CN212318179U - Ignition type methanol engine combustion system - Google Patents
Ignition type methanol engine combustion system Download PDFInfo
- Publication number
- CN212318179U CN212318179U CN202020725336.5U CN202020725336U CN212318179U CN 212318179 U CN212318179 U CN 212318179U CN 202020725336 U CN202020725336 U CN 202020725336U CN 212318179 U CN212318179 U CN 212318179U
- Authority
- CN
- China
- Prior art keywords
- methanol
- dimethyl ether
- fuel
- pipeline
- ignition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 1004
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 48
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims abstract description 252
- 239000000446 fuel Substances 0.000 claims abstract description 137
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 88
- 238000003860 storage Methods 0.000 claims description 71
- 230000001276 controlling effect Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000010892 electric spark Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000003595 mist Substances 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 83
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The utility model provides a spark-ignition methanol engine combustion system, including methanol engine and methyl alcohol memory, still include for the blender provide the fuel feeding system of gasified methyl alcohol fuel, do the ignition agent feeding system of the dimethyl ether ignition agent that the blender provided and with the air of gasified methyl alcohol fuel, dimethyl ether ignition agent and intake pipe input mix into the mist according to the proportion, pass through in the intake manifold input methanol engine cylinder with the mist again. The utility model provides a spark-ignition formula methanol engine combustion system, this ignition agent supply system can provide dimethyl ether ignition agent for the blender at once when methanol engine starts, provide the dimethyl ether ignition agent of electric spark in with the mist through the spark plug and light and form the flame that ignites, recycle and ignite the remaining mist of flame ignition, can effectively solve the problem of methanol engine cold start difficulty.
Description
Technical Field
The utility model belongs to the technical field of methanol engine technique and specifically relates to a firing formula methanol engine combustion system is related to.
Background
With the continuous improvement of living standard of people, the environmental protection consciousness is gradually increased. With the increasing shortage of petroleum resources on the earth, various new energy automobiles are also generated and are continuously matured with the technological development. Methanol is a substance synthesized from coal, natural gas, wood, garbage and other raw materials, and is considered as a first clean fuel for replacing petroleum fuels. Methanol has received widespread attention from people because it has a wide methanol supply chain in china, has the advantages of low price and low pollution discharge generated by combustion on engines. However, the methanol engine is difficult to start at low temperature, which is one of the main reasons why the methanol engine cannot be widely popularized in a large scale at present, and is one of the problems that the methanol engine is urgently needed to overcome at present.
Researchers have made a lot of researches on dual-fuel combustion, such as adding methanol into diesel oil or gasoline and igniting methanol by an ignition agent, and the application of methanol engines in the automobile industry is greatly limited due to the complex combustion system, high cost, difficult control, poor reliability, easy occurrence of some series of side effects and the like of the methanol engines. For example, in a methanol engine system with hydrogen production from methanol as a pilot fuel provided in publication No. CN110273790A, a hydrogen storage container is added in the system to solve the problem of cold start of the methanol engine. However, since hydrogen is a highly combustible and explosive substance, it is mixed with air to form an explosive mixture, and it can explode when it is heated or exposed to fire. In the patent, hydrogen is used as an ignition agent of the methanol engine, so that the practicability is not high, the potential safety hazard is very large, and the large-scale production and application in the automobile industry cannot be realized.
In the existing methanol engine, the methanol fuel must be refined into small particles through a nozzle and enter a cylinder to be ignited by a pilot flame in the cylinder, so that the problem of insufficient combustion of the methanol fuel exists.
Disclosure of Invention
The utility model aims to solve current ignition formula methanol engine combustion system and start the difficulty under low temperature state, and add other fuel and complicated as the methanol engine combustion system of ignition agent, during cost is too high, the reliability is poor and the potential safety hazard is very big and methanol fuel must get into the cylinder through the nozzle to insufficient shortcoming of methanol fuel burning provides an ignition formula methanol engine combustion system.
The utility model provides a technical scheme that its technical problem adopted is: a spark-ignition methanol engine combustion system, includes methanol engine and methyl alcohol storage ware, the methyl alcohol engine includes the casing, sets up intake manifold, the exhaust manifold on the casing and sets up at least one cylinder assembly in the casing, the cylinder assembly includes the cylinder body and sets up the spark plug on the cylinder body, still includes:
a fuel supply system in communication with the methanol reservoir and providing vaporized methanol fuel to the mixer, comprising a first conduit in communication with the methanol reservoir, an evaporator to vaporize the methanol fuel in the first conduit, and a fuel conduit to communicate the evaporator with the mixer;
the ignition agent supply system is communicated with the methanol storage and provides the dimethyl ether ignition agent for the mixer, and comprises a second pipeline communicated with the methanol storage, a methanol cracker for converting methanol fuel in the second pipeline into the dimethyl ether ignition agent, a dimethyl ether storage in which the dimethyl ether ignition agent is prestored and a ignition agent pipeline for communicating the dimethyl ether storage with the mixer, wherein the methanol cracker is communicated with the dimethyl ether cracker;
the mixer mixes the gasified methanol fuel, the dimethyl ether ignition agent and air input by the air inlet pipe into mixed gas according to a proportion, and inputs the mixed gas into the methanol engine cylinder through the air inlet manifold, and the mixer comprises a mixing chamber, a first air inlet which is arranged on the mixing chamber and communicated with the fuel pipeline, a second air inlet which is communicated with the ignition agent pipeline, a third air inlet which is communicated with the air inlet pipe and an exhaust port which is communicated with the air inlet manifold.
Further, the volume of the dimethyl ether ignition aid in the mixed gas of the mixer accounts for 2-40% of the volume of the mixed gas.
Further, the methanol storage device comprises a storage tank for storing methanol fuel and a methanol output pipeline for communicating the storage tank with the first pipeline and the second pipeline, and a low-pressure pump for increasing the output pressure of the methanol fuel in the methanol output pipeline is arranged on the methanol output pipeline.
Specifically, a methanol heater for heating the methanol fuel in the methanol output pipeline in the first stage is further arranged on the methanol output pipeline.
Specifically, the methanol engine is communicated with the methanol heater through the exhaust manifold, the exhaust manifold is provided with a turbine, and the methanol heater is provided with an exhaust pipe.
Specifically, the air inlet pipe is provided with an air compressor, and the air compressor is coaxially connected with the turbine.
Furthermore, a first flow control valve for controlling the output quantity of the dimethyl ether is arranged on the ignition agent pipeline, and a second flow control valve for controlling the output quantity of the methanol fuel is arranged on the second pipeline.
Further, the methanol cracker is communicated with the dimethyl ether storage through a third pipeline, and a first pressure control valve for regulating and controlling the opening and closing of the third pipeline is arranged on the third pipeline.
Furthermore, a methanol fuel flow valve used for controlling the flow of the gasified methanol fuel entering the mixer is arranged on the fuel pipeline.
The utility model provides a firing formula methanol engine combustion system's beneficial effect lies in: the methanol engine is provided with a fuel supply system and an ignition agent supply system, the fuel supply system can immediately provide gasified methanol fuel for the mixer when the methanol engine is started, the ignition agent supply system can immediately provide dimethyl ether ignition agent for the mixer when the methanol engine is started, the gasified methanol fuel, the dimethyl ether ignition agent and air are mixed according to a proportion by the mixer and then are input into the cylinder assembly, then the dimethyl ether ignition agent in the electric spark mixed gas is ignited by a spark plug in the cylinder assembly to form an ignition flame, and then the rest mixed gas is ignited by the ignition flame, so that the problem of difficult cold start of the methanol engine can be effectively solved; the fuel supply system provides the gasified methanol fuel for the methanol engine, can replace a nozzle on the traditional cylinder to play a role in granulating the methanol fuel, and ensures the combustion effect and the utilization rate of the methanol fuel in the cylinder; the ignition agent supply system can participate in the whole cold start process of the methanol engine, and can greatly shorten the cold start time of the methanol engine; the methanol fuel cracking device is also arranged, so that the dimethyl ether ignition agent serving as the ignition agent can be generated by catalyzing the methanol fuel in the fuel supply system in the operation process of the methanol engine and stored in the dimethyl ether storage device, and sufficient ignition agent can be provided for the combustion in the methanol engine; the utility model discloses in adopt dimethyl ether ignition agent as the ignition agent more use hydrogen safe and reliable and stable more, be applicable to extensive popularization and use in the automotive industry.
Drawings
Fig. 1 is a working schematic diagram of a combustion system of an ignition type methanol engine provided by the utility model.
In the figure: 100-ignition type methanol engine combustion system; 10-methanol engine, 11-housing, 12-cylinder assembly, 121-cylinder block, 122-spark plug, 13-intake manifold, 14-exhaust manifold;
20-a methanol storage, 21-a storage tank, 22-a methanol output pipeline, 23-a low-pressure pump, 24-a methanol heater and 25-an exhaust pipe;
30-fuel supply system, 31-first conduit, 32-evaporator, 33-fuel conduit, 34-methanol fuel flow valve;
40-a detonator supply system, 41-a second pipeline, 42-a methanol cracker, 421-a secondary heater, 43-a dimethyl ether storage, 44-a detonator pipeline, 45-a first flow control valve, 46-a first pressure control valve, 47-a second flow control valve and 48-a third pipeline;
50-mixer, 51-first inlet, 52-second inlet, 53-third inlet, 54-exhaust;
60-air inlet pipe, 61-turbine, 62-compressor and 63-shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a combustion system 100 of a spark-ignition methanol engine is provided. The ignition type methanol engine combustion system 100 takes methanol fuel as basic fuel, takes dimethyl ether as an ignition agent, heats and gasifies the methanol fuel in the conveying process of the methanol fuel, then mixes the dimethyl ether with the ignition agent and air in the mixer 50 to form mixed gas, ignites the dimethyl ether ignition agent in the mixed gas by electric sparks provided by a spark plug 122 in the methanol engine 10 to form ignition flame, and ignites and combusts the rest mixed gas by the ignition flame, so that the piston in the methanol engine 10 is pushed to perform reverse action to realize the engine driving action. The utility model provides an among the ignition formula methanol engine combustion system 100, this methanol engine 10 normal operating process, the dimethyl ether gas that produces the methanol fuel catalysis in the methanol storage 20 as the detonator is stored and is provided sufficient dimethyl ether detonator in dimethyl ether storage 43 for the next start-up, utilizes the dimethyl ether detonator as the detonator more safe and reliable and stable of hydrogen, is applicable to the extensive popularization and use among the automotive industry.
Specifically, as shown in fig. 1, the ignition type methanol engine combustion system 100 includes a methanol engine 10, a methanol storage 20, a fuel supply system 30 which is communicated with the methanol storage 20 and provides gasified methanol fuel for a mixer 50, a pilot fuel supply system 40 which is communicated with the methanol storage 20 and provides dimethyl ether pilot fuel for the mixer 50, and air which is input by the gasified methanol fuel, the dimethyl ether pilot fuel and an air inlet pipe 60 is mixed into mixed gas in proportion in the mixer 50, and the mixed gas is input into a cylinder 12 of the methanol engine 10 through an air inlet manifold 13. In the methanol engine 10, the dimethyl ether ignition agent in the mixed gas provided by the mixer 50 is ignited by the electric spark provided by the spark plug 122 to form pilot flame, and then the residual gas in the mixed gas formed by the mixer 50 is combusted by the pilot flame to complete the normal combustion process in the methanol engine 10, so that the technical problem of difficult starting in the normal cold starting process of the methanol engine 10 can be solved, the normal combustion of the methanol fuel in the cold starting process can be ensured, the utilization rate of the methanol fuel is greatly improved, and the time required by the cold starting of the methanol engine 10 is greatly shortened. In the ignition agent supply system 40, the methanol storage 20 provides basic methanol fuel, and the methanol fuel is dehydrated under the action of high temperature and catalyst to prepare the dimethyl ether ignition agent which can be ignited by the spark plug 122 of the methanol engine 10, so that sufficient dimethyl ether gas is always kept in the cold start process of the methanol engine 10 in the long-time repeated use process of the methanol engine 10.
Further, in the ignition type methanol engine combustion system 100 provided by the present invention, the methanol engine 10 includes a housing 11, an intake manifold 13 and an exhaust manifold 14 disposed on the housing 11, and at least one cylinder assembly 12 disposed in the housing 11. In the present embodiment, six cylinder assemblies 12 are disposed in the housing 11, and the fuel supply system 30 and the ignition agent supply system 40 communicate the methanol engine 10 with the methanol storage 20, so as to ensure that sufficient fuel can be supplied to the methanol engine 10 at all times. The cylinder assembly 12 provided in the housing 11 includes a cylinder body 121 and an ignition plug 122 provided on the cylinder body 121. The cylinder assembly 12 communicates with the mixer 50 through the intake manifold 13 to effect the supply of fuel and a pilot. In the methanol engine 10, a nozzle is not required to be separately arranged in the cylinder assembly 12 for injecting the methanol fuel, but the methanol fuel is directly gasified by the fuel supply system 30, mixed with the ignition agent and the air, and then input into the cylinder assembly 12 to realize the combustion process of the methanol fuel. Nozzle costs may be saved compared to conventional methanol engines 10.
Further, the present invention provides a methanol storage 20 comprising a storage tank 21 for storing methanol fuel and a methanol output pipeline 22 communicating the storage tank 21 with the fuel supply system 30 and the ignition agent supply system 40, wherein the methanol output pipeline 22 is respectively communicated with the first pipeline 31 in the fuel supply system 30 and the second pipeline 41 in the ignition agent supply system 40. As shown in fig. 1, in the present embodiment, the methanol storage 20 is provided with a low-pressure pump 23 for increasing the output pressure of the methanol fuel in the methanol output pipe 22 on the methanol output pipe 22. The low pressure pump 23 is arranged so that the methanol fuel from the storage tank 21 can be delivered to the mixer 50 at a pressure maintained in each of the first and second pipes 31 and 41, respectively, for mixing. And the low-pressure pump 23 is arranged to provide delivery power for the methanol fuel in the pipeline of the fuel supply system 30, ensure that the methanol fuel is finally delivered to the methanol engine 10 for effective combustion, and also provide delivery power for the methanol fuel in the pipeline of the ignition agent supply system 40, so that a part of the methanol fuel can be converted into ignition agent for storage and use.
Further, a methanol heater 24 for heating the methanol fuel in the methanol output pipeline 22 in a first stage is arranged on the methanol output pipeline 22. The methanol heater 24 is the first stage heater in the overall spark-ignition methanol engine combustion system 100. The methanol heater 24 can raise the temperature of the methanol fuel in the two sets of pipelines of the fuel supply system 30 and the ignition agent supply system 40 as soon as possible, so as to provide for preliminary heating of the methanol fuel to be gasified in the fuel supply system 30 and preparation for heating catalytic dehydration of the methanol fuel to be converted into the dimethyl ether ignition agent in the subsequent methanol cracker 42. The temperature of the methanol fuel heated by the first stage of the methanol heater 24 is increased, so that the time for vaporizing the methanol fuel in the fuel supply system 30 can be shortened, and the utilization rate of the methanol fuel in the methanol cracker 42 can be improved. The methanol heater 24 provided in the methanol delivery pipe 22 may be heated by circulating exhaust gas generated by the methanol engine 10, or may be configured to heat the methanol fuel in the methanol delivery pipe 22 by other means such as electric heating. Most of the heated methanol fuel enters the evaporator 32 through the first pipeline 31 for gasification, and the small part of the heated methanol fuel enters the methanol cracker 42 through the second pipeline 41 for cracking under the action of the catalyst to generate dimethyl ether gas.
Further, the fuel supply system 30 provided outside the methanol engine 10 includes a first pipe 31 communicating with the methanol storage 20, an evaporator 32 vaporizing the methanol fuel in the first pipe 31, and a fuel pipe 33 communicating the evaporator 32 with the mixer 50. The fuel supply system 30 delivers most of the methanol fuel in the methanol storage 20 to the evaporator 32 through the first pipe 31 to be vaporized. The evaporator 32 is provided to increase the temperature of the methanol fuel so that the methanol fuel can be vaporized, and the vaporized methanol fuel is introduced into the mixer 50 through the fuel pipe 33.
Further, the ignition agent supply system 40 disposed outside the methanol engine 10 includes a second pipe 41 communicating with the methanol storage 20, a methanol cracker 42 converting the methanol fuel in the second pipe 41 into the dimethyl ether ignition agent, a dimethyl ether storage 43 in which the dimethyl ether gas is pre-stored communicating with the methanol cracker 42, and an ignition agent pipe 44 communicating the dimethyl ether storage 43 with the mixer 50. The dimethyl ether ignition agent stored in the dimethyl ether storage 43 in the ignition agent supply system 40 can supply dimethyl ether as an ignition agent into the mixer 50 immediately at the start of the methanol engine 10. The ignition agent supply system 40 participates in the whole cold start process of the methanol engine 10, solves the problem of difficulty in cold start of the methanol engine 10, can greatly shorten the cold start time of the methanol engine 10, and improves the cold start efficiency of the methanol engine 10.
The utility model provides an in ignition agent supply system 40, the dimethyl ether gas that prestores in this dimethyl ether memory 43 is in order to guarantee that methanol engine 10 can provide the required sufficient dimethyl ether gas as the ignition agent use as cold start for the gas mixture of blender 50 many times when first using. Therefore, the dimethyl ether storage 43 needs to ensure a certain capacity, so that all the amount of the dimethyl ether gas in the dimethyl ether storage 43 can be used for igniting the cold-start methanol engine 10 for many times.
Specifically, the capacity of the dimethyl ether gas stored in the dimethyl ether storage 43 is 10 times to 20 times or even more than the amount of the dimethyl ether gas required for a single cold start of the methanol engine 10. During the normal operation of the methanol engine 10, the dimethyl ether gas in the dimethyl ether storage 43 can continuously participate in the operation of the methanol engine 10, or the dimethyl ether ignition agent is stopped after the methanol engine 10 operates stably. However, in order to ensure that sufficient dimethyl ether ignition agent can be used to generate a pilot flame each time the methanol engine 10 is ignited, it is necessary to be able to generate dimethyl ether gas to replenish the dimethyl ether storage 43 during normal operation of the methanol engine 10.
Further, the present invention provides a spark ignition type methanol engine combustion system 100, which further comprises a mixer 50, wherein the mixer 50 comprises a mixing chamber, a first air inlet 51 disposed on the mixing chamber and communicated with the fuel pipeline 33, a second air inlet 52 communicated with the ignition agent pipeline 44, a third air inlet 53 communicated with the air inlet pipe 60, and an air outlet 54 communicated with the air inlet manifold 13. The mixer 50 inputs the gasified methanol fuel provided by the fuel supply system 30 into the mixing chamber of the mixer 50 through the first intake port 51, inputs the dimethyl ether ignition agent provided by the ignition agent supply system 40 into the mixing chamber of the mixer 50 through the second intake port 52, inputs the outside air into the mixing chamber of the mixer 50 through the third intake port 53, mixes the input various gases in proportion into a mixed gas in the mixing chamber of the mixer 50, inputs the mixed gas into the intake manifold 13 through the exhaust port 54, and finally inputs the mixed gas into the cylinder assembly 12 of the methanol engine 10 through the intake manifold 13, thereby realizing the combustion process in the methanol engine 10 through the mixed gas.
Specifically, the mixing chamber in the mixer 50 provides a gas mixing space for mixing the gasified methanol fuel input from the fuel supply system 30 with air and the dimethyl ether ignition agent input from the ignition agent supply system 40 to form a mixed gas. Wherein, the volume of the dimethyl ether ignition agent in the mixed gas formed in the mixing chamber of the mixer 50 is required to be ensured to account for 2-40% of the volume of the whole mixed gas, so that the spark plug 122 inside the cylinder assembly 12 in the methanol engine 10 can ignite flame, thereby ensuring the full combustion of the mixed gas in the cylinder assembly 12. If the volume of the dimethyl ether ignition agent is less than 2% of the volume of the mixed gas, the flame cannot be ignited by the spark plug in the methanol engine 10, and the methanol engine 10 cannot be normally cold started. If the volume of the dimethyl ether ignition agent accounts for more than 40% of the volume of the mixed gas, it cannot be ensured that the ignition agent supply system 40 can always provide sufficient dimethyl ether ignition agent for use, and the sufficient use of the dimethyl ether ignition agent required in the normal cold start process of the subsequent methanol engine 10 will be influenced. During the cold start of the methanol engine 10, because the temperature in the cylinder assembly 12 is low, the demand of the dimethyl ether ignition aid in the mixed gas in the cylinder assembly 12 is large, and the proportion of the volume of the dimethyl ether ignition aid in the volume of the mixed gas is high. After the methanol engine 10 normally operates, the demand of the dimethyl ether gas in the mixed gas in the cylinder assembly 12 is reduced, the combustion-supporting amount of the dimethyl ether gas as the ignition agent can be adjusted according to actual needs, and even when the methanol engine 10 normally operates, the input of the dimethyl ether ignition agent can be closed. The utility model provides an in ignition formula methanol engine combustion system 100, this dimethyl ether memory 43 is used for storing dimethyl ether gas and is used when methanol engine 10 cold start and normal operating, guarantees when initial condition starts methanol engine 10, and when methyl alcohol cracker 42 did not produce dimethyl ether gas, can be immediately to the inside dimethyl ether gas that provides sufficient volume and sufficient concentration of blender 50. The dimethyl ether gas in the dimethyl ether storage 43 in the ignition agent supply system 40 can immediately provide the dimethyl ether gas as the ignition agent for the mixer 50 when the methanol engine 10 is in cold start, and forms mixed gas in the mixer 50, so that the technical problem that the methanol engine 10 is difficult to cold start and is difficult to combust is solved, the cold start time of the methanol engine 10 can be greatly shortened, and the cold start efficiency of the methanol engine 10 is improved; moreover, the ignition agent supply system 40 provides sufficient ignition agent for the cylinder assembly 12 inside the methanol engine 10, and can also improve the combustion efficiency of the methanol fuel inside the methanol engine 10 and improve the utilization rate of the methanol fuel.
Further, the utility model provides a still be provided with in this fuel supply system 40 in ignition formula methanol engine combustion system 100 and be provided with the methanol cracker 42 for dimethyl ether memory 43 supply ignition agent. This methanol cracker 42 turns into dimethyl ether gas, promptly the ignition agent in the utility model with some in the methanol fuel that provides in the methanol storage 20. The methanol cracker 42 can realize self-production of dimethyl ether gas in the normal working process of the whole ignition type methanol engine combustion system 100, and ensure that the dimethyl ether gas ignition agent is generated by the catalysis of methanol fuel in the normal running process of the methanol engine 10, so that the dimethyl ether gas ignition agent is used for cold start of the methanol engine 10 and is ignited by the spark plug 122 in the cylinder assembly 12 in the normal running process. The methanol cracker 42 is communicated with the methanol storage 20 through a second pipeline 41 and communicated with the dimethyl ether storage 43 through a third pipeline 48. One end of the methanol cracker 42 is communicated with the methanol storage 20 to obtain raw material methanol for generating dimethyl ether gas from the methanol storage 20, and the other end is communicated with the dimethyl ether storage 43 to convey the dimethyl ether gas generated in the methanol cracker 42 to the dimethyl ether storage 43 for storage.
The methanol fuel heated by the methanol heater 24 in the methanol storage 20 enters the methanol cracker 42 through the second pipeline 41, and is cracked to generate dimethyl ether gas under the action of the catalyst, and the dimethyl ether gas generated by cracking is input into the dimethyl ether storage 43 through the third pipeline 48 by the methanol cracker 42 for storage, so that sufficient and stable dimethyl ether gas is provided as a combustion initiator for the normal operation of the methanol engine 10.
Specifically, the utility model provides a be provided with secondary heater 421 in the methanol cracker 42. The secondary heater 421 in the methanol cracker 42 further heats the methanol fuel that has been primarily heated by the methanol heater 24. On one hand, the working temperature in the methanol cracker 42 can be ensured to meet the temperature required by the methanol conversion, and on the other hand, the efficiency of converting the methanol fuel in the methanol cracker 42 into the dimethyl ether ignition agent can be improved, thereby ensuring that the methanol fuel can be subjected to an efficient and effective conversion process in the methanol cracker 42.
Specifically, a flow valve and a pressure valve are respectively arranged on the second pipeline 41 and the third pipeline 48 on two sides of the methanol cracker 42 to control the amount of methanol fuel entering the methanol cracker 42 and the opening and closing of the third pipeline 48. The second pipe 41 is provided with a first flow rate control valve 45 for controlling the flow rate of the methanol fuel in the second pipe 41. The amount of methanol fuel from the methanol reservoir 20 via the second line 41 into the methanol cracker 42 can be regulated by means of the first flow control valve 45. When the dimethyl ether gas in the methanol cracker 42 is sufficiently saturated, the input of the methanol fuel may be shut off by the first flow control valve 45. And the third pipe 48 is provided with a first pressure control valve 46 for controlling the output of dimethyl ether. The dimethyl ether gas dehydrated and catalyzed by the methanol cracker 42 enters the dimethyl ether storage 43 to be stored through the regulation and control of the first pressure control valve 46, when the pressure of the dimethyl ether gas in the dimethyl ether storage 43 is less than the preset pressure value on the first pressure control valve 46, the dimethyl ether gas in the dimethyl ether storage 43 is consumed to the extent that the dimethyl ether gas is required to be supplemented, at the moment, the first pressure control valve 46 is gradually opened along with the reduction of the internal pressure of the dimethyl ether storage 43, the dimethyl ether gas in the third pipeline 48 and the methanol cracker 42 is input into the dimethyl ether storage 43 for storage, the quantity of the dimethyl ether gas stored in the dimethyl ether storage 43 is ensured to meet the requirement of the normal operation of the methanol engine 10, the dimethyl ether gas can be replenished to the dimethyl ether storage 43 at any time by regulating the first pressure control valve 46. When the dimethyl ether gas in the dimethyl ether storage 43 is full or reaches the preset pressure value of the first pressure control valve 46, the first pressure control valve 46 closes the gas outlet channel 42, the dimethyl ether gas in the methanol cracker 42 is gradually saturated along with the continuous supplement of the methanol fuel, and at the moment, the first flow control valve 45 is closed, so that the methanol storage 20 stops providing methanol to the methanol cracker 42, and the methanol cracker 42 stops working.
Specifically, as shown in fig. 1, the dimethyl ether storage 43 and the mixer 50 in the ignition agent supply system 40 are communicated through an ignition agent pipeline 44, and a second flow control valve 47 for controlling the output quantity of the dimethyl ether is arranged on the ignition agent pipeline 44. The amount of dimethyl ether gas entering the mixer 50 is controlled by the second flow control valve 47. When the internal temperature of the methanol engine 10 meets the combustion temperature of the methanol fuel, the input amount of the dimethyl ether gas into the mixer 50 is adjusted and reduced by the second flow control valve 47, so as to meet the requirement of the ignition agent required by the normal operation in the cylinder assembly 12 inside the methanol engine 10. When the temperature in the methanol engine 10 is lowered or the methanol engine 10 needs to be started again, the flow rate of the dimethyl ether gas entering the mixer 50 is adjusted by the second flow control valve 47, so as to increase the concentration of the dimethyl ether gas in the mixer 50.
Further, in the fuel supply system 30 provided by the present invention, a methanol fuel flow valve 34 for controlling the flow of the gasified methanol fuel into the mixer 50 is disposed on the fuel pipeline 33. The amount of vaporized methanol fuel in fuel line 33 is regulated by the methanol fuel flow valve 34 into mixer 50.
Further, as shown in fig. 1, the present invention provides a methanol engine 10 in a combustion system 100 of a spark ignition type methanol engine, which is communicated with a methanol heater 24 through an exhaust manifold 16, wherein a turbine 61 is disposed on the exhaust manifold 16. The turbine 61 is additionally arranged in the exhaust system of the methanol engine 10, the compressor 62 is driven by the turbine 61 to pressurize, the exhaust gas discharged from the exhaust manifold 16 enters the methanol heater 24 through the exhaust manifold 16, the exhaust gas of the methanol engine 10 can be fully utilized to heat the methanol heater 24, and the high-temperature heat of the exhaust gas discharged from the methanol engine 10 is converted into useful work to be used as methanol fuel for first-stage heating. An exhaust pipe 25 is provided on the other side of the methanol heater 24, and the exhaust gas passing through the methanol heater 24 is discharged from the exhaust pipe 25 through the exhaust pipe 25, thereby completing the exhaust gas reuse and re-discharge of the methanol engine 10.
Further, as shown in fig. 1, in a combustion system 100 of a spark-ignition methanol engine provided by the present invention, a compressor 62 is disposed on an intake pipe 60, and the compressor 62 and a turbine 61 are coaxially connected. The gas compressor 62 additionally arranged in the gas inlet pipe 60 is connected with the turbine 61 through a shaft 63, so that the exhaust gas discharged by the methanol engine 10 drives the turbine 61 to rotate, the turbine 61 drives the gas compressor 62 connected with the shaft 63 to boost, the air inlet pressure of the air at the mixer 50 can be greatly improved, and the air inlet efficiency of the methanol engine 10 is further improved.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A spark-ignition methanol engine combustion system, includes methanol engine and methyl alcohol storage ware, the methyl alcohol engine includes the casing, sets up air intake manifold, the exhaust manifold on the casing and sets up at least one cylinder assembly in the casing, the cylinder assembly includes the cylinder body and sets up the spark plug on the cylinder body, its characterized in that still includes:
a fuel supply system in communication with the methanol reservoir and providing vaporized methanol fuel to the mixer, comprising a first conduit in communication with the methanol reservoir, an evaporator to vaporize the methanol fuel in the first conduit, and a fuel conduit to communicate the evaporator with the mixer;
the ignition agent supply system is communicated with the methanol storage and provides dimethyl ether ignition agent for the mixer, and comprises a second pipeline communicated with the methanol storage, a methanol cracker for converting methanol fuel in the second pipeline into the dimethyl ether ignition agent, a dimethyl ether storage in which the dimethyl ether ignition agent is prestored and a ignition agent pipeline for communicating the dimethyl ether storage with the mixer, wherein the methanol cracker is communicated with the dimethyl ether storage;
the mixer mixes the gasified methanol fuel, the dimethyl ether ignition agent and air input by the air inlet pipe into mixed gas according to a proportion, and inputs the mixed gas into the methanol engine cylinder through the air inlet manifold, and the mixer comprises a mixing chamber, a first air inlet which is arranged on the mixing chamber and communicated with the fuel pipeline, a second air inlet which is communicated with the ignition agent pipeline, a third air inlet which is communicated with the air inlet pipe and an exhaust port which is communicated with the air inlet manifold.
2. The ignition type methanol engine combustion system of claim 1, wherein the volume of the dimethyl ether ignition agent in the mixed gas of the mixer accounts for 2-40% of the volume of the mixed gas.
3. A spark ignition type methanol engine combustion system as claimed in claim 1, wherein said methanol storage tank includes a storage tank for storing methanol fuel and a methanol output pipe for communicating said storage tank with said first pipe and said second pipe, and a low pressure pump for increasing an output pressure of methanol fuel in said methanol output pipe is provided on said methanol output pipe.
4. A spark ignition type methanol engine combustion system as claimed in claim 3, wherein the methanol output pipeline is further provided with a methanol heater for performing the first stage heating of the methanol fuel in the methanol output pipeline.
5. A spark ignition type methanol engine combustion system as claimed in claim 4, wherein said methanol engine is connected to said methanol heater through said exhaust manifold, said exhaust manifold is provided with a turbine, and said methanol heater is provided with an exhaust pipe.
6. A spark ignition type methanol engine combustion system as claimed in claim 5, wherein a compressor is provided on the intake pipe, and the compressor is coaxially connected with the turbine.
7. A spark ignition type methanol engine combustion system as claimed in claim 1, wherein the ignition agent pipeline is provided with a first flow control valve for controlling the output of dimethyl ether, and the second pipeline is provided with a second flow control valve for controlling the output of methanol fuel.
8. The ignition type methanol engine combustion system of claim 1, wherein the methanol cracker is communicated with the dimethyl ether storage through a third pipeline, and a first pressure control valve for regulating the opening and closing of the third pipeline is arranged on the third pipeline.
9. A spark ignition type methanol engine combustion system as claimed in claim 1, wherein a methanol fuel flow valve is provided on the fuel line for controlling the flow of vaporized methanol fuel into the mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020725336.5U CN212318179U (en) | 2020-04-30 | 2020-04-30 | Ignition type methanol engine combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020725336.5U CN212318179U (en) | 2020-04-30 | 2020-04-30 | Ignition type methanol engine combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212318179U true CN212318179U (en) | 2021-01-08 |
Family
ID=74024277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020725336.5U Active CN212318179U (en) | 2020-04-30 | 2020-04-30 | Ignition type methanol engine combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212318179U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520259A (en) * | 2020-04-30 | 2020-08-11 | 南方科技大学 | Ignition type methanol engine combustion system and control method |
| CN116220973A (en) * | 2023-03-21 | 2023-06-06 | 北京理工大学 | Method for preheating methanol automobile fuel |
| US12078115B1 (en) * | 2023-06-20 | 2024-09-03 | Caterpillar Inc. | Systems and methods for pilot fuel synthesis using engine waste heat |
-
2020
- 2020-04-30 CN CN202020725336.5U patent/CN212318179U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520259A (en) * | 2020-04-30 | 2020-08-11 | 南方科技大学 | Ignition type methanol engine combustion system and control method |
| CN111520259B (en) * | 2020-04-30 | 2023-08-18 | 南方科技大学 | Ignition type methanol engine combustion system and control method |
| CN116220973A (en) * | 2023-03-21 | 2023-06-06 | 北京理工大学 | Method for preheating methanol automobile fuel |
| US12078115B1 (en) * | 2023-06-20 | 2024-09-03 | Caterpillar Inc. | Systems and methods for pilot fuel synthesis using engine waste heat |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212318179U (en) | Ignition type methanol engine combustion system | |
| CN111520259B (en) | Ignition type methanol engine combustion system and control method | |
| JP5351187B2 (en) | Combustion control by uniform combustion radical ignition (HCRI) or partial uniform combustion radical ignition in a circulating internal combustion engine | |
| CN101571069B (en) | Dual-fuel combustion system for internal combustion engines | |
| CN111520258A (en) | Compression ignition type methanol engine combustion system and control method | |
| WO2021217601A1 (en) | Compression-ignition type methanol engine combustion system and control method | |
| CN109113880B (en) | Combustion organization method of methanol/alcohol hydrogen fuel internal combustion engine and application thereof | |
| CN101907025A (en) | Multi-fuel combustion system of internal combustion machine | |
| CN102906408A (en) | Ammonia-burning internal combustion engine | |
| CN101387229A (en) | Bi-fuel engine using hydrogen | |
| CN109098892A (en) | A kind of engine combined power system based on alternative fuel | |
| CN105114193A (en) | Fuel feed method of methanol/diesel dual-fuel diesel engine | |
| CN212318178U (en) | Compression ignition type methanol engine combustion system | |
| CN115217622B (en) | Ammonia-hydrogen fusion fuel control system based on reactive regulation and control | |
| CN110440251B (en) | Ammonia combustion control method and ammonia combustion device | |
| CN111197532A (en) | Hydrogen/methanol composite fuel engine | |
| CN115234369B (en) | Ammonia-hydrogen fusion fuel diffusion combustion control system based on reactive activity regulation and control | |
| CN102606351A (en) | Automatic hydrogen and oxygen generation method for engine and energy-saving equipment | |
| CN217898006U (en) | Combustion system and engine | |
| CN104747341A (en) | Novel fuel oil heater | |
| CN111156111A (en) | Methanol engine capable of improving heat efficiency | |
| CN204677293U (en) | A kind of direct-injection LNG-diesel dual-fuel system | |
| CN114542278A (en) | Hydrogen ignition type methanol engine combustion system and control method | |
| US5170620A (en) | Sugar fuels for internal combustion engines | |
| CN115596561A (en) | Injection control method and combustion system of diesel ignition high-pressure liquid ammonia direct injection internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |