CN114718741B - Reforming and recycling system, method and equipment of multi-fuel gas engine - Google Patents

Reforming and recycling system, method and equipment of multi-fuel gas engine Download PDF

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Publication number
CN114718741B
CN114718741B CN202210204080.7A CN202210204080A CN114718741B CN 114718741 B CN114718741 B CN 114718741B CN 202210204080 A CN202210204080 A CN 202210204080A CN 114718741 B CN114718741 B CN 114718741B
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reforming
exhaust
fuel gas
core
gas engine
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CN114718741A (en
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张尊华
黄勇
张熠
徐文鑫
阮智邦
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being 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
    • F02M21/0203—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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hydrogen, Water And Hydrids (AREA)

Abstract

The application discloses a reforming and recycling system, a reforming and recycling method and a reforming and recycling device of a multi-fuel gas engine, wherein the reforming and recycling system comprises the following components: the device comprises a fuel configuration device, an exhaust Y-shaped pipe, a reforming core, a reformer outer cylinder, an exhaust outlet pipe, an exhaust inlet pipe, an exhaust recycling valve and a butterfly valve; the fuel configuration device is connected to the air inlet end of the multi-fuel gas engine and is also connected to the air inlet end of the reforming core; the air inlet end of the exhaust Y-shaped pipe is connected with the exhaust outlet end of the multi-fuel gas engine, the reforming end is connected with the air inlet end of the reforming core through an exhaust gas recirculation valve, and the exhaust discharge end is connected with the first end of the outer cylinder of the reformer through a butterfly valve and an exhaust gas inlet pipe; the reforming core is arranged in the reformer outer barrel, and the second end of the reformer outer barrel, which is far away from the first end, is connected with the waste gas outlet pipe; the air outlet end of the reforming core is connected with the air inlet end of the multi-fuel gas engine. The system can improve combustion stability in the cylinder of the gas engine. The method and the device can be widely applied to the technical field of engines.

Description

Reforming and recycling system, method and equipment of multi-fuel gas engine
Technical Field
The application relates to the technical field of engines, in particular to a reforming and recycling system, a reforming and recycling method and reforming and recycling equipment for a multi-fuel gas engine.
Background
Currently, energy and environmental problems are becoming increasingly a global concern, and engine pollutants (NOx, CH and PM) emissions of gases (methane, ethane, methanol, ammonia, etc.) are severe, while CHx and NH are simultaneously 3 The problems of high ignition temperature and low combustion speed of fuel, easy fire of the engine during low-load operation and knocking of the fuel during high-load operation inhibit the wide application of the gas engine. In contrast, the hydrogen flame propagation speed is high, the lean combustion limit is high, and the hydrogen-doped combustion of the gas fuel (methane, ethane, methanol, ammonia and the like) can accelerate the combustion speed of the mixed fuel, so that the gas fuel is promoted to be completely combusted in the engine cylinder.
In the application process, the hydrogen has the problems of storage, safe transportation and the like, and is practically used on an engineThe existing ammonia and hydrogen mixed combustion application still has a certain difficulty. In the related art, a catalytic reforming hydrogen production device (reformer) can be arranged in an engine exhaust pipe, and unburned HC and O in the exhaust gas are produced by utilizing the waste heat of the engine exhaust gas and a catalyst 2 、H 2 O、CO 2 And reforming to prepare hydrogen-rich mixed gas, and sending the hydrogen-rich mixed gas into an engine for circulating operation, so that the combination of on-line hydrogen loading and EGR is realized, and the generation of engine pollutants is inhibited from the source. The technology can realize the recovery of waste heat and solve the problem of H 2 Preparation, storage and the like, realizes on-line hydrogen-doped combustion of the engine, and is considered to have great potential in improving the performance of the engine. However, in the reforming and recycling system of the related art, the circulation amount of the reformer is difficult to control; and because different gas fuels may need different catalysts, the designed reformer has the problems of inconvenient disassembly and installation.
In view of the above, there is a need to solve the problems of the related art.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the related art to a certain extent.
It is therefore an object of embodiments of the present application to provide a reforming and recycling system, method and apparatus for a multi-fuel gas engine.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the application comprises the following steps:
in one aspect, embodiments of the present application provide a reforming and recycling system of a multi-fuel gas engine, comprising:
the device comprises a fuel configuration device, an exhaust Y-shaped pipe, a reforming core, a reformer outer cylinder, an exhaust outlet pipe, an exhaust inlet pipe, an exhaust recycling valve and a butterfly valve;
the fuel configuration device comprises a plurality of fuel gas storage devices and stop valves corresponding to the gas storage devices, the fuel configuration device is connected to the air inlet end of the multi-fuel gas engine, and the fuel configuration device is also connected to the air inlet end of the reforming core; the exhaust Y-shaped pipe comprises an air inlet end, a reforming end and an exhaust emission end, the air inlet end of the exhaust Y-shaped pipe is connected with the exhaust outlet end of the multi-fuel gas engine, the reforming end of the exhaust Y-shaped pipe is connected with the air inlet end of the reforming core through the exhaust recycling valve, and the exhaust emission end of the exhaust Y-shaped pipe is connected with the first end of the outer cylinder of the reformer through the butterfly valve and the exhaust inlet pipe; the reforming core is arranged in the reformer outer barrel, and a second end of the reformer outer barrel, which is far away from the first end, is connected with the waste gas outlet pipe; and the air outlet end of the reforming core is connected with the air inlet end of the multi-fuel gas engine.
In addition, a reforming and recycling system of a multi-fuel gas engine according to the above embodiment of the present application may further have the following additional technical features:
further, in one embodiment of the present application, the fuel dispensing device includes at least one of a methane gas storage device, an ethane gas storage device, an ethanol gas storage device, or an ammonia gas storage device.
Further, in one embodiment of the present application, the reforming and recycling system of the multi-fuel gas engine further comprises a plasma generator;
the plasma generator is disposed at an air inlet end of the reforming core.
Further, in one embodiment of the present application, the reforming and recycling system of the multi-fuel gas engine further includes an intercooler, a cooling water source, a water storage tank, and a circulating water tower;
the air outlet end of the reforming core is connected with the air inlet end of the multi-fuel gas engine, and the air inlet end of the reforming core is specifically as follows:
the air outlet end of the reforming core is connected with the intercooler, cooling water of the intercooler is provided by the cooling water source, the cooling water outlet of the intercooler is connected with the circulating water tower, and the air outlet end of the intercooler is connected with the air inlet end of the multi-fuel gas engine through the water storage tank.
Further, in one embodiment of the present application, the reforming and recycling system of the multi-fuel gas engine further comprises entrainment means;
the entrainment device is disposed at an intake end of the multi-fuel gas engine.
Further, in one embodiment of the present application, the reforming core includes an expansion angle, a sliding roller, a reforming tube bundle, a connection disc, a wire mesh, and a contraction angle;
the expansion angle is welded with the first end of the reforming tube bundle, the connecting disc is welded with the second end of the reforming tube bundle, holes corresponding to the second end of the reforming tube bundle are formed in the connecting disc, and the reforming tube bundle is used for filling a catalyst; the shrinkage angle is fixedly connected with the connecting disc, and the wire mesh is arranged between the shrinkage angle and the connecting disc; the sliding roller is arranged on the expansion angle, and the reforming core can be detachably connected with the reformer outer barrel through the sliding roller;
the end where the expansion angle is located is the air inlet end of the reforming core, and the end where the contraction angle is located is the air outlet end of the reforming core.
In another aspect, embodiments of the present application provide a reforming and recycling method of a multi-fuel gas engine for controlling the aforementioned reforming and recycling system, the method including the steps of:
detecting a load of the engine when the engine is in a started state;
and when the load is greater than a first preset threshold value, introducing fuel gas into the reforming core, opening the exhaust gas recirculation valve, and starting the plasma generator, the reforming core and the intercooler.
In addition, a reforming and recycling method of a multi-fuel gas engine according to the above embodiment of the present application may further have the following additional technical features:
further, in one embodiment of the present application, the method further comprises:
detecting the temperature of the gas discharged from the gas outlet end of the reforming core;
and when the gas temperature is greater than a second preset threshold value, increasing the flow of cooling water flowing into the intercooler.
In another aspect, embodiments of the present application provide a computer device, including:
at least one processor;
at least one memory for storing at least one program;
the at least one program, when executed by the at least one processor, causes the at least one processor to implement the method of reforming and recycling a multi-fuel gas engine described above.
In another aspect, embodiments of the present application also provide a computer readable storage medium having stored therein a processor executable program which, when executed by a processor, is configured to implement the above-described reforming and recycling method for a multi-fuel gas engine.
The advantages and benefits of the present application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present application.
A reforming and recycling system of a multi-fuel gas engine disclosed in an embodiment of the present application includes: the device comprises a fuel configuration device, an exhaust Y-shaped pipe, a reforming core, a reformer outer cylinder, an exhaust outlet pipe, an exhaust inlet pipe, an exhaust recycling valve and a butterfly valve; the fuel configuration device comprises a plurality of fuel gas storage devices and stop valves corresponding to the gas storage devices, the fuel configuration device is connected to the air inlet end of the multi-fuel gas engine, and the fuel configuration device is also connected to the air inlet end of the reforming core; the exhaust Y-shaped pipe comprises an air inlet end, a reforming end and an exhaust emission end, the air inlet end of the exhaust Y-shaped pipe is connected with the exhaust outlet end of the multi-fuel gas engine, the reforming end of the exhaust Y-shaped pipe is connected with the air inlet end of the reforming core through the exhaust recycling valve, and the exhaust emission end of the exhaust Y-shaped pipe is connected with the first end of the outer cylinder of the reformer through the butterfly valve and the exhaust inlet pipe; the reforming core is arranged in the reformer outer barrel, and a second end of the reformer outer barrel, which is far away from the first end, is connected with the waste gas outlet pipe; and the air outlet end of the reforming core is connected with the air inlet end of the multi-fuel gas engine. The flow of the reformed waste gas of the system is adjustable, so that the combustion mixing amount of the hydrogen-rich reformed gas circulated into the engine is conveniently controlled in real time, the combustion stability of the hydrogen-rich reformed gas to the cylinder of the gas engine is improved, and the pollutant emission of the engine is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description is made with reference to the accompanying drawings of the embodiments of the present application or the related technical solutions in the prior art, it should be understood that, in the following description, the drawings are only for convenience and clarity to describe some embodiments in the technical solutions of the present application, and other drawings may be obtained according to these drawings without any inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a reforming and recycling system of a multi-fuel gas engine according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a reforming core of a reforming and recycling system of a multi-fuel gas engine provided in an embodiment of the present application;
FIG. 3 is a schematic flow diagram of a method of reforming and recycling a multi-fuel gas engine according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
The present application is further described below with reference to the drawings and specific examples. The described embodiments should not be construed as limitations on the present application, and all other embodiments, which may be made by those of ordinary skill in the art without the exercise of inventive faculty, are intended to be within the scope of the present application.
In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is to be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with one another without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.
Currently, energy and environmental problems are becoming increasingly a global concern, and engine pollutants (NOx, CH and PM) emissions of gases (methane, ethane, methanol, ammonia, etc.) are severe, while CHx and NH are simultaneously 3 The problems of high ignition temperature and low combustion speed of fuel, easy fire of the engine during low-load operation and knocking of the fuel during high-load operation inhibit the wide application of the gas engine. In contrast, the hydrogen flame propagation speed is high, the lean combustion limit is high, and the hydrogen-doped combustion of the gas fuel (methane, ethane, methanol, ammonia and the like) can accelerate the combustion speed of the mixed fuel, so that the gas fuel is promoted to be completely combusted in the engine cylinder.
In the application process, the problems of storage, safe transportation and the like of the hydrogen exist, and the application of realizing the mixed combustion of the ammonia and the hydrogen on the engine still has a certain difficulty. In the related art, a catalytic reforming hydrogen production device (reformer) can be arranged in an engine exhaust pipe, and unburned HC and O in the exhaust gas are produced by utilizing the waste heat of the engine exhaust gas and a catalyst 2 、H 2 O、CO 2 And reforming to prepare hydrogen-rich mixed gas, and sending the hydrogen-rich mixed gas into an engine for circulating operation, so that the combination of on-line hydrogen loading and EGR is realized, and the generation of engine pollutants is inhibited from the source. The technology can realize the recovery of waste heat and solve the problem of H 2 Preparation, storage and the like, realizes on-line hydrogen-doped combustion of the engine, and is considered to have great potential in improving the performance of the engine. However, in the reforming and recycling system of the related art, the circulation amount of the reformer is difficult to control; and because different gas fuels may need different catalysts, the designed reformer has the problems of inconvenient disassembly and installation.
In view of this, embodiments of the present application provide a reforming and recycling system, a method and an apparatus for a multi-fuel gas engine, where the system designs an engine exhaust-fuel reforming and recycling system with an adjustable reformed gas circulation amount and supporting different gas fuels (methane, ethane, ethanol, ammonia, etc.); the system provides a reforming core which is easy to disassemble and assemble, can be filled with catalysts of different structures, shapes and types, and improves the compatibility of the reformer for different catalysts; in addition, the reforming core and the plasma generator in the system are operated in series, so that the problem of poor hydrogen production efficiency of waste gas-fuel reforming under the condition that the temperature of the gas engine is relatively low can be obviously solved.
Next, a reforming recirculation system of a multi-fuel gas engine in an embodiment of the present application will be explained and explained first.
Referring to fig. 1, in an embodiment of the present application, a reforming and recycling system of a multi-fuel gas engine mainly includes:
a fuel arrangement device 18, an exhaust gas Y-pipe 2, a reforming core 5, a reformer outer cylinder 8, an exhaust gas outlet pipe 9, an exhaust gas inlet pipe 12, an exhaust gas recirculation valve 3, and a butterfly valve 4;
the fuel configuration device 18 comprises a plurality of fuel gas storage devices and stop valves corresponding to the gas storage devices, the fuel configuration device 18 is connected to the air inlet end of the multi-fuel gas engine 1, and the fuel configuration device 18 is also connected to the air inlet end of the reforming core 5; the exhaust gas Y-shaped pipe 2 comprises an air inlet end, a reforming end 201 and an exhaust gas discharge end 202, the air inlet end of the exhaust gas Y-shaped pipe 2 is connected with the exhaust gas outlet end of the multi-fuel gas engine 1, the reforming end 201 of the exhaust gas Y-shaped pipe 2 is connected with the air inlet end of the reforming core 5 through the exhaust gas recirculation valve 3, and the exhaust gas discharge end 202 of the exhaust gas Y-shaped pipe 2 is connected with the first end of the reformer outer cylinder 8 through the butterfly valve 4 and the exhaust gas inlet pipe 12; the reforming core 5 is arranged inside the reformer outer cylinder 8, and a second end of the reformer outer cylinder 8 away from the first end is connected to the exhaust gas outlet pipe 9; the air outlet end of the reforming core 5 is connected with the air inlet end of the multi-fuel gas engine 1.
Referring to fig. 1, the reforming and recycling system of the multi-fuel gas engine provided in the embodiment of the application can be used in the technical field of engines. Specifically, the reforming and recycling system includes, but is not limited to, a fuel arrangement device 18, an exhaust gas Y-pipe 2, a reforming core 5, a reformer outer cylinder 8, an exhaust gas outlet pipe 9, an exhaust gas inlet pipe 12, an exhaust gas recycling valve 3, a butterfly valve 4, and the like, wherein the fuel arrangement device 18 is used for providing various types of fuel required for combustion to the multi-fuel gas engine 1. Here, the fuel arrangement means 18 may provide a fuel of a type including at least one of methane, ethane, ethanol or ammonia, and accordingly, the fuel arrangement means 18 includes at least one of methane storage means, ethane storage means, ethanol storage means or ammonia storage means. For each gas storage device, a corresponding stop valve can be arranged to control the condition of the inlet of the gas storage device. In this embodiment of the present application, a stop valve may be additionally disposed on the total gas distribution pipeline, for controlling the overall gas inlet condition. It should be noted that, in the embodiment of the present application, the fuel configuration device 18 may also be used to provide the reforming core 5 with the fuel required for the reforming operation, so as to achieve the hydrogen production by the exhaust gas-fuel reforming in the reforming core 5.
In this embodiment, the exhaust Y-shaped tube 2 includes an air inlet end, a reforming end 201 and an exhaust gas discharge end 202, where the air inlet end of the exhaust Y-shaped tube 2 is connected to an exhaust gas outlet end of the multi-fuel gas engine 1, for receiving exhaust gas discharged from the multi-fuel gas engine 1, and the exhaust gas entering the exhaust Y-shaped tube 2 has two outlet channels, including the reforming end 201 capable of conveying reformed exhaust gas and the exhaust gas discharge end 202 capable of discharging exhaust gas to the atmosphere. For the reforming end 201, it is connected to the air inlet end of the reforming core 5 through the exhaust gas recirculation valve 3, the reforming core 5 is filled with a corresponding catalyst, the catalyst may include a particle type or a structure type catalyst, the exhaust gas input into the reforming core 5 by the reforming end 201 can perform reforming hydrogen production operation, the air outlet end of the reforming core 5 is connected to the air inlet end of the multi-fuel gas engine 1, and the reformed gas containing rich hydrogen obtained by reforming can be fed into the multi-fuel gas engine 1 to realize fuel hydrogen-loading combustion. For the exhaust gas discharge end 202, it is connected to the first end of the reformer outer tube 8 via the butterfly valve 4 and the exhaust gas inlet tube 12, where the exhaust gas recirculation valve 3 functions to control the flow of exhaust gas into the reforming end 201, and the butterfly valve 4 functions to control the flow of exhaust gas into the exhaust gas discharge end 202. The coordination of the two can flexibly control the condition that the waste gas is introduced into the reforming end 201, and adjust the quantity of the obtained reformed gas, so that the real-time adjustment of the reforming operation can be conveniently realized according to specific operation requirements. The exhaust gas entering the reformer outer tub 8 through the exhaust gas discharge end 202 is required to be discharged from the exhaust gas outlet pipe 9 connected to the second end of the reformer outer tub 8, which is far from the first end, through the reforming core 5, so that heat and heat preservation can be provided for the exhaust gas-fuel reforming process inside the reforming core 5 in the exhaust gas discharging process, thereby improving the efficiency of reforming hydrogen production and the energy utilization rate.
In some embodiments, the reforming and recycling system of the multi-fuel gas engine further comprises a plasma generator 7;
the fuel arrangement means 18 and the reforming end 201 of the exhaust Y-pipe 2 are connected to the air inlet end of the reforming core 5 via the plasma generator 7.
In this embodiment of the application, the front end of the air inlet end of the reforming core 5 may be provided with the plasma generator 7, and the plasma generator 7 may form a low-temperature plasma after being charged, and after the exhaust gas flow passes through, the generation of free radicals in the exhaust gas may be promoted, so as to improve the chemical activity of the exhaust gas flow, and be favorable to improving the efficiency of the exhaust gas-fuel reforming in the reforming core 5.
In some embodiments, the reforming and recycling system of the multi-fuel gas engine further comprises an intercooler 13, a cooling water source 14, a water storage tank 16 and a circulating water tower 15;
the air outlet end of the reforming core 5 is connected with the air inlet end of the multi-fuel gas engine 1, which specifically comprises:
the air outlet end of the reforming core 5 is connected with the intercooler 13, cooling water of the intercooler 13 is provided by the cooling water source 14, a cooling water outlet of the intercooler 13 is connected with the circulating water tower 15, and the air outlet end of the intercooler 13 is connected with the air inlet end of the multi-fuel gas engine 1 through the water storage tank 16.
In this embodiment, on the pipe where the air outlet end of the reforming core 5 is connected to the air inlet end of the multi-fuel gas engine 1, a related cooling device may be further disposed, and specifically, the cooling device herein may include an intercooler 13, a cooling water source 14, a water storage tank 16, and a circulating water tower 15. The number of the intercoolers 13 may be plural, and this application is not limited thereto. The intercooler 13 may cool the reformed gas through the cooling water source 14, and a cooling water outlet of the intercooler 13 may be connected to the circulation water tower 15, thereby achieving recovery of cooling water. A water storage tank 16 for storing the cooled and liquefied moisture in the reformed gas is provided downstream of the intercooler 13.
In some embodiments, the reforming and recycling system of the multi-fuel gas engine further comprises entrainment means 17;
the entrainment device 17 is provided at the intake end of the multi-fuel gas engine 1.
In this embodiment of the present application, the entrainment device 17 may be further disposed at the intake end of the multi-fuel gas engine 1, so as to improve the efficiency of gas entering the intake end of the multi-fuel gas engine 1, thereby improving the combustion characteristics of the multi-fuel gas engine 1.
Next, a structure of a reforming and recirculating system of a multi-fuel gas engine provided in an embodiment of the present application will be described in detail with reference to fig. 1.
Fig. 1 is a schematic structural diagram of a reforming and recirculating system of a multi-fuel gas engine 1 with an adjustable reformed gas circulation amount according to an embodiment of the present application. The gas engine can burn different gas fuels according to practical application requirements, the gas fuels are stored by the fuel configuration device 18, and the combustion work can be performed based on the different gas fuels through the stop valves and the gas distribution pipelines on the relevant pipelines. The exhaust pipeline of the multi-fuel gas engine 1 is connected with an exhaust Y-shaped pipe 2, and the exhaust is divided into two paths through the Y-shaped pipe, wherein one path of high-temperature exhaust enters a reforming core 5: i.e. through the reforming end 201 through the exhaust gas recirculation valve 3 (REGR valve) into the inlet tube 6 of the reforming core 5 and premixed with the reformed fuel injected through the reformed fuel inlet tube, forming an exhaust gas-fuel reforming mixture. The waste gas-fuel reforming mixture flows into a plasma generator 7, is excited and activated under the action of a pulse electric field and high temperature of waste gas, the activated waste gas-fuel reforming mixture flows into a reforming core 5, a catalyst is filled in the reforming core 5, the activated waste gas-fuel reforming mixture generates a waste gas-fuel reforming hydrogen production process under the action of the catalyst and the high temperature waste gas in an outer cylinder 8 of the reformer, the prepared high temperature hydrogen-rich reformed gas flows into two intercoolers 13 connected in series through a reformed gas outlet pipe 11 and a U-shaped connecting pipe for cooling, water generated in the cooling process is gathered into a water storage tank 16, and finally, the low temperature hydrogen-rich reformed gas is mixed with air sucked by an air pipeline through an inlet pipe 6 of the reformed gas and then is sent into a multi-fuel gas engine 1 through a entrainment device 17, so that the purposes of stable combustion and low pollutant emission in the cylinder of the multi-fuel gas engine 1 are achieved. Specifically, in connection, two ends of the REGR valve are respectively and fixedly connected with the reforming end 201 of the Y-shaped pipe through a flange plate and a quick-release joint, the inlet pipe 6 is welded and connected with the outer cylinder 8 of the reformer, the electric energy required by the plasma generator 7 is provided by a power supply and is fixedly connected with the outer cylinder 8 of the reformer through the flange plate, the inlet pipe 6 is connected with the fuel configuration device 18 through a stop valve and a gas distribution pipeline, and the other end of the reforming core 5 is fixedly connected with the outlet pipe 11 of the reformed gas through the flange plate. The intercooler 13 and the reformed gas outlet pipe 11 are fixedly connected through flanges at two ends of the U pipe 10, the intercoolers 13 in series connection and the intercooler 13 and the water storage tank 16 are fixedly connected through flanges, cooling water required by the intercooler 13 is provided through a cooling water source 14, a stop valve and an inlet waterway, and cooling water recovery is realized through an outlet waterway of a cooling water outlet of the intercooler 13 and the circulating water tower 15.
The other high-temperature exhaust gas of the exhaust gas Y-shaped pipe 2 flows into the outer cylinder 8 of the reformer through the exhaust gas inlet pipe 12 under the control of the butterfly valve 4, and the high-temperature exhaust gas can provide heat and heat preservation for the mixed fuel excitation activation process in the plasma generator and the exhaust gas-fuel reforming process in the reforming core 5, and the exhaust gas after heat utilization is discharged into the atmosphere through the exhaust gas outlet pipe 9. Wherein, butterfly valve 4 both ends are respectively through ring flange and Y pipe and exhaust gas inlet pipe 12 fixed connection, and exhaust gas inlet pipe 12 and exhaust gas outlet pipe 9 are all through welded fastening with reformer urceolus 8. It should be emphasized that, in order to realize real-time control of the exhaust gas limiting flow rate of the engine exhaust gas into the reforming core 5, the opening degree of the butterfly valve 4 may be adjusted, so as to control the pressure drop difference of the pipeline between the exhaust gas entering the reforming core 5 and the exhaust gas entering the outer cylinder 8 of the reformer, thereby realizing real-time adjustment of the limiting exhaust gas flow rate entering the reforming core 5.
In the embodiment of the application, the flange plates can be fixedly connected with each other, and can be sealed by copper gaskets; the recirculation system can be also provided with temperature sensors which are respectively used for measuring the temperature of the reformed waste gas, the discharged waste gas of the reformer, the outlet temperature of the reformed gas, the inlet waste gas temperature of the reformer and the cooled temperature of the reformed gas, so that the working state of the system can be conveniently controlled according to the temperature data.
Referring to fig. 2, in some embodiments, the reforming core 5 includes an expansion angle 901, a sliding roller 902, a reforming tube bundle 903, a connecting disc 904, a wire mesh 905, and a contraction angle 906;
the expansion angle 901 is welded to a first end of the reforming tube bundle 903, the connecting disc 904 is welded to a second end of the reforming tube bundle 903, holes corresponding to the second end of the reforming tube bundle 903 are formed in the connecting disc 904, and the reforming tube bundle 903 is used for filling a catalyst; the contraction angle 906 and the connection disc 904 are fixedly connected, and the wire mesh 905 is arranged between the contraction angle 906 and the connection disc 904; the sliding roller 902 is arranged on the expansion angle 901, and the reforming core 5 can be detachably connected with the reformer outer cylinder 8 through the sliding roller 902;
the end where the expansion angle 901 is located is an air inlet end of the reforming core 5, and the end where the contraction angle 906 is located is an air outlet end of the reforming core 5.
In particular, in the embodiment of the present application, a detachable reforming core 5 is further provided, and fig. 2 is a schematic structural diagram of the reforming core 5. The plasma generator 7 with flange plate can be connected with the expansion angle 901 by welding, a plurality of sliding rollers 902 uniformly distributed on the circumference are welded on the expansion angle 901, and the sliding rollers 902 are used for installing the reforming core 5 into the reforming outer cylinder. Both ends of the reforming tube bundle 903 are respectively connected with the expansion angle 901 and the connecting disc 904 by welding, and the reforming tube bundle 903 can be filled with a catalyst. Wire mesh 905 may be fixedly coupled to the connection plate 904 through bolt holes for preventing catalyst from falling out of the reforming tube bundle 903 during installation and operation of the reforming core 5. Next, the contraction angle 906 may be fixedly coupled to the connection disk 904 by a contraction angle flange 907, wherein the contraction angle 906 is sealed to the connection disk 904 with a copper gasket, and a metal bellows 909 having a contraction angle outlet flange 908 is welded to the reformed gas outlet end of the contraction angle 906. In the embodiment of the present application, the reforming core 5 is fixedly coupled to flanges at both ends of the reformer outer tub 8 through a reforming core flange and a contraction angle outlet flange 908, respectively. The fixed connection of the reforming core 5 and the reformer outer barrel 8 is sealed by copper pads. It will be appreciated that the structure of the reforming core 5 described above adopts a detachable manner, so that catalysts (particulate catalysts, structural catalysts, etc.) with different structures, shapes and types can be filled in the reforming tube bundles 903, and compatibility of the reforming core 5 for different catalysts is increased; in addition, the sliding roller 902 is mounted on the expansion angle 901 of the reforming core 5, so that the reforming core 5 can be conveniently mounted in the reformer outer tub 8.
Referring to fig. 3, fig. 3 is a flow chart of a method for reforming and recycling a multi-fuel gas engine according to an embodiment of the present application, where the method for reforming and recycling a multi-fuel gas engine may be configured in a terminal device, and the terminal device may include any one or more of a computer, a personal digital assistant (Personal Digital Assistant, PDA), an intelligent voice interaction device, and an intelligent power device, which is not limited in this application. The method is mainly used for reforming and recycling based on the reforming and recycling system in the foregoing embodiment, and referring to fig. 3, the reforming and recycling method of the multi-fuel gas engine includes, but is not limited to:
step 110, detecting the load of the engine when the engine is in a starting state;
and 120, when the load is greater than a first preset threshold value, introducing fuel gas into the reforming core, opening the exhaust gas recirculation valve, and starting the plasma generator, the reforming core and the intercooler.
In the embodiment of the application, when the engine is at a lower working load, the demand for hydrogen is not high, and the working process of reforming hydrogen production can not be started first. When the operating load is high, in-line reforming of the hydrogen loading is required to improve the combustion characteristics of the fuel in the engine. In this regard, a load threshold may be preset, and recorded as a first preset threshold, for example, may be 25% of the highest load of the engine, and if the current load of the engine is greater than the first preset threshold, fuel gas may be introduced into the reforming core, the exhaust gas recirculation valve may be opened, and the plasma generator, the reforming core and the intercooler may be started, so as to perform ammonia reforming hydrogen production, so as to meet the higher workload demand. It will be appreciated, of course, that when the power of the engine is low, indicating that the engine is likely to be in progress for a shutdown, the various devices described above may be selectively shut down.
In some embodiments, the method further comprises:
detecting the temperature of the gas discharged from the gas outlet end of the reforming core;
and when the gas temperature is greater than a second preset threshold value, increasing the flow of cooling water flowing into the intercooler.
In the embodiment of the application, in the process of cooling the hydrogen-rich reformed gas by the intercooler, the gas temperature discharged from the gas outlet end of the reforming core can be detected. When the gas temperature is higher, the requirement on the cooling power of the intercooler is higher, and the opening degree of the related stop valve can be adjusted at the moment, so that the supply amount of cooling water of the intercooler is increased, and the cooling efficiency of the intercooler is provided.
Referring to fig. 4, the embodiment of the application further discloses a computer device, including:
at least one processor 301;
at least one memory 302 for storing at least one program;
the at least one program, when executed by the at least one processor 301, causes the at least one processor 301 to implement the reforming and recycling method embodiment of the multi-fuel gas engine as shown in fig. 3.
It will be appreciated that the embodiments of the reforming and recirculating method of the multi-fuel gas engine shown in fig. 3 are applicable to the embodiments of the present computer apparatus, and the functions of the embodiments of the present computer apparatus are the same as those of the embodiments of the reforming and recirculating method of the multi-fuel gas engine shown in fig. 3, and the advantages achieved are the same as those achieved by the embodiments of the reforming and recirculating method of the multi-fuel gas engine shown in fig. 3.
The present embodiments also disclose a computer readable storage medium having stored therein a processor executable program which when executed by a processor is for implementing a reforming and recycling method embodiment of a multi-fuel gas engine as shown in fig. 3.
It will be appreciated that the embodiments of the method of reforming and recirculating a multi-fuel gas engine as shown in fig. 3 are applicable to the embodiments of the computer-readable storage medium which perform the same functions and achieve the same advantages as those achieved by the embodiments of the method of reforming and recirculating a multi-fuel gas engine as shown in fig. 3.
In some alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flowcharts of this application are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed, and in which sub-operations described as part of a larger operation are performed independently.
Furthermore, while the present application is described in the context of functional modules, it should be appreciated that, unless otherwise indicated, one or more of the functions and/or features may be integrated in a single physical device and/or software module or one or more of the functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary to an understanding of the present application. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be apparent to those skilled in the art from consideration of their attributes, functions and internal relationships. Thus, those of ordinary skill in the art will be able to implement the present application as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative and are not intended to be limiting upon the scope of the application, which is to be defined by the appended claims and their full scope of equivalents.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium may even be paper or other suitable medium upon which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the foregoing description of the present specification, descriptions of the terms "one embodiment/example", "another embodiment/example", "certain embodiments/examples", and the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
While the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the embodiments, and one skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are intended to be included in the scope of the present invention as defined by the appended claims
In the description of the present specification, reference to the terms "one embodiment," "another embodiment," or "certain embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. A reforming and recycling system of a multi-fuel gas engine, comprising:
the device comprises a fuel configuration device, an exhaust Y-shaped pipe, a reforming core, a reformer outer cylinder, an exhaust outlet pipe, an exhaust inlet pipe, an exhaust recycling valve and a butterfly valve;
the fuel configuration device comprises a plurality of fuel gas storage devices and stop valves corresponding to the gas storage devices, the fuel configuration device is connected to the air inlet end of the multi-fuel gas engine, and the fuel configuration device is also connected to the air inlet end of the reforming core; the exhaust Y-shaped pipe comprises an air inlet end, a reforming end and an exhaust emission end, the air inlet end of the exhaust Y-shaped pipe is connected with the exhaust outlet end of the multi-fuel gas engine, the reforming end of the exhaust Y-shaped pipe is connected with the air inlet end of the reforming core through the exhaust recycling valve, and the exhaust emission end of the exhaust Y-shaped pipe is connected with the first end of the outer cylinder of the reformer through the butterfly valve and the exhaust inlet pipe; the reforming core is arranged in the reformer outer barrel, and a second end of the reformer outer barrel, which is far away from the first end, is connected with the waste gas outlet pipe; the air outlet end of the reforming core is connected with the air inlet end of the multi-fuel gas engine;
the reforming core comprises an expansion angle, a sliding roller, a reforming tube bundle, a connecting disc, a wire mesh and a contraction angle;
the expansion angle is welded with the first end of the reforming tube bundle, the connecting disc is welded with the second end of the reforming tube bundle, holes corresponding to the second end of the reforming tube bundle are formed in the connecting disc, and the reforming tube bundle is used for filling a catalyst; the shrinkage angle is fixedly connected with the connecting disc, and the wire mesh is arranged between the shrinkage angle and the connecting disc; the sliding roller is arranged on the expansion angle, and the reforming core can be detachably connected with the reformer outer barrel through the sliding roller;
the end where the expansion angle is located is the air inlet end of the reforming core, and the end where the contraction angle is located is the air outlet end of the reforming core.
2. The reforming and recycling system of a multi-fuel gas engine as set forth in claim 1, wherein the fuel allocation means comprises at least one of methane storage means, ethane storage means, ethanol storage means, or ammonia storage means.
3. The reforming and recycling system of a multi-fuel gas engine as set forth in claim 1, wherein the reforming and recycling system of the multi-fuel gas engine further comprises a plasma generator;
the plasma generator is disposed at an air inlet end of the reforming core.
4. A reforming and recycling system of a multi-fuel gas engine as set forth in claim 3, further comprising an intercooler, a cooling water source, a water storage tank, and a circulating water tower;
the air outlet end of the reforming core is connected with the air inlet end of the multi-fuel gas engine, and the air inlet end of the reforming core is specifically as follows:
the air outlet end of the reforming core is connected with the intercooler, cooling water of the intercooler is provided by the cooling water source, the cooling water outlet of the intercooler is connected with the circulating water tower, and the air outlet end of the intercooler is connected with the air inlet end of the multi-fuel gas engine through the water storage tank.
5. The reforming and recycling system of a multi-fuel gas engine as set forth in claim 4, wherein the reforming and recycling system of the multi-fuel gas engine further comprises entrainment means;
the entrainment device is disposed at an intake end of the multi-fuel gas engine.
6. A reforming and recycling method of a multi-fuel gas engine for controlling the reforming and recycling system according to claim 4, comprising the steps of:
detecting a load of the engine when the engine is in a started state;
and when the load is greater than a first preset threshold value, introducing fuel gas into the reforming core, opening the exhaust gas recirculation valve, and starting the plasma generator, the reforming core and the intercooler.
7. The method of reforming and recycling a multi-fuel gas engine as set forth in claim 6, further comprising:
detecting the temperature of the gas discharged from the gas outlet end of the reforming core;
and when the gas temperature is greater than a second preset threshold value, increasing the flow of cooling water flowing into the intercooler.
8. A computer device, comprising:
at least one processor;
at least one memory for storing at least one program;
the at least one program, when executed by the at least one processor, causes the at least one processor to implement the method of reforming and recycling a multi-fuel gas engine as set forth in any one of claims 6-7.
9. A computer-readable storage medium having stored therein a program executable by a processor, characterized in that: the processor executable program when executed by a processor is for implementing a method of reforming and recycling a multi-fuel gas engine as defined in any one of claims 6-7.
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