Carbonization furnace and control method thereof

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 a carbonized material by dry distilling a material to be carbonized, such as woody biomass (Patent Document 1). Patent Document 1 discloses that a combustion gas is caused to flow around the outside of a carbonization chamber, and the woody biomass raw material stored in a carbonization tray inside the carbonization chamber is heated by radiant heat and carbonized. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-21173 A 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, and the carbonization tray is removed when 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 can continuously produce carbonized material, so it is easier to adjust the production volume compared to the batch process. On the other hand, there is a problem in that it is difficult to appropriately adjust the temperature and time of each process in the drying and carbonization processes because the material to be carbonized is continuously transported through a series of processes from drying to carbonization.

[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 embodiment of the present disclosure comprises a drying chamber for drying the material to be carbonized, a drying chamber transport section provided inside the drying chamber for transporting the material to be carbonized, a carbonization chamber for carbonizing the material to be carbonized dried in the drying chamber, a carbonization chamber transport section provided inside the carbonization chamber for transporting the material to be carbonized guided from the drying chamber transport section, and a control section for individually controlling the transport speed of the drying chamber transport section and the transport speed of the carbonization chamber transport section.

[0007] A control method for a carbonization furnace according to one embodiment of the present disclosure is a control method for a carbonization furnace comprising a drying chamber for drying the material to be carbonized, a drying chamber transport section provided inside the drying chamber for transporting the material to be carbonized, a carbonization chamber for carbonizing the material to be carbonized dried in the drying chamber, and a carbonization chamber transport section provided inside the carbonization chamber for transporting the material to be carbonized guided from the drying chamber transport section, wherein the transport speed of the drying chamber transport section and the transport speed of the carbonization chamber transport section are each individually controlled. Effect of the Invention

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

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

Mode for Carrying Out the Invention

[0010] Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. FIG. 1 shows a carbonization furnace 1A of the present embodiment. The carbonization furnace of the present disclosure includes not only a carbonization furnace for producing biochar from biomass raw materials but also a reactor for producing biofuel from biomass raw materials.

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

[0012] The carbonization furnace 1A includes a container 5 capable of forming a sealed space, and a charging hopper 6 provided at the upper part of the container 5 for charging the material to be carbonized W, which is a biomass raw material. For example, a woody biomass raw material is used.

[0013] The container 5 is capable of supplying the material to be carbonized W and includes a drying chamber 5a and a carbonization chamber 5b. The drying chamber 5a and the carbonization chamber 5b are partitioned by a partition wall 5c. The partition wall 5c is a partition fixed to the ceiling part of the container 5 and extending downward. In FIG. 1, the drying chamber 5a is located on the right side of the partition wall 5c, and the carbonization chamber 5b is located on the left side of the partition wall 5c. A communication part 5d through which the drying chamber 5a and the carbonization chamber 5b communicate is formed below the partition wall 5c. The material to be carbonized W is conveyed 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 a number of rollers 9b around which the belt 9a is wound. The belt 9a is in a mesh shape, such as a wire mesh, that can hold the material to be carbonized W and allows 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 the material to be carbonized W transported by the drying chamber belt conveyor 9 and temporarily stores it. 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 to the downstream carbonization chamber belt conveyor (carbonization chamber transport unit) 15 at a predetermined supply speed. When 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 performs solid component analysis of the carbonized material W. The output of the analysis unit AT1 is transmitted 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. When the intermediate hopper 11 and the rotary feeder 13 are omitted, the analysis unit AT1 is installed so that the carbonized material W immediately before being received by the carbonization chamber belt conveyor 15 is analyzed.

[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 transmitted 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, and a part of the upstream side (right type in FIG. 1) extends to the drying chamber 5a. This is to receive the dried carbonized material W from the rotary feeder 13 provided in the drying chamber 5a. The carbonization chamber belt conveyor 15 includes an endless belt 15a and a plurality of rollers 15b around which the belt 15a is wound. The belt 15a is in a mesh shape that can hold the carbonized material W and allows air to flow, and is, for example, a wire mesh. 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 so as to achieve a predetermined drying chamber conveying speed V1.

[0021] The container 5 (carbonization chamber 5b and drying chamber 5a) is provided with a plurality of air supply units (oxidizer supply units) not shown. The air ratio in the container 5 is adjusted by 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 kept in an oxygen-deficient state with an air ratio of, for example, about 0.6 to 0.7, whereby partial combustion of the material to be carbonized W is performed. Carbonization of the material to be carbonized W progresses while it is transported in the direction of the 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 for measuring the temperature of the gas therein. The output of the temperature sensor TX2 is transmitted to the control unit.

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

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

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

[0026] The inside 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 part 5d formed below the partition wall 5c. Drying in the drying chamber 5a is promoted by the heat transferred through the communication part 5d.

[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 of the temperature sensor TX1 is less 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 be controlled only by the temperature sensor TX1 without using the analysis unit AT1.

[0028] The material W to be carbonized that has been transported and dried by the drying chamber belt conveyor 9 is guided to the intermediate hopper 11. The intermediate hopper 11 temporarily stores the material W to be carbonized. 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 to be carbonized stored in the intermediate hopper 11 is supplied to the carbonization chamber belt conveyor 15 by a predetermined amount adjusted by the control unit by the rotary feeder 13. When the intermediate hopper 11 and the rotary feeder 13 are omitted, the material W to be carbonized 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, for example, about 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 decreased 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] In addition, correction may be performed based on the measured value of the temperature sensor TX2 installed in the carbonization chamber 5b. If the temperature measured by the temperature sensor TX2 is lower than the set value, the carbonization chamber transport speed V2 is decreased to lengthen the carbonization time. Note that the carbonization chamber transport speed V2 may be controlled only by the temperature sensor TX2 without using the analysis unit AT2.

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

[0034] The effects of the present embodiment described above are as follows. By individually controlling the drying chamber transport speed V1 and the carbonization chamber transport speed V2, it is possible to control the drying chamber transport speed V1 according to the drying state of the carbonized material W, and to control the carbonization chamber transport speed V2 according to the carbonized state of the carbonized material W. In this way, by appropriately controlling the drying and carbonization of the carbonized material W, it is possible to appropriately manage the process from drying to carbonization of the carbonized material 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, the heat of the carbonization chamber 5b, which is heated to a high temperature, is separated by the partition wall 5c, but is transferred to the drying chamber 5a through the communication section 5d, and the amount of heat required for drying is led to the drying chamber 5a, thereby achieving carbonization with good thermal efficiency.

[0036] An intermediate hopper 11 for temporarily storing the carbonized material W discharged from the drying chamber belt conveyor 9 is provided in the drying chamber 5a. This allows the supply amount and supply timing of the carbonized material W supplied to the carbonization chamber belt conveyor 15 to be different from that of the drying chamber belt conveyor 9, and allows drying and carbonization to be appropriately controlled according to the properties of the carbonized material W. In addition, when using a raw material with a low moisture content and a slow carbonization speed, the moving speed of the drying chamber belt conveyor 9 is controlled to be fast, while the moving speed of the carbonization chamber belt conveyor 15 is controlled to be slow. For this reason, there is a possibility that the raw material will be excessively supplied from the drying chamber 5a to the carbonization chamber 5b, and the carbonized material W may block the outlet of the carbonization chamber 5b. In such a case, the intermediate hopper 11 can be provided to prevent the carbonized material W from blocking the outlet of the carbonization chamber 5b.

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

[0038] The carbonization state of the material W to be carbonized 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, so that appropriate carbonization can be performed.

[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 alone to control the drying chamber transport speed V1 and the carbonization chamber transport speed V2, or may be combined with the above-mentioned analysis units AT1 and AT2 and / or temperature sensors TX1 and TX2 to control them.

[0040] The analysis unit 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 transport 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, methane, and other hydrocarbons in the gas are measured, and the control unit determines the degree 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-mentioned 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 meandering 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 path 5c1 formed in the partition wall 5c in this way, 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. In addition, 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 than the above, such as flowing in from both ends and exhausting from the center.

[0045] <Variation 3> The above-mentioned 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 movable up and down. This allows the area of ​​the communication part 5d to be variable. If the partition wall 5c is positioned upward as in Figure 6(a), the area of ​​the communication part 5d can be increased, and the transfer of heat from the carbonization chamber 5b to the drying chamber 5a can be increased. If the partition wall 5c is positioned downward as in Figure 6(b), the area of ​​the communication part 5d can be reduced, and the transfer of heat from the carbonization chamber 5b to the drying chamber 5a can be reduced.

[0046] The partition wall 5c is moved by 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 portion 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. This makes it possible to adjust the amount of heat transferred between the drying chamber 5a and the carbonizing chamber 5b via the communicating portion 5d, and thus makes it possible to appropriately adjust the temperatures of the drying chamber 5a and the carbonizing chamber 5b.

[0048] <Variation 4> The above-mentioned partition wall 5c can be modified as shown in FIGS. 8(a) and 8(b), the partition wall 5c may be 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 Fig. 8(a), by positioning the partition wall 5c further to the left than in Fig. 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 a case 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 Fig. 8(b), by positioning the partition wall 5c further to the right than in Fig. 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 a case where the capacity to be processed in the carbonization chamber 5b is larger than the capacity to be processed in the drying chamber 5a, such as when the demand for product coal W1 is high.

[0051] The movement of the partition wall 5c is performed by a command from the control unit. FIG. 9 is an enlarged view of part C in FIG. 8, showing a 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 in the horizontal direction 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 communicate 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 the heating medium can be generated, for example, by using heat generated in the carbonization chamber 5b.

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

[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 includes a drying chamber (5a) for drying the material to be carbonized (W), a drying chamber transport section (9) provided inside the drying chamber (5a) for transporting 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 transport section (15) provided inside the carbonization chamber (5b) for transporting the material to be carbonized (W) guided from the drying chamber transport section (9), and a control section for individually controlling the transport speed (V1) of the drying chamber transport section (9) and the transport speed (V2) of the carbonization chamber transport section (15).

[0058] By individually 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 between the drying chamber (5a) and the carbonization chamber (5b) there is provided a partition wall (5c) that separates the drying chamber (5a) and the carbonization chamber (5b), and a communication portion (d) that connects these spaces.

[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 is provided. As a result, while the heat in the carbonization chamber, which is heated to a high temperature, is separated by the partition wall, it is transferred to the drying chamber via the communication part, and the amount of heat required for drying is led to the drying chamber, thereby achieving carbonization with good 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. In addition, 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, water vapor, 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 (5c) is movable so that the communicating area at the communicating portion (5d) changes.

[0064] The partition wall is movable so that the communicating area of ​​the communicating part can be changed. This makes it possible to adjust the amount of heat transferred between the drying chamber and the carbonizing chamber via the communicating part, and to appropriately adjust the temperatures of the drying chamber and the carbonizing 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, in any one of the second to fourth aspects, characterized in that the partition (5c) is movable so that the volume ratio between the drying chamber (5a) and the carbonization chamber (5b) separated by the partition (5c) is changed.

[0066] The partition is made movable so that the volume ratio between the drying chamber and the carbonization chamber separated by the partition 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 according to the properties of the material to be carbonized. The movement of the partition is preferably controlled by a control unit.

[0067] The carbonization furnace (1A, 1B) according to a sixth aspect of the present disclosure is, in any one of the first to fifth aspects, provided in the drying chamber (5a) 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 discharged from the drying chamber transport section. This allows the amount and timing of the material to be supplied to the carbonization chamber transport section to be different from that of the drying chamber transport section, making it possible to appropriately control drying and carbonization according to the properties of the material to be carbonized. The supply amount of the material to be carbonized 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, in any one of the first to sixth aspects, is provided in the drying chamber with a measurement unit such as a solid analysis unit (AT1) that performs a component analysis of the material to be carbonized (W) after passing through the drying chamber transport unit (9), and / or a gas analysis unit (AT3) that performs a 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 transport speed (V1) of the drying chamber transport unit (9) based on the results of the measurement unit.

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

[0071] The carbonization furnace (1A, 1B) according to the eighth aspect of the present disclosure, in any one of the first to seventh aspects, is provided with a measurement unit, such as 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 result of the measurement unit.

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

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

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

[0075] 1A,1B Carbonization furnace 3. Vehicle 3a Cargo bed 5 containers 5a Drying room 5b Carbonization chamber 5c Partition wall (bulkhead) 5c1 Flow passage (coolant flow passage) 5c2 horizontal board 5d Communication part 7 Electric heater 9. Drying chamber belt conveyor (drying chamber transport section) 9a Belt 9b Lola 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 / 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 section) 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 unit 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 transport section provided inside the carbonization chamber and transporting the material to be carbonized introduced from the drying chamber transport 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; A carbonization furnace equipped with:

2. 2. The carbonization furnace according to claim 1, further comprising a partition wall between the drying chamber and the carbonization chamber for separating the drying chamber and the carbonization chamber, and a communication part through which these spaces communicate with each other.

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

4. The carbonization furnace according to claim 2 , wherein the partition wall is movable so that a communicating area in the communicating portion is changed.

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

6. 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 a component analysis of the carbonized material after passing through the drying chamber conveying unit, and / or a gas analysis unit that performs a 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 transport speed of the drying chamber transport unit based on the result of the measurement by the measurement unit.

8. As the measurement unit, a solid analysis unit that performs a component analysis of the carbonized material after carbonization in the carbonization chamber, and / or a gas analysis unit that performs a 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 unit 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 transport section provided inside the carbonization chamber and transporting the material to be carbonized introduced from the drying chamber transport section; A method for controlling a carbonization furnace comprising: A method for controlling a carbonization furnace, comprising individually controlling a conveying speed of the drying chamber conveying section and a conveying speed of the carbonization chamber conveying section.

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