WO2007132693A1 - 水素製造におけるドレン水の処理方法および水素製造システム - Google Patents
水素製造におけるドレン水の処理方法および水素製造システム Download PDFInfo
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- WO2007132693A1 WO2007132693A1 PCT/JP2007/059465 JP2007059465W WO2007132693A1 WO 2007132693 A1 WO2007132693 A1 WO 2007132693A1 JP 2007059465 W JP2007059465 W JP 2007059465W WO 2007132693 A1 WO2007132693 A1 WO 2007132693A1
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- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/323—Catalytic reaction of gaseous or liquid organic compounds other than hydrocarbons with gasifying agents
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- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
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- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
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- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
- C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
- C01B2203/0233—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being a steam reforming step
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- C01B2203/025—Processes for making hydrogen or synthesis gas containing a partial oxidation step
- C01B2203/0261—Processes for making hydrogen or synthesis gas containing a partial oxidation step containing a catalytic partial oxidation step [CPO]
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- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0811—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel
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- C01B2203/0811—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel
- C01B2203/0827—Methods of heating the process for making hydrogen or synthesis gas by combustion of fuel at least part of the fuel being a recycle stream
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Definitions
- the present invention relates to a method for treating drain water generated when industrially producing hydrocarbon-based raw material hydrogen, and a hydrogen production system for appropriately performing the method for treating drain water.
- Hydrogen (high-purity hydrogen) is used in many industrial fields such as metal heat treatment, glass melting, semiconductor manufacturing, and optical fiber manufacturing. Hydrogen is also used as fuel for fuel cells.
- Patent Document 1 An example of a hydrogen production system for industrially producing hydrogen is described in Patent Document 1 below.
- the hydrogen production system described in Patent Document 1 includes a vaporizer, a reforming reactor, a gas-liquid separator, and a pressure fluctuation adsorption type gas separation device, and uses a hydrocarbon-based raw material as a main raw material. It is comprised so that it may manufacture.
- the vaporizer is for heating a mixed raw material containing hydrocarbon-based raw materials such as methanol and natural gas, water, and oxygen to a vaporized state before supplying them to the reforming reactor.
- the mixed raw material flowing through the carburetor is heated to a desired temperature using a high-temperature combustion gas generated by the combustion of fuel as a heat source.
- the reforming reactor is used for generating a reformed gas (including hydrogen) by reforming the mixed raw material in a vaporized state.
- a steam reforming reaction that is an endothermic reaction and a partial oxidation reforming reaction that is an exothermic reaction occur simultaneously.
- hydrogen as a main product and carbon dioxide as a by-product are generated from methanol and water.
- the partial oxidation reforming reaction for example, hydrogen as a main product and carbon dioxide as a by-product are generated from methanol and oxygen.
- the gas-liquid separator separates and removes liquid components mixed in the reformed gas before the reformed gas generated in the reforming reactor is introduced into the pressure fluctuation adsorption gas separation device described later.
- the liquid component is discharged as drain water.
- the composition of the mixed raw material is adjusted to balance the endothermic amount due to the steam reforming reaction and the exothermic amount due to the partial oxidation reforming reaction. As a result, an autothermal reforming reaction is performed in which the reaction temperature in the reforming reactor is maintained substantially constant.
- Patent Document 1 International Publication WO2006Z006479 Pamphlet
- the pressure fluctuation adsorption gas separation device is for desorbing unnecessary components other than hydrogen contained in the reformed gas and deriving a hydrogen-enriched gas as a product gas.
- gas separation is performed by the pressure fluctuation adsorption gas separation method (PSA separation method).
- PSA separation method pressure fluctuation adsorption gas separation method
- the reformed gas that has passed through the gas-liquid separator is introduced into the adsorption tower to adsorb unnecessary components in the reformed gas under high pressure conditions, and the hydrogen enriched gas from the adsorption tower.
- the inside of the adsorption tower is depressurized to desorb unnecessary components from the adsorbent, and a gas (off-gas) containing hydrogen and the unnecessary components remaining in the tower is discharged from the adsorption tower.
- the cleaning gas is passed through the adsorption tower, so that the adsorption performance of the adsorbent with respect to unnecessary components is recovered.
- the reformed gas from which the liquid component has been removed by passing through the gas-liquid separator is introduced into the adsorption tower, so that the liquid component in the reformed gas is introduced into the adsorption tower. Can be prevented from being introduced. As a result, it is possible to suppress the deterioration of the adsorbent due to the liquid component coming into contact with the adsorbent in the adsorption tower.
- off-gas discharged from the adsorption tower is supplied to a vaporizer as a combustion fuel (a fuel for vaporizing a mixed raw material).
- a combustion fuel a fuel for vaporizing a mixed raw material.
- hydrogen gas contained in the off-gas burns, and high-temperature combustion gas is generated by the combustion.
- the mixed raw material flowing through the vaporizer is heated using the combustion gas as a heat source and is in a vaporized state.
- the combustion gas is released into the atmosphere after being used to heat the mixed raw material in this way.
- the hydrogen production system described in Patent Document 1 continues to evaporate the mixed raw material only by the self-supplied heat accompanying the system operation during the normal operation, and the inside of the reforming reactor has a desired temperature. Is maintained. According to such a heat self-supporting hydrogen production system, it is possible to efficiently produce hydrogen by avoiding an inefficient method of continuously heating external fuel and heating the mixed raw material and the reforming reactor.
- the drain water removed through the gas-liquid separator is mainly water contained in the mixed raw material, and methanol is used as the hydrocarbon-based raw material constituting the mixed raw material.
- the drain water may contain unreacted methanol.
- a dedicated drain water treatment facility is provided separately, or a drain water storage facility is provided and drain water collected in the storage facility is collected. It is necessary to hand it over to the contractor as industrial waste.
- the present invention has been conceived under such circumstances, and during steady operation, the mixed raw material is continuously heated and vaporized only by the self-supplied heat that accompanies the system operation, and in the reforming reactor.
- the drain water generated by the operation of the system should be treated efficiently while controlling the treatment cost. It is an object to provide a method capable of
- Another object of the present invention is to provide a system capable of appropriately performing such a processing method.
- the vaporized step for heating and vaporizing the mixed raw material containing the hydrocarbon-based raw material, and the vaporized mixing by the reforming reaction of the hydrocarbon-based raw material.
- a reforming reaction step for generating a reformed gas containing hydrogen from the raw material, and a liquid component mixed in the reformed gas is separated and removed from the gas, and the liquid component is discharged as drain water.
- Gas-liquid separation step and a pressure fluctuation adsorption gas separation method using an adsorption tower filled with an adsorbent, and the reformed gas introduced through the gas-liquid separation step is introduced into the adsorption tower.
- Unnecessary components in the gas are adsorbed on the adsorbent, the hydrogen-enriched gas is led out from the adsorption tower, and the unnecessary components are desorbed from the adsorbent, and the hydrogen remaining in the adsorption tower and the unnecessary Pressure fluctuation adsorption system for exhausting off-gas containing components
- the offgas discharged from the adsorption tower is burned, and the mixed raw material is heated using the combustion gas generated by the combustion as a heat source.
- the drain water further comprising an evaporation step for evaporating the drain water discharged through the gas-liquid separation step using the combustion gas after heating the mixed raw material as a heat source.
- the drain water discharged through the gas-liquid separation step can be gasified and released into the atmosphere by being subjected to an evaporation step.
- the combustion gas after heating the mixed raw material in the vaporization step is used as a heat source for evaporating the drain water. Therefore, in this treatment method, since the drain water can be treated using only the self-supplied heat related to hydrogen production, the drain water can be treated efficiently while suppressing the treatment cost.
- the treatment method further includes a decomposition step for catalytically decomposing harmful components contained in the gas generated by the evaporation step.
- the harmful components are gasified through the evaporation step and then decomposed by the decomposition step to be rendered harmless. Therefore, according to this treatment method, even if the drain water contains harmful components, the drain water can be treated efficiently and appropriately.
- the present processing method further includes a heat exchange step of preheating the mixed raw material before undergoing the vaporization step by heat exchange with the reformed gas before undergoing the gas-liquid separation step. . By this heat exchange process, the heat energy of the high-temperature reformed gas can be transferred to the mixed raw material before it undergoes the vaporization process, so that the amount of additional heat necessary for the vaporization process can be reduced.
- a vaporizer for heating a mixed raw material containing a hydrocarbon-based raw material into a vaporized state, and the above-mentioned vaporization by a reforming reaction of the hydrocarbon-based raw material.
- a reforming reactor for generating a reformed gas containing hydrogen and a liquid component mixed in the reformed gas are separated and removed from the gas, and the liquid component is drained.
- the reformed gas that has passed through the gas-liquid separator is introduced into the adsorption tower by a gas-liquid separator for discharging as water and a pressure-fluctuation adsorption gas separation method using an adsorption tower filled with an adsorbent. Then, the unnecessary components in the reformed gas are adsorbed on the adsorbent, the hydrogen-enriched gas is led out from the adsorption tower, and the unnecessary components are desorbed from the adsorbent and remain in the adsorption tower. Pressure fluctuation for exhausting off-gas containing hydrogen and unnecessary components And the vaporizer is configured to burn off gas discharged from the adsorption tower and to heat the mixed raw material using the combustion gas generated by the combustion as a heat source. Further, the hydrogen production system is provided with an evaporation means for evaporating the drain water discharged from the gas-liquid separator using the combustion gas after heating the mixed raw material as a heat source. A system is provided.
- the method of the first aspect of the present invention can be appropriately performed. Therefore, according to the present hydrogen production system, the same effects as described above with respect to the first aspect of the present invention can be achieved in the process of drain water in hydrogen production.
- the hydrogen production system further includes a decomposition means for decomposing a harmful component contained in the gas generated by the evaporation means by catalytic action.
- the evaporating unit and the decomposing unit are provided in a common container, and the decomposing unit is disposed downstream of the evaporating unit.
- the container includes a jacket part to which drain water is supplied from the gas-liquid separator on an outer periphery, and the jacket part communicates with the evaporation means in the container.
- the evaporation means is an evaporation tower having a bottomed tubular structure.
- the decomposition means includes an oxidation catalyst.
- the hydrogen production system is configured to preheat the mixed raw material before being supplied to the vaporizer by exchanging heat with the reformed gas before being supplied to the gas-liquid separator. It further includes an exchanger.
- FIG. 1 is a schematic configuration diagram showing a hydrogen production system according to the present invention.
- Fig. 1 shows a hydrogen production system XI according to an embodiment of the present invention.
- the hydrogen production system XI consists of a vaporizer 1, a reforming reactor 2, a heat exchanger 3, a gas-liquid separator 4, a pressure fluctuation adsorption gas separator (PSA separator) 5, and a drain water treatment And is configured to produce hydrogen using methanol, which is a hydrocarbon-based raw material, as a main raw material.
- PSA separator pressure fluctuation adsorption gas separator
- the vaporizer 1 includes a main body container 11, a supply pipe 12, a catalytic combustion unit 13, and a flow pipe 14.
- the mixed material containing methanol, water, and oxygen is heated and vaporized.
- FIG. 1 the internal structure of the vaporizer 1 is schematically shown.
- the main body container 11 has a closed-end tubular structure, and a combustion gas discharge port 111 is provided at an upper end portion thereof.
- the supply pipe 12 has a double pipe structure including an outer pipe 121 and an inner pipe 122.
- the outer pipe 121 has an upper end connected to the pipe 71 outside the main body container 11, and a lower end opened in the main body container 11.
- the inner pipe 122 has an upper end connected to the pipe 73 and the pipe 82 outside the main body container 11, and a lower end opened in the outer pipe 121.
- the pipe 71 connected to the outer pipe 121 is also connected to the air blower 72.
- the pipe 73 connected to the inner pipe 122 is connected to a supply source (not shown) of vaporizing fuel (for example, LPG: liquefied petroleum gas) for starting operation, and this pipe 73 includes an automatic valve. 73a is provided.
- the catalyst combustion unit 13 is provided at the lower end portion in the outer pipe 121, and catalytically burns hydrogen and the above-mentioned fuel for starting operation to generate high-temperature combustion gas.
- the catalyst combustion section 13 is filled with a combustion catalyst. Examples of combustion catalysts include platinum-based platinum and palladium. A catalyst is mentioned.
- the distribution pipe 14 has a raw material inlet end 141 and a raw material outlet end 142, and has a spiral part surrounding the supply pipe 12 in part.
- the raw material introduction end 141 comes out of the lower end force of the main body container 11 and out of the main body container 11.
- the upper end force of the main body container 11 is also out of the main body container 11.
- a heat storage material (not shown) is filled around the supply pipe 12 and the circulation pipe 14 in the main body container 11 as necessary.
- the reforming reactor 2 has a main body container 21 and a reforming reaction unit 22.
- This reforming reactor 2 reforms methanol in the mixed raw material vaporized in the vaporizer 1 by combining the steam reforming reaction and partial oxidation reforming reaction of methanol, and contains hydrogen. The reformed gas is generated.
- the main body container 21 has a closed-end tubular structure, a raw material inlet 211 is provided at the lower end thereof, and a reformed gas outlet 212 is provided at the upper end thereof.
- the raw material inlet 211 is connected to the raw material outlet 142 of the vaporizer 1.
- the reforming reaction section 22 is provided inside the main body container 21 and is a portion filled with a reforming catalyst (not shown).
- This reforming catalyst causes steam reforming reaction and partial acid reforming reaction to occur simultaneously with respect to methanol in the mixed raw material in a vaporized state.
- a reforming catalyst for example, a mixture containing aluminum oxide, copper oxide and zinc oxide can be employed.
- the content ratio of the above components in the reforming catalyst is, for example, CuO force 2 wt%, ZnO 47 wt%, and Al O force SlO wt%.
- the heat exchanger 3 has a methanol water inlet 31, a methanol water outlet 32, a reformed gas inlet 33, and a reformed gas outlet 34.
- the methanol water is preheated and the reformed gas is cooled by heat exchange between the methanol water before being supplied to the vaporizer 1 and the reformed gas generated in the reforming reactor 2.
- a path is provided for heat exchange between these two types of paths.
- the heat exchanger 3 is useful for reducing the heat energy required when the mixed raw material is heated to a vaporized state in the vaporizer 1.
- the methanol water inlet 31 is connected to a methanol water supply source (not shown) via a pipe 74 and a pump 75.
- the pump 75 delivers methanol water at a predetermined pressure.
- the methanol water outlet 32 is connected to the raw material introduction end 141 of the vaporizer 1 through a pipe 76. Yes.
- One end of the pipe 77 is connected to the pipe 76.
- the other end of the pipe 77 is connected to a supply source (not shown) of an oxygen-containing gas (for example, oxygen-enriched gas or air).
- the pipe 77 is provided with a flow rate control valve 77a for adjusting the flow rate of the oxygen-containing gas.
- the reformed gas inlet 33 is connected to the reformed gas outlet 212 of the reforming reactor 2 via a pipe 78.
- the reformed gas outlet 34 is connected to a gas-liquid separator 4 described later via a pipe 79.
- the gas-liquid separator 4 has a drain water discharge port 41, and gas-liquid separates liquid components (for example, water and unreacted methanol) 42 mixed in the reformed gas from the gas.
- the drain water discharge port 41 discharges the liquid component 42 collected in the gas-liquid separator 4 to the outside of the gas-liquid separator 4 as drain water.
- the PSA separation device 5 includes at least one adsorption tower filled with an adsorbent, and is enriched with hydrogen from the reformed gas by a pressure fluctuation adsorption gas separation method (PSA separation method) performed using the adsorption tower.
- PSA separation method pressure fluctuation adsorption gas separation method
- the gas can be taken out.
- adsorbent filled in the adsorption tower for example, a zeolite adsorbent, a carbon adsorbent, or an alumina adsorbent can be employed, and a zeolite adsorbent is preferably employed.
- the adsorption tower may be filled with one kind of adsorbent, or may be filled with plural kinds of adsorbents.
- a cycle including an adsorption process, a desorption process, and a regeneration process is repeated.
- the reformed gas is introduced into the adsorption tower where the inside of the tower is at a predetermined high pressure, and unnecessary components (carbon monoxide, carbon dioxide, nitrogen, etc.) in the reformed gas are adsorbed to the adsorbent.
- the adsorption tower power hydrogen-enriched gas is derived.
- the inside of the adsorption tower is depressurized to desorb the adsorbent power unnecessary components, and the off-gas containing hydrogen remaining in the adsorption tower and the unnecessary components is discharged to the outside.
- the adsorption performance of the adsorbent for unnecessary components is restored by passing a cleaning gas through the adsorption tower, for example, to prepare the adsorption tower for the second adsorption process.
- a PSA separator 5 a known PSA hydrogen separator can be used.
- the drain water treatment device 6 includes a main body container 61, a jacket portion 62, an evaporation tower 63, and a catalyst decomposition portion 64.
- the drain water treatment device 6 evaporates the drain water discharged from the four gas-liquid separators and decomposes a gas (evaporated gas) generated by the evaporation by a catalytic action.
- a gas evaporated gas generated by the evaporation by a catalytic action.
- FIG. 1 the internal structure of the drain water treatment device 6 is schematically shown.
- the main body container 61 has a tubular shape with an open end at the top, and a combustion gas inlet 611 is provided at the lower end thereof.
- the combustion gas introduction port 611 is connected to the combustion gas discharge port 111 of the carburetor 1 through the pipe 91, and introduces the combustion gas discharged from the combustion gas discharge port 111 into the main body container 61.
- the jacket portion 62 is formed in an annular shape so as to surround the outer periphery of the main body container 61, and a drain water inlet 621 is provided at the lower end portion thereof.
- the drain water inlet 621 is connected to the drain water outlet 41 via a pipe 92 and introduces drain water into which the gas / liquid separator 4 force is discharged to the jacket portion 62.
- the pipe 92 is provided with a flow rate control valve 92a for adjusting the flow rate of the drain water.
- the evaporation tower 63 has a bottomed tubular structure and is provided in the lower part of the main body container 61. The lower end portion of the evaporation tower 63 is connected to the jacket portion 62 via the communication pipe 631, and the upper end portion is opened in the main body container 61.
- the catalyst decomposition unit 64 is provided above the evaporation tower 63 in the main body container 61, and decomposes harmful components contained in the evaporation gas by catalytic action.
- the catalytic cracking section 64 is filled with a cracking catalyst that exerts a catalytic action on the harmful component. Examples of the decomposition catalyst include platinum-based acid catalysts such as platinum and palladium when methanol is decomposed.
- the pump 75 is activated, whereby methanol water of a predetermined concentration is introduced into the heat exchanger 3 from the methanol water inlet 31 via the pipe 74.
- methanol water at a relatively low temperature for example, 10 to 25 ° C
- the reformed gas at a relatively high temperature for example, 230 to 270 ° C.
- it is heated (preheated) to 137 ° C by heat exchange.
- the methanol water preheated in the heat exchanger ⁇ 3 is led out of the heat exchanger 3 from the methanol water outlet 32 and contains oxygen which is introduced into the pipe 76 through the pipe 77 when passing through the pipe 76.
- Mixed with gas eg oxygen-enriched gas or air.
- the supply amount of the oxygen-containing gas can be adjusted by the flow control valve 77a.
- the mixed raw material (including methanol, water, and oxygen) obtained in this way is introduced into the flow pipe 14 of the vaporizer 1 from the raw material introduction end 141.
- the mixed raw material is vaporized.
- the mixed raw material introduced into the distribution pipe 14 passes through the distribution pipe 14.
- a desired reaction temperature for example, 230 to 270 ° C
- the vaporized mixed raw material is led out of the vaporizer 1 from the raw material outlet end 142 of the flow pipe 14 and supplied to the reforming reactor 2 via the raw material inlet end 211.
- the mixed raw material supplied to the reforming reactor 2 is introduced into the reforming reaction section 22.
- the mixed raw material undergoes a reforming reaction.
- the steam reforming reaction of methanol which is an endothermic reaction
- the partial oxidation reforming reaction of methanol which is an exothermic reaction
- Quality gas is generated.
- the proportion of methanol consumed in each reaction that is, the steam reforming reaction and a part thereof
- the reaction temperature for example, 230 to 270 ° C.
- the ratio of oxidation reforming reaction is set.
- the autothermal reforming reaction of methanol proceeds.
- the reformed gas generated in the reforming reaction section 22 is led out of the reforming reactor 2 from the reforming gas outlet 212, and enters the heat exchanger 3 through the pipe 78 and the reformed gas inlet 33. be introduced.
- the reformed gas having a relatively high temperature for example, 230 to 270 ° C
- the heat exchanger ⁇ 3 for example, 10 to 25 ° C
- It is cooled to 40 ° C, for example, by heat exchange with C) methanol water.
- the reformed gas cooled in the heat exchanger 3 is led out of the heat exchanger 3 from the reformed gas outlet 34 and introduced into the gas-liquid separator 4 through the pipe 79.
- the reformed gas undergoes gas-liquid separation. Specifically, the liquid component 42 mixed in the reformed gas introduced into the gas-liquid separator 4 is separated from the reformed gas. As a result, the liquid component 42 can be prevented from being introduced into the adsorption tower of the PSA separation device 5 located downstream of the gas-liquid separator 4, and the adsorbent filled with the liquid component 42 in the adsorption tower Degradation of the adsorbent due to contact can be suppressed.
- the liquid component 42 recovered by the gas-liquid separation is discharged out of the gas-liquid separator 4 as drain water from the drain water discharge port 41, and is supplied to the drain water treatment device 6 through the pipe 92 and the fluid control valve 92a.
- the The pressure required to supply the drain water is provided by the pressure of the reformed gas itself.
- the reformed gas that has passed through the gas-liquid separator 4 is supplied to the PSA separator 5 via the pipe 80.
- the reformed gas is subjected to a pressure fluctuation adsorption gas separation step.
- a PSA separation method in which a cycle including an adsorption process, a desorption process, and a regeneration process is repeated is executed.
- a reformed gas containing hydrogen is introduced into an adsorption tower in which the inside of the tower is at a predetermined high pressure.
- unnecessary components carbon monoxide, carbon dioxide, nitrogen, etc.
- hydrogen-enriched gas gas with high hydrogen concentration
- This hydrogen-enriched gas is taken out of the hydrogen production system XI via the pipe 81.
- unnecessary components are desorbed from the adsorbent by reducing the pressure in the adsorption tower, and off-gas containing hydrogen remaining in the adsorption tower and the unnecessary components is discharged outside the adsorption tower.
- This off-gas is supplied as vaporizing fuel to the vaporizer 1 via the pipe 82 connected to the adsorption tower.
- the cleaning gas is passed through the adsorption tower, so that the adsorption performance of the adsorbent to the unnecessary components is recovered.
- hydrogen-enriched gas product gas
- off-gas is taken out as described above.
- the hydrogen-enriched gas is stored in a predetermined tank or a power continuously used for a predetermined application.
- the off gas supplied to the vaporizer 1 as a vaporizing fuel is introduced into the catalytic combustion unit 13 through the inner pipe 122 and the outer pipe 121.
- air is continuously supplied to the catalytic combustion section 13 through the pipe 71 and the outer pipe 121 by the operation of the blower 72.
- hydrogen in the off-gas is catalytically burned by the action of the combustion catalyst, and high-temperature (for example, 500 to 600 ° C.) combustion gas is generated.
- the high-temperature combustion gas generated in the catalytic combustion section 13 is released from the open end (lower end in the figure) of the outer pipe 121 of the supply pipe 12 and passes around the circulation pipe 14 in the main body container 11 to exhaust the combustion gas.
- the relatively high-temperature combustion gas discharged from the combustion gas discharge port 111 of the vaporizer 1 is introduced into the main body container 61 of the drain water treatment device 6 through the pipe 91 and the combustion gas introduction port 611.
- the combustion gas introduced into the main body container 61 is sent to the upper part of the main body container 61 through the periphery of the evaporation tower 63 (the bottom surface or the periphery of the side surface) located above the combustion gas inlet 611.
- the drain water treatment device 6 the drain water from which the gas-liquid separator 4 has been discharged is introduced into the jacket portion 62 through the drain water introduction port 621.
- the drain water is subjected to an evaporation process and a decomposition process.
- the drain water introduced into the jacket part 62 is introduced into the evaporation tower 63 through the communication pipe 631.
- thermal energy is also transmitted to the evaporation tower 63 as a heat source, and the drain water in the evaporation tower 63 is heated and evaporated.
- Drain water contains water and methanol, which evaporate into evaporated gas (water vapor and methanol vapor).
- the evaporative gas is also released from the upper end force of the evaporating tower 63 and is mixed with the combustion gas in the main body container 61 and then passes through the catalyst decomposition unit 64.
- methanol vapor in the evaporating gas is decomposed by the action of the oxidation catalyst, and finally harmless carbon dioxide and water are generated.
- the gas that has passed through the catalyst decomposition unit 64 is released into the atmosphere outside the drain water treatment device 6.
- the raw materials are heat exchanger 3, vaporizer reforming reactor 2, heat exchanger 3, gas-liquid separator 4,
- the hydrogen-enriched gas is taken out from the PSA separator 5 by passing through the PSA separator 5 and the off-gas discharged from the PSA separator 5 is supplied to the vaporizer 1.
- combustion gas is generated by catalytic combustion of off-gas, and the combustion gas is supplied to the drain water treatment device 6 through heat exchange with the mixed raw material.
- the drain water treatment device 6 the drain water discharged from the gas-liquid separator 4 is heated and evaporated by the combustion gas, and the evaporated gas is released into the atmosphere after decomposing the methanol, which is a harmful component contained therein.
- the above-described operation of the hydrogen production system XI is for a steady operation in which off-gas is sufficiently supplied from the PSA separator 5 to the catalytic combustion unit 13 of the vaporizer 1.
- the off-gas is not sufficiently supplied from the PSA separator 5 to the catalytic combustion unit 13.
- the automatic valve 73a is kept open so that the fuel for vaporization (for example, LPG) required in the catalytic combustion section 13 assists the carburetor 1 or its catalytic combustion section 13. Supplied.
- the hydrogen production system XI described above by adjusting the supply amount of off-gas (supply amount per unit time) discharged from the PSA separation device 5 and supplied to the vaporizer 1 during its steady operation, The fuel necessary for heating the mixed raw material in the vaporizer 1 to the vaporized state at the desired temperature can be supplied only by the off-gas from the PSA separator 5.
- the reforming reaction is controlled by adjusting the ratio of the water vapor reforming reaction and the partial oxidation reforming reaction of the hydrocarbon raw material that proceeds in the reforming reaction section 22 of the reforming reactor 2. The inside of the vessel is maintained at the desired reaction temperature.
- the mixed raw material is continuously heated and vaporized only by the self-supplied heat accompanying the system operation, and the reforming reaction section 22 of the reforming reactor 2 is maintained at the desired temperature. Has been.
- the treatment of drain water in the hydrogen production system XI involves heating and evaporating the drain water generated by the operation of the system XI with the combustion gas after heating the mixed raw material in the vaporizer 1. This is done. That is, the heat source for evaporating the drain water is provided only by the combustion gas after heating the mixed raw material. Therefore, the treatment of drain water in the hydrogen production system XI is automatically performed using only the self-supplied heat associated with the operation of the system XI. Compared to the case of waste disposal, it is possible to reduce treatment costs and improve treatment efficiency.
- the hydrogen production system XI may be modified so that drain water discharged from equipment other than the hydrogen production system X 1 is additionally introduced into the drain water treatment device 6 of the system XI for treatment. That is, when the drain water generated by the operation of the combustion gas power hydrogen production system XI used as a heat source for heating the drain water in the drain water treatment device 6 has excess thermal energy.
- the drain water introduced from other facilities can be additionally evaporated by the drain water treatment device 6, and the deformation of the powerful system has the viewpoint of effectively utilizing the excess thermal energy of the combustion gas. Is preferred.
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Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/300,366 US8048177B2 (en) | 2006-05-11 | 2007-05-07 | Method for treatment of drain in hydrogen production and hydrogen production system |
KR1020087029262A KR101310174B1 (ko) | 2006-05-11 | 2007-05-07 | 수소 제조에 있어서의 배수의 처리방법 및 수소 제조 시스템 |
JP2008515496A JP5199076B2 (ja) | 2006-05-11 | 2007-05-07 | 水素製造におけるドレン水の処理方法および水素製造システム |
CA2651797A CA2651797C (en) | 2006-05-11 | 2007-05-07 | Method for treatment of drain in hydrogen production and hydrogen production system |
EP07742900A EP2025642B1 (en) | 2006-05-11 | 2007-05-07 | Method for treatment of drain in hydrogen production and hydrogen production system |
AU2007250925A AU2007250925B2 (en) | 2006-05-11 | 2007-05-07 | Method for treatment of drain in hydrogen production and hydrogen production system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006-132719 | 2006-05-11 | ||
JP2006132719 | 2006-05-11 |
Publications (1)
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WO2007132693A1 true WO2007132693A1 (ja) | 2007-11-22 |
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PCT/JP2007/059465 WO2007132693A1 (ja) | 2006-05-11 | 2007-05-07 | 水素製造におけるドレン水の処理方法および水素製造システム |
Country Status (8)
Country | Link |
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US (1) | US8048177B2 (ja) |
EP (1) | EP2025642B1 (ja) |
JP (1) | JP5199076B2 (ja) |
KR (1) | KR101310174B1 (ja) |
AU (1) | AU2007250925B2 (ja) |
CA (1) | CA2651797C (ja) |
TW (1) | TWI419733B (ja) |
WO (1) | WO2007132693A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010189217A (ja) * | 2009-02-17 | 2010-09-02 | Keio Gijuku | 改質器および改質方法 |
JP2016037402A (ja) * | 2014-08-05 | 2016-03-22 | 東京瓦斯株式会社 | 水素製造装置、水素製造システムおよび水素製造方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102616741B (zh) * | 2012-03-29 | 2014-07-09 | 洁星环保科技投资(上海)有限公司 | 一种氢气制备方法及设备 |
CN109455667B (zh) * | 2018-11-09 | 2023-10-03 | 沈阳航空航天大学 | 一种采用丝网分离机构的机载甲醇在线重整系统及控制方法 |
CN110980641B (zh) * | 2019-12-06 | 2023-02-28 | 大连海事大学 | 一种气液两相高效制氢的装置及方法 |
CN113386936A (zh) * | 2021-04-09 | 2021-09-14 | 张纵 | 模块化氢能船舶电传动力系统及方法 |
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JPH05347159A (ja) * | 1992-06-12 | 1993-12-27 | Tokyo Electric Power Co Inc:The | 燃料電池発電プラントにおける水系処理システム |
JP2002198073A (ja) * | 2000-12-22 | 2002-07-12 | Honda Motor Co Ltd | 加熱処理システムの制御方法 |
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IT1091238B (it) * | 1977-09-27 | 1985-07-06 | Fiat Spa | Ricuperatore di calore da gas esausti ad alta temperatura per irraggiamento e convenzione |
ES2046478T3 (es) * | 1988-08-08 | 1994-02-01 | Chemical Waste Management, Inc. | Procedimiento para el tratamiento catalitico de aguas residuales. |
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2007
- 2007-05-07 CA CA2651797A patent/CA2651797C/en not_active Expired - Fee Related
- 2007-05-07 US US12/300,366 patent/US8048177B2/en not_active Expired - Fee Related
- 2007-05-07 JP JP2008515496A patent/JP5199076B2/ja active Active
- 2007-05-07 WO PCT/JP2007/059465 patent/WO2007132693A1/ja active Application Filing
- 2007-05-07 EP EP07742900A patent/EP2025642B1/en not_active Expired - Fee Related
- 2007-05-07 AU AU2007250925A patent/AU2007250925B2/en not_active Ceased
- 2007-05-07 KR KR1020087029262A patent/KR101310174B1/ko active IP Right Grant
- 2007-05-09 TW TW096116474A patent/TWI419733B/zh active
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JPH05347159A (ja) * | 1992-06-12 | 1993-12-27 | Tokyo Electric Power Co Inc:The | 燃料電池発電プラントにおける水系処理システム |
JP2002198073A (ja) * | 2000-12-22 | 2002-07-12 | Honda Motor Co Ltd | 加熱処理システムの制御方法 |
JP2002246050A (ja) * | 2001-02-16 | 2002-08-30 | Matsushita Electric Works Ltd | 燃料電池発電機 |
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JP2010189217A (ja) * | 2009-02-17 | 2010-09-02 | Keio Gijuku | 改質器および改質方法 |
JP2016037402A (ja) * | 2014-08-05 | 2016-03-22 | 東京瓦斯株式会社 | 水素製造装置、水素製造システムおよび水素製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CA2651797A1 (en) | 2007-11-22 |
CA2651797C (en) | 2014-04-01 |
EP2025642A1 (en) | 2009-02-18 |
AU2007250925A1 (en) | 2007-11-22 |
TW200744735A (en) | 2007-12-16 |
AU2007250925B2 (en) | 2011-08-11 |
EP2025642B1 (en) | 2012-09-19 |
KR20090009279A (ko) | 2009-01-22 |
TWI419733B (zh) | 2013-12-21 |
JP5199076B2 (ja) | 2013-05-15 |
US8048177B2 (en) | 2011-11-01 |
US20090148381A1 (en) | 2009-06-11 |
EP2025642A4 (en) | 2011-03-30 |
JPWO2007132693A1 (ja) | 2009-09-24 |
KR101310174B1 (ko) | 2013-09-23 |
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