Carbonization device and treatment method

Abstract

To control running cost concerning carbonization treatment in a carbonization furnace.SOLUTION: A carbonization device includes: an introduction part for matter to be burned; a carbonization furnace for heating the matter to be burned introduced from the introduction part to produce burned matter and dry distillation gas; a heating part which heats the matter to be burned introduced into the carbonization furnace; a gas combustion part which combusts the dry distillation gas produced from the heated matter to be burned; and heating tubes which extend into an internal space of the carbonization furnace and through which heat produced from the combusted dry distillation gas in the gas combustion part is introduced into the carbonization furnace.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a carbonization device and a processing method.

Background Art

[0002] Conventionally, a carbonization device equipped with a carbonization furnace and configured to carbonize objects such as household waste has been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a carbonization device, suppressing the running cost related to heating for carbonizing an object introduced into the furnace is an issue. One aspect of the present disclosure is to suppress the running cost related to the carbonization process in the carbonization furnace.

Means for Solving the Problems

[0005] An embodiment of the disclosure is exemplified as a carbonization device. This carbonization device includes an introduction part for combustion products, a carbonization furnace that heats the combustion products introduced from the introduction part to generate carbide and pyrolysis gas, a heating part that heats the combustion products introduced into the carbonization furnace, a gas combustion part that burns the pyrolysis gas generated from the heated combustion products, and a heating pipe that extends within the internal space of the heating furnace and introduces the heat generated from the pyrolysis gas burned in the gas combustion part into the carbonization furnace.

[0006] Another embodiment of the disclosure is exemplified as a processing method. The carbonization device includes a carbonization furnace that heats the introduced combustion material and generates carbonized material and pyrolysis gas, and executes a process of heating the combustion material introduced into the carbonization furnace, a process of burning the pyrolysis gas generated from the heated combustion material, and a process of introducing heat generated from the burned pyrolysis gas into the carbonization furnace through a heating tube extending in the internal space of the carbonization furnace. Effect of the Invention

[0007] According to the disclosed embodiments, the running costs associated with the carbonization process in the carbonization furnace are reduced. [Brief description of the drawings]

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

[0009] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The configurations of the following embodiments are merely examples, and the configuration of the carbonization device disclosed in the present embodiment may be appropriately changed depending on the processing capacity, etc. The configurations disclosed in the present embodiment are not intended to limit the technical scope of the invention to only those configurations unless otherwise specified, and can be combined as much as possible.

[0010] In addition, the drawings referred to in the following description only schematically show the shape, size, and positional relationship to the extent that the content of the present invention can be understood. That is, the present invention is not limited only to the shape, size, and positional relationship illustrated in each figure. Also, there may be parts where the dimensional relationships and ratios between the drawings are different from each other.

[0011] 〔Embodiment 1〕 First, referring to FIGS. 1 to 2, the carbonization device 1 according to Embodiment 1 will be described. FIG. 1 is a diagram showing an example of the schematic configuration of the carbonization device 1 according to Embodiment 1. In FIG. 1, a front view of the entire carbonization device 1 as viewed from the front is shown. FIG. 2 is a side view of the carbonization furnace 2 included in the carbonization device 1 (for example, as viewed from the right side toward the paper surface of FIG. 1). The carbonization device 1 according to Embodiment 1 is, for example, an example of a suitable form for an incineration facility that processes carbonization targets such as household waste in local governments and the like. The carbonization targets may include, for example, waste wood chips, waste plastics, resin materials, sewage sludge containing carbon, paper sludge, and the like. The carbonization target is an example of a "combustible material".

[0012] The carbonization device 1 according to Embodiment 1 includes a carbonization furnace 2, heating pipes (6a, 6b, 7a, 7b, 8), dry distillation gas ducts (9a, 9b, 10a, 10b), a heating unit 3, a discharge mechanism 5, and gas combustion units (13, 14). Further, the carbonization device 1 according to Embodiment 1 includes a temperature adjustment chamber 15, an exhaust gas cooler 19, an exhaust gas collecting duct 18, an exhaust pipe 21, and temperature sensors T1 to T9.

[0013] The carbonization furnace 2 is a unit for carbonizing the carbonization target Z1 introduced into the furnace. A temperature sensor T1 is provided in the carbonization furnace 2 to detect the temperature during the carbonization process of the carbonization target Z1. An opening / closing door for introducing the carbonization target Z1 into the furnace is provided above the carbonization furnace 2. A heating unit 3 for heating the carbonization target Z1 introduced into the furnace is provided below the carbonization furnace 2. The heating unit 3 includes a combustion mechanism (4a, 4b) for burning the fuel supplied from the outside within the heating unit 3. The combustion mechanism (4a, 4b) is, for example, a burner that burns the supplied fuel. However, the combustion mechanism (4a, 4b) may be a burner or the like having an ignition plug for igniting the supplied fuel, an intake hole for taking in air during combustion, and the like. In Embodiment 1, the combustion mechanism (4a, 4b) is provided, for example, on each side wall facing the longitudinal direction of the carbonization furnace 2.

[0014] A discharge mechanism 5 for discharging the carbide produced by the carbonization process is provided at the bottom of the carbonization furnace 2. The discharge mechanism 5 includes a cylindrical body extending in the longitudinal direction within the carbonization furnace 2, a spiral blade member formed on the cylindrical surface of the cylindrical body, and a rotating shaft 5a that pivotally supports the cylindrical body. The rotating shaft 5a of the discharge mechanism 5 is connected to a motor M1 that is a rotation mechanism and is configured to be rotatable within the carbonization furnace 2. As shown in FIG. 2, at the bottom of the carbonization furnace 2, the discharge mechanism 5 is configured to be located at a substantially central portion in the depth direction from the front side toward the back side.

[0015] As shown in FIGS. 1 to 2, the carbonization furnace 2 includes one or more heating tubes (6a, 6b, 7a, 7b, 8) extending within the internal space. As will be described later, each heating tube functions as a heat pipe for introducing the heat generated from the pyrolysis gas Z3 burned in the gas combustion units (13, 14) into the carbonization furnace 2. Each heating tube extends within the internal space of the carbonization furnace 2 from one side wall facing the longitudinal direction (the left-right direction with respect to the paper surface in FIG. 1) to the other side wall. One One end is connected to the heat flow supply duct 17 provided outside through a through hole provided in one side wall, and the other end is connected to the exhaust gas collecting duct 18 through a through hole provided in the other side wall. A temperature sensor T2 is provided in the heat flow supply duct 17 to detect the temperature of the heat flow introduced into the carbonization furnace 2 through each heating tube. Further, a temperature sensor T3 is provided in the exhaust gas collecting duct 18 to detect the temperature of the exhaust gas after being introduced into the carbonization furnace 2 through each heating tube.

[0016] In the carbonization furnace 2, the heating tubes (6a, 6b) are arranged on the upper side where the opening and closing door is provided, and the heating tube 8 is arranged on the bottom side where the discharge mechanism 5 is provided. Further, the heating tubes (7a, 7b) are arranged between the heating tubes (6a, 6b) and the heating tube 8 in the vertical direction in the carbonization furnace 2. As shown in FIG. 2, each of the heating tubes 6a, 6b, 8 is arranged so as to form the apex of a substantially triangle in side view. Each of the heating tubes 7a, 7b is arranged on the side of a substantially triangle having as its sides the line segment formed by the heating tubes 6a and 8 and the line segment formed by the heating tubes 6b and 8.

[0017] To each opening of the opposing side walls in the longitudinal direction of the carbonization furnace 2, dry distillation gas ducts (9a, 9b), (10a, 10b) for introducing the dry distillation gas Z3 generated from the heated carbonization object Z1 into the gas combustion parts (13, 14) are connected. One end of the dry distillation gas ducts (9a, 9b) is connected to the other end of the connecting pipe 11 connected to the gas combustion part 13, and one end of the dry distillation gas ducts (10a, 10b) is connected to the other end of the connecting pipe 12 connected to the gas combustion part 14. A temperature sensor T8 is provided in the connecting pipe 11 to detect the temperature of the dry distillation gas Z3 introduced into the gas combustion part 13 through the dry distillation gas ducts (9a, 9b). Further, a temperature sensor T9 is provided in the connecting pipe 12 to detect the temperature of the dry distillation gas Z3 introduced into the gas combustion part 14 through the dry distillation gas ducts (10a, 10b).

[0018] The pyrolysis gas Z3 generated from the object Z1 to be carbonized flows into the pyrolysis gas ducts (9a, 9b), (10a, 10b) through, for example, two openings provided on each side wall. As shown in FIG. 2, the pyrolysis gas ducts (9a, 9b), (10a, 10b) are arranged at a height position between the opening / closing door provided above the carbonization furnace 2 and the heating pipes (6a, 6b) provided on the upper side in the vertical direction.

[0019] The gas combustion parts (13, 14) include combustion mechanisms (13a, 14a) for burning the pyrolysis gas Z3 introduced through the pyrolysis gas ducts (9a, 9b), (10a, 10b) provided on the side walls of the carbonization furnace 2. A temperature sensor T5 is provided in the gas combustion part 13 to detect the temperature during the combustion of the pyrolysis gas Z3 introduced through the pyrolysis gas ducts (9a, 9b). Similarly, a temperature sensor T6 is provided in the gas combustion part 14 to detect the temperature during the combustion of the pyrolysis gas Z3 introduced through the pyrolysis gas ducts (10a, 10b).

[0020] The combustion mechanisms (13a, 14a) are the same as the combustion mechanism 4a etc. provided in the heating part 3, and are gas burners for burning the supplied pyrolysis gas Z3. However, the combustion mechanisms (4a, 4b) may be burners etc. having an ignition plug for igniting the supplied pyrolysis gas Z3, intake holes for taking in air during combustion, etc. The gas combustion parts (13, 14) are connected to the temperature adjustment chamber 15 through connection pipes, and the pyrolysis gas Z3 burned in the gas combustion parts (13, 14) is introduced into the temperature adjustment chamber 15 through the connection pipes as, for example, heat flows (Z6, Z7).

[0021] The temperature adjustment chamber 15 is a unit for adjusting at least one of the temperature or pressure of the pyrolysis gas Z3 (heat flows Z6, Z7) burned by the gas combustion parts (13, 14). A temperature sensor T7 is provided in the temperature adjustment chamber 15 to adjust the temperature of the heat flows (Z6, Z7) flowing in through the connection pipes. The heat flow Z8 whose temperature or pressure has been appropriately adjusted in the temperature adjustment chamber 15 is supplied to a heat flow supply duct 17 connected to the other end of a connection pipe 16 whose one end is connected to the gas combustion part 13. The heat flow Z8 is supplied to a heat flow supply duct 17 connected to the other end of a connection pipe 16 whose one end is connected to the gas combustion part 13.

[0022] In addition, the other end of the bypass pipe 22, one end of which is connected to the pressure regulating valve 23, is connected to the temperature adjustment chamber 15. The pressure regulating valve 23 and the bypass pipe 22 function as a pressure regulating mechanism for adjusting the internal pressure of the gas combustion parts (13, 14) when the dry distillation gas Z3 is burned. The pressure regulating valve 23 has, for example, a pressure sensor, and the internal pressure of the gas combustion parts (13, 14) when the dry distillation gas Z3 is burned is adjusted by controlling the opening / closing and the opening degree of the valve based on the pressure value detected by this pressure sensor. The outlet of the pressure regulating valve 23 is connected to an exhaust gas cooler 19 such as a gas cooler.

[0023] (Flow of carbonization process) When the opening / closing door provided at the upper part of the carbonization furnace 2 is opened and the object to be carbonized Z1 is introduced into the furnace, the opening / closing door closes, and heating of the heating part 3 is started by the combustion flame (burner flame) Z2 of the fuel burned in the heating part 3. When the heating by the heating part 3 starts, the temperature inside the furnace rises, and the object to be carbonized Z1 accommodated in the furnace is heated. As the heating progresses, dry distillation gas Z3 is generated from the heated object to be carbonized Z1 and flows into the dry distillation gas ducts (9a, 9b), (10a, 10b) provided at the upper sides of the respective side walls facing each other in the longitudinal direction through two openings.

[0024] The dry distillation gas Z3 that has flowed into the dry distillation gas duct (9a, 9b) is introduced into the gas combustion part 13 through the connection pipe 11, and the dry distillation gas Z3 that has flowed into the dry distillation gas duct (10a, 10b) is introduced into the gas combustion part 14 through the connection pipe 12. Based on the temperatures detected by the temperature sensors T1, T8, and T5, ignition is performed by the combustion mechanism 13a, and combustion (Z4) of the dry distillation gas Z3 introduced into the gas combustion part 13 is started. Similarly, based on the temperatures detected by the temperature sensors T1, T9, and T6, ignition is performed by the combustion mechanism 14a, and combustion (Z4) of the dry distillation gas Z3 introduced into the gas combustion part 14 is started. With the combustion of the dry distillation gas Z3, the temperature inside the gas combustion parts (13, 14) rises, and the heat generated by the combustion is introduced into the temperature adjustment chamber 15 as heat flows Z6 and Z7 through the connection pipes.

[0025] The heat fluxes Z6 and Z7 introduced into the temperature adjustment chamber 15 are adjusted to a heat flux Z8 at an appropriate temperature according to the carbonization state, for example, based on the temperatures detected by the temperature sensors T1 to T9. The heat flux Z8 whose temperature is adjusted by the temperature adjustment chamber 15 is supplied to the heat flux supply duct 17 through the connection pipe 16. Also, the internal pressure of the gas combustion parts (13, 14) that burn the dry distillation gas Z3 is adjusted by a pressure adjustment mechanism composed of a bypass pipe 22 and a pressure adjustment valve 23 connected to the temperature adjustment chamber 15. The internal pressure of the gas combustion parts (13, 14) is adjusted to an appropriate pressure according to the carbonization state, for example, based on the temperature detected by the temperature sensors T1 to T9 or the pressure value detected by a pressure sensor provided in the pressure adjustment mechanism.

[0026] The heat flux Z8 supplied to the heat flux supply duct 17 is introduced into the heating pipes (6a, 6b, 7a, 7b, 8) that extend through the internal space of the carbonization furnace 2. The internal space of the carbonization furnace 2 and the carbonization object Z1 accommodated in the carbonization furnace 2 are heated by the heat flux Z8 introduced into each heating pipe that extends through the internal space. By heating with the heat flux Z8 introduced into each heating pipe, the processing step for the carbonization object Z1 accommodated in the furnace can be relatively advanced.

[0027] The heat flux Z8 introduced into the heating pipes (6a, 6b, 7a, 7b, 8) is sent to the exhaust gas cooler 19 through the exhaust gas collection duct 18. The exhaust gas cooler 19 cools the exhaust gas sent from the exhaust gas collection duct 18 to a temperature suitable for exhaust, for example, based on the temperature detected by the temperature sensor T4 provided in the exhaust pipe 21. The exhaust gas cooled to a temperature suitable for exhaust is exhausted to the outside through the exhaust pipe 21.

[0028] By the carbonization process of the carbonization device 1, the carbide Z9 generated from the carbonization object Z1 is discharged to the discharge mechanism 5 provided at the bottom of the carbonization furnace 2 as shown by the dashed arrow. The carbide Z9 discharged to the discharge mechanism 5 is subjected to the rotational drive of the motor M1 connected to the rotating shaft 5a and is carried out to the carbide discharge port 24 through the discharge pipe connected to the discharge mechanism 5.

[0029] As described above, the carbonization apparatus 1 according to Embodiment 1 includes a carbonization furnace 2 that heats the carbonization object Z1 introduced into the furnace to generate carbide Z9 and pyrolysis gas Z3, and a heating unit 3 that heats the carbonization object Z1 introduced into the carbonization furnace 2. Further, the carbonization apparatus 1 includes a gas combustion unit (13, 14) that burns the pyrolysis gas Z3 generated from the heated carbonization object Z1. And the carbonization apparatus 1 includes one or more heating pipes (6a, 6b, 7a, 7b, 8) that extend within the internal space of the carbonization furnace 2 and introduce the heat flow generated from the pyrolysis gas Z3 burned in the gas combustion unit (13, 14) into the carbonization furnace 2. Thereby, the carbonization apparatus 1 according to Embodiment 1 burns the pyrolysis gas Z3 generated from the carbonization object Z1 heated in the carbonization furnace 2 in the gas combustion unit (13, 14), and returns the heat generated from the burned pyrolysis gas Z3 into the carbonization furnace 2 through each heating pipe, which can be used for heating the carbonization object Z1. According to the carbonization apparatus 1 according to Embodiment 1, the energy consumption required for heating to carbonize the carbonization object Z1 accommodated in the carbonization furnace 2 can be suppressed, and the running cost related to the carbonization process can be suppressed.

[0030] Also, the carbonization apparatus 1 according to Embodiment 1 includes pyrolysis gas ducts (9a, 9b, 10a, 10b) for introducing the pyrolysis gas Z3 from an opening provided in the side wall of the carbonization furnace 2 into the gas combustion unit (13, 14). Thereby, the carbonization apparatus 1 can introduce the pyrolysis gas Z3 in the carbonization furnace 2 generated by heating the carbonization object Z1 into the gas combustion unit (13, 14) through the pyrolysis gas ducts (9a, 9b, 10a, 10b).

[0031] 〔Embodiment 2〕 Next, referring to FIGS. 3 to 6, the carbonization apparatus 1 according to Embodiment 2 will be described. FIG. 3 is a perspective view showing an example of the schematic configuration of the carbonization apparatus 1 according to Embodiment 2, and FIG. 4 is a perspective view for explaining the connection between the carbonization furnace 32 and the gas combustion unit 35 of the carbonization apparatus 1. FIG. 5 is a perspective view for explaining the connection between the carbonization furnace 32 and the heat exchanger 50 of the carbonization apparatus 1 according to Embodiment 2, and FIG. 6 is a perspective view for explaining the flow of pyrolysis gas and heat in the carbonization apparatus 1. The carbonization apparatus 1 according to Embodiment 2 is, for example, an example of a suitable form for a treatment facility that treats carbonization objects in public facilities, factories, apartment houses, and the like.

[0032] The carbonization apparatus 1 according to Embodiment 2 includes an introduction unit 30, a carbonization furnace 32, heating pipes (6a, 6b, 7a, 7b, 8), furnace inner pipes (33a, 33b), pyrolysis gas ducts (34a, 34b), a heating unit 39, a discharge mechanism 5, and a gas combustion unit 35. Further, the carbonization apparatus 1 according to Embodiment 2 includes a blower unit 37 and a heat exchanger 50. The carbonization apparatus 1 according to Embodiment 2 is different from the carbonization apparatus 1 according to Embodiment 1 in that the introduction unit 30, the furnace inner pipes (33a, 33b), the pyrolysis gas ducts (34a, 34b), the blower unit 37, and the heat exchanger 50 are provided. The differences will be mainly described below. However, it is obvious that the configuration of Embodiment 2 is applicable to the configuration of Embodiment 1. For example, in Embodiment 1, the gas combustion units (13, 14) may be provided on the side surface side of the carbonization furnace 2. Also, in Embodiment 1, the heat flow Z8 introduced into the heating pipes (6a, 6b, 7a, 7b, 8) may be introduced into the heat exchanger 50 of Embodiment 2 through the exhaust gas collecting duct 18.

[0033] The introduction unit 30 is provided above the carbonization furnace 32 and is a structure for introducing the carbonization object Z1 into the furnace. Above the introduction unit 30, a receiving port 30a for receiving the carbonization object Z1 is opened, and a control mechanism 31 for controlling the introduction amount of the carbonization object Z1 received through the receiving port 30a into the carbonization furnace 32 is provided. The control mechanism 31 can, for example, control the opening degree step by step It is an opening and closing door capable of performing operations, and has a control unit for controlling the opening degree of the opening and closing door. By controlling the opening degree of the opening and closing door via the control mechanism 31, the introduction amount of the object Z1 to be carbonized introduced into the carbonization furnace 32 through the introduction unit 30 is adjusted.

[0034] The carbonization furnace 32 is a unit equivalent to the carbonization furnace 2 of Embodiment 1, heats the object Z1 to be carbonized introduced into the furnace through the introduction unit 30, and generates carbide and pyrolysis gas. Below the carbonization furnace 32, a heating unit 39 equivalent to the heating unit 3 of Embodiment 1 for heating the object Z1 to be carbonized introduced into the furnace is provided. The heating unit 39 includes a combustion mechanism for burning fuel supplied from the outside. At the bottom of the carbonization furnace 32, a discharge mechanism 5 for discharging the carbide generated by the carbonization treatment is provided. The carbide discharged to the discharge mechanism 5 is carried to the carbide discharge port through a discharge pipe connected to the discharge mechanism 5 by receiving the drive of a rotation mechanism such as a motor connected to the rotation shaft 5a.

[0035] Similar to the carbonization furnace 2 of Embodiment 1, the carbonization furnace 32 includes one or more heating pipes (6a, 6b, 7a, 7b, 8) extending in the internal space. Each heating pipe introduces the heat generated from the pyrolysis gas burned in the gas combustion unit 35 into the carbonization furnace 2. One end of each heating pipe is connected to the other end of a connection pipe 38 whose one end is connected to the air supply unit 37 through a through hole provided in one side wall. The other end of each heating pipe is connected to one end of a connection pipe 40 whose other end is connected to the heat exchanger 50 through a through hole provided in the other side wall.

[0036] In the carbonization furnace 32, the heating tubes (6a, 6b) are arranged on the upper side where the introduction part 30 is provided, and the heating tube 8 is arranged on the bottom side where the discharge mechanism 5 is provided. Further, the heating tubes (7a, 7b) are arranged between the position where the heating tubes (6a, 6b) are arranged and the position where the heating tube 8 is arranged in the vertical direction of the carbonization furnace 32. Also in the carbonization furnace 32, each of the heating tubes 6a, 6b, 8 is arranged so as to form a vertex of a substantially triangle in side view as shown in FIG. 2. Each of the heating tubes 7a, 7b is arranged on the side of a substantially triangle having as sides a line segment formed by the heating tube 6a and the heating tube 8 and a line segment formed by the heating tube 6b and the heating tube 8.

[0037] At least one of the opposing side walls in the longitudinal direction of the carbonization furnace 32 (the direction in which the heating tubes (6a, 6b, 7a, 7b, 8) extend) is provided with dry distillation gas ducts (34a, 34b) for introducing the dry distillation gas generated from the heated carbonization object Z1 into the gas combustion part 35. One end of each of the dry distillation gas ducts (34a, 34b) is connected to the gas combustion part 35, and the other end is connected to an opening provided in one side wall of the carbonization furnace 32.

[0038] The carbonization furnace 32 of Embodiment 2 further includes one or more in-furnace tubes (33a, 33b) extending through the internal space. One end of the in-furnace tube 33a is connected to the opening in the side wall to which the dry distillation gas duct 34a is connected. Similarly, one end of the in-furnace tube 33b is connected to the opening in the side wall to which the dry distillation gas duct 34b is connected. Communication ports for communicating the inside and outside of the in-furnace tube are provided on the peripheral surfaces of the in-furnace tube 33a and the in-furnace tube 33b. In the carbonization furnace 32, the in-furnace tubes (33a, 33b) are arranged on the upper side in the vertical direction from the arrangement positions of the heating tubes (6a, 6b). The dry distillation gas generated from the carbonization object Z1 is introduced into each of the dry distillation gas ducts (34a, 34b) through the communication ports provided on the peripheral surfaces of the in-furnace tubes (33a, 33b). Note that openings may also be provided at the tip surfaces of the in-furnace tubes (33a, 33b) on the side opposite to the side connected to the dry distillation gas ducts (34a, 34b).

[0039] The gas combustion section 35 burns the dry distillation gas introduced from inside the carbonization furnace 2 through the furnace inner pipes (33a, 33b) and the dry distillation gas ducts (34a, 34b) in the same manner as the gas combustion sections 13 or 14 of Embodiment 1. The gas combustion section 35 includes, for example, a combustion mechanism equivalent to the combustion mechanism 13a or 14a of Embodiment 1. One end of the gas combustion section 35 is connected to the other end of a connection pipe 36 whose one end is connected to the blower section 37, and the heat generated by the combustion of the dry distillation gas is transferred through the connection pipe 36 and introduced into the blower section 37.

[0040] The blower section 37 is a unit that supplies the heat generated by the combustion of the dry distillation gas, introduced through the connection pipe 36, to the heating pipes (6a, 6b, 7a, 7b, 8) as a heat flow. The blower section 37 has a blower mechanism that sends out the heat introduced from the gas combustion section 35 through the connection pipe 38 to each heating pipe as a heat flow. Due to the heat flow supplied to each of the heating pipes (6a, 6b, 7a, 7b, 8) through the connection pipe 38, the heat generated by the combustion of the dry distillation gas is refluxed into the carbonization furnace 32.

[0041] The heat exchanger 50 is a unit that performs heat exchange with the exhaust heat introduced through the connection pipe 40. The heat exchanger 50 performs heat exchange, for example, between the exhaust heat introduced through the connection pipe 40 as a heat medium and the hot water supply water supplied from the outside. The heat flow that has undergone heat exchange with the hot water supply water through the heat exchanger 50 is cooled to a temperature suitable for exhaust and exhausted to the outside through the exhaust pipe 51. Also, the hot water supply water after heat exchange that has undergone heat exchange with the exhaust heat introduced through the connection pipe 40 can be used, for example, for hot water supply and heating in the facility.

[0042] (Flow of carbonization process) When the carbonization object Z1 is introduced into the carbonization furnace 32 through the introduction section 30, the opening / closing door closes and the heating by the heating section 39 starts. As the heating progresses, the temperature inside the furnace rises, the carbonization object Z1 accommodated inside the furnace is heated, and dry distillation gas is generated.

[0043] As shown by the thick dashed arrows in FIG. 6, the pyrolysis gas generated from the carbonization target Z1 is introduced into each of the inner furnace tubes (33a, 33b) extending in the internal space of the carbonization furnace 32 through communication ports provided on the circumferential surfaces of the inner furnace tubes. The pyrolysis gas introduced into the inner furnace tube 33a is introduced into the gas combustion section 35 through the pyrolysis gas duct 34a. The pyrolysis gas introduced into the inner furnace tube 33b is introduced into the gas combustion section 35 through the pyrolysis gas duct 34b.

[0044] The heat generated from the pyrolysis gas burned by the gas combustion section 35 is introduced into the blower section 37 through the connection pipe 36 as shown by the thick solid arrows in FIG. 6. The heat generated from the burned pyrolysis gas introduced into the blower section 37 is supplied to each of the heating tubes (6a, 6b, 7a, 7b, 8) as a heat flow through the connection pipe 38. Due to the heat flow supplied to each of the heating tubes (6a, 6b, 7a, 7b, 8), the heat generated by the combustion of the pyrolysis gas is refluxed into the carbonization furnace 32. In the carbonization furnace 32, even if the heating from the heating section 39 is stopped, the carbonization process can be continued by the combustion heat of the pyrolysis gas generated from the carbonization target Z1 due to the combustion heat of the pyrolysis gas refluxed through the heating tubes (6a, 6b, 7a, 7b, 8).

[0045] The heat flow passing through the internal space of the carbonization furnace 32 through each of the heating tubes (6a, 6b, 7a, 7b, 8) is introduced into the heat exchanger 50 as exhaust heat through the connection pipe 40. The heat exchanger 50 performs heat exchange using the exhaust heat introduced through the connection pipe 40 as a heat medium. For example, when hot water for supplying hot water is supplied from the outside to the heat exchanger 50, heat exchange is performed between the exhaust heat and the hot water for supplying hot water, and the exhaust heat after heat exchange is cooled to a temperature suitable for exhaust and exhausted to the outside. Also, the hot water for supplying hot water after heat exchange that has undergone heat exchange with the exhaust heat can be used, for example, for supplying hot water and heating in the facility.

[0046] By the carbonization process of the carbonization device 1, the carbide produced from the object Z1 to be carbonized is discharged to the discharge mechanism 5 provided at the bottom of the carbonization furnace 32 in the same manner as in Embodiment 1. The carbide discharged to the discharge mechanism 5 is driven to rotate by a rotating mechanism such as a motor connected to the rotating shaft 5a, and is carried out to the carbide discharge port through a discharge pipe connected to the discharge mechanism 5. The carbide produced by the carbonization process of the carbonization device 1 is recovered, for example, as biochar derived from organisms and can be used as a soil improvement material or the like.

[0047] As described above, the carbonization device 1 according to Embodiment 2 includes a carbonization furnace 32 that heats the object Z1 to be carbonized introduced into the furnace to generate carbide and pyrolysis gas, a heating unit 39 that heats the object Z1 to be carbonized introduced into the furnace, and a gas combustion unit 35 that burns the pyrolysis gas. And the carbonization device 1 includes one or more heating pipes (6a, 6b, 7a, 7b, 8) that extend the internal space of the carbonization furnace 32 and introduce the heat generated from the pyrolysis gas burned in the gas combustion unit 35 into the carbonization furnace 32. Thereby, also in the carbonization device 1 according to Embodiment 2, the pyrolysis gas generated from the heated object Z1 to be carbonized is burned in the gas combustion unit 35, and the heat generated from the burned pyrolysis gas is refluxed into the internal space of the carbonization furnace 32 through each heating pipe and can be used for heating the object Z1 to be carbonized. In the carbonization furnace 32, due to the combustion heat of the pyrolysis gas refluxed through the heating pipes (6a, 6b, 7a, 7b, 8), for example, even if the heating from the heating unit 39 is stopped, the carbonization process can be continued by the combustion heat of the pyrolysis gas generated from the object Z1 to be carbonized. Also in Embodiment 2, the carbonization device 1 can suppress the energy consumption required for heating to carbonize the object Z1 to be carbonized accommodated in the carbonization furnace 32, and can suppress the running cost related to the carbonization process.

[0048] Further, the carbonization device 1 according to Embodiment 2 further includes one or more in-furnace tubes (33a, 33b) that extend through the internal space of the carbonization furnace 32. One end of the in-furnace tube 33a is connected to an opening in the side wall to which the dry distillation gas duct 34a is connected, and one end of the in-furnace tube 33b is connected to an opening in the side wall to which the dry distillation gas duct 34b is connected. Communication ports that communicate the inside and outside of the in-furnace tubes are provided on the peripheral surfaces of the in-furnace tube 33a and the in-furnace tube 33b, and the dry distillation gas generated from the object to be carbonized Z1 can be introduced into each of the dry distillation gas ducts (34a, 34b) through the communication ports of the respective in-furnace tubes. Since the in-furnace tubes 33a and 33b extend through the internal space of the carbonization furnace 32, they can be introduced into the dry distillation gas ducts (34a, 34b) while maintaining the in-furnace temperature heated by the heating unit 39 and the heating tubes (6a, 6b, 7a, 7b, 8). In the carbonization device 1 according to Embodiment 2, the cost required to burn the dry distillation gas can be further suppressed.

[0049] (Other Embodiments) The above embodiments are merely examples, and the disclosure of the present embodiment can be appropriately modified and implemented without departing from the gist thereof. The processes and means described in the present disclosure can be freely combined and implemented as long as no technical contradictions occur.

[0050] Also, the processes described as being performed by one device may be shared and executed by a plurality of devices. Alternatively, the processes described as being performed by different devices may be executed by one device. How each function is realized by the hardware configuration can be flexibly changed.

[0051] For example, a temperature adjustment mechanism such as the temperature adjustment chamber 15, the connected bypass pipe 22, and the pressure adjustment valve 23 in Embodiment 1, or a pressure adjustment mechanism may be provided in the carbonization device 1 of Embodiment 2.

Description of Reference Numerals

[0052] 1··Carbonization device, 2,32··Carbonization furnace, 3,39··Heating section, 4a,4b,13a,14a··Combustion mechanism, 5··Discharge mechanism, 5a··Rotating shaft, 6a,6b,7a,7b,8··Heating tube, 9a,9b,10a,10b,34a,34b··Retort gas duct, 11,12,16,36,38,40··Connection pipe, 13,14,35··Gas combustion section, 15··Temperature adjustment chamber, 17··Heat flow supply duct, 18··Exhaust gas collection duct, 19··Exhaust gas cooler, 21,51··Exhaust pipe, 22··Bypass pipe, 23··Pressure regulating valve, 24··Carbide discharge port, 30··Introduction section, 30a··Inlet, 31··Control mechanism, 33a,33b··Inner furnace pipe, 50··Heat exchanger, T1,T2,T3,T4,T5,T6,T7,T8, T9··Temperature sensor, Z1··Object to be carbonized, Z3··Retort gas, Z9··Carbide

Claims

1. An introduction part of a combustion product, A carbonization furnace that heats the combustion product introduced from the introduction part to generate carbide and dry distillation gas, A heating part that heats the combustion product introduced into the carbonization furnace, A gas combustion part that burns the dry distillation gas generated from the heated combustion product, A carbonization device comprising a heating pipe that extends within the internal space of the carbonization furnace and introduces heat generated from the dry distillation gas burned in the gas combustion part into the carbonization furnace.

2. The carbonization device according to claim 1, further comprising a duct for dry distillation gas that introduces the dry distillation gas from an opening provided in a side wall of the carbonization furnace into the gas combustion part.

3. The carbonization device according to claim 2, further comprising an in-furnace pipe that extends from the opening into the carbonization furnace, and a communication port that communicates the inside and outside of the in-furnace pipe is provided at at least one of the side wall extending from the opening to the tip of the in-furnace pipe and the tip of the in-furnace pipe.

4. The carbonization device according to claim 1, wherein a discharge mechanism for discharging carbide generated by combustion of the combustion product is provided at the bottom of the carbonization furnace.

5. The introduction part of the combustion product is provided above the carbonization furnace, and has a receiving port for receiving the combustion product from above, The carbonization device according to claim 1, further comprising a control mechanism for controlling the introduction amount of the combustion product received by the receiving port into the carbonization furnace.

6. The carbonization device according to claim 1, wherein the heating pipe extends through the carbonization furnace and is connected to a heat exchanger.

7. The carbonization device according to claim 1, wherein an adjustment mechanism for adjusting the pressure inside the device is provided.

8. The carbonization device according to claim 1, wherein an adjustment mechanism for adjusting at least one of the temperature or pressure of the dry distillation gas burned in the gas combustion part is provided.

9. A processing method of a carbonization device comprising a carbonization furnace that heats the introduced combustion product to generate carbide and dry distillation gas, A step of heating the combustion product introduced into the carbonization furnace, A step of burning the dry distillation gas generated from the heated combustion product, A step of introducing heat generated from the burned dry distillation gas into the carbonization furnace through a heating pipe that extends within the internal space of the carbonization furnace, A processing method for performing the above steps.

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