JP2007246305A - Hydrogen production system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydrogen production system reducing the consumption of thermal energy to be supplied by aiming at more effective reutilization of a combustion exhaust gas generated when dimethyl ether which is a raw material is subjected to fuel reforming in the presence of a catalyst to purify hydrogen. <P>SOLUTION: The hydrogen production system comprises a water evaporator 3 which evaporates water, a dimethyl ether preheater 4 which preheats dimethyl ether which is a raw material, a gaseous mixture preheater 5 in which steam from the water evaporator 3 is mixed with dimethyl ether from the dimethyl ether preheater 4, a reformer 6 which reforms the gaseous mixture from the gaseous mixture preheater 5 to a hydrogen-rich gas, and a hydrogen purifier 11 which purifies the reformed gas purified in the reformer 6. The hydrogen production system further comprises a hydrogen-containing exhaust gas supply system 26 which supplies a hydrogen-containing exhaust gas discharged from the hydrogen purifier 11 as a heat source to at least one of the above devices 3, 4, 5, 6, and 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hydrogen production apparatus that uses dimethyl ether as a raw material in the presence of a catalyst and performs steam reforming to purify a hydrogen-rich gas.

  In recent hydrogen purification technologies, for example, when steam reforming is performed using dimethyl ether as a raw material, since dimethyl ether is a synthetic fuel, there are fewer impurities such as sulfur compared to natural gas and liquefied petroleum, etc. Research results have been reported that it can be purified.

  Conventionally, the temperature required for purifying hydrogen is set to 700 ° C. or higher, and the exhaust heat of fossil fuel is used as the heat source. For this reason, in addition to carbon dioxide generated when purifying hydrogen, carbon dioxide is also emitted from combustion exhaust heat. That is, when purifying the reformed hydrogen from the raw material, carbon dioxide is not generated, but much carbon dioxide is purified during the hydrogen production process.

  In addition, when steam reforming the raw material, harmful substances such as sulfur oxides are purified from the combustion exhaust heat used.

  Thus, when purifying hydrogen using dimethyl ether, which has less impact on the environment than natural gas, liquefied petroleum gas, etc., the catalyst used for steam reforming is, for example, Patent Document 1 and Patent Document 2 etc.

  Further, for example, Patent Document 3 discloses a technique of using dimethyl ether that purifies hydrogen at a lower temperature than natural gas and using hydrogen purified from the dimethyl ether as a fuel for a prime mover.

Further, for example, Patent Document 4 discloses a technique for obtaining a steam supply source from a nuclear power plant when steam reforming dimethyl ether to purify hydrogen.
Japanese Patent Laid-Open No. 2003-10585 JP 2003-38957 A JP-A-11-106770 JP 2003-165704 A

  As shown in the above-mentioned patent document, dimethyl ether is used as a raw material, and when a hydrogen-rich gas is purified by steam reforming in the presence of a catalyst, a large amount of heat is supplied from the outside. The heat supplied is not fully utilized.

  For this reason, a new effective hydrogen-rich gas can be purified even when the temperature of the directly supplied heat required for purifying hydrogen is lowered while further effective utilization of heat supplied from the outside is attempted. Technology development is desired.

  The present invention has been made on the basis of such a demand. When purifying a hydrogen-rich gas by reforming a raw material in the presence of a catalyst, the generated flue gas is more effectively reused. Therefore, an object of the present invention is to provide a hydrogen production apparatus that consumes less heat energy.

  In order to achieve the above object, the hydrogen production apparatus according to the present invention includes a water evaporator for evaporating water, a dimethyl ether preheater for preheating dimethyl ether as a raw material, steam from the water evaporator and the dimethyl ether preheating. A mixed gas preheater that mixes dimethyl ether from the reactor, a reformer that reforms the mixed gas from the mixed gas preheater to a hydrogen-rich gas, and a reformed gas purified by the reformer A hydrogen-containing exhaust gas discharged from the hydrogen purifier is supplied as a heat source to at least one of the hydrogen purifier, the water evaporator, the dimethyl ether preheater, the mixed gas preheater, and the reformer. A hydrogen-containing exhaust gas supply system is provided.

  In order to achieve the above-mentioned object, the hydrogen production apparatus according to the present invention includes a water evaporator for evaporating water, a dimethyl ether preheater for preheating dimethyl ether as a raw material, water vapor from the water evaporator, A mixed gas preheater that mixes dimethyl ether from the dimethyl ether preheater, a reformer that reforms the mixed gas from the mixed gas preheater into a hydrogen-rich gas, and a reformed gas purified by the reformer And a carbon monoxide remover for converting oxygen monoxide contained in the reformed gas into carbon dioxide by adding oxygen from the oxygen supply to the cooled reformed gas, and the monoxide A hydrogen purifier for purifying hydrogen after compressing the reformed gas from the carbon remover; the water evaporator; the dimethyl ether preheater; the mixed gas preheater; the reformer; Carbon oxide remover, in which a heat source supply unit for exchanging heat with each of the hydrogen purifier.

  In the hydrogen production apparatus according to the present invention, when purifying hydrogen by reforming a raw material, generated combustion exhaust gas is converted into a water evaporator, a dimethyl ether preheater, a mixed gas preheater, a reformer, and a hydrogen purifier, respectively. As a heat source, the heat energy required for hydrogen production can be saved.

  Hereinafter, embodiments of a hydrogen production apparatus according to the present invention will be described with reference to the drawings and reference numerals attached to the drawings.

  FIG. 1 is a schematic system diagram showing a first embodiment of the hydrogen production apparatus according to the present invention.

  The hydrogen production apparatus according to this embodiment includes a water evaporator 3 that evaporates water 1 as a raw material and a dimethyl ether preheater 4 that preheats dimethyl ether 2 as a raw material.

  Moreover, the hydrogen production apparatus according to the present embodiment mixes the water vapor evaporated by the water evaporator 3 with the dimethyl ether 2 preheated by the dimethyl ether preheater 4 to form a mixed gas, and the mixed gas for preheating the mixed gas again. A preheater 5, a reformer 6 for purifying a hydrogen-rich gas by steam reforming in the presence of a catalyst in the mixed gas exiting the mixed gas preheater 5, and a gas from the reformer 6 A hydrogen purifier 11 for purifying hydrogen is connected in series.

In addition, the hydrogen production apparatus according to the present embodiment includes a heat source supply unit 12, specifically, a water evaporator 3, a dimethyl ether preheater 4, a mixed gas preheater 5, a reformer 6, and a hydrogen purifier 11. Comprises heat transfer piping systems 13a ₁ , 13a ₂ , 13b ₁ , 13b ₂ ,..., 13e ₁ , 13e ₂ for transferring heat from the nuclear power plant, while hydrogen purification during the purification of hydrogen, A hydrogen-containing exhaust gas supply system 26 that supplies the hydrogen-containing exhaust gas discharged from the purifier 11 is provided.

  The heat source supply unit 12 is not limited to a nuclear power plant, but may be an industrial boiler, a thermal power plant, an industrial system having a fuel process, or the like.

On the other hand, in the hydrogen production apparatus according to the present embodiment having the above-described configuration, the dimethyl ether preheater 4 that preheats the dimethyl ether (DME) 2 is supplied from the heat source supply unit 12, specifically, the heat transfer piping system 13 b ₁ from the nuclear power plant. , 13b ₂ and the heat of the hydrogen-containing exhaust gas supplied from the hydrogen purifier 11 via the hydrogen-containing exhaust gas supply system 26, and the dimethyl ether 2 is vaporized from a liquid to a gas. The water evaporator 3 uses the heat supplied from the heat transfer pipe systems 13a ₁ and 13a ₂ of the heat source supply unit 12 and the heat of the hydrogen-containing exhaust gas from the hydrogen-containing exhaust gas supply system 26 as described above. In response, the water 1 is evaporated into steam.

The mixed gas preheater 5 mixes the water vapor from the water evaporator 3 and the gas of dimethyl ether 2 from the dimethyl ether preheater 4 and uses the mixed gas in the same manner as described above for the heat transfer piping systems 13c ₁ and 13c. The heat from ₂ and the heat from the hydrogen-containing exhaust gas supply system 26 are preheated to a temperature of 250 ° C to 300 ° C.

In addition, the reformer 6 adds heat from the heat transfer piping systems 13d ₁ and 13d ₂ and heat from the hydrogen-containing exhaust gas supply system 26 to the preheated mixed gas in the presence of the catalyst, as described above. Steam reforming is performed to purify hydrogen-rich gas.

The hydrogen purifier 11 receives heat from the heat transfer piping systems 13e ₁ and 13e ₂ and purifies the hydrogen-rich gas from the reformer 6 to produce hydrogen.

As described above, in the present embodiment, the heat sources for heating the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, and the reformer 8 are used as the heat transfer / pipe systems 13 a ₁ and 13 a of the heat supply unit 12. ₂ , 13 b ₁ , 13 b ₂ ,..., 13 e ₁ , 13 e ₂ and the exhaust gas from the hydrogen-containing exhaust gas supply system 26 of the hydrogen purifier 11, the generation of carbon dioxide can be further reduced. It is possible to achieve more effective use of waste energy.

  In addition, although this embodiment calculated | required reduction of a carbon dioxide generation | occurrence | production and effective utilization of waste energy utilization to the exhaust gas of a nuclear power plant and the hydrogen purifier 11, it is not restricted to this example, For example, as shown in FIG. In addition, a hydrogen fuel supply system 27 that supplies a part of the hydrogen purified by the hydrogen purifier 11 as fuel may be provided. When used in combination with the hydrogen-containing exhaust gas supply system 26, it is possible to further save the supply heat energy.

  FIG. 3 is a schematic system diagram showing a third embodiment of the hydrogen production apparatus according to the present invention.

  The hydrogen production apparatus according to the present embodiment mixes water vapor from a water evaporator 3 obtained by evaporating water 1 and gas from a dimethyl ether preheater 4 obtained by vaporizing dimethyl ether (DME) 2 in a mixed gas preheater 5. A structure comprising a carbon monoxide remover 9, a compressor 10 and a hydrogen purifier 11 provided with a reformer 6, a cooler 7, and an oxygen supplier 8 in order along the flow of the preheated mixed gas while preheating. It has become.

  Among the above-described components, each of the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, and the hydrogen purifier 11 includes, for example, a power plant, Alternatively, waste heat from an incinerator, specifically, a nuclear power plant is used as a separate heat source supply unit 12, and heat transfer piping systems 13 a, 13 b, 13 c,. Are provided with exhaust heat recovery systems 14a, 14b, 14c,..., 14f for recovering heat of off-gas (exhaust heat of hydrogen-containing exhaust gas) from the exhaust gas piping system 15 of the vessel 11, and recovering heat further. We are trying to effectively reuse heat.

  On the other hand, based on the above-described configuration, water 1 and dimethyl ether 2 purify hydrogen by the reaction formula shown below.

[Chemical 1]
CH ₃ OCH ₃ + 3H ₂ O → 2CO ₂ + 6H ₂ (1)
From this reaction formula (1), the stoichiometric ratio of water to dimethyl ether is 3, so the flow rate of water and dimethyl ether is set based on these values, and the model and volume are selected.

  The reformer 6 is filled with a catalyst that promotes the steam reforming reaction of dimethyl ether.

  The reformer 6 maintains the internal temperature at 250 ° C. or higher, adjusts the reaction pressure to 1 MPa or lower, and contributes to steam reforming of dimethyl ether by the catalyst.

  In the present embodiment, the oxygen supplier 8 supplies oxygen to convert carbon monoxide contained in the reformed gas into carbon dioxide, and the monoxide that converts carbon monoxide into carbon dioxide from the supplied oxygen. Although the case where the carbon remover 9 is provided and an oxidation reaction is used is taken as an example, oxygen may not be used, for example, a shift reaction may be used.

  The reformed gas output from the carbon monoxide remover 9 is compressed by the compressor 10 and supplied to the hydrogen purifier 11.

  The hydrogen purifier 11 that receives the supply of the compressed reformed gas separates hydrogen contained in the reformed gas from components other than hydrogen. As an adsorption method, for example, a PSA method (pressure fluctuation adsorption) is used. Separation method), TSA method (temperature fluctuation adsorption separation method), PTSA method (pressure temperature fluctuation adsorption separation method), or hydrogen separation membrane is selected.

  Further, the hydrogen purifier 11 purifies the hydrogen separated from the reformed gas, and uses the remaining reformed gas as an off-gas, through the exhaust heat recovery systems 14a, 14b,. 3, the dimethyl ether preheater 4, ..., and the hydrogen purifier 11 themselves are recovered.

  As described above, in the present embodiment, the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, and the hydrogen purifier 11 have heat required for water production. , 13f for transferring heat from the external heat source supply unit 12 and the water evaporator from the exhaust gas piping system 15 in the same manner as described above using the combustion gas purified by the hydrogen purifier 11 as off-gas. 3, a waste heat recovery system 14 a, 14 b,..., 14 f that is supplied to each of the dimethyl ether preheater 4, the reformer 6,..., And the like. It is possible to save thermal energy required for manufacturing.

  Further, in the present embodiment, when a nuclear power plant is applied as the heat source supply unit 12, oxygen is not used to generate heat, so that carbon dioxide purified during hydrogen production can be further suppressed. it can.

  FIG. 4 is a schematic system diagram showing a fourth embodiment of the hydrogen production apparatus according to the present invention.

  In addition, the same code | symbol is attached | subjected to the component same as the component of 3rd Embodiment, and duplication description is abbreviate | omitted.

  In the hydrogen production apparatus according to this embodiment, a carbon dioxide recovery unit 16 is provided between the outlet side of the carbon monoxide remover 9 and the inlet side of the compressor 10 to recover carbon dioxide purified during steam reforming. In addition, a heat transfer / pipe system 13g that obtains a heat source to be used at that time from the heat source supply unit 12 and a waste heat recovery system 14g that is obtained from the exhaust gas pipe system 15 are provided.

  The carbon dioxide recovery unit 16 is preferably one having an application temperature lower than that of the hydrogen purifier 11, and an amine method using an alcohol amine solution, a thermal alkali method using alkali salts, or the like is selected.

  Thus, in the present embodiment, the carbon dioxide recovery unit 16 is provided between the outlet side of the carbon monoxide remover 9 and the inlet side of the compressor 10, and the carbon dioxide recovery unit 16 includes the reformed gas. Since the carbon dioxide is separated and the reformed gas from which the carbon dioxide is separated is supplied to the hydrogen purifier 11, the carbon resource contained in the raw material dimethyl ether can be used effectively, and the hydrogen purifier 11 Thus, the off-gas from the exhaust gas piping system 15 in which carbon dioxide is reduced can be reused again for carbon dioxide separation, which can contribute to a reduction in the consumption of heat energy.

  FIG. 5 is a schematic system diagram showing a fifth embodiment of the hydrogen production apparatus according to the present invention.

  In addition, the same code | symbol is attached | subjected to the component same as the component of 3rd Embodiment, and duplication description is abbreviate | omitted.

  The hydrogen production apparatus according to this embodiment includes a water evaporator 3, a dimethyl ether preheater 4, a mixed gas preheater 5, a reformer 6, a carbon monoxide remover 9, a hydrogen purifier 11, and a carbon dioxide collector 16. The heat transfer piping systems 13a, 13b,..., 13g that receive heat necessary for hydrogen production from the external heat source supply unit 12 and the combustion gas containing unburned hydrogen gas generated during the hydrogen purification in the hydrogen purifier 11 As an off-gas, from the exhaust gas piping system 15 to the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, the hydrogen purifier 11, and the carbon dioxide collector 16. While providing exhaust heat recovery systems 14a, 14b,..., 14g to be supplied, water evaporator 3, dimethyl ether preheater 4, mixed gas preheater 5, reformer 6, carbon monoxide remover 9, hydrogen purifier 1, the carbon dioxide recovery unit 16 of superheating the auxiliary fuel supply system for supplying a heating auxiliary fuel respectively 17, 17a, 17b, ..., provided 17 g.

  As described above, the present embodiment is applied to each of the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, the hydrogen purifier 11, and the carbon dioxide collector 16. Since the auxiliary heating fuel supply systems 17, 17a, 17b, ..., 17g for supplying the auxiliary heating fuel are provided, the heat transfer piping systems 13a, 13b, ..., 13g and the exhaust heat recovery systems 14a, 14b, ..., 14g are provided. Even if there is an instability such as a small amount of heat supplied from the heat source, an appropriate amount of heat can be reliably supplied, and stable hydrogen can be purified.

  In this embodiment, the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, the hydrogen purifier 11, and the carbon dioxide collector 16 are heated. Although the auxiliary fuel supply systems 17, 17 a, 17 b,..., 17 g for supplying auxiliary fuel are provided, not limited to this example, for example, as shown in FIG. Dimethyl ether auxiliary fuel supply systems 18, 18 a, 18 b for supplying dimethyl ether as auxiliary heating fuel to the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, the carbon dioxide collector 16, and the hydrogen purifier 11. , ..., 18g. In the embodiment shown in FIG. 5 and FIG. 6, a configuration is adopted in which auxiliary fuel is supplied to all the components. However, auxiliary fuel may be supplied to some of the components as necessary. Good.

  FIG. 7 is a schematic system diagram showing a seventh embodiment of the hydrogen production apparatus according to the present invention.

  In addition, the same code | symbol is attached | subjected to the component same as the component of 3rd Embodiment, and duplication description is abbreviate | omitted.

  When the hydrogen production apparatus according to this embodiment uses the hydrogen-containing off-gas emitted from the hydrogen purifier 11 again as a combustion gas, the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, and the reformer 6 are used. , The carbon monoxide remover 9, the hydrogen purifier 11, and the carbon dioxide recovery unit 16, the combustion exhaust gas from the combustion exhaust gas systems 19 a, 19 b,. A combustion exhaust gas recovery system 20 to be recovered is provided.

  Thus, in this embodiment, each of the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, the hydrogen purifier 11, and the carbon dioxide collector 16 is provided. When carbon dioxide is included when reusing hydrogen-containing off-gas as a combustion gas from the hydrogen purifier 11, the carbon dioxide contained in the combustion gas after the combustion is collected and collected together. Since the combustion exhaust gas recovery system 20 to be processed by the recovery unit 16 is provided, it is possible to reuse the exhaust gas generated during the hydrogen purification, and to save energy by reducing the consumption of heat energy required for the hydrogen purification. Can do.

  FIG. 8 is a schematic system diagram showing an eighth embodiment of the hydrogen production apparatus according to the present invention.

  In addition, the same code | symbol is attached | subjected to the component same as the component of 3rd Embodiment, and duplication description is abbreviate | omitted.

  The hydrogen production apparatus according to this embodiment includes a water evaporator 3, a dimethyl ether preheater 4, a mixed gas preheater 5, a reformer 6, a carbon monoxide remover 9, a carbon dioxide recovery device 16, and a hydrogen purifier 11. When the hydrogen-containing off-gas from the hydrogen purifier 11 and dimethyl ether as auxiliary fuel supplied from the dimethyl ether auxiliary fuel supply systems 18, 18a,. Burned from the flue gas systems 19a, 19b,..., 19g included in the gas generator 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, the hydrogen purifier 11, and the carbon dioxide recovery unit 16, respectively. A combustion exhaust gas recovery system 20 is provided in which gases are collected into one and recovered by the carbon dioxide recovery device 16.

  Thus, in this embodiment, each of the water evaporator 3, the dimethyl ether preheater 4, the mixed gas preheater 5, the reformer 6, the carbon monoxide remover 9, the hydrogen purifier 11, and the carbon dioxide collector 16 is provided. The off-gas from the hydrogen purifier 11 and the dimethyl ether from the dimethyl ether auxiliary fuel supply systems 18, 18a,..., 18g are co-fired or burnt together, and the carbon dioxide contained in the combustion gas after the combustion is combined into one. The combustion exhaust gas recovery system 20 to be recovered and processed by the carbon dioxide recovery unit 16 is provided to reuse the exhaust gas, so that the consumption of heat energy required for hydrogen purification can be reduced and energy can be saved. .

  FIG. 9 is a schematic system diagram showing a ninth embodiment of the hydrogen production apparatus according to the present invention.

  In addition, the same code | symbol is attached | subjected to the component same as the component of 3rd Embodiment, and duplication description is abbreviate | omitted.

  The hydrogen production apparatus according to the present embodiment purifies hydrogen by steam reforming dimethyl ether (raw material) 2 under the catalyst with heat supplied from the heat source supply unit 12 to the reformer 6 via the heat supply piping system 21. Then, the combustion gas generated simultaneously with the purification of hydrogen is sent as a preheating source to the dimethyl ether preheater 4 to preheat the dimethyl ether 2, and the dimethyl ether preheater 4 supplies heat after preheating the dimethyl ether 2 to the heat source. A heat recovery system 23 to be recovered by the unit 12 is provided.

  As described above, in the present embodiment, the heat generated by using the dimethyl ether 2 for steam reforming in the reformer 6 is utilized again, and the dimethyl ether preheating source supply system 22 for preheating the dimethyl ether 2 and the heat after preheating of the dimethyl ether 2 are used. Since the heat recovery system 23 to be recovered by the heat source supply unit 12 is provided so as to reuse the exhaust heat energy, it is possible to save energy by reducing the consumption of heat energy required for hydrogen purification.

  FIG. 10 is a schematic system diagram showing a tenth embodiment of the hydrogen production apparatus according to the present invention.

  In addition, the same code | symbol is attached | subjected to the component same as the component of 3rd Embodiment, and duplication description is abbreviate | omitted.

  The hydrogen production apparatus according to the present embodiment includes a water preheating supply system 24 that preheats water supplied to the water evaporator 3 by using heat radiation from the cooler 7.

  As described above, the present embodiment includes the water preheating supply system 24 that connects the cooler 7 and the water evaporator 3, and preheats the water supplied to the water evaporator 3 using the heat radiation of the cooler 7. With this configuration, it is possible to save energy by reducing the consumption of heat energy required for hydrogen purification by effectively using exhaust heat.

  FIG. 11 is a schematic system diagram showing an eleventh embodiment of the hydrogen production apparatus according to the present invention.

  In addition, the same code | symbol is attached | subjected to the component same as the component of 3rd Embodiment, and duplication description is abbreviate | omitted.

  The hydrogen production apparatus according to the present embodiment supplies oxygen from the oxygen supplier 8 to the carbon monoxide remover 9, converts carbon monoxide into carbon dioxide, and supplies oxygen to the reformer 6, An oxygen supply system 25 that enables a partial oxidation reaction of dimethyl ether 2 is provided.

  In the present embodiment, an oxygen supply system 25 that supplies oxygen from the oxygen supplier 8 to the reformer 6 is provided, and in addition to steam reforming of the raw material dimethyl ether 2, partial oxidation can also be performed. You can expand your choice and increase your convenience.

1 is a schematic system diagram showing a first embodiment of a hydrogen production apparatus according to the present invention. The schematic system diagram which shows 2nd Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 3rd Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 4th Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 5th Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 6th Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 7th Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 8th Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 9th Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 10th Embodiment of the hydrogen production apparatus which concerns on this invention. The schematic system diagram which shows 11th Embodiment of the hydrogen production apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water 2 Dimethyl ether 3 Water evaporator 4 Dimethyl ether preheater 5 Mixed gas preheater 6 Reformer 7 Cooler 8 Oxygen supply device 9 Carbon monoxide removal device 10 Compressor 11 Hydrogen purifier 12 Heat source supply part 13a, 13a ₁ , 13 a ₂ , 13 b, 13 b ₁ , 13 b ₂ , 13 c, 13 c ₁ , 13 c ₂ ,... Heat transfer piping system 14 a, 14 b, 14 c,. 17c, ... Auxiliary fuel supply system for heating 18, 18a, 18b, 18c, ... Dimethyl ether auxiliary fuel supply system 19a, 19b, 19c, ... Combustion exhaust gas system 20 Combustion exhaust gas recovery system 21 Heat recovery system 24 Water preheating supply system 25 Oxygen supply system 26 Hydrogen-containing exhaust gas supply system 2 Hydrogen fuel supply system

Claims (13)

A water evaporator for evaporating water, a dimethyl ether preheater for preheating dimethyl ether as a raw material, a mixed gas preheater for mixing water vapor from the water evaporator and dimethyl ether from the dimethyl ether preheater, and this mixed gas preheating A reformer for reforming the mixed gas from the reformer into a hydrogen-rich gas, a hydrogen purifier for purifying the reformed gas purified by the reformer, the water evaporator, the dimethyl ether preheater, and the mixing Among the gas preheater, the reformer, and the hydrogen purifier, at least one of a heat source supply unit, the water evaporator, the dimethyl ether preheater, the mixed gas preheater, and the reformer. A hydrogen-containing exhaust gas supply system that supplies at least one hydrogen-containing exhaust gas discharged from the hydrogen purifier as a heat source; Apparatus. A water evaporator for evaporating water, a dimethyl ether preheater for preheating dimethyl ether as a raw material, a mixed gas preheater for mixing water vapor from the water evaporator and dimethyl ether from the dimethyl ether preheater, and this mixed gas preheating A reformer for reforming the mixed gas from the reformer into a hydrogen-rich gas, a hydrogen purifier for purifying the reformed gas purified by the reformer, the water evaporator, the dimethyl ether preheater, and the mixing Among the gas preheater, the reformer, and the hydrogen purifier, at least one of a heat source supply unit, the water evaporator, the dimethyl ether preheater, the mixed gas preheater, and the reformer. A hydrogen fuel supply system for supplying a part of the hydrogen purified by the hydrogen purifier as fuel to one or more and a hydrogen-containing exhaust discharged from the hydrogen purifier Hydrogen production apparatus is characterized in that a hydrogen-containing gas supply system for supplying a heat source scan. A water evaporator for evaporating water, a dimethyl ether preheater for preheating dimethyl ether as a raw material, a mixed gas preheater for mixing water vapor from the water evaporator and dimethyl ether from the dimethyl ether preheater, and this mixed gas preheating A reformer for reforming the mixed gas from the reformer to a hydrogen-rich gas, a cooler for cooling the reformed gas purified by the reformer, and oxygen from the oxygen supplier to the cooled reformed gas And a carbon monoxide remover that converts carbon monoxide contained in the reformed gas into carbon dioxide, and hydrogen that purifies the hydrogen after compressing the reformed gas from the carbon monoxide remover Heat sources for transferring heat to and from the purifier, the water evaporator, the dimethyl ether preheater, the mixed gas preheater, the reformer, the carbon monoxide remover, and the hydrogen purifier Hydrogen production apparatus is characterized in that a feed portion. 4. The hydrogen production apparatus according to claim 3, wherein the hydrogen purifier uses the exhaust gas emitted from the hydrogen purifier as a heat source, the water evaporator, the dimethyl ether preheater, the mixed gas preheater, the reformer, and the carbon monoxide remover. A hydrogen production apparatus comprising an exhaust gas piping system that supplies each of the hydrogen purifiers. 4. The hydrogen production apparatus according to claim 3, wherein the carbon monoxide remover is provided with a carbon dioxide recovery device on the outlet side. 3. The hydrogen production apparatus according to claim 2, wherein the carbon dioxide recovery device includes an exhaust gas piping system that is connected to a heat source supply unit that transfers heat and receives exhaust gas from the hydrogen purifier as a heat source. 7. The hydrogen production apparatus according to claim 3, wherein the water evaporator, the dimethyl ether preheater, the mixed gas preheater, the reformer, the carbon monoxide remover, the carbon dioxide recovery device, and the hydrogen purifier. Of these, at least one or more of them is provided with an auxiliary fuel supply system for heating. 7. The hydrogen production apparatus according to claim 3, wherein the water evaporator, the dimethyl ether preheater, the mixed gas preheater, the reformer, the carbon monoxide remover, the carbon dioxide recovery device, and the hydrogen purifier. Of these, at least one or more of them is provided with a dimethyl ether auxiliary fuel supply system. 7. The hydrogen production apparatus according to claim 3, wherein the water evaporator, the dimethyl ether preheater, the mixed gas preheater, the reformer, the carbon monoxide remover, the carbon dioxide recovery device, and the hydrogen purifier. A hydrogen production apparatus comprising a combustion exhaust gas recovery system that causes the carbon dioxide recovery unit to recover combustion exhaust gas discharged from each of the above. 4. The hydrogen production apparatus according to claim 3, wherein the heat source supply unit reforms dimethyl ether into a hydrogen-rich gas with a heat source supplied to the reformer, and then supplies the exhaust heat to the dimethyl ether preheater. 5. An apparatus for producing hydrogen, comprising: a supply system; and a heat recovery system that recovers the exhaust heat from the dimethyl ether preheater after preheating the dimethyl ether. 4. The hydrogen production apparatus according to claim 3, wherein the cooler includes a water preheating supply system for supplying preheated water to the water evaporator. 4. The hydrogen production apparatus according to claim 3, wherein the oxygen supply unit includes an oxygen supply system for supplying oxygen to the reformer. The hydrogen production apparatus according to claim 1, wherein the heat source supply unit is a nuclear power plant.

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