Plasma reaction device and reaction method for reforming hydrocarbon liquid fuel

Abstract

The invention discloses a plasma reaction device and reaction method for reforming hydrocarbon liquid fuel, and the plasma reaction device comprises a catalysis part, a reforming part and a plasma generation assembly which are communicated in sequence; the plasma generation assembly is used for generating plasma; the reforming part is used for carrying out primary fission and reforming reaction on reactants entering the reforming part by utilizing plasmas generated by the plasma generation assembly, and the catalysis part is used for carrying out secondary fission and reforming reaction on reformed products entering the reforming part from the reforming part. When being used, the reaction device and the reaction method can be independently used for liquid fuel reforming and can also be combined with a catalyst to further improve the efficiency, fuel macromolecular chemical bonds are opened firstly through plasmas, the reaction efficiency of the catalyst is improved, and catalyst deactivation is reduced. The reaction device provided by the invention can tolerate high temperature generated by reforming reaction, is good in air tightness and high in safety, and can realize long-term stable operation.

Description

Technical Field

[0001] The present invention relates to the technical field of energy reaction processing, and in particular to a plasma reaction device and a reaction method for reforming hydrocarbon liquid fuel. Background Art

[0003] In recent years, the production, carrying, storage and transportation technology of hydrogen is still limited, and safety, cost and other issues have restricted the further expansion and application of hydrogen energy. Therefore, countries around the world have begun to study hydrocarbon fuel reforming hydrogen production technology to provide support for the application of hydrogen energy in small and medium-scale, decentralized scenarios. Among them, liquid fuels such as ethanol, methanol, diesel, gasoline, etc., including the existing fuel supply system, are the focus of fuel reforming technology research at the current stage.

[0004] The currently more mature fuel reforming hydrogen production technology usually requires the use of a large number of catalysts to achieve a high fuel conversion rate. However, the inherent lifespan and easy deactivation of catalyst technology have limited the development of catalyst fuel reformers. Considering the cost and economy, it is more suitable for large factories. Plasma has the characteristics of high temperature and high chemical activity. Its active free radicals can assist and promote the dissociation and recombination of fuel molecules, and quickly undergo reforming reactions to produce hydrogen-containing mixed gases. It is an efficient small-scale on-site hydrogen production technology and an effective means to achieve further development and utilization of hydrogen energy. Summary of the invention

[0005] In view of the above technical problems, the purpose of the present invention is to propose a plasma reaction device and reaction method for hydrocarbon liquid fuel reforming, which can be used alone for liquid fuel reforming or used in conjunction with a catalyst to further improve efficiency. The plasma first opens the chemical bonds of fuel macromolecules, improves catalyst reaction efficiency, and reduces catalyst deactivation. The proposed reaction device can withstand the high temperature generated by the reforming reaction, has good airtightness and high safety, and can achieve long-term stable operation.

[0006] In order to achieve the above-mentioned object, the present invention provides a plasma reaction device for reforming hydrocarbon liquid fuel, wherein the plasma reaction device comprises a catalytic part, a reforming part and a plasma generating assembly which are connected in sequence; wherein:

[0007] The plasma generating assembly is used to generate plasma;

[0008] The reforming section is used to utilize the plasma generated by the plasma generating assembly to perform a fission and reforming reaction on the reactants entering the reforming section.

[0009] The catalytic section is used to perform secondary fission and reforming reactions on the reformed product entering the catalytic section from the reforming section.

[0010] Preferably, the plasma generating assembly comprises: a first protective shell and a second protective shell connected at the ends; an electrode head is arranged inside the first protective shell, a high-voltage electrode is arranged on the top of the electrode head, an electrode support rod is vertically fixedly arranged on the bottom of the second protective shell through an electrode support rod sleeve, the upper end of the electrode support rod is connected to the electrode head, and the lower end of the electrode support rod extends from the second protective shell to connect to a power supply, an anode cover is arranged at the upper end of the high-voltage electrode and spaced therefrom, an opening is provided in the middle of the anode cover, and the upper end portion of the high-voltage electrode is located in the opening, and a discharge gas inlet for filling gas with an internal pipe opening facing the anode cover is also provided on the outer side of the first protective shell.

[0011] Preferably, the first protective shell and the second protective shell are both cylindrical, and the inner diameter of the first protective shell is greater than the inner diameter of the second protective shell;

[0012] The first protective shell and the second protective shell are fixed together by a fixing plate, and the electrode support rod is arranged through the fixing plate.

[0013] Preferably, the fixing plate and the electrode support rod sleeve are both made of ceramic material, the penetration point between the electrode support rod and the fixing plate and the electrode support rod sleeve are brazed and sealed respectively, and the electrode support rod sleeve is threadedly fixed to the bottom of the second protective shell.

[0014] Preferably, the reforming section comprises: a reforming shell and an inner conduit, wherein both ends of the reforming shell are respectively connected to the catalytic section and the plasma generating assembly through a first connecting flange, the inner conduit is at least partially arranged inside the reforming shell, and a part of it also extends into the interior of the catalytic section, and a feed pipe and an air intake pipe are also arranged on the outer side of the reforming shell and connected to the interior thereof.

[0015] Preferably, the inner side wall of the reforming shell is further provided with an interlayer cavity, the top of the interlayer cavity is connected with the interior of the reforming shell; wherein,

[0016] At least two of the feed pipes are symmetrically arranged on the bottom side of the reforming shell and are respectively connected to the interlayer cavity;

[0017] At least two of the air inlet pipes are symmetrically arranged on the top side of the reforming shell and are respectively connected to the interior of the reforming shell.

[0018] Preferably, the catalytic section comprises: a catalytic shell and a catalyst partition; the interior of the catalytic shell is horizontally divided by a catalyst partition with pores on its surface, the end of the catalytic shell away from the reforming section is connected to an air outlet pipe via a second connecting flange, and the side of the end of the catalytic shell close to the reforming section is connected to the interior thereof with a water inlet pipe.

[0019] Preferably, the opening of the inner conduit inside the catalytic shell is higher than the water inlet pipe and lower than the catalyst partition.

[0020] The inner conduit is evenly provided with through holes on the side surface of the inner conduit which is higher than the diameter of the water inlet pipe;

[0021] The pipe opening of the inner duct located inside the reformer housing is lower than the air intake pipe.

[0022] The present invention also provides a plasma reaction method for reforming hydrocarbon liquid fuel, the method comprising:

[0023] Connecting the gas source to the discharge gas inlet, connecting the electrode support rod to the high-voltage power supply wire, and grounding the first protective shell;

[0024] injecting hydrocarbon liquid fuel and air into the reforming housing by using a feed pipe and an air intake pipe;

[0025] The arc plasma generated by the high voltage electrode is blown into the reforming housing by the gas introduced from the discharge gas inlet to carry out the first step reforming reaction on the injected hydrocarbon liquid fuel and air to produce cracking products and reforming products;

[0026] The cracking products and reforming products are introduced into the catalytic shell by using the inner conduit, and water vapor is introduced into the water inlet pipe to cooperate with the internal catalyst to carry out the second step reforming reaction on the internal reactants;

[0027] The gas generated after the reforming reaction is discharged through the gas outlet pipe.

[0028] Preferably, the flow rate of the gas from the gas source to the discharge gas inlet should be 15-30L / min;

[0029] The feed pipe and the air intake pipe inject hydrocarbon liquid fuel and air into the reforming shell to control the oxygen-carbon ratio to 0.5-2.0 and the water-carbon ratio to 1.0-3.0.

[0030] According to the above technical scheme, the plasma reaction device and reaction method for hydrocarbon liquid fuel reforming provided by the present invention have the following beneficial effects when used: the present invention connects the arc plasma generating assembly with the reforming part, and utilizes the generated non-thermal plasma to feed, mix and reform the liquid fuel inside the cavity, so that the fuel macromolecules are cracked in the high temperature and high chemical activity environment of the non-equilibrium plasma, and undergo partial oxidation reforming and steam reforming reactions, while releasing heat to form a high temperature area in the reforming cavity; the cracking products and the reforming products are further retained in the catalytic cavity through the inner conduit, and if there is catalyst-assisted reforming, more efficient conversion and hydrogen production can be achieved, and with the reaction device structure of the present invention, the sealing is also guaranteed, and the sufficiency of the reforming reaction can be guaranteed.

[0031] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation mode; and the parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 It is a schematic diagram of the internal structure of a plasma reaction device for reforming hydrocarbon liquid fuel provided by the present invention;

[0034] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0035] Figure 3 The present invention provides a flow chart of a plasma reaction for reforming hydrocarbon liquid fuels.

[0036] Description of Reference Numerals

[0037] 1 Catalytic housing 2 Exhaust pipe

[0038] 3 Second connecting flange 4 Water inlet pipe

[0039] 5First connecting flange 6Intake pipe

[0040] 7 interlayer cavity 8 first protective shell

[0041] 9 discharge gas inlet 10 anode cover

[0042] 11 High voltage electrode 12 Electrode head

[0043] 13 fixing plate 14 second protective shell

[0044] 15 Insulation 16 Electrode support sleeve

[0045] 17 electrode support rod 18 feed pipe

[0046] 19 inner conduit 20 reforming shell

[0047] 21 Catalyst separator DETAILED DESCRIPTION

[0048] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0049] In the present invention, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0050] like Figure 1 and Figure 2 As shown, the present invention provides a plasma reaction device for reforming hydrocarbon liquid fuel, the plasma reaction device comprises a catalytic part, a reforming part and a plasma generating component which are connected in sequence; wherein,

[0051] The plasma generating assembly is used to generate plasma;

[0052] The reforming section is used to utilize the plasma generated by the plasma generating assembly to perform a fission and reforming reaction on the reactants entering the reforming section.

[0053] The catalytic section is used to perform secondary fission and reforming reactions on the reformed product entering the catalytic section from the reforming section.

[0054] In the above scheme, when the device is in use, the arc plasma generating assembly is connected to the reforming part, and the generated non-thermal plasma is used to feed, mix and reform the liquid fuel inside the cavity. In this way, the fuel macromolecules are cracked in the high temperature and high chemical activity environment of the non-equilibrium plasma, and partial oxidation reforming and water vapor reforming reactions are carried out, while heat is released to form a high-temperature area in the reforming cavity; the cracking products and the reforming products are further retained in the catalytic cavity through the inner conduit. If there is catalyst-assisted reforming, more efficient conversion and hydrogen production can be achieved. With the reaction device structure of the present invention, the sealing is also guaranteed, and the sufficiency of the reforming reaction can be guaranteed.

[0055] In a preferred embodiment of the present invention, the plasma generating assembly comprises: a first protective shell 8 and a second protective shell 14 connected at the ends; an electrode head 12 is arranged inside the first protective shell 8, a high voltage electrode 11 is arranged on the top of the electrode head 12, an electrode support rod 17 is vertically fixedly arranged at the bottom of the second protective shell 14 through an electrode support rod sleeve 16, the upper end of the electrode support rod 17 is connected to the electrode head 12, and the lower end thereof extends from the second protective shell 14 to connect to the power supply, an anode cover 10 is arranged at the upper end of the high voltage electrode 11 and spaced therefrom, an opening is provided in the middle of the anode cover 10, and the upper end of the high voltage electrode 11 is located in the opening, and a discharge gas inlet 9 for filling gas with an internal pipe opening facing the anode cover 10 is also provided on the outer side of the first protective shell 8. Both the first protective shell 8 and the second protective shell 14 are cylindrical, and the inner diameter of the first protective shell 8 is larger than the inner diameter of the second protective shell 14;

[0056] The first protective shell 8 and the second protective shell 14 are fixed together by a fixing plate 13 , and the electrode support rod 17 is disposed through the fixing plate 13 .

[0057] In the above scheme, the first protective shell 8 and the second protective shell 14 are cylindrical with different inner diameters, and the ends are welded together. The tail of the electrode support rod 17 is pressed against the wire of the high-voltage power supply by nuts, gaskets, etc., and the electrode head 12 and the high-voltage electrode 11 are used to generate arc plasma. Air is blown into the interior through the discharge gas inlet 9 to blow the generated plasma into the reforming chamber to perform fission and reforming reactions on the material.

[0058] The high-voltage electrode 11 and the anode cover 10 cannot touch each other, and at the closest point, the gap between the two is not less than 1mm to ensure normal discharge and the generated arc rotates in the reforming chamber with a certain height; the center of the anode cover 10 has an opening with an inner diameter of not less than 10mm, which is in contact with the top of the first protective shell 8 and extends into the interior of the reforming shell 20. The top of the high-voltage electrode 11 is in the shape of a truncated cone, and the toothed structure below is used for heat dissipation. An insulating part 15 can also be provided in the middle of the second protective shell 14. The insulating part 15 is made of alumina ceramic material, and the overall structure is a cylindrical structure with an outer diameter at both ends larger than the middle, and is coaxially arranged with the high-voltage electrode 11, the anode cover 10 and the first protective shell 8.

[0059] In a preferred embodiment of the present invention, the fixing plate 13 and the electrode support rod sleeve 16 are both made of ceramic material, the electrode support rod 17 and the penetration point of the fixing plate 13 and the electrode support rod sleeve 16 are brazed and sealed respectively, and the electrode support rod sleeve 16 and the bottom of the second protective shell 14 are threadedly fixed.

[0060] In the above scheme, the fixing sleeve 16 is a cylinder with a T-shaped cross section, embedded in the lower part of the insulating member 15, in contact with the electrode support rod 17, and pressed and fixed to the bottom of the second protective shell 14, and then the electrode support rod 17 and the electrode support rod sleeve 16 are fixed by brazing and sealing, so that the electrode support rod sleeve 16 can provide support for the electrode support rod 17 on the one hand, and can also ensure the insulation between the electrode support rod 17 and the second protective shell 14 on the other hand;

[0061] The fixing plate 13 is a ceramic plate, the central opening of which is used to pass the electrode support rod, and is fixed to the electrode support rod by brazing and sealing, which can also achieve the effect of support and insulation.

[0062] In a preferred embodiment of the present invention, the reforming section includes: a reforming shell 20 and an inner conduit 19, the two ends of the reforming shell 20 are respectively connected to the catalytic section and the plasma generating assembly through a first connecting flange 5, the inner conduit 19 is at least partially arranged inside the reforming shell 20, and a part of it also extends into the interior of the catalytic section, and the outer side of the reforming shell 20 is also connected to the interior thereof with a feed pipe 18 and an air intake pipe 6.

[0063] In the above scheme, hydrocarbon liquid fuel and air are injected into the reforming shell 20 by using the feed pipe 18 and the air inlet pipe 6, and the arc plasma generated by the high-voltage electrode 11 is blown into the reforming shell 20 by using the gas introduced from the discharge gas inlet 9, so as to perform the first step reforming reaction on the injected hydrocarbon liquid fuel and air to produce cracking products and reforming products.

[0064] In a preferred embodiment of the present invention, the inner side wall of the reforming shell 20 is further provided with an interlayer cavity 7, and the top of the interlayer cavity 7 is connected to the interior of the reforming shell 20; wherein,

[0065] At least two of the feed pipes 18 are symmetrically arranged on the bottom side of the reforming shell 20 and are respectively connected to the interlayer cavity 7;

[0066] At least two of the air inlet pipes 6 are symmetrically arranged on the top side of the reforming shell 20 and are respectively connected to the interior of the reforming shell 20 .

[0067] In the above scheme, the hydrocarbon liquid fuel is first injected into the interlayer cavity 7 through the feed pipe 18, so that the high temperature of the inner wall of the interlayer cavity 7 can be used to preheat the fuel. The preheated fuel enters the internal reforming cavity of the reforming shell 20 through the top inlet, and the air intake pipe 6 can directly inject air into the reforming cavity to carry out the first step of reforming reaction. This structure can ensure the sufficiency and efficiency of the reaction.

[0068] In a preferred embodiment of the present invention, the catalytic section includes: a catalytic shell 1 and a catalyst partition 21; the interior of the catalytic shell 1 is horizontally divided by a catalyst partition 21 with pores on the surface, the end of the catalytic shell 1 away from the reforming section is connected to an outlet pipe 2 via a second connecting flange 3, and the side of the end of the catalytic shell 1 close to the reforming section is connected to the interior thereof with a water inlet pipe 4.

[0069] In the above scheme, the generated cracking products and reforming products are introduced into the catalytic shell 1 by using the inner conduit 19, and water vapor is introduced into the water inlet pipe 4 to cooperate with the internal catalyst to carry out the second step reforming reaction on the internal reactants.

[0070] In a preferred embodiment of the present invention, the inner conduit 19 is located at a pipe opening inside the catalytic shell 1 higher than the water inlet pipe 4 and lower than the catalyst separator 21.

[0071] The inner conduit 19 is evenly provided with through holes on the side surface which is higher than the diameter of the water inlet pipe 4;

[0072] The opening of the inner duct 19 located inside the reformer housing 20 is lower than the air intake pipe 6 .

[0073] In the above scheme, the structure can ensure that the reactant gas flow mixes with water and has a sufficient residence time in the cavity; at the same time, the position of the nozzle of the inner conduit in the reforming cavity is higher than the feed port to ensure that the reactants pass through the plasma area.

[0074] like Figure 2 As shown, the present invention also provides a plasma reaction method for hydrocarbon liquid fuel reforming, the method comprising:

[0075] Step S101, connecting the gas source to the discharge gas inlet 9, connecting the electrode support rod 17 to the high-voltage power supply wire, and grounding the first protective shell 8;

[0076] Step S102, injecting hydrocarbon liquid fuel and air into the reforming housing 20 by using the feed pipe 18 and the air intake pipe 6;

[0077] Step S103, using the gas introduced from the discharge gas inlet 9 to blow the arc plasma generated by the high voltage electrode 11 into the reforming housing 20, so as to perform the first step reforming reaction on the injected hydrocarbon liquid fuel and air to produce cracking products and reforming products;

[0078] Step S104, using the inner conduit 19 to pass the generated cracking products and reforming products into the catalytic shell 1, passing water vapor into the water inlet pipe 4, and cooperating with the internal catalyst to perform a second step reforming reaction on the internal reactants;

[0079] Step S105 , discharging the gas generated after the reforming reaction through the gas outlet pipe 2 .

[0080] In a preferred embodiment of the present invention, the flow rate of gas introduced from the gas source to the discharge gas inlet 9 should be 15-30L / min; the flow rate of hydrocarbon liquid fuel and air injected into the reforming shell 20 by the feed pipe 18 and the air intake pipe 6 is controlled to have an oxygen-carbon ratio of 0.5-2.0 and a water-carbon ratio of 1.0-3.0.

[0081] When in use, the whole device is placed vertically so that the incoming reactant gas flow reaches the surrounding of the plasma area under the action of gravity. The required reactant flow rate is determined by the fuel processing capacity and the oxygen-carbon ratio and water-carbon ratio. The oxygen-carbon ratio is usually between 0.5-2.0, and the water-carbon ratio is between 1.0-3.0. To ensure the stable operation of the plasma, the discharge gas flow rate should be between 15-30L / min. The remaining gas is the carrier gas, which is mixed with the fuel and water vapor into the cavity. The product after fuel reforming is discharged from the outlet.

[0082] In summary, the plasma reaction device and reaction method for hydrocarbon liquid fuel reforming provided by the present invention can be used alone for liquid fuel reforming or in combination with a catalyst to further improve efficiency. The plasma first opens the chemical bonds of fuel macromolecules, improves catalyst reaction efficiency, and reduces catalyst deactivation. The proposed reaction device can withstand the high temperature generated by the reforming reaction, has good airtightness and high safety, and can achieve long-term stable operation.

[0083] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0084] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0085] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A plasma reaction device for reforming hydrocarbon liquid fuel, characterized in that: The plasma reaction device comprises a catalytic part, a reforming part and a plasma generating component which are connected in sequence; wherein, The plasma generating assembly is used to generate plasma; The reforming section is used to utilize the plasma generated by the plasma generating assembly to perform a fission and reforming reaction on the reactants entering the reforming section. The catalytic section is used to perform secondary fission and reforming reactions on the reformed product entering the catalytic section from the reforming section.

2. The plasma reaction device for reforming hydrocarbon liquid fuel according to claim 1, characterized in that: The plasma generating assembly comprises: a first protective shell (8) and a second protective shell (14) connected at the ends; an electrode head (12) is arranged inside the first protective shell (8); a high-voltage electrode (11) is arranged on the top of the electrode head (12); an electrode support rod (17) is vertically fixedly arranged on the bottom of the second protective shell (14) through an electrode support rod sleeve (16); the upper end of the electrode support rod (17) is connected to the electrode head (12); the lower end of the electrode support rod (17) extends out of the second protective shell (14) to connect to a power source; an anode cover (10) is arranged at the upper end of the high-voltage electrode (11) and spaced therefrom; an opening is provided in the middle of the anode cover (10); the upper end of the high-voltage electrode (11) is located in the opening; and a discharge gas inlet (9) for charging gas is also provided on the outer side of the first protective shell (8), the internal pipe opening of which is opened toward the anode cover (10).

3. The plasma reaction device for reforming hydrocarbon liquid fuel according to claim 2, characterized in that: The first protective shell (8) and the second protective shell (14) are both cylindrical, and the inner diameter of the first protective shell (8) is greater than the inner diameter of the second protective shell (14); The first protective shell (8) and the second protective shell (14) are fixed together via a fixing plate (13), and the electrode support rod (17) is arranged through the fixing plate (13).

4. The plasma reaction device for reforming hydrocarbon liquid fuel according to claim 2, characterized in that: The fixing plate (13) and the electrode support rod sleeve (16) are both made of ceramic material, the electrode support rod (17) and the penetration point of the fixing plate (13) and the electrode support rod sleeve (16) are brazed and sealed respectively, and the electrode support rod sleeve (16) and the bottom of the second protective shell (14) are threadedly fixed.

5. The plasma reaction device for reforming hydrocarbon liquid fuel according to claim 1, characterized in that: The reforming section comprises: a reforming shell (20) and an inner conduit (19); the two ends of the reforming shell (20) are respectively connected to the catalytic section and the plasma generating assembly through a first connecting flange (5); the inner conduit (19) is at least partially arranged inside the reforming shell (20), and a part of it also extends into the inside of the catalytic section; the outer side of the reforming shell (20) is also connected to the inside thereof and is provided with a feed pipe (18) and an air intake pipe (6).

6. The plasma reaction device for reforming hydrocarbon liquid fuel according to claim 5, characterized in that: The inner side wall of the reforming shell (20) is also provided with an interlayer cavity (7), and the top of the interlayer cavity (7) is connected to the interior of the reforming shell (20); wherein, At least two feed pipes (18) are symmetrically arranged on the bottom side of the reforming shell (20) and are respectively connected to the interlayer cavity (7); At least two of the air inlet pipes (6) are symmetrically arranged on the top side of the reforming shell (20), and are respectively connected to the interior of the reforming shell (20).

7. The plasma reaction device for reforming hydrocarbon liquid fuel according to claim 1, characterized in that: The catalytic part comprises: a catalytic shell (1) and a catalyst partition (21); the interior of the catalytic shell (1) is horizontally divided by a catalyst partition (21) with pores on its surface; the end of the catalytic shell (1) away from the reforming part is connected to an outlet pipe (2) via a second connecting flange (3); the side of the end of the catalytic shell (1) close to the reforming part is connected to the interior thereof and a water inlet pipe (4) is provided.

8. The plasma reaction device for reforming hydrocarbon liquid fuel according to claim 5 or 7, characterized in that: The inner conduit (19) is located inside the catalytic housing (1) at a pipe opening higher than the water inlet pipe (4) and lower than the catalyst partition plate (21). The inner conduit (19) is evenly provided with through holes on the side surface of the inner conduit (19) which is higher than the diameter of the water inlet pipe (4); The pipe opening of the inner conduit (19) located inside the reformer housing (20) is lower than the air intake pipe (6).

9. A plasma reaction method for reforming hydrocarbon liquid fuel according to any one of claims 1 to 8, characterized in that: The method comprises: The gas source is connected to the discharge gas inlet (9), the electrode support rod (17) is connected to the high-voltage power supply wire, and the first protective shell (8) is grounded; Injecting hydrocarbon liquid fuel and air into the reforming housing (20) via a feed pipe (18) and an air intake pipe (6); The arc plasma generated by the high voltage electrode (11) is blown into the reforming housing (20) by using the gas introduced from the discharge gas inlet (9) to carry out the first step reforming reaction on the injected hydrocarbon liquid fuel and air to produce cracking products and reforming products; The generated cracking products and reforming products are introduced into the catalytic housing (1) by means of the inner conduit (19), water vapor is introduced into the water inlet pipe (4), and the second step reforming reaction is carried out on the reactants inside in cooperation with the internal catalyst; The gas generated after the reforming reaction is discharged through the gas outlet pipe (2).

10. The plasma reaction method for hydrocarbon liquid fuel reforming according to claim 9, characterized in that: The flow rate of gas introduced from the gas source to the discharge gas inlet (9) should be 15-30L / min; The feed pipe (18) and the air intake pipe (6) inject hydrocarbon liquid fuel and air into the reforming shell (20) at flow rates controlled to achieve an oxygen-carbon ratio of 0.5-2.0 and a water-carbon ratio of 1.0-3.0.

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