WO2013029404A1 - Burner - Google Patents

Abstract

A burner comprises a housing (1), a burning chamber (2) accommodated in the housing (1), an ignition rod (3) installed in the housing (1), and a fuel delivery mechanism (4) passing through the housing (1) and communicated into the burning chamber (2). The burning chamber (2) comprises a first burning area (21) communicated with one end of a feed pipe (40) in the housing (1), a second burning area (22) adjacent to the first burning area (21), and a third burning area (23) adjacent to the second burning area (22) and communicated with a rear opening (14) on the housing (1). The burner can reduce the blocking of the fuel, avoid slag formation, enhance the burning efficiency and effectively prevent backfire.

Description

 High performance burner Technical field

 BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to the field of biomass fuel energy utilization equipment, and more particularly to a burner capable of improving the combustion performance of a biofuel stove.

Background technique

Energy utilization technologies for biomass fuels such as straw, wood chips, and crop straw are a new type of energy solution, and their equipment is gradually being improved and refined. The most critical component in biomass fuel utilization equipment is the burner, which is related to important properties such as energy efficiency, safety, soot, ash, and fuel slagging.

 The inventor of the utility model in China CN201903077 A combustion chamber of a stove using biomass fuel is disclosed in 'a combustion chamber'. The combustion chamber includes a combustion chamber and a fuel feed tube. The combustion chamber has a bottom surface and two sides, the bottom surface is a flat surface, and the two sides extend in parallel and are adjacent to the bottom surface. 135 The angle of °. An ignition rod mounting hole is opened on the bottom surface, and the length of the ignition rod mounting hole extends substantially in accordance with the movement of the fuel. The feed pipe is provided with a plurality of air inlet holes communicating with the air inlet box, and the air inlet holes are substantially perpendicular to the pipe wall of the feed pipe.

There is still room for improvement in the performance of such a combustion chamber during actual use. First, the bottom surface, which is substantially in the form of a horizontal plane, creates a large resistance to the movement of the fuel, which causes the fuel near the outlet of the feed tube to become congested, resulting in insufficient contact air, thereby generating soot and slagging. Congestion of fuel near the outlet of the feed port can also cause fuel upflow in this area, posing a hazard. Secondly, there is a problem in the air supply mode in which the main combustion zone upstream of the fuel moving in the combustion tank and the downstream secondary combustion zone are uniformly supplied with air, and the amount of air supply required for the main combustion zone can be satisfied for the secondary combustion zone which is almost completed for energy conversion. There is a problem of excessive air volume. Excessive air volume in the secondary combustion zone will cause ash. Thirdly, the plurality of holes provided in the feeding pipe and the air inlet holes perpendicular to the wall of the feeding pipe are not perfect for preventing the flame from flowing into the feeding pipe, that is, preventing tempering. In the actual use process, it is found that this structural design is not easy to achieve the purpose of anti-tempering.

technical problem

One technical problem to be solved by the present invention is to provide a burner for use in a biofuel stove that is capable of moving fuel more smoothly.

Another technical problem to be solved by the present invention is to provide a burner for use in a biofuel stove that does not cause fuel flooding near the outlet of the feed port.

Another technical problem to be solved by the present invention is to provide a burner for use in a biofuel stove, which can realize differential supply of air to the primary and secondary combustion zones.

 One technical problem to be solved by the present invention is to provide a burner for use in a biofuel stove that is effective in preventing tempering.

Technical solution

 In order to solve the above technical problems, the present invention provides The outer casing has a bottom surface, two side panels extending upwardly from the bottom surface, an upper opening opposite the bottom surface, a front panel extending upwardly from the bottom surface, and a rear opening opposite the front panel. An ignition rod mounting hole is respectively disposed on the side plate. An air supply opening is opened below the front panel near the bottom surface. The fuel delivery mechanism includes a feed tube that passes through the front plate and a rotatably coupled fuel auger rod that is received in the feed tube. A feeding window is opened on the pipe wall outside the outer casing of the feeding pipe, the inner portion of the outer casing has a discharge opening, and a plurality of feeding pipe air blowing holes arranged at least one turn are opened on the pipe wall, each entering The holes of the feed pipe of the material pipe are inclined in the direction of the combustion chamber. The combustion chamber includes a first combustion zone in communication with the inner end of the outer casing of the feed pipe, a second combustion zone immediately adjacent the first combustion zone, a second combustion zone immediately adjacent to the rear opening of the outer casing Third combustion zone. The first combustion zone includes a substantially horizontal first bottom plate, two inclined first side plates, a first front plate extending upward from the first bottom plate, and a first upper opening opposite the first bottom plate. The discharge port passes through the first front plate such that the feed tube is in communication with the first combustion zone. The distance between the two first side plates is substantially the same as the width of the discharge opening at the discharge opening, and gradually increases in width from the first combustion zone to the second combustion zone. An ignition rod window perpendicular to the feeding tube is opened on the first bottom plate, and at least one row of air screen air blowing holes is opened on the first bottom plate at a position between the ignition rod window and the discharging opening. The second combustion zone includes a second bottom plate extending obliquely downward along the first bottom plate and a second upper opening opposite the second bottom plate. The third combustion zone includes a third bottom plate, a front riser extending upward from the third bottom plate to the second bottom plate, a rear riser extending downward from the third bottom plate to the bottom surface, and a third opposite the third bottom plate Three openings above. A front upper cover plate is disposed between the front plate and the first front plate, and a side upper cover plate is disposed between each of the first side plates and each of the side plates on the same side. The front plate is further provided with a wind dividing plate extending into the outer casing. The air dividing plate comprises a horizontal portion and an upper inclined portion, and the horizontal portion traverses the air blowing opening, so that the area above the horizontal portion of the entire air blowing opening is about Area below the horizontal part 2 In multiples, one free end of the upper inclined portion points to the joint between the first bottom plate and the second bottom plate. In the direction of the lower end of the ignition rod toward the air supply opening, there is a windshield fixed on the first bottom plate. A second side plate capable of withstanding high temperature is provided on each side of the second combustion zone. A lower inclined pressing plate is fixed on the discharge port of the first front plate.

Beneficial effect

 The beneficial effects brought by the present invention include, first, Compared with the conventional venting holes perpendicular to the pipe wall, the strong winds coming out from any two of the opposite inclined feeding ducts no longer collide with each other, canceling each other and maximizing the strength. Wind screens have a significant increase in the ability to prevent tempering. Second, since the distance between the two first side plates is substantially the same as the width of the discharge opening at the discharge opening, the joint between the two sides of the discharge opening and the side plate is compared with the conventional parallel side plate structure. There is no dead space where fuel is not easily pushed by subsequent fuels. The fuel combustion efficiency can be improved and the slagging phenomenon can be reduced. Third, the fuel burned in the first combustion zone only needs a shorter burning time and a smaller amount of air to release most of the remaining energy, and the downwardly inclined second bottom plate can alleviate the fuel pair in this area. Congestion of fuel in the first combustion zone can also accelerate the speed of fuel in this area. The combustion efficiency and slagging phenomenon can be further improved. Fourth, the fuel burned in the second combustion zone will still have a small amount of energy available for combustion. When the fuel is subjected to gravity and falls on the third floor, the remaining energy can be released in the third combustion zone. At the same time, the ash does not affect the fuel in the first and second combustion zones. The combustion efficiency and slagging phenomenon are maximally improved. Fifth, due to the existence of the wind deflector, The majority of the 2/3 flow is used to supply the feed pipe air supply hole, the wind screen air supply hole and the first combustion zone, which require strong wind and a large amount of oxygen, and account for about 1/3. The small portion of the flow is used to supply the second and third combustion zones that require only a small amount of oxygen. This avoids the insufficient combustion of the front combustion zone in the conventional average air supply, and the excessive supply of wind in the rear combustion zone. Sixth, the presence of the lower slanting plate effectively suppresses the fuel overflow phenomenon that is easily generated at the first combustion zone, and reduces the danger in the use of the burner.

DRAWINGS

 1 is a perspective view of a preferred embodiment of the present invention.

 2 is another perspective view of the embodiment shown in FIG. 1.

 FIG. 3 is a schematic exploded view of the embodiment shown in FIG. 1. FIG.

 Figure 4 is a side elevational view of the embodiment of Figure 1.

 Figure 5 is a cross-sectional view taken along the line A-A in Figure 4.

 Figure 6 is a top plan view of the embodiment of Figure 1.

 Figure 7 is a cross-sectional view taken along line B-B of Figure 6. as well as,

 Figure 8 is a partial enlarged view of the portion C in Figure 5.

BEST MODE FOR CARRYING OUT THE INVENTION

 Refer to Figure 1, Figure 2 and Figure 3 It shows a preferred embodiment of a high performance burner for use in a biofuel stove of the present invention. The burner comprises a casing 1 , a combustion chamber 2 housed in the casing 1 , and a casing 1 The inner ignition rod 3 and a fuel delivery mechanism 4 that communicates through the outer casing 1 into the combustion chamber 2.

 The outer casing 1 has a bottom surface 10, two side plates 11 and 11' extending upward from the bottom surface 10, one and the bottom surface 10 The opposite upper opening 12, a front plate 13 extending upward from the bottom surface 10, and a rear opening 14 opposite the front plate 13. Side panels 11 , 11 'The upper one is provided with an ignition rod mounting hole 110, 110'. An air supply port 130 is opened at the bottom of the front plate 13 near the bottom surface 10, and the air duct of the air blower (not shown) can be connected to the air supply port. 130, blasting into the outer casing 1.

 With further reference to Figures 5 and 7, the fuel delivery mechanism 4 includes a feed tube 40 that passes through the front plate 13 of the outer casing 1. And a rotatable fuel auger rod 41 housed in the feed tube 40. a feeding window 42 is opened on the pipe wall of the outer part of the upper casing 1 of the feeding pipe 40, and the casing 1 The inner portion has a discharge port 43 and a plurality of feed tube air supply holes 44 arranged in at least one turn are formed in the pipe wall. Referring to Figure 8, the holes of each of the feed pipe blow holes 44 are directed toward the combustion chamber 2 The direction is tilted. The diameter of each of the feed tube air supply holes 44 may be between 3-5 mm, preferably about 3.5 mm; in the preferred embodiment, the feed tube 40 is provided with two feed tubes for the air supply holes. 44 The number of feed ducts 44 that can be included in each turn can be 10-20, preferably 16. The feed tube 40 may have a diameter of between 80 and 100 mm, preferably about 90 Millimeter.

 With further reference to Figure 7, the combustion chamber 2 includes a first combustion zone 21 in communication with one end of the outer casing 1 of the feed pipe 40. A second combustion zone 22 next to the first combustion zone 21, a third combustion zone 23 immediately adjacent the second combustion zone 22 and in communication with the rear opening 14 on the outer casing 1. First combustion zone 21 A first horizontal bottom plate 211, two inclined first side plates 212, 212', a first front plate 213 extending upward from the first bottom plate 211, and a first bottom plate 211 are included. The opposite first upper opening 214. The discharge port 43 passes through the first front plate 213 to allow the feed pipe 40 to communicate with the first combustion zone 21. Two first side plates 212, 212 The distance between the two is substantially the same as the width of the discharge port 43 at the discharge port 43, and gradually increases in width from the first combustion zone 21 toward the second combustion zone 22. The first bottom plate 211 is from the discharge port 43 The length between the second combustion zone 22 may be 80-150 mm, preferably about 120 mm. Referring to FIG. 5 at the same time, the discharge port (43) 20-40 is located on the first bottom plate 211. A millimeter, preferably about 25 mm, is provided with an ignition rod window 215 perpendicular to the feed tube 40. The width of the ignition rod window 215 is about 10 mm, and the length runs through the two first side plates 212, Between 212 '. On the first bottom plate 211, at least one row of air screen air supply holes 216 is opened at a position between the ignition rod window 215 and the discharge port 43.

 The second combustion zone 22 includes a second bottom plate 221 extending obliquely downward along the first bottom plate 211 and a second bottom plate 221 The opposite second upper opening 222. The angle at which the second bottom plate 221 is inclined downward relative to the first bottom plate 211 may be 8 ° -30 °, preferably about 17 °. Third combustion zone 23 A third bottom plate 231, a front riser 232 extending upward from the third bottom plate 231 to the second bottom plate 221, and a rear riser extending downward from the third bottom plate 231 to the bottom surface 10 233 and a third upper opening 234 opposite to the third bottom plate 231. The length of the second bottom plate 221 from the first bottom plate 211 to the front vertical plate 232 may be 60-130 Millimeters, preferably about 100 mm. The front riser 232 can have a height of 80-150 mm, preferably about 120 mm. The third bottom plate 231 is from the front riser 232 to the rear riser 233 The length between the lengths may be 80-150 mm, preferably about 120 mm. The width of the second bottom plate 221, the third bottom plate 231, the front vertical plate 232, and the rear vertical plate 233 may be 80-120 mm, preferably about 100 mm. The first, second, and third upper openings 214, 222, 234 collectively form a flame exit. Ignition rod window on the first bottom plate 211 A plurality of oxygen air blowing holes 217 are also formed between the 215 and the second bottom plate 221, the second bottom plate 221, and the third bottom plate 231. These oxygen blow holes 217 can have a diameter of 2-4 The millimeter is preferably about 3.5 mm.

 A front upper cover 15 is disposed between the front plate 13 and the first front plate 213, and each of the first side plates 212, 212 'A side cover 16 , 16 ' is provided between each side panel 11 , 11 ' on the same side. The bottom surface 10 of the outer casing 1, the side plates 11, 11', the front plate 13, the front upper cover 15 , a side upper cover 16 , 16 ′ and a first front plate 213 of the combustion chamber 2 , a first side plate 212 , 212 ′, a first bottom plate 211 , a second bottom plate 221 , a third bottom plate 231, the front riser 232 and the rear riser 233 together form an blast area 17 . A wind deflecting plate 18 extending into the outer casing 1 and a wind deflecting plate 18 are also fixed on the front plate 13 A horizontal portion 181 and an upper oblique portion 182 are included. The horizontal portion 181 traverses the air supply port 130 such that the horizontal portion of the entire air supply port 130 is 181 The above area is approximately twice the area below the horizontal portion. The free end of the upper inclined portion 182 is directed to the joint between the first bottom plate 211 and the second bottom plate 221 .

 A windshield fixed to the first bottom plate 211 may be provided in the direction of the lower end of the ignition rod 3 toward the air supply port 130. To prevent the strong wind from the air supply port 130 from affecting the ignition. A rear upper cover 19 fixed to the outer casing 1 may be provided at the third upper opening 234, which may be used to move the third combustion zone 23 The heat generated is directed to the first and second combustion zones 21, 22 to increase the utilization of thermal energy. Since the temperature of the second combustion zone 22 is higher, in the second combustion zone 22 A second side plate 223, 223' capable of withstanding high temperatures may be added to both sides to prevent the outer casing 1 from deforming at a high temperature. Second side plate 223, 223 'Can be ceramic or stainless steel sheet. A lower inclined pressing plate 218 is fixed on the discharge port 43 of the first front plate 213. It can effectively prevent fuel from overflowing and increase the safety of burner use.

In use, the user can turn on the power to turn on the switch of the stove, and the granular biofuel (not shown) in the hopper falls into the feeding tube 40 through the feeding window 42 under the action of gravity, and is pushed in the fuel spiral. Rod 41 Pushed through the discharge port 43 into the first combustion zone 21 and falls on the first bottom plate 211. At this time, the ignition rod 3 is energized to become hot, and the fuel is ignited; and the blower passes through the air supply port 130 to the blast area. 17 air supply. The wind above the wind deflector 18 mainly enters the combustion chamber 2 through the feed pipe air supply hole 44, the wind screen air supply hole 216 and the oxygen supply hole 217 on the first bottom plate 211, and the air distribution plate The lower wind enters the combustion chamber 2 mainly through the oxygen supply holes 217 on the second bottom plate 221 and the third bottom plate 231 to provide the required oxygen for combustion of the fuel. Air supply hole from the feed tube 44 And the air screen vent 216 The air entering the combustion chamber 2 can form a strong wind screen that can prevent the fuel from burning, thereby preventing the feed tube 40 The fuel burns inside, the so-called tempering phenomenon. A plurality of inclined feed tube blow holes 44 compared to conventional vent holes that are perpendicular to the tube wall The strong winds coming out of any two of the opposites no longer have a positive conflict, canceling each other out, thus maximizing the formation of a strong wind screen, and the ability to prevent tempering is significantly increased. In addition, due to the two first side plates 212, 212 The distance between the two is substantially the same as the width of the discharge port 43 at the discharge port 43, so that the discharge port 43 is compared with the conventional parallel side plate structure. There is no dead corner where the fuel is not easily pushed by the subsequent fuel at the junction of the two sides and the side plates. The fuel combustion efficiency can be improved and the slagging phenomenon can be reduced. And two first side plates 212, 212 The distance between 'from the first combustion zone 21 to the second combustion zone 22 The directional width is gradually increased, which effectively reduces the friction generated by the side plates when the fuel advances in the conventional parallel side plate structure, the fuel congestion is alleviated, and the combustion efficiency and slagging phenomenon are further improved.

 In the first combustion zone 21 Burned fuel requires only a short burn time and a small amount of air to release most of the remaining energy. The downwardly inclined second bottom plate 221 can reduce the fuel to the first combustion zone in this area. Congestion of internal fuels can also accelerate the speed of fuel in this area. The combustion efficiency and slagging phenomenon can be further improved. In the second combustion zone 22 The burned fuel will still have a small portion of the energy available for combustion. When the fuel is subjected to gravity and falls on the third bottom plate 231, the remaining energy can be in the third combustion zone. The release is completed and the ash does not affect the fuel in the first and second combustion zones 21, 22. The combustion efficiency and slagging phenomenon are maximally improved. Due to the presence of the wind deflector 18, it accounts for about 2/3 Most of the flow rate of the flow is used to supply the feed pipe blower 44, the wind screen blow hole 216 and the first combustion zone 21, which require strong wind and a large amount of oxygen, and account for about 1/3. The small portion of the flow is used to supply the second and third combustion zones that require only a small amount of oxygen. 22, 23 . This avoids the insufficient combustion of the front combustion zone in the conventional average air supply, and the excessive supply of wind in the rear combustion zone. The presence of the lower slanting plate 218 effectively suppresses the first combustion zone 21 The fuel overflow phenomenon that is easy to occur reduces the danger in the use of the burner.

Claims (1)

A high performance burner comprising a housing (1), a combustion chamber (2) housed in the housing (1), and a housing (2) 1) an ignition rod (3), and a fuel delivery mechanism (4) connected to the combustion chamber (2) through the outer casing (1), The outer casing (1) has a bottom surface (10), two side plates (11, 11') extending upward from the bottom surface (10), one and a bottom surface (10) a relatively upper opening (12), a front plate (13) extending upward from the bottom surface (10), and a rear opening (14) opposite the front plate (13), the side plates (11, 11) There is an ignition rod mounting hole (110, 110 ') respectively on the '), and an air supply opening is provided at the bottom of the front plate (13) near the bottom surface (10) (130) ), The fuel delivery mechanism (4) includes a feed tube (40) passing through the front plate (13) and a rotatably received feed tube (40) a fuel auger rod (41), a feeding window (42) is opened on the pipe wall outside the outer casing (1) of the feeding pipe (40), and a discharge port is provided in the inner portion of the outer casing (1) ( 43) and a plurality of feed pipe air supply holes (44) arranged at least one turn are arranged on the pipe wall, and the holes of each feed pipe air supply hole (44) face the combustion chamber (2) ) the direction is tilted, The combustion chamber (2) comprises a first combustion zone (21) communicating with one end of the outer casing (1) of the feed pipe (40), one immediately adjacent to the first combustion zone ( 21) a second combustion zone (22), a third combustion zone immediately adjacent to the second combustion zone (22) and in communication with the rear opening (14) on the outer casing (1) (23) ), The first combustion zone (21) comprises a substantially horizontal first bottom plate (211) and two inclined first side plates (212, 212) '), a first front plate (213) extending upward from the first bottom plate (211), and a first upper opening (214) opposite the first bottom plate (211), a discharge opening (43) Passing through the first front plate (213) to allow the feed tube (40) to communicate with the first combustion zone (21), the distance between the two first side plates (212, 212') at the discharge opening (43) And the width of the discharge port (43) is substantially the same, and the width gradually increases from the first combustion zone (21) to the second combustion zone (22), and a vertical perpendicular to the first bottom plate (211) is opened. Feed pipe 40) an ignition rod window (215), at the position of the first bottom plate (211) between the ignition rod window (215) and the discharge port (43), at least one row of air screen air supply holes (216) ), The second combustion zone (22) includes a second bottom plate (221) extending obliquely downward along the first bottom plate (211) and a second bottom plate (221) a second upper opening (222), The third combustion zone (23) includes a third bottom plate (231) extending upward from the third bottom plate (231) to the second bottom plate (221) a front riser (232), a rear riser (233) extending downwardly from the third bottom plate (231) to the bottom surface (10), and a third upper opening opposite the third bottom plate (231) ( 234), A front upper cover plate (15) is disposed between the front plate (13) and the first front plate (213), and each of the first side plates (212, 212) ') There is a side cover (16, 16 ') between each side panel (11, 11 ') on the same side. The front plate (13) is further provided with a wind deflecting plate (18) extending into the outer casing (1), and the air dividing plate (18) comprises a horizontal portion (181) And an upper inclined portion (182), the horizontal portion (181) traverses the air supply opening (130) such that the entire air supply opening (130) has a horizontal portion (181) The above area is about 2 times the area below the horizontal portion, and one free end of the upper inclined portion (182) points to the first bottom plate (211) and the second bottom plate (221) ) between the joints, At the lower end of the ignition rod (3), in the direction of the air supply opening (130), there is a windshield fixed on the first bottom plate (211) (30) ), a second side plate (223, 223 ') capable of withstanding high temperature is provided on each side of the second combustion zone (22), A lower inclined pressing plate (218) is fixed on the discharge port (43) of the first front plate (213). 2. The high performance burner of claim 1 wherein each of the feed tube blow holes (44) has a diameter of 3-5 Between millimeters, the number of feed ducts (44) included in each turn is 10-20, the diameter of the feed pipe (40) is between 80-100 mm, and the first bottom plate (211) is from the discharge port. ( 43 ) The length between the second combustion zone (22) is 80-150 mm, the ignition rod window (215) is 20-40 mm away from the discharge port (43), and the second bottom plate (221 The angle of inclination downward relative to the first bottom plate (211) is 8 ° -30 °, and the length of the second bottom plate (221) from the first bottom plate (211) to the front vertical plate (232) is 60-130 mm, the height of the front riser (232) is 80-150 mm, and the length of the third bottom plate (231) from the front riser (232) to the rear riser (233) is 80-150 mm, the second bottom plate (221), the third bottom plate (231), the front vertical plate (232), and the rear vertical plate (233) have a width of 80-120 mm, and an oxygen air supply hole ( 217) has a diameter of 2-4 mm. 3. The high performance burner of claim 2 wherein each of the feed tube blow holes (44) has a diameter of about 3.5. Millimeter; the number of feed ducts (44) included in each turn is 16 and the diameter of the feed pipe (40) is about 90 mm. The first bottom plate (211) is discharged from the discharge port (43) to the second. Area( The length between 22) is about 120 mm, the ignition rod window (215) is about 25 mm from the discharge port (43), and the width of the ignition rod window (215) is about 10 Millimeter, the second bottom plate (221) is inclined downward at an angle of about 17 ° with respect to the first bottom plate (211), and the second bottom plate (221) is from the first bottom plate (211) to the front riser (232) The length between them is about 100 mm, the height of the front riser (232) is about 120 mm, and the third bottom plate (231) is from the front riser (232) to the rear riser (233) The length between them is about 120 mm, and the width of the second bottom plate (221), the third bottom plate (231), the front vertical plate (232), and the rear vertical plate (233) is about 100 mm. The oxygen supply hole (217) has a diameter of about 3.5 mm.

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