CN203048584U - Microwave plasma reforming system for vehicle-mounted fuel - Google Patents

Microwave plasma reforming system for vehicle-mounted fuel Download PDF

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Publication number
CN203048584U
CN203048584U CN 201220640698 CN201220640698U CN203048584U CN 203048584 U CN203048584 U CN 203048584U CN 201220640698 CN201220640698 CN 201220640698 CN 201220640698 U CN201220640698 U CN 201220640698U CN 203048584 U CN203048584 U CN 203048584U
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microwave
magnetron
reaction chamber
circulator
chamber
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Withdrawn - After Issue
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CN 201220640698
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Chinese (zh)
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王庆年
王郑强
王军年
闫佳伟
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Jilin University
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Jilin University
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Abstract

The utility model relates to the microwave plasma online conversion technology for fuels and the field of control of plasma converters. A microwave plasma reforming system for a vehicle-mounted fuel mainly comprises an industrial personal computer, a magnetron, a magnetron power control device, a power adjusting reflector, a circulator, an ignition cavity and a reaction cavity, wherein the industrial personal computer is used for acquiring signals in the whole system and sending microwave power adjusting signals to the magnetron power control device; the magnetron power control device is used for adjusting the power supply voltage of the magnetron, so that the output power of the magnetron is continuous and adjustable; the magnetron is connected with the circulator through a magnetron seat; the circulator is connected with the ignition cavity and the reaction cavity respectively; the magnetron is used for converting electrical energy into microwave and outputting the microwave; and according to the fact that whether ignition is carried out in the ignition cavity or not, the industrial personal computer sends baffle depth adjusting signals to the power adjusting reflector to adjust the reflection ratio of the power adjusting reflector. The system can excite plasma under relatively low power and maintain the state of the plasma so as to save energy.

Description

The microwave plasma reforming system of onboard fuel
Technical field
The utility model relates to microwave plasma on-line conversion technology, the plasma transmodulator control field of fuel.
Background technology
Microwave heating is compared with traditional heating means very big difference, and the traditional heating method is to rely on thermal source, by approach such as radiation, conduction, convection current, at first makes the object surfaces heating, then through thermal conduction, temperature inside is from outward appearance to inner essence progressively raise.And that microwave has is energy-efficient, rate of heating fast, homogeneous heating, instantaneity, safety and environmental protection, sanitation and hygiene, be suitable for advantage such as control.Therefore the relevant device of design research and development microwave heating is pressing for of human social development.
Because plasma body has higher temperature and energy density, can produce activeconstituents, thereby cause physical change and the chemical reaction that in the conventional chemical reaction, can not or be difficult to realize.Therefore this patent design one cover is by the plasma reforming device system of microwave-driven, have efficient, easily start, advantage such as easy to control.The microwave energy that is used for driving microwave plasma reformer can produce by microwave sources such as magnetron, transit time tube, semiconductor microactuator wave producers.The microwave frequency that native system adopts is 2.45GHz, and microwave transmission line is rectangular waveguide, has advantages such as simple in structure, that physical strength is big, can also avoid external interference and radiation loss.
Some investigators have studied microwave plasma with different methods.The mode of activated plasma has plug ignition, laser ignition, corona discharge pulse igniting, dielectric barrier discharge etc.By also can activated plasma [August 11,1998 for United States Patent, No.5793013] to the particular design of resonator cavity, [B1, March 27,2001 for United States Patent, No.6205769].Document [S.P.Kuo, " A microwave-augmented plasma torch module as anigniter/fuel injector of a scramjet engine ", Department of Electrical﹠amp; Computer Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, NY 11201] in introduced a kind of miniaturization, low flow velocity, the integrated plasma generating device of injection igniting, utilize special waveguide shapes, the concentration of energy of generation can effectively realize igniting.Document [Hidetoshi Sekiguchi and Yoshihiro Mori, " Steam plasma reforming usingmicrowave discharge ", Thin Solid Films, Vol.453, pp.44-48,2003] done the research that microwave discharge generates the pure steam plasma body in the atmosphere, and with the research of reforming plasma hydrocarbon polymer hydrogen manufacturing, and used a rectangular cavity that does not have hot regeneration, microwave power and current control.
Summary of the invention
The described several sparking mode of background technology have certain limitation, the plug ignition mode needs periodic replacement, environment is had higher requirements, sparking mode such as laser, pulse needs high-voltage, high alternating voltage, document [S.P.Kuo, " Amicrowave-augmented plasma torch module as an igniter/fuel injector of a scramjet engine ", Department of Electrical﹠amp; Computer Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, NY 11201] what produce is low flow velocity plasma body, what be unfavorable for reacting carries out fast.Document [HidetoshiSekiguchi and Yoshihiro Mori, " Steam plasma reforming using microwave discharge ", Thin SolidFilms, Vol.453, pp.44-48,2003] electromagnetic field analysis is also than being easier in simple in structure, the chamber of rectangular cavity in, and still the electromagnetic field field intensity that obtains is less relatively, the distance of reactant gases in the chamber is short, and transformation efficiency is lower.Therefore, the utility model has designed two special cavitys---igniting chamber 1014 and annulus reaction chamber 1015; Igniting chamber 1014 is used for lighting plasma body, and geometrical shape is taper, microwave by the time can form the high-density microwave energy, have very high field intensity, when field intensity reaches the breaking down field strength of gas, will produce the microwave sparking, mixed gas is lighted.Reaction chamber 1015 is designed to the cylinder body shape of annular, and ring cross-section is identical with the rectangular waveguide sectional dimension, is conducive to the propagation of microwave in reaction chamber, and produces higher field intensity, and is continual for reaction provides energy, keeps reaction to be in plasmoid.By transferring the control of reverberator 1013 to make total system possess self-starting function to electricity.
For solving top technical problem, the utility model provides a kind of microwave plasma reforming system of novel, efficient, the onboard fuel that starts fast, compact construction.
The technical solution of the utility model accompanying drawings is as follows:
A kind of microwave plasma reforming system of onboard fuel, mainly by industrial computer, magnetron, the magnetron power source regulation device, electricity is transferred reverberator, circulator, igniting chamber and reaction chamber are formed, described industrial computer 1001 is used for gathering the signal in the total system, and send microwave power conditioning signals 1002 for magnetron power source regulation device 1003 according to requirement of experiment, regulate magnetron 1004 voltage of supply by magnetron power source regulation device 1003, make magnetron 1004 output ratings adjustable continuously, described magnetron 1004 is connected by the magnetic control base with circulator 1012, circulator 1012 is connected with reaction chamber 1015 with igniting chamber 1014 respectively, magnetron 1004 is used for electric energy is changed into the microwave output of 2.45GHz frequency, according to whether lighting a fire in the igniting chamber, industrial computer 1001 transfers reverberator 1013 to send metal cylinder 1024 depth adjustment signals 1005 for electricity, regulates the reflection ratio that electricity is transferred reverberator 1013.
Described electricity transfers reverberator 1013 to be connected with igniting chamber 1014 with circulator 1012, be used for regulating the microwave energy that enters igniting chamber 1014, when igniting after chamber 1014 finishes igniting, need by regulate metal cylinder 1024 depth of penetration that electricity transfers reverberator 1013 with microwave reflection in reaction chamber 1015.
Described circulator 1012 adopts two, connect by a U-shaped waveguide 1011, the lower port I 1006 of following circulator 1012 connects magnetron 1004, lower port II 1008 connects electricity and transfers reverberator 1013, lower port III 1007 connects U-shaped waveguide 1011, the upper port I 1006 ' of the circulator 1012 of top connects reaction chamber 1015, upper port II 1008 ' connect absorbing load 1010, upper port III 1007 ' connect U-shaped waveguide 1011, microwave is from lower port I 1006 inputs of below circulator 1012, the electricity that arrives lower port II 1008 is earlier transferred reverberator 1013, transfer the adjusting of reverberator 1013 by electricity, microwave is reflected to the U-shaped waveguide 1011 of lower port III1007, by U-shaped waveguide 1011 propagate into the top circulator 1012 upper port III 1007 ', enter the reaction chamber 1015 of upper port I1006 ' then, the microwave that from reaction chamber 1015, reflects along circulator 1012 enter upper port II 1008 ' absorbing load 1010, microwave is propagated along such track and is avoided microwave reflection to return magnetron 1004, and magnetron 1004 is burnt.
Described igniting chamber 1014 is designed to curved tapers, at the cone-shaped cavity place, between the upper and lower apart from diminishing gradually, seamlessly transitted by camber line, working is, when microwave by the time form the high-density microwave energy and have field intensity, when field intensity reaches the breaking down field strength of gas, produce sparking, reactant gases is lighted; Described reaction chamber 1015 is designed to the cylinder body shape of annular, and its ring cross-section and U-shaped waveguide 1011 square-sections are measure-alike, is beneficial to the propagation of microwave in reaction chamber 1015, and is continual for reaction provides energy, keeps reaction to be in plasmoid; Mixed gas enters igniting chamber 1014 and reaction chamber 1015 by vertically passing the silica tube 1016 that links to each other with reaction chamber 1015 of igniting chamber 1014, is beneficial to insulation and observation.
Described silica tube 1016 vertically passes igniting chamber 1014 can produce two circular holes that diameter is identical with the silica tube diameter, for preventing that microwave can be by circular hole to external irradiation, at circular hole periphery processing coupling aperture 1018, overflow to reduce microwave, add pin 1017 in igniting chamber 1014 and the reaction chamber 1015, regulate impedance matching by regulating pin 1017 depth of penetration.
Described silica tube 1016 penetrates and passes the circular hole that reaction chamber 1015 can stay two silica tube diameter, for preventing microwave leakage, open several coupling apertures 1018 at the circular hole periphery, and at the several pins 1017 of reaction chamber 1015 annulus surface adding, make reaction chamber 1015 reach resonant condition by the depth of penetration of regulating pin 1017.
Described silica tube 1016 is crooked up and down along being parallel to reaction 1015 axial direction dues in reaction chamber 1015, to increase the stroke of reactant gases in reaction chamber 1015, has improved reactivity, and raw material is fully reacted.
Compared with prior art, the utlity model has following effect:
(1) each parts connects compact and reasonable more, reduces volume and saves cost
(2) optimized being connected of igniting chamber and reaction chamber, improved microwave and lighted a fire and heating efficiency
(3) integrated microwave igniting and microwave heating function transfer reverberator to regulate igniting and heating in one by electricity
(4) native system can continuously adjustablely carry out chemical reaction, and has the transformation efficiency of very high chemical reaction
Description of drawings
The microwave plasma reforming system of Fig. 1 onboard fuel
The microwave plasma reforming system A-A of Fig. 2 onboard fuel is to view
Fig. 3 chamber of lighting a fire
Fig. 4 lights a fire chamber A-A to view
Fig. 5 reaction chamber
Fig. 6 reaction chamber B-B view
Fig. 7 reaction chamber A-A view
Fig. 8 electricity is transferred reflector structure figure
Among the figure:
1001. industrial computer, 1002. microwave power conditioning signals, 1003. magnetron power source regulation devices, 1004. magnetron, 1005. electricity are transferred reverberator baffle plate degree of depth adjustment signal, 1006. lower port I, 1006 ' upper port I, 1007. lower port III, 1007 '. the upper port III, 1008. lower port II, 1008 '. upper port II, 1009. ring flanges, 1010. absorbing load, 1011.U the shape waveguide, 1012. circulators, 1013. electricity are transferred reverberator, 1014. igniting chamber, 1015. reaction chamber, 1016. silica tubes, 1017. pins, 1018. coupling aperture, 1019. coupling iris, 1020. reaction chamber outer walls, 1021. reaction chamber inwalls, 1022. coupling bar seam, 1023. motor, 1024. metal cylinders, 1025. waveguide cross sections.
Embodiment
The microwave plasma reforming system is consulted Fig. 1: industrial computer 1001 is used for the signal in the acquisition system, and send microwave power conditioning signals 1002 for magnetron power source regulation device 1003 according to requirement of experiment, make magnetron 1004 output ratings adjustable continuously, according to whether lighting a fire in the igniting chamber, industrial computer 1001 transfers reverberator 1013 to send metal cylinder (1024) depth adjustment signal 1005 for electricity, regulates the reflection ratio that electricity is transferred reverberator 1013.Magnetron 1004 is used for electric energy is changed into the microwave output of 2.45GHz frequency, and magnetron power source regulation device 1003 is used for regulating magnetron 1004 voltage of supply, makes magnetron 1004 output ratings adjustable continuously.The magnetic control base is used for connecting magnetron 1004 and circulator 1012.Circulator 1012 is used for connecting igniting chamber 1014 and reaction chamber 1015, and microwave is propagated in circulator 1012 has unidirectional transmission property, and the incident wave energy is passed through smoothly, and reflection wave is owing to being absorbed by resistance and can not passing through.Electricity transfers reverberator 1013 to be connected with igniting chamber 1014 with circulator 1012, be used for regulating the microwave energy that enters igniting chamber 1014, when igniting after chamber 1014 finishes igniting, need by regulate baffle plate depth of penetration that electricity transfers reverberator 1013 with microwave reflection in reaction chamber 1015.Absorbing load 1010 is used for absorbing the microwave energy that reflects from reaction chamber 1015, avoids microwave reflection to return magnetron 1004, and magnetron 1004 is burnt.Consult Fig. 1 and Fig. 2, native system adopts two circulators 1012, connect by a U-shaped waveguide 1011, the lower port I 1006 of following circulator 1012 connects magnetron 1004, lower port II 1008 connects electricity and transfers reverberator 1013, and lower port III 1007 connects U-shaped waveguide 1011, and the upper port I1006 ' of the circulator 1012 of top connects reaction chamber 1015, upper port II 1008 ' connects absorbing load 1010, upper port III 1007 ' connect U-shaped waveguide 1011.Design can realize that microwave is from lower port I 1006 inputs of below circulator 1012 like this, the electricity that arrives lower port II 1008 is earlier transferred reverberator 1013, transfer the adjusting microwave of reverberator 1013 to be reflected to the U-shaped waveguide 1011 of lower port III 1007 by electricity, by U-shaped waveguide 1011 propagate into the top circulator 1012 upper port III 1007 ', enter the reaction chamber 1015 of upper port I 1006 ' then, the microwave that reflects from reaction chamber 1015 enters the absorbing load 1010 of upper port II 1008 ' along circulator 1012, microwave is propagated along such track and can be avoided microwave reflection to return magnetron 1004, and magnetron 1004 is burnt.Such structure can realize the function of system, and puts compactness, reasonable, has reduced the volume of system.The contacted design of igniting chamber 1014 and reaction chamber 1015, the microwave radiation of bringing in the time of can avoiding silica tube 1016 to pass igniting chamber 1014 and enter reaction chamber 1015, the while also is conducive to the heat-insulating property of silica tube 1016.
Fig. 3 is the synoptic diagram in igniting chamber 1014, igniting chamber 1014 is designed to curved tapers, at the cone-shaped cavity place, between the upper and lower apart from diminishing gradually, seamlessly transitted by camber line, thereby the increase of field intensity herein, when field intensity reaches the breaking down field strength of reactant gases, reactant gases in the silica tube 1016 is provoked into plasmoid, so native system has the self-starting advantage.
Fig. 4, silica tube 1016 vertically passes igniting chamber 1014, can produce the circular hole that diameter is identical with silica tube 1015 diameters with reaction chamber 1015 connections, because silica tube 1015 can not stop microwave, microwave can be by circular hole to external irradiation, thereby, add several coupling apertures 1018 at the circular hole periphery, opposite by phase place, microwave energy offsets principle, position and the quantity of appropriate design coupling aperture 1018 reduce overflowing of microwave energy.The tip in igniting chamber 1014 adds two (quantity is decided according to the actual requirements) pins 1017, by regulating the depth of penetration of pin 1017, regulates the impedance matching in igniting chamber 1014, improves the field intensity in the igniting chamber 1014.
Fig. 5 is the conceptual schematic drawing of reaction chamber 1015.The design of reaction chamber 1015 need make that the microwave energy in the cavity is high as far as possible, therefore reaction chamber 1015 is made the cylinder of annular, can form the energy strong point at the cavity center like this, can reduce the volume of reaction chamber simultaneously.Reaction chamber 1015 links to each other with circulator 1012 by coupling iris 1019, imports microwave by coupling iris 1019 in reaction chamber 1015.Violent burning in the silica tube 1016 of reactant gases in reaction chamber 1015, silica tube 1016 penetrates and passes the circular hole that reaction chamber 1015 can stay two silica tube diameter, can cause microwave leakage, therefore open several coupling apertures 1018 at the circular hole periphery, the same millet cake fire of method chamber 1014 is identical.Add several pins 1017 in appropriate location, reaction chamber 1015 annulus surface, make reaction chamber 1015 reach resonant condition by the depth of penetration of regulating pin 1017.
Fig. 6 puts synoptic diagram for silica tube 1016 in reaction chamber 1015, silica tube 1016 in reaction chamber 1015 crooked up and down along being parallel to reaction chamber 1015 axial direction dues, to increase the stroke of reactant gases in reaction chamber 1015, improved reactivity, raw material is fully reacted.Choosing of silica tube 1016 is because it has advantages such as good heat insulating, light transmission are good, made things convenient for observed and recorded and the successful reaction of testing to carry out.
Fig. 7 is the coupling iris 1019 of microwave system, and microwave is imported microwave by coupling iris 1019 in reaction chamber 1015, and by optimizing hole seam size and reaction chamber 1015 sizes of coupling iris 1019, makes reaction chamber 1015 reach resonant condition.

Claims (7)

1. the microwave plasma reforming system of an onboard fuel, mainly by industrial computer, magnetron, the magnetron power source regulation device, electricity is transferred reverberator, circulator, igniting chamber and reaction chamber are formed, it is characterized in that, described industrial computer (1001) is used for gathering the signal in the total system, and send microwave power conditioning signal (1002) for magnetron power source regulation device (1003) according to requirement of experiment, regulate magnetron (1004) voltage of supply by magnetron power source regulation device (1003), make magnetron (1004) output rating adjustable continuously, described magnetron (1004) is connected by the magnetic control base with circulator (1012), circulator (1012) is connected with reaction chamber (1015) with igniting chamber (1014) respectively, magnetron (1004) is used for electric energy is changed into microwave output, according to whether lighting a fire in the igniting chamber, industrial computer (1001) transfers reverberator (1013) to send metal cylinder (1024) depth adjustment signal (1005) for electricity, regulates the reflection ratio that electricity is transferred reverberator (1013).
2. the microwave plasma reforming system of a kind of onboard fuel according to claim 1, it is characterized in that, described electricity transfers reverberator (1013) to be connected with igniting chamber (1014) with circulator (1012), be used for regulating the microwave energy that enters igniting chamber (1014), after igniting is finished in igniting chamber (1014), need transfer metal cylinder (1024) depth of penetration of reverberator (1013) that microwave reflection is arrived in the reaction chamber (1015) by regulating electricity.
3. the microwave plasma reforming system of a kind of onboard fuel according to claim 1, it is characterized in that, described circulator (1012) adopts two, connect by a U-shaped waveguide (1011), the lower port I (1006) of following circulator (1012) connects magnetron (1004), lower port II (1008) connects electricity and transfers reverberator (1013), lower port III (1007) connects U-shaped waveguide (1011), the upper port I (1006 ') of the circulator (1012) of top connects reaction chamber (1015), upper port II (1008 ') connects absorbing load (1010), upper port III (1007 ') connects U-shaped waveguide (1011), microwave is from lower port I (1006) input of below circulator (1012), the electricity that arrives lower port II (1008) is earlier transferred reverberator (1013), transfer the adjusting of reverberator (1013) by electricity, microwave is reflected to the U-shaped waveguide (1011) of lower port III (1007), propagate into the upper port III (1007 ') of the circulator (1012) of top by U-shaped waveguide (1011), enter the reaction chamber (1015) of upper port I (1006 ') then, the microwave that reflects from reaction chamber (1015) enters the absorbing load (1010) of upper port II (1008 ') along circulator (1012), microwave is propagated along such track and is avoided microwave reflection to return magnetron (1004), and magnetron (1004) is burnt.
4. the microwave plasma reforming system of a kind of onboard fuel according to claim 1, it is characterized in that, described igniting chamber (1014) is designed to curved tapers, at the cone-shaped cavity place, between the upper and lower apart from diminishing gradually, seamlessly transitted by camber line, working is, when microwave by the time form the high-density microwave energy and have field intensity, when field intensity reaches the breaking down field strength of gas, produce sparking, reactant gases is lighted; Described reaction chamber (1015) is designed to the cylinder body shape of annular, its ring cross-section and U-shaped waveguide (1011) square-section are measure-alike, be beneficial to the propagation of microwave in reaction chamber (1015), continual for reaction provides energy, keep reaction to be in plasmoid; Mixed gas enters igniting chamber 1014 and reaction chamber 1015 by vertically passing the silica tube (1016) that links to each other with reaction chamber 1015 of igniting chamber (1014), is beneficial to insulation and observation.
5. the microwave plasma reforming system of a kind of onboard fuel according to claim 4, it is characterized in that, described silica tube (1016) vertically passes igniting chamber (1014) can produce two circular holes that diameter is identical with the silica tube diameter, for preventing that microwave can be by circular hole to external irradiation, at circular hole periphery processing coupling aperture (1018), overflow to reduce microwave, add pin (1017) in igniting chamber (1014) and the reaction chamber (1015), regulate impedance matching by regulating pin (1017) depth of penetration.
6. the microwave plasma reforming system of a kind of onboard fuel according to claim 4, it is characterized in that, described silica tube (1016) penetrates and passes the circular hole that reaction chamber (1015) can stay two silica tube diameter, for preventing microwave leakage, open several coupling apertures (1018) at the circular hole periphery, and at reaction chamber (1015) annulus surface adding several pins (1017), make reaction chamber (1015) reach resonant condition by the depth of penetration of regulating pin (1017).
7. the microwave plasma reforming system of a kind of onboard fuel according to claim 4, it is characterized in that, described silica tube (1016) is crooked up and down along being parallel to reaction (1015) axial direction due in reaction chamber (1015), to increase the stroke of reactant gases in reaction chamber (1015), improved reactivity, raw material is fully reacted.
CN 201220640698 2012-11-28 2012-11-28 Microwave plasma reforming system for vehicle-mounted fuel Withdrawn - After Issue CN203048584U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102976271A (en) * 2012-11-28 2013-03-20 吉林大学 Microwave plasma reforming system for vehicle fuel
CN104470183A (en) * 2014-12-04 2015-03-25 浙江中控研究院有限公司 Self-tuning magnetron microwave source MPT, self-tuning device and control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102976271A (en) * 2012-11-28 2013-03-20 吉林大学 Microwave plasma reforming system for vehicle fuel
CN104470183A (en) * 2014-12-04 2015-03-25 浙江中控研究院有限公司 Self-tuning magnetron microwave source MPT, self-tuning device and control method
CN104470183B (en) * 2014-12-04 2017-11-21 浙江全世科技有限公司 Can self-tuning microwave magnetron source MPT, self-tuning device and control method

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Granted publication date: 20130710

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