Carbonization device and carbonization method

Abstract

The present invention is characterized in that: a carbonization section 10 includes a tubular carbonization furnace 11 in which at least an inner bottom surface is formed on an arc surface thereof, a carbonization furnace rotation shaft 12 which is disposed in the carbonization furnace interior of the tubular carbonization furnace 11, a carbonization furnace electric motor 13 which drives the carbonization furnace rotation shaft 12 so that the carbonization furnace rotation shaft 12 rotates, and a carbonization furnace inclined blade 14 which rotates with the carbonization furnace rotation shaft 12; organic matter which is supplied from one carbonization furnace end portion of the tubular carbonization furnace 11 to the carbonization furnace interior is discharged from the other carbonization furnace end portion of the tubular carbonization furnace 11 by the carbonization furnace inclined blade 14 that rotates; and superheated steam at not lower than 300°C is supplied to the carbonization furnace interior, and the superheated steam supplied to the carbonization furnace interior is discharged at not lower than 120°C from one carbonization furnace end portion. Thus, it is possible to provide a carbonization device and a carbonization method which are each for carbonizing organic matter using superheated steam as a heat source.

Description

Carbonization treatment device and carbonization treatment method

[0001] The present invention relates to a carbonization apparatus and a carbonization method for carbonizing organic matter using superheated steam.

[0002] Patent Document 1 proposes an apparatus in which a material to be treated is transported by a feed screw and superheated steam is blown in from the feed screw to continuously carbonize the material to be treated.

[0003] JP 11-223476 A

[0004] However, in Patent Document 1, the treatment tube that transports the material to be treated is heated from the outside by high-temperature combustion gas.

[0005] An object of the present invention is to provide a carbonization treatment apparatus and a carbonization treatment method for carbonizing organic matter using superheated steam as a heat source.

[0006] The carbonization treatment device of the present invention described in claim 1 is a carbonization treatment device that carbonizes organic matter using superheated steam, and the carbonization treatment unit 10 has a cylindrical carbonization furnace 11 having at least an inner bottom surface formed into an arc-shaped surface, a rotating shaft 12 for the carbonization furnace that is arranged inside the carbonization furnace of the cylindrical carbonization furnace 11, a carbonization furnace electric motor 13 that rotates the rotating shaft 12 for the carbonization furnace, and a tilted blade 14 for the carbonization furnace that is rotated by the rotating shaft 12 for the carbonization furnace, and is characterized in that the organic matter supplied from one end of the cylindrical carbonization furnace 11 to the inside of the carbonization furnace is discharged from the other end of the cylindrical carbonization furnace 11 by the rotating tilted blade 14 for the carbonization furnace, and superheated steam of 300°C or higher is supplied to the inside of the carbonization furnace, and the superheated steam supplied to the inside of the carbonization furnace is discharged from one end of the carbonization furnace at 120°C or higher. The present invention according to claim 2 is characterized in that, in the carbonization processing apparatus according to claim 1, the inclined blades 14 for the carbonization furnace have an inclination angle α in the range of 30 degrees to 60 degrees with respect to the axial direction 12s of the carbonization furnace rotating shaft 12. The present invention according to claim 3 is characterized in that, in the carbonization processing apparatus according to claim 1, a plurality of the inclined blades 14 for the carbonization furnace are arranged at a predetermined pitch T in the longitudinal direction of the carbonization furnace rotating shaft 12, and adjacent inclined blades 14 for the carbonization furnace are arranged in different radial directions 12r with respect to the carbonization furnace rotating shaft 12. The present invention according to claim 4 is characterized in that, in the carbonization processing apparatus according to claim 3, the blade length 14H of the inclined blades 14 for the carbonization furnace in the longitudinal direction of the carbonization furnace rotating shaft 12 is longer than the predetermined pitch T. The present invention described in claim 5 is characterized in that, in the carbonization treatment device described in claim 3, when the inclined blades 14 for the carbonization furnace are arranged in the order of inclined blades 14A for the carbonization furnace, inclined blades 14B for the carbonization furnace, and inclined blades 14C for the carbonization furnace from the upstream side in the direction of movement of the organic matter, the inclined blades 14B for the carbonization furnace are arranged in the radial direction 12r shifted by 120 degrees in the counter-rotation direction of the rotating shaft 12 for the carbonization furnace relative to the inclined blades 14A for the carbonization furnace, and the inclined blades 14C for the carbonization furnace are arranged in the radial direction 12r shifted by 120 degrees in the counter-rotation direction of the rotating shaft 12 for the carbonization furnace relative to the inclined blades 14B for the carbonization furnace.The present invention described in claim 6 is characterized in that, in the carbonization treatment device described in claim 1, the inclined blade 14 for the carbonization furnace is attached to the tip of the blade connection piece 16 for the carbonization furnace extending from the rotating shaft 12 for the carbonization furnace in the radial direction 12r of the rotating shaft 12 for the carbonization furnace, the radial blade length 14j of the inclined blade 14 for the carbonization furnace is made smaller than the radial connection piece length 16j of the blade connection piece 16 for the carbonization furnace, and the blade width 14k of the inclined blade 14 for the carbonization furnace is made larger than the connection piece width 16k of the blade connection piece 16 for the carbonization furnace. The present invention of claim 7 provides the carbonization treatment apparatus of claim 1, further comprising a drying treatment section 20 for drying the organic matter supplied to the carbonization treatment section 10, the drying treatment section 20 comprising a cylindrical drying oven 21 having at least an inner bottom surface formed into an arcuate surface, a drying oven rotation shaft 22 disposed inside the cylindrical drying oven 21, a drying oven motor 23 for rotating the drying oven rotation shaft 22, and a drying oven tilt blade 24 rotated by the drying oven rotation shaft 22, The organic matter supplied from one end of the drying furnace into the interior of the drying furnace is discharged from the other end of the drying furnace by the rotating tilted drying furnace blades 24, the organic matter discharged from the other end of the drying furnace is supplied into the carbonization furnace from one end of the carbonization furnace, the superheated steam discharged from the one end of the carbonization furnace is supplied into the drying furnace from the other end of the drying furnace, and the superheated steam supplied into the drying furnace is discharged from the one end of the drying furnace. The present invention as set forth in claim 8 is the carbonization treatment apparatus as set forth in claim 7, characterized in that the tilted drying furnace blades 24 are inclined at an angle α of 30 degrees to 60 degrees with respect to the axial direction of the drying furnace rotation shaft 22. The present invention as set forth in claim 9 is characterized in that, in the carbonization processing apparatus as set forth in claim 7, the plurality of inclined drying oven blades 24 are arranged at a predetermined pitch T in the longitudinal direction of the drying oven rotation shaft 22, and adjacent inclined drying oven blades 24 are arranged in different radial directions 12r with respect to the drying oven rotation shaft 22. The present invention as set forth in claim 10 is characterized in that, in the carbonization processing apparatus as set forth in claim 9, the blade length 14H in the longitudinal direction of the drying oven rotation shaft 22 of the inclined drying oven blades 24 is longer than the predetermined pitch T.The present invention of claim 11 is characterized in that, in the carbonization treatment apparatus of claim 9, when the drying oven tilted blades 24 are arranged in order from the upstream side in the direction of movement of the organic matter, the drying oven tilted blade 24B is disposed in the radial direction 12r offset by 120 degrees from the drying oven tilted blade 24A in the counter-rotation direction of the drying oven rotating shaft 22, and the drying oven tilted blade 24C is disposed in the radial direction 12r offset by 120 degrees from the drying oven tilted blade 24B in the counter-rotation direction of the drying oven rotating shaft 22. The present invention of claim 12 is characterized in that, in the carbonization treatment apparatus of claim 7, the superheated steam discharged from one end of the drying oven is set to 120° C. or higher. The present invention of claim 13 is characterized in that, in the carbonization treatment device of claim 7, one end of the drying furnace has a steam exhaust section 26 that exhausts the superheated steam and an organic matter supply section 25 that supplies the organic matter into the drying furnace, the steam exhaust section 26 has a draft space 26a connected to one end of the drying furnace, a steam exhaust tube 26b connected to the upper part of the draft space 26a, and a valve 26c that changes the passage area of ​​the steam exhaust tube 26b, and by adjusting the amount of superheated steam that is naturally exhausted from the steam exhaust tube 26b by the valve 26c, the superheated steam is not exhausted from the organic matter supply section 25. The present invention described in claim 14 is characterized in that, in the carbonization treatment device described in claim 7, the inclined blades 24 for the drying oven are attached to the tips of the blade connecting pieces for the drying oven extending from the rotating shaft 22 for the drying oven in the radial direction 12r of the rotating shaft 22 for the drying oven, the radial blade length 14j of the inclined blades 24 for the drying oven is made smaller than the radial connecting piece length 16j, and the blade width 14k of the inclined blades 24 for the drying oven is made larger than the connecting piece width 16k of the blade connecting piece for the drying oven.The present invention of claim 15 provides the carbonization processing apparatus of claim 1, further comprising a drying processing section 20 for drying the organic matter supplied to the carbonization processing section 10, the drying processing section 20 including a first drying processing section 20X and a second drying processing section 20Y, the first drying processing section 20X including a first cylindrical drying oven 21X having at least an inner bottom surface formed into a circular arc surface, a first drying oven rotation shaft 22X disposed inside the first drying oven of the first cylindrical drying oven 21X, and a rotary drive shaft for rotating the first drying oven rotation shaft 22X. The second drying processing unit 20Y includes a second cylindrical drying oven 21Y having at least an inner bottom surface formed into an arcuate surface, a second drying oven rotation shaft 22Y disposed inside the second drying oven of the second cylindrical drying oven 21Y, a second drying oven motor 23Y that rotates the second drying oven rotation shaft 22Y, and a second drying oven tilted blade 24X that rotates by the second drying oven rotation shaft 22Y. The organic matter supplied from one end of the first drying oven to the inside of the first cylindrical drying oven 21X is discharged from the other end of the first drying oven of the first cylindrical drying oven 21X by the rotating tilted blades for the first drying oven 24X, the organic matter discharged from the other end of the first drying oven is supplied from one end of the second drying oven to the inside of the second drying oven, and the organic matter supplied from the inside of the second drying oven is discharged from the other end of the second drying oven to the other end of the second cylindrical drying oven by the rotating tilted blades for the second drying oven 24Y. The present invention according to claim 16 is characterized in that, in the carbonization treatment apparatus according to claim 15, the first drying oven tilted blades (24X) are inclined at an angle α of 30 to 60 degrees with respect to the axial direction of the first drying oven rotation shaft (22X), and the second drying oven tilted blades (24Y) are inclined at an angle α of 30 to 60 degrees with respect to the axial direction of the second drying oven rotation shaft (22Y).The present invention of claim 17 is characterized in that, in the carbonization treatment device of claim 15, the multiple first drying oven inclined blades 24X are arranged at a predetermined pitch T in the longitudinal direction of the first drying oven rotating shaft 22X, and adjacent first drying oven inclined blades 24X are arranged in different radial directions 12r relative to the first drying oven rotating shaft 22X, and the multiple second drying oven inclined blades 24Y are arranged at a predetermined pitch T in the longitudinal direction of the second drying oven rotating shaft 22Y, and adjacent second drying oven inclined blades 24Y are arranged in different radial directions 12r relative to the second drying oven rotating shaft 22Y. The present invention of claim 18 is characterized in that, in the carbonization treatment device of claim 17, the longitudinal blade length 14H of the first drying furnace rotating shaft 22X of the first drying furnace inclined blade 24X is longer than the specified pitch T, and the longitudinal blade length 14H of the second drying furnace rotating shaft 22Y of the second drying furnace inclined blade 24Y is longer than the specified pitch T. The present invention of claim 19 provides the carbonization treatment apparatus of claim 17, wherein when a first drying oven inclined blade 24XA, a first drying oven inclined blade 24XB, and a first drying oven inclined blade 24XC are arranged in this order from the upstream side in the moving direction of the organic matter as the first drying oven inclined blade 24X, the first drying oven inclined blade 24XB is disposed in the radial direction 12r shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft 22 with respect to the first drying oven inclined blade 24XA, and the first drying oven inclined blade 24XC is disposed in the radial direction 12r shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft 22 with respect to the first drying oven inclined blade 24XB. When the second drying oven inclined blade 24Y is configured as a second drying oven inclined blade 24YA, a second drying oven inclined blade 24YB, and a second drying oven inclined blade 24YC arranged in that order from the upstream side in the direction of movement of the organic matter, the second drying oven inclined blade 24YB is arranged in the radial direction 12r shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft 22 relative to the second drying oven inclined blade 24YA, and the second drying oven inclined blade 24YC is arranged in the radial direction 12r shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft 22 relative to the second drying oven inclined blade 24YB.The present invention of claim 20 is characterized in that, in the carbonization treatment apparatus of claim 15, the superheated steam discharged from one end of the first drying furnace is set to 120° C. or higher. The present invention of claim 21 is characterized in that, in the carbonization treatment apparatus of claim 15, one end of the first drying furnace includes a steam exhaust unit 26 that discharges the superheated steam and an organic matter supply unit 25 that supplies the organic matter into the drying furnace, the steam exhaust unit 26 includes a draft space 26a connected to the one end of the drying furnace, a steam exhaust stack 26b connected to an upper part of the draft space 26a, and a valve 26c that changes the passage area of ​​the steam exhaust stack 26b, and by adjusting the amount of superheated steam naturally exhausted from the steam exhaust stack 26b with the valve 26c, the superheated steam is not discharged from the organic matter supply unit 25. The present invention of claim 22 provides the carbonization treatment apparatus of claim 15, wherein the first drying oven inclined blade 24X is attached to a tip of a first drying oven blade connecting piece extending from the first drying oven rotating shaft 22X in a radial direction 12r of the first drying oven rotating shaft 22X, and a radial blade length 14j of the first drying oven inclined blade 24X is made smaller than a radial connecting piece length 16j of the first drying oven blade connecting piece, and a blade width 14k of the first drying oven inclined blade 24X is made smaller than a connecting piece length 16j of the first drying oven blade connecting piece. The second drying oven tilted blade 24Y is attached to a tip of a second drying oven blade connecting piece extending from the second drying oven rotating shaft 22Y in the radial direction 12r of the second drying oven rotating shaft 22Y, the radial blade length 14j of the second drying oven tilted blade 24Y is smaller than the radial connecting piece length 16j of the second drying oven blade connecting piece, and the blade width 14k of the second drying oven tilted blade 24Y is larger than the connecting piece width 16k of the second drying oven blade connecting piece. A carbonization method according to a twenty-third aspect of the present invention is a carbonization method using the carbonization treatment device according to any one of the first to twenty-second aspects, wherein the moisture content of the organic matter supplied to the carbonization furnace is 10% or less. The carbonization treatment method of the present invention described in claim 24 is a carbonization treatment method using a carbonization treatment device described in any one of claims 7 to 14, characterized in that the rotation speed of the drying furnace motor 23 is faster than that of the carbonization furnace motor 13.A carbonization treatment method of the present invention described in claim 25 is a carbonization treatment method using the carbonization treatment device described in any one of claims 15 to 22, characterized in that the rotation speed of the second drying oven motor 23Y is faster than that of the carbonization oven motor 13, and the rotation speed of the first drying oven motor 23X is faster than that of the second drying oven motor 23Y. A carbonization treatment method of the present invention described in claim 26 is a carbonization treatment method using the carbonization treatment device described in any one of claims 15 to 22, characterized in that the organic matter supplied to the first drying oven is powdered dried sludge obtained by drying dewatered sludge. A carbonization treatment method of the present invention described in claim 27 is a carbonization treatment method using the carbonization treatment device described in any one of claims 15 to 22, characterized in that the inside of the carbonization oven is set to 300°C or higher, the inside of the second drying oven is set to 170°C or higher, and the inside of the first drying oven is set to 120°C or higher. The carbonization treatment method of the present invention described in claim 28 is a carbonization treatment method using a carbonization treatment device described in any one of claims 15 to 22, characterized in that the volume ratio of the organic matter remaining inside the first drying furnace to the volume inside the first drying furnace is 25% or less.

[0007] According to the carbonization treatment apparatus of the present invention, the organic matter can be efficiently carbonized by flowing superheated steam in the direction in which the organic matter is supplied inside the carbonization furnace.

[0008] FIG. 1 is a conceptual diagram of a carbonization treatment apparatus according to one embodiment of the present invention; FIG. 2 is a conceptual diagram of a carbonization treatment apparatus according to another embodiment of the present invention; FIG. 3 is a diagram showing the inclined blades for the carbonization furnace described in FIG. 1 and FIG. 2; and FIG. 4 is a perspective view showing the inclined blades for the carbonization furnace.

[0009] In a first embodiment of the present invention, the carbonization processing unit includes a cylindrical carbonization furnace having at least an arc-shaped inner bottom surface, a carbonization furnace rotating shaft disposed inside the cylindrical carbonization furnace, a carbonization furnace electric motor for driving the carbonization furnace rotating shaft, and a carbonization furnace inclined blades rotated by the carbonization furnace rotating shaft. Organic matter supplied from one end of the cylindrical carbonization furnace to the inside of the carbonization furnace is discharged from the other end of the cylindrical carbonization furnace by the rotating carbonization furnace inclined blades. Superheated steam of 300°C or higher is supplied to the carbonization furnace, and the superheated steam supplied to the carbonization furnace is discharged from the one end of the carbonization furnace at 120°C or higher. According to this embodiment, the organic matter can be efficiently carbonized by flowing superheated steam inside the carbonization furnace in the direction in which the organic matter is supplied.

[0010] In a second embodiment of the present invention, the carbonization treatment apparatus according to the first embodiment has the inclination angle of the carbonization furnace inclined blades ranging from 30 to 60 degrees relative to the axial direction of the carbonization furnace rotation shaft. If the inclination angle is less than 30 degrees, organic matter tends to adhere to the carbonization furnace inclined blades, while if the inclination angle exceeds 60 degrees, organic matter remains between adjacent carbonization furnace inclined blades. Narrowing the spacing between adjacent carbonization furnace inclined blades to prevent organic matter from remaining between adjacent carbonization furnace inclined blades increases the number of carbonization furnace inclined blades and the blade volume, which impairs the flow of superheated steam and removes heat from the superheated steam, resulting in poor carbonization treatment efficiency. This embodiment reduces adhesion of organic matter to the carbonization furnace inclined blades and allows the superheated steam to flow efficiently.

[0011] In the third embodiment of the present invention, in the carbonization treatment apparatus according to the first embodiment, a plurality of inclined vanes for the carbonization furnace are arranged at a predetermined pitch in the longitudinal direction of the carbonization furnace rotation shaft, and adjacent inclined vanes for the carbonization furnace are arranged in different radial directions relative to the carbonization furnace rotation shaft. According to this embodiment, organic matter can be efficiently moved with a small number of inclined vanes for the carbonization furnace, and superheated steam can be efficiently circulated.

[0012] In the fourth embodiment of the present invention, the blade length in the longitudinal direction of the carbonization furnace rotation shaft of the inclined blades for the carbonization furnace in the carbonization treatment apparatus according to the third embodiment is longer than the predetermined pitch. According to this embodiment, the front end of the adjacent inclined blade for the carbonization furnace located downstream is located upstream of the rear end of the inclined blade for the carbonization furnace located upstream, so that organic matter does not remain between adjacent inclined blades for the carbonization furnace.

[0013] In a fifth embodiment of the present invention, in the carbonization treatment apparatus according to the third embodiment, when the carbonization furnace inclined blades are arranged in order from the upstream side in the direction of organic matter movement, the carbonization furnace inclined blade B is disposed radially offset by 120 degrees in the counter-rotation direction of the carbonization furnace rotating shaft relative to the carbonization furnace inclined blade A, and the carbonization furnace inclined blade C is disposed radially offset by 120 degrees in the counter-rotation direction of the carbonization furnace rotating shaft relative to the carbonization furnace inclined blade B. According to this embodiment, by offsetting the respective carbonization furnace inclined blades by 120 degrees, organic matter can be efficiently moved with a small number of carbonization furnace inclined blades, and superheated steam can be efficiently circulated.

[0014] In a sixth embodiment of the present invention, in the carbonization treatment apparatus according to the first embodiment, the inclined blades for the carbonization furnace are attached to the tips of the blade connecting pieces for the carbonization furnace that extend radially from the carbonization furnace rotating shaft, and the radial blade length of the inclined blades for the carbonization furnace is made smaller than the radial connecting piece length of the blade connecting piece for the carbonization furnace, and the blade width of the inclined blades for the carbonization furnace is made larger than the connecting piece width of the blade connecting piece for the carbonization furnace. This embodiment allows efficient movement of organic matter and efficient flow of superheated steam.

[0015] A seventh embodiment of the present invention is the carbonization processing apparatus according to the first embodiment, further comprising a drying processing section for drying organic matter supplied to the carbonization processing section, the drying processing section including a cylindrical drying furnace having at least an arc-shaped inner bottom surface, a drying furnace rotating shaft disposed within the cylindrical drying furnace, a drying furnace electric motor for driving the drying furnace rotating shaft, and a tilted drying furnace blade rotated by the drying furnace rotating shaft. The organic matter supplied from one end of the cylindrical drying furnace to the inside of the drying furnace is discharged from the other end of the cylindrical drying furnace by the rotating tilted drying furnace blade. The organic matter discharged from the other end of the drying furnace is supplied into the carbonization furnace from the one end of the carbonization furnace. The superheated steam discharged from the one end of the carbonization furnace is supplied into the drying furnace from the other end of the drying furnace. The superheated steam supplied into the drying furnace is discharged from the one end of the drying furnace. According to this embodiment, the organic matter can be efficiently dried by flowing superheated steam inside the drying furnace in the direction in which the organic matter is supplied.

[0016] The eighth embodiment of the present invention is the carbonization treatment apparatus according to the seventh embodiment, in which the drying oven inclined blades are inclined at an angle ranging from 30 to 60 degrees relative to the axial direction of the drying oven rotation shaft. According to this embodiment, if the inclination angle is less than 30 degrees, organic matter tends to adhere to the drying oven inclined blades, while if the inclination angle is greater than 60 degrees, organic matter remains between adjacent drying oven inclined blades. Narrowing the spacing between adjacent drying oven inclined blades to prevent organic matter from remaining between adjacent drying oven inclined blades increases the number of drying oven inclined blades and the blade volume, which impairs the flow of superheated steam and removes heat from the superheated steam, resulting in poor drying process efficiency. This embodiment reduces adhesion of organic matter to the drying oven inclined blades and allows the superheated steam to flow efficiently.

[0017] In the ninth embodiment of the present invention, in the carbonization treatment apparatus according to the seventh embodiment, a plurality of tilted blades for drying ovens are arranged at a predetermined pitch in the longitudinal direction of the drying oven rotation shaft, and adjacent tilted blades for drying ovens are arranged in different radial directions relative to the drying oven rotation shaft. This embodiment enables efficient transfer of organic matter with a small number of tilted blades for drying ovens and efficient flow of superheated steam.

[0018] In the tenth embodiment of the present invention, the blade length in the longitudinal direction of the drying furnace rotation shaft of the tilted blade for drying furnace in the carbonization treatment apparatus according to the ninth embodiment is longer than the predetermined pitch. According to this embodiment, the front end of the adjacent tilted blade for drying furnace located downstream is located upstream of the rear end of the adjacent tilted blade for drying furnace located upstream, so that organic matter does not remain between adjacent tilted blade for drying furnace.

[0019] In an eleventh embodiment of the present invention, in the carbonization treatment apparatus according to the ninth embodiment, the drying oven inclined blades are arranged in the order of drying oven inclined blade A, drying oven inclined blade B, and drying oven inclined blade C, from the upstream side in the direction of organic matter movement, with the drying oven inclined blade B being radially shifted 120 degrees in the counter-rotational direction of the drying oven rotating shaft relative to the drying oven inclined blade A, and the drying oven inclined blade C being radially shifted 120 degrees in the counter-rotational direction of the drying oven rotating shaft relative to the drying oven inclined blade B. According to this embodiment, by shifting the respective drying oven inclined blades by 120 degrees, organic matter can be efficiently moved with a small number of drying oven inclined blades, and superheated steam can be efficiently circulated.

[0020] The twelfth embodiment of the present invention is the carbonization treatment apparatus according to the seventh embodiment, except that the superheated steam discharged from one end of the drying furnace is set to a temperature of 120° C. or higher. According to this embodiment, by setting the discharged superheated steam to 120° C. or higher, condensation of organic matter supplied to the one end of the drying furnace can be prevented, and drying treatment can be carried out efficiently.

[0021] A thirteenth embodiment of the present invention relates to the carbonization treatment apparatus of the seventh embodiment, and further relates to a drying furnace having, at one end thereof, a steam exhaust section for exhausting superheated steam and an organic matter supply section for supplying organic matter into the drying furnace, the steam exhaust section having a draft space connected to the one end thereof, a steam exhaust tube connected to the upper part of the draft space, and a valve for changing the passage area of ​​the steam exhaust tube, and the valve is used to adjust the amount of superheated steam naturally exhausted from the steam exhaust tube, thereby preventing superheated steam from being exhausted from the organic matter supply section. According to this embodiment, the draft space can enhance the flow of natural exhaust, and the valve is used to adjust the amount of superheated steam naturally exhausted, thereby preventing condensation of organic matter supplied from the organic matter supply section.

[0022] In a fourteenth embodiment of the present invention, in the carbonization treatment apparatus according to the seventh embodiment, the tilted blades for the drying oven are attached to the tips of the blade connecting pieces that extend radially from the drying oven rotating shaft, and the radial blade length of the tilted blades for the drying oven is made smaller than the radial connecting piece length of the blade connecting piece, and the blade width of the tilted blades for the drying oven is made larger than the connecting piece width of the blade connecting piece. This embodiment allows efficient movement of organic matter and efficient flow of superheated steam.

[0023] A fifteenth embodiment of the present invention is a carbonization treatment apparatus according to the first embodiment, which has a drying treatment section for drying organic matter supplied to the carbonization treatment section, and which includes a first drying treatment section and a second drying treatment section, wherein the first drying treatment section includes a first cylindrical drying oven having at least an inner bottom surface formed into a circular arc surface, a first drying oven rotating shaft disposed inside the first drying oven of the first cylindrical drying oven, a first drying oven motor for driving and rotating the first drying oven rotating shaft, and a first drying oven tilted blade rotated by the first drying oven rotating shaft, and the second drying treatment section includes a second cylindrical drying oven having at least an inner bottom surface formed into a circular arc surface, a second drying oven rotating shaft disposed inside the second drying oven of the second cylindrical drying oven, a second drying oven motor for driving and rotating the second drying oven rotating shaft, and a second drying oven tilted blade rotated by the second drying oven rotating shaft. The organic matter supplied from one end of the first cylindrical drying oven to the inside of the first drying oven is discharged from the other end of the first drying oven by the rotating tilted blades for the first drying oven, the organic matter discharged from the other end of the first drying oven is supplied from one end of the second drying oven to the inside of the second drying oven, the organic matter supplied to the inside of the second drying oven is discharged from the other end of the second cylindrical drying oven by the rotating tilted blades for the second drying oven, the organic matter discharged from the other end of the second drying oven is supplied from one end of the carbonization oven to the inside of the carbonization oven, the superheated steam discharged from one end of the carbonization oven is supplied from the other end of the second drying oven to the inside of the second drying oven, the superheated steam supplied to the inside of the second drying oven is supplied from the other end of the first drying oven to the inside of the first drying oven, and the superheated steam supplied to the inside of the first drying oven is discharged from one end of the first drying oven. According to this embodiment, the organic matter can be efficiently dried by flowing superheated steam in the direction in which the organic matter is supplied inside the first drying furnace and the second drying furnace.

[0024] A sixteenth embodiment of the present invention is the carbonization treatment apparatus according to the fifteenth embodiment, wherein the first drying oven inclined blades are inclined at an angle of 30 to 60 degrees relative to the axial direction of the first drying oven rotating shaft, and the second drying oven inclined blades are inclined at an angle of 30 to 60 degrees relative to the axial direction of the second drying oven rotating shaft. This embodiment can reduce adhesion of organic matter to the first drying oven inclined blades and the second drying oven inclined blades, and can efficiently flow superheated steam.

[0025] In a seventeenth embodiment of the present invention, in the carbonization treatment apparatus according to the fifteenth embodiment, a plurality of first drying oven inclined blades are arranged at a predetermined pitch along the longitudinal direction of the first drying oven rotating shaft, and adjacent first drying oven inclined blades are arranged in different radial directions relative to the first drying oven rotating shaft, and a plurality of second drying oven inclined blades are arranged at a predetermined pitch along the longitudinal direction of the second drying oven rotating shaft, and adjacent second drying oven inclined blades are arranged in different radial directions relative to the second drying oven rotating shaft. This embodiment enables efficient movement of organic matter and efficient flow of superheated steam with a small number of first drying oven inclined blades and second drying oven inclined blades.

[0026] In an eighteenth embodiment of the present invention, in the carbonization treatment apparatus according to the seventeenth embodiment, the longitudinal blade length of the first drying oven rotating shaft of the first drying oven inclined blade is longer than the predetermined pitch, and the longitudinal blade length of the second drying oven rotating shaft of the second drying oven inclined blade is longer than the predetermined pitch. According to this embodiment, the leading end of the adjacent downstream first drying oven inclined blade is located more upstream than the trailing end of the upstream first drying oven inclined blade, so that organic matter does not remain between adjacent first drying oven inclined blades. Furthermore, the leading end of the adjacent downstream second drying oven inclined blade is located more upstream than the trailing end of the upstream second drying oven inclined blade, so that organic matter does not remain between adjacent second drying oven inclined blades.

[0027] In a 19th embodiment of the present invention, in the carbonization treatment apparatus according to the 17th embodiment, when the first drying oven inclined blades are arranged in order from the upstream side in the moving direction of the organic matter, the first drying oven inclined blade A, the first drying oven inclined blade B, and the first drying oven inclined blade C are arranged in a radial direction shifted by 120 degrees from the first drying oven inclined blade A in the counter-rotation direction of the drying oven rotation shaft, and the first drying oven inclined blade C is arranged in a radial direction shifted by 120 degrees from the first drying oven inclined blade B in the counter-rotation direction of the drying oven rotation shaft. In the case where the second drying oven inclined blades are arranged in the order of second drying oven inclined blade A, second drying oven inclined blade B, and second drying oven inclined blade C from the upstream side in the direction of organic material movement, the second drying oven inclined blade B is arranged radially offset by 120 degrees in the counter-rotational direction of the drying oven shaft relative to the second drying oven inclined blade A, and the second drying oven inclined blade C is arranged radially offset by 120 degrees in the counter-rotational direction of the drying oven shaft relative to the second drying oven inclined blade B. According to this embodiment, by offsetting each first drying oven inclined blade by 120 degrees, organic material can be efficiently moved with a small number of first drying oven inclined blades, and superheated steam can be efficiently circulated. Furthermore, by offsetting each second drying oven inclined blade by 120 degrees, organic material can be efficiently moved with a small number of second drying oven inclined blades, and superheated steam can be efficiently circulated.

[0028] A twentieth embodiment of the present invention is the carbonization treatment apparatus according to the fifteenth embodiment, in which the superheated steam discharged from one end of the first drying furnace is set to 120° C. or higher. According to this embodiment, by setting the discharged superheated steam to 120° C. or higher, condensation of organic matter supplied to one end of the first drying furnace can be prevented, and drying treatment can be carried out efficiently.

[0029] A 21st embodiment of the present invention relates to the carbonization treatment apparatus of the 15th embodiment, and further relates to a first drying furnace having, at one end thereof, a steam exhaust section for exhausting superheated steam and an organic matter supply section for supplying organic matter into the drying furnace, the steam exhaust section having a draft space connected to the one end thereof, a steam exhaust tube connected to the upper part of the draft space, and a valve for changing the passage area of ​​the steam exhaust tube, and the valve is used to adjust the amount of superheated steam naturally exhausted from the steam exhaust tube, thereby preventing superheated steam from being exhausted from the organic matter supply section. According to this embodiment, the draft space can enhance the flow of natural exhaust, and the valve is used to adjust the amount of superheated steam naturally exhausted, thereby preventing condensation of organic matter supplied from the supply port.

[0030] A twenty-second embodiment of the present invention relates to the carbonization treatment apparatus of the fifteenth embodiment, and further includes a first tilted blade attached to a tip of a first connecting piece extending radially from the first rotating shaft, the first connecting piece having a radial length shorter than the connecting piece length of the first connecting piece, and a blade width longer than the connecting piece width of the first connecting piece. The second tilted blade is attached to a tip of a second connecting piece extending radially from the second rotating shaft, the second connecting piece having a radial length shorter than the connecting piece length of the second connecting piece, and a blade width longer than the connecting piece width of the second connecting piece. This embodiment allows for efficient transport of organic matter and efficient flow of superheated steam.

[0031] A carbonization method according to a 23rd embodiment of the present invention is a carbonization method using the carbonization treatment apparatus according to any one of the first to 22nd embodiments, in which the moisture content of the organic matter supplied to the carbonization furnace is set to 10% or less. According to this embodiment, the carbonization efficiency can be improved.

[0032] A carbonization method according to a 24th embodiment of the present invention is a carbonization method using the carbonization treatment apparatus described in any one of the seventh to fourteenth embodiments, in which the rotation speed of the drying oven motor is faster than that of the carbonization oven motor. According to this embodiment, since the weight loss rate of organic matter is greater in the drying treatment section than in the carbonization treatment section, the processing efficiency can be improved by making the rotation speed of the drying oven motor faster than that of the carbonization oven motor.

[0033] A carbonization method according to a 25th embodiment of the present invention is a carbonization method using the carbonization treatment apparatus according to any one of the 15th to 22nd embodiments, in which the rotation speed of the second drying oven motor is made faster than that of the carbonization oven motor, and the rotation speed of the first drying oven motor is made faster than that of the second drying oven motor. According to this embodiment, the weight loss rate of organic matter is greater in the second drying section than in the carbonization section, and the weight loss rate of organic matter is greater in the first drying section than in the second drying section, so by making the rotation speed of the second drying oven motor faster than that of the carbonization oven motor and the rotation speed of the first drying oven motor faster than that of the second drying oven motor, it is possible to improve treatment efficiency.

[0034] A carbonization method according to a 26th embodiment of the present invention is a carbonization method using the carbonization treatment apparatus according to any one of the 15th to 22nd embodiments, in which the organic matter supplied to the first drying furnace is powdered dried sludge obtained by drying dewatered sludge. According to this embodiment, the carbonization efficiency can be improved.

[0035] A carbonization method according to a 27th embodiment of the present invention is a carbonization method using the carbonization treatment apparatus according to any one of the 15th to 22nd embodiments, in which the inside of the carbonization furnace is set to 300° C. or higher, the inside of the second drying furnace is set to 170° C. or higher, and the inside of the first drying furnace is set to 120° C. or higher. According to this embodiment, by setting the inside of the carbonization furnace to 300° C. or higher, carbonization can be carried out reliably, by setting the inside of the second drying furnace to 170° C. or higher, the drying efficiency can be improved by taking advantage of the properties of superheated steam, and by setting the inside of the first drying furnace to 120° C. or higher, drying efficiency can be improved.

[0036] A carbonization method according to a 28th embodiment of the present invention is a carbonization method using the carbonization treatment apparatus according to any one of the 15th to 22nd embodiments, in which the volume ratio of organic matter remaining inside the first drying furnace to the volume inside the first drying furnace is set to 25% or less. According to this embodiment, the flow of superheated steam is promoted, sufficient contact between the superheated steam and the organic matter is achieved, and drying and carbonization processes using the superheated steam can be performed effectively.

[0037] A carbonization treatment apparatus according to one embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a conceptual diagram of a carbonization treatment apparatus according to one embodiment of the present invention. The carbonization treatment apparatus according to this embodiment includes a carbonization treatment unit 10 that carbonizes organic matter using superheated steam, a drying treatment unit 20 that dries the organic matter supplied to the carbonization treatment unit 10, and a superheated steam generator 30 that generates superheated steam. The drying treatment unit 20 is disposed above the carbonization treatment unit 10. The carbonization treatment unit 10 and the drying treatment unit 20 are each disposed horizontally, but by tilting them between 1 and 5 degrees so that the downstream side of the superheated steam is higher, natural exhaust of the superheated steam can be further promoted.

[0038] The carbonization processing section 10 has a cylindrical carbonization furnace 11 having at least an inner bottom surface formed into an arcuate surface, a carbonization furnace rotating shaft 12 arranged inside the cylindrical carbonization furnace 11, a carbonization furnace electric motor 13 that rotates the carbonization furnace rotating shaft 12, and a carbonization furnace tilted blade 14 that is rotated by the carbonization furnace rotating shaft 12. The drying processing section 20 has a cylindrical drying furnace 21 having at least an inner bottom surface formed into an arcuate surface, a drying furnace rotating shaft 22 arranged inside the cylindrical drying furnace 21, a drying furnace electric motor 23 that rotates the drying furnace rotating shaft 22, and a drying furnace tilted blade 24 that is rotated by the drying furnace electric motor 23.

[0039] One end of the drying furnace in the drying processing unit 20 includes a steam exhaust unit 26 that exhausts superheated steam and an organic matter supply unit 25 that supplies organic matter into the drying furnace. The steam exhaust unit 26 includes a draft space 26a connected to one end of the drying furnace, a steam exhaust stack 26b connected to the top of the draft space 26a, and a valve 26c that changes the passage area of ​​the steam exhaust stack 26b. The valve 26c adjusts the amount of superheated steam naturally exhausted from the steam exhaust stack 26b so as not to exhaust superheated steam from the organic matter supply unit 25. The draft space 26a can also enhance the flow of natural exhaust. In this way, by adjusting the amount of naturally exhausted superheated steam with the valve 26c and not exhausting superheated steam from the supply unit, condensation of the organic matter supplied from the organic matter supply unit 25 can be prevented.

[0040] Organic matter supplied from one end of the cylindrical drying furnace 21 into the interior of the drying furnace is discharged from the other end of the drying furnace by the rotating tilted blades for the drying furnace 24, and organic matter discharged from the other end of the drying furnace is supplied from one end of the carbonization furnace of the carbonization processing unit 10 into the interior of the carbonization furnace, and organic matter supplied from one end of the cylindrical carbonization furnace 11 into the interior of the carbonization furnace is discharged from the other end of the cylindrical carbonization furnace 11 by the rotating tilted blades for the carbonization furnace 14. An outlet 15 is formed at the bottom of the other end of the cylindrical carbonization furnace 11.

[0041] Superheated steam at 300°C or higher generated by the superheated steam generator 30 is supplied to the carbonization treatment unit 10. The superheated steam supplied to the carbonization treatment unit 10 is supplied from one end of the carbonization furnace to the cylindrical drying furnace 21. The superheated steam supplied into the carbonization furnace is discharged from one end of the carbonization furnace at 120°C or higher. The superheated steam supplied from the other end of the cylindrical drying furnace 21 into the drying furnace is naturally exhausted from the steam exhaust unit 26 at one end of the drying furnace. As shown in Figure 1, no fan or the like is provided to forcibly exhaust the superheated steam.

[0042] As shown in this embodiment, the organic matter can be efficiently carbonized by flowing superheated steam in the direction in which the organic matter is supplied inside the carbonization furnace of the carbonization processing unit 10 and inside the drying furnace of the drying processing unit 20.

[0043] In the carbonization treatment apparatus shown in this embodiment, it is preferable to perform treatment by setting the rotation speed of the drying furnace motor 23 to be faster than that of the carbonization furnace motor 13. Because the weight loss rate of organic matter is greater in the drying treatment unit 20 than in the carbonization treatment unit 10, treatment efficiency can be improved by setting the rotation speed of the drying furnace motor 23 to be faster than that of the carbonization furnace motor 13. Note that the carbonization treatment efficiency can be improved by setting the moisture content of the organic matter supplied into the carbonization furnace to 10% or less, more preferably 6% or less.

[0044] 2 is a conceptual diagram of a carbonization treatment apparatus according to another embodiment of the present invention. The carbonization treatment apparatus according to this embodiment includes a carbonization treatment section 10 that carbonizes organic matter using superheated steam, a drying treatment section 20 that dries the organic matter supplied to the carbonization treatment section 10, and a superheated steam generator 30 that generates superheated steam. In this carbonization treatment apparatus, the drying treatment section 20 includes a first drying treatment section 20X and a second drying treatment section 20Y. The first drying treatment section 20X is disposed above the second drying treatment section 20Y, and the second drying treatment section 20Y is disposed above the carbonization treatment section 10. The carbonization treatment section 10, the first drying treatment section 20X, and the second drying treatment section 20Y are each disposed horizontally, but by tilting them by 1 to 5 degrees so that the downstream side of the superheated steam is higher, natural exhaust of the superheated steam can be further promoted.

[0045] The carbonization processing unit 10 includes a cylindrical carbonization furnace 11 having at least an inner bottom surface formed into an arcuate surface, a carbonization furnace rotating shaft 12 arranged inside the cylindrical carbonization furnace 11, a carbonization furnace motor 13 that rotates the carbonization furnace rotating shaft 12, and a carbonization furnace tilted blade 14 that is rotated by the carbonization furnace rotating shaft 12. The first drying processing unit 20X includes a first cylindrical drying furnace 21X having at least an inner bottom surface formed into an arcuate surface, a first drying furnace rotating shaft 22X arranged inside the first drying furnace of the first cylindrical drying furnace 21X, a first drying furnace motor 23X that rotates the first drying furnace rotating shaft 22X, and a first drying furnace tilted blade 24X that is rotated by the first drying furnace motor 23X. The second drying processing section 20Y includes a second cylindrical drying furnace 21Y having at least the inner bottom surface formed into an arcuate surface, a second drying furnace rotating shaft 22Y arranged inside the second drying furnace of the second cylindrical drying furnace 21Y, a second drying furnace electric motor 23Y that drives the second drying furnace rotating shaft 22Y, and a second drying furnace inclined blade 24Y that rotates by the second drying furnace electric motor 23Y.

[0046] One end of the first drying furnace of the first drying processing unit 20X includes a steam exhaust section 26 that exhausts superheated steam and an organic matter supply section 25 that supplies organic matter into the first drying furnace. The steam exhaust section 26 includes a draft space 26a connected to one end of the first drying furnace, a steam exhaust stack 26b connected to the top of the draft space 26a, and a valve 26c that changes the passage area of ​​the steam exhaust stack 26b. The valve 26c adjusts the amount of superheated steam naturally exhausted from the steam exhaust stack 26b so as not to exhaust superheated steam from the organic matter supply section 25. The draft space 26a can also enhance the flow of natural exhaust. In this way, by adjusting the amount of naturally exhausted superheated steam with the valve 26c and not exhausting superheated steam from the supply section, condensation of the organic matter supplied from the organic matter supply section 25 can be prevented.

[0047] Organic matter supplied from one end of the first cylindrical drying furnace 21X to the interior of the first drying furnace is discharged from the other end of the first cylindrical drying furnace 21X by the rotating tilted blades for the first drying furnace 24X. Organic matter discharged from the other end of the first drying furnace is supplied from one end of the second drying furnace to the interior of the second drying furnace. Organic matter supplied to the interior of the second drying furnace is discharged from the other end of the second cylindrical drying furnace 21Y by the rotating tilted blades for the second drying furnace 24Y. Organic matter discharged from the other end of the second drying furnace is supplied from one end of the carbonization unit 10 to the interior of the carbonization furnace. Organic matter supplied from one end of the cylindrical carbonization furnace 11 to the interior of the carbonization furnace is discharged from the other end of the cylindrical carbonization furnace 11 by the rotating tilted blades for the carbonization furnace 14. An outlet 15 is formed at the bottom of the other end of the cylindrical carbonization furnace 11.

[0048] Superheated steam at 300°C or higher generated by the superheated steam generator 30 is supplied to the carbonization treatment unit 10. The superheated steam supplied to the carbonization treatment unit 10 is supplied from one end of the carbonization furnace to the second cylindrical drying furnace 21Y. The superheated steam supplied into the carbonization furnace is discharged from one end of the carbonization furnace at 120°C or higher. The superheated steam supplied from the other end of the second cylindrical drying furnace 21Y to the inside of the second drying furnace is supplied from the other end of the first drying furnace to the inside of the first drying furnace. The superheated steam supplied into the inside of the first drying furnace is naturally exhausted from the steam exhaust unit 26 at one end of the first drying furnace. As shown in Figure 2, no fan or the like is provided to forcibly exhaust the superheated steam.

[0049] As shown in this embodiment, the organic matter can be efficiently carbonized by flowing superheated steam in the direction in which the organic matter is supplied inside the carbonization furnace of the carbonization processing unit 10, inside the first drying furnace of the first drying processing unit 20X, and inside the second drying furnace of the second drying processing unit 20Y.

[0050] In the carbonization treatment apparatus shown in this embodiment, it is preferable to perform treatment by setting the rotation speed of the second drying oven motor 23Y faster than that of the carbonization oven motor 13, and setting the rotation speed of the first drying oven motor 23X faster than that of the second drying oven motor 23Y. Because the weight loss rate of organic matter is greater in the second drying processor 20Y than in the carbonization processor 10, and greater in the first drying processor 20X than that of the second drying processor 20Y, treatment efficiency can be improved by setting the rotation speed of the second drying oven motor 23Y faster than that of the carbonization oven motor 13, and by setting the rotation speed of the first drying oven motor 23X faster than that of the second drying oven motor 23Y.

[0051] In the carbonization treatment device shown in this embodiment, it is preferable that the organic matter supplied to the inside of the first drying furnace is powdered dried sludge obtained by drying dewatered sludge, which can improve the efficiency of the carbonization treatment.

[0052] Furthermore, in the carbonization treatment apparatus shown in this embodiment, it is preferable to perform treatment with the inside of the carbonization furnace set to 300° C. or higher, the inside of the second drying furnace set to 170° C. or higher, and the inside of the first drying furnace set to 120° C. or higher. In this way, by setting the inside of the carbonization furnace to 300° C. or higher, the carbonization treatment can be carried out reliably, by setting the inside of the second drying furnace to 170° C. or higher, the drying efficiency can be improved by taking advantage of the properties of superheated steam, and by setting the inside of the first drying furnace to 120° C. or higher, the drying efficiency can be improved.

[0053] In the carbonization treatment apparatus shown in this embodiment, the volume ratio of the organic matter remaining in the first drying furnace to the total volume of the first drying furnace is set to 25% or less, thereby promoting the flow of superheated steam and ensuring sufficient contact between the superheated steam and the organic matter, thereby enabling effective drying and carbonization using superheated steam. It is preferable to set the volume ratio of the organic matter remaining in the first drying furnace to the total volume of the first drying furnace to 5% or less, the volume ratio of the organic matter remaining in the second drying furnace to the total volume of the second drying furnace to 10% or less, and the volume ratio of the organic matter remaining in the carbonization furnace to the total volume of the carbonization furnace to 10% or less. The efficiency of the carbonization treatment can be improved by setting the moisture content of the organic matter supplied to the carbonization furnace to 10% or less, preferably 6% or less.

[0054] Figure 3 shows the inclined blades for the carbonization furnace described in Figures 1 and 2, with Figure 3(a) being a top view of the main parts of the carbonization processing section, and Figure 3(b) being a side cross-sectional view of the carbonization processing section. The inclined blades for the drying furnace 24 described in Figure 1 and the inclined blades for the first drying furnace 24X and the inclined blades for the second drying furnace 24Y described in Figure 2 have the same configuration as the inclined blades for the carbonization furnace 14 described in Figure 3, so their description will be omitted. The inclined blades for the drying furnace 24, the inclined blades for the first drying furnace 24X, and the inclined blades for the second drying furnace 24Y correspond to the inclined blades for the carbonization furnace 14, 14A, 14B, and 14C, respectively, and the blade connecting piece for the carbonization furnace corresponds to the blade connecting piece for the carbonization furnace 16. In Figure 3, arrow M indicates the rotation direction of the carbonization furnace rotating shaft 12, and arrow L indicates the movement direction of the organic matter.

[0055] The inclined vanes 14 for the carbonization furnace have an inclination angle α ranging from 30 to 60 degrees with respect to the axial direction 12s of the carbonization furnace rotating shaft 12. The inclination angle α of the inclined vanes 14 for the carbonization furnace is preferably in the range of 40 to 50 degrees, and is set to 45 degrees in this embodiment. If the inclination angle α is less than 30 degrees, organic matter tends to adhere to the inclined vanes 14 for the carbonization furnace. If the inclination angle α exceeds 60 degrees, organic matter will remain between adjacent inclined vanes 14. If the spacing between adjacent inclined vanes 14 is narrowed to prevent organic matter from remaining between adjacent inclined vanes 14, the number of inclined vanes 14 increases, which increases the vane volume. This impairs the flow of superheated steam and reduces the heat of the superheated steam, resulting in reduced carbonization efficiency. By setting the inclination angle α of the inclined blades 14 for the carbonization furnace in the range of 30 degrees to 60 degrees, or even in the range of 40 degrees to 50 degrees, it is possible to reduce adhesion of organic matter to the inclined blades 14 for the carbonization furnace and to allow superheated steam to flow efficiently.

[0056] 3(a), the multiple inclined vanes 14 for the carbonization furnace are arranged at a predetermined pitch T in the longitudinal direction of the carbonization furnace rotating shaft 12, and adjacent inclined vanes 14 for the carbonization furnace are arranged in different radial directions 12r with respect to the carbonization furnace rotating shaft 12. By arranging the multiple inclined vanes 14 for the carbonization furnace in this manner, organic matter can be efficiently moved with a small number of inclined vanes 14, and superheated steam can be efficiently circulated.

[0057] The longitudinal blade length 14H of the carbonization furnace rotating shaft 12 of the carbonization furnace inclined blades 14 is longer than the predetermined pitch T. By making the longitudinal blade length 14H longer than the predetermined pitch T, the front end 14Bf of the adjacent carbonization furnace inclined blade 14B located downstream is located upstream of the rear end 14Ar of the carbonization furnace inclined blade 14A located upstream, so that organic matter does not remain between adjacent carbonization furnace inclined blades 14.

[0058] When the carbonization furnace inclined blades 14 are arranged in the order of carbonization furnace inclined blades 14A, 14B, and 14C from the upstream side in the direction of movement of the organic matter, the carbonization furnace inclined blade 14B is disposed in a radial direction 12r that is offset by 120 degrees from the carbonization furnace inclined blade 14A in the counter-rotation direction of the carbonization furnace rotating shaft 12, and the carbonization furnace inclined blade 14C is disposed in a radial direction 12r that is offset by 120 degrees from the carbonization furnace inclined blade 14B in the counter-rotation direction of the carbonization furnace rotating shaft 12. In this way, by sequentially offsetting the respective carbonization furnace inclined blades 14 by 120 degrees in the counter-rotation direction of the carbonization furnace rotating shaft 12, organic matter can be efficiently moved with a small number of carbonization furnace inclined blades 14 and superheated steam can be efficiently flowed.

[0059] Figure 4 is a perspective view showing the inclined vane for the carbonization furnace, taken from a different direction than Figures 4(a) and 4(b). The inclined vane for the carbonization furnace 14 is attached to the tip of the vane connecting piece 16 for the carbonization furnace, which extends from the rotating shaft 12 for the carbonization furnace in the radial direction 12r of the rotating shaft 12 for the carbonization furnace. The radial vane length 14j of the inclined vane for the carbonization furnace 14 is smaller than the radial connecting piece length 16j of the vane connecting piece 16 for the carbonization furnace, and the vane width 14k of the inclined vane for the carbonization furnace 14 is larger than the connecting piece width 16k of the vane connecting piece 16 for the carbonization furnace. This allows for efficient movement of organic matter and efficient flow of superheated steam.

[0060] According to the present invention, organic matter can be carbonized using superheated steam as a heat source.

[0061] 10 Carbonization processing section 11 Cylindrical carbonization furnace 12 Rotating shaft for carbonization furnace 12r Radial direction 12s Axial direction 13 Electric motor for carbonization furnace 14, 14A, 14B, 14C Inclined blade for carbonization furnace 14Ar Rear end 14Bf Front end 14j Radial blade length 14k Blade width 14H Longitudinal blade length 15 Discharge outlet 16 Blade connection piece for carbonization furnace 16j Radial connection piece length 16k Connection piece width 20 Drying processing section 20X First drying processing section 20Y Second drying processing section 21 Cylindrical drying furnace 21X First cylindrical drying furnace 21Y Second cylindrical drying furnace 22 Rotating shaft for drying furnace 22X Rotating shaft for first drying furnace 22Y Rotating shaft for second drying furnace 23 Electric motor for drying furnace 23X First drying oven motor 23Y Second drying oven motor 24 Drying oven tilt blade 24X First drying oven tilt blade 24Y Second drying oven tilt blade 25 Organic matter supply section 26 Steam exhaust section 26a Draft space 26b Steam exhaust stack 26c Valve 30 Superheated steam generator T Predetermined pitch α Tilt angle

Claims

1. A carbonization treatment device that carbonizes organic matter using superheated steam, wherein the carbonization treatment section comprises a cylindrical carbonization furnace having at least an inner bottom surface formed into an arc-shaped surface, a rotating shaft for the carbonization furnace arranged inside the cylindrical carbonization furnace, a motor for the carbonization furnace that rotates and drives the rotating shaft for the carbonization furnace, and an inclined blade for the carbonization furnace that is rotated by the rotating shaft for the carbonization furnace, wherein the organic matter supplied from one end of the cylindrical carbonization furnace to the inside of the carbonization furnace is discharged from the other end of the cylindrical carbonization furnace by the rotating inclined blade for the carbonization furnace, superheated steam of 300°C or higher is supplied to the inside of the carbonization furnace, and the superheated steam supplied to the inside of the carbonization furnace is discharged from one end of the carbonization furnace at 120°C or higher.

2. The carbonization treatment device according to claim 1, characterized in that the inclined blades for the carbonization furnace are inclined at an angle ranging from 30 degrees to 60 degrees with respect to the axial direction of the rotating shaft for the carbonization furnace.

3. The carbonization treatment device according to claim 1, characterized in that a plurality of the inclined blades for the carbonization furnace are arranged at a predetermined pitch in the longitudinal direction of the rotating shaft for the carbonization furnace, and adjacent inclined blades for the carbonization furnace are arranged in different radial directions relative to the rotating shaft for the carbonization furnace.

4. The carbonization treatment device according to claim 3, characterized in that the blade length of the inclined blades for the carbonization furnace in the longitudinal direction of the rotating shaft for the carbonization furnace is longer than the predetermined pitch.

5. The carbonization treatment device described in claim 3, characterized in that when the inclined blades for the carbonization furnace are arranged in the order of an inclined blade A for the carbonization furnace, an inclined blade B for the carbonization furnace, and an inclined blade C for the carbonization furnace from the upstream side in the direction of movement of the organic matter, the inclined blade B for the carbonization furnace is arranged in the radial direction shifted by 120 degrees in the counter-rotation direction of the rotating shaft for the carbonization furnace relative to the inclined blade A for the carbonization furnace, and the inclined blade C for the carbonization furnace is arranged in the radial direction shifted by 120 degrees in the counter-rotation direction of the rotating shaft for the carbonization furnace relative to the inclined blade B for the carbonization furnace.

6. The carbonization processing device described in claim 1, characterized in that the inclined blade for the carbonization furnace is attached to the tip of a blade connection piece for the carbonization furnace extending radially from the rotating shaft for the carbonization furnace, the radial blade length of the inclined blade for the carbonization furnace is smaller than the radial connection piece length of the blade connection piece for the carbonization furnace, and the blade width of the inclined blade for the carbonization furnace is larger than the connection piece width of the blade connection piece for the carbonization furnace.

7. A carbonization treatment device as described in claim 1, further comprising a drying treatment section for drying the organic matter supplied to the carbonization treatment section, the drying treatment section comprising: a cylindrical drying furnace having at least an inner bottom surface formed into an arcuate surface; a drying furnace rotating shaft arranged inside the cylindrical drying furnace; a drying furnace motor for rotating the drying furnace rotating shaft; and a drying furnace inclined blade rotated by the drying furnace rotating shaft, the organic matter supplied from one end of the cylindrical drying furnace to the inside of the drying furnace is discharged from the other end of the cylindrical drying furnace by the rotating drying furnace inclined blade, the organic matter discharged from the other end of the drying furnace is supplied from one end of the carbonization furnace to the inside of the carbonization furnace, the superheated steam discharged from one end of the carbonization furnace is supplied from the other end of the drying furnace to the inside of the drying furnace, and the superheated steam supplied to the inside of the drying furnace is discharged from one end of the drying furnace.

8. The carbonization treatment device according to claim 7, characterized in that the inclined blades for the drying furnace are inclined at an angle ranging from 30 degrees to 60 degrees with respect to the axial direction of the rotation shaft for the drying furnace.

9. The carbonization treatment device according to claim 7, characterized in that the multiple inclined blades for the drying oven are arranged at a predetermined pitch in the longitudinal direction of the rotating shaft for the drying oven, and adjacent inclined blades for the drying oven are arranged in different radial directions with respect to the rotating shaft for the drying oven.

10. The carbonization processing apparatus according to claim 9, characterized in that the blade length in the longitudinal direction of the drying furnace rotation shaft of the drying furnace inclined blade is longer than the predetermined pitch.

11. The carbonization treatment device described in claim 9, characterized in that when the drying oven inclined blades are arranged in the order of a drying oven inclined blade A, a drying oven inclined blade B, and a drying oven inclined blade C from the upstream side in the direction of movement of the organic matter, the drying oven inclined blade B is arranged in the radial direction shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft relative to the drying oven inclined blade A, and the drying oven inclined blade C is arranged in the radial direction shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft relative to the drying oven inclined blade B.

12. The carbonization treatment device according to claim 7, characterized in that the superheated steam discharged from one end of the drying furnace is set to 120°C or higher.

13. The carbonization treatment device according to claim 7, characterized in that one end of the drying furnace has a steam exhaust section which exhausts the superheated steam, and an organic matter supply section which supplies the organic matter into the interior of the drying furnace, the steam exhaust section having a draft space connected to the one end of the drying furnace, a steam exhaust tube connected to an upper part of the draft space, and a valve which changes the passage area of ​​the steam exhaust tube, and by adjusting the amount of superheated steam naturally exhausted from the steam exhaust tube by the valve, the superheated steam is not exhausted from the organic matter supply section.

14. The carbonization treatment device described in claim 7, characterized in that the inclined blade for the drying oven is attached to the tip of a blade connection piece for the drying oven extending radially from the rotating shaft for the drying oven, the radial blade length of the inclined blade for the drying oven is made smaller than the radial connection piece length of the blade connection piece for the drying oven, and the blade width of the inclined blade for the drying oven is made larger than the connection piece width of the blade connection piece for the drying oven.

15. A drying processing section for drying the organic matter to be supplied to the carbonization processing section, the drying processing section comprising a first drying processing section and a second drying processing section, the first drying processing section comprising: a first cylindrical drying oven having at least an inner bottom surface formed into an arcuate surface; a first drying oven rotating shaft arranged inside the first drying oven of the first cylindrical drying oven; a first drying oven motor for driving and rotating the first drying oven rotating shaft; and a first drying oven inclined blade rotated by the first drying oven rotating shaft; the second drying processing section comprising: a second cylindrical drying oven having at least an inner bottom surface formed into an arcuate surface; a second drying oven rotating shaft arranged inside the second drying oven of the second cylindrical drying oven; a second drying oven motor for driving and rotating the second drying oven rotating shaft; and a second drying oven inclined blade rotated by the second drying oven rotating shaft; the organic matter supplied from one end of a first drying oven to the inside of the first drying oven is discharged from the other end of the first drying oven by the rotating tilted blade for the first drying oven; the organic matter discharged from the other end of the first drying oven is supplied from one end of the second drying oven to the inside of the second drying oven; the organic matter supplied to the inside of the second drying oven is discharged from the other end of the second drying oven of the second cylindrical drying oven by the rotating tilted blade for the second drying oven; the organic matter discharged from the other end of the second drying oven is supplied from one end of the carbonization oven to the inside of the carbonization oven; the superheated steam discharged from the one end of the carbonization oven is supplied from the other end of the second drying oven to the inside of the second drying oven; the superheated steam supplied to the inside of the second drying oven is supplied from the other end of the first drying oven to the inside of the first drying oven; and the superheated steam supplied to the inside of the first drying oven is discharged from the one end of the first drying oven.

16. The carbonization treatment device according to claim 15, characterized in that the inclined blade for the first drying oven has an inclination angle in the range of 30 degrees to 60 degrees with respect to the axial direction of the rotating shaft for the first drying oven, and the inclined blade for the second drying oven has an inclination angle in the range of 30 degrees to 60 degrees with respect to the axial direction of the rotating shaft for the second drying oven.

17. The carbonization treatment device described in claim 15, characterized in that a plurality of the first drying oven inclined blades are arranged at a predetermined pitch in the longitudinal direction of the first drying oven rotating shaft, and adjacent first drying oven inclined blades are arranged in different radial directions with respect to the first drying oven rotating shaft, and a plurality of the second drying oven inclined blades are arranged at a predetermined pitch in the longitudinal direction of the second drying oven rotating shaft, and adjacent second drying oven inclined blades are arranged in different radial directions with respect to the second drying oven rotating shaft.

18. The carbonization treatment device described in claim 17, characterized in that the longitudinal blade length of the rotating shaft for the first drying furnace of the inclined blade for the first drying furnace is longer than the specified pitch, and the longitudinal blade length of the rotating shaft for the second drying furnace of the inclined blade for the second drying furnace is longer than the specified pitch.

19. When the first drying oven inclined blade A, the first drying oven inclined blade B, and the first drying oven inclined blade C are arranged in this order from the upstream side in the movement direction of the organic matter as the first drying oven inclined blade, the first drying oven inclined blade B is arranged in the radial direction shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft relative to the first drying oven inclined blade A, and the first drying oven inclined blade C is arranged in the radial direction shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft relative to the first drying oven inclined blade B; when the second drying oven inclined blade A, the second drying oven inclined blade B, and the second drying oven inclined blade C are arranged in this order from the upstream side in the movement direction of the organic matter as the second drying oven inclined blade, the second drying oven inclined blade B is arranged in the radial direction shifted by 120 degrees in the counter-rotation direction of the drying oven rotating shaft; The carbonization treatment device according to claim 17, characterized in that the second drying furnace inclined blade C is disposed in the radial direction shifted by 120 degrees from the second drying furnace inclined blade B in the counter-rotation direction of the drying furnace rotation shaft.

20. The carbonization treatment apparatus according to claim 15, characterized in that the superheated steam discharged from one end of the first drying furnace is set to 120°C or higher.

21. The carbonization treatment device according to claim 15, characterized in that one end of the first drying furnace has a steam exhaust section which exhausts the superheated steam, and an organic matter supply section which supplies the organic matter into the interior of the drying furnace, the steam exhaust section having a draft space connected to one end of the drying furnace, a steam exhaust tube connected to an upper part of the draft space, and a valve which changes the passage area of ​​the steam exhaust tube, and by adjusting the amount of superheated steam naturally exhausted from the steam exhaust tube by the valve, the superheated steam is not exhausted from the organic matter supply section.

22. The carbonization treatment device described in claim 15, characterized in that the first drying oven inclined blade is attached to the tip of a first drying oven blade connecting piece extending radially from the first drying oven rotating shaft to the first drying oven rotating shaft, the radial blade length of the first drying oven inclined blade is smaller than the radial connecting piece length of the first drying oven blade connecting piece, and the blade width of the first drying oven inclined blade is larger than the connecting piece width of the first drying oven blade connecting piece, and the second drying oven inclined blade is attached to the tip of a second drying oven blade connecting piece extending radially from the second drying oven rotating shaft to the second drying oven rotating shaft, the radial blade length of the second drying oven inclined blade is smaller than the radial connecting piece length of the second drying oven blade connecting piece, and the blade width of the second drying oven inclined blade is larger than the connecting piece width of the second drying oven blade connecting piece.

23. A carbonization method using a carbonization treatment device according to any one of claims 1 to 22, characterized in that the moisture content of the organic matter supplied to the carbonization furnace is set to 10% or less.

24. A carbonization method using a carbonization treatment device according to any one of claims 7 to 14, characterized in that the rotation speed of the motor for the drying furnace is made faster than that of the motor for the carbonization furnace.

25. A carbonization treatment method using a carbonization treatment device described in any one of claims 15 to 22, characterized in that the rotation speed of the motor for the second drying oven is made faster than that of the motor for the carbonization oven, and the rotation speed of the motor for the first drying oven is made faster than that of the motor for the second drying oven.

26. A carbonization treatment method using a carbonization treatment device as defined in any one of claims 15 to 22, characterized in that the organic matter supplied to the inside of the first drying furnace is powdered dried sludge obtained by drying dewatered sludge.

27. A carbonization method using a carbonization treatment device described in any one of claims 15 to 22, characterized in that the inside of the carbonization furnace is set to 300°C or higher, the inside of the second drying furnace is set to 170°C or higher, and the inside of the first drying furnace is set to 120°C or higher.

28. A carbonization method using a carbonization treatment device as defined in any one of claims 15 to 22, characterized in that the volume ratio of the organic matter remaining inside the first drying furnace to the volume inside the first drying furnace is set to 25% or less.

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