CN109179322B - Online methanol reformer for preparing hydrogen-rich gas by utilizing heat of engine tail gas - Google Patents
Online methanol reformer for preparing hydrogen-rich gas by utilizing heat of engine tail gas Download PDFInfo
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- CN109179322B CN109179322B CN201811333315.2A CN201811333315A CN109179322B CN 109179322 B CN109179322 B CN 109179322B CN 201811333315 A CN201811333315 A CN 201811333315A CN 109179322 B CN109179322 B CN 109179322B
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 447
- 239000007789 gas Substances 0.000 title claims abstract description 113
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 37
- 239000001257 hydrogen Substances 0.000 title claims abstract description 37
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 56
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 239000002912 waste gas Substances 0.000 claims description 45
- 230000008676 import Effects 0.000 claims description 18
- 238000002407 reforming Methods 0.000 claims description 12
- 230000008602 contraction Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 4
- 230000002000 scavenging effect Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 description 74
- 230000008020 evaporation Effects 0.000 description 67
- 239000007788 liquid Substances 0.000 description 24
- 239000000446 fuel Substances 0.000 description 11
- 238000005336 cracking Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 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
- 238000004880 explosion Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000005484 gravity Effects 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
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 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
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
-
- 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 from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
-
- 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
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0405—Purification by membrane separation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/06—Integration with other chemical processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0833—Heating by indirect heat exchange with hot fluids, other than combustion gases, product gases or non-combustive exothermic reaction product gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1005—Arrangement or shape of catalyst
- C01B2203/1035—Catalyst coated on equipment surfaces, e.g. reactor walls
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
- C01B2203/1076—Copper or zinc-based catalysts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/12—Feeding the process for making hydrogen or synthesis gas
- C01B2203/1205—Composition of the feed
- C01B2203/1211—Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
- C01B2203/1217—Alcohols
- C01B2203/1223—Methanol
-
- 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
Abstract
The invention relates to an on-line methanol reformer for preparing hydrogen-rich gas by utilizing heat of engine tail gas, wherein a reformer shell is sleeved on the outer side of an exhaust gas channel, two ends of the exhaust gas channel are fixedly connected with an exhaust gas outlet and an exhaust gas inlet respectively, a methanol reaction channel is of a tubular structure with an arched section and spirally wound on the outer surface of the exhaust gas channel, a vault of the methanol reaction channel is made of a selectively permeable material, a catalyst coating is arranged on the inner wall of the methanol reaction channel, the vault of the methanol reaction channel is fixedly connected with the inner wall of the reformer shell, the vault of the methanol reaction channel is fixedly connected with the outer surface of the exhaust gas channel, and a sealed reformed product 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.
Description
Technical Field
The invention belongs to the technical field of tail gas waste heat utilization, and particularly relates to an online methanol reformer for preparing hydrogen-rich gas by utilizing heat of tail gas of an engine.
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, becoming the primary fuel for 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 fuel of an internal combustion 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 methanol is reformed into the hydrogen-rich gas by adopting an online reforming technology and is supplied to the engine as the fuel in real time, so that the methanol and the reformed fuel thereof have great potential for application in the fields of internal combustion engines, aeroengines and the like.
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 realize on-line reforming of methanol fuel by utilizing heat of high-temperature tail gas of an engine and supply of the methanol fuel into the engine by cracking the methanol fuel into hydrogen-rich combustible gas, the technical scheme of the invention is as follows:
the utility model provides an utilize engine exhaust heat to prepare online methanol reformer of hydrogen-rich gas, which comprises a reformer, the reformer includes the waste gas import, the waste gas export, the reformer body, methanol reaction passageway and reformate passageway, the reformer body includes reformer shell and waste gas passageway, the reformer shell cover is located the waste gas passageway outside, the both ends of waste gas passageway respectively with waste gas export and waste gas import fixed connection, methanol reaction passageway is the tubular structure of section for arch, its spiral winding in the surface of waste gas passageway, methanol reaction passageway's vault adopts selectively permeable material to make, methanol reaction passageway's inner wall is provided with the catalyst coating, methanol reaction passageway's vault and reformer shell's inner wall fixed connection, methanol reaction passageway's hunch end and waste gas passageway's outer wall between form sealed reformate passageway, methanol reaction passageway's one end intercommunication has reformed methanol import, methanol reaction passageway's other end intercommunication has reformed methanol export, reformed product passageway's one end intercommunication has the scavenge gas import, reformed gas export is had in the other end intercommunication of reformed product passageway.
The reformer further includes a first thermocouple fixed to the exhaust gas inlet expansion section, and coupling wires of the first thermocouple extend into the exhaust gas passage.
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, and one side of the wide opening is fixedly connected with the exhaust gas channel;
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 exhaust gas inlet expansion section is also communicated with a gas supplementing pipe.
Still include the evaporation zone, the evaporation zone includes evaporation zone export, evaporation zone import, methyl alcohol evaporating pipe and evaporation zone body, the both ends of evaporation zone body respectively with evaporation zone export and evaporation zone import fixed connection, evaporation zone export with waste gas import intercommunication, the methyl alcohol evaporating pipe is the arched tubular structure of section, its spiral winding in the surface of evaporation zone body, the arch bottom of methyl alcohol evaporating pipe and the surface fixed connection of evaporation zone body, the both ends of methyl alcohol evaporating pipe communicate respectively has methyl alcohol evaporating pipe import and methyl alcohol evaporating pipe export, 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 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.
The evaporation section further comprises a second thermocouple, the second thermocouple is fixed on the evaporation section inlet diverging section, and the coupling wires of the second thermocouple extend into the evaporation section pipe body.
Compared with the prior art, the invention has the beneficial effects that:
1. 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.
2. 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.
3. 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.
4. The invention has simple and reasonable structure and small system, can be used alone as a reformer or matched with an evaporation section, and can meet the requirements of different equipment and working conditions.
Drawings
FIG. 1 is a schematic diagram of a prior art scheme;
FIG. 2 is a schematic diagram of a reformer according to the present invention;
FIG. 3 is a schematic view of a reformer and evaporator end of the present invention;
FIG. 4 is a schematic cross-sectional view of a methanol reaction channel according to the present invention;
FIG. 5 is a schematic diagram of the operation of the reformer of the present invention;
FIG. 6 is a schematic diagram of the operation of the reformer of the present invention in combination with an evaporator end.
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.
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 6, the invention provides an online methanol reformer for preparing hydrogen-rich gas by utilizing heat of engine exhaust gas, which comprises a reformer, wherein the reformer 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 and the exhaust gas channel 34 are fixed through the methanol reaction channel 4, the left and right ends of the exhaust gas channel 34 are respectively and fixedly connected with the exhaust gas outlet and the exhaust gas inlet, the methanol reaction channel 4 is in a tubular structure with an arched section, the methanol reaction channel 4 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 polytetrafluoroethylene membrane and other materials capable of separating hydrogen-rich mixed gas and liquid methanol, the inner wall of the methanol reaction channel 4 is provided with a catalyst coating 44, the catalyst is made of CuZnAl and other catalyst capable of catalyzing a methanol cracking reaction, the inner wall 43 of the methanol reaction channel 4 is fixedly connected with the inner wall of the reformer shell 33, the dome 45 of the methanol reaction channel 4 is fixedly connected with the bottom 45 of the exhaust gas channel 34, the dome 45 of the methanol reaction channel 4 is fixedly connected with the inner wall of the outer wall of the reformer shell 34, the reforming channel 6 is communicated with the reformate channel 6, the left and right ends of the reformate channel 6 are communicated with the reformate channel 6, and the reforming channel is communicated with the inlet end of the reformate channel 6, and the reformate channel is communicated with the reformate channel is formed by the inlet and the reformate channel 6.
The reformer further includes a first thermocouple 7, the first thermocouple 7 being fixed to the exhaust gas inlet expansion section 9, and the coupling wires of the first thermocouple 7 extending into the exhaust gas passage 34.
The exhaust gas inlet comprises an exhaust gas inlet flange 2 and an exhaust gas inlet expansion section 9, wherein the exhaust gas inlet expansion section 9 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 2, and one side of the wide opening is fixedly connected with the exhaust gas channel 34.
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 exhaust gas inlet expansion section 9 is further communicated with a gas supplementing pipe 5, the purpose of the gas supplementing pipe 5 is to control the temperature in the exhaust gas channel 34, and if the first thermocouple 7 judges that the working temperature of the reformer is lower than the working temperature, a small amount of high-temperature gas can be introduced through the gas supplementing pipe 5 to improve the temperature in the exhaust gas channel 34.
The utility model provides an utilize engine exhaust heat to prepare online methanol reformer of hydrogen-rich gas, still include evaporation zone 10, evaporation zone 10 includes the evaporation zone export, evaporation zone import, methanol evaporation pipe 107 and evaporation zone body 105, evaporation zone body 105's both ends respectively with evaporation zone export and evaporation zone import fixed connection, evaporation zone export and waste gas import intercommunication, methanol evaporation pipe 107 is the tubular structure of arch in section, its spiral winding is in evaporation zone body 105's surface, methanol evaporation pipe 107's hunch end and evaporation zone body 105's surface fixed connection, methanol evaporation pipe 107's both ends communicate respectively has methanol evaporation pipe import 1051 and methanol evaporation pipe export 1052, methanol evaporation pipe export 1052 communicates with reforming methanol import 41 through methanol pipeline interface flange 106.
The evaporation section outlet comprises an evaporation section outlet flange 101 and an evaporation section outlet tapered section 103, wherein the evaporation section outlet tapered section 103 is a cylinder with a narrow opening on one side and a wide opening on one side, the narrow opening on one side is fixedly connected with the evaporation section outlet flange 101, and the wide opening on one side 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, the narrow opening on one side is fixedly connected with the evaporator inlet flange 102, and the wide opening on one side is fixedly connected with an evaporator tube 105.
The evaporator section 10 further includes a second thermocouple 108, the second thermocouple 108 being fixed to the evaporator section inlet diverging section 104, and the coupling wires of the second thermocouple 108 extending into the evaporator section tube 105.
The first thermocouple 7 and the second thermocouple 108 are electrically connected to an ECU (Electronic Control Unit ) (not shown) for monitoring the temperatures in the exhaust gas passage 34 and the evaporation stage pipe body 105, respectively.
The working principle of the invention is as follows:
when only a reformer is used: the working process is as shown in fig. 5, firstly, the high-temperature tail gas of the engine enters the exhaust channel 34 through the exhaust inlet flange 2; when the temperature in the off-gas passage 34 reaches the operating temperature as measured by the first thermocouple 7, liquid methanol in a methanol fuel tank (not shown) starts to be introduced into the methanol reaction passage 4 at a certain speed through the reformed methanol inlet 41.
The heat of the high-temperature tail gas in the waste gas channel 34 is transferred to the liquid methanol in the methanol reaction channel 4 through the side wall of the waste gas channel 34, and the liquid methanol is quickly evaporated into a gaseous state; the methanol mixed by gas and liquid continuously flows to the downstream of the methanol reaction channel 4, and the methanol is subjected to cracking reaction under the action of high temperature and the catalyst to generate hydrogen-rich mixed gas because the catalyst is coated on the inner wall of the methanol reaction channel 4; 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 is downward contacted with the high-temperature surface, so that the evaporation efficiency of the liquid methanol is improved, and the reaction speed of methanol pyrolysis is improved.
The hydrogen-rich mixed gas flows out through a reforming fuel outlet and is input to the positions of an engine fuel nozzle, an intake valve, a head part and the like where the gas is needed; while unreacted liquid methanol flows out through the reformed methanol outlet 42 back to the methanol fuel tank;
finally, under the control of the ECU, a small portion of the engine exhaust gas flows in through the exhaust gas inlet 31 for scavenging, so as to push out the hydrogen-rich combustible mixture gas remaining in the methanol reaction channel 4, thereby ensuring the safety of the system. 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.
When the reformer is used in conjunction with the evaporator section 10: as shown in fig. 6, first, engine high-temperature tail gas enters the inside of the evaporation section 10 through the 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 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 remaining steps are identical to those when only the reformer is used, and will not be described again here.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (7)
1. The utility model provides an utilize engine exhaust heat to prepare online methanol reforming ware of hydrogen-rich gas, a serial communication port, including the reformer, the reformer includes the waste gas import, the waste gas export, the reformer body, methanol reaction passageway and reformate passageway, the reformer body includes reformer shell and waste gas passageway, the outer side of waste gas passageway is located to the outer cover of reformer shell, waste gas passageway's both ends respectively with waste gas export and waste gas import fixed connection, methanol reaction passageway is the tubular structure of section for arch, its spiral winding is in the surface of waste gas passageway, methanol reaction passageway's vault adopts selectively permeable material to make, methanol reaction passageway's inner wall is provided with the catalyst coating, methanol reaction passageway's vault and reformer shell's inner wall fixed connection, methanol reaction passageway's arch bottom and waste gas passageway's surface fixed connection, form sealed reformate passageway between reformer shell inner wall, methanol reaction passageway's outer wall and the methanol reaction passageway's outer wall, methanol reaction passageway's one end intercommunication has reformed methanol import, methanol reaction passageway's other end intercommunication has reformed methanol export, reformed product passageway's one end intercommunication has scavenging tail gas import, reformed gas export is had in the intercommunication of reformate passageway.
2. An in-line methanol reformer for producing a hydrogen-rich gas using engine exhaust heat as in claim 1, further comprising a first thermocouple secured to the exhaust gas inlet expansion section, and wherein the filaments of the first thermocouple extend into the exhaust gas passage.
3. The on-line methanol reformer for producing hydrogen-rich gas using engine exhaust heat as claimed in claim 2, wherein the exhaust gas inlet includes an exhaust gas inlet flange and an exhaust gas inlet expansion section, the exhaust gas inlet expansion section is a cylinder with one side being narrow and the other side being wide, one side of the narrow and the wide opening being fixedly connected with the exhaust gas inlet flange, and one side of the wide opening being fixedly connected with the exhaust gas channel;
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. An on-line methanol reformer for producing hydrogen-rich gas using engine exhaust heat as in claim 3 wherein said exhaust gas inlet expansion section is further coupled to a gas make-up tube.
5. The on-line methanol reformer for producing hydrogen-rich gas by utilizing engine exhaust heat as in claim 4, further comprising an evaporator section, wherein the evaporator section comprises an evaporator section outlet, an evaporator section inlet, a methanol evaporator tube and an evaporator section tube body, wherein two ends of the evaporator section tube body are fixedly connected with the evaporator section outlet and the evaporator section inlet respectively, the evaporator section outlet is communicated with the exhaust gas inlet, the methanol evaporator tube is of a tubular structure with an arched section, the methanol evaporator tube is spirally wound on the outer surface of the evaporator section tube body, the arch bottom of the methanol evaporator tube is fixedly connected with the outer surface of the evaporator section tube body, two ends of the methanol evaporator tube are respectively communicated with the methanol evaporator tube inlet and the methanol evaporator tube outlet, and the methanol evaporator tube outlet is communicated with the reformed methanol inlet.
6. The on-line methanol reformer for producing hydrogen-rich gas using engine exhaust heat as in claim 5, wherein the evaporator section outlet comprises an evaporator section outlet flange and an evaporator section outlet tapered section, the evaporator section outlet tapered section is a cylinder with a narrow opening on one side and a wide opening on one side, the narrow opening side is fixedly connected with the evaporator section outlet flange, and the wide opening side is fixedly connected with the evaporator section pipe;
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.
7. The on-line methanol reformer for producing hydrogen-rich gas using engine exhaust heat as in claim 6, wherein the evaporator section further comprises a second thermocouple, the second thermocouple is fixed on the evaporator section inlet diverging section, and coupling wires of the second thermocouple extend into the evaporator section tube.
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| CN109751158A (en) * | 2018-12-20 | 2019-05-14 | 刘法锐 | A kind of vehicle fuel evaporator using tail gas heat quantity |
| CN109761193B (en) * | 2019-03-20 | 2024-04-09 | 浙江工业大学 | Methanol reforming hydrogen production reactor |
| CN214745624U (en) * | 2020-12-10 | 2021-11-16 | 广东醇氢新能源研究院有限公司 | Steam generator and hydrogen production system |
| CN114687873A (en) * | 2022-04-11 | 2022-07-01 | 浙江吉利控股集团有限公司 | Fuel supply method, device and system for methanol engine |
| CN114909238B (en) * | 2022-05-20 | 2023-05-12 | 哈尔滨工程大学 | Fuel low-temperature reforming device, hierarchical control method thereof and temperature control method thereof |
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