooling the mixed and deodorized gas, and a dust collecting device for removing dust from the cooled mixed and deodorized gas.

[0011] Here, the organic waste is characterized in that it is used paper diapers. [Effects of the Invention]

[0012] According to the organic waste recycling method of the present invention, the low calorific value inherent in organic waste with a high moisture content (moisture content of 60% or more) is effectively utilized as a heat source for treating and recycling the organic waste. Therefore, even when treating organic waste with a high moisture content (moisture content of 60% or more), the organic waste can be efficiently carbonized without having to supply a large amount of heat energy from an external source, as was the case in the past, resulting in extremely excellent thermal economy.

[0013] Furthermore, the organic waste recycling system of the present invention allows the organic waste recycling method of the present invention to be suitably carried out. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram of an organic waste recycling system according to the present invention. [Figure 2] FIG. 2 is a cross-sectional view of a compression dewatering device. [Figure 3] (A) is a front view of the drying device, and (B) is a side view. [Figure 4] FIG. 1 is a cross-sectional view of a low-temperature pyrolysis carbonization apparatus. [Figure 5] FIG. 1 is a partially cutaway perspective view of a carbonized exhaust gas combustion device equipped with a heat exchanger. [Figure 6] FIG. 2 is a cross-sectional view of a mixing deodorizing device. [Figure 7] FIG. 1 is a diagram illustrating the configuration of a fine atomization gas cooling device. DETAILED DESCRIPTION OF THE INVENTION

[0015] First, the organic waste recycling method of the present invention will be described in detail below with reference to the drawings.

[0016] As shown in Figure 1, the organic waste recycling method of the present invention comprises a compression dehydration process A, a drying process B, a pyrolysis carbonization process C, a combustion exhaust gas generation process D, a gas mixing deodorization process E, a mixed gas cooling process F, a mixed gas diffusion process G, a carbonization heat source supply process H, a drying heat source supply process J, and a carbonized product bag making process K.

[0017] As shown in FIG. 1, the compression dehydration process A is a process in which organic waste WA0 having a high moisture content, that is, a moisture content of 60% or more, particularly a moisture content of 60% to 80%, is compressed and dehydrated to a moisture content of 50% or less, particularly a moisture content of 40% to 50%.

[0018] As shown in FIG. 1, the drying process B is a process in which the organic waste WA1 after compression dehydration is dried to a moisture content of 30% or less, particularly a moisture content of 10% to 30% using a mixed deodorizing gas GE of about 300°C generated in the gas mixing deodorizing process E described below as a heat source. During the drying process, dry exhaust gas GB at about 200°C is generated.

[0019] As shown in Figure 1, the pyrolysis carbonization process C is a process in which the organic waste WA2 after drying is carbonized by low-temperature pyrolysis using the combustion exhaust gas GD of approximately 550°C generated in the combustion exhaust gas generation process D described below as a heat source. In the pyrolysis and carbonization step C, the organic waste WA2 after the drying treatment is subjected to low-temperature pyrolysis by the combustion exhaust gas GD to become a decomposition gas GS, a decomposition oil OL, and a char CA. The vaporized cracked oil OL and cracked gas GS are mixed together to form carbonized exhaust gas GC at about 400°C.

[0020] The carbonized material CA produced in the pyrolysis carbonization step C is in the form of an amorphous powder having nano-level pores, and is used as a highly functional carbon material.

[0021] As shown in Figure 1, the combustion exhaust gas generation process D is a process in which the carbonized exhaust gas GC generated in the pyrolysis carbonization process C at approximately 400°C is combusted with air to reach a temperature of 800°C or higher, and ultimately a combustion exhaust gas GD at approximately 550°C is generated, which is used as a heat source in the drying process B and the pyrolysis carbonization process C.

[0022] In the combustion exhaust gas generation process D, as shown in Fig. 1, a heat exchange is also carried out in which part of the heat is recovered from the combustion exhaust gas GD of 800°C or more and supplied to the carbonized exhaust gas GC of about 400°C. As a result, the combustion exhaust gas GD of about 550°C is finally generated.

[0023] As shown in Figure 1, the gas mixing deodorization process E is a process in which the dry exhaust gas GB at about 200°C is mixed with the combustion exhaust gas GD at about 550°C to decompose and deodorize the malodorous components contained in the dry exhaust gas GB and produce a mixed deodorized gas GE at about 300°C.

[0024] As shown in FIG. 1, the mixed gas cooling step F is a step of cooling the mixed deodorized gas GE, which is not used as a heat source in the drying step B and has a temperature of about 300°C, to about 200°C in order to dissipate it into the atmosphere.

[0025] As shown in FIG. 1, the mixed gas diffusion step G is a step of removing dust from the mixed deodorized gas GE cooled to about 200° C. and diffusing the gas into the atmosphere.

[0026] As shown in FIG. 1, the carbonization heat source supply step H is a step of circulating the combustion exhaust gas GD at about 550° C. and supplying it as a heat source in the pyrolysis and carbonization step C.

[0027] The drying heat source supplying step J is a step of circulating the mixed deodorizing gas GE at about 300° C. and supplying it as a heat source in the drying step B, as shown in FIG.

[0028] As shown in Figure 1, the carbonized material bag making process K is a process in which the powdered carbonized material CA produced by low-temperature pyrolysis in the pyrolysis carbonization process C is filled into a bag for shipping or storage as a product.

[0029] As described above, according to the organic waste recycling method of the present invention, organic waste WA0 with a high moisture content of 60% or more is efficiently carbonized through the compression dehydration process A, drying process B, and pyrolysis carbonization process C to become powdered carbonized material CA with amorphous nano (nm) level pores, which can be used as a highly functional carbon material. Therefore, organic waste WA can be effectively recycled, and the method is extremely economical.

[0030] Furthermore, according to the organic waste recycling method of the present invention, the process goes through the combustion exhaust gas generation step D, the gas mixing deodorization step E, the carbonization heat source supply step H, and the drying heat source supply step J, and the combustion exhaust gas GD is supplied as a heat source in the pyrolysis carbonization step C, and the mixed deodorization gas GE is supplied as a heat source in the drying step B. Therefore, the organic waste WA can be efficiently carbonized without supplying a large amount of heat energy from the outside, and the thermal economy is extremely excellent.

[0031] Next, a preferred embodiment of an organic waste recycling system for carrying out the organic waste recycling method of the present invention will be described in detail below with reference to the drawings.

[0032] As shown in FIG. 1, the organic waste recycling system of the present invention comprises a compression dehydration device 1 for compressing and dehydrating organic waste WA0 having a high moisture content of 60% or more, a drying device 2 for further drying the compressed and dehydrated organic waste WA1, a pyrolysis carbonization device 3 for low-temperature pyrolysis of the dried organic waste WA2 to generate a decomposition gas GS, a decomposition oil OL, and a carbide CA, a carbonization exhaust gas combustion device 4 for burning the generated carbonization exhaust gas GC to generate a combustion exhaust gas GD, and a combustion device 5 for burning the combustion exhaust gas GD. the combustion exhaust gas GD and the dry exhaust gas GB and deodorizes the mixed gas; a gas mixing deodorization device 5 that mixes the combustion exhaust gas GD and the dry exhaust gas GB and deodorizes the mixed gas; a gas cooler 6 that cools the mixed deodorized gas GE after deodorization; a carbonization heat source supply pipe D1 that circulates the combustion exhaust gas GD and supplies it as a heat source in the pyrolysis carbonization device 3; and a drying heat source supply pipe E1 that circulates the mixed deodorized gas GE and supplies it as a heat source in the drying device 2.

[0033] Hereinafter, the organic waste WA0 having a high moisture content of 60% or more, particularly 60% to 80%, will be described taking used disposable diapers NA0 as an example.

[0034] Disposable diapers NA are generally constructed by laminating a surface material made of polyolefin nonwoven fabric or the like, a water-absorbing material made of cotton-like pulp, a polymer absorbent material or the like, and a waterproof material made of polyolefin film or the like, and attaching a fastening material made of polyolefin tape or the like.

[0035] During use, the absorbent material absorbs moisture such as urine and sweat, and after use, the diaper becomes a used disposable diaper NA0 with a high moisture content of 60% or more.

[0036] First, used paper diapers NA0 with a high moisture content, having a moisture content of 60% or more, particularly 60% to 80%, are fed into the feeding hopper 10 of the compression dehydration device 1 and inserted into the straight bowl shaft 11, as shown in Figures 1 and 2. A screw 12 rotates within the straight bowl shaft 11, and the used disposable diaper NA0 is conveyed to the right by the screw 12 while being rotated and squeezed.

[0037] During this rotary squeezing process, the used paper diaper NA0 is squeezed and dehydrated, and the squeezed and dehydrated used paper diaper NA1 is discharged from the waste discharge outlet 13 on the right side, and the dehydrated and extracted separated liquid LX is discharged from the separated liquid discharge outlet 14 on the left side. Then, by this compression dehydration device 1, most of the moisture contained in the used disposable diaper NA0 is mechanically compressed and dehydrated to a moisture content of 50% or less, particularly to a moisture content of 40% or more and 50% or less.

[0038] In addition, the separated liquid EX dehydrated and extracted from the used paper diaper NA0 during the compression dehydration process is supplied to the mixing deodorization device 5 shown in Figure 6 via the piping A1 shown in Figure 1, and is used to cool the mixed deodorized gas GE.

[0039] Next, the used disposable diapers NA1 after the squeeze dewatering process are fed into the feeding hopper 20 of the drying device 2 and inserted into the rotary drying shaft 21, as shown in FIGS. On the other hand, as a heat source for heating and drying, a mixed deodorizing gas GE at about 300° C. (280 to 320° C.) is introduced from the heated steam inlet 22 via the pipe E1 shown in FIG. The rotary drying shaft 21 is supported by rotary drying shaft guides 23, 23 and is rotationally driven by a rotary driving gear 24. The used disposable diapers NA1 are rotated and agitated within the rotary drying shaft 21 for about 1 to 2 hours, and are transported to the right while being dried by the mixed deodorizing gas GE at about 300°C (280 to 320°C). The reference numerals 25, 25 denote sealing members.

[0040] In this rotary drying process, the used disposable diaper NA1 is dried and further dehydrated, and the dried used disposable diaper NA2 is discharged from the waste discharge outlet 26 at the lower right side. On the other hand, the mixed deodorized gas GE used for heating is discharged from the exhaust steam outlet 27 at the upper right side. The used disposable diaper NA2 is then dried by this drying device 2, and most of the remaining water is removed, and the used disposable diaper NA2 is dried to a moisture content of 30% or less, particularly to a moisture content of 10% or more and 30% or less.

[0041] Next, the used disposable diapers NA2 after the drying and dehydration treatment are fed into the feeding hopper 30 of the low-temperature pyrolysis carbonization device 3, as shown in Figures 1 and 4, and fed into the inner cylinder 32 of the rotary carbonization shaft by the screw feeder 31. The used paper diapers NW2 are transported to the left while being pyrolyzed at low temperature inside the inner cylinder 32 of the rotating carbonization shaft, then transported to the right while being pyrolyzed at low temperature inside the outer cylinder 33 of the rotating carbonization shaft, and further transferred by the screw conveyor 34, pass through the rotary valve 35, and are discharged as powdered carbonized material CA.

[0042] Here, the combustion exhaust gas GD generated by the carbonization exhaust gas combustion device 4 is adjusted to a low-temperature pyrolysis carbonization temperature of approximately 550°C (500°C to 600°C), and then supplied into the low-temperature pyrolysis carbonization device 3 from the combustion exhaust gas inlet 36 as shown in Figure 4 via the piping D1 shown in Figure 1 as a heat source for the low-temperature pyrolysis carbonization device 3. This allows the used paper diapers NA2 after drying to be carbonized by low-temperature pyrolysis, producing powder-like carbonized material CA. Here, in order to efficiently carry out low-temperature pyrolysis carbonization, it is preferable to insert powdered carbonized material CA into the rotating carbonization shaft inner tube 32 in advance, to a volume of approximately 1 / 3 of the rotating carbonization shaft inner tube 32, to improve heat transfer. On the other hand, the cracked gas GS generated in the low-temperature pyrolysis carbonization device 3 becomes a carbonized exhaust gas GC together with the vaporized cracked oil OL, and is discharged from the carbonized exhaust gas outlet 37. The reference numeral 38 denotes a preheating burner.

[0043] The carbonized exhaust gas GC generated from the low-temperature pyrolysis carbonization device 3 at a temperature of approximately 400°C (380 to 420°C) flows into the carbonized exhaust gas incineration device 4 from the carbonized exhaust gas inlet 40 as shown in Figure 5 via the piping C1 shown in Figure 1, and flows through the plate-type heat exchanger 46 while passing through the carbonized exhaust gas transfer pipeline 41. The carbonized exhaust gas GC is then passed through a carbonized exhaust gas transfer pipeline 42 and mixed with combustion air flowing in from a combustion air inlet 43 by a gas mixing mechanism 44, and the carbonized exhaust gas GC is burned in a carbonized exhaust gas combustion chamber 45 to generate a combustion exhaust gas GD at 800°C or higher (800 to 850°C). The wall of the carbonized exhaust gas combustion chamber 45 is provided with a large number of perforations or protrusions to facilitate mixing and agitation of the gases.

[0044] The generated combustion exhaust gas GD, which is at 800°C or higher (800 to 850°C), is then heat exchanged in the plate-type heat exchanger 46 with the carbonized exhaust gas GC, which is at about 400°C (380 to 420°C), and is finally heated to about 550°C (500 to 600°C).Then, the gas is discharged from the combustion exhaust gas outlet 47 and used as a heat source for the low-temperature pyrolysis carbonization device 3. Incidentally, reference numeral 48 denotes a carbonized exhaust gas transfer pipe that branches off from the carbonized exhaust gas transfer pipe 41 and allows the carbonized exhaust gas GC to flow.

[0045] In the plate-type heat exchanger 46, heat is exchanged between the combustion exhaust gas GD, which is generated by the carbonized exhaust gas combustion device 4 and has a temperature of 800°C or higher (800 to 850°C), and the carbonized exhaust gas GC, which is generated by the low-temperature pyrolysis carbonization device 3 and has a temperature of approximately 400°C (380 to 420°C), thereby recovering some of the heat from the combustion exhaust gas GD and raising the temperature of the carbonized exhaust gas GC after passing through it to approximately 600°C (550 to 650°C).

[0046] The dry exhaust gas GB discharged from the drying device 2 at a temperature of approximately 200°C (180 to 220°C) is passed through the piping B1 shown in Figure 1 and is introduced into the dry exhaust gas retention space 51 in the mixing deodorization device 5 by the dry exhaust gas insertion fan 50, as shown in Figure 6. On the other hand, the combustion exhaust gas GD at approximately 550°C (500 to 600°C) discharged from the carbonized exhaust gas combustion device 4 is passed through the piping D2 shown in Figure 1 and flows into the combustion exhaust gas storage cylinder 53 in the mixing deodorization device 5 from the combustion exhaust gas inlet 52, as shown in Figure 6.

[0047] Then, in the mixed gas retention space 56 partitioned by the rectifying and dispersing plates 54, 55, the dry exhaust gas GB and the combustion exhaust gas GD are mixed, and the malodorous components are decomposed and deodorized from the dry exhaust gas GB, and a mixed deodorized gas GE of about 300°C (280 to 320°C) is generated, which is discharged through the mixed deodorized gas retention space 57 and from the mixed deodorized gas outlet 58 and used as a heat source for the drying device 2.

[0048] The temperature of the mixed deodorized gas GE discharged from the mixing deodorizing device 5 is as high as about 300° C. (280 to 320° C.), so it is cooled by the fine spray cooling device 6 as shown in FIGS. The mixed deodorized gas GE is sent into the fine spray cooling tower 62 from a gas inlet 61 by a gas inlet fan 60 .

[0049] Meanwhile, cold water is supplied from a cold water tank 65 by a pressure pump 66 and sprayed into the fine spray cooling tower 62 by a fine spray spray 63. Thus, the mixed deodorized gas GE rises in the fine spray cooling tower 62 while being cooled by the atomized cold water, is cooled to about 200°C (200 to 250°C), and is discharged from a gas outlet 64 at the top end. Reference numeral 67 denotes a cooled dust outlet formed at the lower end of the fine spray cooling tower 62, through which dust, moisture, etc. are removed.

[0050] The mixed deodorized gas GE, which has been cooled to about 200°C (200 to 250°C), passes through a filter-type dust collector 7 called a bag filter that has a built-in filter (filter cloth) to remove dust, and then passes through a chimney and is released into the atmosphere.

[0051] The carbonized material CA, which has been turned into powder by the low-temperature pyrolysis carbonization device 3, is transported by a screw feeder as shown in Figure 1, filled into bags by the carbonized material bag making device 8, and stored as a product in an appropriate storage location.

[0052] 1) Used disposable diapers are organic waste discarded from homes and businesses (nurseries, elderly care facilities, hospitals, etc.). Because they contain a large amount of moisture from human waste, it has traditionally been necessary to use a large amount of auxiliary fuel (fossil fuel) when incinerating them. However, according to the organic waste recycling system of the present invention, by subjecting used paper diapers, which are organic waste, to low-temperature pyrolysis and carbonization treatment, the amount of auxiliary fuel used can be significantly reduced, and fuel costs can be significantly reduced.

[0053] 2) Furthermore, according to the organic waste recycling system of the present invention, the pyrolysis carbonized material derived from used paper diapers, which is an organic waste, can be used as a fuel to replace conventional fossil fuels, which can significantly reduce CO2 emissions and is expected to contribute to measures to combat global climate change.

[0054] 3) Furthermore, according to the organic waste recycling system of the present invention, the carbonized material produced by the low-temperature pyrolysis carbonization treatment of used disposable diapers, which are organic waste, is a carbon material consisting of a powder with minute nano-level pores, and since it is possible to recover carbon materials with high added value, it could become one of the technologies that will lead to the creation of a resource-circulating society. [Industrial Applicability]

[0055] 1) Optimization of incineration process and reduction of costs By switching from incinerating used disposable diapers to recycling them, cities, towns, and villages can significantly reduce the amount of combustible waste they produce, leading to energy savings. When incinerators are updated, this will help optimize their size and reduce the costs borne by cities, towns, and villages associated with waste disposal.

[0056] 2) Reduction of waste disposal costs For businesses that produce large amounts of used disposable diapers, switching to recycled diapers will reduce costs compared to outsourcing waste disposal.

[0057] 3) Effects on local communities The environmental benefits include efficient use of resources with high added value, reduction in landfill waste, and reduction in CO2 emissions. The collection and recycling of used disposable diapers will help revitalize local areas, and an increase in the number of cities, towns, villages, and waste disposal businesses that are working to recycle used disposable diapers will help develop the recycling industry. [Explanation of symbols]

[0058] A. Compression dehydration process B Drying process C Pyrolysis carbonization process D. Combustion waste gas generation process E Gas mixing deodorization process F. Mixed gas cooling process G. Mixed gas diffusion process H Carbonization heat source supply process J Dry heat source supply process K Carbide bag making process 1. Compression dehydration device 2 Drying equipment 3. Low-temperature pyrolysis carbonization equipment 4 Carbonized exhaust gas combustion device 45 Heat exchanger 5. Gas mixing deodorizer 6 Fine spray cooling device 7 Dust collector 8 Bag making equipment

Claims

1. a compression dehydration step of compressing and dehydrating organic waste having a moisture content of 60% or more to a moisture content of 50% or less; a drying step in which the compressed and dehydrated organic waste is further dried to a moisture content of 30% or less; a pyrolysis and carbonization process in which dried organic waste is pyrolyzed at low temperature to produce cracked oil, cracked gas, and char; a combustion exhaust gas generating step of combusting the generated decomposition gas to generate a combustion exhaust gas, exchanging heat between the combustion exhaust gas and the decomposition gas, and discharging the combustion exhaust gas after heat exchange; a gas mixing and deodorizing step of mixing the combustion exhaust gas generated in the combustion exhaust gas generating step and the dried exhaust gas generated in the drying step and deodorizing the mixture; a carbonization heat source supply step of circulating the combustion exhaust gas and using it as a heat source in the pyrolysis carbonization step; a drying heat source supplying step of circulating the mixed deodorized gas and using it as a heat source in the drying step; A method for recycling organic waste comprising:

2. 2. The organic waste recycling method according to claim 1, further comprising a gas cooling step for cooling the mixed and deodorized mixed deodorized gas, and a mixed gas diffusion step for removing dust from the cooled mixed deodorized gas and diffusing it into the atmosphere.

3. 3. The organic waste recycling method according to claim 1, wherein the organic waste is used paper diapers.

4. a compression dehydration device for compressing and dehydrating organic waste with a moisture content of 60% or more to a moisture content of 50% or less; a drying device for further drying the compressed and dehydrated organic waste to a moisture content of 30% or less; a pyrolysis and carbonization device for pyrolyzing dried organic waste at low temperatures to produce cracked oil, cracked gas, and char; a cracked gas combustion device that combusts the generated cracked gas to generate a combustion exhaust gas; and a heat exchanger that exchanges heat between the combustion exhaust gas and the cracked gas; a gas mixing deodorizing device that mixes the combustion exhaust gas generated by the decomposition gas combustion device and the dried exhaust gas generated by the drying device and deodorizes the mixture; a carbonization heat source supply pipe for circulating the combustion exhaust gas and using the gas as a heat source in the pyrolysis carbonization apparatus; a drying heat source supply pipe for circulating the deodorized mixed gas and using the gas as a heat source in the drying device; An organic waste recycling system consisting of:

5. 5. The organic waste recycling system according to claim 4, further comprising a gas cooling device for cooling the mixed and deodorized gas, and a dust collecting device for removing dust from the cooled mixed and deodorized gas.

6. 6. The organic waste recycling system according to claim 4, wherein the organic waste is used paper diapers.

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