Gasification furnace equipment

Abstract

In a state where carbon dioxide (CO2) emissions are suppressed (by reducing carbon-containing substances), This makes it possible to use coal as a raw material. [Solution] Coal as raw material, and water vapor (H2O) or oxygen as a gasifying agent. Using (O2), hydrogen (H2)-rich synthesis gas is produced in the reactor body 1, and the produced synthesis gas The carbon-containing substance contained in the carbon-containing substance is recovered by the carbon-containing substance recovery means 2, and the recovered carbon-containing substance The carbon-containing material is used in method 3 to obtain the product (the carbon-containing material is effectively utilized), Synthesis gas, which has been recovered and whose CO2 emissions have been suppressed, is used as fuel for boiler 4.

Description

Technical Field

[0001] The present invention relates to a gasification furnace facility using coal as a raw material.

Background Art

[0002] Coal exists in a wide area of the world, has a large recoverable reserve, and has a stable price. Therefore, it has high supply stability and a low price per calorific value. Coal is used, for example, as fuel for a power generation boiler (for example, Patent Document 1), and stable supply of electric power is realized by power generation using coal.

[0003] On the other hand, when using fossil fuels, generation of carbon dioxide (CO2) is inevitable at present. For this reason, various measures have been taken to suppress CO2 emissions, such as separating and recovering CO2 and performing isolation treatment. When separating and recovering CO2, for example, thermal energy such as steam for power generation is required, and for CO2 isolation, it is necessary to consider a decrease in power generation output and handling, or to consider a transport route and a storage location.

[0004] As described above, in fact, various contrivances have been made regarding suppression of CO2 emissions, and establishment of a technique for suppressing the energy burden, separating and recovering CO2, and effectively using the separated and recovered CO2 is desired.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] This invention has been made in view of the above circumstances, and aims to provide a gasification furnace system that can use coal as a raw material while suppressing CO2 emissions (by reducing carbon-containing substances). [Means for solving the problem]

[0007] To achieve the above objective, the gasification furnace equipment of the present invention according to claim 1 comprises: a furnace body to which coal and steam (H2O) or oxygen (O2) are supplied at least, and which generates hydrogen (H2)-rich synthesis gas by a gasification reaction; a carbon-containing substance recovery means for recovering carbon-containing substances contained in the generated synthesis gas; a utilization means for obtaining a product using the carbon-containing substances recovered by the carbon-containing substance recovery means; and a combustion means in which the synthesis gas after the carbon-containing substances have been recovered is used as fuel.

[0008] In the present invention according to claim 1, coal is used as a raw material, and steam (H2O) or oxygen (O2) is used as a gasifying agent. By using steam (H2O), the H2 concentration can be increased, and H2-rich synthesis gas is produced in the furnace body. Carbon-containing substances contained in the produced synthesis gas are recovered by a carbon-containing substance recovery means. The recovered carbon-containing substances are used by an utilization means to obtain a product (carbon-containing substances are effectively utilized), and the synthesis gas, in a state where carbon-containing substances are recovered and CO2 emissions are suppressed, is used as fuel for a combustion means.

[0009] Therefore, fuel for combustion methods can be produced using coal, which has a high supply stability and a low price per unit of calorific value, while suppressing carbon dioxide (CO2) emissions (reducing carbon-containing substances). Thus, it becomes possible to use coal as a raw material while suppressing CO2 emissions (reducing carbon-containing substances).

[0010] Furthermore, the furnace body can use carbon resources with high hydrogen content in addition to coal as raw materials to increase the hydrogen concentration in the synthesis gas. For example, low-grade coal (sub-bituminous coal, lignite), woody biomass, herbaceous biomass, waste plastics, waste tires, food waste, and sewage sludge can be used. In addition to steam (H2O) or oxygen (O2), CO2 or air can be used as gasifying agents in the furnace body.

[0011] Furthermore, the gasification furnace equipment of the present invention according to claim 2 is characterized in that, in the gasification furnace equipment described in claim 1, the carbon-containing substance recovery means is a char recovery means that recovers char (unburned carbon components including ash) as the carbon-containing substance using a cyclone, and the utilization means is a means of processing the recovered char in equipment other than the furnace body.

[0012] In the present invention according to claim 2, char is recovered using a cyclone, and the recovered char is used for processing in equipment other than the furnace body (reducing the amount of carbon-containing material). The equipment other than the furnace body may be, for example, an iron ore sintering facility, in which the recovered char is used to perform iron ore sintering and convert it into sintered ore. By performing iron ore sintering, carbon-containing material can be used as a substitute for coke, and the amount of coke consumed can be reduced.

[0013] In addition to sintering in a sintering facility, other means of processing the recovered char in equipment other than the furnace itself include using the char for plowing into fields (agricultural equipment).

[0014] Furthermore, the gasification furnace equipment of the present invention according to claim 3 is characterized in that, in the gasification furnace equipment described in claim 1, the carbon-containing substance recovery means is a soot separation means that recovers soot (such as smoke) as the carbon-containing substance using a separation means (cyclone, filter), and the utilization means is a carbon-containing product manufacturing equipment that manufactures carbon-containing products using the recovered soot (such as smoke).

[0015] In the present invention according to claim 3, soot (such as carbon dioxide) is recovered using a separation means (cyclone, filter), and the recovered soot (such as carbon dioxide) is supplied to a carbon-containing product manufacturing facility to produce carbon-containing products (reducing the amount of carbon-containing material). Rubber manufacturing equipment can be applied as the carbon-containing product manufacturing facility, and rubber products (tire rubber) can be manufactured (reducing the amount of carbon-containing material). Therefore, carbon-containing material can be used as a substitute for carbon black (petroleum product) made from petroleum-derived acetylene, and the consumption of petroleum products can be reduced.

[0016] Furthermore, the gasification furnace equipment of the present invention according to claim 4 is characterized in that, in the gasification furnace equipment described in claim 1, the carbon-containing substance recovery means is a CO2 recovery means that recovers CO2 as the carbon-containing substance using an absorption means (chemical absorption method, physical absorption method), and the utilization means is a storage facility for storing, isolating, and reusing the recovered CO2.

[0017] In the present invention according to claim 4, CO2 is recovered using an absorption means (chemical absorption method, physical absorption method), and the recovered CO2 is stored in a storage facility (such as an underground storage facility) for isolation and reuse (the CO2 is effectively utilized).

[0018] Furthermore, the gasification furnace equipment of the present invention according to claim 5 is characterized in that, in the gasification furnace equipment described in claim 1, the carbon-containing substance recovery means is a chemical synthesis means that performs chemical synthesis using the generated synthesis gas, and the carbon-containing substance recovery means and the utilization means are chemical synthesis means that perform chemical synthesis using the generated synthesis gas to produce a chemical product.

[0019] In the present invention according to claim 5, chemical synthesis is carried out using carbon monoxide (CO) contained in synthesis gas using a chemical synthesis means, and chemical products (e.g., formic acid, oxalic acid) are synthesized (the amount of carbon-containing material can be reduced). For example, when used in the synthesis of oxalic acid, a solid compound is obtained, and carbon can be stored for a long period of time. Furthermore, since CO reacts with water to obtain oxalic acid and H2, the H2 obtained can be used to increase the H2 concentration of the synthesis gas.

[0020] Furthermore, it can be applied to the synthesis of chemical products such as methane, methanol, olefins (FT synthesis), acetic acid, and DME.

[0021] Furthermore, the gasification furnace equipment of the present invention according to claim 6 is characterized in that, in the gasification furnace equipment described in claim 1, the carbon-containing substance recovery means is a separation and reaction means that reacts carbon monoxide (CO) contained in the generated synthesis gas with water vapor (H2O) and recovers carbon dioxide (CO2), and the utilization means is a storage facility for storing, isolating, and reusing the recovered CO2.

[0022] In the present invention according to claim 6, CO2 is recovered by the reaction of CO with water vapor (H2O) using separation and reaction means, and the recovered CO2 is stored in a storage facility (such as an underground storage facility) for isolation and reuse (the CO2 is effectively utilized).

[0023] As a means of separation and reaction, a shift reaction apparatus that reacts CO with water vapor to convert it into H2 and CO2 can be applied. Alternatively, as a means of separation and reaction, a reaction apparatus (membrane reactor) equipped with a membrane that performs separation and chemical reaction can be applied.

[0024] Furthermore, the gasification furnace equipment of the present invention according to claim 7 is characterized in that, in the gasification furnace equipment described in claim 1, it is further equipped with a water electrolysis means for obtaining oxygen (O2) and hydrogen (H2) by electrolysis, the O2 obtained by the water electrolysis means is introduced into the furnace body, and the H2 obtained by the water electrolysis means is introduced into the synthesis gas after the carbon-containing substance has been recovered.

[0025] In the present invention according to claim 7, after the carbon-containing substance is recovered, H2 obtained by water electrolysis means is introduced into the synthesis gas, so that the H2 concentration of the synthesis gas sent to the combustion means can be increased. The power source of the water electrolysis means can use, for example, surplus power generated by renewable energy power generation. Then, by introducing O2 obtained by electrolysis of the water electrolysis means into the furnace body and using it as a gasification agent, the power required to produce the originally required O2 can be reduced.

[0026] Further, the gasification furnace equipment of the present invention according to claim 8 is the gasification furnace equipment according to claim 1, and is provided with water vapor electrolysis means for obtaining oxygen (O2) and hydrogen (H2) by electrolysis of water vapor. O2 obtained by the water vapor electrolysis means is introduced into the furnace body, and H2 obtained by the water vapor electrolysis means is introduced into the synthesis gas after the carbon-containing substance is recovered.

[0027] In the present invention according to claim 8, after the carbon-containing substance is recovered, H2 obtained by water vapor electrolysis means, for example, a solid oxide electrolysis cell (SOEC: Solid Oxide Electrolysis Cell), is introduced into the synthesis gas, so that the H2 concentration of the synthesis gas sent to the combustion means can be increased. The power source of the water vapor electrolysis means can use, for example, surplus power generated by renewable energy power generation. Then, by introducing O2 obtained by electrolysis of the water vapor electrolysis means into the furnace body and using it as a gasification agent, the power required to produce the originally required O2 can be reduced. As the water vapor electrolysis means, as long as it is means for electrolyzing water vapor to obtain oxygen (O2) and hydrogen (H2), means other than the solid oxide electrolysis cell can be used.

[0028] Furthermore, the gasification furnace equipment of the present invention according to claim 9 is characterized in that, in the gasification furnace equipment described in claim 1, the carbon-containing substance recovery means includes a chemical synthesis means in which the synthesis gas is used, and comprises a co-electrolytic means for obtaining oxygen (O2), hydrogen (H2), and carbon monoxide (CO) by electrolysis of water or steam and CO2, the O2 obtained by the co-electrolytic means is introduced into the furnace body, and the H2 and CO obtained by the co-electrolytic means are introduced into the synthesis gas used in the chemical synthesis means, or the synthesis gas after the carbon-containing substance has been recovered.

[0029] In the present invention according to claim 9, by adding H2 and CO obtained from a co-electrolytic means, such as a solid oxide electrolytic cell (SOEC), to the synthesis gas after the carbon-containing material has been recovered, it is possible to increase the H2 concentration of the synthesis gas sent to the combustion means. Furthermore, since the amount and ratio of water or steam and CO2 used for electrolysis in the co-electrolytic means can be arbitrarily adjusted, the synthesis gas can be made to have a chemically advantageous composition by using it in the chemical synthesis means. The power source for the co-electrolytic means can be, for example, surplus electricity from renewable energy generation. At this time, by electrolyzing the CO2 emitted by the carbon-containing material recovery means and using it again in the combustion means, the power fluctuations caused by renewable energy generation can be mitigated. Furthermore, by introducing the O2 obtained from the electrolysis of the co-electrolytic means into the furnace body and using it as a gasifying agent, the power required to produce the O2 that was originally needed can be reduced.

[0030] Furthermore, the gasification furnace equipment of the present invention according to claim 10 is a gasification furnace equipment according to any one of claims 1 to 9, characterized in that the combustion means is a boiler fueled by synthesis gas, a steam turbine is driven by steam generated in the boiler, and electricity is generated by driving the steam turbine.

[0031] In the present invention according to claim 10, the resulting synthesis gas is used as fuel for a boiler, and the high-temperature, high-pressure steam generated in the boiler drives a steam turbine to generate electricity. Since the synthesis gas, which has a reduced amount of carbon-containing substances, is used as fuel for the boiler, it becomes possible to construct a coal-fired power plant that significantly reduces CO2 emissions, even when using synthesis gas obtained from coal as a raw material.

[0032] Furthermore, the steam generated in the furnace can be used as a power source for the steam turbine, and the steam generated in the furnace can also be used as a gasifying agent for the furnace. [Effects of the Invention]

[0033] The gasification furnace equipment of the present invention makes it possible to use coal as a raw material while suppressing CO2 emissions (by reducing carbon-containing substances). [Brief explanation of the drawing]

[0034] [Figure 1] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to the first embodiment of the present invention. [Figure 2] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to a second embodiment of the present invention. [Figure 3] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to a third embodiment of the present invention. [Figure 4] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to a fourth embodiment of the present invention. [Figure 5] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to a fifth embodiment of the present invention. [Figure 6] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to the sixth embodiment of the present invention. [Figure 7] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to the seventh embodiment of the present invention. [Figure 8] This is a conceptual diagram showing the overall configuration of a gasification furnace facility according to the eighth embodiment of the present invention. [Modes for carrying out the invention]

[0035] Figure 1 conceptually shows the overall configuration of a gasification furnace facility according to the first embodiment of the present invention.

[0036] As shown in the figure, the gasification equipment includes a gasification furnace (furnace body) 1 to which coal as a raw material and at least steam (H2O) or oxygen (O2) as a gasifying agent are supplied (only steam is shown in the figure), and which produces hydrogen (H2)-rich synthesis gas through a gasification reaction. The synthesis gas obtained in the furnace body 1 is used to recover carbon-containing substances in a carbon-containing substance recovery means 2, and the carbon-containing substances recovered in the carbon-containing substance recovery means 2 are sent to a utilization means 3, where the output product is obtained.

[0037] The synthesis gas from which carbon-containing substances have been recovered is used as fuel for the boiler 4 as a means of combustion. In the boiler 4, synthesis gas and coal (pulverized coal) are used as fuel to generate high-temperature, high-pressure steam, which is expanded in the steam turbine 5 to drive the steam turbine 5 and generate electricity. The exhaust steam that has finished its work in the steam turbine 5 is condensed and fed back into the boiler 4.

[0038] With the above configuration, coal is used as a raw material, and steam (H2O) or oxygen (O2) is used as a gasifying agent. By using steam (H2O), the H2 concentration can be increased, and H2-rich synthesis gas is produced in the furnace body 1. Carbon-containing substances contained in the produced synthesis gas are recovered by the carbon-containing substance recovery means 2. The recovered carbon-containing substances are then used by the utilization means 3 to obtain the final product (the carbon-containing substances are effectively utilized), and the synthesis gas, in a state where carbon-containing substances are recovered and carbon dioxide (CO2) emissions are suppressed, can be used as fuel for the boiler 4.

[0039] Therefore, fuel for boiler 4 can be produced using coal, which has a high supply stability and a low price per unit of calorific value, while suppressing CO2 emissions (by reducing carbon-containing substances). Thus, it becomes possible to use coal as a raw material while suppressing CO2 emissions.

[0040] Furthermore, in addition to coal, carbon resources with a high hydrogen content can be used as raw materials in the furnace body 1 to increase the H2 concentration in the synthesis gas. For example, low-grade coal (sub-bituminous coal, lignite), woody biomass, herbaceous biomass, waste plastics, waste tires, food waste, and sewage sludge can be used. In some cases, carbon resources or biomass may be used instead of coal.

[0041] Furthermore, in addition to steam (H2O), CO2, oxygen (O2), or air can be used as gasifying agents in the furnace body 1. Moreover, the steam generated by heat exchange with synthesis gas in the furnace body 1 can be used as a driving source for the steam turbine 5, or / or used in the furnace body 1 as a gasifying agent.

[0042] On the other hand, a water electrolysis means 7 is provided to obtain O2 and H2 by electrolysis. The O2 obtained by the water electrolysis means 7 is introduced into the furnace body 1 as a gasifying agent, and the H2 obtained by the water electrolysis means 7 is introduced into the synthesis gas after the carbon-containing material has been recovered.

[0043] As will be explained in detail later, the water electrolysis means 7 can be replaced with a steam electrolysis means, such as a solid oxide electrolytic cell (SOEC), which obtains O2 and H2 by the electrolysis of steam. Alternatively, the water electrolysis means 7 can be replaced with a co-electrolysis means that obtains O2, H2, and carbon monoxide (CO) by the electrolysis of water or steam and CO2.

[0044] By adding H2 obtained from the water electrolysis means 7 to the synthesis gas after the carbon-containing material has been recovered, it is possible to increase the H2 concentration of the synthesis gas sent to the boiler 4. The power source for the water electrolysis means 7 can be, for example, surplus electricity from the renewable energy power generation equipment 8. Furthermore, by using O2 obtained from the electrolysis of the water electrolysis means 7 as a gasifying agent, the power required to produce the O2 that was originally needed can be reduced.

[0045] Other embodiments of the present invention (second to eighth embodiments) will be described based on Figures 2 to 8. Figures 2 to 8 conceptually show the overall configuration of the gasification furnace equipment according to the second to eighth embodiments of the present invention.

[0046] The embodiments shown in Figures 2 to 6 embody the configurations of the carbon-containing material recovery means 2 and utilization means 3, and the same reference numerals are used for the same components as in the configuration of the first embodiment shown in Figure 1. Furthermore, the embodiments shown in Figures 7 and 8 show a configuration in which a steam electrolysis means and a co-electrolysis means are provided instead of the water electrolysis means 7 shown in Figures 1 to 6, and the same reference numerals are used for the same components as in the configurations of the embodiments shown in Figures 1 to 6.

[0047] A second embodiment will be described based on Figure 2.

[0048] As shown in the figure, the gasification furnace equipment of the second embodiment, similar to the first embodiment, is supplied with coal as a raw material and at least steam (H2O) or oxygen (O2) as a gasifying agent (only steam is shown in the figure), and comprises a gasification furnace (furnace body) 1 that produces H2-rich synthesis gas through a gasification reaction.

[0049] The synthesis gas obtained in the furnace body 1 is sent to a char recovery means 11, which is a carbon-containing material recovery means that recovers char (unburned carbon components including ash) as a carbon-containing material using a cyclone (or filter). The char recovered in the char recovery means 11 is sent to equipment other than the furnace body as a means of utilization. For example, as a means of utilization, it is sent to a sintering facility 12, where a sintering process is carried out using the char, and iron ore is sintered and converted into sintered ore.

[0050] Therefore, fuel for boiler 4 can be produced using coal, which has a high supply stability and a low price per unit of calorific value, while suppressing CO2 emissions (by reducing carbon-containing substances). Moreover, by using char to perform processes such as sintering iron ore, char (carbon-containing substance) can be used as a substitute for coke, thereby reducing coke consumption.

[0051] In addition to the sintering process in the sintering equipment 12, other means of processing the recovered char in equipment other than the furnace body 1 include using the char for plowing into fields (agricultural equipment).

[0052] A third embodiment will be described based on Figure 3.

[0053] As shown in the figure, the gasification furnace equipment of the third embodiment, similar to the first embodiment, is supplied with coal as a raw material and at least steam (H2O) or oxygen (O2) as a gasifying agent (only steam is shown in the figure), and comprises a gasification furnace (furnace body) 1 that produces H2-rich synthesis gas through a gasification reaction.

[0054] The synthesis gas obtained in the furnace body 1 is separated from the soot (such as carbon dioxide) by a soot separation means (cyclone, filter, etc.) 15, which is a means of recovering carbon-containing substances. The soot (such as carbon dioxide) separated by the soot separation means 15 is sent to a carbon-containing product manufacturing facility 16, which is a means of producing carbon-containing products, and carbon-containing products are manufactured using the recovered soot (this reduces the amount of carbon-containing substances).

[0055] As the carbon-containing product manufacturing equipment 16, for example, a rubber manufacturing facility that manufactures rubber products (such as ties and rubber) using recovered soot can be applied, and rubber products (such as ties and rubber) can be manufactured as carbon-containing products using recovered soot (the carbon-containing substance can be reduced).

[0056] Therefore, fuel for boiler 4 can be produced using coal, which has a high supply stability and a low price per unit of calorific value, while suppressing CO2 emissions (by reducing carbon-containing substances). Moreover, soot can be used as a substitute for carbon black (petroleum product) made from petroleum-derived acetylene, thereby reducing the consumption of petroleum products.

[0057] A fourth embodiment will be described based on Figure 4.

[0058] As shown in the figure, the gasification furnace equipment of the fourth embodiment, similar to the first embodiment, is supplied with coal as a raw material and at least steam (H2O) or oxygen (O2) as a gasifying agent (only steam is shown in the figure), and comprises a gasification furnace (furnace body) 1 that produces H2-rich synthesis gas through a gasification reaction.

[0059] The synthesis gas obtained in the furnace body 1 is sent to the CO2 recovery means 19, which is a means of recovering carbon-containing substances. In the CO2 recovery means 19, CO2 is recovered using absorption means (chemical absorption method, physical absorption method). The CO2 recovered in the CO2 recovery means 19 is stored in a storage facility 20 (for example, an underground storage facility) as a means of utilization, and the stored CO2 is isolated and reused (the CO2 is effectively utilized).

[0060] Therefore, fuel for boiler 4 can be produced using coal, which has a high supply stability and a low price per unit of calorific value, while suppressing CO2 emissions (reducing CO2), and moreover, CO2 can be utilized effectively.

[0061] A fifth embodiment will be described based on Figure 5.

[0062] As shown in the figure, the gasification furnace equipment of the fifth embodiment, similar to the first embodiment, is supplied with coal as a raw material and at least steam (H2O) or oxygen (O2) as a gasifying agent (only steam is shown in the figure), and comprises a gasification furnace (furnace body) 1 that produces H2-rich synthesis gas through a gasification reaction.

[0063] The synthesis gas obtained in the furnace body 1 is sent to the carbon-containing material recovery means and the chemical synthesis means 23, which serves as a means of utilization. Chemical synthesis is carried out using the carbon monoxide (CO) contained in the synthesis gas, and chemical products (e.g., formic acid, oxalic acid) are synthesized (reducing the amount of carbon-containing material). For example, when used to synthesize oxalic acid as a chemical product, a solid compound is obtained, allowing for long-term storage of carbon. Furthermore, since CO reacts with water to produce oxalic acid and H2, the H2 obtained can be used to increase the H2 concentration of the synthesis gas.

[0064] Furthermore, it can be applied to the synthesis of chemical products such as methane, methanol, olefins (FT synthesis), acetic acid, and DME.

[0065] Therefore, fuel for boiler 4 can be produced using coal, which has a high supply stability and a low price per unit of calorific value, while suppressing CO2 emissions (by reducing carbon-containing substances).

[0066] A sixth embodiment will be described with reference to Figure 6.

[0067] As shown in the figure, the gasification furnace equipment of the sixth embodiment, similar to the first embodiment, is supplied with coal as a raw material and at least steam (H2O) or oxygen (O2) as a gasifying agent (only steam is shown in the figure), and comprises a gasification furnace (furnace body) 1 that produces H2-rich synthesis gas through a gasification reaction.

[0068] The synthesis gas obtained in the furnace body 1 is sent to the separation and reaction means 25, which serves as a means for recovering carbon-containing substances. The separation and reaction means 25 has a shift reaction device that reacts (shifts) the CO in the synthesis gas with water vapor (H2O) to convert it into H2 and CO2, and recovers (absorbs) the CO2. The CO2 recovered by the separation and reaction means 25 is stored in a storage facility 26 (for example, an underground storage facility) as a means for utilization, and the stored CO2 is isolated and reused (the CO2 is effectively utilized).

[0069] Therefore, fuel for boiler 4 can be produced using coal, which has a high supply stability and a low price per unit of calorific value, while suppressing CO2 emissions (reducing CO2), and moreover, CO2 can be utilized effectively.

[0070] As the separation and reaction means 25, a reaction apparatus (membrane reactor) having a membrane for separation and chemical reaction can be applied.

[0071] A seventh embodiment will be described with reference to Figure 7.

[0072] As shown in the figure, the gasification furnace equipment of the seventh embodiment is equipped with a steam electrolysis means 31, such as a solid oxide electrolytic cell (SOEC), which obtains O2 and H2 by electrolysis of steam, instead of the water electrolysis means 7 of the first embodiment (see Figure 1). The steam used in the steam electrolysis means 31 can be, for example, steam obtained from heat recovery in the gasification furnace 1 or boiler 4. It is also possible to use steam other than the steam obtained from heat recovery in the gasification furnace 1 or boiler 4.

[0073] Since steam can be supplied to the steam electrolysis means 31 from the gasifier 1 or boiler 4, if a solid oxide electrolytic cell (SOEC) is used as the steam electrolysis means 31, steam can be supplied to the solid oxide electrolytic cell (SOEC), allowing for effective utilization of the highly efficient solid oxide electrolytic cell (SOEC). The power source for the steam electrolysis means can, for example, be surplus electricity from renewable energy generation. Furthermore, by introducing the O2 obtained by electrolysis in the steam electrolysis means into the furnace body and using it as a gasifying agent, the power required to produce the O2 that was originally needed can be reduced. As for the steam electrolysis means, any means that obtains oxygen (O2) and hydrogen (H2) by electrolysis of steam can be used, other than a solid oxide electrolytic cell.

[0074] An eighth embodiment will be described based on Figure 8.

[0075] As shown in the figure, the gasification furnace equipment of the 8th embodiment replaces the water electrolysis means 7 of the 4th embodiment (see Figure 4) with a co-electrolysis means 32 that obtains O2, H2, and carbon monoxide CO by electrolysis of water or steam and CO2, as well as a CO2 recovery means 19 as a carbon-containing substance recovery means and a chemical synthesis means 23 of the 5th embodiment (the carbon-containing substance recovery means includes the chemical synthesis means 23). By supplying water or steam and CO2 recovered by the CO2 recovery means 19 to the co-electrolysis means 32 and performing co-electrolysis, O2, H2, and CO can be obtained.

[0076] The H2 and CO obtained in the co-electrolysis means 32 can be used as raw materials in the chemical synthesis means 23, as well as as fuel for the boiler 4. By providing the co-electrolysis means 32 to which CO2 is supplied, the CO2 recovered by the CO2 recovery means 19 can be effectively utilized, and CO2 emissions can be significantly reduced. The power source for the co-electrolysis means 32 can be, for example, surplus electricity from renewable energy generation. In this case, the CO2 emitted by the CO2 recovery means 19 can be electrolyzed and used again in the combustion means, thereby mitigating the power fluctuations caused by renewable energy generation. Furthermore, by introducing the O2 obtained from the electrolysis of the co-electrolysis means 32 into the furnace body 1 and using it as a gasifying agent, the power required to produce the O2 that was originally needed can be reduced.

[0077] Furthermore, since the amount and ratio of water or steam and CO2 used for electrolysis in the co-electrolysis means 32 can be arbitrarily adjusted, using them as synthesis gas in the chemical synthesis means allows the synthesis gas to have a chemically advantageous composition. At this time, by electrolyzing the CO2 emitted by the carbon-containing material recovery means and using it again in the combustion means, the fluctuations in electricity generated by renewable energy can be mitigated.

[0078] In the above-described embodiment, fuel for boiler 4 can be produced using coal, which has high supply stability and a low price per unit of calorific value, while suppressing CO2 emissions (by reducing carbon-containing substances). This makes it possible to use coal as fuel for combustion in power generation equipment while suppressing CO2 emissions. [Industrial applicability]

[0079] This technology can be used in the industrial sector for gasification furnace equipment (coal gasification furnace equipment). [Explanation of symbols]

[0080] 1. Gasification furnace (furnace body) 2. Means for recovering carbon-containing materials 3 Means of use 4 Boiler 5 Steam Turbine 7 Water electrolysis means 8. Renewable energy power generation facilities 11. Char recovery method 12 Sintering equipment 15. Suit separation means 16. Manufacturing facilities for carbon-containing products 19 CO2 Capture Equipment 20, 26 Storage facilities 23 Chemical synthesis means 25 Separation and reaction means 31. Steam electrolysis means 32 Co-electrolysis means

Claims

1. Coal and steam (H 2 O) or oxygen (O) 2 At least one supply of hydrogen (H) is provided through a gasification reaction. 2 ) The furnace body that generates rich synthesis gas, A carbon-containing substance recovery means for recovering carbon-containing substances contained in the generated synthesis gas, A means for obtaining a product using the carbon-containing material recovered by the carbon-containing material recovery means, The system comprises a combustion means that uses the synthesis gas remaining after the carbon-containing material has been recovered as fuel. A gasification furnace facility characterized by the following features.

2. In the gasification furnace equipment according to claim 1, The carbon-containing material recovery means is This is a char recovery means that recovers char as the carbon-containing material using a cyclone. The aforementioned means of use is, This is a means of processing the recovered char using equipment other than the furnace body. A gasification furnace facility characterized by the following features.

3. In the gasification furnace equipment according to claim 1, The carbon-containing material recovery means is This is a soot separation method that recovers soot as a carbon-containing substance using separation means. The aforementioned means of use is, This is a carbon-containing product manufacturing facility that uses the recovered soot to manufacture the carbon-containing product. A gasification furnace facility characterized by the following features.

4. In the gasification furnace equipment according to claim 1, The carbon-containing material recovery means is Using an absorption means, carbon dioxide (CO2) is used as the carbon-containing substance. 2 CO2 is recovered. 2 It is a means of recovery, The aforementioned means of use is, The recovered CO 2 It is a storage facility for storing, isolating, and reusing [unclear / unclear]. A gasification furnace facility characterized by the following features.

5. In the gasification furnace equipment according to claim 1, The carbon-containing material recovery means is A chemical synthesis means that performs chemical synthesis using the generated synthesis gas, The carbon-containing material recovery means and the utilization means are This is a chemical synthesis means that performs chemical synthesis using the generated synthesis gas to produce chemical products. A gasification furnace facility characterized by the following features.

6. In the gasification furnace equipment according to claim 1, The carbon-containing material recovery means is The carbon monoxide (CO) contained in the generated synthesis gas reacts with water vapor, and carbon dioxide (CO) 2 This is a separation and reaction means for recovering ) The aforementioned means of use is, The recovered CO 2 It is a storage facility for storing, isolating, and reusing [unclear / unclear]. A gasification furnace facility characterized by the following features.

7. In the gasification furnace equipment according to claim 1, Water electrolysis means for obtaining oxygen (O 2 ), and hydrogen (H 2 ) by electrolysis is provided. The O obtained by the water electrolysis means is placed in the furnace body. 2 As the carbon-containing substance is introduced, the H obtained by the water electrolysis means is added to the synthesis gas after the carbon-containing substance has been recovered. 2 It will be introduced. A gasification furnace facility characterized by the following features.

8. In the gasification furnace equipment according to claim 1, Electrolysis of water vapor produces oxygen (O 2 ) and hydrogen (H 2 The system includes a steam electrolysis means for obtaining ) The O obtained by the steam electrolysis means is added to the furnace body. 2 As the carbon-containing substance is introduced, the H obtained by the steam electrolysis means is added to the synthesis gas after the carbon-containing substance has been recovered. 2 It will be introduced. A gasification furnace facility characterized by the following features.

9. In the gasification furnace equipment according to claim 1, The carbon-containing material recovery means includes a chemical synthesis means in which the synthesis gas is used. Water or water vapor, and CO 2 Electrolysis of oxygen (O 2 ), hydrogen (H 2 ), equipped with a co-electrolytic means for obtaining carbon monoxide (CO), The O obtained by the co-electrolytic means is added to the furnace body. 2 At the same time, the synthesis gas used in the chemical synthesis means, or the synthesis gas after the carbon-containing substance has been recovered, is added, along with the H obtained by the co-electrolytic means. 2 CO is then injected. A gasification furnace facility characterized by the following features.

10. In the gasification furnace equipment according to any one of claims 1 to 9, The combustion means is It is a boiler that uses synthesis gas as fuel. The steam generated in the boiler drives a steam turbine, and the operation of the steam turbine generates electricity. A gasification furnace facility characterized by the following features.

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