Short flame burner

Abstract

The utility model relates to the technical field of combustors, in particular to a short-flame combustor. The short flame burner comprises a fire observation section assembly, a fan mounting flange, a fire observation section air flue, a fire observation lens end cover, a fire observation lens, a fire observation section connecting flange, a mixing section, a mixing section front end flange, a gas mounting seat, a combustion-supporting air channel, a furnace mouth mounting flange, a gas inlet flange, a gas connecting pipe, a gas main pipe, a gas branch pipe and a gas nozzle, the central gas spraying pipe, a first peripheral gas spraying hole, a second peripheral gas spraying hole, a flame stabilizing disc supporting column, a rotational flow flame stabilizing disc, a rotational flow piece, a central combustion-supporting air channel, a fire gathering cover, a fire gathering cover sliding way and a fire gathering cover groove; and the fire observing section assembly comprises a fan mounting flange, a fire observing section air channel, a fire observing lens end cover, a fire observing lens and a fire observing section connecting flange. The flame length can be adjusted, generation of nitric oxide is reduced through partial premixing, flame is more stable through a center rotational flow structure, and generation of nitric oxide is reduced through staged combustion.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a short flame burner. Background Art

[0002] A boiler is an energy conversion device whose main function is to convert the chemical energy of the fuel into thermal energy through the combustion process, and then transfer the thermal energy to water or other working fluids through the heat transfer process, turning it into steam or hot water with a certain pressure and temperature.

[0003] The burner is an important component of the industrial boiler and has the function of releasing fuel energy into heat energy.

[0004] The furnace shapes of boilers are different, and different furnace types should be installed with burners with different flame shapes. However, the burners currently on the market are generally longer in flame length to achieve low-nitrogen effects. In the case of a short furnace, the long flame is not suitable for the furnace, which will cause the temperature at the rear end of the furnace and the exhaust gas to be too high, resulting in a poor heat exchange effect in the furnace and a risk of burning the furnace tubes.

[0005] Therefore, designing a burner that can ensure the full combustion of fuel, control and adjust the flame length and shape, ensure the stable and safe operation of the burner, and have low nitrogen oxide emissions is a problem that designers need to solve. Utility Model Content

[0006] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes a short flame burner.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A short flame burner is designed, and the short flame burner includes a fire viewing section component, a fan mounting flange, a fire viewing section air duct, a fire viewing lens end cover, a fire viewing lens, a fire viewing section connecting flange, a mixing section, a mixing section front end flange, a gas mounting seat, a combustion-supporting air channel, a furnace mouth mounting flange, a gas inlet flange, a gas connecting pipe, a gas main pipe, a gas branch pipe, a gas nozzle, a central gas nozzle, a first peripheral gas nozzle hole, a second peripheral gas nozzle hole, a flame stabilizing disk support, a swirl flame stabilizing disk, a swirl sheet, a central combustion-supporting air channel, a fire hood, a fire hood slide, and a fire hood groove;

[0009] The fire viewing section assembly includes a fan mounting flange, a fire viewing section air duct, a fire viewing lens end cap, a fire viewing lens, and a fire viewing section connecting flange. The rear end of the fan mounting flange sequentially passes through and connects the fire viewing section air duct and the fire viewing section connecting flange. The fire viewing lens end cap and the fire viewing lens are sequentially arranged above the fire viewing section air duct.

[0010] The rear end of the fire viewing section assembly is provided with a mixing section and a fire hood in sequence, the mixing section includes a front end flange of the mixing section, a gas mounting seat, a combustion-supporting air channel, and a furnace mouth mounting flange, the front end flange of the mixing section, the combustion-supporting air channel, and the furnace mouth mounting flange are connected in sequence, the gas mounting seat is arranged at the lower end of the combustion-supporting air channel, and the two are connected through and through;

[0011] A fire hood is provided at the end of the combustion-supporting air channel, which is movably connected by bolts in the fire hood slideway, and a plurality of fire hood grooves are evenly distributed around the circumference of the end of the fire hood;

[0012] A gas inlet flange and a gas connecting pipe are coaxially connected at the bottom and top of the gas mounting seat in sequence. The gas main pipe is arranged on the inner side of the combustion-supporting air channel, and the two are coaxially arranged. The gas main pipe is arranged at the end of the gas connecting pipe and the two are connected through. A plurality of gas branch pipes evenly distributed around the circumference are arranged on the outer side of the end of the gas main pipe. A gas nozzle is arranged at the end of each gas branch pipe. A central gas nozzle is arranged on the inner side of the gas nozzle, and a first peripheral gas nozzle hole and a second peripheral gas nozzle hole are arranged on the outer side in sequence.

[0013] A plurality of flame stabilizing disk supports are arranged at the end of the gas main pipe, a swirl flame stabilizing disk is arranged at the end of the flame stabilizing disk support, a plurality of swirl sheets are arranged on the swirl flame stabilizing disk, and a central combustion-supporting air channel is arranged in the middle.

[0014] Specifically speaking, the number of the gas branch pipes is 4 to 8.

[0015] Specifically speaking, the number of the central gas nozzles is 4 to 8.

[0016] Specifically, the number of the first peripheral gas injection holes is 8-16.

[0017] Specifically, the number of the second peripheral gas injection holes is 4-8.

[0018] Specifically speaking, the number of the swirl blades is 4 to 8.

[0019] Specifically, the number of the fire hood grooves is 4 to 8.

[0020] The design scheme proposed by the utility model has the following beneficial effects during application:

[0021] 1. The flame length can be adjusted, partial premixing is used to reduce the generation of nitrogen oxides, the central swirl structure is used to make the flame more stable, and staged combustion is used to reduce the generation of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the utility model;

[0024] Figure 3 for Figure 2 A cross-sectional view of

[0025] Figure 4 for Figure 2 Right view of;

[0026] Figure 5 For the utility model Figure 2 Left view of .

[0027] In the figure: 1 fire viewing section assembly, 1-1 fan mounting flange, 1-2 fire viewing section air duct, 1-3 fire viewing lens end cover, 1-4 fire viewing lens, 1-5 fire viewing section connecting flange, 2 mixing section, 2-1 mixing section front end flange, 2-2 gas mounting seat, 2-3 combustion-supporting air channel, 2-4 furnace mouth mounting flange, 3 gas inlet flange, 4 gas connecting pipe, 5 gas main pipe, 6 gas branch pipe, 6-1 gas nozzle, 6-2 center gas nozzle, 6-3 first peripheral gas nozzle hole, 6-4 second peripheral gas nozzle hole, 7 flame stabilizing disk support, 8 swirl flame stabilizing disk, 8-1 swirl sheet, 8-2 center combustion-supporting air channel, 9 fire hood, 9-1 fire hood slide, 9-2 fire hood groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Reference Figure 1-Figure 5 A short flame burner, the short flame burner comprises a fire viewing section assembly 1, a fan mounting flange 1-1, a fire viewing section air duct 1-2, a fire viewing lens end cap 1-3, a fire viewing lens 1-4, a fire viewing section connecting flange 1-5, a mixing section 2, a mixing section front end flange 2-1, a gas mounting seat 2-2, a combustion-supporting air channel 2-3, a furnace mouth mounting flange 2-4, a gas inlet flange 3, a gas connecting pipe 4, a gas main pipe 5, a gas branch pipe 6, a gas nozzle 6-1, a central gas nozzle 6-2, a first peripheral gas nozzle hole 6-3, a second peripheral gas nozzle hole 6-4, a flame stabilizing disk support 7, a swirl flame stabilizing disk 8, a swirl sheet 8-1, a central combustion-supporting air channel 8-2, a fire hood 9, a fire hood slide 9-1, and a fire hood groove 9-2;

[0030] The fire-viewing section assembly 1 includes a fan mounting flange 1-1, a fire-viewing section air duct 1-2, a fire-viewing lens end cap 1-3, a fire-viewing lens 1-4, and a fire-viewing section connecting flange 1-5. The rear end of the fan mounting flange 1-1 sequentially passes through and connects the fire-viewing section air duct 1-2 and the fire-viewing section connecting flange 1-5. The fire-viewing lens end cap 1-3 and the fire-viewing lens 1-4 are sequentially arranged above the fire-viewing section air duct 1-2.

[0031] The rear end of the fire-viewing section assembly 1 is provided with a mixing section 2 and a fire-collecting hood 9 in sequence. The mixing section 2 includes a front end flange 2-1 of the mixing section, a gas mounting seat 2-2, a combustion-supporting air passage 2-3, and a furnace mouth mounting flange 2-4. The front end flange 2-1 of the mixing section, the combustion-supporting air passage 2-3, and the furnace mouth mounting flange 2-4 are connected in sequence. The gas mounting seat 2-2 is arranged at the lower end of the combustion-supporting air passage 2-3, and the two are connected in sequence.

[0032] A fire cover 9 is provided at the end of the combustion-supporting air channel 2-3, which is movably connected by bolts in the fire cover slideway 9-1, and a plurality of fire cover grooves 9-2 are evenly distributed around the circumference of the end of the fire cover 9;

[0033] A gas inlet flange 3 and a gas connecting pipe 4 are coaxially connected below and above the gas installation seat 2-2 in sequence. A gas main pipe 5 is arranged on the inner side of the combustion-supporting air channel 2-3. The two are coaxially arranged. The gas main pipe 5 is arranged at the end of the gas connecting pipe 4 and the two are connected through. A plurality of gas branch pipes 6 evenly distributed around the circumference are arranged on the outer side of the end of the gas main pipe 5. A gas nozzle 6-1 is arranged on the end of each gas branch pipe 6. A central gas nozzle 6-2 is arranged on the inner side of the gas nozzle 6-1, and a first peripheral gas spray hole 6-3 and a second peripheral gas spray hole 6-4 are arranged on the outer side in sequence.

[0034] A plurality of flame stabilizing disk supports 7 are provided at the end of the gas main pipe 5, a swirl flame stabilizing disk 8 is provided at the end of the flame stabilizing disk support 7, a plurality of swirl sheets 8-1 are provided on the swirl flame stabilizing disk 8, and a central combustion-supporting air channel 8-2 is provided in the middle.

[0035] It should be further explained that the number of gas branch pipes 6 is 4 to 8.

[0036] It should be further explained that the number of the central gas nozzles 6-2 is 4 to 8.

[0037] It should be further explained that the number of the first peripheral gas injection holes 6 - 3 is 8 to 16.

[0038] It should be further explained that the number of the second peripheral gas injection holes 6 - 4 is 4 to 8.

[0039] It should be further explained that the number of swirl blades 8-1 is 4 to 8.

[0040] It should be further explained that the number of the fire hood grooves 9-2 is 4 to 8.

[0041] Working mode: The fire-viewing section air duct 1-2 is used as a channel for the combustion-supporting air to flow through, and guides the combustion-supporting air to the boiler furnace. The gas inlet flange 3 is used as a channel for the gas to enter the burner, and guides the gas to the boiler furnace.

[0042] The combustion-supporting air enters the burner through the fire-viewing section air duct 1-2, flows downstream, passes through the combustion-supporting air channel 2-3, and then enters the flame-collecting hood 9. It is divided into two parts in front of the swirl flame-stabilizing disk 8. The first part flows out from the swirl plate 8-1 and the central combustion-supporting air channel 8-2 to form the central swirl combustion-supporting air; the second part flows out from between the outer periphery of the swirl flame-stabilizing disk 8 and the inner side of the flame-collecting hood 9 to form the peripheral combustion-supporting air.

[0043] The gas enters from the gas inlet flange 3, passes through the gas mounting seat 2-2 and the gas connecting pipe 4 and enters the gas main pipe 5. It is divided into several parts at the end of the gas main pipe 5. Each part enters each gas branch pipe 6 and continues to flow backward. Then it is divided into two parts in the gas nozzle 6-1. The first part is ejected from the inner central gas nozzle 6-2, develops to the center of the swirl flame stabilizing disk 8, and after mixing with the central combustion-supporting wind, it develops to the rear end to form a central swirl flame under the action of the combustion-supporting wind ejected from the central combustion-supporting wind channel 8-2. Under the action of the swirl, the flame is more stable; the second part is ejected from the outer first peripheral gas nozzle 6-3 and the second peripheral gas nozzle 6-4, mixes with the peripheral combustion-supporting wind and forms a peripheral diffusion flame with the burner. Under the grading effect, the flame is more dispersed, no concentrated high-temperature area is generated, and the generation of nitrogen oxides is reduced. The fire hood 9 can be adjusted forward and backward through the fire hood slide 9-1, and the flame width and length are controlled through the fire hood groove 9-2, so that the flame fits the furnace shape better.

[0044] Due to the effect of grading and strong swirl, a diffusion flame is formed, achieving complete combustion under the optimal excess combustion air coefficient, reducing nitrogen oxides. Each combustion area produces a mixing effect and shearing effect under the effect of multiple grading, undergoing intense material and heat transfer, and together forming a stable and efficient combustion area. The radial development of the gas can shorten the flame length.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A short flame burner, characterized in that: The short flame burner comprises a fire-viewing section assembly (1), a fan mounting flange (1-1), a fire-viewing section air duct (1-2), a fire-viewing lens end cover (1-3), a fire-viewing lens (1-4), a fire-viewing section connecting flange (1-5), a mixing section (2), a mixing section front end flange (2-1), a gas mounting seat (2-2), a combustion-supporting air duct (2-3), a furnace mouth mounting flange (2-4), a gas inlet flange (3), a gas connecting pipe (4), a gas main pipe (5), a gas branch pipe (6), a gas nozzle (6-1), a central gas nozzle (6-2), a first peripheral gas nozzle hole (6-3), a second peripheral gas nozzle hole (6-4), a flame stabilizing disk support (7), a swirl flame stabilizing disk (8), a swirl sheet (8-1), a central combustion-supporting air duct (8-2), a fire-collecting hood (9), a fire-collecting hood slideway (9-1), and a fire-collecting hood groove (9-2); The fire-viewing section assembly (1) comprises a fan mounting flange (1-1), a fire-viewing section air duct (1-2), a fire-viewing lens end cover (1-3), a fire-viewing lens (1-4), and a fire-viewing section connecting flange (1-5); the rear end of the fan mounting flange (1-1) is connected to the fire-viewing section air duct (1-2) and the fire-viewing section connecting flange (1-5) in sequence; the fire-viewing lens end cover (1-3) and the fire-viewing lens (1-4) are arranged in sequence above the fire-viewing section air duct (1-2); The rear end of the fire-viewing section assembly (1) is provided with a mixing section (2) and a fire-collecting hood (9) in sequence. The mixing section (2) comprises a mixing section front end flange (2-1), a gas mounting seat (2-2), a combustion-supporting air passage (2-3), and a furnace mouth mounting flange (2-4). The mixing section front end flange (2-1), the combustion-supporting air passage (2-3), and the furnace mouth mounting flange (2-4) are connected in sequence. The gas mounting seat (2-2) is arranged at the lower end of the combustion-supporting air passage (2-3), and the two are connected in sequence. A fire hood (9) is provided at the end of the combustion-supporting air channel (2-3), which is movably connected via bolts in a fire hood slideway (9-1), and a plurality of fire hood grooves (9-2) are evenly distributed around the circumference of the end of the fire hood (9); A gas inlet flange (3) and a gas connecting pipe (4) are coaxially connected in sequence below and above the gas mounting seat (2-2); the gas main pipe (5) is arranged inside the combustion-supporting air channel (2-3); the two are coaxially arranged; the gas main pipe (5) is arranged at the end of the gas connecting pipe (4); the two are connected in sequence; a plurality of gas branch pipes (6) evenly distributed in a circumference are arranged outside the end of the gas main pipe (5); a gas nozzle (6-1) is arranged at the end of each gas branch pipe (6); a central gas nozzle (6-2) is arranged inside the gas nozzle (6-1); and a first peripheral gas spray hole (6-3) and a second peripheral gas spray hole (6-4) are arranged in sequence outside the gas main pipe (5); A plurality of flame stabilizing disk supports (7) are provided at the end of the gas main pipe (5), a swirl flame stabilizing disk (8) is provided at the end of the flame stabilizing disk support (7), a plurality of swirl sheets (8-1) are provided on the swirl flame stabilizing disk (8), and a central combustion-supporting air channel (8-2) is provided in the middle.

2. A short flame burner according to claim 1, characterized in that: The number of the gas branch pipes (6) is 4 to 8.

3. A short flame burner according to claim 1, characterized in that: The number of the central gas nozzles (6-2) is 4 to 8.

4. A short flame burner according to claim 1, characterized in that: The number of the first peripheral gas injection holes (6-3) is 8 to 16.

5. A short flame burner according to claim 1, characterized in that: The number of the second peripheral gas injection holes (6-4) is 4 to 8.

6. A short flame burner according to claim 1, characterized in that: The number of the swirl sheets (8-1) is 4 to 8.

7. A short flame burner according to claim 1, characterized in that: The number of the fire hood grooves (9-2) is 4 to 8.

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