JP2007127330A - Cogeneration method and system using carbonization furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cogeneration method and system using a carbonization furnace capable of supplying electric power and thermal energy at the same time, and capable of quickly corresponding to load fluctuation of a demand side. <P>SOLUTION: In the cogeneration system using the carbonization furnace, carbide 23 is manufactured by the carbonization furnace 4 provided next to an asphalt manufacturing plant 40, pyrolysis gas 22 generated by the carbonization furnace is burned in a combustion chamber 5a to produce high temperature combustion gas 21, and steam 27 produced by a boiler 6 from the high temperature combustion gas is used to carry out power generation. The carbonization furnace 4 is an external heating type kiln, it is provided with the gas combustion chamber 5a burning the pyrolysis gas 21 provided by the carbonization furnace to provide the high temperature combustion gas, and a carbide combustion chamber 5b burning the carbide to provide the high temperature combustion gas, and it is composed such that one part of the high temperature combustion gas is branched to produce high temperature air 47 via an air preheater 7, and the high temperature air is supplied to the asphalt manufacturing plant. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a system in which a carbonization furnace is additionally provided in an asphalt production plant, in which a carbide is produced in the carbonization furnace and power generation is performed using a pyrolysis gas generated in the carbonization furnace. The present invention relates to a power generation method and system.

  In general, biomass refers to an organism that can be used as an energy source or an industrial raw material, and various methods for effectively using biomass have been proposed. Examples of biomass include plants, waste wood, agricultural waste, livestock manure, and sewage sludge. Biomass can be pyrolyzed as a useful method that can be converted to high value-added products at low cost. There is a method of producing carbide by gasification. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2005-162542) proposes a facility for producing a carbide by putting dried feces into a rotary kiln type carbonization furnace and carbonizing it. In this facility, carbide or pyrolysis gas is used as a fuel for a hot air generator for drying and carbonizing feces.

In this way, energy efficiency is improved by producing carbide from biomass and recovering thermal energy from exhaust gas generated by carbonization.
Further, in recent years, cogeneration that supplies heat and electric power together in a single system is known as a system that obtains higher overall thermal efficiency. In Patent Document 2 (Japanese Patent Laid-Open No. 2001-241624), wood waste is carbonized to obtain carbide, steam is generated in a boiler using pyrolysis gas generated from a carbonization furnace as fuel, and the steam is A waste incineration plant is disclosed that uses it to generate electricity with a turbine generator to produce power. Thereby, both material recycling and energy recycling can be performed effectively.

  On the other hand, Patent Document 3 (Japanese Patent Laid-Open No. 2003-171909) discloses a method for effectively using exhaust gas generated in a carbonization furnace in an asphalt production plant. This is because a carbonization furnace is installed near the asphalt plant, exhaust gas generated by carbonization is introduced into the dryer of the asphalt plant, and aggregate heat of the asphalt mixture is performed using the thermal energy of the exhaust gas. is there. Thereby, while obtaining a carbide | carbonized_material, the exhaust-gas heat | fever of a carbonization furnace can be utilized effectively for the aggregate heating of an asphalt mixture, and it becomes possible to suppress the burner fuel consumption of a dryer. As an asphalt production plant, as described in, for example, Patent Document 4 (Japanese Patent Application Laid-Open No. 2005-248489), an asphalt mixture is obtained by heating and drying an aggregate having an asphalt film on the surface with a dryer. There are plants to manufacture.

JP 2005-162542 A JP 2001-241624 A JP 2003-171909 A Japanese Patent Laid-Open No. 2005-248489

However, since the carbonization furnace described in Patent Document 3 employs a direct heating method that uses direct self-heating due to partial combustion of the object to be carbonized, if the air cannot be supplied uniformly into the carbonization furnace, Compared to an externally heated carbonization furnace that indirectly heats the inside, carbonization gasification becomes unstable. Therefore, there is a problem that the produced carbide is inhomogeneous and the calorie is relatively low, so that the efficiency is low when used as fuel. Further, the exhaust gas at the outlet of the carbonization furnace may contain harmful components such as heavy metals, and when the exhaust gas is directly introduced into an asphalt production plant, the asphalt may be contaminated with harmful substances.
Further, the carbonization furnace described in Patent Document 2 also employs a carbonization system that utilizes direct self-heating using pyrolysis gas and carbides, so if air cannot be supplied uniformly into the carbonization furnace, There was a problem that carbonization and gasification became unstable compared to a thermal carbonization furnace. Further, the pyrolysis gas contains a tar component, which may be clogged when supplied to the hot stove. Furthermore, there is a concern that the concentration of heavy metals in the exhaust gas increases due to concentration of the volatilized heavy metal components in the dry distillation gas in the system.

Further, the asphalt production plant has a feature that the production amount based on demand has a large fluctuation, and the system described in Patent Document 3 cannot cope with the load fluctuation.
Accordingly, in view of the above-described problems of the prior art, the present invention has an object to provide a cogeneration power generation method and system using a carbonization furnace that can supply electric power and thermal energy at the same time and can quickly respond to load fluctuations at a demand destination. To do.

Therefore, in order to solve such a problem, the present invention manufactures carbide by a carbonization furnace provided in a hot air utilization facility, and burns pyrolysis gas generated in the carbonization furnace in a combustion chamber to generate high-temperature combustion gas. A cogeneration power generation method using a carbonization furnace that generates electric power using high-temperature steam generated in a boiler from the high-temperature combustion gas,
The carbonization furnace is an external heat kiln, and high-temperature air generated by using a part of thermal energy obtained in the carbonization furnace is used in the hot air utilization facility.

According to the present invention, it is possible to produce carbide in a carbonization furnace and to generate electric power used in hot air utilization equipment, so that both material recycling and energy recycling can be effectively performed.
In addition, since a part of the heat energy obtained in the carbonization furnace is supplied to the facility using hot air as high-temperature air, auxiliary fuel during heating in the facility can be reduced, and a system with high thermal efficiency can be obtained. .
At this time, since an externally heated kiln that indirectly heats the inside of the furnace is adopted as the carbonization furnace, impurities are hardly mixed into the pyrolysis gas generated in the carbonization furnace, and the inside of the furnace is uniformly in a low oxygen or oxygen-free state. Therefore, a uniform and high-calorie carbide can be obtained, which is suitable as a fuel for thermal energy.
The hot air utilization facility is preferably an asphalt production plant.

Further, the thermal energy is a high-temperature combustion gas generated by burning the pyrolysis gas and the carbide in the combustion chamber,
The high temperature combustion gas is supplied to the boiler, and part of the high temperature combustion gas is branched to generate the high temperature air via an air preheater.
According to the present invention, since high-temperature combustion gas is generated from carbide and pyrolysis gas and electric power is generated based on the generated high-temperature combustion gas, it is possible to supply the necessary operating power to the hot-air utilization facility and sell it at the same time. Since a part of the combustion gas is used to produce hot air and supply it to the hot air utilization facility, the amount of auxiliary combustion during heating of the aggregate can be reduced.
In addition, since the heat source supplied to the hot air utilization facility is clean high-temperature air generated using sensible heat of the high-temperature combustion gas, for example, when the hot air utilization facility is an asphalt production plant, the asphalt produced in the plant Impurities are not mixed into the product, and high-quality products can be provided.

At this time, it is preferable to control the amount of carbide supplied to the combustion chamber in accordance with the operating condition of the hot air utilization facility to adjust the amount of high-temperature air generated.
In the present invention, since the load fluctuation accompanying the operation status of the hot air utilization facility is configured to be compensated by the stored carbide, it is possible to appropriately supply high-temperature air used in the hot air utilization facility while always supplying a constant power. A stable cogeneration system can be provided. Further, since carbide is used as a fuel to compensate for load fluctuations, stockpiling is extremely easy and safer than when pyrolytic gas is stored.

Further, the thermal energy is finely divided carbide obtained by pulverizing the carbide,
The fine powder carbide is supplied from a powder burner included in the hot air utilization facility and directly burned to generate the high temperature air.
In the present invention, since the produced carbide is in the form of solid carbide when transported to hot air utilization equipment, equipment such as piping is not required and the equipment can be simplified, and the hot air utilization equipment and the carbonization furnace are provided separately. Even if it is a case, it becomes possible to transport thermal energy easily.
Moreover, since the indirect heating type rotary kiln is adopted as the carbonization furnace, a homogeneous and high calorie carbide can be obtained, and a fuel suitable for the heat source of the hot air utilizing equipment can be supplied.
Furthermore, in these inventions, it is preferable that the processed material to be pyrolyzed and gasified in the carbonization furnace is woody biomass. As a result, the amount of fossil fuel used can be reduced, the problem of depletion of resources can be solved, CO ₂ can be reduced, and global warming can be prevented. Further, since it is a woody system, it is possible to produce a carbide with less impurities.

Also, a carbonization furnace for producing carbide is provided in the hot air utilization facility, a combustion chamber for generating a high-temperature combustion gas by burning a pyrolysis gas generated in the carbonization furnace, and high-temperature steam is generated by the high-temperature combustion gas. A cogeneration system using a carbonization furnace comprising a boiler and a power generation facility that generates power using the high-temperature steam,
The carbonization furnace is an externally heated kiln, and the hot air utilization facility is configured to use high-temperature air generated by using a part of thermal energy obtained in the carbonization furnace.
The hot air utilization facility is preferably an asphalt production plant.

The thermal energy is a high-temperature combustion gas generated by burning the pyrolysis gas and the carbide in the combustion chamber,
An air preheater that generates high-temperature air by sensible heat of the high-temperature combustion gas;
A high-temperature combustion gas line for supplying the high-temperature combustion gas to the boiler and branching a part of the high-temperature combustion exhaust gas to supply to the air preheater;
A high-temperature air line that supplies high-temperature air from the air preheater to the hot-air utilization facility.

Furthermore, it has a means to control the carbide | carbonized_material supply amount to the said combustion chamber, It adjusts the production amount of the said high temperature air according to the driving | running condition of the said hot air utilization equipment.
Furthermore, the combustion chamber comprises a gas combustion chamber that generates a high-temperature combustion gas using the pyrolysis gas as a main fuel, and a carbide combustion chamber that generates a high-temperature combustion gas using the carbide as a main fuel, and the hot-air utilization facility The amount of high-temperature combustion gas generated in the carbide combustion chamber is adjusted in accordance with the operating conditions.

Further, the thermal energy is finely divided carbide obtained by pulverizing the carbide,
The hot air utilization facility includes a powder burner for supplying the fine powder carbide, and the high temperature air is generated by directly burning the fine powder carbide supplied from the powder burner.
Moreover, in these inventions, it is preferable to supply woody biomass to the carbide.

As described above, according to the present invention, since a part of the thermal energy obtained in the carbonization furnace is configured to be supplied to hot air utilization equipment such as an asphalt production plant, auxiliary fuel during heating in the hot air utilization equipment can be reduced, It is possible to reduce the fossil fuel used by making the system highly heat efficient, solve the problem of depletion of resources, reduce CO ₂ , and contribute to the prevention of global warming.
In addition, since the present invention employs an externally heated kiln as the carbonization furnace, a clean pyrolysis gas can be obtained in the carbonization furnace, and a homogeneous and high-calorie carbide can be obtained, which is suitable for reusing heat energy. It is.
In addition, because it is configured to compensate for load fluctuations due to operating conditions of hot air utilization equipment with stored carbide, it is possible to supply hot air used in hot air utilization equipment as appropriate while always supplying constant power, A stable cogeneration system can be provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
1 and 2 are overall configuration diagrams of a cogeneration system using a carbonization furnace according to Embodiments 1 and 2 of the present invention, respectively, and FIG. 3 is a schematic diagram showing a carbide supply facility in FIGS. 1 and 2. It is.

  FIG. 1 shows a cogeneration system using a carbonization furnace according to the first embodiment. The system according to the present embodiment includes an asphalt production plant 40, a carbonization furnace 4 provided in the asphalt production plant 40, a gas combustion chamber 5a for burning pyrolysis gas from the carbonization furnace 4, and a carbide combustion chamber 5b for burning carbide. And a boiler 6 that recovers heat from the high-temperature combustion gas, a power generation facility 12 that generates power using high-temperature steam generated by the boiler 6, and a part of the combustion exhaust gas from the gas combustion chamber 5a and the carbide combustion chamber 5b. An air preheater 7 that generates high-temperature air by using it as a main component. In the present embodiment, the asphalt manufacturing plant 40 is configured as an example, but the present invention is not limited thereto, and other hot air utilization facilities may be configured.

The flow of this system will be described together with the specific configuration of each device.
The receiving supply facility 1 is supplied with an object to be pyrolyzed and gasified in the carbonization furnace 4. Examples of materials to be treated include biomass 20 such as plants, waste wood, agricultural waste, livestock manure, sewage sludge and the like. Biomass is preferred.
The biomass 20 supplied from the receiving supply facility 1 is conveyed on the input conveyor 2 and is quantitatively input from the screw feeder 3 into the carbonization furnace 4.
The carbonization furnace 4 is an externally heated rotary kiln that heats the inside of the furnace by indirect heating. The carbonization furnace 4 is a device in which a heating jacket is provided around the furnace and the biomass 20 in the carbonization furnace 3 is heated by circulating a high-temperature combustion gas 21 through the heating jacket. The externally heated rotary kiln can pyrolyze and biomassize biomass with a small amount of fly ash generation. Moreover, since it is an indirect heating type, since the oxygen concentration inside the kiln where biomass stays can be kept at a very low value and uniform heating is possible, high-calorie and uniform carbide 23 is produced. Can do.

The pyrolysis gas 22 generated by carbonization in the carbonization furnace 4 is guided to the gas combustion chamber 5a. In the gas combustion chamber 5 a, the pyrolysis gas 22 is burned while supplying the combustion air 24 to generate the high-temperature combustion gas 21.
At the same time, the carbide 23 produced in the carbonization furnace 4 is guided to the carbide combustion chamber 5b, and the carbide 23 is burned while supplying the combustion air 24 in the same manner as the gas combustion chamber 5a, thereby generating the high-temperature combustion gas 21. The auxiliary combustion 25 is used at the time of raising the temperature of the combustion chamber.
In this embodiment, the pyrolysis gas 22 and the carbide 23 generated in the carbonization furnace 4 are combusted in separate combustion chambers 5a and 5b. However, the present invention is not limited to this. The pyrolysis gas 22 and the carbide 23 may be combusted in the combustion chamber to generate the high-temperature combustion gas 21. The combustion chamber 5a, performs 5b in exhaust gas circulation, to control the combustion chamber exit temperature of the hot combustion gases 21, it is preferable to suppress the NO _x generation in the exhaust gas by slow combustion simultaneously.

  Here, the process until the carbide 23 is supplied from the carbonization furnace 4 to the carbide combustion chamber 5b is shown in FIG. The carbide 23 discharged from the carbonization furnace 4 is transferred while being air-cooled on the cooling conveyor 51 and stored in the carbide hopper 52. The carbide stored in the carbide hopper 52 is appropriately fed to the magnetic separator 53, and foreign substances such as metal are separated and removed by the magnetic separator 53. The carbide from the magnetic separator 53 is supplied to the pulverizer 54, pulverized, and stored in the pulverized carbide hopper 55 as pulverized carbide. The fine carbide stored in the fine carbide hopper 55 is conveyed in a vapor phase to the carbide combustion chamber 5b by a predetermined amount by a predetermined amount feeder 56 and supplied from the powder burner into the combustion chamber 5b.

A part of the high-temperature combustion gas 21 generated in this way is supplied to the heating jacket of the carbonization furnace 4 and used for indirect heating of the carbonization furnace 4.
At least a part of the other high-temperature combustion gas 21 is supplied to the boiler 6, and the boiler 6 generates high-temperature steam 27 using the sensible heat of the high-temperature combustion gas 21. The generated high-temperature steam 27 is guided to the power generation facility 12 provided in the boiler 6 and used for power generation. As the power generation facility 12, a known device that generates electric power by a generator connected to a steam turbine is used. The electric power generated here may be supplied to the other as well as the necessary power for operation of the asphalt manufacturing plant 40.
Moreover, it is preferable to supply a part of high temperature steam produced | generated with the boiler 6 to the carbide | carbonized_material 23, and it utilizes for prevention of a fine particle scattering or cooling.
The exhaust gas after heat recovery in the boiler 6 is introduced into the heater 7, the other low-temperature exhaust gas 35 is heated by heat exchange, and then introduced into the temperature-decreasing tower 8 and cooled by spraying the cooling water 32. The cooled exhaust gas 33 is neutralized with an acid gas such as NO _x and HCl by the supply of slaked lime 34, introduced into the bag filter 9, and dedusted. Fly ash 28 collected by the boiler 6, the heater 7, the temperature reducing tower 8, and the bag filter 9 is processed by a fly ash treatment facility (not shown).

Exhaust gas discharged from the bag filter 9 is cooled and wet-cleaned by the cooling water 36 and the replenishing water 37 in the smoke-washing tower 13 and sprayed with caustic soda 38 to remove SO _x , HCl, and the like. Washed exhaust gases 35, the NO _x is removed by the supply of the ammonia 39 in the denitration reactor 10 after being heated through the heater 7, released into the atmosphere from the chimney 11. A part of the exhaust gas heated by the heater 7 is supplied to the gas combustion chamber 5a or the carbide combustion chamber 5b. In addition, according to the property of exhaust gas, it can also be set as the structure which does not comprise the smoke-washing tower 13, the denitration reaction tower 10, and the heater 7, These apparatus structures can be selected suitably.

On the other hand, at least a part of the high-temperature combustion gas 21 generated by the gas combustion chamber 5 a and the carbide combustion chamber 5 b is supplied to the air preheater 7. In the air preheater 7, high-temperature air 47 is generated by exchanging heat between the air 49 and the high-temperature combustion gas 21. The combustion gas reduced in temperature by heat exchange is fed to the rear stage side of the heater 7 and processed together with other exhaust gas.
The clean high-temperature air 47 generated by the air preheater 7 is supplied to the asphalt manufacturing plant 40 and supplied to a dryer or the like at the plant. In the asphalt production plant 40, fuel 43 such as aggregate 41, air 42 and kerosene is supplied to produce an asphalt product 44 such as asphalt mixture. By using the high temperature air 47 here, the asphalt production plant 40 It becomes possible to reduce the auxiliary combustion. Moreover, since the high temperature air 47 is clean air generated by exchanging the air 49 in the air preheater 7 while using the heat source of the carbonization furnace 4, impurities are mixed into the manufactured asphalt product. No high quality products can be manufactured.

  In the present embodiment, the boiler 6 and the power generation facility 12 can stably supply power by using the high-temperature combustion gas 21 generated in the gas combustion chamber 5a and the carbide combustion chamber 5b. Moreover, according to the operating condition of the asphalt manufacturing plant 40, while controlling the flow volume of the high-temperature combustion exhaust gas 46 branched to the air preheater 7, the supply amount of the carbide 23 to the carbide combustion chamber 5b is also controlled accordingly, The production amount of the high temperature combustion exhaust gas 21 is adjusted. Thereby, the high temperature air 47 according to the driving | running condition in the asphalt manufacturing plant 40 can be produced | generated rapidly. That is, in this embodiment, since the load fluctuation accompanying the operation status of the asphalt production plant 40 is covered by the carbide 23 stored in the hopper, the high temperature used in the asphalt production plant 40 while always supplying constant power. The air 47 can be appropriately supplied, and a stable cogeneration system can be provided. Moreover, since the carbide | carbonized_material 23 is used as a fuel which supplements load fluctuation | variation, compared with the case where thermal decomposition gas is stored, stockpiling is very easy and safe.

FIG. 2 shows a cogeneration system using a carbonization furnace according to the second embodiment. In the second embodiment, detailed description of the same configuration as that of the first embodiment will be omitted.
The system according to the present embodiment includes an asphalt production plant 40, a carbonization furnace 4 provided in the asphalt production plant 40, a gas combustion chamber 5a for combusting pyrolysis gas from the carbonization furnace 4 to generate high-temperature combustion gas, and a high temperature A boiler 6 that recovers heat from the combustion gas and a power generation facility 12 that generates power using high-temperature steam generated by the boiler 6 are mainly configured.
The second embodiment is different from the first embodiment in that the carbide 23 produced in the carbonization furnace 4 is used as an alternative to the fossil fuel used in the asphalt production plant 40. Accordingly, the carbide combustion chamber 5b for burning the carbide 23 to generate the high-temperature combustion gas and the air preheater 7 for generating the high-temperature air 47 are not provided, and the pyrolysis gas 22 from the carbonization furnace 4 is disposed in the gas combustion chamber 5a. The high-temperature combustion gas 21 generated by burning is used only for indirect heating of the carbonization furnace 4 or high-temperature steam generation in the boiler 6.

The carbide 23 is transported to the asphalt production plant 40 as fine carbide 23 through the process shown in FIG. 3, and is supplied from a powder burner provided in a dryer or the like in the plant and directly combusted to be used as a heat source for asphalt heating. .
According to the present embodiment, since it is transported as a solid carbide 23, facilities such as piping can be simplified, and even if the asphalt production plant 40 and the carbonization furnace 4 are provided apart from each other, it is easy. It is possible to transport the heat source to
In addition, since an indirect heating type rotary kiln is employed as the carbonization furnace 4, a homogeneous and high-calorie carbide 23 can be obtained, and a fuel suitable for the heat source of the asphalt production plant 40 can be supplied.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram of the cogeneration system by the carbonization furnace based on Example 1 of this invention. It is a whole block diagram of the cogeneration system by the carbonization furnace which concerns on Example 2 of this invention. It is the schematic which shows the carbide | carbonized_material supply equipment in FIG.1 and FIG.2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 Carbonization furnace 5a Gas combustion chamber 5b Carbide combustion chamber 6 Boiler 7 Exhaust gas heater 8 Temperature reduction tower 9 Bag filter 10 Denitration reaction tower 12 Power generation equipment 20 Biomass 21 High temperature combustion gas 22 Pyrolysis gas 23 Carbide 27 High temperature steam 40 Asphalt production plant 44 Asphalt products 46 High-temperature combustion gas 47 High-temperature air 52 Carbide hopper 53 Magnetic separator 54 Pulverizer 55 Fine carbide hopper 56 Fixed feeder

Claims (13)

High-temperature combustion gas is produced by a carbonization furnace provided in the hot air utilization facility, and pyrolysis gas generated in the carbonization furnace is combusted in a combustion chamber to generate high-temperature combustion gas. A cogeneration method using a carbonization furnace that generates power using steam,
The carbonization furnace is an externally heated kiln, and high-temperature air generated by using a part of the thermal energy obtained in the carbonization furnace is used in the hot air utilization facility, and the cogeneration power generation by the carbonization furnace Method.   2. The cogeneration power generation method using a carbonization furnace according to claim 1, wherein the hot air utilization facility is an asphalt production plant. The thermal energy is a high-temperature combustion gas generated by burning the pyrolysis gas and the carbide in the combustion chamber,
3. The carbonization furnace according to claim 1, wherein the high-temperature combustion gas is supplied to the boiler, and a part of the high-temperature combustion gas is branched to generate the high-temperature air via an air preheater. Cogeneration method.   4. The carbonization furnace according to claim 1, wherein an amount of carbide supplied to the combustion chamber is controlled in accordance with an operation state of the hot air utilization facility to adjust a generation amount of the high-temperature air. 5. Cogeneration method. The thermal energy is finely divided carbide obtained by pulverizing the carbide,
3. The cogeneration power generation method using a carbonization furnace according to claim 1, wherein the fine powder carbide is supplied from a powder burner provided in the hot air utilization facility and directly burned to generate the high temperature air.   The cogeneration power generation method using a carbonization furnace according to any one of claims 1 to 5, wherein woody biomass is supplied to the carbonization furnace. A carbonization furnace for producing carbide is provided in the hot air utilization facility, a combustion chamber for generating high-temperature combustion gas by burning pyrolysis gas generated in the carbonization furnace, a boiler for generating high-temperature steam from the high-temperature combustion gas, A cogeneration system using a carbonization furnace equipped with a power generation facility that generates power using the high-temperature steam,
By the carbonization furnace, wherein the carbonization furnace is an external heating kiln, and the hot air utilization facility is configured to use high-temperature air generated by using a part of thermal energy obtained in the carbonization furnace. Cogeneration system.   The cogeneration system using a carbonization furnace according to claim 7, wherein the hot air utilization facility is an asphalt manufacturing plant. The thermal energy is a high-temperature combustion gas generated by burning the pyrolysis gas and the carbide in the combustion chamber,
An air preheater that generates the high-temperature air by sensible heat of the high-temperature combustion gas;
A high-temperature combustion gas line for supplying the high-temperature combustion gas to the boiler and branching a part of the high-temperature combustion exhaust gas to supply to the air preheater;
The cogeneration system using a carbonization furnace according to claim 7 or 8, further comprising a high-temperature air line for supplying high-temperature air from the air preheater to the hot-air utilization facility.   The cogeneration power generation by a carbonization furnace according to claim 9, further comprising means for controlling a supply amount of carbide to the combustion chamber, and adjusting a generation amount of the high-temperature air according to an operation state of the hot air utilization facility. system.   The combustion chamber is composed of a gas combustion chamber that generates a high-temperature combustion gas using the pyrolysis gas as a main fuel, and a carbide combustion chamber that generates a high-temperature combustion gas using the carbide as a main fuel, and the operation status of the hot-air utilization facility The cogeneration system using a carbonization furnace according to claim 7 or 8, wherein the amount of high-temperature combustion gas generated in the carbide combustion chamber is adjusted according to the conditions. The thermal energy is finely divided carbide obtained by pulverizing the carbide,
The said hot air utilization equipment is equipped with the powder burner which supplies the said fine powder carbide, The fine powder carbide supplied from this powder burner is directly burned, and the said high temperature air is produced | generated. Cogeneration system with carbonization furnace. The cogeneration system using a carbonization furnace according to any one of claims 7 to 12, wherein a woody biomass is supplied to the carbide.

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