Furnace system

Abstract

To provide a furnace system that operates efficiently and stably.SOLUTION: A furnace system 1 comprises: a carbonization section 20 for producing carbonized material using biomass as a raw material; a molten steel section 50 for producing steel using steel scrap as a raw material; and a first heat exchange section 60A for exchanging heat between combustion gas produced in the carbonization section 20 and externally supplied air, wherein the carbonized material produced in the carbonization section 20 is supplied to the molten steel section 50, and the air heat-exchanged in the first heat exchange section 60A is supplied to a desired part.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a furnace system including a carbonization furnace and an electric furnace for melting iron scrap. [Background technology]

[0002] In recent years, systems that combine a carbonization furnace with other functions have become available. Examples of such prior art include the following:

[0003] One example of a biomass power generation system is one that includes a carbonization furnace that carbonizes woody biomass, a pyrolysis furnace that generates pyrolysis gas from the carbonized material and combustion gas obtained in the carbonization furnace, and a power generation device that obtains electricity using water gas obtained by cleaning the pyrolysis gas, and is characterized by having an air supply control unit that controls the amount of air supplied to the carbonization furnace, and supplying combustion gas whose temperature is controlled by the amount of air supplied to the pyrolysis furnace (Patent Document 1).

[0004] The biomass power generation system described in Patent Document 1 utilizes heat by supplying the high-temperature combustion gas generated during the carbonization process to the next process. However, since the gas flowing through the system contains impurities such as soot, tar, ash, and dust, the use of combustion gas can cause clogging and corrosion in various parts of the system.

[0005] As such, systems that have high-temperature equipment are required to not only utilize the thermal energy generated by the equipment in other parts of the system, but also to have a stable mechanism with few problems such as clogging and corrosion. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2017-132969 A Summary of the Invention [Problem to be solved by the invention]

[0007] The problem to be solved by the present invention is to provide a furnace system that operates efficiently and stably. [Means for solving the problem]

[0008] The first invention is a furnace system comprising a carbonization section which uses biomass as a raw material to produce charcoal in a carbonization furnace, a molten steel section which uses iron scrap as a raw material to produce steel in an electric furnace, and a first heat exchange section which exchanges heat between combustion gas generated in the carbonization section and air from the outside, and which supplies the charcoal generated in the carbonization section to the molten steel section and supplies the air heat-exchanged in the first heat exchange section to a desired part of the furnace system. The second invention is the furnace system of the first invention, which preheats the iron scrap with the combustion gas from the first heat exchange section. The third invention is the furnace system of the first or second invention, which is provided with a heat circulation path for circulating and utilizing heat between the carbonization section and the first heat exchange section. The fourth invention is a furnace system including a carbonization section that uses biomass as a raw material to generate carbonized material in a carbonization furnace, a pyrolysis section that uses a pyrolysis furnace to pyrolyze the carbonized material generated in the carbonization section to generate water gas, a molten steel section that uses iron scrap as a raw material to generate steel in an electric furnace, and a first heat exchange section that exchanges heat between the combustion gas generated in the carbonization section and air from the outside, and supplies the water gas generated in the pyrolysis section to the molten steel section and supplies the air that has been heat exchanged in the first heat exchange section to a desired part of the furnace system. The fifth invention is the furnace system of the fourth invention, in which the iron scrap is preheated by the combustion gas from the first heat exchange section. The sixth invention is the furnace system of the fourth or fifth invention, which includes a heat circulation path that circulates heat between the carbonization section and the first heat exchange section. In addition, a seventh invention is a furnace system comprising a carbonization section that uses biomass as a raw material to produce carbonized material in a carbonization furnace, a pyrolysis section that pyrolyzes the carbonized material produced in the carbonization section in a pyrolysis furnace to produce water gas, a molten steel section that uses iron scrap as a raw material to produce steel in an electric furnace, and a first heat exchange section that exchanges heat between the combustion gas generated in the carbonization section and air from the outside, wherein the carbonized material produced in the carbonization section is appropriately supplied to the pyrolysis section and / or the molten steel section, and when the carbonized material is supplied to the pyrolysis section, the water gas generated in the pyrolysis section is supplied to the molten steel section, and the air that has been heat exchanged in the first heat exchange section is supplied to a desired part of the furnace system.The eighth invention is the furnace system of the seventh invention, in which the iron scrap is preheated by the combustion gas from the first heat exchanger. The ninth invention is the furnace system of the seventh or eighth invention, which is provided with a heat circulation path for circulating heat between the carbonization section and the first heat exchanger. The tenth invention is a furnace system, which includes a carbonization section that produces charcoal in a carbonization furnace using biomass as a raw material, a molten steel section that produces steel using an electric furnace using iron scrap as a raw material, and a second heat exchange section that exchanges heat between the combustion gas generated in the molten steel section and air from the outside, and supplies the charcoal produced in the carbonization section to the molten steel section, and supplies the air heat-exchanged in the second heat exchanger to a desired part of the furnace system. The eleventh invention is the furnace system of the tenth invention, in which the iron scrap is preheated by the combustion gas generated in the carbonization section. The twelfth invention is the furnace system of the tenth or eleventh invention, which is provided with a heat circulation path for circulating heat between the carbonization section, the molten steel section, and the second heat exchange section. The thirteenth invention is a furnace system, which includes a carbonization section for producing carbide in a carbonization furnace using biomass as a raw material, a molten steel section for producing steel in an electric furnace using iron scrap as a raw material, a first heat exchange section for exchanging heat between a combustion gas generated in the carbonization section and air from the outside, and a second heat exchange section for exchanging heat between a combustion gas generated in the molten steel section and air from the outside, and supplies the carbide produced in the carbonization section to the molten steel section, and supplies the air heat-exchanged in the first and second heat exchange sections to a desired part of the furnace system. The fourteenth invention is the furnace system of the thirteenth invention, which preheats the iron scrap with the combustion gas from the first heat exchange section. A fifteenth aspect of the present invention is the furnace system according to the thirteenth or fourteenth aspect of the present invention, further comprising a heat circulation path for circulating heat between the carbonization section and the first heat exchange section.A sixteenth aspect of the present invention is a furnace system comprising: a carbonization section for producing carbonized material from biomass in a carbonization furnace; a pyrolysis section for pyrolyzing the carbonized material produced in the carbonization section in a pyrolysis furnace to produce water gas; a molten steel section for producing steel from scrap iron in an electric furnace; a first heat exchange section for exchanging heat between a combustion gas produced in the carbonization section and air from the outside; and a second heat exchange section for exchanging heat between a combustion gas produced in the molten steel section and air from the outside, the furnace system supplying the water gas produced in the pyrolysis section to the molten steel section and supplying the air heat-exchanged in the first and second heat exchange sections to a desired part of the furnace system. A seventeenth aspect of the present invention is the furnace system according to the sixteenth aspect of the present invention, in which the scrap iron is preheated by the combustion gas from the first heat exchange section. An eighteenth invention is a furnace system according to the sixteenth or seventeenth invention, further comprising a heat circulation path for circulating heat between the carbonization section and the first heat exchange section. A 19th invention is a furnace system comprising: a carbonization section for producing carbonized material from biomass in a carbonization furnace; a pyrolysis section for producing water gas by pyrolyzing the carbonized material produced in the carbonization section in a pyrolysis furnace; a molten steel section for producing steel from scrap iron in an electric furnace; a first heat exchange section for exchanging heat between a combustion gas produced in the carbonization section and air from the outside; and a second heat exchange section for exchanging heat between a combustion gas produced in the molten steel section and air from the outside, the furnace system appropriately supplies the carbonized material produced in the carbonization section to the pyrolysis section and / or the molten steel section, supplies the water gas produced in the pyrolysis section to the molten steel section when the carbonized material is supplied to the pyrolysis section, and supplies the air heat-exchanged in the first and second heat exchange sections to a desired part of the furnace system. A 20th invention is the furnace system of the 19th invention, in which the scrap iron is preheated by the combustion gas from the first heat exchange section. A twenty-first invention is a furnace system according to the nineteenth or twentieth invention, further comprising a heat circulation path for circulating heat between the carbonization section and the first heat exchange section. Effect of the Invention

[0009] In the present invention, efficient and stable heat utilization of the furnace system using clean high-temperature air can be expected by exchanging heat between the combustion gas from the carbonization section and air in the heat exchange section. In addition, in the present invention, efficient melting of the iron scrap can be expected by preheating the iron scrap with the combustion gas after heat exchange with air in the heat exchange section. In addition, in the present invention, efficient system utilization can be expected by supplying the carbide generated in the carbonization section to the molten steel section. In addition, in the present invention, efficient system utilization can be expected by supplying the carbide generated in the carbonization section to the pyrolysis section, and further generating water gas and supplying this to the molten steel section. In addition, in the present invention, efficient and stable heat utilization of the furnace system using clean high-temperature air can be expected by exchanging heat between the combustion gas from the molten steel section and air in the heat exchange section, similar to the combustion gas from the carbonization section. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a conceptual diagram of a conventional system. [Diagram 2] FIG. 1 is a schematic diagram of a first embodiment of a furnace system according to the present invention. [Diagram 3] 2 is an example of a device for a heat exchanger according to the present invention. [Figure 4] 1 is an example of an apparatus according to the present invention in which a molten steel section and a preheating section are integrated. [Diagram 5] FIG. 2 is a schematic diagram of a second embodiment of the furnace system according to the present invention. [Figure 6] FIG. 2 is a schematic diagram of a third embodiment of a furnace system according to the present invention. [Figure 7] FIG. 13 is a schematic diagram of a fourth embodiment of the furnace system according to the present invention. [Figure 8] FIG. 13 is a schematic diagram of a fifth embodiment of the furnace system according to the present invention. [Figure 9] FIG. 13 is a schematic diagram of a sixth embodiment of the furnace system according to the present invention. [Figure 10] FIG. 13 is a schematic diagram of a seventh embodiment of the furnace system according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment of a furnace system 1 according to the present invention will be described below.

[0012] <Terminology> The carbonization section is a part that has the function of burning biomass and the like in a carbonization furnace and performing carbonization processing. The molten steel section is a part that has the function of melting scrap iron and the like in an electric furnace and performing steelmaking. The pyrolysis section is a part that has the function of reacting the carbide obtained in the carbonization section with high-temperature steam (called "superheated steam") in a pyrolysis furnace and pyrolyzing the carbide into hydrogen, carbon dioxide, and the like. The superheated steam generation section is a part that has the function of vaporizing water and further increasing the temperature to superheated steam that contributes to the pyrolysis. The heat exchange section is a part that has the function of exchanging the thermal energy of multiple different fluids.

[0013] <System including conventional carbonization furnace> Fig. 1 is a conceptual diagram of a system including a conventional carbonization furnace. The main components of a system including a conventional carbonization furnace are a drying section 10 that dries biomass, a carbonization section 20 that carbonizes the biomass sent from the drying section 10 by combustion, a pyrolysis section 30 that pyrolyzes the carbonized material sent from the carbonization section 20 with superheated steam, and a superheated steam generation section 40 that generates superheated steam from water and sends it to the pyrolysis section 30.

[0014] In the system according to Fig. 1, the combustion gas in the carbonization section 20 and the like is reused as a heat source. That is, the combustion gas in the carbonization section 20 is sent to the pyrolysis section 30 and used as part of the heat source. In addition, the combustion gas in the pyrolysis section 30 is sent to the superheated steam generation section 40 and used as part of the heat source. In addition, the combustion gas in the superheated steam generation section 40 is sent to the drying section 10 and used as part of the heat source.

[0015] <Technologies used in the furnace system according to the present invention> Fig. 2 is a conceptual diagram of a first embodiment of the furnace system 1 according to the present invention. The pyrolysis section 30 and the superheated steam generation section 40 (both of which are omitted in Fig. 2) according to the present invention may use the devices and methods described in JP 2016-121256 A, JP 2017-132676 A, JP 2017-132969 A, etc., or techniques equivalent thereto.

[0016] Furthermore, the molten steel section 50 according to the present invention may be a general electric furnace or one using technology conforming to JP 2009-46726 A, JP 2011-69606 A, JP 2011-226713 A, JP 2012-37157 A, etc. Furthermore, the heating method of the electric furnace is not limited to a resistance furnace, an arc furnace, an induction furnace, etc.

[0017] The same is true for the heat exchanger 60 according to the present invention and the boiler, power generation device, oxygen gas generator, etc. that constitute the furnace system 1 according to the present invention. In this way, the furnace system 1 according to the present invention may be based on the carbonization furnace, electric furnace, pyrolysis furnace, device for generating superheated steam, and heat exchange device described in the above-mentioned documents, and may be improved or otherwise modified as necessary to have the functions necessary to realize the present invention.

[0018] <Biomass supplied to the furnace system according to the present invention> In the embodiment, the biomass input to the furnace system 1 according to the present invention is wood chips with a size of 50 mm or less derived from construction waste. However, the input to the carbonization section 20 of the present invention is not limited to this, and any material may be input as long as it becomes a carbonized material that can be used in the furnace system 1 by combustion.

[0019] Example 1 A first embodiment of the furnace system 1 according to the present invention will be described with reference to Fig. 2. Note that the moisture content of the biomass, the carbonization temperature, etc. are merely examples of system operation, and the operation of the furnace system 1 according to the present invention is not limited to the ranges shown here. In addition, the furnace system 1 according to the present invention may include devices not shown in the figure.

[0020] First, biomass dried to a moisture content of 15% or less in the drying section 10 (omitted from FIG. 2) is supplied to the carbonization section 20. The carbonization section 20 carbonizes the supplied biomass by combustion. The carbonization is controlled by the residence time and temperature. The carbonization temperature in the carbonization section 20 is 400 to 800°C on average, and preferably 500 to 600°C. In the process of carbonizing the biomass, flammable hydrocarbon gases and the like are generated.

[0021] The carbide produced in the carbonization section 20 is supplied to the molten steel section 50 as a recarburizer, with the amount appropriately adjusted. On the other hand, outside air (air) is supplied to the combustible gas, etc., and the combustible gas, etc. is burned up to a predetermined temperature. The combustion temperature of the combustible gas, etc. is 900 to 1300°C. The combustion gas obtained by burning the combustible gas is supplied to the heat exchange section 60 (first heat exchange section 60A) to preheat the raw material (scrap iron) to be supplied to the molten steel section 50.

[0022] The combustion gas supplied to the first heat exchange section 60A exchanges heat with outside air (air) and is then supplied to the preheating section 70 to preheat the iron scrap in the preheating section 70. FIG. 3 shows an example of a heat exchange device that functions as the heat exchange section 60. This heat exchange device has a double tube structure, in which heat is exchanged between a fluid passing through an internal flow path and a fluid passing through a peripheral flow path. However, the heat exchange method is not limited to this, and any form of heat exchange may be used. The preheated iron scrap is supplied to the molten steel section 50.

[0023] In Fig. 2, the preheating section 70 and the molten steel section 50 are shown in a separate form, but they may be integrated as shown in Fig. 4 in which the respective functions are included in one device. Also, as in the combustion gas path in Fig. 4, the combustion gas from the first heat exchange section 60A may be supplied to the preheating region (upper region of the device in Fig. 4) via the molten steel region (lower region of the device in Fig. 4). The heat may be utilized in a desired part of the furnace system 1, or may be discharged to the atmosphere.

[0024] The air that has been heat exchanged with the combustion gas in the first heat exchange section 60A and has become hot is then heat exchanged with water (the portion of the boiler 80 in FIG. 2) and supplied to the carbonization section 20. In this way, a heat circulation system is formed that includes the carbonization section 20, the first heat exchange section 60A, and the boiler 80. This allows fresh, high-temperature air to be constantly supplied to the carbonization section 20.

[0025] The steam generated from the boiler 80 by the above heat exchange is supplied to the power generation device 90 and converted into electricity to operate an oxygen gas generation device (oxygen generation section 100 in FIG. 2) of the PSA type or the like. The oxygen gas generated by the device is supplied to the molten steel section 50 as auxiliary fuel.

[0026] In the molten steel section 50, the preheated iron scrap is melted in an electric furnace with the carbide from the carbonization section 20 as a recarburizing material in an atmosphere of the above-mentioned oxygen gas, and steel is produced. The combustion gas from the molten steel section 50 may be utilized as heat in a desired part of the furnace system 1, or may be released into the atmosphere.

[0027] As described above, in the present invention, clean high-temperature air is generated by heat exchange between the combustion gas from the carbonization section 20 and the air from the outside in the first heat exchange section 60A, enabling stable heat utilization and heat circulation in the furnace system 1. In Fig. 2, the high-temperature air from the first heat exchange section 60A is utilized in the boiler 80. However, the high-temperature air from the first heat exchange section 60A may be utilized in a desired part in the furnace system 1, and any type of heat circulation system may be constructed in the furnace system 1.

[0028] Furthermore, in the first heat exchange section 60A, the combustion gas exchanges heat with the air, thereby lowering the temperature of the combustion gas, and making it possible to use the combustion gas for preheating the iron scrap, etc., in the furnace system 1. In preheating the iron scrap, the combustion gas is heated to a predetermined temperature (for example, 600°C to 800°C), so that the iron scrap can be supplied to the melting section in an appropriate state without fusing together.

[0029] In addition, the biomass-derived combustion gas according to the present invention contains impurities such as SiO2 and CaO. These are also useful secondary materials in the steel molten process. In other words, the system configuration of the present invention allows these substances in the combustion gas to be trapped in the iron scrap before being released into the atmosphere, and allows for the effective use of these substances.

[0030] Example 2 A second embodiment of the furnace system 1 according to the present invention will now be described.

[0031] 5 is a conceptual diagram of a second embodiment of the furnace system 1 according to the present invention. This embodiment differs from the first embodiment of the first embodiment in the presence or absence of a pyrolysis section 30 and in the transport path of the carbide. That is, in the second embodiment, the carbide generated in the carbonization section 20 is supplied to the pyrolysis section 30, and the water gas (described later) generated in the pyrolysis section 30 is supplied to the molten steel section 50. Other than this difference, the basic configuration is the same as that of the first embodiment.

[0032] The carbide supplied to the pyrolysis section 30 reacts (water-gasification reaction, oxidation reaction) with superheated steam (high-temperature water vapor) and oxidant (high-concentration oxygen, oxygen in the air, etc.) supplied from the superheated steam generation section 40 (omitted in FIG. 5). Here, the temperature of the superheated steam generated in the superheated steam generation section 40 is around 800°C, and the water-gasification reaction in the pyrolysis section 30 is 900 to 1200°C. The water-gasification reaction is a reaction in which the carbide (C) reacts with water (H2O) to generate water gas consisting of hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), etc. The water gas is supplied to the molten steel section 50 as an auxiliary fuel.

[0033] New carbides are generated as residues of the water-gasification reaction from the pyrolysis section 30. Although a transport path for the generated carbides is omitted in Fig. 5, the carbides may be supplied to the molten steel section 50 as a recarburizer as necessary.

[0034] In the molten steel section 50, the iron scrap preheated by the electric furnace is melted in the above-mentioned water gas and oxygen gas atmosphere to produce iron. The combustion gas in the molten steel section 50 may be utilized as heat in a desired part of the furnace system 1 or may be released to the atmosphere.

[0035] Example 3 A third embodiment of the furnace system 1 according to the present invention will now be described.

[0036] 6 is a conceptual diagram of a third embodiment of the furnace system 1 according to the present invention. It differs from the second embodiment of the second embodiment in the transport path of the char generated in the carbonization section 20. That is, in the third embodiment, the char generated in the carbonization section 20 is supplied to either the pyrolysis section 30 or the melting section 50 as appropriate, or is supplied to both the pyrolysis section and the melting section. The basic configuration other than this difference is the same as that of the second embodiment.

[0037] The transport of the charcoal generated in the carbonization section 20 may be controlled by any means. For example, route control by a belt conveyor that supplies the charcoal, manual route selection, etc. Transporting the charcoal in this manner allows the furnace system 1 to operate according to the purpose.

[0038] Example 4 A fourth embodiment of the furnace system 1 according to the present invention will now be described.

[0039] 7 is a conceptual diagram of a fourth embodiment of the furnace system 1 according to the present invention. This embodiment differs from the first embodiment of the first embodiment in the arrangement of the heat exchange section 60. That is, in the fourth embodiment, the combustion gas from the molten steel section 50 is heat exchanged with the air in the second heat exchange section 60B.

[0040] The air heated by heat exchange with the combustion gas in the second heat exchange section 60B is heat exchanged with water (the boiler 80 portion in FIG. 7) and supplied to the carbonization section 20. This is similar to the use of the heated air from the first heat exchange section 60A in the first embodiment of the first embodiment.

[0041] In this manner, in the second heat exchange section 60B, clean high-temperature air is generated by heat exchange between the combustion gas from the molten steel section 50 and the air from the outside, enabling stable heat utilization and heat circulation in the furnace system 1.

[0042] 7, the thermal energy of the high-temperature air from the second heat exchange section 60B is utilized in the boiler 80, and then becomes part of the heat source for the carbonization section 20, the preheating section 70, and the molten steel section 50, and then returns to the second heat exchange section 60B. However, the high-temperature air from the second heat exchange section 60B may be utilized for heat in any desired part of the furnace system 1, and any type of heat circulation system may be constructed in the furnace system 1.

[0043] The combustion gas generated in the carbonization section 20 may also be utilized for heat in a desired part of the furnace system 1. For example, it may be supplied to the preheating section 70 after being heated to a predetermined temperature by mixing with outside air or the like.

[0044] Example 5 A fifth embodiment of the furnace system 1 according to the present invention will now be described.

[0045] Fig. 8 is a conceptual diagram of a fifth embodiment of the furnace system 1 according to the present invention. This embodiment differs from the first embodiment of the embodiment in the presence or absence of a second heat exchange section 60B. That is, in the fifth embodiment, the combustion gas from the molten steel section 50 exchanges heat with air in the second heat exchange section 60B.

[0046] In the second heat exchange section 60B, the air is heat-exchanged with the combustion gas, and the heated air is utilized in the furnace system 1. Although details are omitted in Fig. 8, the high-temperature air after heat exchange is supplied to the drying section and utilized for drying the biomass. However, the high-temperature air from the second heat exchange section 60B may be utilized in a desired part of the furnace system 1, and any type of heat circulation system may be constructed in the furnace system 1.

[0047] Example 6 A sixth embodiment of the furnace system 1 according to the present invention will now be described.

[0048] 9 is a conceptual diagram of a sixth embodiment of the furnace system 1 according to the present invention. This embodiment differs from the fifth embodiment of the fifth embodiment in the presence or absence of a pyrolysis section 30 and in the transport path of the carbide. That is, in the sixth embodiment, the carbide generated in the carbonization section 20 is supplied to the pyrolysis section 30. Then, the water gas generated by the water-gasification reaction in the pyrolysis section 30 is supplied to the molten steel section 50 as auxiliary fuel.

[0049] As described above, new carbides are also generated as residues of the water-gasification reaction from the pyrolysis section 30. Although a transport path for the generated carbides is omitted in Fig. 9, the carbides may be supplied to the molten steel section 50 as a recarburizer as necessary.

[0050] Example 7 A seventh embodiment of the furnace system 1 according to the present invention will now be described.

[0051] 10 is a conceptual diagram of a seventh embodiment of the furnace system 1 according to the present invention. It differs from the sixth embodiment of the sixth embodiment in the transfer path of the charcoal generated in the carbonization section 20. The basic configuration other than this difference is the same as that of the sixth embodiment.

[0052] The transport of the charcoal generated in the carbonization section 20 may be controlled by any means. As described above, this may include route control by a belt conveyor that supplies the charcoal, manual route selection, etc. By controlling the transport of the charcoal in this manner, it becomes possible to operate the furnace system 1 according to the purpose.

[0053] The first to seventh embodiments are merely examples, and devices not shown in the figures, such as a device for generating superheated steam for a water-gas reaction, may be incorporated into the heat circulation system. Also, heat may be supplied to another device or system outside the furnace system 1.

[0054] As described above, the present invention realizes a mechanism for exchanging heat between the combustion gas generated in the carbonization section and clean air in the heat exchange section, while at the same time contributing the products such as the combustion gas and carbides after the heat exchange to molten steel from the iron scrap. Therefore, the present invention covers any use of the heat of the fluid in the furnace system and the products based on the configuration of the present invention. In other words, the present invention should not be interpreted based on the name of the device, etc., but should be interpreted flexibly based on the essential functions that constitute the invention. [Industrial Applicability]

[0055] According to the present invention, an efficient and stable furnace system can be constructed by combining a carbonization furnace and an electric furnace. In addition, the thermal energy generated in the furnace system can be combined with devices outside the system or with other systems, enabling further heat utilization. [Explanation of symbols]

[0056] 1. Furnace System 20 Carbonization section 30 Pyrolysis section 50 Molten Steel Section 60A First heat exchange section 60B Second heat exchange section

Claims

1. 1. A furnace system comprising: a carbonization unit that generates carbonized material using biomass as a raw material in a carbonization furnace; A molten steel section that uses scrap iron as raw material to produce steel in an electric furnace; a first heat exchange section for exchanging heat between the combustion gas generated in the carbonization section and air from the outside; Equipped with supplying carbide produced in the carbonization section to the molten steel section; A furnace system that supplies the air that has been heat exchanged in the first heat exchange section to a desired part of the furnace system.

2. 2. The furnace system of claim 1, wherein the ferrous scrap is preheated by combustion gases from the first heat exchange section.

3. The furnace system according to claim 1 or 2, further comprising a heat circulation path for circulating heat between the carbonization section and the first heat exchange section.

4. 1. A furnace system comprising: a carbonization unit that generates carbonized material using biomass as a raw material in a carbonization furnace; a pyrolysis section for pyrolyzing the carbonized material produced in the carbonization section in a pyrolysis furnace to produce water gas; A molten steel section that uses scrap iron as raw material to produce steel in an electric furnace; a first heat exchange section for exchanging heat between the combustion gas generated in the carbonization section and air from the outside; Equipped with supplying the water gas produced in the thermal decomposition section to the molten steel section; A furnace system that supplies the air that has been heat exchanged in the first heat exchange section to a desired part of the furnace system.

5. 5. The furnace system of claim 4, wherein the ferrous scrap is preheated by combustion gases from the first heat exchange section.

6. The furnace system according to claim 4 or 5, further comprising a heat circulation path for circulating heat between the carbonizing section and the first heat exchange section.

7. 1. A furnace system comprising: a carbonization unit that generates carbonized material using biomass as a raw material in a carbonization furnace; a pyrolysis section for pyrolyzing the carbonized material produced in the carbonization section in a pyrolysis furnace to produce water gas; A molten steel section that uses scrap iron as raw material to produce steel in an electric furnace; a first heat exchange section for exchanging heat between the combustion gas generated in the carbonization section and air from the outside; Equipped with supplying the carbide produced in the carbonization section to the pyrolysis section and / or the molten steel section as appropriate; When the carbide is supplied to the thermal decomposition section, water gas generated in the thermal decomposition section is supplied to the molten steel section; A furnace system that supplies the air that has been heat exchanged in the first heat exchange section to a desired part of the furnace system.

8. 8. The furnace system of claim 7, wherein the ferrous scrap is preheated by combustion gases from the first heat exchange section.

9. The furnace system according to claim 7 or 8, further comprising a heat circulation path for circulating heat between the carbonizing section and the first heat exchange section.

10. 1. A furnace system comprising: a carbonization unit that generates carbonized material using biomass as a raw material in a carbonization furnace; A molten steel section that uses scrap iron as raw material to produce steel in an electric furnace; a second heat exchange section for exchanging heat between the combustion gas generated in the molten steel section and air from the outside; Equipped with supplying carbide produced in the carbonization section to the molten steel section; A furnace system that supplies the air that has been heat exchanged in the second heat exchange section to a desired part of the furnace system.

11. The furnace system of claim 10, wherein the iron scrap is preheated by combustion gases generated in the carbonization section.

12. The furnace system according to claim 10 or 11, further comprising a heat circulation path for circulating heat between the carbonization section, the molten steel section, and the second heat exchange section.

13. 1. A furnace system comprising: a carbonization unit that generates carbonized material using biomass as a raw material in a carbonization furnace; A molten steel section that uses scrap iron as raw material to produce steel in an electric furnace; a first heat exchange section for exchanging heat between the combustion gas generated in the carbonization section and air from the outside; a second heat exchange section for exchanging heat between the combustion gas generated in the molten steel section and air from the outside; Equipped with supplying carbide produced in the carbonization section to the molten steel section; A furnace system that supplies air that has been heat exchanged in the first and second heat exchange sections to a desired part of the furnace system.

14. 14. The furnace system of claim 13, wherein the ferrous scrap is preheated by combustion gases from the first heat exchange section.

15. The furnace system according to claim 13 or 14, further comprising a heat circulation path for circulating heat between the carbonization section and the first heat exchange section.

16. 1. A furnace system comprising: a carbonization unit that generates carbonized material using biomass as a raw material in a carbonization furnace; a pyrolysis section for pyrolyzing the carbonized material produced in the carbonization section in a pyrolysis furnace to produce water gas; A molten steel section that uses scrap iron as raw material to produce steel in an electric furnace; a first heat exchange section for exchanging heat between the combustion gas generated in the carbonization section and air from the outside; a second heat exchange section for exchanging heat between the combustion gas generated in the molten steel section and air from the outside; Equipped with supplying the water gas produced in the thermal decomposition section to the molten steel section; A furnace system that supplies air that has been heat exchanged in the first and second heat exchange sections to a desired part of the furnace system.

17. 17. The furnace system of claim 16, wherein the ferrous scrap is preheated by combustion gases from the first heat exchange section.

18. The furnace system according to claim 16 or 17, further comprising a heat circulation path for circulating heat between the carbonization section and the first heat exchange section.

19. 1. A furnace system comprising: a carbonization unit that generates carbonized material using biomass as a raw material in a carbonization furnace; a pyrolysis section for pyrolyzing the carbonized material produced in the carbonization section in a pyrolysis furnace to produce water gas; A molten steel section that uses scrap iron as raw material to produce steel in an electric furnace; a first heat exchange section for exchanging heat between the combustion gas generated in the carbonization section and air from the outside; a second heat exchange section for exchanging heat between the combustion gas generated in the molten steel section and air from the outside; Equipped with supplying the carbide produced in the carbonization section to the pyrolysis section and / or the molten steel section as appropriate; When the carbide is supplied to the thermal decomposition section, water gas generated in the thermal decomposition section is supplied to the molten steel section; A furnace system that supplies air that has been heat exchanged in the first and second heat exchange sections to a desired part of the furnace system.

20. 20. The furnace system of claim 19, wherein the ferrous scrap is preheated by combustion gases from the first heat exchange section.

21. The furnace system according to claim 19 or 20, further comprising a heat circulation path for circulating heat between the carbonization section and the first heat exchange section.

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