Stable combustion burner

Abstract

The utility model relates to the field of boiler combustors, in particular to a stable combustion combustor which comprises a combustor assembly, a flow dividing assembly is fixedly installed in the combustor assembly and comprises a flow dividing plate and five bluff bodies, the flow dividing plate is fixedly installed in the middle of the inner side of the combustor assembly, and the two bluff bodies are arranged at the top of the flow dividing plate; the other three bluff bodies are arranged at the bottom of the splitter plate, the bluff bodies are arranged at equal intervals, connecting clamping grooves are formed in the positions, provided with the bluff bodies, of the splitter plate, connecting clamping blocks are fixedly installed on the sides, facing the splitter plate, of the bluff bodies, the connecting clamping blocks are in sliding connection with the connecting clamping grooves, fixing grooves are formed in the inner sides of the connecting clamping blocks, and the connecting clamping blocks are connected with the fixing grooves in a sliding mode. The bluff body is made of high-temperature-resistant alloy, and the surface of the bluff body is coated with a metal ceramic coating, so that the effect of conveniently mounting and dismounting the bluff body is achieved, and the bluff body is convenient to replace.

Description

Technical Field

[0001] This application relates to the field of boiler burners, and in particular to a stable combustion burner. Background Technology

[0002] A boiler burner is a device used to mix fuel (such as coal, oil, natural gas, etc.) with air and ignite it to generate heat to heat or evaporate water or other media in a boiler. It is one of the core components of a boiler system and directly affects the boiler's operating efficiency, safety, and environmental performance.

[0003] Existing stable combustion burners typically have a blunt body inside. This blunt body is exposed to high temperature and high particle erosion environment for a long time. The tip of the V-shaped blunt body is prone to ablation, resulting in a short service life. Furthermore, it is difficult to disassemble and replace, making it inconvenient to use. Utility Model Content

[0004] In order to solve the problems mentioned in the background art, this application provides a stable combustion burner.

[0005] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0006] A stable combustion burner includes a burner assembly. A flow-dividing component is fixedly installed inside the burner assembly. The flow-dividing component includes a flow-dividing plate and five blunt bodies. The flow-dividing plate is fixedly installed in the middle of the inner side of the burner assembly. Two blunt bodies are located at the top of the flow-dividing plate, and the other three blunt bodies are located at the bottom of the flow-dividing plate. The blunt bodies are arranged at equal intervals. A connecting slot is provided at the location of the blunt body on the flow-dividing plate. A connecting block is fixedly installed on the side of the blunt body facing the flow-dividing plate. The connecting block is slidably connected to the connecting slot. A fixing groove is provided on the inner side of the connecting block, and the fixing groove engages with the connecting slot. The blunt bodies are made of a high-temperature resistant alloy, and the surface of the blunt bodies is coated with a metal-ceramic coating.

[0007] By adopting the above scheme, the flow divider is fixedly installed in the middle of the inner side of the burner assembly, which facilitates the diversion of the primary air carrying pulverized coal inside the inner shell, thus playing a role in flow field shaping. The bluff bodies are arranged at equal intervals, and five bluff bodies are arranged alternately at the top and bottom of the flow divider, so that the bluff bodies can play a role in flow field separation and disturbance enhancement. The staggered bluff bodies divide the airflow into multi-stage small-scale vortices, forming a series of high-temperature flue gas recirculation zones behind the bluff bodies, which heat the pulverized coal airflow in stages, thereby achieving the effects of combustion enhancement and flame stabilization. The fixed groove and connecting slot are connected to facilitate quick and easy installation and disassembly of the bluff bodies and facilitate the replacement of the bluff bodies. The surface of the bluff bodies is coated with a metal ceramic coating to enhance wear resistance and thus improve the service life of the bluff bodies.

[0008] Furthermore, an igniter is provided at one end of the blunt body, and the igniter is fixedly connected to the distributor plate.

[0009] By adopting the above scheme, the igniter is designed to easily generate an electric arc to ignite the pulverized coal, and its placement behind the blunt body effectively reduces ignition energy consumption and prevents flame interruption.

[0010] Furthermore, the thickness of the blunt body gradually increases as it approaches the igniter, and the blunt body has an arc-shaped structure on the side away from the splitter plate.

[0011] By adopting the above scheme, the bluff body facilitates the formation of physical barriers in the pulverized coal gas flow, resulting in a low-pressure vortex zone behind the bluff body when the gas flows around it. This causes the high-temperature flue gas in the furnace to flow in the opposite direction, forming a stable high-temperature recirculation zone, which plays a role in stabilizing combustion and enhancing combustion.

[0012] Furthermore, the burner assembly includes an inner shell, the middle of which is fixedly connected to both sides of the flow divider.

[0013] By adopting the above scheme, the inner shell facilitates the passage of primary air mixed with pulverized coal, which is conducive to combustion, and the diversion plate divides the pulverized coal airflow.

[0014] Furthermore, an outer shell is provided on the outside of the inner shell, and a connecting strip is fixedly installed between the inner shell and the outer shell.

[0015] By adopting the above solution and setting the connecting strip, it is easy to fix the outer shell and the inner shell together, so that a secondary air circulation channel is formed between the outer shell and the inner shell.

[0016] Furthermore, the outer shell has a constricted opening at the end facing the igniter, and the distance between the outer shell and the inner shell gradually decreases as they approach the igniter.

[0017] By adopting the above scheme, the inner shell has flared openings on the top and bottom near the igniter end, which helps to reduce the primary air velocity mixed with pulverized coal, reduce inertial force, promote the diffusion of pulverized coal particles, ensure uniform distribution of pulverized coal in the combustion zone, and avoid local oxygen deficiency.

[0018] Furthermore, the top and bottom of the inner shell are provided with thickened structures, and the top and bottom of the inner shell near the igniter end are provided with flared openings on the inner side.

[0019] By adopting the above scheme, the outer shell has a narrow opening at the end facing the igniter, which facilitates the acceleration and kinetic energy enhancement of secondary air, enhances the airflow penetration, ensures that the secondary air penetrates deep into the combustion core area, and improves the stable combustion effect.

[0020] Furthermore, the top and bottom of the outer shell and the inner shell are provided with longitudinal grooves, and the sides of the outer shell and the inner shell are provided with transverse grooves.

[0021] By adopting the above scheme, the longitudinal and transverse grooves facilitate thermal expansion compensation, stress release, and flow field optimization, thereby improving the combustion stability and extending the service life.

[0022] In summary, this application has the following technical effects:

[0023] The flow divider is fixedly installed in the middle of the inner side of the burner assembly, which facilitates the diversion of primary air carrying pulverized coal within the inner shell, thus shaping the flow field. Five bluff bodies are arranged at equal intervals, staggered at the top and bottom of the flow divider, enabling them to separate the flow field and enhance turbulence. These staggered bluff bodies divide the airflow into multiple small-scale vortices, forming a tandem high-temperature flue gas recirculation zone behind the bluff bodies, progressively heating the pulverized coal airflow, thereby achieving enhanced combustion and flame stability. The bluff bodies are easily and quickly installed and removed via a fixing slot and connecting clip, facilitating replacement. The surface of the bluff bodies is coated with a metal-ceramic coating, enhancing wear resistance and extending their service life. This combination of features facilitates convenient installation and removal of the bluff bodies, making replacement easy. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a flame-stabilized burner according to this application;

[0025] Figure 2 This is a three-dimensional structural diagram of the shunt component of this application;

[0026] Figure 3 This is an exploded view of the shunt component in this application;

[0027] Figure 4 This is a cross-sectional view of the shunt component of this application;

[0028] Figure 5 This is a cross-sectional view of the burner assembly of this application.

[0029] In the diagram, 101 is the burner assembly; 10101 is the outer shell; 10102 is the inner shell; 10103 is the connecting strip; 10104 is the longitudinal groove; 10105 is the transverse groove; 102 is the flow divider assembly; 10201 is the flow divider plate; 10202 is the blunt body; 10203 is the igniter; 10204 is the connecting block; 10205 is the connecting slot; and 10206 is the fixing slot. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings. Example

[0031] As attached Figure 1 To be continued Figure 5 As shown:

[0032] This utility model provides a stable combustion burner, including a burner assembly 101. A flow-dividing assembly 102 is fixedly installed inside the burner assembly 101. The flow-dividing assembly 102 includes a flow-dividing plate 10201 and five blunt bodies 10202. The flow-dividing plate 10201 is fixedly installed in the middle of the inner side of the burner assembly 101. This fixed installation of the flow-dividing plate 10201 in the middle of the inner side of the burner assembly 101 facilitates the diversion of primary air carrying pulverized coal within the inner shell 10102, thus creating a flow field. The shaping function involves two blunt bodies 10202 positioned at the top of the splitter plate 10201, and three more blunt bodies 10202 positioned at the bottom of the splitter plate 10201. The blunt bodies 10202 are arranged at equal intervals. This equal-interval arrangement of the blunt bodies 10202 facilitates their staggered placement at the top and bottom of the splitter plate 10201, enabling them to function as flow field separators and enhance disturbances. The staggered blunt bodies 10202 divide the airflow into multiple stages of small-scale vortices. A series of high-temperature flue gas recirculation zones are formed behind the blunt body 10202, which heat the pulverized coal gas flow in stages, thereby achieving combustion enhancement and flame stabilization. A connecting slot 10205 is provided at the location of the blunt body 10202 on the diverter plate 10201. A connecting block 10204 is fixedly installed on the side of the blunt body 10202 facing the diverter plate 10201. The connecting block 10204 is slidably connected to the connecting slot 10205. A fixing groove 10206 is provided inside the connecting block 10204. The 10206 engages with the connecting slot 10205, facilitating quick and easy installation and removal of the blunt body 10202 and making it easy to replace. The blunt body 10202 is made of high-temperature resistant alloy and has a metal-ceramic coating on its surface. This coating enhances its wear resistance and extends its service life.

[0033] The blunt body 10202 is equipped with an igniter 10203 at one end. The igniter 10203 is fixedly connected to the flow divider 10201. The igniter 10203 facilitates the generation of an electric arc to ignite the coal powder. Furthermore, its placement behind the blunt body 10202 effectively reduces ignition energy consumption and prevents flame interruption.

[0034] The thickness of the blunt body 10202 gradually increases as it approaches the igniter 10203, and the blunt body 10202 has an arc-shaped structure on the side away from the diverter plate 10201. The blunt body 10202 facilitates the formation of a physical barrier in the pulverized coal airflow, causing a low-pressure vortex zone to be generated behind the blunt body 10202 when the airflow flows around it. This entrains the high-temperature flue gas in the furnace to flow in the opposite direction, forming a stable high-temperature reflux zone, which plays a role in stabilizing combustion and enhancing combustion.

[0035] The burner assembly 101 includes an inner shell 10102. The inner middle of the inner shell 10102 is fixedly connected to both sides of the flow divider 10201. The inner shell 10102 facilitates the passage of primary air mixed with pulverized coal, which is convenient for combustion. The flow divider 10201 divides the pulverized coal airflow.

[0036] The inner shell 10102 is provided with an outer shell 10101 on the outside. A connecting strip 10103 is fixedly installed between the inner shell 10102 and the outer shell 10101. The connecting strip 10103 facilitates the fixed connection between the outer shell 10101 and the inner shell 10102, so that a secondary air circulation channel is formed between the outer shell 10101 and the inner shell 10102.

[0037] The outer shell 10101 has a constricted opening at the end facing the igniter 10203. The distance between the outer shell 10101 and the inner shell 10102 gradually decreases as they approach the igniter 10203. The constricted opening at the end of the outer shell 10101 facing the igniter 10203 facilitates the acceleration and kinetic energy enhancement of the secondary airflow, enhances the airflow penetration, ensures that the secondary airflow penetrates deep into the combustion core area, and improves the stable combustion effect.

[0038] The inner shell 10102 has a thickened structure at the top and bottom, and the top and bottom of the inner shell 10102 near the igniter 10203 have flared openings on the inside. The flared openings on the inside of the inner shell 10102 near the igniter 10203 help to reduce the primary air velocity mixed with pulverized coal, reduce inertial force, promote the diffusion of pulverized coal particles, ensure uniform distribution of pulverized coal in the combustion zone, and avoid local oxygen deficiency.

[0039] The outer shell 10101 and the inner shell 10102 are provided with longitudinal grooves 10104 at the top and bottom, and transverse grooves 10105 are provided on both sides of the outer shell 10101 and the inner shell 10102. The longitudinal grooves 10104 and the transverse grooves 10105 are provided to facilitate thermal expansion compensation, stress release and flow field optimization, thereby improving the stable combustion effect and extending the service life.

[0040] Specifically, the connecting strip 10103 facilitates the fixed connection between the outer shell 10101 and the inner shell 10102, creating a secondary airflow channel between them. The inner shell 10102, with its flared sides at the top and bottom near the igniter 10203, reduces the velocity of the primary air mixed with pulverized coal, lowers inertial force, promotes pulverized coal particle diffusion, ensures uniform pulverized coal distribution in the combustion zone, and avoids localized oxygen deficiency. The constricted opening at the outer shell 10101 facing the igniter 10203 accelerates and enhances the kinetic energy of the secondary air, increasing airflow penetration and ensuring the secondary air reaches the core combustion zone, improving stable combustion. The longitudinal groove 10104 and transverse groove 10105 facilitate thermal expansion compensation, stress release, and flow field optimization. The blunt body 10202 serves to improve combustion stability and extend service life. Its design facilitates the formation of a physical barrier in the pulverized coal airflow, causing a low-pressure vortex zone behind it. This vortex zone draws in high-temperature flue gas from the furnace, creating a stable high-temperature reflux zone that stabilizes and enhances combustion. The igniter 10203, positioned behind the blunt body 10202, generates an electric arc to ignite the pulverized coal, effectively reducing ignition energy consumption and preventing flame interruption. The fixed slot 10206 engages with the connecting slot 10205, allowing for quick and easy installation and removal of the blunt body 10202, facilitating its replacement. Furthermore, the blunt body 10202 is coated with a metal-ceramic coating, enhancing its wear resistance and extending its service life.

[0041] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A flame-stabilizing burner, characterized in that, The device includes a burner assembly (101), inside which a flow divider assembly (102) is fixedly installed. The flow divider assembly (102) includes a flow divider plate (10201) and five blunt bodies (10202). The flow divider plate (10201) is fixedly installed in the middle of the inner side of the burner assembly (101). Two blunt bodies (10202) are located at the top of the flow divider plate (10201), and the other three blunt bodies (10202) are located at the bottom of the flow divider plate (10201). The blunt bodies (10202) are arranged at equal intervals. The flow divider plate (10201) is provided with... A connecting slot (10205) is provided at the blunt body (10202). A connecting block (10204) is fixedly installed on the side of the blunt body (10202) facing the diverter plate (10201). The connecting block (10204) is slidably connected to the connecting slot (10205). A fixing groove (10206) is provided on the inner side of the connecting block (10204). The fixing groove (10206) is engaged with the connecting slot (10205). The blunt body (10202) is made of high temperature resistant alloy and the surface of the blunt body (10202) is coated with a metal ceramic coating.

2. The flame-stabilizing burner according to claim 1, characterized in that, One end of the blunt body (10202) is provided with an igniter (10203), and the igniter (10203) is fixedly connected to the distributor plate (10201).

3. A flame-stabilizing burner according to claim 2, characterized in that, The thickness of the blunt body (10202) gradually increases as it approaches the igniter (10203), and the blunt body (10202) has an arc-shaped structure on the side away from the distributor plate (10201).

4. A flame-stabilizing burner according to claim 1, characterized in that, The burner assembly (101) includes an inner shell (10102), the middle of which is fixedly connected to both sides of the flow divider (10201).

5. A flame-stabilizing burner according to claim 4, characterized in that, An outer shell (10101) is provided on the outside of the inner shell (10102), and a connecting strip (10103) is fixedly installed between the inner shell (10102) and the outer shell (10101).

6. A flame-stabilizing burner according to claim 5, characterized in that, The outer shell (10101) has a narrowed end facing the igniter (10203), and the distance between the outer shell (10101) and the inner shell (10102) gradually decreases as they approach the igniter (10203).

7. A flame-stabilizing burner according to claim 5, characterized in that, The inner shell (10102) has a thickened structure at the top and bottom, and the top and bottom of the inner shell (10102) near the igniter (10203) have flared openings on the inner side.

8. A flame-stabilizing burner according to claim 7, characterized in that, The top and bottom of the outer shell (10101) and the inner shell (10102) are provided with longitudinal grooves (10104), and the outer shell (10101) and the inner shell (10102) are provided with transverse grooves (10105) on both sides.

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