Methanol steam reforming hydrogen production system coupled with low-temperature nuclear reactor

Abstract

The utility model provides a methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor. The system comprises a low-temperature nuclear reactor device and a methanol steam reforming hydrogen production device. Wherein the low-temperature nuclear reactor device comprises a coolant outlet; the methanol steam reforming hydrogen production device comprises a reforming hydrogen production unit and a tail gas waste heat recovery unit, the reforming hydrogen production unit comprises a raw material inlet end and a tail gas outlet end, the raw material inlet end of the reforming hydrogen production unit is communicated with the coolant outlet, and the tail gas outlet end of the reforming hydrogen production unit is communicated with the tail gas waste heat recovery unit; and the tail gas waste heat recovery unit is used for carrying out combustion treatment on the tail gas generated by the reforming hydrogen production unit to generate hot flue gas and supplying heat of the hot flue gas to the reforming hydrogen production unit. And the energy consumption required by system operation can be reduced.

Description

Technical Field

[0001] This application relates to the field of hydrogen production technology, specifically to a methanol steam reforming hydrogen production system coupled to a cryogenic nuclear reactor. Background Technology

[0002] Current nuclear hydrogen production technologies typically combine high-temperature nuclear reactors (where the coolant outlet steam temperature is usually between 750°C and 950°C) with high-temperature hydrogen production technology (requiring a heat supply of temperatures above 700°C). Low-temperature nuclear reactors (such as light water reactors) typically have a secondary coolant outlet steam temperature of 250°C to 320°C, and are therefore usually used for power generation, with poorer overall utilization capacity and economic efficiency. Utility Model Content

[0003] This application addresses the shortcomings of related technologies by proposing a methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor, in order to solve the problem of poor comprehensive utilization capability of low-temperature nuclear reactors in related technologies.

[0004] This application provides a methanol steam reforming hydrogen production system coupled to a cryogenic nuclear reactor, comprising:

[0005] Low-temperature nuclear reactor apparatus, including coolant outlet;

[0006] A methanol steam reforming hydrogen production unit includes a reforming hydrogen production unit and a tail gas waste heat recovery unit. The reforming hydrogen production unit includes a feed inlet and a tail gas outlet. The feed inlet of the reforming hydrogen production unit is connected to the coolant outlet, and the tail gas outlet of the reforming hydrogen production unit is connected to the tail gas waste heat recovery unit. The tail gas waste heat recovery unit is used to combust the tail gas generated by the reforming hydrogen production unit to generate hot flue gas, and supply the heat of the hot flue gas to the reforming hydrogen production unit.

[0007] In some embodiments, the exhaust gas waste heat recovery unit includes:

[0008] The combustion chamber has a fuel inlet and a hot flue gas outlet. The fuel inlet is connected to the tail gas outlet of the reforming hydrogen production unit, and the hot flue gas outlet is used to discharge hot flue gas.

[0009] The heat exchange pipeline has a flue gas inlet end and a flue gas outlet end. The flue gas inlet end is connected to the hot flue gas outlet end of the combustion chamber. The hot flue gas exchanges heat with the reforming hydrogen production unit through the heat exchange pipeline.

[0010] In some embodiments, the exhaust gas waste heat recovery unit further includes:

[0011] A gas purification device is connected to the flue gas outlet end and is used to purify the gas discharged from the flue gas outlet end and discharge the purified gas.

[0012] And / or, a first premixer, the system further comprising a methanol storage tank for storing methanol; the inlet of the first premixer is connected to the tail gas outlet of the reforming hydrogen production unit, external air and the methanol storage tank, and the outlet is connected to the fuel inlet; the first premixer is used to receive the tail gas discharged from the tail gas outlet, the methanol in the methanol storage tank and the external air, mix the methanol, air and the tail gas and supply them to the combustion chamber.

[0013] In some embodiments, the reforming hydrogen production unit includes a main reaction device, which includes a feed inlet end for receiving methanol and water vapor discharged from the coolant outlet. The main reaction device is used to mix, heat, and vaporize methanol and water vapor to generate a reforming mixture. Hot flue gas in the heat exchange pipeline flows through the main reaction device and exchanges heat with it.

[0014] In some embodiments, the main reaction apparatus includes a gasification heating unit and a reforming reactor; the gasification heating unit includes a feed inlet for receiving methanol and water vapor discharged from the coolant outlet, and is used to mix and heat the methanol and water vapor to form a mixed gas of methanol and water vapor; the reforming reactor is used to receive the mixed gas of methanol and water vapor, and the mixed gas of methanol and water vapor reacts in the reforming reactor to generate a reformed mixture; wherein...

[0015] The hot flue gas flow in the heat exchange pipeline passes through the gasification heating unit and exchanges heat with the gasification heating unit.

[0016] And / or, the hot flue gas in the heat exchange pipeline passes through the reforming reactor and exchanges heat with the reforming reactor.

[0017] In some embodiments, the gasification heating unit includes a second premixer and a gasifier; the second premixer includes a raw material inlet for receiving methanol and water vapor discharged from the coolant outlet, and is used to mix methanol and water vapor to form a methanol-water vapor mixture; the gasifier is used to heat and gasify the methanol-water vapor mixture to form a methanol-water vapor mixture gas; wherein...

[0018] When the hot flue gas in the heat exchange pipeline passes through the gasification heating unit and exchanges heat with the gasification heating unit, the hot flue gas in the heat exchange pipeline passes through the gasifier and exchanges heat with the gasifier.

[0019] In some embodiments, the reforming hydrogen production unit further includes a separation and purification device connected to the main reaction device. The separation and purification device is used to receive the reforming mixture discharged from the main reaction device and separate the hydrogen and tail gas in the reforming mixture, and then supply the tail gas to the combustion chamber.

[0020] In some embodiments, the separation and purification equipment is a pressure swing adsorption (PSA) device or a membrane separation device.

[0021] In some embodiments, the reforming hydrogen production unit further includes a gas-liquid separation device connected between the main reaction unit and the separation and purification device; the gas-liquid separation device is used to receive the reforming mixture discharged from the main reaction unit and separate the reforming mixture into reformed mixed gas and residual liquid, the residual liquid being supplied to the main reaction unit; the separation and purification device receives the reformed mixed gas and separates the reformed mixed gas into hydrogen and tail gas, and then supplies the tail gas to the combustion chamber.

[0022] In some embodiments, the reforming hydrogen production unit further includes a tail gas treatment device, which is used to receive the tail gas discharged from the separation and purification device and adsorb and purify the tail gas to remove carbon dioxide, and then supply the tail gas to the tail gas waste heat recovery unit.

[0023] The beneficial effects of this application include:

[0024] In this embodiment, since the temperature of the steam generated at the coolant outlet of the cryogenic nuclear reactor is compatible with the temperature of the raw material steam required for the methanol steam reforming hydrogen production unit, the steam generated at the coolant outlet of the cryogenic nuclear reactor is used as the raw material for the methanol steam reforming hydrogen production unit to produce hydrogen. Compared to using it only for power generation, this improves the resource utilization and energy utilization rate of the steam products from the cryogenic nuclear reactor. Furthermore, the waste heat recovery unit in the methanol steam reforming hydrogen production unit in this embodiment can recover and reuse the waste heat generated by the reforming hydrogen production unit, further improving the utilization rate of waste heat and reducing the energy consumption required for system operation.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] Figures 1-15The diagram shown is a schematic representation of a methanol steam reforming hydrogen production system coupled to a cryogenic nuclear reactor, provided in an exemplary embodiment of this application. Detailed Implementation

[0028] The methanol-steam reforming hydrogen production system coupled to a cryogenic nuclear reactor in the embodiments of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments may complement or combine with each other.

[0029] This application provides a methanol steam reforming hydrogen production system coupled to a cryogenic nuclear reactor, such as... Figure 1 As shown, the system includes a cryogenic nuclear reactor and a methanol-steam reforming hydrogen production unit. The cryogenic nuclear reactor includes a coolant outlet. The methanol-steam reforming hydrogen production unit includes a reforming hydrogen production unit and a tail gas waste heat recovery unit. The reforming hydrogen production unit includes a feedstock inlet and a tail gas outlet. The feedstock inlet of the reforming hydrogen production unit is connected to the coolant outlet, and the tail gas outlet of the reforming hydrogen production unit is connected to the tail gas waste heat recovery unit. The tail gas waste heat recovery unit is used to combust the tail gas generated by the reforming hydrogen production unit to generate hot flue gas, and then supplies the heat from the hot flue gas to the reforming hydrogen production unit.

[0030] In this embodiment, since the temperature of the steam generated at the coolant outlet of the cryogenic nuclear reactor is compatible with the temperature of the raw material steam required for the methanol steam reforming hydrogen production unit, the steam generated at the coolant outlet of the cryogenic nuclear reactor is used as the raw material for the methanol steam reforming hydrogen production unit to produce hydrogen. Compared to using it only for power generation, this improves the resource utilization and energy utilization rate of the steam products from the cryogenic nuclear reactor. Furthermore, the waste heat recovery unit in the methanol steam reforming hydrogen production unit in this embodiment can recover and reuse the waste heat generated by the reforming hydrogen production unit, further improving the utilization rate of waste heat and reducing the energy consumption required for system operation.

[0031] In some embodiments, the temperature of the steam generated at the coolant outlet of the cryogenic nuclear reactor is less than or equal to 350°C. The temperature of the steam generated at the coolant outlet of the cryogenic nuclear reactor is adapted to the temperature of the feedstock steam required by the methanol steam reforming hydrogen production unit, and the steam generated at the coolant outlet of the cryogenic nuclear reactor can be directly supplied to the methanol steam reforming hydrogen production unit.

[0032] In some embodiments, a cryogenic nuclear reactor apparatus includes a light water nuclear reactor. Further, a light water nuclear reactor may include a pressurized water reactor.

[0033] In some embodiments, when the cryogenic nuclear reactor is a pressurized water reactor, the coolant outlet can be the secondary coolant outlet of the pressurized water reactor.

[0034] In some embodiments, the water vapor temperature at the secondary coolant outlet of the pressurized water reactor ranges from 250°C to 320°C.

[0035] In some embodiments, the cryogenic nuclear reactor apparatus includes a reactor core, a steam generator, and a steam turbine connected in sequence. The steam generated by the steam generator can be directly supplied to the reforming hydrogen production unit or supplied to the reforming hydrogen production unit via the steam turbine.

[0036] In some embodiments, the cryogenic nuclear reactor apparatus also includes a power supply device (not shown) that can be used to provide power to the methanol steam reforming hydrogen production unit.

[0037] In some embodiments, the exhaust gas produced by the reforming hydrogen production unit may include carbon monoxide (CO) and methanol (CH3OH).

[0038] In some embodiments, the hot flue gas generated by the exhaust gas waste heat recovery unit may include carbon dioxide (CO2) and water vapor (H2O).

[0039] In some embodiments, such as Figure 1 As shown, the system also includes a methanol storage tank for storing methanol, which is connected to the feed inlet of the reforming hydrogen production unit to supply methanol.

[0040] In some embodiments, the system also includes a gas cylinder group (not shown) for providing an inert gas, such as nitrogen (N2), to the methanol reforming hydrogen production unit. The gas cylinder group provides an inert gas environment to the unit and can purge the system with inert gas before restarting the equipment after startup or maintenance to remove air, especially oxygen, from the system, thereby ensuring the safety and stability of the system.

[0041] In some embodiments, the system further includes a pressure reducing device (not shown) connected between the cryogenic nuclear reactor and the methanol steam reforming hydrogen production unit, for reducing the pressure of the steam discharged from the coolant outlet of the cryogenic nuclear reactor to match the pressure of the steam required by the methanol steam reforming hydrogen production unit.

[0042] In some embodiments, such as Figure 2 As shown, the exhaust gas waste heat recovery unit includes a combustion chamber and a heat exchange pipeline. The combustion chamber has a fuel inlet and a hot flue gas outlet. The fuel inlet is connected to the exhaust gas outlet of the reforming hydrogen production unit, and the hot flue gas outlet is used to discharge the hot flue gas. The heat exchange pipeline has a flue gas inlet and a flue gas outlet. The flue gas inlet is connected to the hot flue gas outlet of the combustion chamber, and the hot flue gas exchanges heat with the reforming hydrogen production unit through the heat exchange pipeline.

[0043] In this embodiment, the heat from the flue gas generated during reforming hydrogen production is reused through the combustion chamber and heat exchange pipeline to supply heat to the reforming hydrogen production unit, thereby improving energy utilization.

[0044] In some embodiments, hot flue gas can flow through a heat exchange pipeline through the reforming hydrogen production unit to provide heat to the reforming hydrogen production unit.

[0045] In some embodiments, such as Figure 3 As shown, the exhaust gas waste heat recovery unit also includes a gas purification device. The gas purification device is connected to the flue gas outlet and is used to purify the gas discharged from the flue gas outlet and then discharge the purified gas.

[0046] In this embodiment, a gas purification device is added to the exhaust gas waste heat recovery unit to purify the flue gas and avoid direct emission of flue gas that could pollute the atmospheric environment.

[0047] In some embodiments, such as Figure 4 As shown, the exhaust gas waste heat recovery unit also includes a first premixer, and the system also includes a methanol storage tank for storing methanol; the inlet end of the first premixer is connected to the exhaust gas outlet end of the reforming hydrogen production unit, external air and the methanol storage tank, and the outlet end is connected to the fuel inlet end; the first premixer is used to receive the exhaust gas discharged from the exhaust gas outlet end, the methanol in the methanol storage tank and the external air, mix the methanol, air and exhaust gas and supply them to the combustion chamber.

[0048] In this embodiment, the methanol storage tank is connected to the first premixer to increase the methanol content in the exhaust gas and air is introduced so that the mixture of exhaust gas, methanol and air can be fully combusted in the combustion chamber, thereby making full use of the exhaust gas and improving the exhaust gas recovery and utilization rate.

[0049] In some embodiments, such as Figure 5 As shown, the exhaust gas waste heat recovery unit also includes a gas purification device and a first premixer. The gas purification device is connected to the flue gas outlet and is used to purify the gas discharged from the flue gas outlet and discharge the purified gas. The system also includes a methanol storage tank for storing methanol; the inlet of the first premixer is connected to the exhaust gas outlet of the reforming hydrogen production unit, external air, and the methanol storage tank, and the outlet is connected to the fuel inlet; the first premixer is used to receive the exhaust gas discharged from the exhaust gas outlet, the methanol in the methanol storage tank, and the external air, mix the methanol, air, and exhaust gas, and supply them to the combustion chamber.

[0050] In some embodiments, such as Figure 6As shown, the reforming hydrogen production unit includes a main reaction device, which includes a feed inlet end for receiving methanol and water vapor discharged from the coolant outlet. The main reaction device is used to mix, heat, and vaporize methanol and water vapor to generate a reforming mixture. Hot flue gas flows through the heat exchange pipeline and exchanges heat with the main reaction device.

[0051] In this embodiment, methanol and water vapor can be reacted using the main reaction equipment. The resulting reformed mixture includes hydrogen (H2), carbon dioxide (CO2), a small amount of carbon monoxide (CO), unreacted methanol (CH3OH), and water. Further, the reformed mixture can be separated and purified to obtain the desired product, namely hydrogen (H2).

[0052] In some embodiments, such as Figure 7 As shown, the main reaction equipment includes a gasification heating unit and a reforming reactor. The gasification heating unit includes a raw material inlet end, which is used to receive methanol and water vapor discharged from the coolant outlet. The gasification heating unit is used to mix methanol and water vapor and heat and gasify them to form a mixture of methanol and water vapor. The reforming reactor is used to receive the mixture of methanol and water vapor. The mixture of methanol and water vapor reacts in the reforming reactor to generate a reformed mixture. The hot flue gas in the heat exchange pipeline flows through the gasification heating unit and exchanges heat with the gasification heating unit.

[0053] In this embodiment, by providing the heat of the hot flue gas to the gasification heating unit, the energy required by the gasification heating unit can be saved, the energy utilization rate can be improved, and the equipment cost can be reduced.

[0054] In some embodiments, such as Figure 8 As shown, the main reaction equipment includes a gasification heating unit and a reforming reactor. The gasification heating unit includes a raw material inlet end, which is used to receive methanol and water vapor discharged from the coolant outlet. The gasification heating unit is used to mix methanol and water vapor and heat and gasify them to form a mixture of methanol and water vapor. The reforming reactor is used to receive the mixture of methanol and water vapor. The mixture of methanol and water vapor reacts in the reforming reactor to generate a reformed mixture. The hot flue gas in the heat exchange pipeline flows through the reforming reactor and exchanges heat with the reforming reactor.

[0055] In this embodiment, the heat from the hot flue gas can be directly supplied to the reforming reactor to provide the heat energy required for the reaction of methanol and water vapor.

[0056] In some embodiments, such as Figure 9As shown, the main reaction equipment includes a gasification heating unit and a reforming reactor. The gasification heating unit includes a raw material inlet end, which is used to receive methanol and water vapor discharged from the coolant outlet. The gasification heating unit is used to mix methanol and water vapor and heat and gasify them to form a mixture of methanol and water vapor. The reforming reactor is used to receive the mixture of methanol and water vapor. The mixture of methanol and water vapor reacts in the reforming reactor to generate a reformed mixture. The hot flue gas in the heat exchange pipeline flows through the gasification heating unit and exchanges heat with it. The hot flue gas in the heat exchange pipeline also flows through the reforming reactor and exchanges heat with it.

[0057] In this embodiment, the heat exchange pipeline can flow sequentially through the reforming reactor and the gasification heating unit to fully utilize the heat of the hot flue gas, avoid incomplete heat utilization, and further improve energy utilization efficiency.

[0058] In some embodiments, such as Figure 10 As shown, the main reaction equipment includes a gasification heating unit and a reforming reactor. The gasification heating unit includes a raw material inlet end, which is used to receive methanol and water vapor discharged from the coolant outlet. The gasification heating unit is used to mix methanol and water vapor and heat and gasify them to form a mixture of methanol and water vapor. The reforming reactor is used to receive the mixture of methanol and water vapor. The mixture of methanol and water vapor reacts in the reforming reactor to generate a reformed mixture. The heat exchange pipeline includes a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline has a first flue gas inlet end and a first flue gas outlet end. The second heat exchange pipeline has a second flue gas inlet end and a second flue gas outlet end. Both the first flue gas inlet end and the second flue gas inlet end are connected to the hot flue gas outlet end of the combustion chamber. The hot flue gas in the first heat exchange pipeline flows through the gasification heating unit and exchanges heat with the gasification heating unit. The hot flue gas in the second heat exchange pipeline flows through the reforming reactor and exchanges heat with the reforming reactor.

[0059] In this embodiment, two heat exchange pipelines can be set up to divert hot flue gas to the two heat exchange pipelines, so that it can be supplied to the reforming reactor and the gasification heating unit simultaneously to accelerate the heat exchange efficiency. This can accelerate the gasification heating rate and the reforming reaction rate, and further improve production efficiency.

[0060] In some embodiments, such as Figure 11As shown, the gasification heating unit includes a second premixer and a gasifier; the second premixer includes a raw material inlet end, which is used to receive methanol and water vapor discharged from the coolant outlet, and the second premixer is used to mix methanol and water vapor to form a mixture of methanol and water vapor; the gasifier is used to heat and gasify the mixture of methanol and water vapor to form a mixed gas of methanol and water vapor; wherein, when the hot flue gas in the heat exchange pipeline flows through the gasification heating unit and exchanges heat with the gasification heating unit, the hot flue gas in the heat exchange pipeline flows through the gasifier and exchanges heat with the gasifier.

[0061] In this embodiment, a second premixer is provided to mix water vapor and methanol evenly, and the heat exchange pipeline can directly act on the vaporizer for heating and vaporizing methanol and water vapor.

[0062] In some embodiments, such as Figure 12 As shown, the reforming hydrogen production unit also includes a separation and purification device, which is connected to the main reaction device. The separation and purification device is used to receive the reforming mixture discharged from the main reaction device and separate the hydrogen and tail gas in the reforming mixture, and then supply the tail gas to the combustion chamber.

[0063] This embodiment separates and purifies the reformed mixture, which can further improve the purity of hydrogen.

[0064] In some embodiments, the separation and purification equipment is a pressure swing adsorption (PSA) system or a membrane separation system. It can be used for the separation and purification of hydrogen.

[0065] In some embodiments, such as Figure 13 As shown, the reforming hydrogen production unit also includes a gas-liquid separation device, which is connected between the main reaction unit and the separation and purification unit. The gas-liquid separation device is used to receive the reforming mixture discharged from the main reaction unit and separate the reforming mixture into reformed mixed gas and residual liquid, and the residual liquid is supplied to the main reaction unit. The separation and purification unit receives the reformed mixed gas and separates the reformed mixed gas into hydrogen and tail gas, and then supplies the tail gas to the combustion chamber.

[0066] This embodiment, by setting up a gas-liquid separation device, can further separate the residual liquid in the product obtained after the reaction in the main reaction device and reuse it in the main reaction device, thereby improving the effective utilization rate of resources.

[0067] In some embodiments, the main reaction apparatus includes a vaporizer, and the residual liquid is supplied to the vaporizer of the main reaction apparatus for secondary use.

[0068] In some embodiments, the reformed gas mixture comprises hydrogen, carbon dioxide, a small amount of carbon monoxide and methanol, the residual liquid comprises water, and the tail gas comprises carbon monoxide, methanol and carbon dioxide.

[0069] In some embodiments, such as Figure 14As shown, the reforming hydrogen production unit also includes a tail gas treatment device, which is used to receive the tail gas discharged from the separation and purification equipment and to adsorb and purify the tail gas to remove carbon dioxide, and then supply the tail gas to the tail gas waste heat recovery unit.

[0070] In this embodiment, the exhaust gas obtained after being processed by the separation and purification equipment is subjected to secondary treatment to remove carbon dioxide. The components in the treated exhaust gas include carbon monoxide and methanol, which can be directly provided to the exhaust gas waste heat recovery unit for secondary combustion to generate heat for reuse. This can improve the overall capacity utilization of the system and save the thermal energy required by the system.

[0071] Furthermore, for ease of understanding, this application also provides a preferred embodiment, such as... Figure 15 As shown,

[0072] In this embodiment, the system includes a cryogenic nuclear reactor, a methanol steam reforming hydrogen production unit, and a methanol storage tank. The coolant outlet of the cryogenic nuclear reactor and the methanol storage tank are connected to the feed inlet of the methanol steam reforming hydrogen production unit. The methanol steam reforming hydrogen production unit includes a reforming hydrogen production unit and a tail gas waste heat recovery unit, with the tail gas outlet of the reforming hydrogen production unit connected to the tail gas waste heat recovery unit. The reforming hydrogen production unit includes a main reaction device, a gas-liquid separation device, a separation and purification device, and a tail gas treatment device connected in sequence, with the outlet of the tail gas treatment device connected to the tail gas waste heat recovery unit. The main reaction device includes a gasification heating unit and a reforming reactor connected to each other. The gasification heating unit includes a second premixer and a gasifier connected in sequence, with the feed inlet of the second premixer connected to the coolant outlet of the cryogenic nuclear reactor, and the gasifier connected to the reforming reactor. The tail gas waste heat recovery unit includes a first premixer, a combustion chamber, a first heat exchange pipeline / second heat exchange pipeline, and a gas purification device connected in sequence. The inlet of the first premixer is connected to the tail gas outlet of the reforming hydrogen production unit. The hot flue gas provides heat to the reforming reactor through the first heat exchange pipeline and to the gasifier through the second heat exchange pipeline. The hot flue gas after heat exchange in the first heat exchange pipeline / second heat exchange pipeline is then introduced into the gas purification equipment.

[0073] The preparation process of the system in this embodiment includes the following steps: The methanol-water vapor reforming hydrogen production unit is purged with nitrogen to remove air. Water vapor generated from the coolant outlet of the cryogenic nuclear reactor is introduced into a second premixer, and methanol from the methanol storage tank is simultaneously introduced into the second premixer. The methanol and water vapor are mixed in the second premixer and then introduced into a vaporizer for heating and vaporization. This vaporized mixture is then introduced into the reforming reactor to react and obtain a reformed mixture. The reformed mixture consists of hydrogen (H2), carbon dioxide (CO2), a small amount of carbon monoxide (CO), unreacted methanol (CH3OH), and water. The reformed mixture is then introduced into a gas-liquid separator for gas-liquid separation to obtain a reformed mixed gas and a residual liquid. The reformed mixed gas consists of hydrogen (H2), carbon dioxide (CO2), a small amount of carbon monoxide (CO), and unreacted methanol (CH3OH). The residual liquid consists of water. The residual liquid is then fed back into the vaporizer for reuse. The reformed gas mixture is passed into a separation and purification unit to separate and purify hydrogen, while simultaneously removing carbon dioxide through adsorption, resulting in a tail gas containing carbon dioxide (CO2), carbon monoxide (CO), and methanol (CH3OH). This tail gas is further processed in a tail gas treatment unit to remove carbon dioxide, yielding purified tail gas containing carbon monoxide (CO) and methanol (CH3OH). This purified tail gas is then passed into a first premixer, where methanol from a methanol storage tank and air are simultaneously mixed. The mixture is then introduced into a combustion chamber for combustion, generating hot flue gas. The main components of this hot flue gas are carbon dioxide and water vapor. The heat from the hot flue gas is supplied to the reforming reactor via a first heat exchange pipeline, and to the gasifier via a second heat exchange pipeline. After passing through both heat exchange pipelines, the hot flue gas is then passed into a gas purification unit to remove carbon dioxide. The purified flue gas is then released into the atmosphere, containing primarily water, nitrogen, and air.

[0074] In this embodiment, the steam in the feedstock of the methanol steam reforming hydrogen production unit is provided by the coolant outlet of the cryogenic nuclear reactor, thus improving the energy utilization rate of the products of the cryogenic nuclear reactor. Furthermore, since the tail gas waste heat recovery unit in this application can recycle and reuse the tail gas to heat the reforming hydrogen production unit, the secondary energy utilization rate of resources can be improved. Moreover, this application uses gas-liquid separation equipment and separation and purification equipment to purify the hydrogen, further improving the purity of the hydrogen.

[0075] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

Claims

1. A methanol steam reforming hydrogen production system coupled to a low-temperature nuclear reactor, characterized in that, include: Low-temperature nuclear reactor apparatus, including coolant outlet; A methanol steam reforming hydrogen production unit includes a reforming hydrogen production unit and a tail gas waste heat recovery unit. The reforming hydrogen production unit includes a feed inlet and a tail gas outlet. The feed inlet of the reforming hydrogen production unit is connected to the coolant outlet, and the tail gas outlet of the reforming hydrogen production unit is connected to the tail gas waste heat recovery unit. The tail gas waste heat recovery unit is used to combust the tail gas generated by the reforming hydrogen production unit to generate hot flue gas, and supply the heat of the hot flue gas to the reforming hydrogen production unit.

2. The methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor according to claim 1, characterized in that, The exhaust gas waste heat recovery unit includes: The combustion chamber has a fuel inlet and a hot flue gas outlet. The fuel inlet is connected to the tail gas outlet of the reforming hydrogen production unit, and the hot flue gas outlet is used to discharge hot flue gas. The heat exchange pipeline has a flue gas inlet end and a flue gas outlet end. The flue gas inlet end is connected to the hot flue gas outlet end of the combustion chamber. The hot flue gas exchanges heat with the reforming hydrogen production unit through the heat exchange pipeline.

3. The methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor according to claim 2, characterized in that, The exhaust gas waste heat recovery unit also includes: A gas purification device is connected to the flue gas outlet end and is used to purify the gas discharged from the flue gas outlet end and discharge the purified gas. And / or, a first premixer, the system further comprising a methanol storage tank for storing methanol; the inlet of the first premixer is connected to the tail gas outlet of the reforming hydrogen production unit, external air and the methanol storage tank, and the outlet is connected to the fuel inlet; the first premixer is used to receive the tail gas discharged from the tail gas outlet, the methanol in the methanol storage tank and the external air, mix the methanol, air and the tail gas and supply them to the combustion chamber.

4. The methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor according to claim 2, characterized in that, The reforming hydrogen production unit includes a main reaction device, which includes a feed inlet end for receiving methanol and water vapor discharged from the coolant outlet. The main reaction device is used to mix, heat, and vaporize methanol and water vapor to generate a reforming mixture. The hot flue gas in the heat exchange pipeline flows through the main reaction device and exchanges heat with it.

5. The methanol steam reforming hydrogen production system coupled with a cryogenic nuclear reactor according to claim 4, characterized in that, The main reaction equipment includes a gasification heating unit and a reforming reactor; the gasification heating unit includes a raw material inlet for receiving methanol and water vapor discharged from the coolant outlet, and is used to mix and heat the methanol and water vapor to form a methanol-water vapor mixture; the reforming reactor receives the methanol-water vapor mixture, and the methanol-water vapor mixture reacts within the reforming reactor to generate a reformed mixture; wherein... The hot flue gas flow in the heat exchange pipeline passes through the gasification heating unit and exchanges heat with the gasification heating unit. And / or, the hot flue gas in the heat exchange pipeline passes through the reforming reactor and exchanges heat with the reforming reactor.

6. The methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor according to claim 5, characterized in that, The gasification heating unit includes a second premixer and a gasifier; the second premixer includes a raw material inlet end, which is used to receive methanol and water vapor discharged from the coolant outlet, and is used to mix methanol and water vapor to form a methanol-water vapor mixture; the gasifier is used to heat and gasify the methanol-water vapor mixture to form a methanol-water vapor mixture gas; wherein... When the hot flue gas in the heat exchange pipeline passes through the gasification heating unit and exchanges heat with the gasification heating unit, the hot flue gas in the heat exchange pipeline passes through the gasifier and exchanges heat with the gasifier.

7. The methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor according to claim 4, characterized in that, The reforming hydrogen production unit also includes a separation and purification device, which is connected to the main reaction device. The separation and purification device is used to receive the reforming mixture discharged from the main reaction device and separate the hydrogen and tail gas in the reforming mixture, and then supply the tail gas to the combustion chamber.

8. The methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor according to claim 7, characterized in that, The separation and purification equipment is a pressure swing adsorption (PSA) device or a membrane separation device.

9. The methanol steam reforming hydrogen production system coupled with a low-temperature nuclear reactor according to claim 7, characterized in that, The reforming hydrogen production unit further includes a gas-liquid separation device connected between the main reaction unit and the separation and purification unit. The gas-liquid separation device is used to receive the reforming mixture discharged from the main reaction unit and separate the reforming mixture into reformed mixed gas and residual liquid, and the residual liquid is supplied to the main reaction unit. The separation and purification unit receives the reformed mixed gas and separates the reformed mixed gas into hydrogen and tail gas, and then supplies the tail gas to the combustion chamber.

10. The methanol steam reforming hydrogen production system coupled with a cryogenic nuclear reactor according to claim 7, characterized in that, The reforming hydrogen production unit also includes a tail gas treatment device, which is used to receive the tail gas discharged from the separation and purification equipment and adsorb and purify the tail gas to remove carbon dioxide, and then supply the tail gas to the tail gas waste heat recovery unit.

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