A swirl-type micro-charged spray burner using an annular groove to feed liquid

Abstract

The present invention discloses a swirl-type micro-charged spray burner that uses an annular groove to feed liquid. A first gap is formed between the inner wall of the first heat exchange sleeve and the outer wall of the combustion sleeve and the inner sleeve. A second gap is formed between the outer wall of the first heat exchange sleeve and the inner wall of the upper part of the outer sleeve and the inner wall of the second heat exchange sleeve. A third gap is formed between the outer wall of the second heat exchange sleeve and the inner wall of the middle and lower part of the outer sleeve. The liquid inlet pipe connected to the fuel tank passes through the side wall of the outer sleeve, the side wall of the second heat exchange sleeve, the side wall of the first heat exchange sleeve and the outer wall of the inner sleeve in sequence, and is connected to the fuel supply tank. On the one hand, it can fully utilize the heat of the exhaust gas after combustion, and preheat the liquid fuel and air at the same time, thereby improving the atomization effect of the liquid fuel and improving the combustion efficiency. On the other hand, it also strengthens the disturbance of the air, improves the mixing degree of the air and the fuel gas after endothermic evaporation, and improves the uniformity of the temperature distribution in the combustion field.

Description

Technical Field

[0001] The invention relates to the field of micro liquid fuel combustion devices, and in particular to a swirl type micro charged spray burner which utilizes an annular groove to feed liquid. Background Art

[0002] Traditional chemical batteries have disadvantages such as low energy density, short battery life, and large space occupation when providing energy. However, as MEMS (Micro-Electro-Mechanical System, also known as micro-electromechanical system) processing and manufacturing technology becomes increasingly mature, in order to better match the power source requirements of MEMS devices, liquid hydrocarbon fuels with higher energy density have received widespread attention and practical application.

[0003] To ensure that the liquid fuel can burn stably after a rapid evaporation process, charged atomization is usually used to form monodisperse fuel droplets with small particle size.

[0004] Existing micro-burners can generally recycle the heat of exhaust gas to effectively avoid the wet wall effect. However, due to insufficient mixing of fuel and air at the edge of the combustion area and the short residence time of the reactants in the combustion area, the overall temperature distribution of the combustion field is highly uneven, which in turn affects the stable combustion effect.

[0005] In order to reduce the size of the micro burner while increasing the liquid fuel flow rate, a large number of nozzles are usually arranged in a limited space. When the distance between adjacent nozzles is close, the spray areas of adjacent nozzles are likely to overlap, which greatly interferes with the evaporation process of the spray droplets in the overlapping area, ultimately leading to a decrease in combustion efficiency and fuel utilization.

[0006] Therefore, in order to further achieve efficient combustion of liquid fuel in a micro burner, it is necessary to propose a micro burner with reasonable structural design and high combustion efficiency. Summary of the Invention

[0007] In order to solve the above technical problems, the present invention provides a swirl-type micro-charged spray burner that uses an annular groove to feed liquid, which has a more reasonable structure and higher combustion efficiency.

[0008] The technical solution of the present invention is as follows: a swirl-type micro-charged spray burner using an annular groove to feed liquid, comprising an upper cover plate, a lower cover plate, an outer sleeve, an inner sleeve, a combustion sleeve, a cylindrical electrode, a horizontal partition, a guide fan blade, a porous medium cylinder, a first heat exchange sleeve and a second heat exchange sleeve; wherein,

[0009] The upper cover plate and the lower cover plate are sealed at the top and bottom ends of the outer sleeve respectively, and the side walls of the outer sleeve are respectively provided with an intake pipe and an exhaust port, and the intake pipe is located above the exhaust port; the inner sleeve is coaxially located on the inner side of the outer sleeve and its bottom end is sealed on the lower cover plate, and a fuel tank for liquid fuel to flow in and out is provided inside the side wall of the inner sleeve, and the fuel tank is an annular groove with an upper open end and a certain depth, and a liquid inlet pipe is provided on the upper part, and the height of the liquid inlet pipe is higher than the height of the exhaust port; a plurality of nozzles that seal and connect the fuel tank to the inner cavity of the tubular electrode are provided on the inner side wall of the inner sleeve, and the front section of the nozzle is tightly fitted with the tubular electrode, and the tubular electrode is coaxially suspended on the inner side of the inner sleeve, and the tubular electrode is led by a wire. The outlet is connected to the positive electrode of the high-voltage DC power supply; the combustion sleeve is located at the top of the inner sleeve, the inner cavity of the combustion sleeve is connected to the inner cavity of the inner sleeve, and a certain distance is left between the top of the combustion sleeve and the upper cover plate; the horizontal partition is clamped between the inner sleeve and the combustion sleeve, and is used to seal the top of the fuel tank and improve the degree of fuel combustion; an igniter is provided in the inner cavity of the combustion sleeve above the horizontal partition; a fixed straight column coaxial with the combustion sleeve is provided between the horizontal partition and the lower cover plate, and the guide fan blade is rotatably set on the lower part of the outer wall of the fixed straight column; the porous medium cylinder is mounted on the outer wall of the upper middle part of the fixed straight column, and is connected to the negative electrode of the high-voltage DC power supply through a wire, and the top of the porous medium cylinder is in contact with the horizontal partition;

[0010] The first heat exchange sleeve and the second heat exchange sleeve are coaxially spaced and arranged between the inner sleeve and the outer sleeve, and the first heat exchange sleeve is located on the inner side of the second heat exchange sleeve; the upper and lower ends of the first heat exchange sleeve are sealed with the upper cover plate and the lower cover plate respectively, and a first gap is formed between the inner side wall of the first heat exchange sleeve and the outer side walls of the combustion sleeve and the inner sleeve; the lower end of the second heat exchange sleeve is sealed with the lower cover plate, and the upper end of the second heat exchange sleeve is lower than the intake pipe and higher than the exhaust port, and the opening between its upper end and the outer sleeve is sealed on the inner side wall of the outer sleeve between the intake pipe and the exhaust port via the annular upper adjusting sleeve, the top surface of the upper adjusting sleeve is lower than the intake pipe, and the bottom surface of the upper adjusting sleeve is higher than the exhaust port, and a second gap is formed between the outer side wall of the first heat exchange sleeve and the inner side wall of the upper part of the outer sleeve and the inner side wall of the second heat exchange sleeve; a third gap is formed between the outer side wall of the second heat exchange sleeve and the inner side wall of the middle and lower part of the outer sleeve;

[0011] An air flow pipe connecting the inner cavity of the inner sleeve and the second interval is horizontally arranged on the side walls of the lower part of the inner sleeve and the lower part of the first heat exchange sleeve near the lower cover plate; an exhaust gas flow pipe connecting the first interval and the third interval is horizontally arranged on the side walls of the lower part of the first heat exchange sleeve and the lower part of the second heat exchange sleeve; the height of the exhaust gas flow pipe is higher than the height of the air flow pipe, and the height of the air flow pipe is lower than the height of the guide fan blade; the liquid inlet pipe passes through the side wall of the outer sleeve, the side wall of the second heat exchange sleeve, the side wall of the first heat exchange sleeve and the outer side wall of the inner sleeve in sequence, and is connected to the fuel supply tank.

[0012] The swirl-type micro-charged spray burner that uses an annular groove to feed liquid, wherein: an annular outer step-shaped boss is provided at the center position of the upper surface of the lower cover plate, and a fuel recovery channel coaxial with the boss is opened inside the center position of the lower cover plate; the fuel recovery channel includes an upper frustum-shaped flow channel, a connecting channel, a lower frustum-shaped flow channel, a support plate and a fuel recovery pipe; wherein the upper frustum-shaped flow channel is trumpet-shaped, and a small frustum is provided at its center position, and the small frustum is formed by an inverted frustum-shaped upper part and a cylindrical lower part connected as a whole, the top of the inverted frustum-shaped upper part is tightly connected to an annular joint, and the lower end of the fixed straight column is inserted into the annular joint. Inside the head, the top of the fixed straight column is in contact with the horizontal partition, and a pointed protrusion is provided at the center of the lower end surface of the cylindrical lower part; a plurality of support plates are evenly spaced in the upper conical flow channel, and each support plate is vertically connected radially between the inner wall of the upper conical flow channel and the outer wall of the small cone, symmetrically dividing the upper conical flow channel; the lower conical flow channel is in the shape of a trumpet in the same direction as the upper conical flow channel, and the connecting channel is in the shape of a cylindrical hole, and is connected between the upper conical flow channel and the lower conical flow channel, and the outlet of the lower conical flow channel is connected to the fuel supply tank through a fuel recovery pipe, which is used to return the recovered fuel to the fuel supply tank.

[0013] The swirl-type micro-charged spray burner that uses an annular groove to feed liquid, wherein: the guide fan blades include a hub and blades, the hub is composed of a coaxial inner ring and an outer ring, and a plurality of ribs are evenly distributed between the inner ring and the outer ring, each rib is vertically connected between the inner ring and the outer ring along the radial direction of the hub, dividing the inner cavity of the hub into a plurality of fan-shaped gaps; multiple blades are evenly distributed on the outer side wall of the outer ring of the hub; the bottom surface of the hub is in contact with the top surface of the boss, and a set amount of gap is reserved between the end of the blade and the inner side wall of the inner sleeve.

[0014] The swirl-type micro-charged spray burner that uses an annular groove to feed liquid, wherein: the cross-section of the outer side wall of the first heat exchange sleeve is wavy.

[0015] The swirl-type micro-charged spray burner that uses an annular groove to feed liquid is characterized in that: an annular right-angled step-shaped protrusion is arranged laterally inward on the inner side wall of the middle part of the combustion sleeve.

[0016] The swirl-type micro-charged spray burner that uses an annular groove to feed liquid, wherein: a plurality of vertical through grooves are arranged at intervals on the side wall of the cylindrical electrode, the width of the vertical through grooves is adapted to the outer diameter of the front section of the nozzle, the length direction of the vertical through grooves is consistent with the axial direction of the cylindrical electrode, and the upper end of the vertical through grooves extends to the upper part of the cylindrical electrode, and the lower end of the vertical through grooves is connected to the bottom surface of the cylindrical electrode.

[0017] The swirl-type micro-charged spray burner that uses an annular groove to feed liquid, wherein: multiple nozzles are distributed in two layers or three layers along the axial direction of the inner sleeve, and the axis lines of all nozzles intersect perpendicularly with the axis line of the inner wall of the inner sleeve; the nozzles in adjacent upper and lower layers are staggered and cross-arranged.

[0018] The swirl-type micro-charged spray burner that uses an annular groove to inlet liquid, wherein: a first annular lower adjustment sleeve is provided at the bottom of the first interval, the top surface of the first lower adjustment sleeve is higher than the height of the air flow pipe and lower than the height of the exhaust gas flow pipe, and the air flow pipe passes through the first lower adjustment sleeve.

[0019] The swirl-type micro-charged spray burner using an annular groove for liquid inlet, wherein: an annular second lower adjustment sleeve is provided at the bottom of the third interval, and the top surface of the second lower adjustment sleeve is lower than the height of the exhaust gas flow pipe.

[0020] The swirl-type micro-charged spray burner that uses an annular channel to feed liquid, wherein: the horizontal partition is formed by connecting a grid hole sheet and an annular plate, and the annular plate is located on the outer periphery of the grid hole sheet and is used to seal the upper end opening of the fuel tank.

[0021] The present invention has the following advantages over the prior art micro burners:

[0022] 1. The air in the micro-burner of the present invention enters the atomization area at a certain flow rate, and rises in the atomization area in the form of a swirl after being acted upon by the guide blades. Due to the turbulence formed by the enhanced disturbance of the air, the mixing degree of the air and the fuel gas on the same horizontal cross-section of the combustion sleeve is effectively improved compared with the conventional flow that rises directly, making the temperature distribution of the combustion field more uniform; the surface of the grid hole sheet combined with the horizontal partition is coated with Pt-Ni or Pt-Cu catalyst, which accelerates the chemical reaction rate, is conducive to improving the fullness of fuel combustion, and thus improves the combustion efficiency.

[0023] 2. The combustion sleeve of the micro-burner of the present invention has a right-angle step-shaped protrusion, which can improve the stable combustion effect by forming a recirculation zone, so that the burner can work stably and continuously, and prolong the residence time of the mixed gas in the combustion sleeve for more complete combustion. At the same time, it effectively increases the wall temperature of the combustion sleeve and improves the uniformity of the wall temperature distribution.

[0024] 3. The exhaust channel of the micro burner of the present invention is mainly composed of two sections, the first interval and the third interval, and the fuel tank and the air inlet channel are respectively located on both sides of the first interval; when the exhaust gas is discharged, it will pass through the first heat exchange sleeve and the second heat exchange sleeve to exchange heat with the air, and through the inner sleeve to exchange heat with the liquid fuel, which can not only make full use of the heat of the exhaust gas and increase the initial temperature of the air, but also reduce the viscosity of the liquid fuel and improve its atomization effect; when the exhaust gas flows through the third interval, it also increases the wall temperature of the outer sleeve, which has a certain heat preservation effect on the burner, thereby reducing the heat dissipation loss of the burner and ensuring the stability of the liquid fuel in the combustion sleeve during combustion.

[0025] 4. The nozzle components of the micro burner of the present invention are arranged in three parallel layers. Each layer is provided with a number of nozzles, which are evenly distributed in the radial direction and have the same size. This can make full use of the space in the atomization area and help to extend the spray. The nozzles of two adjacent layers are staggered by horizontal rotation 30° to form a cross-row arrangement, so that more nozzles can be opened in a limited space, thereby improving the compactness of the burner structure and avoiding the sprays generated by the two adjacent layers of nozzles from interfering with each other due to overlapping areas. Under the working condition of a large fuel flow rate, it can still be ensured that most of the fuel droplets can move to the surface of the porous medium cylinder or nearby in time to maintain a relatively stable evaporation rate.

[0026] 5. The porous medium cylinder of the micro burner of the present invention is connected to the negative electrode of the high-voltage DC power supply. This structure plays a role in the directionally collecting fuel droplets. At the same time, the top of the porous medium cylinder is in contact with the horizontal partition. Since the porous medium cylinder has good thermal conductivity and heat storage capabilities, it can quickly absorb part of the heat released by the fuel during the combustion process, so that its own temperature is maintained at a higher level, which helps the fuel droplets entering the interior of the porous medium cylinder or near its surface to evaporate at a faster rate, thereby improving the combustion efficiency. When the fuel flow rate is large, a small amount of fuel droplets with larger particle size due to insufficient crushing may appear. They need to absorb more heat when evaporating. If the evaporation process cannot be completed in time, they will return to the fuel supply tank through the fuel recovery flow channel located below the porous medium cylinder to ensure the utilization rate of the liquid fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are for explanatory purposes only and are not intended to limit the scope of the present invention in any way. The shapes and proportional dimensions of the components in the drawings are merely schematic and are used to facilitate understanding of the present invention. They are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0028] Figure 1 1. It is a schematic diagram of the overall structure of an embodiment of a swirl-type micro-charged spray burner of the present invention;

[0029] Figure 2 yes Figure 1 Schematic diagram of the structure in the AA direction;

[0030] Figure 3 yes Figure 1 Schematic diagram of the structure in the middle BB direction;

[0031] Figure 4 It is an enlarged schematic cross-sectional view of the fuel recovery channel used in the swirl-type micro-charged spray burner of the present invention;

[0032] Figure 5 It is an enlarged schematic top view of the horizontal partition used in the swirl-type micro-charged spray burner of the present invention;

[0033] Figure 6 It is an enlarged schematic diagram of the three-dimensional structure of the cylindrical electrode used in the swirl-type micro-charged spray burner of the present invention;

[0034] Figure 7 It is an enlarged schematic top view of the guide blade used in the swirl-type micro-charged spray burner of the present invention;

[0035] Summary of the reference numbers in the figure: 1 - upper cover plate; 2 - lower cover plate; 3 - outer sleeve; 4 - inner sleeve; 5 - cylindrical electrode; vertical through groove 5a; 6 - horizontal partition plate; 7 - combustion sleeve; 8 - air inlet pipe; 9 - exhaust port; 10 - nozzle; 11 - grid hole plate; 12 - annular plate; 13 - first heat exchange sleeve; 14 - second heat exchange sleeve; 15 - first lower adjustment sleeve; 16 - second lower adjustment sleeve; 17 - upper adjustment sleeve; 18 - liquid inlet pipe; 19 - fuel tank; 20 - air flow pipe; 21 - air inlet channel ; 22-exhaust flow pipe; 23-exhaust channel; 24-boss; 25-fuel recovery channel; 26-upper conical flow channel; 27-connecting channel; 28-lower conical flow channel; 29-small frustum; 30-support plate; 31-fuel recovery pipe; 32-fuel supply tank; 33-annular joint; 34-fixed straight column; 35-guide fan blade; 36-porous medium cylinder; 37-hub; 38-blade; 39-igniter; 40-lead; 41-high voltage DC power supply; 42-fuel supply pump. DETAILED DESCRIPTION

[0036] The specific implementation manner and examples of the present invention will be described in detail below with reference to the accompanying drawings. The specific examples described are only used to explain the present invention and are not used to limit the specific implementation manner of the present invention.

[0037] like Figure 1 Combined with Figure 2 and Figure 3As shown, the present invention utilizes a swirl-type micro-charged spray burner with liquid inlet through an annular groove, including an upper cover plate 1, a lower cover plate 2, an outer sleeve 3, an inner sleeve 4, a combustion sleeve 7, a cylindrical electrode 5, a horizontal partition 6, a guide fan blade 35, a porous medium cylinder 36, a first heat exchange sleeve 13 and a second heat exchange sleeve 14.

[0038] The upper cover plate 1 and the lower cover plate 2 are sealed at the top and bottom ends of the outer sleeve 3 respectively. An air inlet pipe 8 and an air outlet 9 are arranged laterally (or horizontally) on the side walls of the outer sleeve 3, and the air inlet pipe 8 is located above the air outlet 9.

[0039] Preferably, a plurality of air inlet pipes 8 are evenly spaced and distributed along the circumference or periphery of the outer sleeve 3 , and the axis lines of all the air inlet pipes 8 intersect the axis line of the outer sleeve 3 at right angles.

[0040] Similarly, a plurality of exhaust ports 9 may be evenly spaced and distributed along the circumference or periphery of the outer sleeve 3 , and the axis lines of all the exhaust ports 9 also intersect perpendicularly with the axis line of the outer sleeve 3 .

[0041] Preferably, the number of the exhaust ports 9 is the same as the number of the intake pipes 8 , and each exhaust port 9 is located directly below the corresponding intake pipe 8 .

[0042] The inner sleeve 4 is coaxially located on the inner side of the outer sleeve 3 and its bottom end is also sealed on the lower cover plate 2. A fuel groove 19 is provided inside the side wall of the inner sleeve 4 for liquid fuel to flow into and spray out. The fuel groove 19 is an annular groove with an upper end opening and a certain depth. A liquid inlet pipe 18 is provided on its upper part. The height of the liquid inlet pipe 18 is higher than the height of the exhaust port 9.

[0043] Preferably, multiple liquid inlet pipes 18 can be evenly spaced along the circumference or periphery of the outer wall of the inner sleeve 4, and the axis lines of all liquid inlet pipes 18 on the inner side of the outer sleeve 3 intersect the axis line of the outer wall of the inner sleeve 4 at right angles.

[0044] Preferably, the number of liquid inlet pipes 18 is the same as the number of air inlet pipes 8 or air outlets 9 , and each liquid inlet pipe 18 is located directly below the corresponding air inlet pipe 8 and directly above the corresponding air outlet 9 .

[0045] A plurality of nozzles 10 are provided on the inner wall of the inner sleeve 4 protruding laterally inward, sealingly connecting the fuel tank 19 to the inner cavity of the cylindrical electrode 5. The front end of the nozzle 10 is tightly fitted with the cylindrical electrode 5, and the cylindrical electrode 5 is coaxially suspended on the inner side of the inner sleeve 4. The cylindrical electrode 5 is connected to the positive pole of the high-voltage DC power supply 41 through a wire, so that each nozzle 10 is positively charged.

[0046] Preferably, multiple nozzles 10 of the same size are evenly spaced along the circumference or periphery of the inner wall of the inner sleeve 4, and the multiple nozzles 10 are distributed in two layers or three layers of upper, middle and lower layers along the axial direction of the inner sleeve 4, and the axis lines of all nozzles 10 intersect the axis line of the inner wall of the inner sleeve 4 at right angles.

[0047] Furthermore, the nozzles 10 of the adjacent upper and lower layers are staggered and cross-arranged. For example, 6 nozzles 10 are evenly distributed on each layer, and the nozzles 10 of the adjacent upper and lower layers are staggered by horizontal rotation of 30°. Thus, through the cross-arrangement, more sufficient expansion space can be provided for the spray formed by the nozzles 10 of the same layer. At the same time, the sprays formed by the adjacent upper and lower layers of nozzles 10 can be avoided from interfering with each other due to overlapping areas, which is more conducive to the stable operation of the micro burner under conditions of large fuel flow.

[0048] The combustion sleeve 7 is located at the top of the inner sleeve 4. The inner cavity of the combustion sleeve 7 is connected to the inner cavity of the inner sleeve 4. A certain interval or distance is left between the top of the combustion sleeve 7 and the upper cover plate 3 for exhaust of combustion gas.

[0049] Furthermore, an annular right-angled step-shaped protrusion is laterally provided inwardly in the middle of the inner wall of the combustion sleeve 7, which is used to extend the residence time of the mixed gas in the combustion sleeve 7 by forming a recirculation zone, so as to increase the wall temperature of the combustion sleeve 7 and improve the uniformity of its wall temperature distribution.

[0050] The horizontal partition clamp 6 is between the inner sleeve 4 and the combustion sleeve 7, and is used to seal the top of the fuel tank 19 and improve the degree of fuel combustion; an igniter 39 is provided in the inner cavity of the combustion sleeve 7 above the horizontal partition 6, and the igniter 39 is connected to an external power supply through a lead 40.

[0051] Preferably, the igniter 39 is located on the axis of the combustion sleeve 7 and close to the horizontal partition 6.

[0052] A fixed straight column 34 coaxial with the combustion sleeve 7 is provided between the horizontal partition 6 and the lower cover plate 2. The outer diameter of the upper and middle part of the fixed straight column 34 is smaller than the outer diameter of the lower part thereof to form a step surface. The guide fan blade 35 is mounted on the lower part of the outer wall of the fixed straight column 34 and can be rotatably arranged; the porous medium cylinder 36 is mounted on the outer wall of the upper and middle part of the fixed straight column 34, and its bottom end is stuck on the step surface of the lower part of the fixed straight column 34, and its top end is in contact with the horizontal partition 6, and the porous medium cylinder 36 is connected to the negative pole of the high-voltage DC power supply 41 through a wire; the injection direction of the nozzle 10 is perpendicular to the outer wall surface of the porous medium cylinder 36.

[0053] Since the temperature of the porous medium cylinder 36 is relatively high and it has strong heat conduction and heat storage capabilities, it can store part of the heat released during the combustion process, while maintaining itself at a relatively high temperature level, so that the fuel droplets inside the porous medium cylinder 36 and near its surface absorb heat and evaporate into fuel gas, which mixes with the rising air vortex and is ignited and burned in the combustion sleeve 7 above the horizontal partition 6.

[0054] When the high-voltage DC power supply 41 is turned on, an electrostatic field is formed between the nozzle 10 and the porous medium cylinder 36. The fuel droplets ejected from the nozzle 10 are broken and atomized into droplets with a smaller particle size. Under the action of the electrostatic field force, the fuel droplet spray moves toward the porous medium cylinder 36 and evaporates at a relatively stable rate inside and near the surface of the porous medium cylinder 36 to form fuel gas, thereby expanding the contact area between the fuel gas and the air.

[0055] The first heat exchange sleeve 13 and the second heat exchange sleeve 14 are coaxially spaced between the inner sleeve 4 and the outer sleeve 3, and the first heat exchange sleeve 13 is located on the inner side of the second heat exchange sleeve 14; the upper and lower ends of the first heat exchange sleeve 13 are sealed with the upper cover plate 1 and the lower cover plate 2 respectively, and a first interval for exhaust is formed between the outer wall of the combustion sleeve 7, the outer wall of the inner sleeve 4 and the inner wall of the first heat exchange sleeve 13.

[0056] The lower end of the second heat exchange sleeve 14 is sealed with the lower cover plate 2, and the upper end of the second heat exchange sleeve 14 is lower than the intake pipe 8 and higher than the exhaust port 9. The opening between the upper end of the second heat exchange sleeve 14 and the outer sleeve 3 is sealed on the inner side wall of the outer sleeve 3 between the intake pipe 8 and the exhaust port 9 via an annular upper adjustment sleeve 17. A second interval for air intake is formed between the outer side wall of the first heat exchange sleeve 13, the inner side wall of the upper part of the outer sleeve 3 and the inner side wall of the second heat exchange sleeve 14; a third interval for exhaust is formed between the outer side wall of the second heat exchange sleeve 14 and the inner side wall of the lower middle part of the outer sleeve 3; the top surface of the upper adjustment sleeve 17 is lower than the intake pipe 8, and the bottom surface of the upper adjustment sleeve 17 is higher than the exhaust port 9, which is used to separate the second interval and the third interval to prevent the air entering from the intake pipe 8 from mixing with the exhaust gas discharged from the exhaust port 9.

[0057] On the side wall of the lower part of the inner sleeve 4 and the lower part of the first heat exchange sleeve 13 near the lower cover plate 2, an air flow pipe 20 is horizontally (or horizontally) arranged to connect the inner cavity of the inner sleeve 4 and the second interval. The air flow pipe 20 passes through the first heat exchange sleeve 13 and the inner sleeve 4. The air intake pipe 8, the second interval and the air flow pipe 20 form an air intake channel 21. The air entering the second interval from the air intake pipe 8 flows through the bottom end of the second interval through the air flow pipe 20 to the bottom end of the inner cavity of the inner sleeve 4, completing the air intake process.

[0058] On the side walls of the lower part of the first heat exchange sleeve 13 and the lower part of the second heat exchange sleeve 14, an exhaust gas flow pipe 22 connecting the first interval and the third interval is arranged horizontally (or horizontally). The exhaust gas flow pipe 22 passes through the first heat exchange sleeve 13 and the second heat exchange sleeve 14. The first interval, the exhaust gas flow pipe 22, the third interval and the exhaust port 9 constitute an exhaust channel 23. The exhaust gas generated after the fuel is burned in the combustion sleeve 7 flows out from the top of the combustion sleeve 7, passes through the first interval, flows through the exhaust gas flow pipe 22 to the third interval and is discharged from the exhaust port 9, completing the exhaust process.

[0059] When the exhaust gas flows through the first interval, it can simultaneously preheat the liquid fuel entering the fuel tank 19 and the air entering the second interval, making full use of the large amount of heat contained in the exhaust gas, improving the atomization effect of the liquid fuel in the fuel tank 19, and thus shortening the time required for the fuel droplets to absorb heat and evaporate; and when the exhaust gas flows through the third interval, in addition to continuing to preheat the air entering the second interval, it can also keep the outer sleeve 3 warm, further reducing heat dissipation losses.

[0060] Better yet, Figure 2 or Figure 3 The cross-section of the outer wall of the first heat exchange sleeve 13 is wavy, so the air entering the second interval can enhance the heat exchange process with the exhaust gas in the first interval under the disturbance of the wavy outer surface of the first heat exchange sleeve 13, so that the air has a higher temperature before entering the combustion sleeve 7, thereby improving the subsequent combustion efficiency.

[0061] The height of the exhaust gas flow pipe 22 is higher than that of the air flow pipe 20 , and the height of the air flow pipe 20 is lower than that of the guide blades 35 .

[0062] Preferably, multiple air flow tubes 20 are evenly spaced along the circumference or periphery of the inner sleeve 4 (and the first heat exchange sleeve 13), and the axis lines of all air flow tubes 20 intersect the axis line of the inner sleeve 4 (and the first heat exchange sleeve 13) at right angles.

[0063] Similarly, multiple exhaust gas flow pipes 22 can be evenly spaced along the circumference or periphery of the first heat exchange sleeve 13 (and the second heat exchange sleeve 14), and the axis lines of all exhaust gas flow pipes 22 intersect the axis line of the first heat exchange sleeve 13 (and the second heat exchange sleeve 14) at right angles.

[0064] Preferably, the number of the exhaust gas flow pipes 22 is the same as the number of the air flow pipes 20 , and each air flow pipe 20 is located directly below its corresponding exhaust gas flow pipe 22 .

[0065] Furthermore, a first annular lower adjustment sleeve 15 is provided at the bottom of the first interval. The top surface of the first lower adjustment sleeve 15 is higher than the height of the air flow pipe 20 and lower than the height of the exhaust gas flow pipe 22. The air flow pipe 20 passes through the first lower adjustment sleeve 15 and is used to adjust the length of the exhaust channel 23 in the first interval to improve combustion efficiency.

[0066] Similarly, a second annular lower adjustment sleeve 16 is provided at the bottom of the third interval, and the top surface of the second lower adjustment sleeve 16 is lower than the height of the exhaust gas flow pipe 22, which is used to adjust the length of the exhaust channel 23 in the third interval to improve combustion efficiency; in addition, the height of the second lower adjustment sleeve 16 cooperates with the height of the first lower adjustment sleeve 15 to jointly adjust the length of the exhaust channel 23.

[0067] The liquid inlet pipe 18 passes through the side wall of the outer sleeve 3, the side wall of the second heat exchange sleeve 14, the side wall of the first heat exchange sleeve 13 and the outer wall of the inner sleeve 4 in sequence, and is connected to the fuel supply tank 32. The liquid inlet pipe 18 and the fuel tank 19 form a liquid inlet channel, and the liquid fuel in the fuel supply tank 32 flows into the fuel tank 19 inside the inner sleeve 4 through the liquid inlet pipe 18.

[0068] Preferably, a plurality of liquid inlet pipes 18 can be evenly spaced along the circumference or periphery of the outer sleeve 3 (the second heat exchange sleeve 14, the first heat exchange sleeve 13 and the outer wall of the inner sleeve 4), and the axial center lines of all liquid inlet pipes 18 intersect perpendicularly with the axial center lines of the outer sleeve 3 (the second heat exchange sleeve 14, the first heat exchange sleeve 13 and the outer wall of the inner sleeve 4).

[0069] Furthermore, a fuel supply pump 42 is provided at the bottom of the fuel supply tank 32 , connected between the fuel supply tank 32 and the liquid inlet pipe 18 , for regulating the flow of liquid fuel in the liquid inlet pipe 18 connected to the fuel supply tank 32 .

[0070] The present invention proposes a swirl-type micro-charged spray burner that uses an annular groove to inlet liquid. On the one hand, it can fully utilize the heat of the exhaust gas after combustion, and preheat the liquid fuel and air at the same time, thereby improving the atomization effect of the liquid fuel and improving the combustion efficiency. On the other hand, it also strengthens the disturbance of the air, improves the mixing degree of the air and the fuel gas after endothermic evaporation, and improves the uniformity of the temperature distribution in the combustion field.

[0071] In the specific embodiment of the present invention, a swirl-type micro-charged spray burner using an annular channel for liquid inlet is used. Figure 1 Combine Figure 4As shown, an annular outer stepped boss 24 is provided at the center of the upper surface of the lower cover plate 2, and a fuel recovery channel 25 coaxial with the boss 24 is opened inside the center of the lower cover plate 2; the fuel recovery channel 25 includes an upper frustum-shaped flow channel 26, a connecting channel 27, a lower frustum-shaped flow channel 28, a support plate 30 and a fuel recovery pipe 31; wherein the upper frustum-shaped flow channel 26 is in the shape of a bell mouth, and a small frustum 29 is provided at its center. The small frustum 29 is formed by an inverted frustum-shaped upper part and a cylindrical lower part connected as one piece, and the top of the inverted frustum-shaped upper part is tightly connected to the annular joint 33. Figure 1 The lower end of the middle fixed straight column 34 is inserted into the annular joint 33, the top of the fixed straight column 34 is in contact with the horizontal partition, and a pointed protrusion is provided at the center of the lower end surface of the cylindrical lower part; a plurality of support plates 30 are evenly spaced in the upper frustum-shaped flow channel 26, and each support plate 30 is vertically connected between the inner wall of the upper frustum-shaped flow channel 26 and the outer wall of the small frustum 29 in the radial direction, symmetrically dividing the upper frustum-shaped flow channel 26; the lower frustum-shaped flow channel 28 is in the shape of a trumpet in the same direction as the upper frustum-shaped flow channel 26, and the connecting channel 27 is in the shape of a cylindrical hole and is connected between the upper frustum-shaped flow channel 26 and the lower frustum-shaped flow channel 28, and the outlet of the lower frustum-shaped flow channel 28 passes through Figure 1 The fuel recovery pipe 31 is connected to the fuel supply tank 32 and is used to return the recovered fuel to the fuel supply tank 32.

[0072] When the fuel flow rate is large, a small number of fuel droplets on the porous medium cylinder 36 may form larger particle sizes due to insufficient breakage, so that they need to absorb more heat when evaporating. If the evaporation process cannot be completed in time, they will return to the fuel supply tank 32 through the fuel recovery channel 25 below the porous medium cylinder 36, thereby improving the utilization rate of the liquid fuel.

[0073] Combine Figure 5 As shown, specifically, the horizontal partition 6 is formed by connecting a mesh sheet 11 and an annular plate 12. The annular plate 12 is located on the periphery of the mesh sheet 11 and is clamped between the mesh sheet 11 and the annular plate 12. Figure 1 between the inner sleeve 4 and the combustion sleeve 7, and is used to seal the upper end opening of the fuel tank 19; preferably, the grid holes on the grid hole sheet 11 are regular hexagons, and the surface of the grid hole sheet 11 is coated with Pt-Ni or Pt-Cu catalyst, which is more conducive to increasing the chemical reaction rate and making the combustion of the fuel gas more complete.

[0074] Combine Figure 6 As shown, specifically, a plurality of vertical through grooves 5a are provided on the side wall of the cylindrical electrode 5 at intervals, and the width of the vertical through grooves 5a is Figure 1The outer diameter of the front section of the nozzle 10 is adapted and is used to be tightly clamped on the front end of the nozzle 10. The length direction of the vertical through groove 5a is consistent with the axial direction of the cylindrical electrode 5, and the upper end of the vertical through groove 5a extends to the upper part of the cylindrical electrode 5, and the lower end of the vertical through groove 5a is connected to the bottom surface of the cylindrical electrode 5.

[0075] Combine Figure 7 As shown, further, the set Figure 1 The rotatable guide blade 35 at the lower end of the outer side wall of the fixed straight column 34 includes a hub 37 and blades 38. The hub 37 is composed of a coaxial inner ring and an outer ring. A plurality of ribs are arranged between the inner ring and the outer ring. Each rib is vertically connected between the inner ring and the outer ring along the radial direction of the hub 37, dividing the inner cavity of the hub 37 into a plurality of fan-shaped gaps, so that the recovered liquid fuel enters the fuel recovery channel 25 through the fan-shaped gaps.

[0076] Multiple blades 38 are evenly distributed on the outer side wall of the outer ring of the hub 37; the bottom surface of the hub 37 is in contact with the top surface of the boss 24, and a small distance or a set gap is left between the end of the blade 38 and the inner side wall of the inner sleeve 4; the air enters the atomization area composed of the nozzle 10, the cylindrical electrode 5 and the porous medium cylinder 36 at a certain flow rate, and rises in the form of a swirl after being disturbed by the guide blades 35, which promotes mixing with the fuel gas formed by endothermic evaporation and improves combustion efficiency.

[0077] The contents not described in detail in this specification belong to the prior art known to ordinary technicians in this field.

[0078] In a specific embodiment, the upper cover plate 1 has a diameter of 38 mm and a thickness of 3 to 5 mm and is made of high-temperature resistant materials such as ceramics. A through hole of 0.5 to 0.8 mm is opened at the center axis of the upper cover plate 1 to lead out the lead 40 of the igniter 39.

[0079] The lower cover plate 2 is square with a side length of 100 mm and a thickness of 8 to 10 mm. It is made of a material with a low thermal conductivity coefficient, such as ceramic. A through hole with a diameter of 0.5 mm is opened at a radial distance of 16 mm from the center axis of the lower cover plate 2 for leading out the wire connecting the cylindrical electrode 5 to the positive pole of the high-voltage DC power supply 41.

[0080] The outer sleeve 3 has an outer diameter of 66 mm, an inner diameter of 60 mm, and a height of 82 mm. It is made of high-temperature resistant materials such as ceramics. Six radially evenly distributed air intake pipes 8 are opened on the side wall 9 to 10 mm away from the top of the outer sleeve 3. Their outer diameters are 3 to 4 mm and their inner diameters are 2 to 3 mm.

[0081] The outer diameter of the inner sleeve 4 is 45 mm, the inner diameter is 35 mm, and the height is 63 mm. A fuel groove 19 is opened 40 mm away from the central axis of the inner sleeve 4, and its width is about 1.5 to 2 mm; three layers of parallel nozzles 10 are provided on the inner wall surface of the inner sleeve 4, and the vertical distance between adjacent upper and lower layers of nozzles 10 is 15 mm. The number of nozzles 10 in each layer is 6, and the inner diameter of all nozzles 10 is 1.0 to 1.2 mm, the outer diameter is 1.3 to 1.6 mm, and the height is 6 mm. The nozzles 10 are made of materials with strong conductivity and certain strength, such as stainless steel; the top layer of nozzles 10 is 15 mm away from the horizontal partition, and the bottom layer of nozzles 10 is 18 mm away from the upper surface of the lower cover plate 2.

[0082] The outer diameter of the horizontal partition 6 is 45 mm and the thickness is 1 to 2 mm. Its annular plate 12 is made of high-temperature resistant and high thermal conductivity materials such as stainless steel; the grid density of its mesh hole sheet 11 is 80 holes / cm2, and the surface of the mesh hole sheet 11 is coated with Pt-Ni or Pt-Cu catalyst; the two side surfaces of the annular plate 12 are seamlessly connected to the top end of the inner sleeve 4 and the bottom end of the combustion sleeve 7 respectively and are sealed.

[0083] The combustion sleeve 7 has an outer diameter of 45 mm, a wall thickness of 1.5 to 2 mm, and a height of 15 mm. It is made of high-temperature resistant thermal insulation materials such as ceramics. It has a ring-shaped right-angled step-shaped protrusion in the middle with a height of 3 to 5 mm.

[0084] The first heat exchange sleeve 13 has an outer diameter of 51 mm, an inner diameter of 48 mm, and a height of 82 mm. There is a gap of 1.5 mm between the inner surface of the first heat exchange sleeve 13 and the outer surface of the inner sleeve 4, ie, a first interval.

[0085] The outer diameter of the second heat exchange sleeve 14 is 57 mm, the inner diameter is 54 mm, and the height is 63 mm. There is a gap of 1.5 mm between the inner surface of the second heat exchange sleeve 14 and the outer surface of the first heat exchange sleeve 13, that is, the second interval; there is a gap of 1.5 mm between the outer surface of the second heat exchange sleeve 14 and the inner surface of the outer sleeve 3, that is, the third interval.

[0086] The inner sleeve 4 , the first heat exchange sleeve 13 and the second heat exchange sleeve 14 are all made of high-temperature resistant materials with high thermal conductivity, such as stainless steel.

[0087] The liquid inlet pipe 18 allows liquid fuel to enter the fuel tank 19 inside the inner sleeve 4 from the fuel supply tank 32. Six through holes with a diameter of 2 to 3 mm are symmetrically opened in the radial direction at a distance of 56 mm from the bottom end of the outer sleeve 3, the first heat exchange sleeve 13, the second heat exchange sleeve 14 and the inner sleeve 4, respectively, so that the liquid inlet pipe 18 can extend therein.

[0088] The air flow pipe 20 allows air to flow into the inner sleeve 3 from the second interval. Six through holes with a diameter of 1 to 2 mm are symmetrically opened in the radial direction 18 mm away from the bottom ends of the first heat exchange sleeve 13 and the second heat exchange sleeve 14 to allow the air flow pipe 20 to extend therein.

[0089] The exhaust gas flow pipe 22 allows the exhaust gas to flow from the first interval to the third interval. Therefore, six through holes with a diameter of 1 to 2 mm are symmetrically opened along the radial direction at a distance of 4 mm from the first heat exchange sleeve 13, the first adjustment sleeve 15 and the bottom end of the inner sleeve 4 to allow the exhaust gas flow pipe 22 to extend therein.

[0090] The cylindrical electrode 5 and the nozzle assembly 10 are both made of highly conductive materials such as stainless steel, and are fitted with an interference fit. The cylindrical electrode 5 is connected to the positive electrode of a high-voltage DC power supply 41 via a lead wire. The voltage of the high-voltage DC power supply 41 is 3 to 10 kV.

[0091] The porous medium cylinder 36 has an outer diameter of 7 to 8 mm and an inner diameter of 2 to 3 mm. It is tightly fitted on the outer surface of the fixed column 34 and connected to the negative electrode of the high-voltage DC power supply 41 through a lead wire.

[0092] An interference fit is adopted between the hub 37 and the fixed straight column 34 , and a gap of 1 to 2 mm is left between the blades 38 and the inner wall surface of the inner sleeve 4 .

[0093] Based on the above-mentioned swirl-type micro-charged spray burner using an annular groove for liquid inlet, the present invention also proposes a combustion method of the swirl-type micro-charged spray burner using an annular groove for liquid inlet, which specifically includes the following steps:

[0094] Connect the cylindrical electrode 5 to the positive electrode of the high-voltage DC power supply 41, and connect the porous medium cylinder 36 to the negative electrode of the high-voltage DC power supply 41. Turn on the high-voltage DC power supply 41 and the fuel supply pump 42.

[0095] Driven by the fuel supply pump 42, liquid fuel enters the fuel tank 19 inside the inner sleeve 4 from multiple symmetrically distributed liquid inlet pipes 18, is preheated by the exhaust channel 23, and then flows into the nozzle 10;

[0096] Air enters the second compartment from multiple symmetrically distributed inlet pipes 8, is fully preheated through the exhaust channel 23, and then enters the atomization area. It then forms a swirl flow through the guide blades 35 and flows upward.

[0097] Under the action of the electrostatic field force, the fuel droplets ejected from the nozzle 10 break up and move toward the surface of the porous medium cylinder 36, then absorb heat and evaporate to form fuel gas, which is fully mixed with the rising air vortex to form a mixed gas;

[0098] The mixed gas passes through the mesh sheet 11 of the horizontal partition 6 and is ignited by the igniter 39, and burns stably in the combustion sleeve 7;

[0099] The exhaust gas generated after combustion simultaneously undergoes sufficient heat exchange with the liquid fuel and air that subsequently flow into the micro-combustor, and is then discharged from the exhaust channel 23, completing the entire combustion process.

[0100] It should be understood that the above description is only a preferred embodiment of the present invention and is not sufficient to limit the technical solutions of the present invention. For ordinary technicians in this field, within the spirit and principles of the present invention, additions, substitutions, changes or improvements can be made according to the above description, and all these additions, substitutions, changes or improvements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A swirl-type micro-charged spray burner using an annular channel for liquid inlet, characterized by: It includes an upper cover plate, a lower cover plate, an outer sleeve, an inner sleeve, a combustion sleeve, a cylindrical electrode, a horizontal partition plate, a guide fan blade, a porous medium cylinder, a first heat exchange sleeve and a second heat exchange sleeve; wherein, The upper cover plate and the lower cover plate are sealed at the top and bottom ends of the outer sleeve respectively, and the side walls of the outer sleeve are respectively provided with an intake pipe and an exhaust port, and the intake pipe is located above the exhaust port; the inner sleeve is coaxially located on the inner side of the outer sleeve and its bottom end is sealed on the lower cover plate, and a fuel tank for liquid fuel to flow in and out is provided inside the side wall of the inner sleeve, and the fuel tank is an annular groove with an upper open end and a certain depth, and an inlet pipe is provided on its upper part, and the height of the inlet pipe is higher than the height of the exhaust port; a plurality of nozzles are provided on the inner side wall of the inner sleeve, which protrude inwardly and seal the fuel tank to the inner cavity of the tubular electrode, and the multiple nozzles are distributed in two layers or three layers along the axial direction of the inner sleeve, and the axis lines of all the nozzles intersect perpendicularly with the axis line of the inner wall of the inner sleeve; the nozzles of adjacent upper and lower layers are staggered and cross-arranged; the front section of the nozzle is tightly fitted with the tubular electrode, and the tubular electrode is coaxially suspended on the inner side of the inner sleeve. , the cylindrical electrode is connected to the positive pole of the high-voltage DC power supply through a wire; the combustion sleeve is located at the top of the inner sleeve, the inner cavity of the combustion sleeve is connected to the inner cavity of the inner sleeve, and a certain distance is left between the top of the combustion sleeve and the upper cover plate; the horizontal baffle is clamped between the inner sleeve and the combustion sleeve, and is used to seal the top of the fuel tank and improve the degree of fuel combustion; the horizontal baffle is formed by connecting a mesh hole sheet and an annular plate, and the annular plate is located on the outer periphery of the mesh hole sheet, and is used to seal the upper end opening of the fuel tank; an igniter is provided in the inner cavity of the combustion sleeve above the horizontal baffle; a fixed straight column coaxial with the combustion sleeve is provided between the horizontal baffle and the lower cover plate, and the guide fan blade is rotatably arranged on the lower part of the outer wall of the fixed straight column; the porous medium cylinder is mounted on the outer wall of the upper middle part of the fixed straight column, and is connected to the negative pole of the high-voltage DC power supply through a wire, and the top of the porous medium cylinder is in contact with the horizontal baffle; The first heat exchange sleeve and the second heat exchange sleeve are coaxially spaced and arranged between the inner sleeve and the outer sleeve, and the first heat exchange sleeve is located on the inner side of the second heat exchange sleeve; the upper and lower ends of the first heat exchange sleeve are sealed with the upper cover plate and the lower cover plate respectively, and a first gap is formed between the inner side wall of the first heat exchange sleeve and the outer side walls of the combustion sleeve and the inner sleeve; the lower end of the second heat exchange sleeve is sealed with the lower cover plate, and the upper end of the second heat exchange sleeve is lower than the intake pipe and higher than the exhaust port, and the opening between its upper end and the outer sleeve is sealed on the inner side wall of the outer sleeve between the intake pipe and the exhaust port via the annular upper adjusting sleeve, the top surface of the upper adjusting sleeve is lower than the intake pipe, and the bottom surface of the upper adjusting sleeve is higher than the exhaust port, and a second gap is formed between the outer side wall of the first heat exchange sleeve and the inner side wall of the upper part of the outer sleeve and the inner side wall of the second heat exchange sleeve; a third gap is formed between the outer side wall of the second heat exchange sleeve and the inner side wall of the middle and lower part of the outer sleeve; An air flow pipe connecting the inner cavity of the inner sleeve and the second interval is horizontally arranged on the side walls of the lower part of the inner sleeve and the lower part of the first heat exchange sleeve near the lower cover plate; an exhaust gas flow pipe connecting the first interval and the third interval is horizontally arranged on the side walls of the lower part of the first heat exchange sleeve and the lower part of the second heat exchange sleeve; the height of the exhaust gas flow pipe is higher than the height of the air flow pipe, and the height of the air flow pipe is lower than the height of the guide fan blade; the liquid inlet pipe passes through the side wall of the outer sleeve, the side wall of the second heat exchange sleeve, the side wall of the first heat exchange sleeve and the outer side wall of the inner sleeve in sequence, and is connected to the fuel supply tank.

2. The swirl-type micro-charged spray burner using an annular channel for liquid inflow according to claim 1, characterized in that: An annular outer step-shaped boss is provided at the center position of the upper surface of the lower cover plate, and a fuel recovery channel coaxial with the boss is opened inside the center position of the lower cover plate; the fuel recovery channel includes an upper frustum-shaped flow channel, a connecting channel, a lower frustum-shaped flow channel, a support plate and a fuel recovery pipe; wherein, the upper frustum-shaped flow channel is in the shape of a trumpet, and a small frustum is provided at its center position, and the small frustum is formed by an inverted frustum-shaped upper part and a cylindrical lower part connected as a whole, and the top end of the inverted frustum-shaped upper part is tightly connected to an annular joint, and the lower end of the fixed straight column is inserted into the annular joint, and the top end of the fixed straight column is connected to the horizontal partition The plates are in contact with each other, and a pointed protrusion is provided at the center of the lower end surface of the cylindrical lower part; a plurality of support plates are evenly spaced in the upper conical flow channel, and each support plate is vertically connected between the inner wall of the upper conical flow channel and the outer wall of the small cone in the radial direction, symmetrically dividing the upper conical flow channel; the lower conical flow channel is in the shape of a trumpet in the same direction as the upper conical flow channel, and the connecting channel is in the shape of a cylindrical hole and is connected between the upper conical flow channel and the lower conical flow channel, and the outlet of the lower conical flow channel is connected to the fuel supply tank through a fuel recovery pipe, which is used to return the recovered fuel to the fuel supply tank.

3. The swirl-type micro-charged spray burner using an annular channel for liquid inflow according to claim 1, characterized in that: The guide fan blades include a hub and blades. The hub consists of a coaxial inner ring and outer ring. A plurality of ribs are distributed between the inner ring and the outer ring. Each rib is vertically connected between the inner ring and the outer ring along the radial direction of the hub, dividing the inner cavity of the hub into a plurality of fan-shaped gaps; a plurality of blades are evenly distributed on the outer side wall of the outer ring of the hub; the bottom surface of the hub contacts the top surface of the boss, and a set gap is reserved between the end of the blade and the inner side wall of the inner sleeve.

4. The swirl-type micro-charged spray burner using an annular channel for liquid inflow according to claim 1, characterized in that: The cross section of the outer side wall of the first heat exchange sleeve is wavy.

5. The swirl-type micro-charged spray burner using an annular channel for liquid inflow according to claim 1, characterized in that: An annular right-angled step-shaped protrusion is laterally arranged inwardly on the inner side wall of the middle part of the combustion sleeve.

6. The swirl-type micro-charged spray burner utilizing an annular channel for liquid inflow according to claim 1, characterized in that: A plurality of vertical through grooves are arranged at intervals on the side wall of the cylindrical electrode. The width of the vertical through grooves is adapted to the outer diameter of the front section of the nozzle. The length direction of the vertical through grooves is consistent with the axial direction of the cylindrical electrode. The upper ends of the vertical through grooves extend to the upper part of the cylindrical electrode, and the lower ends of the vertical through grooves are connected to the bottom surface of the cylindrical electrode.

7. The swirl-type micro-charged spray burner using an annular channel for liquid inflow according to claim 1, characterized in that: An annular first lower adjustment sleeve is provided at the bottom of the first interval. The top surface of the first lower adjustment sleeve is higher than the height of the air flow pipe and lower than the height of the exhaust gas flow pipe. The air flow pipe passes through the first lower adjustment sleeve.

8. The swirl-type micro-charged spray burner utilizing an annular channel for liquid inflow according to claim 1, characterized in that: An annular second lower adjustment sleeve is provided at the bottom of the third interval, and the top surface of the second lower adjustment sleeve is lower than the height of the exhaust gas flow pipe.

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