CN109236507B - Vehicle-mounted methanol online reforming system adopting silk screen separation mechanism and control method - Google Patents
Vehicle-mounted methanol online reforming system adopting silk screen separation mechanism and control method Download PDFInfo
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- CN109236507B CN109236507B CN201811333259.2A CN201811333259A CN109236507B CN 109236507 B CN109236507 B CN 109236507B CN 201811333259 A CN201811333259 A CN 201811333259A CN 109236507 B CN109236507 B CN 109236507B
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 1014
- 238000000926 separation method Methods 0.000 title claims abstract description 71
- 238000002407 reforming Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims description 10
- 239000007789 gas Substances 0.000 claims abstract description 232
- 238000001704 evaporation Methods 0.000 claims abstract description 147
- 230000008020 evaporation Effects 0.000 claims abstract description 140
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 87
- 239000001257 hydrogen Substances 0.000 claims abstract description 87
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000002912 waste gas Substances 0.000 claims abstract description 37
- 230000002000 scavenging effect Effects 0.000 claims abstract description 33
- 230000001502 supplementing effect Effects 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 85
- 238000006243 chemical reaction Methods 0.000 claims description 53
- 239000000203 mixture Substances 0.000 claims description 40
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000005336 cracking Methods 0.000 claims description 11
- 239000003054 catalyst Substances 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000000197 pyrolysis Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 description 11
- 238000001816 cooling Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/10—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone
- F02M25/12—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone the apparatus having means for generating such gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
- C01B3/382—Multi-step processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
- C01B3/384—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts the catalyst being continuously externally heated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
-
- 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
- Y02T10/12—Improving ICE efficiencies
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a vehicle-mounted methanol on-line reforming system adopting a screen separation mechanism, an engine is provided with an air inlet pipe and an exhaust pipe, a reforming device comprises a reformer, an evaporation section and a screen separation section, a hydrogen-rich mixed gas valve is connected with a reformed gas outlet and a hydrogen-rich mixed gas injector through pipelines, a high-temperature tail gas valve is connected with an evaporation section inlet and the exhaust pipe through pipelines, a methanol flow valve is connected with a methanol evaporation pipe inlet and a methanol tank through pipelines, an outlet of a waste gas valve for scavenging is connected with a tail gas inlet for scavenging through pipelines, an inlet of the waste gas valve for scavenging is communicated with the exhaust pipe, and an ECU is respectively electrically connected with the hydrogen-rich mixed gas valve, the waste gas valve for scavenging, a high Wen Wei gas valve, a tail gas valve for supplementing, a methanol flow valve and a methanol injection flow control valve.
Description
Technical Field
The invention belongs to the technical field of automobile exhaust waste heat utilization, and particularly relates to a vehicle-mounted methanol on-line reforming system adopting a silk screen separation mechanism and a control method.
Background
Compared with traditional fossil fuels such as gasoline, diesel oil, natural gas and the like, the hydrogen is clean in combustion, and no emission of particles, hydrocarbon, carbon monoxide and the like is generated; if the lean combustion technology is adopted, the hydrogen combustion can further realize zero emission. Therefore, hydrogen has great potential to replace traditional fossil fuels and become the main fuel for vehicle engines.
However, hydrogen is in a gaseous state at normal temperature and normal pressure, is not easy to transport and store, and is compressed into high-pressure high-density compressed hydrogen by adopting a pressurizing method when in use and is stored in a high-pressure container; meanwhile, the fuel has small molecular weight, wide explosion limit and high combustion speed, and is easy to temper when being used as the fuel of the automobile engine. These properties lead to a high risk of using hydrogen fuel, and the operational safety and reliability of the engine cannot be ensured.
Researches show that the methanol can be subjected to a cracking reaction by adopting an online reforming technology to generate combustible gas rich in hydrogen, so that the ignition and combustion performances of an engine can be effectively improved, and the emission is reduced; moreover, the methanol is liquid under normal temperature and normal pressure, and is very convenient to store and transport. Therefore, the on-line reforming technology can be adopted on the automobile to reform the methanol into the hydrogen-rich mixed gas to be supplied to the engine as the automobile fuel, so that the methanol and the reformed fuel thereof have great potential for application in the automobile power field.
Fig. 1 provides an apparatus for producing hydrogen by reforming methanol using waste heat of automobile exhaust (application number: 2013106687554. X). As shown, the working space is separated into two parts, an evaporation space and a cracking space. Because the working space is large, the sufficient contact between the methanol and the catalyst and the sufficient contact between the methanol and the waste gas cannot be ensured, and therefore, the working efficiency and the working speed are low. Moreover, as can be seen from fig. 1, the solution has a large size, is limited by space and weight in the fields of vehicle-mounted, vehicle-mounted and the like, and is inconvenient to use.
Disclosure of Invention
In order to utilize the heat of the high-temperature tail gas of the engine to realize on-line reforming of vehicle-mounted methanol and crack the methanol fuel into hydrogen-rich combustible gas to supply the vehicle engine, and improve the combustion and emission performance of the engine, the invention provides a vehicle-mounted methanol on-line reforming system adopting a silk screen separating mechanism and a control method, and the technical scheme is as follows:
an on-line reforming system for vehicle-mounted methanol by adopting a silk screen separation mechanism comprises an ECU (Electronic Control Unit, an electronic control unit), a methanol tank, an engine, a reformer, a hydrogen-rich mixed gas valve, a scavenging exhaust valve, a high Wen Wei gas valve, a gas supplementing exhaust valve, a methanol flow valve, a methanol injection flow control valve, a methanol injector and a hydrogen-rich mixed gas injector, wherein the engine is provided with an air inlet pipe and an exhaust pipe, the reformer comprises a reformer, an evaporation section and a silk screen separation section, the reformer is used for realizing evaporation of liquid methanol, on-line reforming and gas-liquid separation of a methanol mixture, the reformer is provided with an evaporation section inlet, a methanol evaporation pipe inlet, a scavenging exhaust gas inlet, a reforming gas outlet, a gaseous methanol outlet and a gas supplementing pipe, the high-temperature exhaust gas valve is used for controlling the flow of high-temperature exhaust gas, the high-temperature exhaust gas valve is connected with the evaporation section inlet and the exhaust pipe through a pipeline, the hydrogen-rich mixed gas valve is used for controlling the flow of hydrogen-rich mixed gas, the hydrogen-rich mixed gas is connected with the reforming gas outlet and the hydrogen-rich mixed gas injector through a pipeline, the hydrogen-rich mixed gas injector is fixed on the air inlet pipe and is used for injecting the hydrogen-rich mixed gas generated after reforming into the engine, the methanol flow valve is used for controlling the flow of the methanol, the methanol is used for the evaporation of the liquid-rich gas, the methanol is used for realizing evaporation of the liquid-phase mixture, the methanol, the reforming gas is used for the on-rich gas, and the exhaust gas is used for the exhaust gas, and the exhaust valve is used for connecting the exhaust valve to the exhaust valve is connected with the exhaust valve through a one-way valve through the exhaust valve for the exhaust valve through a certain point, and is used for connecting the exhaust valve, the methanol injection flow control valve is used for controlling the flow of methanol injected by the methanol injector, and is connected with the methanol tank and the methanol injector through pipelines, the liquid methanol outlet is communicated with the methanol tank through pipelines, the methanol tank is used for storing methanol, the tail gas valve for air supplementing is used for controlling the flow of high-temperature fuel gas for air supplementing, the tail gas valve for air supplementing is connected with the fuel gas supplementing pipe and the exhaust pipe through pipelines, the gaseous methanol outlet is communicated with the reformed fuel gas outlet through pipelines, and the ECU is respectively and electrically connected with the hydrogen-rich mixing valve, the waste gas valve for scavenging, the high Wen Wei valve, the tail gas valve for air supplementing, the methanol flow valve and the methanol injection flow control valve for controlling the opening and closing and the opening of each valve.
The reformer comprises an exhaust gas inlet, an exhaust gas outlet, a reformer body, a methanol reaction channel and a reformate channel, wherein the reformer body comprises a reformer shell and an exhaust gas channel, the reformer shell is sleeved on the outer side of the exhaust gas channel, two ends of the exhaust gas channel are fixedly connected with the exhaust gas outlet and the exhaust gas inlet respectively, the methanol reaction channel is of a tubular structure with an arched section, the methanol reaction channel is spirally wound on the outer surface of the exhaust gas channel, the vault of the methanol reaction channel is made of a selective permeable material, the inner wall of the methanol reaction channel is provided with a catalyst coating, the vault of the methanol reaction channel is fixedly connected with the inner wall of the reformer shell, the arch bottom of the methanol reaction channel is fixedly connected with the outer surface of the exhaust gas channel, a sealed reformate channel is formed between the inner wall of the reformer shell, the outer wall of the exhaust gas channel and the outer wall of the methanol reaction channel, one end of the methanol reaction channel is communicated with a reformed methanol inlet, one end of the reformate channel is communicated with a scavenging tail gas inlet, and the other end of the reformate channel is communicated with a reformed fuel gas outlet.
The reformer further comprises a first thermocouple fixed on the exhaust gas inlet expansion section, and coupling wires of the first thermocouple extend into the exhaust gas channel, and the first thermocouple is electrically connected with the ECU.
The exhaust gas inlet comprises an exhaust gas inlet flange and an exhaust gas inlet expansion section, the exhaust gas inlet expansion section is a cylinder with a narrow opening at one side and a wide opening at the other side, one side of the narrow opening is fixedly connected with the exhaust gas inlet flange, one side of the wide opening is fixedly connected with the exhaust gas channel, and the gas supplementing pipe is arranged on the exhaust gas inlet expansion section;
the waste gas outlet comprises a waste gas outlet flange and a waste gas outlet contraction section, wherein the waste gas outlet contraction section is a cylinder body with a narrow opening at one side and a wide opening at the other side, one side of the narrow opening is fixedly connected with the waste gas outlet flange, and one side of the wide opening is fixedly connected with the waste gas channel.
The evaporation section includes evaporation section export, evaporation section import, methyl alcohol evaporating pipe and evaporation section body, and the both ends of evaporation section body respectively with evaporation section export and evaporation section import fixed connection, evaporation section export with waste gas import intercommunication, methyl alcohol evaporating pipe be the arched tubular structure of section, its spiral winding in the surface of evaporation section body, the arch of methyl alcohol evaporating pipe is at the bottom of and the surface fixed connection of evaporation section body, and the both ends of methyl alcohol evaporating pipe are linked together respectively and are had methyl alcohol evaporating pipe import and methyl alcohol evaporating pipe export, and methyl alcohol evaporating pipe export and reforming methyl alcohol import intercommunication.
The evaporation section outlet comprises an evaporation section outlet flange and an evaporation section outlet convergent section, the evaporation section outlet convergent section is a cylinder with a narrow opening on one side and a wide opening on one side, one side of the narrow opening is fixedly connected with the evaporation section outlet flange, and one side of the wide opening is fixedly connected with the evaporation section pipe body;
the evaporation section inlet comprises an evaporation section inlet flange and an evaporation section inlet divergent section, the evaporation section inlet divergent section is a cylinder with a narrow opening at one side and a wide opening at one side, one side of the narrow opening is fixedly connected with the evaporation section inlet flange, and one side of the wide opening is fixedly connected with the evaporation section pipe body;
the evaporation section further comprises a second thermocouple, the second thermocouple is fixed on the evaporation section inlet diverging section, the coupling wires of the second thermocouple extend into the evaporation section pipe body, and the second thermocouple is electrically connected with the ECU.
The silk screen separation section includes condensation net, separation section casing, liquid collecting cavity and division board, division board horizontal assembly forms on the inner wall of separation section casing between division board below and the separation section shells inner wall liquid collecting cavity is provided with a plurality of liquid collecting hole on the division board, and the vertical a plurality of condensation net that is provided with between division board top and the separation section shells inner wall, the both sides of separation section casing are provided with methanol mixture import and gaseous methanol export respectively, and the bottom of separation section casing is provided with liquid methanol export, liquid methanol export with liquid collecting cavity intercommunication, methanol mixture import pass through the flange and reformer reforming methanol export intercommunication.
The on-vehicle methanol on-line reforming control method adopting the silk screen separation mechanism adopts the on-vehicle methanol on-line reforming system adopting the silk screen separation mechanism, and comprises the following steps:
step 1, when an engine works normally, an ECU controls a methanol injection flow control valve to be opened, a methanol tank supplies liquid methanol for a methanol injector to drive the engine to work, the ECU judges the working condition of the engine according to a sensor signal in the methanol tank, when the ECU judges that hydrogen-rich mixed gas needs to be used for auxiliary combustion, the ECU controls a high-temperature tail gas valve to be opened, high-temperature tail gas of the engine enters an evaporation section of a reforming device from an exhaust passage of the engine through an inlet of the evaporation section, and the reformer is preheated;
step 2, the ECU reads temperature signals of a first thermocouple and a second thermocouple in the reformer, when the temperature in the reformer meets the working requirement, a methanol flow valve is opened under the control of the ECU, liquid methanol flows into a methanol evaporation pipe inlet through a methanol tank, methanol is partially evaporated in an evaporation section, a methanol gas-liquid mixture enters the reformer through a reformed methanol inlet to undergo a cracking reaction, an uncleaved methanol mixture flows into a silk screen separation section through a reformed methanol outlet to be separated, and the condensed liquid methanol returns to the methanol tank;
step 3, flowing out the hydrogen-rich mixed gas generated by methanol pyrolysis from a reformed gas outlet, flowing into a hydrogen-rich mixed gas injector through a hydrogen-rich mixed gas valve, injecting the hydrogen-rich mixed gas into an engine air inlet pipe through the hydrogen-rich mixed gas injector, and simultaneously, merging the gaseous methanol separated in the screen separation section in the step 2 into the hydrogen-rich mixed gas, wherein the opening of the hydrogen-rich mixed gas valve is controlled by an ECU;
and 4, when the reformer stops working, the ECU controls the waste gas valve for scavenging to be opened, a small amount of high-temperature tail gas enters the reformer through the tail gas inlet for scavenging, and the rest hydrogen-rich mixed gas is carried out through the reformed gas outlet and is input into the hydrogen-rich mixed gas injector, so that the working safety of the reformer is ensured.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is used for realizing evaporation, online reforming and gas-liquid separation of a methanol mixture by arranging a reforming device, adopts a hydrogen-rich gas mixture valve to be connected with a reforming gas outlet and a hydrogen-rich gas mixture injector through pipelines, adopts a high-temperature tail gas valve to be connected with an evaporation section inlet and an exhaust pipe through pipelines, adopts a methanol flow valve to be connected with a methanol evaporation pipe inlet and a methanol tank through pipelines, adopts an outlet of a scavenging waste gas valve to be connected with a scavenging tail gas inlet through pipelines, adopts an inlet of the scavenging waste gas valve to be communicated with the exhaust pipe, and is respectively and electrically connected with the hydrogen-rich gas mixture valve, the scavenging waste gas valve, a high Wen Wei gas valve, a gas-supplementing tail gas valve, a methanol flow valve and a methanol injection flow control valve for controlling the opening and closing and opening of each valve; the method realizes the purposes of utilizing the heat of the high-temperature tail gas of the engine, realizing the on-line reforming of the vehicle-mounted methanol and cracking the methanol fuel into hydrogen-rich combustible gas to supply the vehicle engine, and improving the combustion and emission performance of the engine.
2. According to the invention, the separation section is provided, and the S-shaped cooling separation channel formed by the upper cooling screen baffle and the lower cooling screen baffle is arranged in the separation section, so that the gas-liquid separation of the methanol mixture discharged by the reformer can be rapidly realized, and the separated liquid methanol flows back to the methanol tank for storage, and the working efficiency of the reformer is improved.
3. The channel length of the S-shaped cooling separation channel can be further increased through the bent upper cooling screen baffle plate and the bent lower cooling screen baffle plate, and the separation efficiency of the methanol mixture is improved.
4. According to the invention, the methanol reaction channel with the arched section is spirally wound on the outer surface of the waste gas channel, so that the liquid methanol in the methanol reaction channel is fully contacted with the high-temperature waste gas channel, the rapid evaporation of the liquid methanol is realized, the reaction speed of methanol pyrolysis is accelerated, and the working efficiency is improved.
5. The vault of the methanol reaction channel is made of the selectively permeable material, the methanol reaction channel is spirally wound on the outer surface of the waste gas channel, and a gas-liquid mixture formed by liquid methanol and hydrogen-rich mixed gas generated by cracking the methanol reaction channel generates centrifugal force when flowing in the methanol reaction channel, so that the hydrogen-rich mixed gas is rapidly separated from the gas-liquid mixture, passes through the vault of the methanol reaction channel and reaches the reformate channel, the separation efficiency of the hydrogen-rich mixed gas is improved, and the working efficiency is improved.
6. After the hydrogen-rich mixed gas is generated, convection is generated with the liquid methanol in the methanol reaction channel under the action of centrifugal force, so that the mixing uniformity of the gas-liquid mixture is improved, the contact area of the liquid methanol and a catalyst is increased, the heat exchange efficiency between the liquid methanol and a high-temperature waste gas channel is improved, the reaction speed of methanol pyrolysis is accelerated, more hydrogen-rich mixed gas is generated, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art scheme;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a flow chart of a control method of the present invention;
FIG. 4 is a schematic diagram of a reformer according to the present disclosure;
FIG. 5 is a schematic cross-sectional view of a methanol reaction channel according to the present invention;
wherein: an exhaust gas outlet flange 1; an exhaust gas inlet flange 2; a reformer body 3; a scavenging exhaust gas inlet 31; a reformed gas outlet 32; a reformer housing 33; an exhaust passage 34; a methanol reaction channel 4; a reformed methanol inlet 41; a reformed methanol outlet 42; a dome 43; a catalyst coating 44; an arch bottom 45; a gas supplementing pipe 5; a reformate passage 6; a first thermocouple 7; an exhaust gas outlet constriction 8; an exhaust gas inlet expansion section 9; an evaporation section 10; an evaporation section outlet flange 101; an evaporator inlet flange 102; an evaporation section outlet tapered section 103; an evaporator inlet diverging section 104; an evaporation section tube 105; a methanol evaporation tube inlet 1051; a methanol evaporation tube outlet 1052; a methanol line interface flange 106; a methanol evaporation tube 107; a second thermocouple 108; a wire mesh separating section 11; a condensing net 111; a separation section housing 112; a liquid collection chamber 113; a partition plate 114; a liquid collection hole 115; a methanol mixture inlet 116; a gaseous methanol outlet 117; a liquid methanol outlet 12; an ECU 13; a methanol tank 14; an engine 15; a reformer 16; a hydrogen-rich gas mixing valve 17; a scavenging exhaust valve 18; a high temperature tail gas valve 19; a tail gas valve 20 for gas supply; a methanol flow valve 21; a methanol injection flow rate control valve 22; a methanol injector 23; a hydrogen rich gas injector 24; an intake pipe 25; an exhaust pipe 26; a reformer 27.
Detailed Description
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
As shown in fig. 2 to 5, the present invention provides an on-line methanol reforming system employing a wire mesh separation mechanism, comprising an ECU 13, a methanol tank 14, an engine 15, a reformer 16, a hydrogen rich gas mixing valve 17, a scavenging exhaust valve 18, a high temperature exhaust valve 19, a make-up exhaust valve 20, a methanol flow valve 21, a methanol injection flow control valve 22, a methanol injector 23 and a hydrogen rich gas mixture injector 24, the engine 15 is provided with an intake pipe 25 and an exhaust pipe 26, the reformer 16 comprises a reformer 27, an evaporation section 10 and a wire mesh separation section 11, the reformer 16 is for effecting evaporation of liquid methanol, on-line reforming and gas-liquid separation of a methanol mixture, the reformer 16 is provided with an evaporation section inlet, a methanol evaporation pipe inlet 1051, a scavenging exhaust inlet 31, a reformed gas outlet 32, a methanol outlet 119, a liquid methanol outlet 12 and a gas make-up pipe 5, the high Wen Wei valve 19 is used for controlling the flow of high-temperature tail gas, and is connected with the inlet of the evaporation section and the exhaust pipe 26 through a pipeline, the hydrogen-rich mixed valve 17 is used for controlling the flow of hydrogen-rich mixed gas, and is connected with the reformed gas outlet 32 and the hydrogen-rich mixed gas injector 24 through a pipeline, the hydrogen-rich mixed gas injector 24 is fixed on the air inlet pipe 25 and is used for injecting the reformed hydrogen-rich mixed gas to the air inlet pipe 25 of the engine 15, the methanol flow valve 21 is used for controlling the flow of liquid methanol, and is connected with the inlet 1051 of the methanol evaporation section and the methanol tank 14 through a pipeline, the scavenging exhaust valve 18 is specifically a one-way valve and is used for discharging the hydrogen-rich mixed gas remained in the reformer 27, the outlet of the scavenging exhaust valve 18 is connected with the scavenging exhaust gas inlet 31 through a pipeline, the inlet of the scavenging exhaust valve 18 is communicated with any point on the pipeline between the inlet of the evaporation section and the exhaust pipe 26, specifically, the exhaust valve 18 for scavenging is communicated with the pipeline between the inlet of the evaporation section and the high-temperature exhaust valve 19, the methanol injector 23 is installed on the engine 15 and is used for injecting methanol fuel into the cylinder of the engine 15, the methanol injection flow control valve 22 is used for controlling the flow rate of the methanol injected by the methanol injector 23, the methanol injector is connected with the methanol tank 14 and the methanol injector 23 through the pipeline, the liquid methanol outlet 12 is communicated with the methanol tank 14 through the pipeline and is used for returning the uncleaved liquid methanol to the methanol tank 14 for continuous utilization, the methanol tank 14 is used for storing methanol, the exhaust valve 20 for supplementing the high-temperature fuel gas for supplementing the gas is used for controlling the flow rate of the high-temperature fuel gas for supplementing the gas, the gas supplementing pipe 5 and the exhaust pipe 26 are connected through the pipeline, when the first thermocouple 7 and the second thermocouple 108 judge that the temperature of the reformer 16 is lower than the working temperature, a small amount of the high-temperature fuel gas can be introduced through the gas supplementing the gas pipe 5 and is used for improving the temperature in the reformer 16, the gaseous methanol outlet 119 is communicated with the reformed gas outlet 32 through the pipeline, the purpose of further utilizing the gaseous methanol separated by the silk screen separation section 11 is achieved, and the ECU 13 is respectively connected with the hydrogen mixing valve 17, the exhaust valve 18, the high-temperature exhaust valve 19, the exhaust valve 20, the exhaust valve 21 and the exhaust valve for supplementing the high-temperature valve 21 and the exhaust valve for controlling the opening and the valve.
The hydrogen rich gas injector 24 is specifically a gas injector, and is well known in the art as the methanol injector 23, and will not be described in detail herein.
The reformer 27 comprises an exhaust gas inlet, an exhaust gas outlet, a reformer body 3, a methanol reaction channel 4 and a reformate channel 6, the reformer body 3 comprises a reformer shell 33 and an exhaust gas channel 34, the reformer shell 33 is sleeved outside the exhaust gas channel 34, the reformer shell 33 is fixedly connected with the exhaust gas channel 34 through the methanol reaction channel 4, two ends of the exhaust gas channel 34 are respectively fixedly connected with the exhaust gas outlet and the exhaust gas inlet, the methanol reaction channel 4 is of a tubular structure with an arched section, the tubular structure is spirally wound on the outer surface of the exhaust gas channel 34, a dome 43 of the methanol reaction channel 4 is made of a selective permeable material, the selective permeable material is made of a polytetrafluoroethylene film or the like and can separate hydrogen-rich mixed gas from liquid methanol, the inner wall of the methanol reaction channel 4 is provided with a catalyst coating 44, the catalyst is a catalyst which can catalyze a methanol cracking reaction, such as CuZnAl, the dome 43 of the methanol reaction channel 4 is fixedly connected with the inner wall of the reformer shell 33, the dome bottom 45 of the methanol reaction channel 4 is fixedly connected with the outer surface of the exhaust gas channel 34, the dome 43 of the methanol reaction channel 4 forms a sealed reformate channel 6 between the inner wall of the outer wall of the reformer shell 34 and the outer wall of the methanol reaction channel 4, one end of the reformate channel 4 is communicated with the reformate channel 31, and the other end of the reformate channel is communicated with the reformate channel 31 is communicated with the reformate channel 6, and the other end of the reformate channel is communicated with the reformate channel 31.
The reformer 27 further includes a first thermocouple 7, the first thermocouple 7 is fixed to the exhaust gas inlet expansion section 9, and the coupling wires of the first thermocouple 7 extend into the exhaust gas passage 34, and the first thermocouple 7 is electrically connected with the ECU 13.
The exhaust gas inlet comprises an exhaust gas inlet flange 2 and an exhaust gas inlet expansion section 9, the exhaust gas inlet expansion section 9 is a cylinder with a narrow opening at one side and a wide opening at the other side, one side of the narrow opening is fixedly connected with the exhaust gas inlet flange 2, one side of the wide opening is fixedly connected with an exhaust gas channel 34, and a gas supplementing pipe 5 is arranged on the exhaust gas inlet expansion section 9;
the waste gas outlet comprises a waste gas outlet flange 1 and a waste gas outlet contraction section 8, wherein the waste gas outlet contraction section 8 is a cylinder with a narrow opening on one side and a wide opening on the other side, one side of the narrow opening is fixedly connected with the waste gas outlet flange 1, and one side of the wide opening is fixedly connected with the waste gas channel 34.
The evaporation section 10 comprises an evaporation section outlet, an evaporation section inlet, a methanol evaporation tube 107 and an evaporation section tube 105, wherein two ends of the evaporation section tube 105 are fixedly connected with the evaporation section outlet and the evaporation section inlet respectively, the evaporation section outlet is communicated with the waste gas inlet, the methanol evaporation tube 107 is of a tubular structure with an arched section, the methanol evaporation tube 107 is spirally wound on the outer surface of the evaporation section tube 105, the arch bottom of the methanol evaporation tube 107 is fixedly connected with the outer surface of the evaporation section tube 105, two ends of the methanol evaporation tube 107 are respectively communicated with a methanol evaporation tube inlet 1051 and a methanol evaporation tube outlet 1052, the methanol evaporation tube outlet 1052 is communicated with the reformed methanol inlet 41, and the methanol evaporation tube outlet 1052 is communicated with the reformed methanol inlet 41 through a methanol pipeline interface flange 106.
The evaporation section outlet comprises an evaporation section outlet flange 101 and an evaporation section outlet tapered section 103, the evaporation section outlet tapered section 103 is a cylinder with a narrow opening on one side and a wide opening on one side, one side of the narrow opening is fixedly connected with the evaporation section outlet flange 101, and one side of the wide opening is fixedly connected with the evaporation section pipe 105;
the evaporator inlet comprises an evaporator inlet flange 102 and an evaporator inlet divergent section 104, the evaporator inlet divergent section 104 is a cylinder with a narrow opening on one side and a wide opening on one side, one side of the narrow opening is fixedly connected with the evaporator inlet flange 102, and one side of the wide opening is fixedly connected with an evaporator tube 105;
the evaporation section 10 further comprises a second thermocouple 108, the second thermocouple 108 is fixed on the evaporation section inlet diverging section 104, and coupling wires of the second thermocouple 108 extend into the evaporation section pipe body 105, and the second thermocouple 108 is electrically connected with the ECU 13.
The first thermocouple 7 and the second thermocouple 108 are used to monitor the temperature in the exhaust gas channel 34 and the evaporator end pipe body 105, respectively.
The screen separation section 11 comprises a condensation net 111, a separation section shell 112, a liquid collecting cavity 113 and a separation plate 114, the separation plate 114 is horizontally assembled on the inner wall of the separation section shell 112, the liquid collecting cavity 113 is formed between the lower part of the separation plate 114 and the inner wall of the separation section shell 112, a plurality of liquid collecting holes 115 are formed in the separation plate 114, liquid methanol separated from a methanol mixture flows into the liquid collecting cavity 113 through the liquid collecting holes 115, a plurality of condensation nets 111 are vertically arranged between the upper part of the separation plate 114 and the inner wall of the separation section shell 112, and in this embodiment, 7 condensation nets 111 are arranged, the number of the condensation nets 111 can be properly increased or reduced according to actual needs, a methanol mixture inlet 116 and a gaseous methanol outlet 117 are respectively arranged on two sides of the separation section shell 112, a liquid methanol outlet 12 is arranged at the bottom of the separation section shell 112 and is communicated with the liquid collecting cavity 113, and the methanol mixture inlet 116 is communicated with a reforming methanol outlet 42 of the reformer through a flange.
The residual methanol gas-liquid mixture in the reformer reaction flows into a methanol mixture inlet 116 through a reforming methanol outlet 42 and enters a screen separation section 11, the methanol mixture passes through a plurality of condensing screens 111, part of the methanol mixture is condensed into liquid methanol on the condensing screens 111, the liquid methanol flows downwards due to gravity and flows into a liquid collecting cavity 113 through a liquid collecting hole 115, and finally is discharged through a liquid methanol outlet 12, and flows back to a methanol tank 14 for storage, and uncondensed gaseous methanol is discharged through a gaseous methanol outlet 117 and directly output to an engine for combustion.
The reformer 16 of the present invention operates as follows:
firstly, high-temperature tail gas of an engine 15 enters the inside of an evaporation section 10 through an evaporation section inlet flange 102; when the temperature inside the evaporation section 10 reaches the operating temperature, as measured by the second thermocouple 108, liquid methanol starts to enter the methanol evaporation tube 107 through the methanol evaporation tube inlet 1051.
The heat of the high-temperature tail gas in the evaporation section pipe body 105 is transferred to the liquid methanol in the methanol evaporation pipe 107 through the side wall of the evaporation section pipe body 105, and the liquid methanol is partially evaporated into a gaseous state; the methanol gas-liquid mixture enters the reforming methanol inlet 41 through the methanol evaporation pipe outlet 1052, and a cracking reaction occurs in the methanol reaction channel 4, so that the speed of the methanol cracking reaction is further improved, and meanwhile, the high Wen Wei gas quantity of the engine 15 entering the evaporation section 10 can be adjusted, so that a sufficient quantity of gaseous methanol can be ensured to enter the reforming methanol inlet 41 through the methanol evaporation pipe outlet 1052.
The heat of the high-temperature tail gas in the waste gas channel 34 is transferred to the methanol gas-liquid mixture in the methanol reaction channel 4 through the side wall of the waste gas channel 34, the methanol gas-liquid mixture continuously flows to the downstream of the methanol reaction channel 4, and as the catalyst is coated on the inner wall of the methanol reaction channel 4, the methanol is subjected to cracking reaction under the action of the catalyst at high temperature to generate hydrogen-rich mixed gas; meanwhile, as the dome 43 of the methanol reaction channel 4 is made of the selectively permeable material, the generated hydrogen-rich mixed gas enters the reformate channel 6 through the dome 43 of the methanol reaction channel 4 under the action of centrifugal force and the permeable material, and the liquid methanol is positioned at the outer side of the hydrogen-rich mixed gas under the action of the centrifugal force, the hydrogen-rich mixed gas and the liquid methanol are convected under the action of gravity, the hydrogen-rich mixed gas moves upwards, and meanwhile, a part of the liquid methanol downwards contacts with the high-temperature surface, so that the evaporation efficiency of the liquid methanol is improved, and the reaction speed of methanol pyrolysis is accelerated.
The hydrogen-rich mixed gas flows out through a reformed fuel outlet and is input to a fuel nozzle, an intake valve, a head part and other positions of the engine 15 where the gas is needed; the unreacted liquid methanol flows to the methanol mixture inlet 118 through the reforming methanol outlet 42, enters the screen separation section 11, passes through the S-shaped cooling separation channel 117, and part of the methanol mixture is condensed into liquid methanol on the channel wall of the S-shaped cooling separation channel 117, the liquid methanol flows downwards due to gravity, flows into the liquid collecting cavity 114 through the liquid collecting hole 116, finally is discharged through the liquid methanol outlet 12, flows back to the methanol tank 14 for storage, and the uncondensed gaseous methanol is discharged through the gaseous methanol outlet 119 and directly output to the engine 15 for combustion.
Finally, under the control of the ECU 13, a small portion of the engine 15 exhaust gas flows in through the scavenging exhaust gas inlet 31 to push out the hydrogen-rich combustible mixture remaining in the methanol reaction channel 4, ensuring the system safety. During this time, the thermocouple monitors the temperature in the exhaust passage 34 over time and controls the flow of high temperature exhaust gas accordingly.
The on-vehicle methanol on-line reforming control method adopting the silk screen separation mechanism adopts the on-vehicle methanol on-line reforming system adopting the silk screen separation mechanism, and comprises the following steps:
step 1, when the engine 15 works normally, the ECU 13 controls the methanol injection flow control valve 22 to open, the methanol tank 14 supplies liquid methanol for the methanol injector 23 to drive the engine 15 to work, the ECU 13 judges the working condition of the engine 15 according to the sensor signal in the engine, when judging that the hydrogen-rich mixed gas needs to be used for assisting combustion, the ECU 13 controls the high Wen Wei air valve 19 to open, high-temperature tail gas of the engine 15 enters the evaporation section 10 of the reforming device 16 from the exhaust passage of the engine 15 through the inlet of the evaporation section, and the reforming device 16 is preheated;
step 2, the ECU 13 reads temperature signals of the first thermocouple 7 and the second thermocouple 108 in the reformer 16, when the temperature in the reformer 16 meets the working requirement, the methanol flow valve 21 is opened under the control of the ECU 13, liquid methanol flows into the methanol evaporation pipe inlet 1051 through the methanol tank 14, the methanol is partially evaporated in the evaporation section 10, a methanol gas-liquid mixture enters the reformer 27 through the reforming methanol inlet 41 to undergo a cracking reaction, an uncleaved methanol mixture flows into the wire mesh separation section 11 through the reforming methanol outlet 42 to be separated, and the condensed liquid methanol returns to the methanol tank 14;
step 3, the hydrogen-rich mixed gas generated by methanol pyrolysis flows out from a reformed gas outlet 32, flows into a hydrogen-rich mixed gas injector 24 through a hydrogen-rich mixed gas valve 17, and is injected into an air inlet pipe 25 of an engine 15 by the hydrogen-rich mixed gas injector 24, and meanwhile, the gaseous methanol separated in the screen separation section 11 in step 2 is merged into the hydrogen-rich mixed gas, and the opening of the hydrogen-rich mixed gas valve 17 is controlled by an ECU 13;
in step 4, when the reformer 16 stops working, the ECU 13 controls the scavenging exhaust valve 18 to open, a small amount of high-temperature exhaust gas enters the reformer 27 through the scavenging exhaust gas inlet 31, and the remaining hydrogen-rich mixture gas is carried out through the reformed gas outlet 32 and is input to the hydrogen-rich mixture gas injector 24, so that the working safety of the reformer 16 is ensured.
Claims (7)
1. The on-line reforming system for vehicle-mounted methanol adopting a silk screen separation mechanism is characterized by comprising an ECU (electronic control unit), a methanol tank, an engine, a reforming device, a hydrogen-rich mixed gas valve, a scavenging exhaust valve, a high Wen Wei gas valve, a gas supplementing exhaust valve, a methanol flow valve, a methanol injection flow control valve, a methanol injector and a hydrogen-rich mixed gas injector, wherein the engine is provided with an air inlet pipe and an exhaust pipe, the reforming device comprises a reformer, an evaporation section and a silk screen separation section, the reforming device is used for realizing evaporation of liquid methanol, on-line reforming and gas-liquid separation of a methanol mixture, the reforming device is provided with an evaporation section inlet, a methanol evaporation pipe inlet, a scavenging exhaust gas inlet, a reforming gas outlet, a gaseous methanol outlet and a gas supplementing pipe, the high-temperature exhaust gas valve is used for controlling the flow of the high-temperature exhaust gas, the high-temperature exhaust gas valve is connected with the evaporation section inlet and the exhaust pipe through a pipeline, the hydrogen-rich mixed gas valve is used for controlling the flow of hydrogen-rich mixed gas through the pipeline, the hydrogen-rich mixed gas injector is fixed on the air inlet pipe and used for injecting the reformed hydrogen-rich mixed gas into the air inlet pipe, the methanol flow valve is used for controlling the flow of the methanol, the methanol flow is used for controlling the flow of the methanol which is connected with the methanol in the methanol injector through the evaporation section and the methanol inlet pipe, the methanol is connected with the methanol injector for the exhaust gas injector to the exhaust valve for controlling the flow through the exhaust gas through a specific valve, the scavenging valve is connected with the exhaust gas inlet for the exhaust gas through the one-side of the exhaust valve, the exhaust valve and the exhaust valve is connected with the exhaust valve through the exhaust valve for controlling the exhaust valve through one-way, the system comprises a methanol tank, a methanol ejector, a liquid methanol outlet, a methanol tank, a tail gas valve, a gas-state methanol outlet, a reforming gas outlet, a hydrogen-rich mixed gas valve, a scavenging waste gas valve, a high Wen Wei gas valve, a gas-compensating tail gas valve, a methanol flow valve and a methanol injection flow control valve, wherein the liquid methanol outlet is communicated with the methanol tank through a pipeline;
the reformer comprises an exhaust gas inlet, an exhaust gas outlet, a reformer body, a methanol reaction channel and a reformate channel, wherein the reformer body comprises a reformer shell and an exhaust gas channel, the reformer shell is sleeved on the outer side of the exhaust gas channel, two ends of the exhaust gas channel are fixedly connected with the exhaust gas outlet and the exhaust gas inlet respectively, the methanol reaction channel is of a tubular structure with an arched section, the methanol reaction channel is spirally wound on the outer surface of the exhaust gas channel, the vault of the methanol reaction channel is made of a selective permeable material, the inner wall of the methanol reaction channel is provided with a catalyst coating, the vault of the methanol reaction channel is fixedly connected with the inner wall of the reformer shell, the arch bottom of the methanol reaction channel is fixedly connected with the outer surface of the exhaust gas channel, a sealed reformate channel is formed among the inner wall of the reformer shell, the outer wall of the exhaust gas channel and the outer wall of the methanol reaction channel, one end of the methanol reaction channel is communicated with a reformed methanol inlet, one end of the reformate channel is communicated with a scavenging tail gas inlet, and the other end of the reformate channel is communicated with a reformed fuel gas outlet.
The silk screen separation section includes condensation net, separation section casing, liquid collecting cavity and division board, division board horizontal assembly forms on the inner wall of separation section casing between division board below and the separation section shells inner wall liquid collecting cavity is provided with a plurality of liquid collecting hole on the division board, and the vertical a plurality of condensation net that is provided with between division board top and the separation section shells inner wall, the both sides of separation section casing are provided with methanol mixture import and gaseous methanol export respectively, and the bottom of separation section casing is provided with liquid methanol export, liquid methanol export with liquid collecting cavity intercommunication, methanol mixture import pass through the flange and reformer reforming methanol export intercommunication.
2. The on-vehicle methanol on-line reforming system using a wire mesh separation mechanism as defined in claim 1, wherein the reformer further comprises a first thermocouple fixed to the exhaust gas inlet expansion section, and wherein the coupling wires of the first thermocouple extend into the exhaust gas passage, the first thermocouple being electrically connected to the ECU.
3. The on-line methanol reforming system with a screen separation mechanism according to claim 2, wherein the exhaust gas inlet comprises an exhaust gas inlet flange and an exhaust gas inlet expansion section, the exhaust gas inlet expansion section is a cylinder with a narrow opening on one side and a wide opening on the other side, one side of the narrow opening is fixedly connected with the exhaust gas inlet flange, one side of the wide opening is fixedly connected with the exhaust gas channel, and the gas supplementing pipe is arranged on the exhaust gas inlet expansion section;
the waste gas outlet comprises a waste gas outlet flange and a waste gas outlet contraction section, wherein the waste gas outlet contraction section is a cylinder body with a narrow opening at one side and a wide opening at the other side, one side of the narrow opening is fixedly connected with the waste gas outlet flange, and one side of the wide opening is fixedly connected with the waste gas channel.
4. The on-line methanol reforming system with a screen separation mechanism according to claim 3, wherein the evaporation section comprises an evaporation section outlet, an evaporation section inlet, a methanol evaporation tube and an evaporation section tube body, two ends of the evaporation section tube body are fixedly connected with the evaporation section outlet and the evaporation section inlet respectively, the evaporation section outlet is communicated with the exhaust gas inlet, the methanol evaporation tube is of a tubular structure with an arch-shaped section, the methanol evaporation tube is spirally wound on the outer surface of the evaporation section tube body, the arch bottom of the methanol evaporation tube is fixedly connected with the outer surface of the evaporation section tube body, two ends of the methanol evaporation tube are respectively communicated with a methanol evaporation tube inlet and a methanol evaporation tube outlet, and the methanol evaporation tube outlet is communicated with the reformed methanol inlet.
5. An on-board methanol on-line reforming system employing a wire mesh separation mechanism as defined in claim 4, wherein,
the evaporation section outlet comprises an evaporation section outlet flange and an evaporation section outlet convergent section, the evaporation section outlet convergent section is a cylinder with a narrow opening on one side and a wide opening on one side, one side of the narrow opening is fixedly connected with the evaporation section outlet flange, and one side of the wide opening is fixedly connected with the evaporation section pipe body;
the evaporator inlet comprises an evaporator inlet flange and an evaporator inlet divergent section, the evaporator inlet divergent section is a cylinder with a narrow opening on one side and a wide opening on one side, one side of the narrow opening is fixedly connected with the evaporator inlet flange, and one side of the wide opening is fixedly connected with the evaporator pipe body.
6. An on-board methanol on-line reforming system employing a wire mesh separation mechanism as defined in claim 5, wherein,
the evaporation section further comprises a second thermocouple, the second thermocouple is fixed on the evaporation section inlet diverging section, the coupling wires of the second thermocouple extend into the evaporation section pipe body, and the second thermocouple is electrically connected with the ECU.
7. An on-vehicle methanol on-line reforming control method adopting a screen separation mechanism, which adopts the on-vehicle methanol on-line reforming system adopting the screen separation mechanism as claimed in claim 1, and is characterized by comprising the following steps:
step 1, when an engine works normally, an ECU controls a methanol injection flow control valve to be opened, a methanol tank supplies liquid methanol for a methanol injector to drive the engine to work, the ECU judges the working condition of the engine according to a sensor signal in the methanol tank, when the ECU judges that hydrogen-rich mixed gas needs to be used for auxiliary combustion, the ECU controls a high-temperature tail gas valve to be opened, high-temperature tail gas of the engine enters an evaporation section of a reforming device from an exhaust passage of the engine through an inlet of the evaporation section, and the reformer is preheated;
step 2, the ECU reads temperature signals of a first thermocouple and a second thermocouple in the reformer, when the temperature in the reformer meets the working requirement, a methanol flow valve is opened under the control of the ECU, liquid methanol flows into a methanol evaporation pipe inlet through a methanol tank, methanol is partially evaporated in an evaporation section, a methanol gas-liquid mixture enters the reformer through a reformed methanol inlet to undergo a cracking reaction, an uncleaved methanol mixture flows into a silk screen separation section through a reformed methanol outlet to be separated, and the condensed liquid methanol returns to the methanol tank;
step 3, flowing out the hydrogen-rich mixed gas generated by methanol pyrolysis from a reformed gas outlet, flowing into a hydrogen-rich mixed gas injector through a hydrogen-rich mixed gas valve, injecting the hydrogen-rich mixed gas into an engine air inlet pipe through the hydrogen-rich mixed gas injector, and simultaneously, merging the gaseous methanol separated in the screen separation section in the step 2 into the hydrogen-rich mixed gas, wherein the opening of the hydrogen-rich mixed gas valve is controlled by an ECU;
and 4, when the reformer stops working, the ECU controls the waste gas valve for scavenging to be opened, a small amount of high-temperature tail gas enters the reformer through the tail gas inlet for scavenging, and the rest hydrogen-rich mixed gas is carried out through the reformed gas outlet and is input into the hydrogen-rich mixed gas injector, so that the working safety of the reformer is ensured.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08291774A (en) * | 1995-04-19 | 1996-11-05 | Isuzu Ceramics Kenkyusho:Kk | Alcohol reformed gas engine |
| WO2009064712A1 (en) * | 2007-11-12 | 2009-05-22 | Massachusetts Inst Technology | Fuel management system tor very high efficiency flex fuel engines |
| CN101982653A (en) * | 2010-10-22 | 2011-03-02 | 北京工业大学 | Preparation and storage device of reformed gas and control method thereof |
| CN103693618A (en) * | 2013-12-19 | 2014-04-02 | 华南理工大学 | Hydrogen production reactor for carrying out autothermal reforming hydrogen production employing car exhaust waste heat |
| CN103708418A (en) * | 2013-12-11 | 2014-04-09 | 浙江大学 | Device for methanol reforming hydrogen production by utilizing waste heat of automobile exhaust gas |
-
2018
- 2018-11-09 CN CN201811333259.2A patent/CN109236507B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08291774A (en) * | 1995-04-19 | 1996-11-05 | Isuzu Ceramics Kenkyusho:Kk | Alcohol reformed gas engine |
| WO2009064712A1 (en) * | 2007-11-12 | 2009-05-22 | Massachusetts Inst Technology | Fuel management system tor very high efficiency flex fuel engines |
| CN101982653A (en) * | 2010-10-22 | 2011-03-02 | 北京工业大学 | Preparation and storage device of reformed gas and control method thereof |
| CN103708418A (en) * | 2013-12-11 | 2014-04-09 | 浙江大学 | Device for methanol reforming hydrogen production by utilizing waste heat of automobile exhaust gas |
| CN103693618A (en) * | 2013-12-19 | 2014-04-02 | 华南理工大学 | Hydrogen production reactor for carrying out autothermal reforming hydrogen production employing car exhaust waste heat |
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