JP2002285168A - Method for producing charcoal at high temperature and apparatus for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and apparatus for efficiently producing charcoal at a high temperature, having good quality with high surface activity suitable for environment clean-up materials, carbon material sources. SOLUTION: This method for producing charcoal at a high temperature is to detect the temperature of the central part of the material to be treated 21 by a thermocouple 22, carry out carbonization treatments by bringing the detected temperature of the central part to have predetermined characteristics of temperature changes in a drying process, a thermal decomposition process, a charcoal process, a carbonization and refining process and a forced cooling process, respectively, while introduce the exhaust gas of a smoke and air and steam during the carbonization and refining process to carry out a producer gas-generating reaction and a water gas-generating reaction and introduce a large amount of the combustible gas to circulate in a carbonization furnace 2 to carbonize at a high temperature. The cooling time of charcoal is brought to be shorten by repeatedly feeding a cooling gas to the carbonization furnace during the forced cooling process to bring the temperature of the material to be treated to about 150 deg.C, then, spray cooling water into the carbonization furnace from a nozzle 65 to bring the cooling velocity to be fast while feeding the cooling gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of processing waste wood, virgin wood, bamboo, wood-based materials such as resin-containing wood composites, refuse solid fuel (RDF), biomass, and the like as raw materials (processed materials). The present invention relates to a high-temperature charcoal production method and a high-temperature charcoal production apparatus for producing high-quality high-temperature charcoal charcoal.

[0002]

2. Description of the Related Art Conventionally, a carbonization method for producing charcoal includes a method of supplying a combustion exhaust gas of a fuel such as a fossil fuel into a carbonization furnace and performing a carbonization treatment, or a method of performing a cooling process after the carbonization treatment outside the carbonization furnace. It is known to omit the time required for the cooling step in the carbonization furnace (for example, see Japanese Patent Application Laid-Open No. 122191/1990 and Japanese Patent No. 2785108).

[0003]

However, in the above-mentioned conventional method for producing charcoal, the adjustment or control of the carbonization temperature in the carbonization furnace is performed by detecting the atmosphere temperature in the carbonization furnace and performing the adjustment based on this atmosphere temperature. Therefore, even if the above-mentioned ambient temperature can be brought close to the set temperature suitable for each step of the carbonization process, the temperature of the material itself to be carbonized (the temperature of the central part of the material to be processed) ) Is far from the set temperature due to the heat insulation of the object to be treated.

[0004] In particular, in the drying process in the early stage of the temperature rise, the temperature of the object to be processed itself is much farther away from the set temperature than the set temperature, and the temperature of the object to be processed is lower than the set temperature in the subsequent temperature rise process. Will be delayed. Further, in the carbonization and refining process, the temperature in the charcoal layer is higher than the temperature of the extra-layer atmosphere due to heat storage. For this reason, the quality of the carbonized charcoal was significantly different from the quality at the expected temperature.

[0005] Here, the quality of charcoal varies greatly depending on the carbonization treatment temperature. Therefore, in order to produce good quality charcoal, it is very important to control the heating temperature of the object to be carbonized, not the above ambient temperature.

Moreover, in order to produce good quality charcoal, it is necessary to perform various treatment steps under appropriate temperature conditions according to each reaction phenomenon until the material to be treated is changed from a raw material state to good quality charcoal.

In recent years, the use of charcoal as an alternative to expensive coconut shell activated carbon and the like as an environmental purification material has been increasing, and furthermore, its use as a carbon material for electronic parts and heat-resistant parts has attracted attention. At the same time, there has been a strong demand for improvements in quality and functions. For this purpose, it has been necessary to produce high-temperature carbonized charcoal of unprecedented quality by performing high-temperature carbonizing treatment on charcoal in an inexpensive manner in an energy-saving manner.

In the conventional heating method in the production of charcoal, an object to be treated is heated with a combustion gas of a fuel material such as waste material while avoiding the use of fossil fuels in order to be economical. However, with this combustion gas, the thermal power is weak and the heating rate is slow,
In addition, the maximum temperature reached is limited to about 700 ° C., and there is a problem that a desired high-temperature carbonized charcoal cannot be obtained.

In the high-temperature carbonization method in which air is introduced into a carbonization furnace to partially burn the material to be treated and raise the temperature, the temperature of the material to be treated and the portion of charcoal are rapidly increased due to a local sharp rise in temperature. Cracking and incineration will impair the quality of charcoal.

On the other hand, when wood and bamboo having a high water content of about 60% (wet base) are to be treated, the time required for the drying step of the treated object generally depends on the entire processing step excluding the cooling step. Occupies a large ratio of 30% or more of the time required. Furthermore, if this drying step is not carried out gradually, it will have a significant effect on the appearance quality of the charcoal, such as the formation of significant cracks in the charcoal and bamboo charcoal and the non-uniform carbonization.

Further, if the high-temperature object to be treated is taken out of the furnace for cooling after completion of the carbonization treatment, it is explosively spontaneously ignited by contact with the oxygen of the outside air. It will be cooled naturally as it is. Then, because the carbonization furnace itself is highly insulated,
The temperature drops very slowly, for example, spending more than three days, making it unsuitable for industrial production of charcoal. On the other hand, if it is rapidly cooled by any means, a remarkable crack is generated due to a sudden shrinkage, which may lead to a deterioration in the quality of charcoal.

The present invention has been made in view of such circumstances, and it is an object of the present invention to control the temperature of the object to be treated and to perform the carbonization treatment, unlike the conventional method of producing charcoal and bamboo charcoal. Energy-saving and efficient to generate a large amount of high-calorie flammable gas in the carbonization process and to perform carbonization with the high-temperature combustion gas obtained by burning the exhaust gas containing the gas. It is an object of the present invention to provide a high-temperature charcoal production method and a high-temperature charcoal production device. Another object is to efficiently produce high-performance charcoal and bamboo charcoal.

[0013]

In order to achieve the above object, the present invention firstly divides the temperature into appropriate processing steps set at appropriate temperature conditions and manages the temperature conditions by controlling the temperature of the object to be processed itself. Secondly, it is necessary to circulate and introduce the combustion exhaust gas of the exhaust gas containing the combustible gas generated in each processing step into the carbonization furnace, particularly in the high-temperature carbonization processing. Needs to actively generate high-calorie flammable gas in the carbonization furnace, and burn the flammable gas outside the carbonization furnace, and recirculate and introduce high-temperature combustion exhaust gas into the carbonization furnace. Third, focusing on the need to efficiently and uniformly cool the high-temperature charcoal layer in the carbonization furnace without reducing the quality of the charcoal, to reduce the time required for cooling time. It was done.

More specifically, the first aspect of the first invention relating to the method for producing high-temperature charcoal is to fill and store a material to be treated, which is a raw material of charcoal and bamboo charcoal, in a carbonization furnace, and to store the material in the carbonization furnace. A carbonization method for introducing and subjecting combustion exhaust gas obtained by burning a combustion product in a primary combustion chamber (referred to as a combustion chamber), and a carbonization process, and includes a carbonization process, that is, a combustible gas generated by thermal decomposition of an object to be processed. The flue gas containing combustible gas generated by the exhaust gas and the combustible gas generated by the active gasification reaction is burned in a secondary combustion chamber (smoke combustion chamber) at a temperature of 800 ° C. or higher, and the combustion flue gas is obtained in a carbonization furnace. High-temperature charcoal production method of producing charcoal and bamboo charcoal by circulation into
After the drying step of evaporating water on the object to be treated, the pyrolysis step of performing pyrolysis by the start of thermal degradation, the wood carbonization step of wood carbonization, and the carbonization and refining steps are sequentially performed. And performing a cooling step. In addition, while detecting the internal temperature of the object to be processed, the supply amount of the combustion exhaust gas and the air is changed and adjusted so that the detected internal temperature exhibits a change characteristic specified below in each of the processing steps. Is also a specific matter. That is, in the above-mentioned drying process, the room temperature or the ambient temperature
The temperature is raised to a temperature range of
C. to a temperature of about 110.degree. C. for a predetermined time, and in the pyrolysis step, a temperature of about 400.degree.
Temperature range, and in the wood carbonization step,
Maintaining a temperature range of 00 ° C. to about 550 ° C. for a predetermined time, raising the temperature in the carbonization and refining process from the temperature range of about 400 ° C. to about 550 ° C. to a predetermined temperature of about 600 ° C. to 1200 ° C., Further, a predetermined temperature in a temperature range of about 600 ° C. to 1200 ° C. is maintained for a predetermined time.

A second aspect of the first invention relating to the method for producing high-temperature charcoal is that, in the drying step, air is introduced to burn a combustion target in a combustion chamber, and the combustion exhaust gas and a target in a carbonization furnace are burned. Heating and drying the object by directly contacting the object to be processed, and the combustion exhaust gas of the object to be burned containing the dried moisture exiting the carbonization furnace is further reburned in a smoke combustion chamber to 800 ° C. or higher, and partially or entirely The combustion exhaust gas is circulated and introduced into a carbonization furnace to be used for heating and drying the object to be treated, and further, in the stages from the pyrolysis step and the wood carbonization step to the carbonization and refining, heat generated in these steps is used. Exhaust gas containing cracked gas is burned in a smoke combustion chamber at 800 ° C or higher, and a part or all of this flue gas is circulated into a carbonization furnace and brought into direct or indirect contact with the object to be treated. 400 ° C
Heating to about 700 ° C. is a particular matter.

Further, in a stage from the end of the above-mentioned carbonization step to the above-mentioned carbonization and refining step, an appropriate amount of air is introduced into the carbonization furnace together with the combustion exhaust gas of the object to be burned, so that a part of the object to be processed is introduced. Is burned to raise the temperature, and the generated flue gas is led to a smoke combustion chamber and reburned at 800 ° C. or higher. A part or all of the combustion exhaust gas generated at this time is circulated and introduced into the carbonization furnace and brought into direct or indirect contact with the object to be processed, and the object to be processed is heated from about 700 ° C. to a predetermined carbonization and refining temperature, for example, 800 ° C. Heating to a target temperature in the range of 1200 ° C. is specified.

Further, when the temperature of the object to be treated reaches about 850 ° C. in the carbonization and refining step, an appropriate amount of air is further intermittently or continuously introduced into the carbonization furnace to make the object and the object to be treated coexist. Contacting air, aggressively causing a gasification reaction of the furnace with air and the material to be treated (carbon) in the carbonization furnace to generate a large amount of combustible gas containing carbon monoxide, and Exhaust gas containing gas is led to the smoke combustion chamber for combustion, and a part or all of the generated exhaust gas is circulated and introduced into the carbonization furnace to make direct or indirect contact with the object to be processed, and the object to be processed is a maximum of 1200 ° C. Heating and raising the temperature to a certain degree is a particular matter.

Still further, the temperature of the object to be treated is 850 ° C.
In the above cases, an appropriate amount of steam is intermittently or continuously introduced together with an appropriate amount of air into the carbonization furnace, and a water gasification reaction is actively performed together with the gasification reaction of the furnace, thereby producing a large amount of carbon monoxide and hydrogen. And the generation of flammable gas containing a small amount of methane, and furthermore, the exhaust gas containing these flammable gases is led to a smoke combustion chamber for combustion,
A specific matter is that part or all of this combustion exhaust gas is circulated into a carbonization furnace and heated or heated to a maximum of about 1200 ° C. by directly or indirectly contacting the object to be treated. It is.

Further, the first method relating to the high-temperature carbonized charcoal production method is as follows.
A third aspect of the present invention resides in that in the cooling step, the object to be treated in the carbonization furnace is indirectly or directly forcibly cooled to lower the temperature of the object to be treated faster than natural cooling. Indirect cooling is a specific matter that the wall of the carbonization furnace filled with the object to be treated is cooled with a cooling gas to gradually lower the temperature of the object to be treated, and in the cooling step, Direct cooling refers to repeatedly supplying a cooling gas containing no oxygen into a carbonization furnace filled with the object to be processed and bringing the same into direct contact with the object to be processed to gradually lower the temperature of the object to be processed. Is a specific matter.

Further, in any of the indirect or direct forced cooling in the cooling step, together with the forced cooling, the internal temperature of the object is reduced to about 150 ° C., and then the object is cooled. The internal temperature of the workpiece is reduced to a temperature at which the workpiece does not ignite spontaneously even if it comes into contact with the outside air by repeatedly and intermittently spraying cooling water introduced from outside the carbonization furnace. Is a specific matter.

Further, a second invention relating to a high-temperature charcoal production apparatus for carrying out the first invention is characterized in that a carbonization furnace for filling and containing an object to be treated as a raw material and an integral or independent construction with the carbonization furnace A combustion exhaust gas supply means (also referred to as a primary combustion means) for burning a substance to be burned and supplying combustion exhaust gas generated by the combustion into the carbonization furnace; and a combustion exhaust gas amount for changing and adjusting a supply amount of the combustion exhaust gas. Supply adjusting means, an object temperature detecting means for detecting an internal temperature of the object itself, and a preset change in which the detected internal temperature detected by the object temperature detecting means is set in advance according to the processing step. Supply amount changing control means for controlling the operation of the combustion exhaust gas amount supply adjusting means so as to change based on characteristics; smoke cooling means for forcibly cooling smoke generated from the carbonization furnace; Smoke-combustion means for burning smoke and combustible gas exiting, steam-generating means for producing steam by the heat of the combustion exhaust gas leaving the smoke-combustion means, and forced air supply for forcibly cooling the object to be treated with a cooling gas Means,
Water supply means for forcibly cooling the object to be treated with water, smoke combustion exhaust gas amount introduction adjustment means for changing and adjusting the circulating introduction amount of combustion exhaust gas leaving the smoke combustion means, and steam for changing and adjusting the supply amount of the steam And a quantity supply adjusting means.

[0022]

As described above, according to the first invention relating to the method for producing high-temperature charcoal and the second invention relating to the apparatus for producing high-temperature charcoal, wood-based materials such as wood and bamboo can be used in an energy-saving manner. Since high-temperature carbonization and activation treatment can be performed efficiently, it is of much better quality than conventional charcoal and bamboo charcoal, and is inexpensive, high-quality, high-performance and surface-active suitable for environmental purification materials and carbon materials. Carbides such as high-temperature charcoal and high-temperature bamboo charcoal can be efficiently and industrially produced.

Specifically, each of the processes of pyrolysis, carbonization, carbonization, and refining in which the temperature conditions are set based on the temperature change characteristics corresponding to the physical and chemical changes of the wood and bamboo materials during the heating process Through the process and by controlling the heating temperature based on the detected value of the internal temperature of the object to be treated, it is possible to reliably obtain the initially set quality charcoal and bamboo charcoal. Furthermore, by causing a gasification reaction and a water gasification reaction of the generator by introducing air and water vapor in the process of carbonization and refining, a special fuel such as a fossil fuel can be obtained without newly adding one.
A high temperature of about 200 ° C. is obtained, and an activation process based on the activation characteristics of air and steam is performed at the same time, thereby producing high-quality, high-performance, high-activity high-temperature carbonized charcoal and bamboo charcoal. be able to.

Further, the time of the cooling step can be reduced by gradually and indirectly or directly forcibly cooling the object without causing cracks in the object. In particular, from the low temperature stage where the temperature of the object reaches about 200 ° C. to about 100 ° C., the cooling rate is remarkably reduced.
When the temperature reaches 0 ° C., the amount of heat of the object to be treated is also removed as latent heat of steam by using intermittent cooling water spray, and the cooling time is greatly reduced to about １ ／ to の of the conventional time. Shortening can be achieved, and productivity can be significantly improved.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a high-temperature charcoal producing apparatus according to an embodiment of the present invention.
The combustion exhaust gas supply means 4 supplies the combustion exhaust gas generated by burning the combustion object to the carbonization furnace 2, and the smoke generated by carbonization of the processing object in the carbonization furnace 2 and the combustion exhaust gas after the carbonization processing is completed. Cooling means for cooling gas used for forced cooling of the processed material,
Numeral 5 denotes smoke (including pyrolysis gas) generated in the carbonization furnace 2 and not cooled by the smoke cooling means 4 and smoke combusting means for combustible gas generated by the gasification reaction. Steam generating means for exchanging heat with the discharged flue gas to generate steam, 7 means for supplying cooling water to be supplied into the carbonizing furnace 2, and 8 means for forcedly supplying cooling gas to be supplied into the carbonizing furnace 2 , 9 is an operation of a combustion exhaust gas amount supply adjusting means for the purpose of controlling combustion of an object to be burned and an air supply amount necessary for a gasification reaction, and an adjustment means for introducing a combustion exhaust gas amount of smoke circulated into the carbonization furnace 2. And the operation of the means for adjusting the supply of water vapor for the water vapor necessary for the water gasification reaction.

The carbonization furnace 2 is constituted by a heat insulating material wall 20 at the periphery, and can accommodate an object 21 to be processed. A plurality of thermocouples 22 serving as temperature detection means are attached to the inside of the workpiece 21, and a plurality of thermocouples 22 are provided outside the carbonization furnace 2 through an outlet (not shown) provided on a wall surface of an arbitrary position of the carbonization furnace 2. It has been taken out. In the carbonization furnace 2, a combustion exhaust gas supply port 23 for heating the workpiece 21 is provided at an upper portion of the carbonization furnace 2, and the combustion exhaust gas used for heating the workpiece 21 and the combustion exhaust gas are generated from the workpiece 21 in the carbonization process. A discharge port 24 for discharging the smoke is provided at a lower portion of the carbonization furnace 2. here,
When the flue gas supply port 23 is provided at the lower part of the carbonization furnace 2, the discharge port 24 of the combustion flue gas and the smoke is provided at the upper part of the carbonization furnace 2.

The combustion exhaust gas supply means 3 includes a refractory wall 30
And a combustion chamber 3 in which a combustion target 31 is accommodated.
2, and an input port (not shown) for inputting the object to be burned 31 into the combustion chamber 32 are provided. Further, a blower 33 for supplying combustion air for the material to be burned to be supplied to the combustion chamber 32 and gasification air to be supplied to the carbonization furnace 2 is provided at a lower portion of the combustion exhaust gas supply means 3. A supply adjusting means (damper) 34 is provided.

A flue gas supply pipe 35 connected to the flue gas supply port 23 of the carbonization furnace 2 is provided above the combustion flue gas supply means 3, and a backflow of gas and cooling gas from inside the carbonization furnace 2. Is provided.

The smoke cooling means 4 is composed of a number of water cooling pipes 41, and the lower part of the smoke cooling means 4 is connected to a gas and smoke discharge port 24 and a duct 25 installed at the lower part of the carbonization furnace 2. It is connected. Further, a water pump 42 for supplying water for cooling the outer wall surface of the water cooling pipe 41 is provided at the center of the smoke cooling means 4.

A cooling water pipe 43 and a valve 44 are provided above the smoke cooling means 4. The cooling water pipe 43 becomes a branch pipe 45 via a joint and is connected to the steam generating means 6.

A duct 46 for discharging the gas and smoke cooled by the smoke cooling means 4 is provided above the smoke cooling means 4. It is connected to the. The above duct 46
Is a branch duct 47 via a joint, and a damper 48 is attached.

The smoke burning means 5 is constituted by a steel container 50 having a heat insulating material adhered inside, and the lower part of the smoke burning means 5 is supplied with air necessary for burning smoke and combustible gas. Blower 51 is installed. Fossil fuel is used to ignite the smoke and combustible gas.

A duct 52 for discharging combustion exhaust gas is provided above the smoke combustion means 5, and the duct 52 is connected to the inside of the steam generator 6. A damper 53 is attached to the duct 52.

The duct 52 becomes a branch duct 54 through a joint, and a smoke combustion exhaust gas amount introduction adjusting means (damper) 55 is attached. The branch duct 54 is connected to the branch duct 47 via a joint to form a duct 56, and a check valve 57 is installed in the duct 56.

Further, the duct 56 is branched into a duct 561 and a duct 563 via a joint, and a damper 562 and a damper 564 are provided respectively. The duct 561 is connected to the flue gas supply port 23 of the carbonization furnace 2.

The steam generating means 6 has a safety valve 61 and a heat exchange device 62 for converting hot water fed from the branch pipe 45 into steam inside the safety valve 61. The heat exchange device 62 is a steam pipe 63. It is connected to the.

The end of the steam pipe 63 is inserted into the carbonization furnace 2, and a spray nozzle 65 is installed at the end. In the middle of the steam pipe 63, a steam amount supply adjusting means (valve) 6 is provided.
4 are attached.

The water supply means 7 comprises a water pump 71, a pipe 72, and a valve 73. The pipe 72 is connected to the steam pipe 63 via a joint.

The cooling gas forced air supply means 8 includes a cooling gas container 81, a valve 82, a blower 83, and a damper 84, which are connected by a pipe 85.

Further, the pipe 8 of the forced air supply means 8
5 is connected to the duct 563 via a joint. The end of the pipe is inserted into the carbonization furnace 2 and is open.

The supply amount change control means 9 is connected to the thermocouple 22 and the compensating conductor 91 installed on the object 21 in the carbonization furnace 2 and detects the internal temperature of the object. The control signal obtained is sent to operating devices such as combustion exhaust gas supply means 3, smoke cooling means 4, smoke combustion means 5, steam generation means 6, water supply means 7, and forced air supply means 8 (not shown). ).

Hereinafter, each carbonization process and the control corresponding thereto will be described.

FIG. 2 shows an example of the set change characteristics of the total carbonization process according to the embodiment of the present invention, and includes the drying process, the pyrolysis process, the wood carbonization process, the carbonization / refining process, and the forced cooling process. The relationship between each process and the change in the internal temperature of the object to be processed is shown with respect to the elapsed time. In FIG. 2, the temperature change in the case of natural cooling is indicated by a dotted line for comparison.

A method of high-temperature carbonization based on the setting change characteristics shown in FIG. 2 and a method of controlling the same will be described for a case where the material to be processed is a wooden log.

The workpiece 21 is filled in the carbonization furnace 2, and thermocouples 22 are mounted at a plurality of predetermined positions. Next, the thermocouple 22 and the compensating lead wire 91 are connected, and connected to a supply amount change control means 9 installed outside the carbonization furnace through a thermocouple outlet (not shown). Next, an appropriate amount of a piece of wood or a piece of wood as the material to be burned 31 is put into the combustion chamber 32. Thereafter, the burnable object 31 is ignited manually or the like. After the ignition, the burnable object 31 is burned while sending air to the combustion chamber 32 by the blower 33 to generate combustion exhaust gas. The combustion exhaust gas is sent into the carbonization furnace 2 through the combustion exhaust gas supply pipe 35, and heats the workpiece 21 in the carbonization furnace to increase the temperature. The workpiece 21 gradually rises in temperature from, for example, an outside air temperature of about 20 ° C. as shown in FIG. At this time, the detected internal temperature of the object to be processed 21 is set to, for example, 100 ° C., and the amount of air supplied from the blower 33 is adjusted by controlling the opening degree of the damper 34 or the motor of the blower 33 by an inverter so as to maintain this temperature. Control by the number of rotations. By doing so, the amount of combustion of the object to be burned 31 is controlled to control the amount of generated combustion exhaust gas, and thus the internal temperature of the object to be processed 21 is controlled. Workpiece 2
The internal temperature of No. 1 keeps maintaining around 100 ° C. during the evaporation of water. For example, the object 21 has a water content of 60%.
About 10 cm to 15 cm diameter cedar wood, 1
If the temperature is kept at 00 ° C. for about 24 hours, the water evaporation is almost completed. Therefore, it is only necessary to supply the amount of heat corresponding to the amount of water evaporation of the processing object 21, and a drying step with extremely high energy efficiency is achieved.

In the drying step, the evaporated moisture of the material to be treated 21 and the combustion exhaust gas of the material to be combusted 31 pass through a smoke discharge duct 25 connected to a smoke discharge port 24 of the carbonization furnace 2, and pass through the smoke cooling means 4.
Is sent to the inside of the water cooling pipe 41. Here, the evaporated water and the combustion exhaust gas are cooled by the water sent by the water pump 42 to generate a condensate. The condensate is discharged to the outside by opening the valve 49 appropriately.

The smoke which is not condensed by the smoke cooling means 4 is sent to the smoke burning means 5 through the duct 46. If this smoke does not contain a combustible gas but may contain an object to be burned or a malodorous component generated from the object to be treated, the smoke is burned by the smoke burning means 5 at a temperature of 800 ° C. or more. In this process, fossil fuel such as kerosene or LPG gas is appropriately supplied, and combustion air is sent by the blower 51 to be processed.

The flue gas generated by the combustion of the smoke by the smoke combustion means 5 is discharged to the atmosphere through a duct 52. At this time, the dampers 48, 53, 53
5. By operating the damper 562 and the damper 564, a part of the combustion gas is circulated and introduced into the carbonization furnace 2.

A specific operation for forcibly circulating a part of the flue gas generated by the smoke combustion means 5 is as follows: the damper 48, the damper 564, and the damper 84 are completely closed, and the damper 562 is completely opened. , The opening degree of the damper 53 and the damper 55 is adjusted. By doing so, a part of the flue gas generated by the smoke combustion means 5 is supplied into the carbonization furnace 2 through the duct 52, the duct 54, the duct 56, the check valve 57 and the duct 561, and
1 used for heating.

When the drying step is completed, the internal temperature of the object 21 gradually rises to about 130 ° C. When the temperature reaches around this temperature, thermal decomposition of the article to be treated 21 begins to occur, and the internal temperature starts to rise rapidly (thermal decomposition of wood is an exothermic reaction). Until the temperature of about 550 ° C. from the start of the pyrolysis step to the end of the carbonization step, smoke containing combustible gas is actively generated. This smoke is treated by the smoke cooling means 4 and the smoke burning means 5 in the same manner as in the drying step, and part of the flue gas leaving the smoke burning means 5 is subjected to the same operation as in the drying step. It is circulated and supplied into the carbonization furnace 2 and used for heating the workpiece 21.

From the pyrolysis process to the wood carbonization process, the smoke contained in the wood carbonization process contains a large amount of effective wood decomposition components, and most of the smoke is converted into condensate by the smoke cooling means 4. This condensed liquid is recovered as vinegar by opening the valve 49 appropriately.

The temperature at which the carbonizing step is completed is generally about 550 ° C., but the temperature distribution becomes non-uniform due to the variation in the material properties of the object to be processed 21, and is lower than the detected internal temperature. The workpiece 21 that has only reached the temperature
May be present. In this case, the internal detection temperature may be raised to 600 ° C. or 700 ° C. for convenience.

When the wood carbonization step is completed, the generation of the pyrolysis gas stops, and the process proceeds to the carbonization and refining step. In this step, the amount of air supplied by the blower 33 and the damper 34 of the combustion exhaust gas supply means 4 is increased,
In addition to increasing the amount of combustion of 1, the object 21 (which is charcoal) in the carbonization furnace 2 is burned. At this time, the flue gas discharged from the carbonization furnace 2 is treated by the smoke cooling means 4 and the smoke combustion means 5 in the same manner as in the drying step, the pyrolysis step and the wood carbonization step, and the smoke combustion means A part of the combustion exhaust gas exiting 5 is circulated and supplied into the carbonization furnace 2 by the same operation and used for heating the object 21 to be treated.

By doing so, the object 2
1 rises to about 800 ° C. The main reaction occurring in the carbonizing furnace 2 in this process is as shown in equation (1), and the temperature of the article to be treated 21 continues to rise to about 850 ° C.

Further, the air is intermittently or continuously supplied by the blower 33 and the damper 34 to cause a gasification reaction between the object 21 and the air in the carbonization furnace 2 to generate a large amount of combustible gas. Gas is generated. The main reaction in this process is as shown in equations (2) and (3), and the amount of combustible gas generated is proportional to the amount of supplied air.

The combustible gas generated by the above formulas (2) and (3) is not burned in the carbonization furnace 2 due to the lack of air and is not burned due to the drying step, the thermal decomposition step, and the wood carbonization step. Similarly, it is sent to the smoke combustion means 5 via the smoke cooling means 4. In the smoke combustion means 5, sufficient air is supplied by the blower 51 to burn combustible gas to produce high-temperature combustion exhaust gas. A part of the combustion exhaust gas is circulated and supplied into the carbonization furnace 2 by the same operation to be used for heating the object 21, and the temperature of the object 21 is 1200 max.
° C.

Also, while supplying an appropriate amount of air intermittently or continuously by the blower 33 and the damper 34, an appropriate amount of steam generated by the steam generating means 6 is supplied into the carbonization furnace 2, An aqueous gasification reaction is caused together with the gasification reaction of the generator to generate a large amount of combustible gas. The main reaction in this process is as shown in the above formulas (2) and (3) and the following formulas (4) and (5).

The above equations (2), (3) and (4), (5)
The combustible gas generated in the above is not burned in the carbonization furnace 2 due to the lack of air, and passes through the smoke cooling means 4 in the same manner as in the drying step, the pyrolysis step and the wood carbonization step. It is sent to the combustion means 5. The combustible gas is burned in the smoke combustion means 5 to produce high-temperature flue gas, and a part of the flue gas is subjected to the same operation as in the carbonization furnace 2.
The temperature of the object 21 can reach a maximum of 1200 ° C. by being circulated and supplied for heating the high temperature carbonization of the object 21.

The steam is supplied from the hot water supplied through the branch pipe 45 of the cooling water pipe 43 provided in the smoke cooling means 4 to the heat exchange device 62 of the steam generating means 6.
It is generated by being heated by a part of the flue gas discharged from the duct 52 and the damper 53 of the smoke combustion means 5.

The steam is supplied to the steam pipe 63.
Then, the target to be processed 21 in the carbonization furnace 2 is sprayed from the spray nozzle 65 through the valve 64. At this time, the valve 73 of the water supply means 7 is closed.

The carbonization and refining step is achieved by supplying an appropriate amount of air and steam and maintaining the high temperature for a predetermined time. In the carbonization and refining process, the material to be treated comes into contact with air and carbon dioxide gas or water vapor in a high-temperature atmosphere, so that it is further activated, and the charcoal or bamboo charcoal with high adsorptivity and high activity is obtained. Become.

The carbonization and refining process is completed as described above, and then the forced cooling process is started.

After the completion of the carbonization and refining treatment, the temperature of the heat-insulating material wall surface 20 and the object to be treated 21 of the carbonization furnace 2 becomes high at a predetermined temperature in a temperature range of, for example, 1000 ° C. to 1200 ° C. I have. Therefore, the low-temperature cooling gas is supplied from above or below the processing object 21 by the forced air supply means 8, so that the thermal energy of the heat insulating material wall and the processing object is transferred to the cooling gas. The temperature of the object to be processed will decrease accordingly. The cooling gas whose temperature has been increased by obtaining thermal energy exits the smoke discharge port 24 and passes through the duct 25 to the water cooling pipe 4 of the smoke cooling means 4.
1 is sent inside.

The cooling gas is an inert gas containing no oxygen, for example, high-purity nitrogen gas, combustion exhaust gas, or the like. These are stored in a cooling gas container 81. The cooling gas is appropriately supplied to the forced air supply means 8 by opening a valve 81.

The heat energy of the cooling gas sent into the water cooling pipe 41 transfers to the cooling water existing around the water cooling pipe 41, so that the temperature of the cooling gas drops accordingly.

The cooling gas exiting the smoke cooling means 4 is supplied to the duct 46, branch duct 47, damper 48, duct 56, check valve 57, duct 563, blower 83 and damper 84.
And is forcibly circulated and supplied into the carbonization furnace 2. At this time, in order to prevent the escape of the cooling gas, the damper 53,
The damper 55 and the damper 562 are completely closed.

In order to prevent the cooling gas sent into the carbonization furnace 2 from flowing backward through the flue gas supply pipe 35 and entering the combustion chamber 32, the damper 36 must be closed.

In some cases, pulverized coal, ash, and the like are simultaneously carried out when passing through the article to be processed 21. Therefore, pulverized coal separation means (for example, a cyclone)
May be provided to separate coal, ash, etc. from the cooling gas (not shown).

The temperature of the processing object 21 is forcibly cooled from the inside by repeatedly sending the cooling gas into the carbonization furnace 2 by the above-mentioned forced air sending means 8, so that the temperature of the object to be processed 21 is lower than that of the natural cooling from the outside. The cooling rate is significantly increased. The internal temperature of the object to be processed 21 is detected and managed by the attached thermocouple 22, and until the temperature reaches about 150 ° C.
Cooling gas is repeatedly sent into the carbonization furnace.

The internal temperature of the object 21 is about 150 ° C.
, Then the water pump 71 of the water supply means 7
Thus, water is sprayed intermittently from the spray nozzle 65 over the workpiece 21 for several seconds. At this time, the heat energy of the processing target 21 is consumed as the sensible heat and latent heat of evaporation of the sprayed water, and the temperature of the processing target 21 decreases accordingly.

The water sprayed by the water pump 81 becomes steam, and the steam exits through the smoke outlet 24 together with the cooling gas circulated and supplied into the carbonization furnace 2, and is again cooled by the smoke cooling. Sent to the means 4. The water vapor is cooled by the cooling means 4 and becomes condensed water, which is taken out by opening and closing the valve 49 as appropriate, stored in a water storage means (not shown), and circulated for use.

<Another Embodiment> FIG. 2 shows a high-temperature charcoal production apparatus according to another embodiment of the present invention.
Is different from the high-temperature charcoal producing apparatus according to the embodiment of the present invention shown in FIG.
And all of the flue gas of the smoke leaving the smoke combustion means 5 is circulated and introduced into the carbonization furnace 2 through the duct 52, and a part of the flue gas is branched into the branch duct 56 of the duct 561.
3 and the damper 564, is circulated and introduced into the appropriate gap 202, and the smoke and flue gas passing through the appropriate gap 202 is discharged through the outlet 241, the duct 521, and That is, it is released to the atmosphere via the steam generating means 6.

FIG. 3 shows the container 201 in the high-temperature charcoal production apparatus shown in FIG. 2, and is made of a heat-resistant metal. The above-mentioned container has an inlet 201a, an inlet 201 for water vapor and water, through which the combustion exhaust gas of the object 31 and the combustion exhaust gas of the smoke and the cooling gas of the object 21 can be cooled.
b, outlet 2 for smoke and gas exiting inside the container 201
01c, and an outlet 201d of the thermocouple 91, respectively.
A door 201e and a lattice plate 201f on which the object 21 is placed are attached so that the filling and taking out of 1 can be easily performed. The combustion exhaust gas flows from the upper portion to the lower portion of the object 21 to heat the object, passes through the grid of the grid plate 201f, and is discharged to the outside of the carbonization furnace through the smoke and gas discharge ports 201c.

<Other Embodiments> It should be noted that the present invention is not limited to the above-described embodiments, but includes various other embodiments. That is, in the above embodiment, the carbonization furnace 2 and the combustion chamber 3 are separately provided, but may be integrated with the carbonization furnace. Further, a cooling device different from the smoke cooling means 4 may be used for forced cooling of the cooling gas used for cooling the processing object 21. In any case, the concept is the same as in the above embodiment.

Further, the combustion air taken into the combustion chamber 32 may be taken in by the suction action (draft effect) of the blower 51 of the smoke combustion means 5 instead of the forced air supply of the blower 33. The suction air at this time may be supplied to another air suction port (not shown) provided in the lower part of the combustion chamber 32.
At this time, the amount of sucked air is adjusted by the number of revolutions of the blower 51 by inverter control.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a high-temperature charcoal producing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 2 Carbonization furnace 3 Combustion exhaust gas supply means 4 Smoke cooling means 5 Smoke combustion means 6 Steam generation means 7 Water supply means 8 Forced air supply means for cooling gas 9 Supply change control means 20 Wall surface 21 Workpiece 22 Thermocouple 32 Combustion chamber 33 Blower 65 Spray nozzle for water vapor and water

FIG. 2 is an explanatory view showing a high-temperature charcoal producing apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 2 Carbonization furnace 3 Combustion exhaust gas supply means 4 Smoke cooling means 5 Smoke combustion means 6 Steam generation means 7 Water supply means 8 Forced air supply means for cooling gas 9 Supply amount change control means 201 Sealed container

FIG. 3 is an explanatory view showing a closed container of a high-temperature charcoal production apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 201a Inlet for flue gas and cooling gas 201b Inlet for steam and water 201e Door 201f Grid plate

FIG. 4 shows an example of a setting change characteristic of a total carbonization process according to an embodiment of the present invention, and shows a change in internal temperature of an object to be processed with respect to an elapsed time.

Claims (24)

[Claims] 1. A charcoal furnace is filled with a wood-based material such as wood and bamboo, which is a raw material of charcoal, and is supplied with combustion exhaust gas, air and steam of the material to be burned into the carbonization furnace. A high-temperature charcoal production method for producing charcoal at high temperature; a drying step of evaporating water on the object to be treated; a pyrolysis step of performing thermal decomposition by starting thermal degradation of wood or bamboo; A high-temperature charcoal production method in which a carbonizing step, a carbonizing and refining step, and a subsequent forced cooling step are performed consistently. 2. The method for producing high-temperature charcoal according to claim 1, wherein all of the processing steps are performed while detecting an internal temperature of the object to be processed, and the detected internal temperature is determined as follows in each of the processing steps. ) A high-temperature charcoal production method in which the amount of heating of the object to be treated is changed and adjusted so as to change as in (e) to (e). (A) In the drying step, the temperature of the object to be treated, which is substantially the same as the room temperature or the outside air temperature, is raised to a temperature range of about 50 ° C. to 110 ° C., and this temperature range is maintained for a predetermined time. In the process, after the drying process is completed, about 400
C. to a temperature range of about 550 ° C., (c) in the wood carbonization step, the above-mentioned about 400 ° C. to about 550 ° C.
(D) In the carbonization and refining step, the above-mentioned temperature range of about 400 ° C to about 5 ° C is maintained.
The temperature is raised from a temperature range of 50 ° C. to a temperature range of about 600 ° C. to about 1200 ° C .;
A predetermined temperature in a temperature range of 200 ° C. is maintained for a predetermined time. 3. The method for producing high-temperature charcoal according to claim 2, wherein in the drying step of heating and drying the object to be treated by bringing the exhaust gas of the object to be contacted into direct contact with the object to be treated. The flue gas of the object to be burned containing the dry moisture of the object to be treated is led to a smoke combustion chamber provided separately from the carbonization furnace,
Reheated to 800 ° C. or higher, and a part or all of the generated flue gas is circulated and introduced into the carbonization furnace and brought into direct or indirect contact with the object to be heated and dried. High temperature charcoal making method. 4. The high-temperature charcoal production method according to claim 2, wherein in the stage from the pyrolysis step and the carbonization step to the carbonization / refining step, a pyrolysis gas of the object to be processed generated. The flue gas of the above-mentioned burned material including the above is guided to the above-mentioned smoke combustion chamber and re-burned at 800 ° C. or higher. Alternatively, a method for producing high-temperature charcoal in which an object is heated to about 400 ° C. to about 700 ° C. by indirect contact. 5. The high-temperature charcoal production method according to claim 2, wherein an appropriate amount of air is introduced into the carbonization furnace in a stage from the end of the carbonization step to the carbonization and refining step. A part of the object is burned, and the generated combustion exhaust gas of the object is guided to the smoke combustion chamber at 800 ° C.
A part or all of the combustion exhaust gas obtained by recombustion is circulated and introduced into a carbonization furnace and brought into direct contact or indirect contact with the object to be treated.
A method for producing high-temperature charcoal in which the temperature is raised to or maintained at a predetermined carbonization / refining temperature of 0 ° C. 6. The high-temperature charcoal production method according to claim 5, wherein in the carbonization and refining step from the end of the carbonization step, when the temperature of the object reaches about 850 ° C., the carbonization is performed. An appropriate amount of air is intermittently or continuously introduced into the furnace for an appropriate period of time to cause a gasification reaction of the generator into the carbonization furnace to generate a large amount of combustible gas containing carbon monoxide. High-temperature charcoal in which exhaust gas containing gas is guided to the above-mentioned smoke combustion chamber and recombusted, and part or all of the obtained exhaust gas is circulated and introduced into a carbonization furnace to make direct or indirect contact with an object to be treated. Production method. 7. The high-temperature charcoal production method according to claim 5, wherein in the carbonization and refining step from the end of the carbonization step, when the temperature of the object to be treated is 750 ° C. or more, the carbonization furnace is placed in the carbonization furnace. A suitable amount of water and an appropriate amount of steam are introduced intermittently or continuously for an appropriate amount of time, and a water gasification reaction is actively performed together with the above-described gasification reaction of the reactor. The combustible gas containing the combustible gas is generated, and the exhaust gas containing the combustible gas is guided to the smoke combustion chamber to be recombusted. A part or all of the obtained combustion exhaust gas is circulated and introduced into the carbonization furnace to be treated. A method for producing high-temperature charcoal that is brought into direct or indirect contact with an object. 8. The method for producing high-temperature charcoal according to claim 1, wherein in the cooling step, the object to be treated in the carbonization furnace is indirectly or directly forcibly cooled to naturally reduce the temperature of the object to be treated. A high-temperature charcoal production method that makes it faster than cooling. 9. The method for producing high-temperature charcoal according to claim 8, wherein in the cooling step, indirect cooling refers to cooling the wall surface of the carbonization furnace filled with the object to be treated by using a cooling gas to cool the charcoal. A method for producing high-temperature charcoal by lowering the temperature of a treated material. 10. The method for producing high-temperature charcoal according to claim 8, wherein in the cooling step, the direct cooling is a process of repeatedly supplying a cooling gas containing no oxygen into a carbonization furnace filled with the object to be treated. A high-temperature charcoal production method wherein the temperature of the object is lowered by directly contacting the object. 11. The method for producing high-temperature charcoal according to claim 8, wherein in the cooling step, the internal temperature of the object to be treated is about 1%.
When the temperature of the object is lowered to 50 ° C., the object is sprayed with cooling water introduced from the outside of the carbonization furnace so that the object does not ignite spontaneously even when the object comes into contact with outside air. High-temperature charcoal production method that lowers the internal temperature of the coal. 12. A carbonization furnace for charging and containing an object to be treated as a raw material of charcoal, and an integrated or independent carbonization furnace, which burns the object to be burned and generates combustion exhaust gas generated by the combustion. Combustion exhaust gas supply means for supplying into the furnace; combustion exhaust gas amount supply adjustment means for changing and adjusting the supply amount of the combustion exhaust gas; processing object temperature detection means for detecting the internal temperature of the processing object itself; Supply amount change control means for controlling the operation of the combustion exhaust gas amount supply adjustment means such that the detected internal temperature detected by the processing object temperature detection means changes based on a preset change characteristic set in advance according to the processing step; A smoke cooling means for forcibly cooling smoke generated from the carbonization furnace, a smoke combustion means for burning smoke and flammable gas exiting the smoke cooling means, and a heat of flue gas discharged from the smoke combustion means. A steam generating means for generating more steam, a forced air supply means for forcibly cooling the object to be treated with a cooling gas, a water supply means for forcibly cooling the object to be treated with water, and a flue gas leaving the smoke burning means A high-temperature charcoal production apparatus, comprising: a smoke combustion exhaust gas amount introduction adjusting means for changing and adjusting the circulation introduction amount of water; and a steam amount supply adjusting means for changing and adjusting the steam supply amount. 13. The high-temperature charcoal production apparatus according to claim 12, wherein the treatment step includes a drying step of evaporating water on the object to be treated, and a pyrolysis step of performing thermal decomposition by starting thermal degradation. After the carbonization step of carbonizing the wood and the carbonization and refining steps of carbonizing and refining are sequentially performed, the cooling step is performed, and the setting change characteristic is the indoor temperature or the outside air temperature in the drying step. Approximately 50
C. to 110.degree. C. and maintain this temperature range for a predetermined time. In the pyrolysis step, the temperature is raised from the temperature range of about 50.degree. C. to about 110.degree. C. to the temperature range of about 400.degree. C. to about 550.degree. In the above wood carbonization step, the above 400 ° C.
A temperature range of about 550 ° C. to about 550 ° C. is maintained for a predetermined time, and in the carbonization and refining step, the temperature is raised from the temperature range of about 400 ° C. to about 550 ° C. to a predetermined temperature of about 600 ° C. to about 1200 ° C. A high-temperature charcoal manufacturing apparatus for maintaining a predetermined temperature in a temperature range of about 600 ° C. to about 1200 ° C. for a predetermined time. 14. The high-temperature charcoal producing apparatus according to claim 12, wherein in the drying step of heating and drying the object to be processed by bringing the combustion exhaust gas of the object to be directly contacted with the object to be processed, The flue gas of the burned material containing the dried moisture of the treated material is led to a smoke combustion chamber provided separately from the carbonization furnace,
Reheated to 800 ° C. or higher, and a part or all of the generated flue gas is circulated and introduced into the carbonization furnace and brought into direct or indirect contact with the object to be heated and dried. High temperature charcoal production equipment that is composed. 15. The high-temperature charcoal production apparatus according to claim 12, wherein in the stage from the pyrolysis step and the carbonization step to the carbonization and refining step, a pyrolysis gas of the object to be processed generated. The flue gas of the above-mentioned burned material including the above is guided to the above-mentioned smoke combustion chamber and re-burned at 800 ° C. or higher. Alternatively, a high-temperature charcoal production method configured to heat the object to be treated at about 400 ° C. to about 700 ° C. by indirect contact. 16. The high-temperature charcoal production apparatus according to claim 12, wherein an appropriate amount of air is introduced into the carbonization furnace in a stage from the end of the carbonization step to the carbonization and refining step. A part of the object is burned, and the generated combustion exhaust gas of the object is guided to the smoke combustion chamber at 800 ° C.
A part or all of the combustion exhaust gas obtained by recombustion is circulated and introduced into a carbonization furnace and brought into direct contact or indirect contact with the object to be treated.
A high-temperature charcoal production apparatus configured to heat or raise the temperature to a predetermined carbonization / refining temperature of 0 ° C. 17. The high-temperature charcoal production apparatus according to claim 16, wherein in the carbonization / refining step from the end of the carbonization step, when the temperature of the object reaches about 850 ° C., the carbonization is performed. An appropriate amount of air is intermittently or continuously introduced into the furnace for an appropriate period of time to cause a gasification reaction of the generator into the carbonization furnace to generate a large amount of combustible gas containing carbon monoxide. The flue gas containing gas is guided to the smoke combustion chamber and reburned, and a part or all of the obtained flue gas is circulated and introduced into the carbonization furnace to directly or indirectly contact the object to be treated. High temperature charcoal making equipment. 18. The high-temperature charcoal production apparatus according to claim 16, wherein in the carbonization and refining step from the end of the carbonization step, when the temperature of the object to be treated is 750 ° C. or more, the apparatus is placed in a carbonization furnace. A suitable amount of water and an appropriate amount of steam are introduced intermittently or continuously for an appropriate amount of time, and a water gasification reaction is actively performed together with the above-described gasification reaction of the reactor, so that a large amount of carbon monoxide and hydrogen and a small amount of methane are added. The combustible gas containing the combustible gas is generated, and the exhaust gas containing the combustible gas is guided to the smoke combustion chamber to be recombusted. A part or all of the obtained combustion exhaust gas is circulated and introduced into the carbonization furnace to be treated. High-temperature charcoal production equipment configured to make direct or indirect contact with objects. 19. The high-temperature charcoal production apparatus according to claim 12, wherein the combustion exhaust gas supply means includes: a combustion chamber for burning a substance to be burned; and a blower for supplying combustion air to the combustion chamber. A high-temperature charcoal manufacturing apparatus, wherein the combustion exhaust gas amount supply adjusting means is configured to change and adjust the supply amount of combustion air by the blower. 20. The high-temperature charcoal production apparatus according to claim 12, further comprising a storage container for storing the object to be processed in the carbonization furnace, wherein the storage container is provided with the carbonization furnace so that the combustion exhaust gas can pass therethrough. It is installed at an appropriate distance from the inner wall, and on the wall surface of the storage container, an inlet for the combustion exhaust gas and the air, and an inlet for the steam, or the cooling gas and water, and an outlet for the smoke are installed. Charcoal production equipment. 21. The high-temperature charcoal production apparatus according to claim 12, wherein in the cooling step, the object to be treated in the carbonization furnace is indirectly or directly forcibly cooled to naturally reduce the temperature drop of the object to be treated. High-temperature charcoal production equipment configured to perform faster than cooling. 22. The high-temperature charcoal production apparatus according to claim 20, wherein in the cooling step, indirect cooling refers to cooling the wall surface of the carbonization furnace filled with the object to be treated by using a cooling gas and cooling the object. A high-temperature charcoal manufacturing device configured to lower the temperature of the processed material. 23. The high-temperature charcoal production apparatus according to claim 20, wherein in the cooling step, the direct cooling is a step of repeatedly supplying a cooling gas containing no oxygen into a carbonization furnace filled with the object to be processed. A high-temperature charcoal manufacturing apparatus configured to directly contact the object to be processed and to lower the temperature of the object to be processed. 24. The method for producing high-temperature charcoal according to claim 12, wherein in the cooling step, the internal temperature of the object to be processed is about 1%.
When the temperature of the object is lowered to 50 ° C., the object is sprayed with cooling water introduced from the outside of the carbonization furnace so that the object does not ignite spontaneously even when the object comes into contact with outside air. A high-temperature charcoal manufacturing device configured to lower the internal temperature of a charcoal.