Carbonization furnace and its control method

Abstract

To provide a carbonization furnace capable of appropriately managing a material to be carbonized from drying to carbonization.SOLUTION: A carbonization furnace 1A includes: a drying chamber 5a that dries a material to be carbonized W; a drying chamber belt conveyor 9 provided inside the drying chamber 5a and configured to transport the material to be carbonized W; a carbonization chamber 5b that carbonizes the material to be carbonized W dried in the drying chamber 5a; a carbonization chamber belt conveyor 15 provided inside the carbonization chamber 5b and configured to transport the material to be carbonized W guided from the drying chamber belt conveyor 9; and a control unit configured to individually control a drying chamber transport speed V1 of the drying chamber belt conveyor 9 and a carbonization chamber transport speed V2 of the carbonization chamber belt conveyor 15.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a carbonization furnace and a control method thereof. [Background technology]

[0002] A carbonization furnace is known that obtains carbonized material by dry distilling material to be carbonized, such as woody biomass (Patent Document 1). Patent Document 1 discloses that combustion gas is caused to flow around the periphery of a carbonization chamber, thereby heating and carbonizing the woody biomass raw material contained in a carbonization tray inside the carbonization chamber with radiant heat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-21173 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 describes a batch-type process in which woody biomass raw materials are placed in a carbonization tray and carbonized, with the carbonization tray removed once carbonization is complete. However, it does not disclose a continuous process in which woody biomass raw materials are dried and carbonized while being continuously transported. The continuous process allows for continuous production of carbonized material, making it easier to adjust production volume compared to the batch process. However, because the material to be carbonized undergoes a series of processes, from drying to carbonization, while being transported continuously, there is a problem in that it is difficult to appropriately adjust the temperatures and times of the drying and carbonization processes.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a carbonization furnace and a control method thereof that can appropriately manage the process from drying to carbonization of the material to be carbonized. [Means for solving the problem]

[0006] A carbonization furnace according to one aspect of the present disclosure includes a drying chamber for drying materials to be carbonized, a drying chamber transport unit provided inside the drying chamber for transporting the materials to be carbonized, a carbonization chamber for carbonizing the materials to be carbonized dried in the drying chamber, a carbonization chamber transport unit provided inside the carbonization chamber for transporting the materials to be carbonized introduced from the drying chamber transport unit, and a control unit for individually controlling the transport speed of the drying chamber transport unit and the transport speed of the carbonization chamber transport unit, wherein the control unit: dried in the drying chamber Carburized material Shows the moisture content relative to the set value Controlling the conveying speed of the drying chamber conveying section according to the drying state, Carbonized in the carbonization chamber Carburized material Indicates the carbonization level relative to the set value The transport speed of the carbonization chamber transport section is controlled according to the carbonization state.

[0007] A method for controlling a carbonization furnace according to one aspect of the present disclosure is a method for controlling a carbonization furnace including a drying chamber for drying materials to be carbonized, a drying chamber conveying section provided inside the drying chamber for conveying the materials to be carbonized, a carbonization chamber for carbonizing the materials dried in the drying chamber, and a carbonization chamber conveying section provided inside the carbonization chamber for conveying the materials to be carbonized introduced from the drying chamber conveying section, wherein the conveying speed of the drying chamber conveying section and the conveying speed of the carbonization chamber conveying section are each individually controlled; dried in the drying chamber Carburized material Shows the moisture content relative to the set value Controlling the conveying speed of the drying chamber conveying section according to the drying state, Carbonized in the carbonization chamber Carburized material Indicates the carbonization level relative to the set value The transport speed of the carbonization chamber transport section is controlled according to the carbonization state. [Effects of the Invention]

[0008] It is possible to properly manage the process from drying to carbonization of the material to be carbonized. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram illustrating a carbonization furnace according to an embodiment of the present disclosure. FIG. [Figure 2] FIG. 2 is a schematic diagram showing a modified example of the configuration of FIG. [Figure 3] FIG. 2 is a side view showing a modified example of the partition wall of FIG. 1 and showing a container of a carbonization furnace. [Figure 4] FIG. 4 is a perspective view showing a schematic shape of the partition wall of FIG. 3. [Figure 5] 5 is a cross-sectional view taken along the arrows VV in FIG. 4, showing a flow path provided in a partition wall. [Figure 6] 1. FIG. 5 is a view showing a carbonization furnace vessel with another modified example of the partition wall of FIG. 1, where (a) is a side view showing the partition wall positioned at the top, and (b) is a side view showing the partition wall positioned at the bottom. [Figure 7] FIG. 6(b) is an enlarged view of part B in FIG. 6(a). [Figure 8] 1. FIG. 5 is a view showing a carbonization furnace vessel illustrating another modified example of the partition wall of FIG. 1, in which (a) is a side view in which the partition wall is positioned on the left side, and (b) is a side view in which the partition wall is positioned on the right side. [Figure 9] FIG. 8(b) is an enlarged view of part C in FIG. 8(a). [Figure 10] FIG. 10 is a schematic diagram showing another modified example of the carbonization furnace of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. A carbonization furnace 1A of this embodiment is shown in Figure 1. Note that the carbonization furnace of the present disclosure includes not only a carbonization furnace that produces biochar from biomass raw materials, but also a reactor that produces biofuel from biomass raw materials.

[0011] The carbonization furnace 1A is fixed to the loading platform 3a of the vehicle 3. The carbonization furnace 1A may be detachable from the loading platform 3a.

[0012] The carbonization furnace 1A includes a container 5 capable of forming an airtight space, and a feeding hopper 6 provided on the top of the container 5 and into which a material to be carbonized W, which is a biomass raw material, is fed. The biomass raw material is, for example, wood-based.

[0013] The container 5 can be supplied with the material to be carbonized W and is equipped with a drying chamber 5a and a carbonization chamber 5b. The drying chamber 5a and the carbonization chamber 5b are separated by a partition wall 5c. The partition wall 5c is a partition wall fixed to the ceiling of the container 5 and extending downward. In FIG. 1, the drying chamber 5a is located to the right of the partition wall 5c, and the carbonization chamber 5b is located to the left of the partition wall 5c. A communication part 5d is formed below the partition wall 5c, which connects the drying chamber 5a and the carbonization chamber 5b. The material to be carbonized W is transported through the communication part 5d.

[0014] The drying chamber 5a is provided with an electric heater 7. The electric heater 7 is used as a heat source for drying the material to be carbonized W. The output of the electric heater 7 is controlled by a control unit (not shown).

[0015] A drying chamber belt conveyor (drying chamber transport section) 9 is provided below the electric heater 7. The drying chamber belt conveyor 9 extends horizontally and includes an endless belt 9a and multiple rollers 9b around which the belt 9a is wound. The belt 9a is mesh-like, such as a wire mesh, that can hold the material to be carbonized W and allow air to pass through. The rollers 9b are rotated by a drive motor M1, and the rotation speed is controlled by a control unit. The control unit controls the drive motor M1 so as to achieve a predetermined drying chamber transport speed V1.

[0016] An intermediate hopper (storage section) 11 is provided below the drying chamber belt conveyor 9. The intermediate hopper 11 is a container that receives and temporarily stores the material to be carbonized W transported by the drying chamber belt conveyor 9. The intermediate hopper 11 may be omitted.

[0017] The intermediate hopper 11 is provided with a rotary feeder (feeder mechanism) 13. The rotary feeder 13 is controlled by a control unit and supplies the material W to be carbonized in the intermediate hopper 11 at a predetermined supply speed to a carbonization chamber belt conveyor (carbonization chamber transport unit) 15 located downstream. Note that if the intermediate hopper 11 is not provided, the rotary feeder 13 is also omitted.

[0018] The intermediate hopper 11 is provided with an analysis unit (measurement unit) AT1. The analysis unit AT1 analyzes the solid components of the carbonized material W. The output of the analysis unit AT1 is sent to the control unit. The analysis unit AT quantitatively analyzes the moisture content, fixed carbon, volatile components, etc. of the carbonized material W dried in the drying chamber 5a. If the intermediate hopper 11 and rotary feeder 13 are omitted, the analysis unit AT1 is installed so that the carbonized material W is analyzed just before it is received by the carbonization chamber belt conveyor 15.

[0019] The drying chamber 5a is provided with a temperature sensor (measuring unit) TX1 that measures the temperature of the gas inside the drying chamber 5a. The output of the temperature sensor TX1 is sent to the control unit.

[0020] The carbonization chamber 5b is provided with a carbonization chamber belt conveyor 15. The carbonization chamber belt conveyor 15 extends horizontally, with a portion of the upstream side (right side in FIG. 1) extending to the drying chamber 5a. This is to receive the dried material W to be carbonized from the rotary feeder 13 provided in the drying chamber 5a. The carbonization chamber belt conveyor 15 includes an endless belt 15a and multiple rollers 15b around which the belt 15a is wound. The belt 15a is mesh-shaped, such as a wire mesh, that can hold the material W to be carbonized and allows air to pass through. The rollers 15b are rotated by a drive motor M2, and the rotation speed is controlled by a control unit. The control unit controls the drive motor M2 to achieve a predetermined drying chamber conveying speed V1.

[0021] The container 5 (carbonization chamber 5b and drying chamber 5a) is provided with multiple air supply units (oxidizer supply units), not shown. The air ratio inside the container 5 is adjusted by the air supplied from the air supply units. Note that other oxidizers, such as water vapor, may be used instead of air. The carbonization chamber 5b is set to an oxygen-deficient state, with an air ratio of, for example, about 0.6 to 0.7, thereby partially burning the material W to be carbonized. Carbonization of the material W progresses while it is transported in the direction of arrow A1 by the carbonization chamber belt conveyor 15. Note that in the same figure, the symbol FL indicates a flame.

[0022] The coking chamber 5b is provided with a temperature sensor TX2 that measures the temperature of the gas inside the chamber 5b. The output of the temperature sensor TX2 is sent to the control unit.

[0023] A coal product removal section 17 is provided for removing and storing coal product that has been carbonized in the carbonization chamber 5b. The coal product removal section 17 is provided with an analysis section AT2 that performs solid component analysis of the coal product (carbonized material) W1. The analysis section AT2 analyzes the amount of fixed carbon in the coal product W1, etc. The output of the analysis section AT2 is sent to the control section.

[0024] The control unit is composed of, for example, a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), and computer-readable storage media. A series of processes for realizing various functions is stored in, for example, a storage medium in the form of a program. The CPU reads this program into RAM and executes information processing and arithmetic operations to realize various functions. The program may be pre-installed in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or distributed via wired or wireless communication means. Examples of computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, and semiconductor memories.

[0025] <Control method of carbonization furnace 1A> Next, a method for controlling the carbonization furnace 1A having the above-described configuration will be described. First, the material to be carbonized W before drying is charged from the charging hopper 6 into the drying chamber 5a of the container 5. The material to be carbonized W charged from the charging hopper 6 into the drying chamber 5a is transported in a stacked state on the drying chamber belt conveyor 9. The material to be carbonized W is dried while being transported by the drying chamber belt conveyor 9.

[0026] The interior of the drying chamber 5a is heated by an electric heater 7. Heat is also transferred to the drying chamber 5a from the carbonization chamber 5b through a communication portion 5d formed below the partition wall 5c. The heat transferred through the communication portion 5d promotes drying within the drying chamber 5a.

[0027] The drying chamber conveying speed V1 of the drying chamber belt conveyor 9 is controlled by the control unit based on the measurement value of the analysis unit AT1. For example, if the moisture content of the carbonized material W obtained by the analysis unit AT1 is greater than a set value, the drying chamber conveying speed V1 is reduced to extend the drying time. Correction may also be made based on the measurement value of the temperature sensor TX1. If the temperature measured by the temperature sensor TX1 is lower than a set value, the drying chamber conveying speed V1 is reduced to extend the drying time. Note that the drying chamber conveying speed V1 may also be controlled using only the temperature sensor TX1 without using the analysis unit AT1.

[0028] The material to be carbonized W that has been transported and dried by the drying chamber belt conveyor 9 is led to the intermediate hopper 11. The intermediate hopper 11 temporarily stores the material to be carbonized W. This makes it possible to absorb the difference between the drying chamber transport speed V1 and the carbonization chamber transport speed V2.

[0029] The material W stored in the intermediate hopper 11 is supplied to the carbonization chamber belt conveyor 15 by the rotary feeder 13 in a predetermined amount adjusted by the control unit. If the intermediate hopper 11 and the rotary feeder 13 are omitted, the material W is supplied directly from the drying chamber belt conveyor 9 to the carbonization chamber belt conveyor 15.

[0030] When the material W to be carbonized is introduced into the carbonization chamber 5b by the carbonization chamber belt conveyor 15, the material W is ignited and partial combustion occurs under oxygen deficiency. Ignition is performed using an ignition unit (not shown) at the beginning of startup, but after startup, ignition occurs without using an ignition unit when the temperature inside the carbonization chamber 5b reaches the ignition temperature. The air ratio inside the carbonization chamber 5b is set to, for example, approximately 0.6 to 0.7. As the material W to be carbonized is transported by the carbonization chamber belt conveyor 15, carbonization progresses.

[0031] The carbonization chamber conveying speed V2 of the carbonization chamber belt conveyor 15 is controlled by the control unit based on the measurement value of the analysis unit AT2 provided in the product coal removal unit 17. For example, if the carbonization degree of the product coal W1 obtained by the analysis unit AT2 is lower than the set value, the carbonization chamber conveying speed V2 is reduced to extend the carbonization time. Here, the carbonization degree means the proportion of fixed carbon in the remaining components after removing moisture and ash from the product coal W1, expressed as a weight percentage.

[0032] Correction may also be made based on the measurement value of the temperature sensor TX2 installed in the coking chamber 5b. If the temperature measured by the temperature sensor TX2 is lower than the set value, the coking chamber transport speed V2 is reduced to extend the carbonization time. Note that the coking chamber transport speed V2 may also be controlled using only the temperature sensor TX2 without using the analysis unit AT2.

[0033] The material to be carbonized W that has been carbonized in the carbonization chamber 5b is collected in the product coal removal section 17 as product coal W1.

[0034] The above-described embodiment has the following advantages. By individually controlling the drying chamber conveying speed V1 and the carbonization chamber conveying speed V2, it is possible to control the drying chamber conveying speed V1 according to the drying state of the material to be carbonized W, and to control the carbonization chamber conveying speed V2 according to the carbonization state of the material to be carbonized W. This allows the drying and carbonization of the material to be carbonized W to be appropriately controlled, thereby making it possible to appropriately manage the process from drying to carbonization of the material to be carbonized W.

[0035] A partition wall 5c is provided between the drying chamber 5a and the carbonization chamber 5b, and a communication section 5d is provided between the drying chamber 5a and the carbonization chamber 5b. As a result, while the carbonization chamber 5b is separated by the partition wall 5c, the heat of the high-temperature carbonization chamber 5b is transferred to the drying chamber 5a via the communication section 5d, and the amount of heat required for drying is guided to the drying chamber 5a, thereby achieving carbonization with high thermal efficiency.

[0036] An intermediate hopper 11 is provided in the drying chamber 5a to temporarily store the material W to be carbonized discharged from the drying chamber belt conveyor 9. This allows the amount and timing of the material W to be supplied to the carbonization chamber belt conveyor 15 to be different from that of the drying chamber belt conveyor 9, allowing appropriate control of drying and carbonization according to the properties of the material W. Furthermore, when using raw materials with low moisture content and a slow carbonization rate, the movement speed of the drying chamber belt conveyor 9 is controlled to be fast, while the movement speed of the carbonization chamber belt conveyor 15 is controlled to be slow. This could result in excessive supply of raw materials from the drying chamber 5a to the carbonization chamber 5b, which could cause the material W to block the outlet of the carbonization chamber 5b. In such cases, providing the intermediate hopper 11 can prevent the material W from blocking the outlet of the carbonization chamber 5b.

[0037] The analysis unit AT1 and / or the temperature sensor TX1 provided in the drying chamber 5a can obtain the drying state of the material to be carbonized W. The drying chamber conveying speed V1 is controlled based on this, so that appropriate drying can be performed.

[0038] The carbonization state of the material W can be obtained by the analysis section AT2 provided in the product charcoal removal section 17 and / or the temperature sensor TX2 provided in the carbonization chamber 5b. Based on this, the carbonization chamber transport speed V2 is controlled, thereby enabling appropriate carbonization.

[0039] This embodiment can be modified as follows. <Variation 1> 2, an analysis unit (measurement unit) AT3 for performing gas analysis may be provided in the drying chamber 5a, and an analysis unit (measurement unit) AT4 for performing gas analysis may be provided in the carbonization chamber 5b. These analysis units AT3 and AT4 may be used independently to control the drying chamber transport speed V1 and the carbonization chamber transport speed V2, or may be used in combination with the above-mentioned analysis units AT1 and AT2 and / or temperature sensors TX1 and TX2.

[0040] The analyzer AT3 provided in the drying chamber 5a measures, for example, the water vapor concentration in the gas. If the water vapor concentration is lower than a set value, it is determined that the drying is not progressing, and the drying chamber conveying speed V1 is controlled to decrease.

[0041] In the analysis unit AT4 provided in the carbonization chamber 5b, for example, the concentrations of carbon monoxide, hydrogen, carbon dioxide, hydrocarbons such as methane in the gas are measured, and the control unit determines the progress of carbonization in the carbonization chamber 5b and controls the carbonization chamber transport speed V2. For example, when the carbon dioxide concentration in the gas is greater than a set value, it is determined that carbonization is progressing, and the carbonization chamber transport speed V2 is controlled to decrease.

[0042] <Variation 2> The above-described partition wall 5c can be modified as shown in FIGS. As shown in Fig. 3, the air supply chamber 20 is connected to the upper part of the partition wall 5c. As shown in Fig. 4, the air supply chamber 20 is hollow, and is structured so that air (cooling medium) is supplied from one side and the air is discharged to the outside from the other side. As shown in Fig. 5, the partition wall 5c has a serpentine flow path (cooling medium flow path) 5c1 formed therein. As a result, air introduced into the air supply chamber 20 passes through the flow path 5c1 formed in the partition wall 5c and is discharged from the outlet of the air supply chamber 20.

[0043] By circulating air or water through the flow paths 5c1 formed in the partition wall 5c in this manner, the temperature of the partition wall 5c can be controlled to a predetermined temperature. This makes it possible to appropriately control the amount of heat transfer between the carbonization chamber 5b and the drying chamber 5a. Furthermore, by cooling the partition wall 5c with air or water, it is possible to extend the life of the partition wall 5c, which receives heat from both the drying chamber 5a and the carbonization chamber 5b.

[0044] Instead of air, water or water vapor may be used as the cooling medium. Also, the air flow direction into the air supply chamber 20 may be other flow paths, such as flowing in from both ends and expelling from the center.

[0045] <Variation 3> The above-described partition wall 5c can be modified as shown in FIGS. As shown in Figures 6(a) and 6(b), the partition wall 5c may be made movable up and down. This allows the area of ​​the communication section 5d to be variable. If the partition wall 5c is positioned upward as in Figure 6(a), the area of ​​the communication section 5d can be increased, thereby increasing the heat transfer from the carbonization chamber 5b to the drying chamber 5a. If the partition wall 5c is positioned downward as in Figure 6(b), the area of ​​the communication section 5d can be reduced, thereby reducing the heat transfer from the carbonization chamber 5b to the drying chamber 5a.

[0046] The partition wall 5c is moved in response to a command from the control unit. FIG. 7 is an enlarged view of part B in FIG. 6, showing the vertical movement mechanism 22 that moves the partition wall 5c in the vertical direction. The vertical movement mechanism 22 includes a rack portion 22a formed on the upper part of the partition wall 5c and a pinion 22b that meshes with the rack portion 22a. The rotation of the pinion 22b is controlled by the control unit. By rotating the pinion 22b in both directions, the partition wall 5c moves in the vertical direction together with the rack portion 22a. The partition wall 5c is airtightly sealed between the container 5 and the outside by a seal portion 24.

[0047] As described above, the partition wall 5c is movable so that the communicating area of ​​the communicating portion 5d can be changed, thereby adjusting the amount of heat transferred between the drying chamber 5a and the carbonizing chamber 5b via the communicating portion 5d, and appropriately adjusting the temperatures of the drying chamber 5a and the carbonizing chamber 5b.

[0048] <Variation 4> The above-described partition wall 5c can be modified as shown in FIGS. 8(a) and 8(b), the partition wall 5c may be made movable left and right (horizontally), thereby allowing the volume ratio between the drying chamber 5a and the carbonization chamber 5b to be changed.

[0049] As shown in Figure 8(a), by positioning the partition wall 5c further to the left than in Figure 8(b), the volume of the drying chamber 5a can be made larger than that of the carbonization chamber 5b. This makes it possible to deal with cases where a large drying capacity is required in the drying chamber 5a, such as when the moisture content of the material W to be carbonized in the drying chamber 5a is higher than expected.

[0050] As shown in Figure 8(b), by positioning the partition wall 5c further to the right than in Figure 8(a), the volume of the carbonization chamber 5b can be made larger than that of the drying chamber 5a. This makes it possible to deal with cases where the volume to be processed in the carbonization chamber 5b is larger than the volume to be processed in the drying chamber 5a, such as when there is a large demand for product coal W1.

[0051] The partition wall 5c is moved in response to a command from the control unit. FIG. 9 is an enlarged view of part C in FIG. 8, showing the horizontal movement mechanism 26 that moves the partition wall 5c in the horizontal direction. The horizontal movement mechanism 26 includes a rack portion 26a and a pinion 26b that meshes with the rack portion 26a. The rack portion 26a is provided on a horizontal plate 5c2 provided on the upper part of the partition wall 5c. The rotation of the pinion 26b is controlled by the control unit. By rotating the pinion 26b in both directions, the partition wall 5c moves back and forth horizontally together with the rack portion 26a. The partition wall 5c is airtightly sealed between the container 5 and the outside by a seal portion 28.

[0052] As described above, the partition wall 5c is made movable in the horizontal direction so that the volume ratio between the drying chamber 5a and the carbonization chamber 5b separated by the partition wall 5c can be changed. This makes it possible to appropriately adjust the temperature, carbonization time, drying time, and ultimately the processing amount and processing speed of the drying chamber 5a and the carbonization chamber 5b according to the properties of the material to be carbonized W.

[0053] <Variation 5> The carbonization furnace 1A shown in FIG. 1 can be modified into a carbonization furnace 1B shown in FIG. In the carbonization furnace 1A shown in Fig. 1, the drying chamber 5a and the carbonization chamber 5b are arranged next to each other in the horizontal direction, but the drying chamber 5a may be installed above the carbonization chamber 5b, as in the carbonization furnace 1B shown in Fig. 10. Even in this configuration, the drying chamber 5a and the carbonization chamber 5b are separated by a partition wall 5c, and the drying chamber 5a and the carbonization chamber 5b are communicated with each other via a communication part 5d.

[0054] As shown in Fig. 10, a heat transfer tube 30 for heating, through which a heating medium such as steam flows, may be provided instead of the electric heater 7 shown in Fig. 1. The steam as a heating medium can be generated using heat generated in the carbonization chamber 5b, for example.

[0055] In addition, in FIG. 10, the intermediate hopper 11, the rotary feeder 13, and the analyzing unit AT1 shown in FIG. 1 are omitted, but these may be provided in the configuration.

[0056] The carbonization furnace and the control method thereof described in each of the above-described embodiments can be understood, for example, as follows.

[0057] The carbonization furnace (1A, 1B) according to the first aspect of the present disclosure comprises a drying chamber (5a) for drying the material to be carbonized (W), a drying chamber conveying section (9) provided inside the drying chamber (5a) for conveying the material to be carbonized (W), a carbonization chamber (5b) for carbonizing the material to be carbonized (W) dried in the drying chamber (5a), a carbonization chamber conveying section (15) provided inside the carbonization chamber (5b) for conveying the material to be carbonized (W) guided from the drying chamber conveying section (9), and a control section for individually controlling the conveying speed (V1) of the drying chamber conveying section (9) and the conveying speed (V2) of the carbonization chamber conveying section (15).

[0058] By separately controlling the conveying speed of the drying chamber conveying section and the conveying speed of the carbonization chamber conveying section, it is possible to control the conveying speed of the drying chamber conveying section according to the drying state of the material to be carbonized, and to control the conveying speed of the carbonization chamber conveying section according to the carbonization state of the material to be carbonized. In this way, by appropriately controlling the drying and carbonization of the material to be carbonized, it is possible to appropriately manage the process from drying to carbonization of the material to be carbonized.

[0059] The carbonization furnace (1A, 1B) according to the second aspect of the present disclosure is the same as that of the first aspect, except that a partition wall (5c) separating the drying chamber (5a) and the carbonization chamber (5b) and a communication section (d) connecting these spaces are provided between the drying chamber (5a) and the carbonization chamber (5b).

[0060] A partition wall is provided between the drying chamber and the carbonization chamber, and a communication part that connects the drying chamber and the carbonization chamber. As a result, while the carbonization chamber is separated by the partition wall, the heat from the high-temperature carbonization chamber is transferred to the drying chamber via the communication part, and the amount of heat required for drying is directed to the drying chamber, thereby achieving carbonization with high thermal efficiency.

[0061] In the carbonization furnace (1A, 1B) according to a third aspect of the present disclosure, in the second aspect, the partition wall (5c) is provided with a cooling medium flow path (5c1) through which a cooling medium flows.

[0062] By circulating a cooling medium through the partition wall, the temperature of the partition wall can be controlled to a predetermined temperature. This makes it possible to appropriately control the amount of heat exchanged between the carbonization chamber and the drying chamber. Furthermore, by cooling the partition wall, the life of the partition wall, which receives heat from both the drying chamber and the carbonization chamber, can be extended. The cooling medium may be water, steam, air, or the like.

[0063] The carbonization furnace (1A, 1B) according to a fourth aspect of the present disclosure is the second or third aspect, wherein the partition wall (5c) is movable so that the communicating area of ​​the communicating portion (5d) changes.

[0064] The partition wall is movable so that the communicating area in the communicating part can be changed. This makes it possible to adjust the amount of heat transferred between the drying chamber and the carbonization chamber via the communicating part, and to appropriately adjust the temperatures of the drying chamber and the carbonization chamber. The movement of the partition wall is preferably controlled by a control unit.

[0065] The carbonization furnace (1A, 1B) according to a fifth aspect of the present disclosure is any one of the second to fourth aspects, wherein the partition wall (5c) is movable so that the volume ratio between the drying chamber (5a) and the carbonization chamber (5b) separated by the partition wall (5c) changes.

[0066] The partition wall is movable so that the volume ratio between the drying chamber and the carbonization chamber separated by the partition wall can be changed. This makes it possible to appropriately adjust the temperature, carbonization time, drying time, and ultimately the processing amount and processing speed of the drying chamber and the carbonization chamber depending on the properties of the material to be carbonized. The movement of the partition wall is preferably controlled by a control unit.

[0067] The carbonization furnace (1A, 1B) according to the sixth aspect of the present disclosure is any one of the first to fifth aspects, in which the drying chamber (5a) is provided with a storage section (11) for temporarily storing the material to be carbonized (W) discharged from the drying chamber conveying section (9).

[0068] A storage section is provided in the drying chamber to temporarily store the material to be carbonized discharged from the drying chamber conveying section. This allows the amount and timing of the material to be supplied to the carbonization chamber conveying section to be different from that of the drying chamber conveying section, making it possible to appropriately control drying and carbonization according to the properties of the material to be carbonized. The amount of material to be carbonized supplied is preferably controlled by a feeder mechanism such as a rotary feeder provided in the storage section.

[0069] The carbonization furnace (1A, 1B) according to the seventh aspect of the present disclosure is any one of the first to sixth aspects, in which a measurement unit is provided in the drying chamber, such as a solid analysis unit (AT1) that performs component analysis of the material to be carbonized (W) after passing through the drying chamber conveying unit (9), and / or a gas analysis unit (AT3) that performs component analysis of the gas in the drying chamber (5a), and / or a temperature sensor (TX1) that measures the temperature of the drying chamber (5a), and the control unit controls the conveying speed (V1) of the drying chamber conveying unit (9) based on the results of the measurement unit.

[0070] The measuring unit can obtain the drying state of the material to be carbonized. The conveying speed of the drying chamber conveying unit is controlled based on this, so that appropriate drying can be performed.

[0071] The carbonization furnace (1A, 1B) according to an eighth aspect of the present disclosure is, in any one of the first to seventh aspects, provided with a measurement unit including a solid analysis unit (AT2) that performs a component analysis of the carbonized material (W1) after carbonization in the carbonization chamber (5b), and / or a gas analysis unit (AT4) that performs a component analysis of the gas in the carbonization chamber (5b), and / or a temperature sensor (TX2) that measures the temperature of the carbonization chamber (5b), and the control unit controls the conveying speed (V2) of the carbonization chamber conveying unit (15) based on the results of the measurement unit.

[0072] The carbonization state of the material to be carbonized can be obtained by the measuring unit. The transport speed of the carbonization chamber transport unit is controlled based on this, so that appropriate carbonization can be performed.

[0073] The carbonization furnace (1A, 1B) according to a ninth aspect of the present disclosure is capable of being attached to a vehicle (3) in any one of the first to eighth aspects.

[0074] A control method for a carbonization furnace (1A, 1B) relating to the first aspect of the present disclosure is a control method for a carbonization furnace (1A, 1B) equipped with a drying chamber (5a) for drying the material to be carbonized (W), a drying chamber conveying section (9) provided inside the drying chamber (5a) for conveying the material to be carbonized (W), a carbonization chamber (5b) for carbonizing the material to be carbonized (W) dried in the drying chamber (5a), and a carbonization chamber conveying section (15) provided inside the carbonization chamber (5b) for conveying the material to be carbonized (W) guided from the drying chamber conveying section (9), and the conveying speed (V1) of the drying chamber conveying section (9) and the conveying speed (V2) of the carbonization chamber conveying section (15) are each individually controlled. [Explanation of symbols]

[0075] 1A,1B Carbonization furnace 3 vehicles 3a Cargo bed 5 containers 5a Drying room 5b Carbonization chamber 5c Partition wall (bulk) 5c1 Flow path (coolant flow path) 5c2 horizontal board 5d Communication part 7 Electric heater 9 Drying chamber belt conveyor (drying chamber transport section) 9a Belt 9b Laura 11 Intermediate hopper (storage section) 13 Rotary feeder (feeder mechanism) 15 Carbonization chamber belt conveyor (carbonization chamber transport section) 17 Product charcoal removal section 20 Air supply chamber 22 Up and down movement mechanism 22a Rack section 22b Pinion 24 Seal part 26 Horizontal movement mechanism 26a Rack section 26b Pinion 28 Seal part 30 Heat transfer tube for heating AT1, AT2, AT3, AT4 Analysis section (measurement section) FL flame M1, M2 drive motor TX1, TX2 temperature sensor (measurement part) V1 Drying chamber transport speed V2 carbonization chamber transport speed W Carbide W1 Product carbon (carbide)

Claims

1. a drying chamber for drying the material to be carbonized; a drying chamber conveying section provided inside the drying chamber and conveying the material to be carbonized; a carbonization chamber for carbonizing the material dried in the drying chamber; a carbonization chamber conveying section provided inside the carbonization chamber and conveying the material to be carbonized introduced from the drying chamber conveying section; a control unit that individually controls a conveying speed of the drying chamber conveying unit and a conveying speed of the carbonization chamber conveying unit; Equipped with The control unit controls the conveying speed of the drying chamber conveying unit in accordance with the drying state, which indicates how the moisture content of the carbonized material dried in the drying chamber compares with a set value, and also controls the conveying speed of the carbonization chamber conveying unit in accordance with the carbonization state, which indicates how the carbonization degree of the carbonized material carbonized in the carbonization chamber compares with a set value.

2. 2. The carbonization furnace according to claim 1, wherein a partition wall separating the drying chamber and the carbonization chamber and a communication part connecting these spaces are provided between the drying chamber and the carbonization chamber.

3. The carbonization furnace according to claim 2, wherein the partition wall is provided with a cooling medium flow path through which a cooling medium flows.

4. 3. The carbonization furnace according to claim 2, wherein the partition wall is movable so that the communicating area of ​​the communicating portion changes.

5. 3. The carbonization furnace according to claim 2, wherein the partition wall is movable so that a volume ratio between the drying chamber and the carbonization chamber separated by the partition wall can be changed.

6. 2. The carbonization furnace according to claim 1, wherein the drying chamber is provided with a storage section for temporarily storing the material to be carbonized discharged from the drying chamber transport section.

7. As a measuring unit, a solid analysis unit that performs component analysis of the material to be carbonized after passing through the drying chamber conveying unit, and / or a gas analysis unit that performs component analysis of the gas in the drying chamber, and / or a temperature sensor that measures the temperature of the drying chamber are provided in the drying chamber, The carbonization furnace according to claim 1 , wherein the control unit controls a conveying speed of the drying chamber conveying unit based on the measurement result of the measuring unit.

8. As the measurement unit, a solid analysis unit that performs component analysis of the carbonized material after carbonization in the carbonization chamber, and / or a gas analysis unit that performs component analysis of the gas in the carbonization chamber, and / or a temperature sensor that measures the temperature of the carbonization chamber are provided, The carbonization furnace according to claim 1 , wherein the control unit controls a transport speed of the carbonization chamber transport unit based on the result of the measurement unit.

9. 2. The carbonization furnace according to claim 1, which is mountable on a vehicle.

10. a drying chamber for drying the material to be carbonized; a drying chamber conveying section provided inside the drying chamber and conveying the material to be carbonized; a carbonization chamber for carbonizing the material dried in the drying chamber; a carbonization chamber conveying section provided inside the carbonization chamber and conveying the material to be carbonized introduced from the drying chamber conveying section; A method for controlling a carbonization furnace comprising: The conveying speed of the drying chamber conveying section and the conveying speed of the carbonization chamber conveying section are controlled individually, A method for controlling a carbonization furnace, which controls the conveying speed of the drying chamber conveying section in accordance with the drying state, which indicates how the moisture content of the material dried in the drying chamber compares with a set value, and controls the conveying speed of the carbonization chamber conveying section in accordance with the carbonization state, which indicates how the carbonization degree of the material carbonized in the carbonization chamber compares with a set value.

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