Forced ventilation self-adaptive premixing adjusting burner head structure

Abstract

The utility model relates to the technical field of burner design, and discloses a forced ventilation self-adaption premixing adjusting burner head structure which comprises a premixing cavity, the premixing cavity is of an integral annular cavity structure, an inlet of the premixing cavity comprises a fuel gas inlet and an air inlet, the right side of the fuel gas inlet is fixedly connected with a fuel gas branch pipe, and the right side of the fuel gas branch pipe is fixedly connected with an air inlet. A fire gathering pipe is arranged on the right side of the fuel gas branch pipe, an air inlet is formed in the inner side of the fire gathering pipe, a fuel gas center pipe assembly is arranged in the premixing cavity, and a mixing section assembly is arranged on the right side of the fuel gas center pipe assembly. Air and fuel gas are premixed in advance, the air and the fuel gas are mixed more uniformly under the action of a flow equalizing plate by adjusting the ratio of the air and the fuel gas, CO is reduced, the combustion efficiency is improved, air inflow in the premixing cavity is intelligently controlled under the action of servo adjustment, manpower is greatly reduced, and automatic adjustment can be carried out along with the change of the external environment; therefore, the combustion is more sufficient, and the generation of nitrogen oxides is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a burner design technical field especially relates to a forced ventilation self -adaptation premixing regulation burner head structure. BACKGROUND

[0002] With the development of society, the environmental problem is increasingly prominent, the international society increasingly pays attention to the influence and consequence brought by environmental pollution, in our country, with the development of economic construction, the environmental problem brought by the large -scale use of fossil energy is particularly prominent, the acid rain, haze etc.

[0003] The burner is the important component part of industrial boiler, is the main equipment of fuel energy release as heat energy, through adopting various structural mode, design a kind of burner head that burns more stable, the NOx emission is lower, it is the problem that is currently urgently needed to solve, on this basis, through various structural mode, realize the intelligent adjustable of burner component, adjust the burner structure by intelligent adjustment scheme, become another demand that we need to solve at present. Therefore, we still need a kind of more reasonable and effective multi-style burner head structure combined with intelligent adjustment scheme to organize combustion and control pollutant emission.

[0004] For this, aiming at the technical problem, the application proposes a forced ventilation self-adaptive premixing regulation burner head structure. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the shortcoming in the prior art, and provides a forced ventilation self-adaptive premixing regulation burner head structure, which premixes air and gas in advance, adjusts the ratio of air and gas, makes the mixture more uniform under the action of the flow distribution plate, reduces the generation of CO, improves the combustion efficiency, intelligently controls the air inlet in the premixing chamber under the servo adjustment, greatly reduces manual work, and can automatically adjust with the change of external environment, makes the combustion more sufficient through the smoke gas entrainment technology, and greatly reduces the generation of nitrogen oxides.

[0006] To achieve the above object, the utility model provides the following technical scheme.

[0007] The application discloses a forced ventilation self-adaptive premixing regulating burner head structure.

[0008] Further, the premixing regulating assembly is mainly powered by a servo actuator which is fixed to a mixing section main pipe through a servo actuator support, the premixing regulating assembly is connected with bevel gears through a rotating shaft, the premixing cavity is internally provided with a connecting shaft which penetrates the mixing section and the premixing cavity and is connected with the bevel gears and spur gears, and the spur gears are engaged with a premixing regulating ring.

[0009] Further, the center pipe assembly is pressed against a center pipe fixing base under the action of a pressing rod, the bottom side is provided with a sealing ring, the center pipe fixing base is fixedly connected with a center pipe at the top end, the top side of the center pipe is welded with a igniting electrode fixing base, the left side is provided with an igniting electrode, the left side of the center pipe is welded with a center pipe adjusting base, the top side is welded with a flame stabilizing disc, the center of the flame stabilizing disc is welded with eight swirler vanes, and square grooves are uniformly distributed at the edges.

[0010] Further, the mixing section assembly is fixedly connected with a flange, the left side of the flange is provided with a furnace mouth connecting flange, the furnace mouth connecting flange is respectively matched with a centrifugal fan and a combustion furnace, the flange is fixedly connected with a mixing section main pipe at the side close to the furnace mouth connecting flange, the right side of the mixing section main pipe is welded with a gas inlet main pipe, the bottom side of the gas inlet main pipe is provided with a hand valve, the gas inlet main pipe is connected with a center pipe adapter section, is welded to a center pipe fixing base and is used for supplying gas to the center pipe and adjusting the gas inlet amount through a main pipe gas inlet hand valve.

[0011] Further, the mixing section main pipe is welded with a conical core pipe inside, and a mixing section gas cavity is formed between the two and is communicated with the gas inlet main pipe.

[0012] Further, the furnace mouth connecting flange is welded with the gas branch pipe and is communicated with the inside of the mixing section gas cavity, and the gas branch pipe is welded with a flame cover outside.

[0013] Further, the premixing cavity is internally provided with an inner cavity, the inner cavity is provided with a flow uniformizing plate for mixing gas and air, the premixing cavity is internally provided with a nozzle, the nozzle adopts a straight jet type nozzle structure, the nozzle is provided with six premixing nozzles and is provided with holes at both sides, and the left side of the premixing nozzle is welded with an ejector pipe one.

[0014] Further, the premixing cavity outer wall welded ejector pipe two is used for ejecting flue gas.

[0015] The utility model has the advantages of the following:

[0016] 1. In the utility model, air and gas are premixed in advance, the ratio of air and gas is adjusted, and the mixture is made more uniform under the action of the flow uniformizing plate, CO generation is reduced, and combustion efficiency is improved.

[0017] 2. In the utility model, air intake in the premixing chamber is intelligently controlled under the action of servo adjustment, manual work is greatly reduced, and automatic adjustment can be performed according to changes in the external environment.

[0018] 3. In the utility model, flue gas suction technology is used to make combustion more complete, and nitrogen oxide generation is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A structural schematic sectional view of a forced ventilation self-adaptive premixing adjustment burner head structure is provided for the utility model;

[0020] Figure 2 An isometric side half sectional view of a forced ventilation self-adaptive premixing adjustment burner head structure is provided for the utility model.

[0021] LEGEND:

[0022] 1. Premixing cavity; 11. Premixing nozzle; 12. Ejector pipe one; 13. Gas inlet; 14. Air inlet; 15. Premixing chamber; 16. Flow uniformizing plate; 17. Ejector pipe two; 2. Premixing adjustment assembly; 21. Servo actuator; 22. Rotation shaft; 23. Bevel gear set; 24. Straight gear; 25. Premixing adjustment ring; 26. Connecting shaft; 27. Servo actuator support; 3. Gas center pipe assembly; 31. Center pipe mounting column; 32. Center pipe; 33. Ignition electrode fixing seat; 34. Ignition electrode; 35. Flame stabilizing disc; 4. Peripheral gas branch pipe; 5. Fire collecting pipe; 6. Mixing section assembly; 61. Mixing section main pipe; 62. Gas air inlet main pipe; 63. Hand valve; 64. Center pipe adapter section; 65. Main pipe air inlet hand valve; 66. Fan connecting flange; 67. Furnace mouth connecting flange; 68. Center pipe fixing seat; 69. Mixing section gas chamber; 7. Pressing rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] With reference to Figure 1 The utility model provides an embodiment: a kind of forced ventilation self-adapting premixing regulating combustor head structure, including premixing cavity 1, premixing cavity 1 adopts whole ring cavity structure, premixing cavity 1 entrance includes gas inlet 13 and air inlet 14, gas inlet 13 right side is fixedly connected with gas branch pipe 4, gas branch pipe 4 right side is provided with fire pipe 5, air inlet is opened in the inboard of fire pipe 5, premixing cavity 1 inside is provided with gas center pipe assembly 3, gas center pipe assembly 3 right side is provided with mixing section assembly 6, mixing section assembly 6 bottom side is provided with premixing regulating assembly 2, premixing cavity 1 inside is provided with premixing chamber 15.Premixing cavity 1 inside is opened with inner chamber, and inner chamber is equipped with flow equalizing plate 16 for mixing gas and air, premixing cavity 1 inside is opened with spout, spout uses straight injection type nozzle structure, spout is provided with 6 premixing nozzles 11 and is opened in both sides, premixing nozzle 11 left side is welded with ejector pipe one 12.Premixing cavity 1 outer wall is welded with ejector pipe two 17 for ejecting flue gas. Furnace mouth connecting flange 67 is welded with gas branch pipe 4 and makes it communicate with the inboard of mixing section gas chamber 69, and gas branch pipe 4 outside is welded with fire cover.

[0025] Specifically, the installation in side servo actuator 21 will drive bevel gear set 23 to work by rotating shaft 22, and then straight gear 24 rotates under the action of connecting shaft 26, finally premixing regulating ring 25 is driven to rotate, so that premixing chamber air intake adjustment is realized, air inlet is located in the inboard of fire pipe 5, and the air inlet amount can be adjusted by premixing regulating ring 25, ejector pipe two 17 is used for ejecting flue gas, so that combustion is more sufficient, so as to achieve the purpose of reducing nitrogen oxides, and gas branch pipe 4 outside is welded with fire cover to guide air flow.

[0026] With reference to Figure 2 Mixing section assembly 6, its fan fixed connection flange 66, fan fixed connection flange 66 left side is provided with furnace mouth connecting flange 67, furnace mouth connecting flange 67 is respectively and centrifugal fan and combustion furnace are adapted, and the side close to fan fixed connection flange 66 and furnace mouth connecting flange 67 is fixedly connected with mixing section main pipe 61, and mixing section main pipe 61 right side is welded with gas inlet main pipe 62, and gas inlet main pipe 62 bottom side is provided with hand valve 63, and gas inlet main pipe 62 is connected with center pipe adapter section 64, and is welded on center pipe fixed base 68 to give center pipe gas supply, and the gas intake amount is adjusted by main pipe gas inlet hand valve 65;

[0027] Specifically, the gas first enters the mixing section gas chamber 69 from the gas inlet main pipe 62 with a flange, and in this process, its inlet amount can be controlled and adjusted by the hand valve 63. At the same time, the gas also flows into the premixing cavity 1 from the peripheral gas branch pipe 4, and in the premixing cavity 1, the gas and air are further fully mixed with the help of the flow equalizing plate 16, and then enter the premixing nozzle 11 and are sprayed out through the injection pipe 12.

[0028] Referring to Figure 2 , the main power source of the premixing adjustment assembly 2 comes from the servo actuator 21 which is fixed to the mixing section main pipe 61 through the servo actuator support 27. The premixing adjustment assembly 2 is connected to the bevel gear set 23 through the shaft 22. The shaft 26 is arranged in the premixing cavity 1 and penetrates the mixing section and the premixing cavity 1 and connects the bevel gear set 23 and the spur gear 24. The spur gear 24 is engaged with the premixing adjustment ring 25.

[0029] Specifically, in this process, the servo actuator 21 installed on the side will play a role. The servo actuator 21 drives the bevel gear set 23 to start operation through the shaft 22. The rotation of the bevel gear set 23 drives the spur gear 24 to rotate under the action of the shaft 26. The rotation of the spur gear 24 eventually promotes the rotation of the premixing adjustment ring 25. The rotation of the premixing adjustment ring 25 realizes the adjustment of the air inlet amount of the premixing chamber, thereby ensuring the stability and efficiency of the entire gas and air mixing and spraying process.

[0030] Referring to Figure 2 , the center pipe assembly 3 makes the center pipe mounting column 31 and the center pipe fixing seat 68 press tightly under the action of the pressing rod 7. The bottom side of the center pipe mounting column 31 is provided with a sealing ring 8. The top end of the center pipe mounting column 31 is fixedly connected with the center pipe 32. The top side of the center pipe 32 is welded with the ignition electrode fixing seat 33. The left side of the ignition electrode fixing seat 33 is provided with the ignition electrode 34. The left side of the center pipe 32 is welded with the center pipe adjustment seat 36. The top side of the center pipe adjustment seat 36 is welded with the flame stabilizing disc 35. Eight swirl vanes are welded in the center of the flame stabilizing disc 35. Square grooves are uniformly distributed at the edge of the flame stabilizing disc 35.

[0031] Specifically, eight φ3 small holes are opened at the head of the center pipe 32 for gas outlet and ignition of the ignition needle 34. Eight φ4 oblique holes at an angle of 75° are opened at the rear of the flame stabilizing disc, and the branch pipe 37 is welded.

[0032] Working principle: gas enters into the mixed section gas chamber 69 (its intake is controlled and adjusted by hand valve 63) from gas intake main pipe 62 (with flange), at the same time, enters into premixing cavity 1 from peripheral gas branch pipe 4 and is further mixed with air through flow uniforming plate 16, is finally sprayed out from entering premixing nozzle 11 and through injection pipe 12. Simultaneously, servo actuator 21 installed on the side will work through driving bevel gear set 23 through rotating shaft 22, then straight gear 24 rotates under the action of connecting shaft 26, finally drives premixing adjusting ring 25 to rotate, so as to realize the air intake adjustment of premixing cavity.

[0033] Finally, it should be pointed out that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A forced draft self-adapting premix regulated burner head structure comprising a premixing chamber (1), characterized in that: The premixing cavity (1) adopts a whole ring cavity structure, the premixing cavity (1) inlet includes a gas inlet (13) and an air inlet (14), the gas inlet (13) right side is fixedly connected with a gas branch pipe (4), the gas branch pipe (4) right side is provided with a fire collecting pipe (5), the fire collecting pipe (5) inner side is provided with an air inlet, the premixing cavity (1) is internally provided with a gas center pipe assembly (3), the gas center pipe assembly (3) right side is provided with a mixing section assembly (6), the mixing section assembly (6) bottom side is provided with a premixing adjustment assembly (2), the premixing cavity (1) is internally provided with a premixing chamber (15).

2. A forced draft self-adapting premix regulated burner head structure according to claim 1, characterized in that: The premixing adjustment assembly (2) is mainly powered by a servo actuator (21), which is fixed to the mixing section main pipe (61) through an actuator support (27), the premixing adjustment assembly (2) is connected with a bevel gear set (23) through a rotating shaft (22), the premixing cavity (1) is internally provided with a connecting shaft (26), the connecting shaft (26) penetrates the mixing section and the premixing cavity (1) and communicates the bevel gear set (23) and a spur gear (24), the spur gear (24) is engaged with a premixing adjustment ring (25).

3. A forced draft self-adapting premix regulated burner head structure according to claim 1, characterized in that: The center pipe assembly (3) is compressed under the action of a compression rod (7) to make the center pipe mounting column (31) and the center pipe fixed seat (68) be compressed, the bottom side of the (31) is provided with a sealing ring (8), the center pipe mounting column (31) top end is fixedly connected with a center pipe (32), the center pipe (32) top side is welded with a ignition electrode fixed seat (33), the (33) left side is provided with an ignition electrode (34), the left side of the fixed center pipe (32) is welded with a center pipe adjustment seat (36), the (36) top side is welded with a flame stabilizing disc (35), the flame stabilizing disc (35) center is welded with eight swirler vanes, the edge is evenly distributed with square grooves.

4. A forced draft self-adapting premix regulated burner head structure according to claim 1, characterized in that: The mixing section assembly (6) is fixedly connected with a fan fixed connection flange (66), the fan fixed connection flange (66) left side is provided with a furnace mouth connection flange (67), the furnace mouth connection flange (67) is respectively matched with a centrifugal fan and a combustion furnace, the fan fixed connection flange (66) and the furnace mouth connection flange (67) are fixedly connected with a mixing section main pipe (61) on the side close to each other, the mixing section main pipe (61) right side is welded with a gas inlet main pipe (62), the gas inlet main pipe (62) bottom side is provided with a hand valve (63), the gas inlet main pipe (62) is connected with a center pipe adapter section (64) and is welded on the center pipe fixed seat (68) to supply gas to the center pipe and adjust the gas inlet amount through the main pipe gas inlet hand valve (65).

5. A forced draft self-adapting premix regulated burner head structure according to claim 4, characterized in that: The mixing section main pipe (61) inner side is welded with a cone center pipe, and the mixing section gas chamber (69) is formed between the two and is communicated with the gas inlet main pipe (62).

6. A forced draft self-adapting premix regulated burner head structure according to claim 4, characterized in that: The furnace mouth connection flange (67) is welded with the gas branch pipe (4) and is communicated with the inside of the mixing section gas chamber (69), and the gas branch pipe (4) outer side is welded with a fire collecting cover.

7. A forced draft self-adapting premix regulated burner head structure according to claim 1, wherein: The premixing cavity (1) is internally provided with an inner chamber, the inner chamber is provided with a flow uniforming plate (16) for mixing gas and air, the premixing cavity (1) is internally provided with a nozzle, the nozzle uses a direct injection type nozzle structure, the nozzle is provided with six premixing nozzles (11) and is provided with holes on both sides, the premixing nozzles (11) are welded with ejector pipes one (12) on the left side.

8. A forced draft self-adapting premix regulated burner head structure according to claim 1, characterized in that: The premixing cavity (1) is welded with ejector pipes two (17) on the outer wall for ejecting flue gas.

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