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CN116161619A - Online hydrogen production system for methanol of hydrogen diesel locomotive - Google Patents

Online hydrogen production system for methanol of hydrogen diesel locomotive Download PDF

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Publication number
CN116161619A
CN116161619A CN202310227471.5A CN202310227471A CN116161619A CN 116161619 A CN116161619 A CN 116161619A CN 202310227471 A CN202310227471 A CN 202310227471A CN 116161619 A CN116161619 A CN 116161619A
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China
Prior art keywords
hydrogen
methanol
heat exchanger
pressure
internal combustion
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CN202310227471.5A
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Chinese (zh)
Inventor
张志鸿
牟俊彦
李廉枫
张薛凯
胡利航
张俊琰
王强
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CRRC Ziyang Co Ltd
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CRRC Ziyang Co Ltd
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Priority to CN202310227471.5A priority Critical patent/CN116161619A/en
Publication of CN116161619A publication Critical patent/CN116161619A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
    • F02B43/12—Methods of operating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/02—Processes for making hydrogen or synthesis gas
    • C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
    • C01B2203/0211—Processes for making hydrogen or synthesis gas containing a reforming step containing a non-catalytic reforming step
    • C01B2203/0216—Processes for making hydrogen or synthesis gas containing a reforming step containing a non-catalytic reforming step containing a non-catalytic steam reforming step
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/08—Methods of heating or cooling
    • C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/08—Methods of heating or cooling
    • C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
    • C01B2203/0838—Methods of heating the process for making hydrogen or synthesis gas by heat exchange with exothermic reactions, other than by combustion of fuel
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/08—Methods of heating or cooling
    • C01B2203/0872—Methods of cooling
    • C01B2203/0883—Methods of cooling by indirect heat exchange
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/12—Feeding the process for making hydrogen or synthesis gas
    • C01B2203/1205—Composition of the feed
    • C01B2203/1211—Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
    • C01B2203/1217—Alcohols
    • C01B2203/1223—Methanol
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/12—Feeding the process for making hydrogen or synthesis gas
    • C01B2203/1288—Evaporation of one or more of the different feed components
    • C01B2203/1294—Evaporation by heat exchange with hot process stream

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The invention discloses an online hydrogen production system for methanol of a hydrogen diesel locomotive, which comprises the following components: the device comprises a methanol tank, a hydrogen production module, a low-pressure hydrogen storage tank, a methanol pump, a hydrogen internal combustion engine, a water tank, an electric heater, a controller and a first pressure sensor; the controller obtains the pressure in the low-pressure hydrogen storage tank based on a first pressure sensor arranged in the low-pressure hydrogen storage tank; when the pressure of the hydrogen in the low-pressure hydrogen storage tank meets the starting condition of the hydrogen internal combustion engine, inputting the hydrogen into the hydrogen internal combustion engine by the low-pressure hydrogen storage tank to finish the starting of the hydrogen internal combustion engine; when the pressure in the low-pressure hydrogen storage tank does not meet the condition of starting the hydrogen internal combustion engine, the controller respectively controls the methanol tank and the water tank to convey methanol and water to the electric heater, the electric heater heats the received methanol and water into steam and then sends the steam into the hydrogen production module, and the hydrogen production module prepares the hydrogen for starting the hydrogen internal combustion engine to finish the starting of the internal combustion engine. The on-line hydrogen production system for the methanol of the hydrogen diesel locomotive realizes on-line hydrogen production of the methanol in the locomotive.

Description

Online hydrogen production system for methanol of hydrogen diesel locomotive
Technical Field
The invention belongs to the field of new energy rail transit, and particularly relates to a methanol online hydrogen production system of a hydrogen diesel locomotive.
Background
In the field of rail transit, electrified railways are increasingly the primary way of railway construction development, but are limited by factors such as regional economic development, natural condition limitation and the like, and non-electrified railways still exist for a long time and occupy a large proportion. The hydrogen energy has zero pollution, high efficiency and rich sources, and is an important carrier for promoting the upgrading and transformation, boosting the peak of carbon and neutralizing carbon of various application fields of the traditional internal combustion engine. The utilization mode of the hydrogen energy mainly comprises two modes, namely a fuel cell and a hydrogen internal combustion engine, wherein the fuel cell has the advantages of high efficiency and zero emission, but has the disadvantages of high cost, low service life, small single-stack power, high requirement on the purity of hydrogen and the like compared with the hydrogen internal combustion engine; the hydrogen internal combustion engine has the heat efficiency close to that of a fuel cell, can realize the advantages of low emission, low cost, long service life, wide gas application range and the like.
Because hydrogen has the characteristics of inflammability, explosiveness, low density, easy diffusion and the like, the transportation, storage and filling costs of the hydrogen are high and certain safety risks exist. One of the key issues in hydrogen fuel applications today is the supply of hydrogen. Methanol is a low-carbon fuel which is rich in production raw materials and can realize carbon neutral circulation, and compared with hydrogen energy, the methanol is cheaper, convenient to store and transport, has higher energy density and higher safety. Methanol is used for direct combustion of internal combustion engine, and the exhaust gas contains alcohols, formaldehyde and CO 2 Harmful substances such as CO and HC. Methanol is the best carrier of hydrogen energy for human cognition at present, andthe methanol reforming hydrogen production technology enters into large-scale industrial construction and production, and can promote the wide application of hydrogen energy through the methanol reforming hydrogen production.
Thus, there is a need for a related system that enables locomotive methanol to produce hydrogen.
Disclosure of Invention
The invention aims at: in order to overcome the problems in the prior art, the invention discloses an online hydrogen production system for methanol of a hydrogen diesel locomotive, and the online hydrogen production system for methanol of the hydrogen diesel locomotive is used for realizing online hydrogen production of methanol in the locomotive.
The aim of the invention is achieved by the following technical scheme:
an online hydrogen production system for methanol of a hydrogen diesel locomotive, the online hydrogen production system for methanol of the hydrogen diesel locomotive comprises: the device comprises a methanol tank, a hydrogen production module, a low-pressure hydrogen storage tank, a methanol pump, a hydrogen internal combustion engine, a water tank, an electric heater, a controller and a first pressure sensor; the controller obtains the pressure in the low-pressure hydrogen storage tank based on a first pressure sensor arranged in the low-pressure hydrogen storage tank; when the pressure of the hydrogen in the low-pressure hydrogen storage tank meets the starting condition of the hydrogen internal combustion engine, inputting the hydrogen into the hydrogen internal combustion engine by the low-pressure hydrogen storage tank to finish the starting of the hydrogen internal combustion engine; when the pressure in the low-pressure hydrogen storage tank does not meet the condition of starting the hydrogen internal combustion engine, the controller respectively controls the methanol tank and the water tank to convey methanol and water to the electric heater, the electric heater heats the received methanol and water into steam and then sends the steam into the hydrogen production module, and the hydrogen production module prepares the hydrogen for starting the hydrogen internal combustion engine to finish the starting of the internal hydrogen internal combustion engine.
According to a preferred embodiment, the hydrogen diesel locomotive methanol on-line hydrogen production system further comprises: the heat exchanger comprises a heat exchanger, a primary heat exchanger and a secondary heat exchanger; the hydrogen production module is connected with the low-pressure hydrogen storage tank through a heat exchanger, a heat source is provided for the heat exchanger through the heat carried by the produced hydrogen, and the heat exchanger is arranged at the outlet end of the methanol tank; exhaust gas generated by combustion of the hydrogen internal combustion engine sequentially flows through the primary heat exchanger and the secondary heat exchanger and is discharged outside, so that a heat source is provided for the primary heat exchanger and the secondary heat exchanger; after the hydrogen internal combustion engine is started and stably runs, the controller controls the water in the water tank to flow to the secondary heat exchanger for heating and then is sprayed into the primary heat exchanger; the controller controls the methanol in the methanol tank to be heated by the heat exchanger and then pressurized and then input into the secondary heat exchanger; and the secondary heat exchanger conveys the heated methanol and water mixed steam to the hydrogen production module to complete the hydrogen production operation.
According to a preferred embodiment, a second pressure sensor and a first temperature sensor are arranged in the primary heat exchanger and are used for monitoring the pressure and the temperature of mixed steam in the primary heat exchanger; when the mixed steam in the primary heat exchanger is monitored to meet the preset hydrogen production condition, the corresponding mixed steam is introduced into the hydrogen production module.
According to a preferred embodiment, a third pressure sensor and a second temperature sensor for completing real-time pressure and temperature monitoring are arranged in the hydrogen production module, and real-time adjustment of inflow flow of the primary heat exchanger is completed through real-time pressure and temperature monitoring in the hydrogen production module.
According to a preferred embodiment, a second flow control valve is arranged between the primary heat exchanger and the hydrogen production module, and is used for controlling the flow of the primary heat exchanger into the hydrogen production module.
According to a preferred embodiment, an ejector is arranged in the primary heat exchanger, and the water body in the secondary heat exchanger is ejected into the primary heat exchanger through the ejector.
According to a preferred embodiment, a liquid level sensor is arranged in the secondary heat exchanger and is used for completing liquid level monitoring of the water body introduced into the secondary heat exchanger.
According to a preferred embodiment, a hydrogen supply module is arranged between the low-pressure hydrogen storage tank and the hydrogen internal combustion engine, and the flow rate and the pressure of the gas injected into the hydrogen internal combustion engine are regulated through the hydrogen supply module.
According to a preferred embodiment, the outlet end of the methanol tank is provided with a methanol pump for realizing methanol output and/or pressurization in the methanol tank; and a water pump is arranged at the outlet end of the water tank.
According to a preferred embodiment, the outlet of the methanol pump is further provided with a pressure relief valve, through which excess methanol is returned to the methanol tank when the methanol pump outlet pressure is higher than a preset value.
The foregoing inventive concepts and various further alternatives thereof may be freely combined to form multiple concepts, all of which are contemplated and claimed herein. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The methanol on-line hydrogen production system of the hydrogen diesel locomotive has the beneficial effects that:
the methanol is used for online hydrogen production, so that hydrogenation equipment is omitted for locomotive users, the problems of large-scale hydrogen storage management and the like are solved, the safety risk is reduced, and the use and maintenance cost of the whole locomotive is reduced.
The low-pressure hydrogen storage tank is used for storing the hydrogen produced by the hydrogen production module, so that the stability of hydrogen supply and the requirement of instantaneous high power on hydrogen production are ensured, and the hydrogen supply in the starting stage of the hydrogen internal combustion engine is solved.
The energy demand of on-line hydrogen production can be met by recycling the exhaust heat twice and recycling the heat of the prepared high-temperature hydrogen, and the energy efficiency of the whole system is higher than that of a traditional hybrid power locomotive.
The methanol and the water are stored separately, the water tank can be arranged in an on-vehicle power room, and the methanol tank is suspended below the vehicle, so that the space utilization of a locomotive is more reasonable, and more fuel is carried.
Drawings
FIG. 1 is a schematic diagram of a methanol on-line hydrogen production system for a hydrogen diesel locomotive according to the present invention;
FIG. 2 is a schematic diagram of the methanol on-line hydrogen production system of the hydrogen diesel locomotive of the invention;
FIG. 3 is a schematic diagram of the methanol on-line hydrogen production system of the hydrogen diesel locomotive of the invention;
the device comprises a 1-methanol tank, a 2-hydrogen production module, a 3-low pressure hydrogen storage tank, a 4-power chamber, a 5-energy recovery device, a 6-heat exchanger, a 7-methanol pump, an 8-hydrogen internal combustion engine, a 9-water tank, a 10-electric heater, an 11-primary heat exchanger, a 12-secondary heat exchanger, a 13-water pump, a 14-controller, a 15-first pressure sensor, a 16-methanol three-way valve, a 17-water three-way valve, a 18-first flow control valve, a 19-injector, a 20-second pressure sensor, a 21-first temperature sensor, a 22-second flow control valve, a 23-third pressure sensor, a 24-second temperature sensor, a 25-hydrogen supply module, a 26-liquid level sensor and a 27-pressure release valve.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, in the present invention, if a specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, position relationship, power source relationship, etc. related to the present invention can be known by those skilled in the art without any creative effort.
Example 1:
referring to fig. 1, there is shown an on-line hydrogen production system for methanol of a hydrogen diesel locomotive, the on-line hydrogen production system for methanol of a hydrogen diesel locomotive includes: the hydrogen production system comprises a methanol tank 1, a hydrogen production module 2, a low-pressure hydrogen storage tank 3, a heat exchanger 6, a methanol pump 7, a hydrogen internal combustion engine 8, a water tank 9, an electric heater 10, a primary heat exchanger 11, a secondary heat exchanger 12, a controller 14 and a first pressure sensor 15. The controller 14 is used to complete the control of the various functional devices within the system.
Preferably, the controller 14 obtains the pressure in the low-pressure hydrogen storage tank based on a first pressure sensor 15 provided in the low-pressure hydrogen storage tank 3.
When the pressure of the hydrogen gas in the low-pressure hydrogen storage tank satisfies the start condition of the hydrogen internal combustion engine 8, the low-pressure hydrogen storage tank supplies the hydrogen gas to the hydrogen internal combustion engine 8, and the hydrogen internal combustion engine 8 is started.
When the pressure in the low-pressure hydrogen storage tank does not meet the starting condition of the hydrogen internal combustion engine 8, the controller 14 respectively controls the methanol tank 1 and the water tank 9 to convey methanol and water to the electric heater 10. The electric heater 10 heats the received methanol and water into steam and then sends the steam into the hydrogen production module 2, and the hydrogen production module 2 prepares the starting hydrogen of the hydrogen internal combustion engine 8 to finish the starting of the internal combustion engine.
Specifically, the electric heater 10 is heated by using the electric energy of the power battery or the ground electricity, so that the methanol water is evaporated into high-temperature and high-pressure steam, and the mixed steam is introduced into the hydrogen production module 2 through the first flow control valve 18 to produce a small amount of hydrogen for starting the machine.
Preferably, the hydrogen production module 2 is connected with the low-pressure hydrogen storage tank 3 through a heat exchanger 6, a heat source is provided for the heat exchanger 6 by the heat carried by the produced hydrogen, and the heat exchanger 6 is arranged at the outlet end of the methanol tank 1.
Preferably, the exhaust gas generated by the combustion of the hydrogen internal combustion engine 8 flows through the primary heat exchanger 11 and the secondary heat exchanger 12 in sequence and then is discharged outside, so as to provide a heat source for the primary heat exchanger 11 and the secondary heat exchanger 12.
After the hydrogen internal combustion engine 8 is started and stably runs, the controller 14 controls the water in the water tank 9 to flow to the secondary heat exchanger 12 for heating and then is sprayed into the primary heat exchanger 11. The controller 14 controls the methanol in the methanol tank 1 to be heated by the heat exchanger 6 and then to be pressurized and then to be input into the secondary heat exchanger 12. The secondary heat exchanger 12 conveys the heated methanol and water mixed steam to the hydrogen production module 2 to complete the hydrogen production operation.
Further, a second pressure sensor 20 and a first temperature sensor 21 are disposed in the primary heat exchanger 11, so as to monitor the pressure and temperature of the mixed steam in the primary heat exchanger 11. When the mixed steam in the primary heat exchanger 11 is monitored to meet the preset hydrogen production condition, the corresponding mixed steam is introduced into the hydrogen production module 2.
Preferably, a third pressure sensor 23 and a second temperature sensor 24 for real-time pressure and temperature monitoring are arranged in the hydrogen production module 2, and real-time adjustment of inflow flow of the primary heat exchanger 11 is achieved through real-time pressure and temperature monitoring in the hydrogen production module 2.
Further, a second flow control valve 22 is disposed between the primary heat exchanger 11 and the hydrogen production module 2, so as to complete the flow control of the primary heat exchanger 11 flowing into the hydrogen production module 2.
Preferably, an ejector is arranged in the primary heat exchanger 11, and the water in the secondary heat exchanger 12 is ejected into the primary heat exchanger 11 through the ejector.
Preferably, a liquid level sensor is disposed in the secondary heat exchanger 12, so as to complete the monitoring of the liquid level of the water body introduced into the secondary heat exchanger 12.
Preferably, a hydrogen supply module is arranged between the low-pressure hydrogen storage tank 3 and the hydrogen internal combustion engine 8, and the flow and pressure of the gas injected into the hydrogen internal combustion engine 8 are regulated through the hydrogen supply module.
Preferably, the outlet end of the methanol tank 1 is provided with a methanol pump 7 for realizing the output and/or pressurization of the methanol in the methanol tank 1; the outlet end of the water tank 9 is provided with a water pump.
Further, the outlet of the methanol pump 7 is further provided with a pressure relief valve, and when the outlet pressure of the methanol pump 7 is higher than a preset value, the excessive methanol is returned to the methanol tank 1 through the pressure relief valve.
During the hydrogen production process, the controller 14 can control the flow rates of the methanol pump 7 and the water injector 19 according to the pressure in the low-pressure hydrogen storage tank 3. And the controller 14 can control the working state and flow of the water pump 13 according to the water level condition of the liquid level sensor 26 in the secondary heat exchanger 12.
Specifically, referring to FIGS. 2 and 3, the structural arrangement of the methanol on-line hydrogen production system of the hydrogen diesel locomotive of the present invention on the locomotive may be as follows.
A methanol tank 1 is hung below the locomotive, a hydrogen production module 2 is arranged at the upper part of the locomotive, and a low-pressure hydrogen storage tank 3 is arranged at the upper part of the hydrogen production module 2. An exhaust energy recovery device 5, a heat exchanger 6, a methanol pump 7, a water tank 9 for storing desalted water for reforming hydrogen production and an electric heater 10 are arranged in the power chamber 4.
The produced high-temperature hydrogen is stored in the low-pressure hydrogen storage tank 3 after heat exchange and temperature reduction with methanol in the plate heat exchanger 6. The methanol from the methanol tank 1 is heated by the heat exchanger 6 and then is sprayed into the primary heat exchanger by the methanol pump 7, and the methanol pump is preferably a positive displacement pump, so that accurate flow control and certain spraying pressure can be ensured.
The water tank 9 and the exhaust energy recovery device 5 are arranged on two sides of the locomotive side by side, and the exhaust heat recovery device is divided into a primary heat exchanger 11 at the lower part and a secondary heat exchanger 12 at the upper part. The water in the water tank is conveyed to the secondary heat exchanger 12 through the water pump 13 for heat exchange, and then is sprayed into the primary heat exchanger 11 with methanol according to a certain proportion. The electric heater 10 has the function that when the hydrogen internal combustion engine needs to be started and the pressure in the hydrogen storage tank does not meet the condition or the electric quantity is too high in the braking energy recovery process, a small amount of hydrogen can be prepared by generating high-temperature and high-pressure methanol water mixed steam through the electric heater, so that the hydrogen internal combustion engine can be started normally or more energy can be recovered.
The methanol on-line hydrogen production system of the hydrogen diesel locomotive saves hydrogenation equipment for locomotive users through the methanol on-line hydrogen production technology, solves the problems of large-scale hydrogen storage management and the like, reduces the safety risk and lowers the use and maintenance cost of the whole locomotive.
The on-line hydrogen production system for the methanol of the hydrogen diesel locomotive stores the hydrogen produced by the hydrogen production module through the low-pressure hydrogen storage tank, ensures the stability of hydrogen supply and the requirement of instantaneous high power on hydrogen production, and solves the hydrogen supply in the starting stage of the hydrogen diesel locomotive.
The online hydrogen production system for the methanol of the hydrogen diesel locomotive can meet the energy requirement of online hydrogen production by recycling the exhaust heat twice and recycling the heat of the prepared high-temperature hydrogen, and the energy efficiency of the whole system is higher than that of a traditional hybrid power locomotive.
The methanol on-line hydrogen production system of the hydrogen diesel locomotive stores methanol and water independently, a water tank can be arranged in an on-board power room, and the methanol tank is suspended below the locomotive, so that the space utilization of the locomotive is more reasonable, and more fuel is carried.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (10)

1. The methanol on-line hydrogen production system of the hydrogen diesel locomotive is characterized by comprising the following components: the hydrogen production device comprises a methanol tank (1), a hydrogen production module (2), a low-pressure hydrogen storage tank (3), a methanol pump (7), a hydrogen internal combustion engine (8), a water tank (9), an electric heater (10), a controller (14) and a first pressure sensor (15);
the controller (14) obtains the pressure in the low-pressure hydrogen storage tank (3) based on a first pressure sensor (15) arranged in the low-pressure hydrogen storage tank (3);
when the pressure of the hydrogen in the low-pressure hydrogen storage tank (3) meets the starting condition of the hydrogen internal combustion engine (8), inputting the hydrogen into the hydrogen internal combustion engine (8) by the low-pressure hydrogen storage tank (3) to finish the starting of the hydrogen internal combustion engine (8);
when the pressure in the low-pressure hydrogen storage tank (3) does not meet the starting condition of the hydrogen internal combustion engine (8), the controller (14) respectively controls the methanol tank (1) and the water tank (9) to convey methanol and water to the electric heater (10), the electric heater (10) heats the received methanol and water into steam and then sends the steam into the hydrogen production module (2), and the hydrogen production module (2) prepares the starting hydrogen of the hydrogen internal combustion engine (8) to finish the starting of the hydrogen internal combustion engine (8).
2. The hydrogen-diesel locomotive methanol on-line hydrogen production system of claim 1, further comprising: a heat exchanger (6), a primary heat exchanger (11) and a secondary heat exchanger (12);
the hydrogen production module (2) is connected with the low-pressure hydrogen storage tank (3) through the heat exchanger (6), heat carried by the produced hydrogen provides a heat source for the heat exchanger (6), and the heat exchanger (6) is arranged at the outlet end of the methanol tank (1);
exhaust gas generated by the combustion of the hydrogen internal combustion engine (8) sequentially flows through the primary heat exchanger (11) and the secondary heat exchanger (12) and is discharged outside, so that a heat source is provided for the primary heat exchanger (11) and the secondary heat exchanger (12);
after the hydrogen internal combustion engine (8) is started and stably runs, the controller (14) controls the water in the water tank (9) to flow to the secondary heat exchanger (12) for heating and then spraying into the primary heat exchanger (11);
the controller (14) controls the methanol in the methanol tank (1) to be heated by the heat exchanger (6) and then to be pressurized and then to be input into the secondary heat exchanger (12);
and the secondary heat exchanger (12) conveys the heated mixed steam of methanol and water to the hydrogen production module (2) to complete the hydrogen production operation.
3. The hydrogen-diesel locomotive methanol on-line hydrogen production system according to claim 2, wherein a second pressure sensor (20) and a first temperature sensor (21) are arranged in the primary heat exchanger (11) and are used for completing pressure and temperature monitoring of mixed steam in the primary heat exchanger (11);
when the mixed steam in the primary heat exchanger (11) is monitored to meet the preset hydrogen production condition, the corresponding mixed steam is introduced into the hydrogen production module (2).
4. A hydrogen internal combustion locomotive methanol on-line hydrogen production system as in claim 3, characterized in that a third pressure sensor (23) and a second temperature sensor (24) for completing real-time pressure and temperature monitoring are arranged in the hydrogen production module (2), and real-time adjustment of inflow flow of the primary heat exchanger (11) is completed through real-time pressure and temperature monitoring in the hydrogen production module (2).
5. The hydrogen-diesel locomotive methanol on-line hydrogen production system as claimed in claim 4, wherein a second flow control valve (22) is arranged between the primary heat exchanger (11) and the hydrogen production module (2) for completing flow control of the primary heat exchanger (11) flowing into the hydrogen production module (2).
6. The hydrogen-diesel locomotive methanol on-line hydrogen production system as claimed in claim 2, wherein an ejector (19) is arranged in the primary heat exchanger (11), and the water in the secondary heat exchanger (12) is ejected into the primary heat exchanger (11) through the ejector (19).
7. The hydrogen-diesel locomotive methanol on-line hydrogen production system as claimed in claim 2, wherein a liquid level sensor (26) is arranged in the secondary heat exchanger (12) for completing the water level monitoring introduced into the secondary heat exchanger (12).
8. The hydrogen on-line methanol hydrogen production system of a hydrogen internal combustion locomotive according to claim 1, wherein a hydrogen supply module (25) is arranged between the low-pressure hydrogen storage tank (3) and the hydrogen internal combustion engine (8), and the gas flow and pressure injected into the hydrogen internal combustion engine (8) are regulated through the hydrogen supply module (25).
9. The hydrogen internal combustion locomotive methanol online hydrogen production system according to claim 1, wherein the outlet end of the methanol tank (1) is provided with a methanol pump (7) for realizing methanol output and/or pressurization in the methanol tank (1); the outlet end of the water tank (9) is provided with a water pump (13).
10. The hydrogen internal combustion locomotive methanol online hydrogen production system as claimed in claim 9, wherein the outlet of the methanol pump (7) is further provided with a pressure relief valve (27), and when the outlet pressure of the methanol pump (7) is higher than a preset value, redundant methanol is returned to the methanol tank (1) through the pressure relief valve (27).
CN202310227471.5A 2023-03-10 2023-03-10 Online hydrogen production system for methanol of hydrogen diesel locomotive Pending CN116161619A (en)

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JPH08319101A (en) * 1995-05-24 1996-12-03 Tokyo Gas Co Ltd Electricity generation
CN1163984A (en) * 1997-01-21 1997-11-05 罗伊·麦克埃里斯特 Engine operating method and apparatus
US20020189245A1 (en) * 2000-10-28 2002-12-19 Ronald Headley Method of operating a combustion apparatus
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CN112983689A (en) * 2021-04-14 2021-06-18 赵宏伟 Vehicle-mounted methanol and/or ethanol hydrogen production device based on engine tail gas preheating
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50112294A (en) * 1974-02-13 1975-09-03
US4230072A (en) * 1974-12-20 1980-10-28 Nippon Soken, Inc. Internal combustion engine with a methanol reforming system
JPH08319101A (en) * 1995-05-24 1996-12-03 Tokyo Gas Co Ltd Electricity generation
CN1163984A (en) * 1997-01-21 1997-11-05 罗伊·麦克埃里斯特 Engine operating method and apparatus
US20020189245A1 (en) * 2000-10-28 2002-12-19 Ronald Headley Method of operating a combustion apparatus
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CN115324780A (en) * 2022-08-03 2022-11-11 中氢新能(北京)新能源技术研究院有限公司 Reforming hydrogen production engine and vehicle

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