Liquid fuel multi-stage combustion device

Abstract

The utility model discloses a liquid fuel multi-stage combustion device which comprises an air bellow, a flow guide combined barrel is arranged in a lining barrel of the air bellow, the flow guide combined barrel is formed by combining an air combing flow guide barrel and a conical flow guide seat up and down, a plurality of air grooves are formed in the air combing flow guide barrel in a circumferential distribution mode, and a plurality of air guide grooves are formed in the conical flow guide seat in a circumferential distribution mode. A mixing chamber with a closed bottom is formed between the flow guide combined cylinder and the lining cylinder, and a fuel conveying pipe for spraying fuel towards the mixing chamber is mounted on the lining cylinder; the top of the lining cylinder is connected with a combustion cylinder A in a sealed mode, the combustion cylinder A is sleeved with a fire gathering cylinder, and fire distribution fins are installed on the top of the fire gathering cylinder. According to the utility model, air flow guide of the fan and guide of all air grooves of the air combing guide cylinder are combined, air flow of the conical guide seat takes away vaporific liquid fuel at the bottom of the annular cavity and the cambered surface cylinder, and the vaporific liquid fuel is combusted and guided step by step and discharged, so that the processes of fuel mixing, step-by-step combustion, smoke discharge and the like are orderly realized, and the fuel heat utilization rate and the heat exchange efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuel combustion device, especially to a liquid fuel multistage combustion device. BACKGROUND

[0002] The current liquid fuel stove is mainly electric injection fuel stove in fuel supply mode, and is mainly used in commercial fierce fire stove series of Chinese cooking wok and large pot stove, and has certain use in other kitchen stoves such as steaming box, stewing barrel, steaming stove, pot stove and heater product, adopts pulse oil pump to vaporize fuel oil, and mist liquid fuel can be mixed with air punched by a fan in a stove air cavity to burn, and then mixed gas is ignited by 20,000 volts generated by an ignition needle to burn. Liquid fuel needs to be mixed with air to burn fully, and only relying on the fan to mix can have the following technical problems: first, the air of the fan can take away mist liquid fuel, so that mist liquid fuel is not fully burned, and then fuel utilization rate is low, second, how to make mist liquid fuel burn in stages, and more vaporization of mist liquid fuel is realized in primary combustion, therefore, how to realize multistage and step-by-step combustion of liquid fuel after vaporization is a technical problem to be solved at present, and third, mist liquid fuel is attached in a combustion chamber, and the prior art does not have corresponding air flow guiding structure to realize vaporization of the part of liquid fuel. SUMMARY

[0003] The utility model discloses a liquid fuel multistage combustion device, which combines fan air flow guiding, all air groove guiding of comb wind flow guide cylinder, air flow taking away annular cavity bottom of conical flow guide seat and mist liquid fuel, step-by-step combustion drainage and flue gas discharge of arc surface cylinder, realizes orderly fuel mixing, step-by-step combustion and smoke exhaust process, and improves fuel heat utilization rate and heat exchange efficiency.

[0004] The utility model discloses a liquid fuel multistage combustion device, which combines fan air flow guiding, all air groove guiding of comb wind flow guide cylinder, air flow taking away annular cavity bottom of conical flow guide seat and mist liquid fuel, step-by-step combustion drainage and flue gas discharge of arc surface cylinder, realizes orderly fuel mixing, step-by-step combustion and smoke exhaust process, and improves fuel heat utilization rate and heat exchange efficiency.

[0005] A liquid fuel multistage combustion device, comprising a wind box, the wind box has an inner lining cylinder inside, the inner lining cylinder is internally provided with a flow guide combination cylinder, the flow guide combination cylinder is composed of a comb wind flow guide cylinder and a conical flow guide seat combined upwards and downwards, the comb wind flow guide cylinder is provided with a plurality of air grooves in circumferential distribution, the conical flow guide seat is provided with a plurality of air guide grooves in circumferential distribution, a bottom-closed mixing chamber is formed between the flow guide combination cylinder and the inner lining cylinder, and a fuel delivery pipe for spraying oil towards the mixing chamber is installed on the inner lining cylinder; a combustion cylinder A is sealingly connected to the top of the inner lining cylinder, a plurality of flame heat outlets are formed in the combustion cylinder A, a fire collecting cylinder is sleeved outside the combustion cylinder A, and a fire dividing wing is installed at the top of the fire collecting cylinder.

[0006] In order to better realize the utility model, the conical flow guide base is composed of a wind guide ring-shaped inclined plate and a transverse bottom plate at an angle, the transverse bottom plate is connected with the bottom of the inner lining cylinder, and all the wind guide grooves are circumferentially distributed on the wind guide ring-shaped inclined plate; in all the wind guide grooves, all the wind guide grooves are clockwise wind guide grooves, or all the wind guide grooves are counterclockwise wind guide grooves, or part of all the wind guide grooves are clockwise wind guide grooves and the remaining part are counterclockwise wind guide grooves; the clockwise wind guide grooves are arranged to be inclined to blow air in a clockwise direction, and the counterclockwise wind guide grooves are arranged to be inclined to blow air in a counterclockwise direction.

[0007] Preferably, the polyhedral ceramic sound attenuation cylinder is a porous ceramic sound attenuation cylinder, the air bellow has an air inlet chamber in communication with the inner cavity of the flow guide combination cylinder, the inner cavity of the combustion cylinder A is a combustion chamber B, and a combustion chamber C is formed between the cylinder wall of the combustion cylinder A and the cylinder wall of the porous ceramic sound attenuation cylinder.

[0008] Preferably, the inner lining cylinder is provided with an arc surface cylinder, and the cylinder wall of the arc surface cylinder is in a wave arc surface shape as a whole.

[0009] Preferably, in all the wind grooves of the comb wind flow guide cylinder, all the wind grooves are clockwise wind grooves, or all the wind grooves are counterclockwise wind grooves, or part of all the wind grooves are clockwise wind grooves and the remaining part are counterclockwise wind grooves; the clockwise wind grooves are arranged to be inclined to blow air in a clockwise direction from the inner wall to the outer wall of the comb wind flow guide cylinder, and the counterclockwise wind grooves are arranged to be inclined to blow air in a counterclockwise direction from the inner wall to the outer wall of the comb wind flow guide cylinder.

[0010] Preferably, the porous ceramic sound attenuation cylinder is in a conical shape with a small lower part and a large upper part, a plurality of sound attenuation holes or sound attenuation grooves are arranged on the porous ceramic sound attenuation cylinder, and the inner cavity of the porous ceramic sound attenuation cylinder is provided with a horn-shaped guide inclined surface at the top.

[0011] Preferably, the air bellow is provided with a fan box connected at the bottom, the bottom of the air bellow is provided with an air inlet, and a fan corresponding to the air inlet is arranged in the fan box; the bottom of the fan box is provided with an air inlet filter hole plate, and a pulse oil pump is arranged in the fan box and connected with a fuel delivery pipe.

[0012] Preferably, an extinguishing protection detection needle is arranged in the inner cavity of the comb wind flow guide cylinder, the comb wind flow guide cylinder is provided with a cylinder top plate, a needle passing hole is formed in the center of the cylinder top plate of the comb wind flow guide cylinder, and a detection needle end of the extinguishing protection detection needle passes through the needle passing hole of the cylinder top plate.

[0013] Preferably, the inner lining cylinder is provided with a fuel inlet, the fuel delivery pipe is sealingly arranged in the fuel inlet, an oil outlet end of the fuel delivery pipe is exposed to the fuel inlet and located in a mixing chamber, and the inner lining cylinder is provided with an igniter corresponding to the oil outlet end of the fuel delivery pipe.

[0014] Preferably, the outer surface of the porous ceramic muffler is covered with a refractory insulation layer, and a heat insulation shell is further installed on the outer surface of the porous ceramic muffler, and the bottom of the heat insulation shell is connected with the top of the wind box.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0016] (1) The utility model discloses a primary combustion in the mixing chamber makes liquid fuel vaporization, and after vaporization, fuel and air further mix in the mixing chamber to form an air-fuel mixture, and the air-fuel mixture and flame transmission flow into the inner cavity of the combustion cylinder A to carry out secondary combustion, and then the air-fuel mixture and flame transmission flow into the combustion chamber C of the porous ceramic muffler to carry out tertiary combustion, realizing the operation process of liquid fuel vaporization and tertiary combustion, and the step-by-step combustion also promotes the efficient vaporization of more liquid fuel in the mixing chamber, promotes the sufficient mixing and combustion of vaporized fuel and air, and improves fuel utilization.

[0017] (2) The utility model discloses a combing air flow effect of the combing air flow cylinder, and the air flow after being combed by the combing cylinder enters the mixing chamber to form regular air flow in each half of the clockwise or counterclockwise or clockwise and counterclockwise symmetry, and the regular air flow promotes the sufficient mixing of water mist liquid fuel and air, and the mixing chamber is ignited for the first time to form pre-combustion or primary combustion, and the combustion of the mixing chamber realizes the transmission of the combustion flame to the direction of the split wing, and also realizes the vaporization operation of liquid fuel, which is beneficial to the effective mixing of combustion air and sufficient combustion.

[0018] (3) The utility model discloses a conical guide seat which is composed of a guide air ring-shaped inclined plate and a horizontal bottom plate at an angle to form a triangular ring-shaped cavity at the bottom of the mixing chamber, and the ring-shaped cavity is a part of the cavity at the bottom of the mixing chamber, and the guide air ring-shaped inclined plate is provided with a guide air groove, and after the air at the bottom of the inner cavity of the guide combination cylinder passes through all the guide air grooves, the regular air flow in each half of the clockwise or counterclockwise or clockwise and counterclockwise symmetry is formed in the triangular ring-shaped cavity at the bottom of the mixing chamber, and the regular air flow carries away the mist liquid fuel or fuel-air mixture of the arc surface cylinder and the bottom of the ring-shaped cavity, makes the fuel flow and fully burn, and does not easily adhere to the bottom of the ring-shaped cavity, and the clockwise air flow at the bottom of the ring-shaped cavity also plays a role of guiding the fire to make part of the fire fully vaporize the liquid fuel at the bottom of the ring-shaped cavity.

[0019] (4) The whole of the barrel wall surface of the cambered surface barrel is in a wave cambered surface shape, the cambered surface barrel can fully adhere to the liquid fuel in mist, in the continuous combustion process, the cambered surface barrel effectively increases the area of the adhered liquid fuel, and the liquid fuel in mist is fully vaporized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure sectional view of the liquid fuel multi-stage combustion device of the utility model;

[0021] Figure 2 It is Figure 1 The external three-dimensional structure schematic diagram after the combined fan box;

[0022] Figure 3 It is Figure 2 The sectional structure view;

[0023] Figure 4 It is the sectional view of the flow guide combined barrel installed in the air bellow;

[0024] Figure 5 It is Figure 4 The structure schematic diagram after the cambered surface barrel is removed;

[0025] Figure 6 It is the structure schematic diagram of the cambered surface barrel in the embodiment;

[0026] Figure 7 It is the structure schematic diagram of the porous ceramic silencing barrel in the embodiment;

[0027] Figure 8 It is the structure schematic diagram of the comb wind flow guide barrel in the embodiment;

[0028] Figure 9 It is the overhead direction schematic diagram of the comb wind flow guide barrel in the embodiment, and all wind grooves are evenly arranged as adverse wind grooves;

[0029] Figure 10 It is the schematic diagram of the comb wind flow guide barrel in the embodiment, and the adverse wind grooves and the wind grooves are symmetrically arranged in the fuel entering direction;

[0030] Figure 11 It is the schematic diagram of the flow guide ring-shaped inclined plate arranged with the flow guide groove in the embodiment.

[0031] In the drawings, the names corresponding to the reference signs in the drawings are:

[0032] 1-Blowbox, 11-Air inlet chamber, 12-Inner liner, 2-Guide assembly cylinder, 3-Conical guide seat, 31-Guide annular inclined plate, 311-Guide slot, 32-Transverse bottom plate, 4-Combing guide cylinder, 41-Reverse wind slot, 42-Follow wind slot, 5-Fuel inlet, 51-Fuel delivery pipe, 501-Fuel entry direction, 6-Arc-shaped cylinder, 7-Combustion cylinder A, 71-Flame heat outlet, 8-Porous ceramic silencer, 81-Guide inclined surface, 9-Flame spreader fin, 91-Flame spreader hole, 92-Central boss, 10-Insulation shell, 13-Fire-resistant insulation layer, 14-Fan box, 141-Fan, 15-Flameout protection detection pin. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the embodiments:

[0034] Example

[0035] like Figures 1-11 As shown, a multi-stage combustion device for liquid fuel includes a wind box 1, an inner liner 12 inside the wind box 12, and a flow guide assembly 2 inside the inner liner 12. The flow guide assembly 2 is composed of a combing flow guide 4 and a conical flow guide seat 3 assembled vertically (e.g., Figure 5 , Figure 6 As shown, the air-combing guide cylinder 4 and the conical guide seat 3 of the air-guiding assembly cylinder 2 can be manufactured as a single piece. The air-combing guide cylinder 4 has several air slots distributed circumferentially, and the conical guide seat 3 has several air-guiding slots 311 distributed circumferentially. Figure 5 As shown, the transverse base plate 32 is arranged horizontally, the air guide annular inclined plate 31 is arranged obliquely, and the conical guide seat 3 has a triangular cross-section (the transverse base plate 32 serves as the horizontal base, and the air guide annular inclined plate 31 serves as the inclined surface). The conical guide seat 3 protrudes towards the bottom opening of the air combing guide cylinder 4. The middle of the conical guide seat 3 has a through hole corresponding to the bottom opening of the air combing guide cylinder 4. The transverse base plate 32 and the air guide annular inclined plate 31 will form an annular cavity with a triangular cross-section. The transverse base plate 32 and the inner liner 1 The bottom of the cylinder 2 is connected (the transverse bottom plate 32 extends to the bottom of the inner liner cylinder 12 and is sealed). A mixing chamber is formed between the flow guide cylinder 2 and the inner liner cylinder 12. The bottom of the mixing chamber is closed by the transverse bottom plate 32. The overall height of the inner liner cylinder 12 is higher than the overall height of the flow guide cylinder 2. The top opening of the inner liner cylinder 12 and the top plate of the flow guide cylinder 2 form a space with a height difference, which facilitates the flow of the fuel-air mixture (the mixture of fuel and air after vaporization) toward the inner cavity of the comb flow guide cylinder 4.

[0036] The air guide tube 4 has several air slots distributed circumferentially, and the inner cavity of the air guide tube 4 is connected to the mixing chamber through these air slots. Among all the air slots in the air guide tube 4, this invention can choose from the following three arrangement schemes:

[0037] The first scheme: all the wind slots are downwind slots. Since all the wind slots of the combing wind guide cylinder 4 are downwind slots 42, the air blower blows air into the inner cavity of the combing wind guide cylinder 4, and after passing through all the wind slots (the wind slots play a role of combing and guiding the wind flow, and the wind flow after combing and guiding enters the mixing chamber), a clockwise wind flow is formed. The clockwise wind flow in the mixing chamber is fully mixed with the liquid fuel entering the fuel inlet 5 (or the fuel delivery pipe 51) in succession, and then is uniformly distributed throughout the mixing chamber. During the combustion process, the combing wind guide cylinder 4, the inner lining cylinder 12, and the mixing chamber are all high-temperature environments. After the liquid fuel is sprayed into the mixing chamber by the pulse oil pump (the spray can be in the form of water mist), the liquid fuel vaporizes into a gas in the high-temperature environment of the mixing chamber.

[0038] The second scheme: all the wind slots are upwind slots. Figure 9 As shown in the figure, all the wind slots of the combing wind guide cylinder 4 are upwind slots 41. Since all the wind slots of the combing wind guide cylinder 4 are upwind slots 41, the air blower blows air into the inner cavity of the combing wind guide cylinder 4, and after passing through all the wind slots (the wind slots play a role of combing and guiding the wind flow, and the wind flow after combing and guiding enters the mixing chamber), a counterclockwise wind flow is formed. The counterclockwise wind flow in the mixing chamber is fully mixed with the fuel entering the fuel inlet 5 (or the fuel delivery pipe 51) in succession, and then is uniformly distributed throughout the mixing chamber.

[0039] The third scheme: as shown in the figure, part of the wind slots are downwind slots 42, and the remaining part of the wind slots are upwind slots 41. Figure 8

[0040] In the above three schemes, the downwind slots are inclined outward in a clockwise direction from the inner wall to the outer wall of the combing wind guide cylinder 4, so that the air discharged from the downwind slots 42 of the combing wind guide cylinder 4 forms a clockwise wind, which in turn guides the clockwise wind flow when entering the mixing chamber. The upwind slots are inclined outward in a counterclockwise direction from the inner wall to the outer wall of the combing wind guide cylinder 4, so that the air discharged from the upwind slots 41 of the combing wind guide cylinder 4 forms a counterclockwise wind, which in turn guides the counterclockwise wind flow when entering the mixing chamber.

[0041] The further preferred technical scheme of the third scheme of the present embodiment is as follows: referring to the figure, Figure 10 In all the wind slots, half of the wind slots are downwind slots 42, and the other half of the wind slots are upwind slots 42. Half of the cylinder walls of the combing wind guide cylinder 4 are uniformly provided with upwind slots 41 (i.e., all the upwind slots 41 form a downwind slot unit and are arranged on half of the cylinder walls of the combing wind guide cylinder 4), and the other half of the cylinder walls of the combing wind guide cylinder 4 are uniformly provided with downwind slots 42 (i.e., all the downwind slots 42 form an upwind slot unit and are arranged on half of the cylinder walls of the combing wind guide cylinder 4). In the actual arrangement of the present embodiment, the direction of the fuel entering the fuel inlet 5 is the fuel entering direction 501 (the direction of the arrow in the figure). Figure 10 ​The fuel entering direction 501 enters the fuel into the high-temperature environment to vaporize into a gas body, the fuel inlet 5 is arranged at the junction position of the downwind groove unit and the upwind groove unit, and the fuel entering direction 501 enters the fuel, part of which moves clockwise under the guidance of the downwind flow of the downwind groove unit and is fully mixed, and the other part moves counterclockwise under the guidance of the upwind flow of the upwind groove unit and is fully mixed.

[0042] The bottom-closed mixing chamber is formed between the flow guide combination cylinder 2 and the inner liner cylinder 12, the fuel delivery pipe 51 for spraying oil towards the mixing chamber is arranged on the inner liner cylinder 12, the oil outlet end of the fuel delivery pipe 51 is arranged in the mixing chamber, the fuel delivery pipe 51 delivers liquid fuel or liquid oil (preferably liquid fuel in mist form, which is sprayed and delivered by a pulse oil pump in this embodiment) towards the mixing chamber, and the liquid fuel or liquid oil is ignited and burned in the mixing chamber. The combustion cylinder A7 is sealingly connected to the top of the inner liner cylinder 12, a plurality of flame heat outlets 71 are formed in the combustion cylinder A7, the combustion cylinder A7 is sleeved with a flame collecting cylinder, and the flame collecting fin 9 is arranged on the top of the flame collecting cylinder. The flame collecting cylinder is a porous ceramic sound-absorbing cylinder 8, the wind box 1 has an air inlet chamber 11 which is in communication with the inner cavity of the flow guide combination cylinder 2, the inner cavity of the combustion cylinder A7 is a combustion chamber B, and the combustion chamber C is formed between the cylinder wall of the combustion cylinder A7 and the cylinder wall of the porous ceramic sound-absorbing cylinder 8.

[0043] The wind box 1 has the air inlet chamber 11 which is in communication with the inner cavity of the flow guide combination cylinder 2 (the external air enters the air inlet chamber 11), the fan box 14 is connected to the bottom of the wind box 1, the air inlet is formed in the bottom of the wind box 1, the fan 141 corresponding to the air inlet is arranged in the fan box 14, and the fan 141 continuously supplies the combustion-supporting air into the air inlet chamber 11 of the wind box 1. The bottom of the fan box 14 is an air inlet filter hole plate, the pulse oil pump is arranged in the fan box 14, and the pulse oil pump is connected with the fuel delivery pipe 51.

[0044] As shown in the drawings, Figure 1 The conical flow guide seat 3 is provided with a plurality of wind guide grooves 311 which are in communication with the bottom of the mixing chamber, Figure 11 The conical flow guide seat 3 is provided with a plurality of wind guide grooves 311 which are in communication with the bottom of the mixing chamber,

[0045] The first scheme: all the air guide grooves 311 on the air guide ring-shaped inclined plate 31 are clockwise air guide grooves, the air flow enters the bottom of the inner cavity of the guide-combined cylinder 2, the air flow enters the annular cavity from all the clockwise air guide grooves to form a clockwise air flow, the clockwise air flow carries away the mist liquid fuel or fuel-air mixture on the bottom of the annular cavity and the arc surface cylinder 6, so that the fuel flows and fully burns, and does not easily adhere to the bottom of the annular cavity, and the clockwise air flow on the bottom of the annular cavity also plays a fire guiding role to make part of the fire fully vaporize the liquid fuel on the bottom of the annular cavity.

[0046] The second scheme: all the air guide grooves 311 on the air guide ring-shaped inclined plate 31 are counterclockwise air guide grooves, the air flow enters the bottom of the inner cavity of the guide-combined cylinder 2, the air flow enters the annular cavity from all the counterclockwise air guide grooves to form a counterclockwise air flow, the counterclockwise air flow carries away the mist liquid fuel or fuel-air mixture on the bottom of the annular cavity and the arc surface cylinder 6, so that the fuel flows and fully burns, and does not easily adhere to the bottom of the annular cavity, and the counterclockwise air flow on the bottom of the annular cavity also plays a fire guiding role to make part of the fire fully vaporize the liquid fuel on the bottom of the annular cavity.

[0047] The third scheme: part of the air guide grooves 311 on the air guide ring-shaped inclined plate 31 are clockwise air guide grooves, and the remaining part are counterclockwise air guide grooves. The air guide grooves 311 of the air guide ring-shaped inclined plate 31 in this embodiment are arranged in the third scheme of the combing air guide cylinder 4, half of the air guide grooves 311 are clockwise air guide grooves, and the other half of the air guide grooves 311 are counterclockwise air guide grooves, so that half of the annular cavities form a clockwise air flow, and the other half of the annular cavities form a counterclockwise air flow, which meet and spiral upward to realize fuel flow and full combustion.

[0048] In the above three schemes, the clockwise air guide grooves are arranged to be inclined to blow out in a clockwise direction, and the counterclockwise air guide grooves are arranged to be inclined to blow out in a counterclockwise direction.

[0049] As Figure 3As shown, the inner lining cylinder 12 top sealingly connected with combustion cylinder A7, combustion cylinder A7 on open several flame heat export 71, flame heat export 71 for the combustion cylinder A7 combustion flame, heat and fuel air mixture is transported to the porous ceramic muffler 8 inner cavity in. The combustion cylinder A7 outside is sleeved with the porous ceramic muffler 8, and the inner cavity of the porous ceramic muffler 8 is an acoustic cavity. Since the high-speed flow of the flame and the fuel-air mixture generates noise, the porous ceramic muffler 8 is used for sound attenuation treatment. The porous ceramic muffler 8 of the embodiment is in the shape of a cone with a small lower part and a large upper part. A plurality of sound holes or sound grooves are arranged on the porous ceramic muffler 8. The sound holes are uniformly arranged on the inner wall of the porous ceramic muffler 8. A plurality of sound grooves can be arranged alone or in combination on the inner wall of the porous ceramic muffler 8. The sound grooves can be partially exposed and partially deep into the wall of the porous ceramic muffler 8. The sound grooves can be in the shape of a spiral, an arc or a strip, etc. Figure 7 As shown, the inner cavity of the porous ceramic muffler 8 has a horn-shaped guide slope 81 at the top. The guide slope 81 guides the flame to the flame distribution fin 9, so that the middle part of the flame distribution fin 9 is concentrated, and the outer part is distributed around under the guidance of the guide slope 81. The flame distribution fin 9 is installed at the top of the porous ceramic muffler 8. The flame distribution fin 9 has a plurality of flame distribution holes 91 (for flame distribution) uniformly arranged therein. A center boss 92 is protruded in the middle of the flame distribution fin 9. The center boss 92 also has a plurality of flame distribution holes in different directions for flame distribution according to the design. The inner cavity of the combustion cylinder A7 is a combustion chamber B. The wall of the combustion cylinder A7 and the wall of the porous ceramic muffler 8 form a combustion chamber C.

[0050] As shown in Figure 1 , Figure 4 As shown, the inner wall of the inner lining cylinder 12 is provided with an arc surface cylinder 6, which is attached to the inner wall of the inner lining cylinder 12. Figure 6 As shown, the wall surface of the arc surface cylinder 6 is in the shape of a wave arc surface (or S shape, which can also be other shapes, such as continuous triangular fold). The arc surface cylinder 6 is made of iron-chromium-aluminum material. The arc surface cylinder 6 can fully adhere to the liquid fuel in the form of mist, so that the liquid fuel in the form of mist is fully vaporized during continuous combustion (the arc surface cylinder 6 effectively increases the area of the adhered liquid fuel).

[0051] As shown in Figure 1As shown, the flameout protection probe 15 is installed in the inner cavity of the combing wind guide cylinder 4, the combing wind guide cylinder 4 has a cylinder top plate, the center of the cylinder top plate of the combing wind guide cylinder 4 is provided with a needle passing hole, and the probe end of the flameout protection probe 15 passes through the needle passing hole of the cylinder top plate. The probe end of the flameout protection probe 15 is arranged in the space between the top of the combing wind guide cylinder 4 and the combustion cylinder A7, and performs flameout temperature detection and emergency protection functions. When the flameout protection probe 15 detects flameout, the pulse oil pump and the fan 141 and other components are immediately turned off or re-ignition operation is performed by the igniter. The inner lining cylinder 12 is provided with a fuel inlet 5, the fuel delivery pipe 51 is sealingly installed in the fuel inlet 5, the oil outlet end of the fuel delivery pipe 51 is exposed to the fuel inlet 5 and located in the mixing chamber; the inner lining cylinder 12 is provided with an igniter corresponding to the oil outlet end of the fuel delivery pipe 51, and the igniter performs ignition operation after the fuel is output through the pipe opening of the fuel delivery pipe 51.

[0052] As shown in the drawings, Figure 1 The outer surface of the porous ceramic sound-absorbing cylinder 8 is covered with a refractory insulation layer 13 (which effectively prevents heat loss), and the outer surface of the porous ceramic sound-absorbing cylinder 8 is also provided with an insulation shell 10, and the bottom of the insulation shell 10 is connected with the top of the wind box 1.

[0053] In use, the utility model is mainly used for liquid fuel (of course, it can also be used for gaseous fuel), the liquid fuel is stored in the fuel tank, the fuel delivery pipe 51 (under the power output of the pulse oil pump) sprays the liquid fuel in the fuel tank into the mixing chamber in the form of water mist, and the igniter is used for igniting the liquid fuel in the form of water mist. The fan 141 blows air into the wind box 1 through the air inlet, the air is collected in the inner cavity of the guide combination cylinder 2, the main body of the guide combination cylinder 2 is the combing wind guide cylinder 4, the bottom of the combing wind guide cylinder 4 is the conical guide seat 3, and the inner cavity of the guide combination cylinder 2 is full of air with a certain pressure. The air at the bottom of the inner cavity of the guide combination cylinder 2 enters the annular cavity at the bottom of the mixing chamber through the guide grooves 311 of the conical guide seat 3 and forms a certain regular air flow (any one of the three ways, and the air flow of the third way is preferred in this embodiment), the air flow carries away the mist liquid fuel or fuel-air mixture at the bottom of the annular cavity and the arc surface cylinder 6, so that the fuel flows and fully burns, and is not easily attached to the bottom of the annular cavity, and the air flow at the bottom of the annular cavity also plays a role of guiding the fire, so that part of the fire fully vaporizes the liquid fuel at the bottom of the annular cavity.

[0054] The air in the upper part of the inner cavity of the guide combination cylinder 2 passes through each air slot of the combing air guide cylinder 4 and is combed and guided into the required air flow, the air slot plays a role of combing air, the air flow entering the mixing chamber through the combing of the air slot is in a certain rule (the air flow of any one of the three ways, and the third way is preferred in the embodiment), the mixing efficiency of the fuel and the air is enhanced, the mixing is more sufficient, the combed air entering the mixing chamber through the combing air guide cylinder 4 promotes the mixing of the fuel and the air, the fuel and the air after mixing are called air-fuel mixture (including vaporized fuel, water mist liquid fuel, air and the like), the air-fuel mixture is ignited for the first time in the mixing chamber (the first ignition can be called pre-combustion or primary combustion, the preliminary combustion in the mixing chamber can be called combustion chamber A), in the continuous combustion process, the combing air guide cylinder 4 and the inner lining cylinder 12 and the mixing chamber are high-temperature environments, if the fuel entering the mixing chamber is liquid fuel, it is immediately vaporized and transmitted in stages in the instant of entering, the air-fuel mixture enters the combustion chamber B (which can be called secondary combustion) of the combustion cylinder A7, and then enters the combustion chamber C formed between the cylinder wall of the combustion cylinder A and the cylinder wall of the porous ceramic sound-absorbing cylinder for combustion, thereby the air-fuel mixture is sequentially combusted in the combustion chamber A, the combustion chamber B and the combustion chamber C in stages, so that the air-fuel mixture is fully mixed and fully combusted (greatly reducing the emission of toxic gases such as carbon monoxide caused by insufficient combustion, and the full combustion makes the fuel thermal efficiency higher). The combustion flame is transmitted in stages and gathered at the top of the combustion chamber C, and is divided by the dividing fin 9.

[0055] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-stage combustion apparatus for liquid fuel, characterized by: The wind box is internally provided with an inner lining cylinder, and the inner lining cylinder is internally provided with a guide combination cylinder which is combined by a comb wind guide cylinder and a conical guide seat, the comb wind guide cylinder is provided with a plurality of wind grooves which are circumferentially distributed, the conical guide seat is provided with a plurality of wind guide grooves which are circumferentially distributed, the guide combination cylinder and the inner lining cylinder form a bottom-closed mixing chamber, and the inner lining cylinder is provided with a fuel delivery pipe which sprays oil to the mixing chamber; the top of the inner lining cylinder is sealingly connected with a combustion cylinder A, the combustion cylinder A is provided with a plurality of flame heat outlets, the combustion cylinder A is externally provided with a flame gathering cylinder, and the top of the flame gathering cylinder is provided with a flame dividing wing.

2. A liquid fuel multi-stage combustion apparatus according to claim 1, wherein: The conical guide seat is composed of a wind guide annular inclined plate and a transverse bottom plate at an angle, the transverse bottom plate is connected with the bottom of the inner lining cylinder, and all the wind guide grooves are circumferentially distributed on the wind guide annular inclined plate; all the wind guide grooves are clockwise wind guide grooves, or all the wind guide grooves are counterclockwise wind guide grooves, or part of the wind guide grooves are clockwise wind guide grooves and the remaining part are counterclockwise wind guide grooves; the clockwise wind guide grooves are arranged to be inclined to blow wind in a clockwise direction, and the counterclockwise wind guide grooves are arranged to be inclined to blow wind in a counterclockwise direction.

3. A multi-stage combustion apparatus for liquid fuel as claimed in claim 1 wherein: The flame gathering cylinder is a porous ceramic sound reduction cylinder, the wind box is provided with an air inlet chamber which is communicated with the inner cavity of the guide combination cylinder, the inner cavity of the combustion cylinder A is a combustion chamber B, and the cylinder wall of the combustion cylinder A and the cylinder wall of the porous ceramic sound reduction cylinder form a combustion chamber C.

4. A liquid fuel multi-stage combustion apparatus according to claim 1, wherein: The inner wall of the inner lining cylinder is provided with an arc surface cylinder, and the cylinder wall of the arc surface cylinder is in a whole wave arc surface shape.

5. A liquid fuel multi-stage combustion apparatus according to claim 1, wherein: In all the wind grooves of the comb wind guide cylinder, all the wind grooves are wind grooves, or all the wind grooves are reverse wind grooves, or part of the wind grooves are wind grooves and the remaining part are reverse wind grooves; the wind grooves are arranged to be inclined to blow wind in a clockwise direction from the inner wall to the outer wall of the comb wind guide cylinder, and the reverse wind grooves are arranged to be inclined to blow wind in a counterclockwise direction from the inner wall to the outer wall of the comb wind guide cylinder.

6. A liquid fuel multi-stage combustion apparatus according to claim 3, wherein: The porous ceramic sound reduction cylinder is in a conical shape which is small at the bottom and large at the top, a plurality of sound reduction holes or sound reduction grooves are arranged on the porous ceramic sound reduction cylinder, and the inner cavity of the porous ceramic sound reduction cylinder is provided with a trumpet-shaped guide inclined surface at the top.

7. A liquid fuel multi-stage combustion apparatus according to claim 1, wherein: The bottom of the wind box is connected with a fan box, the bottom of the wind box is provided with an air inlet, and the fan box is provided with a fan which is correspondingly arranged in the fan box; the bottom of the fan box is an air inlet filter hole plate, the inner part of the fan box is provided with an impulse oil pump which is connected with the fuel delivery pipe.

8. A liquid fuel multi-stage combustion apparatus according to claim 1, wherein: The inner cavity of the comb wind guide cylinder is provided with an extinguishing protection detection needle, the comb wind guide cylinder is provided with a cylinder top plate, the center of the cylinder top plate is provided with a needle passing hole, and the detection needle end of the extinguishing protection detection needle passes through the needle passing hole of the cylinder top plate.

9. A liquid fuel multi-stage combustion apparatus according to claim 1, wherein: The inner lining cylinder is provided with a fuel inlet, the fuel delivery pipe is sealingly arranged in the fuel inlet, the oil outlet end of the fuel delivery pipe is exposed from the fuel inlet and located in the mixing chamber, and the inner lining cylinder is provided with an igniter which is correspondingly arranged with the oil outlet end of the fuel delivery pipe.

10. A liquid fuel multi-stage combustion apparatus according to claim 3, wherein: The outer part of the porous ceramic sound reduction cylinder is externally covered with a fireproof heat preservation layer, and the outer part of the porous ceramic sound reduction cylinder is externally provided with a heat preservation shell, and the bottom of the heat preservation shell is connected with the top of the wind box.

Images