JP2015148380A - Conventional thermal power plant and conventional thermal power generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conventional thermal power plant which can simply suppress the amount of carbon dioxide emissions.SOLUTION: A conventional thermal power plant 1 has a boiler 100 and generates power by burning fuel with the boiler 100. The conventional thermal power plant 1 has a dehydrogenation device 400 that generates hydrogen through dehydrogenation from an organic compound. The boiler 100 mixedly burns hydrogen generated by the dehydrogenation device 400 and fossil fuel.

Description

  The present invention relates to a conventional thermal power plant and a conventional thermal power generation method for generating power by burning fuel in a boiler.

  In a conventional thermal power plant in which fossil fuel is burned by a boiler and power is generated by a steam turbine, carbon dioxide emissions tend to increase compared to a combined cycle power plant that combines a steam turbine and a gas turbine. For this reason, conventionally, a conventional thermal power plant that improves power generation efficiency and suppresses carbon dioxide emissions has been proposed (see, for example, Patent Document 1).

JP 2008-248822 A

  However, in the conventional conventional thermal power plant, there is a problem that a complicated equipment configuration is required or the cost is increased in order to suppress the emission amount of carbon dioxide. In other words, when a conventional thermal power plant with improved power generation efficiency is newly established, a complicated equipment configuration is required or the cost increases. In addition, there is a similar problem when the existing conventional thermal power plant is improved to improve the power generation efficiency.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a conventional thermal power plant and a conventional thermal power generation method that can easily suppress the emission amount of carbon dioxide.

  In order to achieve the above object, a conventional thermal power plant according to an aspect of the present invention is a conventional thermal power plant that includes a boiler and generates power by burning fuel in the boiler, and dehydrogenates from an organic compound. Thus, a dehydrogenation device that generates hydrogen is provided, and the boiler co-fires the hydrogen generated by the dehydrogenation device and fossil fuel.

  According to this, in a conventional thermal power plant, hydrogen is generated by dehydrogenating from an organic compound with a dehydrogenation device, and electricity is generated by co-firing the hydrogen and fossil fuel with a boiler. That is, by generating power by burning not only fossil fuel but also hydrogen, the amount of carbon dioxide emission can be reduced as compared with the case of burning only fossil fuel. Thereby, the conventional thermal power plant which can suppress the discharge | emission amount of a carbon dioxide simply can be implement | achieved.

  In addition, the dehydrogenation device performs dehydrogenation by adding heat to the organic compound that at least one of steam, exhaust gas, and high-temperature air generated when the conventional thermal power plant generates power. Hydrogen may be generated.

  According to this, the dehydrogenation device performs dehydrogenation by adding the heat of the steam, exhaust gas or high-temperature air generated during power generation to the organic compound, thereby generating hydrogen. That is, the dehydrogenation device can easily generate hydrogen by using heat generated during power generation. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

  Furthermore, an air preheater that preheats air with exhaust gas is provided, and the dehydrogenation device adds heat of the exhaust gas or high-temperature air taken out from the exhaust gas inlet or the air outlet of the air preheater to the organic compound. Thus, dehydrogenation may be performed to generate hydrogen.

  According to this, the dehydrogenation device performs dehydrogenation by adding the heat of the exhaust gas or high-temperature air taken out from the exhaust gas inlet or the air outlet of the air preheater to the organic compound to generate hydrogen. That is, the dehydrogenation device can easily generate hydrogen by using heat extracted from the exhaust gas inlet or the air outlet of the air preheater. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

  The dehydrogenation device further comprises a denitration device for denitrating the exhaust gas, and the dehydrogenation device performs dehydrogenation by adding heat of the exhaust gas taken out from an inlet or an outlet of the denitration device to the organic compound, May be generated.

  According to this, the dehydrogenation device performs dehydrogenation by adding heat of the exhaust gas taken out from the inlet or outlet of the denitration device to the organic compound, thereby generating hydrogen. That is, the dehydrogenation device can easily generate hydrogen by using the heat extracted from the inlet or the outlet of the denitration device. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

  The dehydrogenation apparatus further includes a steam turbine, and the dehydrogenation apparatus adds heat to the organic compound by at least one of steam sent from the boiler to the steam turbine and extraction from the steam turbine. Dehydrogenation may be performed to generate hydrogen.

  According to this, a dehydrogenation apparatus performs dehydrogenation by adding the heat | fever which the vapor | steam sent from a boiler to a steam turbine, or the extraction air from a steam turbine has to an organic compound, and produces | generates hydrogen. That is, the dehydrogenation apparatus can easily generate hydrogen by using the heat of the steam or the extracted air. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

  The steam turbine includes a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine, and the dehydrogenation device includes main steam sent from the boiler to the high-pressure turbine, the high-pressure turbine, or the intermediate-pressure turbine. Dehydrogenation is performed by adding heat to at least one of extraction air and high-temperature reheat steam that is extracted from the high-pressure turbine, which is extracted from the high-pressure turbine, to the organic compound. May be generated.

  According to this, a dehydrogenation apparatus performs dehydrogenation by adding the heat which the main steam, the extraction from a high pressure turbine or an intermediate pressure turbine, or the high temperature reheat steam has to an organic compound, and produces | generates hydrogen. That is, the dehydrogenation apparatus can easily generate hydrogen by using the heat of the main steam, the extracted air, or the high-temperature reheated steam. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

  Further, the dehydrogenation apparatus uses at least one of steam, exhaust gas and high-temperature air used when generating hydrogen, steam, exhaust gas and high-temperature air used for generating power by the conventional thermal power plant. You may decide to supply as at least one of these.

  According to this, the dehydrogenation device reuses at least one of the steam, exhaust gas, and high-temperature air used when generating hydrogen for the conventional thermal power plant to generate power. Thereby, since heat can be utilized effectively, the fall of the power generation efficiency by using heat with a dehydrogenation apparatus can be suppressed.

  The dehydrogenation device may supply atmospheric pressure hydrogen to the boiler.

  According to this, the dehydrogenation device only has to supply normal-pressure hydrogen to the boiler, so there is no need to increase the pressure of the generated hydrogen. For this reason, in a conventional thermal power plant, hydrogen can be easily supplied to the boiler to generate electric power, so that the amount of carbon dioxide emission can be easily suppressed.

  The dehydrogenation device may generate hydrogen by dehydrogenating the hydrogenated organic compound using an organic chemical hydride method.

  According to this, a dehydrogenation apparatus produces | generates hydrogen by dehydrogenating from the hydrogenated organic compound using the organic chemical hydride method. Thereby, in a conventional thermal power plant, it is possible to easily generate hydrogen and generate electric power, so that it is possible to easily suppress the emission amount of carbon dioxide.

  Further, the boiler may co-fire hydrogen and coal generated by the dehydrogenation device.

  According to this, in a conventional thermal power plant, the generation of carbon dioxide, which increases due to the combustion of coal, can be easily suppressed by co-firing hydrogen and coal to generate power.

  Further, a generator may be provided, and the dehydrogenation device may supply the generated hydrogen as hydrogen for cooling the generator.

  According to this, the dehydrogenation apparatus can utilize the generated hydrogen as hydrogen for cooling the generator.

  Note that the present invention can be realized not only as such a conventional thermal power plant, but also as a conventional thermal power generation method that is a method of generating power in the conventional thermal power plant.

  According to the conventional thermal power plant in the present invention, it is possible to easily suppress the emission amount of carbon dioxide.

It is a schematic diagram which shows schematic structure of the conventional thermal power plant which concerns on embodiment of this invention. It is a schematic diagram which shows the structure around the steam turbine which concerns on embodiment of this invention. It is a schematic diagram which shows the structure around the boiler which concerns on embodiment of this invention. It is a block diagram which shows the function structure of the control apparatus which concerns on embodiment of this invention. It is a flowchart which shows the process which the control apparatus which concerns on embodiment of this invention performs. It is a schematic diagram which shows the structure around the boiler which concerns on the modification 1 of embodiment of this invention. It is a schematic diagram which shows the structure around the boiler which concerns on the modification 2 of embodiment of this invention. It is a schematic diagram which shows the structure around the steam turbine which concerns on the modification 3 of embodiment of this invention. It is a schematic diagram which shows the structure around the steam turbine which concerns on the modification 4 of embodiment of this invention.

  Hereinafter, a conventional thermal power plant according to an embodiment of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, processes, order of processes, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

(Embodiment)
First, the configuration of the conventional thermal power plant 1 will be described.

  FIG. 1 is a schematic diagram showing a schematic configuration of a conventional thermal power plant 1 according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a configuration around the steam turbine 200 according to the embodiment of the present invention. FIG. 3 is a schematic diagram showing a configuration around the boiler 100 according to the embodiment of the present invention.

  The conventional thermal power plant 1 is a power generation system that generates fuel by burning fuel with a boiler and generating power with a steam turbine.

  First, as shown in FIG. 1, the conventional thermal power plant 1 includes a power generation unit 10 including a boiler 100, a steam turbine 200, a generator 300, and the like, and a control device 20 that controls equipment included in the power generation unit 10. ing. Specifically, the power generation unit 10 includes a boiler 100, a steam turbine 200, a generator 300, a dehydrogenation device 400, a fossil fuel supply device 500, a denitration device 600, an air preheater 700, a chimney 800, and the like. .

  The boiler 100 is a boiler that co-fires the hydrogen generated by the dehydrogenation device 400 and fossil fuel, and is a constant pressure once-through boiler in the present embodiment. That is, the boiler 100 combusts the hydrogen supplied from the dehydrogenation device 400 and the fossil fuel supplied from the fossil fuel supply device 500.

  Here, the hydrogen supplied from the dehydrogenation apparatus 400 is normal-pressure hydrogen, specifically, normal temperature and normal-pressure hydrogen. The boiler 100 has a hydrogen combustion burner (not shown) for burning the hydrogen. In the present embodiment, the fossil fuel supplied from the fossil fuel supply device 500 is coal (pulverized coal), and the boiler 100 also has a pulverized coal combustion burner (not shown) that burns the pulverized coal. doing. That is, the boiler 100 co-fires the hydrogen generated by the dehydrogenation apparatus 400 and coal.

  In addition, the burner for hydrogen combustion and the burner for pulverized coal combustion are the conventional burner that burns hydrogen (burner that blows out hydrogen with air) and the burner that burns pulverized coal (burns pulverized coal with air). A burning burner) can be used.

  The boiler 100 has a main steam pipe 110 and sends steam (main steam) generated by burning fuel to the steam turbine 200 through the main steam pipe 110. The boiler 100 has a flue 120 and sends the exhaust gas after burning the fuel to the denitration device 600, the air preheater 700 and the chimney 800 through the flue 120. Further, a bottom ash treatment facility 130 is provided at the bottom of the boiler 100, and the bottom ash treatment facility 130 processes ash (coal ash) generated by burning fuel in the boiler 100.

  The type of the boiler 100 is not limited to a constant pressure once-through boiler, and may be any type of boiler such as a transformer once-through boiler or a circulation boiler.

  The steam turbine 200 is a turbine that is rotated by the energy of steam generated in the boiler 100. In the present embodiment, the steam turbine 200 includes a high-pressure turbine 210, an intermediate-pressure turbine 220, and a low-pressure turbine 230.

  The high-pressure turbine 210 is a turbine that is rotated by high-pressure steam, the intermediate-pressure turbine 220 is a turbine that is rotated by intermediate-pressure steam whose pressure is lower than that of the high-pressure steam, and the low-pressure turbine 230 is the medium-pressure turbine. It is a turbine that is rotated by low-pressure steam having a lower pressure than steam. In the present embodiment, the low pressure turbine 230, the intermediate pressure turbine 220, and the high pressure turbine 210 are arranged in this order from the side close to the generator 300.

  That is, the high-temperature and high-pressure steam (main steam) generated in the boiler 100 is sent to the high-pressure turbine 210 through the main steam pipe 110 to rotate the high-pressure turbine 210. Further, the steam exiting the high pressure turbine 210 is sent to the intermediate pressure turbine 220 to rotate the intermediate pressure turbine 220. Further, the steam exiting the intermediate pressure turbine 220 is sent to the low pressure turbine 230 to rotate the low pressure turbine 230.

  Specifically, as shown in FIG. 2, the high-temperature and high-pressure main steam generated in the boiler 100 is sent to the high-pressure turbine 210 through the main steam pipe 110 to rotate the high-pressure turbine 210. Further, the steam (low temperature reheat steam) exiting the high pressure turbine 210 is sent to the boiler 100 through the low temperature reheat steam pipe 211 and reheated by the boiler 100. Then, the steam (high-temperature reheated steam) reheated by the boiler 100 is sent to the intermediate pressure turbine 220 through the high-temperature reheat steam pipe 140 to rotate the intermediate pressure turbine 220. Further, the steam that has exited from the intermediate pressure turbine 220 is sent to the low pressure turbine 230 through the steam pipe 223 to rotate the low pressure turbine 230.

  The high-temperature reheat steam is heated to a temperature that is about the same as or higher than that of the main steam.

  Further, the steam that has exited the low-pressure turbine 230 is sent to the condenser 240 through the steam pipe 235, cooled in the condenser 240 to become water, and sent to the ground condenser 242 through the pipe 241.

  Here, the steam turbine 200 is configured to extract steam from eight locations as eight-stage extraction. That is, eight stages of extraction from the first extraction to the eighth extraction are extracted from the steam turbine 200.

  Specifically, the first extraction is extracted from the low-pressure turbine 230 by the first extraction pipe 231, and the extracted first extraction heats the water (water supply) that has exited the ground condenser 242 in the first water supply heater 251. To do. In addition, the second extraction is extracted from the low-pressure turbine 230 by the second extraction pipe 232, and the extracted second extraction heats the water supplied from the first water supply heater 251 in the second water supply heater 252.

  In addition, the third extraction is extracted from the low-pressure turbine 230 by the third extraction pipe 233, and the extracted third extraction heats the water supplied from the second water supply heater 252 in the third water supply heater 253. Further, the fourth extraction is extracted from the low pressure turbine 230 by the fourth extraction pipe 234, and the extracted fourth extraction heats the supply water that has exited the third supply heater 253 in the fourth supply heater 254.

  In this way, four stages of extraction from the first extraction to the fourth extraction are taken out from the low pressure turbine 230. In addition, the temperature of the extracted bleed air is the first bleed air, the second bleed air, the third bleed air, and the fourth bleed air from the lowest.

  Further, the fifth extraction is extracted from the intermediate pressure turbine 220 by the fifth extraction pipe 221, and the extracted fifth extraction is sent to the deaerator 255. Further, the sixth extraction is extracted from the intermediate pressure turbine 220 by the sixth extraction pipe 222, and the extracted sixth extraction heats the feed water deaerated by the deaerator 255 in the sixth feed water heater 256.

  In this way, two stages of extraction of the fifth extraction and the sixth extraction are taken out from the intermediate pressure turbine 220. The temperature of the extracted bleed air is the fifth bleed air and the sixth bleed air from the lowest. In addition, the fifth and sixth bleed air are at higher temperatures than the bleed air from the first bleed air to the fourth bleed air.

  The seventh extraction (auxiliary steam) is taken out from the low-temperature reheat steam pipe 211 of the high-pressure turbine 210 through the seventh extraction pipe 212, and the extracted seventh extraction air is supplied to the sixth water supply heater 257 by the sixth water supply heater. Heat the feed water exiting 256. Further, the eighth extraction gas is extracted from the high-pressure turbine 210 by the eighth extraction pipe 213, and the extracted eighth extraction gas heats the supply water that has exited the seventh supply water heater 257 in the eighth supply water heater 258. Then, the water supplied by the seventh water heater 257 is sent to the boiler 100 through the pipe 259.

  In this manner, the two stages of extraction of the seventh extraction and the eighth extraction are extracted from the high pressure turbine 210. The temperature of the extracted bleed air is the seventh bleed air and the eighth bleed air from the lowest.

  The steam turbine 200 may have a configuration that does not include any of the high-pressure turbine 210, the intermediate-pressure turbine 220, and the low-pressure turbine 230. Further, the extraction from the steam turbine 200 may not be the eight-stage extraction as described above.

  The main steam pipe 110, the high temperature reheat steam pipe 140, the low temperature reheat steam pipe 211, the first extraction pipe 231 to the eighth extraction pipe 213, the steam pipes 223, 235, the pipes 241, 259, etc. As long as it is configured with specifications (bore diameter, material, etc.) according to the conditions (flow rate, flow velocity, temperature, pressure, etc.) of the passing steam (or water), any specification may be used.

  The first water heater 251 to the fourth water heater 254 and the sixth water heater 256 to the eighth water heater 258 exchange heat between the first bleeder to the fourth bleeder and the sixth bleeder to the eighth bleeder and the water supply. However, the structure of the heat exchanger is not particularly limited.

  Returning to FIG. 1, the generator 300 is a turbine generator that generates power by converting the rotational force of the steam turbine 200 into electric power. Specifically, the generator 300 is disposed on the side of the low-pressure turbine 230 (on the side opposite to the intermediate-pressure turbine 220), and converts the rotational force of the high-pressure turbine 210, the intermediate-pressure turbine 220, and the low-pressure turbine 230 into electric power. To generate electricity.

  In addition, since the generator 300 generates a large current through the field and the stator during power generation and becomes high temperature, hydrogen as a refrigerant is enclosed in the machine. Specifically, the generator 300 is cooled by enclosing hydrogen supplied from the dehydrogenation device 400 through the generator supply pipe 450 into the machine.

  The dehydrogenation device 400 is a device that generates hydrogen by dehydrogenating an organic compound. Specifically, the dehydrogenation apparatus 400 generates hydrogen by dehydrogenating a hydrogenated organic compound using an organic chemical hydride method. Here, the organic chemical hydride method means hydrogenating an aromatic compound, storing hydrogen as a hydrogenated aromatic compound, transporting it to the place of use, and dehydrogenating it from the hydrogenated aromatic compound at the place of use. In this method, hydrogen can be taken out and hydrogen can be stored and transported safely.

  In the present embodiment, the dehydrogenation apparatus 400 generates toluene and hydrogen by causing heat to be applied to MCH (methylcyclohexane) that is an organic compound to cause a dehydrogenation reaction. Here, MCH can be produced by performing a hydrogenation reaction on toluene. The required amount of MCH is received in advance on the premises of the conventional thermal power plant 1 and stored in a tank or the like.

  Specifically, the dehydrogenation device 400 receives MCH from the tank through the MCH input pipe 410. And the dehydrogenation apparatus 400 produces | generates toluene and hydrogen by adding a thermal energy to received MCH and raise | generating a dehydrogenation reaction. Then, the dehydrogenation device 400 takes out the produced toluene from the toluene outlet pipe 420 and takes out the produced hydrogen from the hydrogen outlet pipe 430. In addition, the toluene taken out from the toluene outlet piping 420 is appropriately stored after being temporarily stored in a tank or the like.

  Further, the hydrogen taken out from the hydrogen outlet pipe 430 is supplied to the boiler 100 through the boiler supply pipe 440. Here, the hydrogen generated in the dehydrogenation apparatus 400 is hydrogen at normal temperature and normal pressure. That is, the dehydrogenation apparatus 400 supplies hydrogen at normal temperature and normal pressure to the boiler 100. The normal temperature refers to a pressure of about 10 to 20 ° C., and the normal pressure refers to a pressure of about 0.1 to 0.3 MPa.

  Further, the hydrogen taken out from the hydrogen outlet pipe 430 is supplied to the generator 300 through the generator supply pipe 450. That is, the dehydrogenation apparatus 400 supplies the generated hydrogen as hydrogen for cooling the generator 300. As described above, the hydrogen generated by the dehydrogenation apparatus 400 is also used as cooling hydrogen for the generator 300.

  Here, the dehydrogenation device 400 adds the heat of at least one of steam, exhaust gas, and high-temperature air generated when the conventional thermal power plant 1 generates power to the organic compound (MCH), thereby dehydrogenating. To produce hydrogen. In the present embodiment, dehydrogenation apparatus 400 performs dehydrogenation by adding heat of the high-temperature air taken out from the air outlet of air preheater 700 to the organic compound (MCH) to generate hydrogen.

  Specifically, the dehydrogenation apparatus 400 performs dehydrogenation by adding heat of the high temperature air in the high temperature air pipe 731 taken out from the air outlet duct 730 of the air preheater 700 to the organic compound (MCH). To produce hydrogen. That is, a heat exchanger (not shown) is disposed in the dehydrogenation apparatus 400, and heat energy of the high temperature air is added to the MCH to generate hydrogen.

  In addition, the dehydrogenation apparatus 400 uses at least one of steam, exhaust gas, and high-temperature air used when generating hydrogen as the steam, exhaust gas, and high-temperature air used for the conventional thermal power plant 1 to generate power. As at least one of the above. In the present embodiment, the dehydrogenation device 400 performs heat exchange by passing the high-temperature air taken out from the air outlet of the air preheater 700 through the heat exchanger, and then removes the high-temperature air taken out from the heat exchanger. Return to air outlet duct 730 again. Thereby, the said high temperature air is effectively utilized as combustion air in the boiler 100.

  Note that the supply destination of the high-temperature air is not limited to the air outlet duct 730, and may be effectively used other than the combustion air in the boiler 100.

  The fossil fuel supply device 500 is a device that supplies coal (pulverized coal) that is fossil fuel to the boiler 100. Specifically, the fossil fuel supply apparatus 500 has a storage facility (not shown) for storing coal, the coal stored in the storage facility is pulverized into pulverized coal, and the pulverized coal is pulverized. It is supplied to the boiler 100 through the charcoal conveyance path 510.

  The denitration device 600 is a device for denitrating exhaust gas. Specifically, the denitration apparatus 600 is disposed in front of the air preheater 700 in the flue 120 of the boiler 100, and removes nitrogen oxides in the exhaust gas toward the air preheater 700 in the flue 120.

  The air preheater 700 is a device that preheats air with exhaust gas, that is, a device that heats the combustion air before sending it to the boiler 100 in order to increase the thermal efficiency of the boiler 100. Specifically, a push fan 710 is connected to the air preheater 700, and air is sent through the air inlet duct 720 by driving the push fan 710. And the air preheater 700 heat-exchanges the said air with the waste gas which exited the denitration apparatus 600 in the flue 120, and sends it out to the air outlet duct 730 as high temperature air.

  More specifically, as shown in FIG. 3, a steam air preheater 740 is arranged in the air inlet duct 720 between the air preheater 700 and the pushing fan 710. The steam type air preheater 740 heats the air sent to the air inlet duct 720 by the pushing fan 710 with steam. The air heated by the steam air preheater 740 is heated again by the air preheater 700 and sent to the boiler 100 through the air outlet duct 730.

  That is, the air outlet duct 730 is connected to the wind box of the boiler 100, and the high-temperature air heated by the air preheater 700 is sent to the wind box. And the high temperature air sent to the wind box of this boiler 100 is used as combustion air of hydrogen and pulverized coal.

  The air preheater 700 has a configuration in which a heat transfer element (element) is disposed therein and performs heat exchange between the air and the exhaust gas. Any configuration can be used as long as heat exchange can be performed.

  Further, as shown in FIG. 3, a economizer 124 is disposed in front of the denitration device 600 in the flue 120. The economizer 124 is a device that heats feed water or the like using the residual heat of the combustion exhaust gas from the boiler 100.

  An electric dust collector 910, a suction fan 920, and a desulfurization device 930 are disposed between the air preheater 700 and the chimney 800 in the flue 120. The electric dust collector 910 is a device that attracts and removes dust in the exhaust gas by electrostatic force. The suction fan 920 is a fan that sucks exhaust gas from the boiler 100 through the flue 120 and guides it to the chimney 800. The desulfurization device 930 is a device that removes sulfur oxide in the exhaust gas.

  As described above, nitrogen oxides, dust (ash), sulfur oxides, and the like are removed from the exhaust gas and discharged from the chimney 800.

  Further, with the above configuration, when the conventional thermal power plant 1 outputs 600 MW at full load operation, the outlet air temperature of the air preheater 700 in the air outlet duct 730 (temperature of hot air in the hot air pipe 731). Is approximately 340 ° C. Here, the temperature at which the dehydrogenator 400 can efficiently generate hydrogen from MCH is, for example, 300 ° C. (catalyst activation temperature when the conversion rate is 90%). For this reason, the dehydrogenation apparatus 400 can produce | generate hydrogen efficiently by adding the heat | fever which the high temperature air taken in through the high temperature air pipe 731 has to MCH.

  Moreover, since the high temperature air taken out from the heat exchanger of the dehydrogenation apparatus 400 is about 300 ° C., the heat of the high temperature air can be effectively utilized by returning the high temperature air to the air outlet duct 730. .

  Next, the configuration of the control device 20 included in the conventional thermal power plant 1 and the processing performed by the control device 20 will be described in detail.

  FIG. 4 is a block diagram showing a functional configuration of the control device 20 according to the embodiment of the present invention. FIG. 5 is a flowchart showing processing performed by the control device 20 according to the embodiment of the present invention.

  First, as shown in FIG. 4, the control device 20 is a device that controls equipment included in the power generation unit 10, specifically, a dehydrogenation control unit 21, a fuel control unit 22, and a generator cooling control unit 23. The power generation control unit 24 and the storage unit 25 are provided.

  The dehydrogenation control unit 21 controls the dehydrogenation device 400. Specifically, the dehydrogenation control unit 21 adjusts the amount of MCH received by the dehydrogenation apparatus 400 from the MCH input pipe 410, the amount of heat of high-temperature air taken in from the high-temperature air pipe 731 and the like, and is taken out from the hydrogen outlet pipe 430. Adjust the amount of hydrogen, temperature or pressure. In the present embodiment, the dehydrogenation control unit 21 controls the dehydrogenation apparatus 400 so that the amount of hydrogen supplied to the boiler 100 is constant and the hydrogen is at room temperature and normal pressure.

  The fuel control unit 22 controls the fuel supplied to the boiler 100. Specifically, the fuel control unit 22 adjusts the balance between the amount of hydrogen supplied from the dehydrogenation device 400 and the amount of pulverized coal supplied from the fossil fuel supply device 500. In the present embodiment, the fuel control unit 22 changes the amount of pulverized coal supplied from the fossil fuel supply device 500 to the boiler 100 so that the amount of hydrogen supplied to the boiler 100 can be maintained constant.

  The generator cooling control unit 23 controls cooling of the generator 300. Specifically, the generator cooling control unit 23 adjusts the amount, temperature, pressure, or the like of cooling hydrogen supplied from the dehydrogenation device 400 to the generator 300.

  The power generation control unit 24 controls power generation by the power generation unit 10. Specifically, the power generation control unit 24 controls various devices such as the boiler 100, the steam turbine 200, and the generator 300 included in the power generation unit 10 to generate power.

  The storage unit 25 is a memory that stores data necessary for processing performed by each processing unit included in the control device 20. The storage unit 25 stores, for example, the upper limit, lower limit or target value of the amount of MCH received by the dehydrogenation control unit 21 from the MCH input pipe 410, the upper limit, lower limit or target value of the amount of heat of high-temperature air taken in from the high temperature air pipe 731. I remember it.

  Next, processing (conventional thermal power generation method) performed by each processing unit included in the control device 20 will be described. In the following description, a characteristic part of the present invention will be described among the processes.

  As shown in FIG. 5, first, the dehydrogenation control unit 21 generates hydrogen by dehydrogenating from an organic compound as a dehydrogenation step (S102). That is, the dehydrogenation control unit 21 adjusts the amount of hydrogen taken out from the hydrogen outlet pipe 430, the temperature, the pressure, or the like by adjusting the amount of MCH received by the dehydrogenation apparatus 400, the amount of heat of high-temperature air to be taken in, or the like.

  And the fuel control part 22 co-fires the hydrogen produced | generated by the dehydrogenation process, and the fossil fuel with the boiler 100 as a co-firing process (S104). That is, the fuel control unit 22 adjusts the balance between the amount of hydrogen supplied from the dehydrogenation device 400 and the amount of pulverized coal supplied from the fossil fuel supply device 500, and co-fires hydrogen and pulverized coal.

  And the generator cooling control part 23 controls supply of the hydrogen for cooling to the generator 300 as a generator cooling process (S106). That is, the generator cooling control unit 23 adjusts the amount, temperature, pressure, or the like of cooling hydrogen supplied from the dehydrogenation device 400 to the generator 300.

  As described above, according to the conventional thermal power plant 1 according to the embodiment of the present invention, hydrogen is generated by dehydrogenating from an organic compound in the dehydrogenation device 400, and the hydrogen and the fossil fuel are generated in the boiler 100. Power is generated by co-firing. That is, by generating power by burning not only fossil fuel but also hydrogen, the amount of carbon dioxide emission can be reduced as compared with the case of burning only fossil fuel. Thereby, the conventional thermal power plant 1 which can suppress the discharge | emission amount of a carbon dioxide simply can be implement | achieved.

  In addition, the dehydrogenation device 400 performs dehydrogenation by adding heat of the high-temperature air taken out from the air outlet of the air preheater 700 to the organic compound to generate hydrogen. That is, the dehydrogenation device 400 can easily generate hydrogen by using the heat extracted from the air outlet of the air preheater 700. In particular, when using the heat of the high-temperature air taken out from the air outlet of the air preheater 700, there is less concern about erosion due to ash or the like contained in the exhaust gas. It is desirable to use it. Thereby, in the conventional thermal power plant 1, the discharge amount of carbon dioxide can be easily suppressed.

  In addition, the dehydrogenation apparatus 400 only needs to supply hydrogen at normal temperature and normal pressure to the boiler 100, so there is no need to increase the pressure of the generated hydrogen. For this reason, in the conventional thermal power plant 1, hydrogen can be easily supplied to the boiler 100 to generate electric power, so that the emission amount of carbon dioxide can be easily suppressed.

  In addition, when hydrogen is supplied to a gas turbine in combined cycle power generation or the like, it is necessary to increase the pressure to about 1.3 to 5 MPa. However, in the conventional thermal power plant 1, hydrogen at normal temperature and normal pressure is used. Since it suffices to supply to the boiler 100, handling of hydrogen is easy, and reduction in power generation efficiency can be suppressed.

  Moreover, the dehydrogenation apparatus 400 produces | generates hydrogen by dehydrogenating from the organic compound hydrogenated using the organic chemical hydride method. Thereby, in the conventional thermal power plant 1, since it can generate | occur | produce electricity by producing | generating hydrogen easily, the discharge | emission amount of a carbon dioxide can be suppressed easily.

  Moreover, in the conventional thermal power plant 1, by performing a power generation by co-firing hydrogen and coal, it is possible to easily suppress the amount of carbon dioxide emission that increases due to the combustion of coal.

  Further, the dehydrogenation apparatus 400 can utilize the generated hydrogen as cooling hydrogen for the generator 300.

(Modification 1)
Next, Modification 1 of the above embodiment will be described. In the said embodiment, the dehydrogenation apparatus 400 decided to produce | generate hydrogen by adding the heat which the high temperature air taken out from the air outlet of the air preheater 700 has to an organic compound. However, in this modification, the dehydrogenation device 400 generates hydrogen by adding heat of the exhaust gas extracted from the exhaust gas inlet of the air preheater 700 to the organic compound.

  FIG. 6 is a schematic diagram showing a configuration around the boiler 100 according to the first modification of the embodiment of the present invention.

  As shown in the figure, an exhaust gas inlet pipe 121 is provided at the exhaust gas inlet of the air preheater 700 in the flue 120. And the dehydrogenation apparatus 400 dehydrogenates by adding the heat | fever which the exhaust gas in the exhaust gas inlet pipe 121 has to an organic compound (MCH), and produces | generates hydrogen. That is, a heat exchanger is arranged in the dehydrogenation apparatus 400, and heat energy of the exhaust gas is added to the MCH to generate hydrogen.

  As described above, the dehydrogenation apparatus 400 performs dehydrogenation by adding heat of the exhaust gas extracted from the exhaust gas inlet of the air preheater 700 to the organic compound to generate hydrogen.

  In addition, the dehydrogenation apparatus 400 performs heat exchange by passing the exhaust gas extracted from the exhaust gas inlet of the air preheater 700 through the heat exchanger, and then converts the exhaust gas extracted from the heat exchanger to the exhaust gas of the air preheater 700. Return to the entrance again. Thereby, the exhaust gas is effectively used as a heat source in the air preheater 700. Note that the supply destination of the exhaust gas is not limited to the exhaust gas inlet of the air preheater 700, and may be effectively used other than the heat source in the air preheater 700.

  When the conventional thermal power plant has an output of 600 MW at full load operation, the inlet exhaust gas temperature of the air preheater 700 in the flue 120 (the temperature of the exhaust gas in the exhaust gas inlet pipe 121) is approximately 380 ° C. Here, the temperature at which the dehydrogenator 400 can efficiently generate hydrogen from MCH is, for example, 300 ° C. (catalyst activation temperature when the conversion rate is 90%). For this reason, the dehydrogenation apparatus 400 can produce | generate hydrogen efficiently by adding the heat | fever which the exhaust gas taken in through the exhaust gas inlet pipe 121 has to MCH.

  As described above, according to the conventional thermal power plant according to the first modification of the embodiment of the present invention, the dehydrogenation device 400 converts the heat of the exhaust gas taken out from the exhaust gas inlet of the air preheater 700 into an organic compound. By adding, dehydrogenation is performed to generate hydrogen. That is, the dehydrogenation device 400 can easily generate hydrogen by using the heat extracted from the exhaust gas inlet of the air preheater 700. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

(Modification 2)
Next, a second modification of the above embodiment will be described. In the first modification of the above embodiment, the dehydrogenation apparatus 400 generates hydrogen by adding heat of the exhaust gas taken out from the exhaust gas inlet of the air preheater 700 to the organic compound. However, in this modification, the dehydrogenation device 400 generates hydrogen by adding heat of the exhaust gas taken out from the inlet or outlet of the denitration device 600 to the organic compound.

  FIG. 7 is a schematic diagram showing a configuration around the boiler 100 according to the second modification of the embodiment of the present invention.

  As shown in the figure, a denitration device inlet pipe 122 is provided at the inlet of the denitration device 600 in the flue 120. And the dehydrogenation apparatus 400 performs dehydrogenation by adding the heat | fever which the waste gas in the denitration apparatus inlet pipe 122 has to an organic compound (MCH), and produces | generates hydrogen.

  Further, a denitration device outlet pipe 123 may be provided at the outlet of the denitration device 600 in the flue 120. Then, the dehydrogenation device 400 may generate hydrogen by performing dehydrogenation by adding heat of the exhaust gas in the denitration device outlet pipe 123 to the organic compound (MCH).

  As described above, the dehydrogenation device 400 performs dehydrogenation by adding heat of the exhaust gas taken out from the inlet or the outlet of the denitration device 600 to the organic compound, thereby generating hydrogen.

  Further, the dehydrogenation device 400 passes the exhaust gas taken out from the inlet or outlet of the denitration device 600 through a heat exchanger to perform heat exchange, and then the exhaust gas taken out from the heat exchanger is sent to the inlet or outlet of the denitration device 600. Return to the exit again. Thereby, the exhaust gas is effectively used as a heat source in the air preheater 700. The supply destination of the exhaust gas is not limited to the inlet or the outlet of the denitration apparatus 600, and may be effectively used other than the heat source in the air preheater 700.

  When the conventional thermal power plant has an output of 600 MW at full load operation, the exhaust gas temperature at the inlet of the NOx removal device 600 in the flue 120 (temperature of the exhaust gas in the NOx removal device inlet pipe 122) is approximately 380 ° C. The exhaust gas temperature at the outlet of the denitration device 600 (the temperature of the exhaust gas in the denitration device outlet pipe 123) is also approximately 380 ° C. For this reason, the dehydrogenation apparatus 400 can generate hydrogen efficiently by adding the heat of the exhaust gas taken in through the denitration apparatus inlet pipe 122 or the denitration apparatus outlet pipe 123 to the MCH.

  As described above, according to the conventional thermal power plant according to the second modification of the embodiment of the present invention, the dehydrogenation device 400 converts the heat of the exhaust gas taken out from the inlet or the outlet of the denitration device 600 into an organic compound. By adding, dehydrogenation is performed to generate hydrogen. That is, the dehydrogenation apparatus 400 can easily generate hydrogen by using heat extracted from the inlet or the outlet of the denitration apparatus 600. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

  In the above description, the denitration apparatus inlet pipe 122 is provided at the inlet of the denitration apparatus 600, but it can also be said that the denitration apparatus inlet pipe 122 is provided at the outlet of the economizer 124. That is, the dehydrogenation device 400 may perform dehydrogenation by adding heat of the exhaust gas taken out from the outlet of the economizer 124 to the organic compound (MCH) to generate hydrogen.

(Modification 3)
Next, Modification 3 of the above embodiment will be described. In the said embodiment and its modification, the dehydrogenation apparatus 400 decided to produce | generate hydrogen by adding the heat taken out from the waste gas system | strain to an organic compound. However, in this modification, the dehydrogenation apparatus 400 generates hydrogen by adding heat of the extraction air from the steam turbine 200 to the organic compound.

  FIG. 8 is a schematic diagram showing a configuration around the steam turbine 200 according to the third modification of the embodiment of the present invention.

  As shown in the figure, an eighth extraction pipe 214 is provided in the eighth extraction pipe 213 from the high-pressure turbine 210. Then, the dehydrogenation device 400 performs dehydrogenation by adding heat of the eighth extraction in the eighth extraction pipe 214 to the organic compound (MCH), thereby generating hydrogen. That is, a heat exchanger is arranged in the dehydrogenation apparatus 400, and the thermal energy of the eighth extraction is added to MCH to generate hydrogen.

  Further, a fifth extraction pipe 224 may be provided in the fifth extraction pipe 221 from the intermediate pressure turbine 220. Then, the dehydrogenation device 400 may perform dehydrogenation by adding heat of the fifth extraction gas in the fifth extraction tube 224 to the organic compound (MCH) to generate hydrogen.

  A sixth extraction pipe 225 may be provided in the sixth extraction pipe 222 from the intermediate pressure turbine 220. Then, the dehydrogenation apparatus 400 may generate hydrogen by performing dehydrogenation by adding heat of the sixth extraction gas in the sixth extraction tube 225 to the organic compound (MCH).

  The eighth extraction pipe 214, the fifth extraction pipe 224, or the sixth extraction pipe 225 has specifications (bore diameter, material, etc.) according to the conditions (flow rate, flow rate, temperature, pressure, etc.) of the steam passing through the inside. As long as it is configured with any pipe, it does not matter what kind of piping it is.

  As described above, the dehydrogenation apparatus 400 performs the dehydrogenation by adding the heat of the extracted air from the steam turbine 200 to the organic compound, thereby generating hydrogen.

  In addition, the dehydrogenation apparatus 400 passes the extraction from the steam turbine 200 through the heat exchanger to perform heat exchange, and then returns the extraction extracted from the heat exchanger to the extraction system from the steam turbine 200 again. For example, the dehydrogenation apparatus 400 performs heat exchange by passing the sixth extraction through a heat exchanger, and then converts the sixth extraction extracted from the heat exchanger into a seventh extraction system (for example, the seventh extraction pipe in FIG. 2). 212). Thus, the extracted air is effectively utilized as a heat source in the seventh extraction system (auxiliary steam system). Note that the supply destination of the extraction air is not limited to the extraction air system, and may be effectively used other than the heat source in the extraction air system.

  When the conventional thermal power plant has an output of 600 MW at full load operation, the temperature of the eighth extraction (the temperature of the extraction in the eighth extraction pipe 214) is approximately 350 ° C., and the temperature of the fifth extraction ( The temperature of the extraction air in the fifth extraction pipe 224) is about 390 ° C., and the temperature of the sixth extraction (temperature of extraction in the sixth extraction pipe 225) is about 470 ° C. For this reason, the dehydrogenation apparatus 400 efficiently generates hydrogen by adding heat to the MCH that is extracted through the eighth extraction pipe 214, the fifth extraction pipe 224, or the sixth extraction pipe 225. be able to.

  As described above, according to the conventional thermal power plant according to the third modification of the embodiment of the present invention, the dehydrogenation device 400 is extracted from the steam turbine 200 (extracted from the high-pressure turbine 210 or the intermediate-pressure turbine 220). Is added to the organic compound to perform dehydrogenation to generate hydrogen. That is, the dehydrogenation apparatus 400 can easily generate hydrogen by using the heat of the extracted air. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

(Modification 4)
Next, Modification 4 of the above embodiment will be described. In Modification 3 described above, the dehydrogenation apparatus 400 generates hydrogen by adding heat, which is extracted from the steam turbine 200, to the organic compound. However, in the present modification, the dehydrogenation apparatus 400 generates hydrogen by adding heat, which the steam sent from the boiler 100 to the steam turbine 200 has, to the organic compound.

  FIG. 9 is a schematic diagram showing a configuration around the steam turbine 200 according to the fourth modification of the embodiment of the present invention.

  As shown in the figure, the main steam extraction pipe 111 is provided in the main steam pipe 110. And the dehydrogenation apparatus 400 performs dehydrogenation by adding the heat which the main steam in the main steam extraction pipe | tube 111 has to an organic compound (MCH), and produces | generates hydrogen.

  Moreover, the high temperature reheat steam extraction pipe 141 may be provided in the high temperature reheat steam pipe 140. And the dehydrogenation apparatus 400 may decide to dehydrogenate and produce | generate hydrogen by adding the heat which the high temperature reheat steam in the high temperature reheat steam extraction pipe | tube 141 has to an organic compound (MCH). .

  In addition, if the main steam extraction pipe 111 or the high-temperature reheat steam extraction pipe 141 is configured with specifications (bore diameter, material, etc.) according to the conditions (flow rate, flow velocity, temperature, pressure, etc.) of the steam passing through the inside, Any type of piping is acceptable.

  Thus, the dehydrogenation apparatus 400 performs dehydrogenation by adding the heat of the steam sent from the boiler 100 to the steam turbine 200 to the organic compound, thereby generating hydrogen.

  In addition, the dehydrogenation apparatus 400 performs heat exchange by passing the steam from the main steam system or the high-temperature reheat steam system through the heat exchanger, and then converts the steam taken out from the heat exchanger into the main steam system, the high temperature Return to reheat steam system or other system. In addition, since the steam from the main steam system or the high-temperature reheat steam system is high-temperature steam, it can be effectively used in various places related to power generation.

  When the conventional thermal power plant has an output of 600 MW at full load operation, the temperature of the main steam (the temperature of the steam in the main steam extraction pipe 111) is approximately 540 ° C., and the temperature of the high-temperature reheated steam (high temperature) The temperature of the steam in the reheat steam outlet pipe 141) is approximately 570 ° C. For this reason, the dehydrogenation apparatus 400 can produce | generate hydrogen efficiently by adding the heat | fever which the steam taken in through the main steam extraction pipe | tube 111 or the high temperature reheat steam extraction pipe | tube 141 has to MCH.

  As described above, according to the conventional thermal power plant according to the fourth modification of the embodiment of the present invention, the dehydrogenation device 400 is steam (main steam or high-temperature reheat steam) sent from the boiler 100 to the steam turbine 200. Is added to the organic compound to perform dehydrogenation to generate hydrogen. That is, the dehydrogenation apparatus 400 can easily generate hydrogen by using the heat of the steam. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed.

  Thus, according to the modification examples 3 and 4, the dehydrogenation apparatus 400 adds the heat of at least one of the steam sent from the boiler 100 to the steam turbine 200 and the bleed air from the steam turbine 200 to the organic compound. Thus, dehydrogenation is performed to generate hydrogen. That is, the dehydrogenation apparatus 400 heats the main steam sent from the boiler 100 to the high-pressure turbine 210, the extracted air from the high-pressure turbine 210 or the intermediate-pressure turbine 220, and the low-temperature reheated steam extracted from the high-pressure turbine 210 by the boiler 100. By applying heat to at least one of the generated high-temperature reheat steam to the organic compound, dehydrogenation is performed to generate hydrogen.

  And according to the above embodiment and its modification, the dehydrogenation apparatus 400 performs dehydrogenation by adding the heat | fever which the vapor | steam, waste gas, or high temperature air produced | generated in the time of electric power generation has to an organic compound. , Producing hydrogen. That is, the dehydrogenation apparatus 400 can easily generate hydrogen by using heat generated during power generation. Thereby, in a conventional thermal power plant, the amount of carbon dioxide emission can be easily suppressed. In addition, the dehydrogenation device 400 contributes to the improvement of power generation efficiency by effectively utilizing the heat generated during power generation for the generation of hydrogen.

  In addition, the dehydrogenation apparatus 400 can acquire heat in various temperature zones at a high temperature and can suppress a decrease in power generation efficiency as compared with a case where hydrogen is generated in combined cycle power generation or the like.

  In addition, the dehydrogenation apparatus 400 reuses at least one of steam, exhaust gas, and high-temperature air used when generating hydrogen for the conventional thermal power plant to generate power. Thereby, since heat can be used effectively, the fall of the power generation efficiency by using heat with the dehydrogenation apparatus 400 can be suppressed.

  As described above, the present invention can be applied when a conventional thermal power plant (coal-fired power plant) is newly installed, replaced, and when coal fuel is converted to an existing oil-fired power plant. The present invention can also be applied after modification.

  Although the conventional thermal power plant according to the embodiment of the present invention and the modification thereof has been described above, the present invention is not limited to the above-described embodiment and the modification thereof. In other words, it should be considered that the embodiment and its modification disclosed this time are illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  For example, in the embodiment and the modification thereof, the boiler 100 co-fires hydrogen supplied by the dehydrogenation device 400 and coal (pulverized coal) supplied by the fossil fuel supply device 500. However, the fossil fuel supplied by the fossil fuel supply apparatus 500 is not limited to coal, and may be oil fuel such as heavy oil or crude oil, liquefied natural gas (LNG), or the like. That is, the boiler 100 may be a mixture of hydrogen and heavy oil, crude oil, liquefied natural gas, or the like.

  Further, in the above-described embodiment and its modification, the dehydrogenation device 400 includes the exhaust gas inlet or air outlet of the air preheater 700, the inlet or outlet of the denitration device 600, main steam, high-temperature reheat steam, fifth extraction air, Hydrogen was generated using heat extracted from the sixth or eighth extraction. However, as long as the dehydrogenation apparatus 400 can acquire heat at a temperature at which hydrogen can be generated, any system of heat may be used.

  Moreover, in the said embodiment and its modification, the dehydrogenation apparatus 400 decided to supply hydrogen of normal temperature and a normal pressure to the boiler 100. FIG. However, the temperature and pressure of hydrogen supplied to the boiler 100 by the dehydrogenation device 400 are a little lower than normal temperature or a slightly higher temperature, a slightly lower pressure than normal pressure, or a slightly higher pressure. It doesn't matter.

  Moreover, in the said embodiment and its modification, the dehydrogenation apparatus 400 decided to supply the produced | generated hydrogen as hydrogen for cooling of the generator 300. FIG. However, the dehydrogenation device 400 supplies hydrogen to the generator 300 from a conventional hydrogen cylinder without supplying hydrogen to the generator 300 when the amount of generated hydrogen is insufficient. It does not matter if it is configured.

  Moreover, in the said embodiment and its modification, the dehydrogenation apparatus 400 decided to produce | generate hydrogen by dehydrogenating from the hydrogenated organic compound (MCH) using the organic chemical hydride method. . However, in the dehydrogenation apparatus 400, as long as heat can be applied to generate hydrogen, the organic compound to be used is not limited to MCH, and any organic compound may be used. Further, any method can be used as long as it can generate hydrogen by applying heat, without being limited to the organic chemical hydride method.

  Moreover, in the said embodiment and its modification, the control apparatus 20 maintains the quantity of the hydrogen supplied to the boiler 100, changes the quantity of the pulverized coal supplied to the boiler 100, and is in boiler 100. It was decided to adjust the combustion. However, the control device 20 may adjust the combustion in the boiler 100 by keeping the amount of pulverized coal supplied to the boiler 100 constant and changing the amount of hydrogen supplied to the boiler 100. Further, the control device 20 may adjust combustion in the boiler 100 by changing both the amount of hydrogen supplied to the boiler 100 and the amount of pulverized coal.

  Moreover, the form constructed | assembled combining the said embodiment and the said modification arbitrarily is also contained in the scope of the present invention. For example, the dehydrogenation device 400 may generate heat by acquiring heat from a plurality of systems in the embodiment and the modification. Moreover, the dehydrogenation apparatus 400 is connected to a plurality of systems in the embodiment and the modified example, and the control apparatus 20 selects an appropriate system from the plurality of systems to acquire heat. You may decide.

  The present invention can be applied to a conventional thermal power plant such as a conventional coal thermal power plant.

DESCRIPTION OF SYMBOLS 1 Conventional thermal power plant 10 Power generation part 20 Control apparatus 21 Dehydrogenation control part 22 Fuel control part 23 Generator cooling control part 24 Power generation control part 25 Memory | storage part 100 Boiler 110 Main steam pipe 111 Main steam extraction pipe 120 Flue 121 Exhaust gas inlet Pipe 122 Denitration equipment inlet pipe 123 Denitration equipment outlet pipe 124 Eco-conservation equipment 130 Bottom ash treatment equipment 140 High temperature reheat steam pipe 141 High temperature reheat steam extraction pipe 200 Steam turbine 210 High pressure turbine 211 Low temperature reheat steam pipe 212 Seventh extraction pipe 213 Eighth extraction pipe 214 Eighth extraction pipe 220 Medium pressure turbine 221 Fifth extraction pipe 222 Sixth extraction pipe 223 Steam pipe 224 Fifth extraction pipe 225 Sixth extraction pipe 230 Low pressure turbine 231 First extraction pipe 232 First Second extraction pipe 233 Third extraction pipe 234 Fourth extraction pipe 235 Steam pipe 240 Condenser 241 Piping 242 Ground condenser 251 First water heater 252 Second water heater 253 Third water heater 254 Fourth water heater 255 Deaerator 256 Sixth water heater 257 Seventh water heater 258 Eighth water heater 259 piping 300 generator 400 dehydrogenation device 410 MCH input piping 420 toluene outlet piping 430 hydrogen outlet piping 440 boiler supply piping 450 generator supply piping 500 fossil fuel supply device 510 pulverized coal conveyance path 600 denitration device 700 air preheater 710 pushing fan 720 Air inlet duct 730 Air outlet duct 731 High temperature air pipe 740 Steam air preheater 800 Chimney 910 Electric dust collector 920 Suction fan 930 Desulfurization device

Claims (12)

A conventional thermal power plant comprising a boiler and generating electricity by burning fuel in the boiler,
Equipped with a dehydrogenation device that produces hydrogen by dehydrogenation from organic compounds,
The boiler is a conventional thermal power plant that co-fires hydrogen generated by the dehydrogenation device and fossil fuel. The dehydrogenation device performs dehydrogenation by adding heat to at least one of steam, exhaust gas, and high-temperature air generated when the conventional thermal power plant generates power, to the organic compound, The conventional thermal power plant according to claim 1. further,
It has an air preheater that preheats air with exhaust gas,
The dehydrogenation device performs dehydrogenation by adding heat of the exhaust gas or high-temperature air taken out from the exhaust gas inlet or the air outlet of the air preheater to the organic compound to generate hydrogen. The conventional thermal power plant described. further,
Equipped with a denitration device for denitrating exhaust gas,
The conventional thermal power according to claim 2 or 3, wherein the dehydrogenation device generates hydrogen by performing dehydrogenation by adding heat of the exhaust gas taken out from an inlet or an outlet of the denitration device to the organic compound. Power plant. further,
With a steam turbine,
The dehydrogenation device performs dehydrogenation by adding heat to at least one of steam sent from the boiler to the steam turbine and extraction air from the steam turbine, and generates hydrogen. The conventional thermal power plant according to any one of claims 2 to 4. The steam turbine has a high pressure turbine, a medium pressure turbine, and a low pressure turbine,
In the dehydrogenation apparatus, main steam sent from the boiler to the high-pressure turbine, extraction from the high-pressure turbine or the intermediate-pressure turbine, and low-temperature reheated steam that is extraction from the high-pressure turbine are heated by the boiler. The conventional thermal power plant according to claim 5, wherein dehydrogenation is performed by adding heat to at least one of high-temperature reheated steam to the organic compound to generate hydrogen. The dehydrogenation apparatus uses at least one of steam, exhaust gas and high-temperature air used for generating hydrogen, among steam, exhaust gas and high-temperature air used for generating power by the conventional thermal power plant. The conventional thermal power plant according to claim 1, wherein the conventional thermal power plant is supplied as at least one of the following. The conventional thermal power plant according to any one of claims 1 to 7, wherein the dehydrogenation device supplies normal-pressure hydrogen to the boiler. The conventional thermal power plant according to any one of Claims 1 to 8, wherein the dehydrogenation device generates hydrogen by dehydrogenating the hydrogenated organic compound using an organic chemical hydride method. . The conventional thermal power plant according to any one of claims 1 to 9, wherein the boiler co-fires hydrogen and coal generated by the dehydrogenation device. further,
Equipped with a generator,
The conventional thermal power plant according to any one of claims 1 to 10, wherein the dehydrogenation apparatus supplies the produced hydrogen as hydrogen for cooling the generator. A conventional thermal power generation method for generating power by burning fuel in a boiler,
A dehydrogenation step of generating hydrogen by dehydrogenating from an organic compound;
A conventional thermal power generation method including: a co-firing step of co-firing hydrogen generated in the dehydrogenation step and fossil fuel in the boiler.

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